SPECIFICATION FOR MAJOR ELECTRICAL...

VISAKH MARKETING INSTALLATION RESITEMENT

PROJECT BLACK OIL TERMINAL

Doc No:254625-300-RQ-ELE-001 Rev: C of 26

P:\Andheri\IndiaProject\254625 HPCL- Black Oil Terminal\Procurement\Switchgear\04.09.09\PDF\254625-300-RQ-ELE-

001.doc

SPECIFICATION

FOR MAJOR ELECTRICAL EQUIPMENT

Hindustan Petroleum Corporation Ltd

Visakha Dispatch Station

VR-ATP Area, Naval Base Post

Visakhapatnam - 530 014

Andhra Pradesh

Mott MacDonald Consultants (India) Pvt. Ltd.

Kothari House, CTS No. 185

Off Andheri - Kurla Road

Andheri (East)

Mumbai 400 059





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List of Contents Pages

1.0 Introduction .................................................................................................................... 5

2.0 Location and Environmental Conditions........................................................................ 5

2.1. Plant Location .................................................................................................................5

2.2. Environmental Conditions ..............................................................................................5

2.3. Electrical System Data....................................................................................................5

3.0 Scope of Supply.............................................................................................................. 6

3.1. Electrical Equipment; .....................................................................................................6

3.2. Engineering Services ......................................................................................................8

3.3. Exclusions.......................................................................................................................8

4.0 Codes and Standards....................................................................................................... 9

4.1. General............................................................................................................................9

4.2. Conflicting Requirements ...............................................................................................9

5.0 Design requirements ....................................................................................................... 9

5.1. General............................................................................................................................9

5.2. 33kV Switchgear.............................................................................................................9

5.3. LV Switchgear ................................................................................................................9

5.4. DC system (Battery & Battery Charger System) ............................................................10

6.0 Name Plates .................................................................................................................. 10

7.0 Makes Of Components ................................................................................................. 11

8.0 Painting & Finishing:.................................................................................................... 11

9.0 Inspection and Testing.................................................................................................. 11

10.0 Testing and Commissioning at site............................................................................... 12

11.0 Vendor Documentation................................................................................................. 13

12.0 Statutory Approval ....................................................................................................... 13

13.0 Spares and Special Tools.............................................................................................. 13

14.0 Installation and Commissioning ................................................................................... 13

Appendix - A: Table of Compliance ........................................................................................14

Appendix - B: Codes & Standards ..........................................................................................16

Appendix -C: Requisition for Engineering Documents ..........................................................20

Appendix - D: Specification for 33KV Switchgear.................................................................22

Appendix - E: Specification for LV Switchgear......................................................................23





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Appendix - F: Specification for DC System............................................................................24

Appendix - G: Recommended List of approved vendors ........................................................25

Appendix - H: Drawings & Single Line Diagrams..................................................................26





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1.0 Introduction

This specification covers the minimum requirements for the Design, Engineering, Supply &

Material procurement, Fabrication, Assembly, Painting, Inspection at manufacturers works,

Supply & Delivery to site, Testing and Commissioning of Major Electrical Equipment (33kV

Switchgear, LV Switchgears, 110V D.C. UPS System) for “Black Oil Terminal Project” of

M/s. HPCL located at Visakhapatnam, A.P., India.

Following are the definitions:

Owner/Purchaser M/s. Hindustan Petroleum Corporation Ltd.

Consultant Mott MacDonald Consultants (India) Pvt. Ltd.[MMCI]

Vendor Supplier of 33kV Switchgear, LV Switchgears & 110V

D.C. System

Shall This is to be understood as mandatory in relation to the

requirements of this document.

Should This is to be understood as a strong recommendation to

comply with the requirements of this document.

Equipment This is to be understood as vendor supplied equipment

with all accessories.

The Vendor shall ensure that the design complies with the requirements of this specification

and standards. The Guaranteed Technical Particulars enclosed with related Equipment

specification, which forms part of this specification, shall be completed by the Vendor. The

Vendor shall highlight any non-compliance at the offer stage in the Table of Compliance,

Appendix A. Not providing completed compliance table and Guaranteed Technical Particulars

can cause rejection of the offer. Failure to clearly identify specific deviations shall be assumed

by the Purchaser to be total compliance with the specification.

This specification does not relieve the Vendor from final guarantee as to materials, apparatus,

workmanship and performance of the equipment supplied.

2.0 Location and Environmental Conditions

2.1. Plant Location

Black Oil Terminal Project is located at Visakhapatnam, A.P, India. 33kV & L.V. switchgears,

110V D.C. UPS & DCDB shall be located in Main Substation within the Plant Complex.

2.2. Environmental Conditions

Refer Doc No.: 254625-300-SP-GEN-001 for details.

2.3. Electrical System Data

Refer Doc No.: 254625-300-DS-ELE-001 for details.





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3.0 Scope of Supply

The following Equipment shall be supplied, in accordance with this specification; standards

stated herein & enclosed appendices:

3.1. Electrical Equipment;

Sr.

No. Item Description Unit Quantity Remarks

1.

Indoor type 33kV Main Switchgear with supporting

base frames as per the following details, attached SOQ

& 33kV Single Line Diagram. (APSEB 33kV

Switchgear)

Rated voltage 33 kV

Highest system voltage 36 kV

Rated Bus-bar current 630A

Short time withstand current 25kA for 3 Sec.

Single Breaker Panel

(Refer Appendix-D & H)

Set

1

2. Indoor type 33kV Main Switchgear panel (1-I/C + 2-

Out-going feeders) with supporting base frame as per

the following details, attached SOQ & 33kV Single Line

Diagram (HPCL 33kV Switchgear)

Rated voltage 33 kV

Highest system voltage 36 kV

Rated Bus-bar current 630A

Short time withstand current 25kA for 3 Sec.

Three Breaker Panel (1 I/C + 2 O/G’s)

(Refer Appendix-D & H)

Set

1

3.

415V PMCC for Plant as per following details &

attached SOQ & SLD including horizontal, vertical

busbar arrangement and cable alleys:

Rated Voltage : 415V

Highest System Voltage : 433V

Rated Busbar Current : 3200A

Short Circuit Withstand Current : 50kA for 1 sec.

(Refer Appendix-E & H)

Set 1

4. 415V PCC for Electrical Heat Tracing as per following

details & attached SOQ & SLD including horizontal,

vertical busbar arrangement and cable alleys:




Short Circuit Withstand Current : 50kA for 1 sec.


Set 1





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Sr.

No. Item Description Unit Quantity Remarks

5. 415V Wagon Filling MCC as per following details &

attached SOQ & SLD:




Short Circuit Withstand Current : 50kA for 1 sec


Set 1

6. 415V Bunkering/Shipping MCC as per following details

& attached SOQ & SLD:






Set 1

7. 415V T/T Filling MCC as per following details &

attached SOQ & SLD:






Set 1

8. Breaker handling trolley (For L.V. Breakers) No. 2

9. PLC Based Instrument Interface Panel-1 with

Engineering Work Station & Ethernet Cubicle as per

Interface Block Diagram

No. 1

10. PLC Based Instrument Interface Panel-2 No. 1

11.

Dummy Panel – Dimensions shall be in line with

respective 415V overall panel dimension and width of

the dummy panel shall be approximately 700mm.

No. 5

12. 110V DC system (110V D.C. UPS & DCDB) with

a) SMF (VRLA) battery complete with racks &

accessories.

b) One No. Float charger

c) One No. Float cum Boost charger

d) DCDB

(Refer Appendix-F & H)

Set 1

•••• Inspection and Testing as specified.

•••• Submission of documents as specified.

•••• Painting as specified.





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•••• Preparation of shipment and delivery to site.

•••• Spares for two years normal operation.

•••• Start-up spares and commissioning spares.

•••• List of special tools required (Vendor to provide list with the bid).

•••• Any other items, required to make system complete.

•••• Testing & Commissioning.

•••• Supply & laying of Communication cables and control cables (including termination

material) between PLC based Instrument Interface panel to respective Electrical panel

within the substation or MCC building. Refer Interface Block Diagram. Vendor to note that

cable laying between main substation and MCC room-2 shall be underground in excavated

trench. Vendor shall provide necessary protection bricks & sand on laid cables.

3.2. Engineering Services

The Vendor shall provide engineering services, which shall include, but not necessarily be

limited to, the following:

•••• Providing/coordinating detailed design of all equipment and components within the scope

of supply.

•••• Resolving engineering queries related to the equipment and components within the scope of

supply.

•••• Performing all relevant calculations pertaining to the equipment and components within the

scope of supply.

•••• Providing progress reports etc.

•••• Providing expediting services for all sub-vendors.

•••• Providing quality assurance, including all sub-vendors with respect to ISO 9000 or

equivalent.

•••• Quality Assurance.

•••• Training of client’s personnel at site / Vendor’s shop.

•••• Inspection Test Plan

•••• QA Plan

•••• FAT Procedure

•••• Manufacturing Schedule

3.3. Exclusions

• Installation/Erection.

• Power Cables and associated termination material cable glands & lugs.

• Synchronising Panel

• Busduct

• Transformer





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4.0 Codes and Standards

4.1. General

The supplied Equipment shall meet the requirements of this specification and latest edition of

applicable standards listed in enclosed Appendix-B.

4.2. Conflicting Requirements

In case of conflict between documents relating to the enquiry or purchase order, the following

priority of documents shall apply.

First priority : Purchase order and variations thereto

Second priority : Data/requisition sheets and drawings

Third priority : This engineering specification.

Fourth priority : International standards.

Note: Should any conflict arise either before or after order placement the Vendor shall

immediately inform the Purchaser for technical resolution of the conflict.

5.0 Design requirements

5.1. General

5.1.1 The vendor shall offer a complete package comprising of 33kV Switchgear, LV Switchgears

with soft starter & VFD, PLC Based Instrument Interface Panel, 110V DC System. Refer

enclosed Specification and Single line diagram for details.

5.1.2 All equipment shall be designed to operate satisfactorily under the ambient, environmental and

power supply conditions as specified in ‘Electrical System Data’.

5.1.3 All Switchgears, MCC Boards shall be capable of withstanding the maximum fault current that

may arise, duly considering the maximum fault levels on high voltage system, negative tolerance

on transformer impedance and maximum possible motor contribution for maximum possible

fault clearing time on ultimate backup protection but not lower than one second in any case.

5.2. 33kV Switchgear

5.2.1 33kV Switchgear shall be designed to withstand the maximum fault current, voltage variation of

±10%, 25kA for 3 seconds.

5.2.2 Further details of the 33kV switchgear are mentioned in 33kV Switchgear specification. Spec.

No.: 254625-300-SP-ELE 001 attached in Appendix-D.

5.3. LV Switchgear

5.3.1 LV Switchgear shall be designed to withstand the maximum fault current, voltage variation of

±10%, and 50kA for 1second.

5.3.2 LV switchgear shall comprise of PMCC, PCC, MCC with soft starters & VFD and separate PLC

Based Instrument Interface Panel & Engineering Work Station.

5.3.3 The vendor shall give a detail write-up with sketches, block diagrams, circuit diagrams to

explain the principle of operation & salient features of Drive unit offered, along with the offer.

5.3.4 Busduct (By others) shall be provided from transformer (By others) to PMCC / PCC incomer &

for MCC incomers Cables shall be provided.





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5.3.5 Further details of the LV switchgear are mentioned in LV Switchgear specification. Spec. No.: 254625-300-SP-ELE-003 attached in Appendix-E.

5.4. DC system (Battery & Battery Charger System)

5.4.1 DC system shall be 110V and shall comprise of Battery, Battery charger & DCDB.

5.4.2 D.C. system sizing shall be carried out by vendor at offer stage based on D.C. requirement of

offered 33kV switchgear, L.V. switchgear and Critical lighting requirements.

5.4.3 Battery Shall be Sealed Maintenance Free – Valve Regulated Lead Acid (SMF-VRLA) type &

Battery back up period shall be 2 Hrs.

5.4.4 DC distribution board shall be integral part of DC UPS & provided to feed various loads. The

provision of incoming and outgoing feeders on DC distribution boards shall be as specified in

the enclosed SLD. However number of outgoing feeders & adequacy of component ratings shall

be verified by vendor at offer stage.

5.4.5 Further detail of the DC System are mentioned in Specification. No.: 254625-300-SP-ELE- 006

attached in Appendix-F.

6.0 Name Plates

6.1 Permanent non-corrosive nameplate with engraved white letters on black background indicating

the switchgear designation shall be fixed at the top of the central panel.

6.2 Name plates shall contain the following information:

First line : Equipment Item No.

Second line : Equipment Description

Third line : Equipment Rating.

Fourth Line : System voltage.

6.3 The following information shall be inscribed on a non-destructive, corrosion-resistant, indelible

name/rating plate attached to the inner side of the unit enclosure door:

• Purchaser's order number.

• Year of manufacture.

• Name of Manufacturer.

• Type and serial number of unit.

• Purchaser’s Equipment Number.

• Nominal input current and voltage (incl. nature of current & number of phases).

• Rated nominal output current and voltage.

• Nominal DC / battery voltage.

• Ingress protection degree.

6.4 All terminals of equipment and components shall be identifiable by alphanumerical markings in

accordance with the Manufacturer's drawings. Terminals of input and output supply cables

shall be clearly and uniquely marked to indicate their purpose and the phase/polarity of the

supply. All wires shall be marked according to the electrical diagrams with closed loop markers

(ferrules) or stamped. Danger labels shall have black letters on a yellow background.





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7.0 Makes Of Components

Makes of components shall be as per Recommended sub-vendor list attached in tender

document.

8.0 Painting & Finishing:

All metal surfaces shall be thoroughly cleaned and degreased, pickled and phosphatised.

Thereafter, a coat of phosphate paint and a coat of zinc chromate primer shall be applied. After

removing all imperfections, all metal surfaces shall be sprayed with two coats of final epoxy

based paint as per colour shade Silver grey No. 628 (IS-5). All unpainted parts shall be plated to

prevent corrosion.

9.0 Inspection and Testing

9.1 The responsibility for inspection, certification, etc. of all materials, parts lies with the Vendor.

The Vendor shall specify all of the inspection and testing requirements in the quality plan

which shall identify the activities requiring the Owner’s approval, review, witnessing etc.

Inspection and testing requirements shall be in accordance with this specification, other All

Equipment shall be inspected for compliances with:

• Requirement of Owner’s specification & correspondence therefore.

• Applicable codes, standards and specifications, which shall also include sub-referenced

standards therein.

• Test and Inspection Plans produced by the vendor.

Inspectors have the right to request additional inspections or tests to ensure that the equipment

complies with the specification and all relevant codes & standards.

9.2 Manufacturer shall furnish valid Type Test Certificates of similar models for all offered

equipment along with the offer. Fresh type tests for the equipment are not needed, provided the

Manufacturer can submit certificates that the equipment complies with all type tests as

prescribed by IEC/IS Standard specifying the test requirements for that equipment.

9.3 Routine tests on the equipment shall be carried out as per the relevant IS/IEC. Equipment

offered for final inspection shall be complete and ready for shipment, with the possible

exception of the final paint finish.

9.4 Routine Test certificates to be submitted for Equipment and its all auxiliaries. Type test

certificate of similar equipment shall be submitted.

9.5 Vendor to furnish required copies of test certificates, Ref Documents, Drawings, and

Instruction Manuals before Equipment are dispatched.

9.6 Factory acceptance test (FAT) is required to be done at no extra cost to the purchaser. FAT

procedure for every equipment shall be furnished. The purchaser or his representative shall be

advised of the tentative date for FAT at least 3 weeks in advance prior to the test date.

9.7 Any defects found by the TPI or the Owner’s appointed Inspector shall be rectified in his

presence. Where this is not possible or practical, check lists shall be prepared and signed by the

Third Party Inspector stating all “pending items”. Copies of these lists shall be sent to the

Owner to enable their subsequent checking. The equipment shall not leave the Vendor factory

before all defects have been rectified and without the written permission of the Owner.

9.8 All spare parts shall be subjected to the same inspection standards and full material certification

as the main order.





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9.9 The equipment shall not leave the Vendor / Sub-Vendor’s factory before all discovered defects

have been rectified and without the written permission of the Owner/Purchaser.

9.10 Any acceptance or release of equipment following an inspection or test activity shall in no way

relieve the Vendor of his contractual responsibility to provide guarantees as to the suitability of

the materials, workmanship and performance of the equipment in accordance with this

Specification.

9.11 Owner/Consultant reserves the right to waive the inspection at any stage. Inspection shall be

carried out only on receipt of Vendor's internal test report of the equipment offered and scrutiny

of the same. In the event, on receipt of inspection call, the Owner/Consultant’s representative

reaches the Vendor's works and finds the material not ready for inspection/incomplete/has short

supply, the inspector will return to his base station and all expenses incurred by the inspector

including to and from travelling expenses from his base station to place of inspection, boarding

and lodging etc shall be reimbursed by Vendor.

10.0 Testing and Commissioning at site

10.1 The responsibility of testing, commissioning and functional testing of equipment lies with

vendor.

10.2 Vendor shall perform the following minimum tests at site for respective major electrical

equipment.

I 33kV Switchgear:

a Insulation resistance test.

b Power frequency high voltage test if directed by Owner / MMCI.

c C.T. Polarity test & ratio test.

d Relay operation test by primary & secondary injection method.

e Functional check of the control circuit.

f Checking of all relay setting.

g ON / OFF Operation of the breakers both manually & electrically in test as well as service

position.

II L.V. Switchgear:

a Insulation resistance test.

b Relay operation test by secondary injection method.

c Functional test of the control circuit.

d Checking of setting of all relays / release.

e ON / OFF Operation of breaker both manually & electrically in test as well as service positions.

f All outgoing feeder functional test.

g Interface PLC Panel functional and simulation test with TAS as well as from PLC Panel in

totality. Co-ordination with TAS vendor while pre-commissioning activity.

III D.C. UPS System

a Insulation Test.

b Functional Test of D.C. UPS & Battery.





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11.0 Vendor Documentation

11.1 All information listed below is to be furnished along with the offer as a minimum.

(a) Clause wise comments / deviations on specification in `Table of Compliance’ [enclosed

Appendix A]. If not furnished, compliance to all requirements in specifications will be

binding on the Vendor.

(b) Duly filled up Guaranteed Technical Particulars.

(c) Type test certificates.

(d) Technical Catalogues.

(e) List of clientele for similar equipment in last 5 years.

(f) Documents as per Requisition for Engineering Documents (RED).

(g) General arrangement drawing (including sectional drawing) showing dimensions, weight,

foundation details, floor cutouts and cable entry details of all the equipment.

11.2 The Manufacturer shall furnish the drawings and documents as per enclosed Requisition for

Engineering Documents - RED Form [Appendix-C].

11.3 The Owner/Consultant will review drawings submitted by Vendor & return to the Vendor one

copy of drawings with comments to carry out necessary changes, if any, during the engineering

/ manufacturing stage.

11.4 The documents required by the Third Party Inspection Agency are not covered under this

specification. The Vendor shall provide all the drawings and documents required by the Third

Party Inspection agency in compliance with the applicable codes and standards.

12.0 Statutory Approval

The Major Electrical Equipment supplied shall be acceptable to local Electrical Inspectorate and

Statutory bodies. Changes required, if any, shall be carried out by the vendor without any extra

cost.

13.0 Spares and Special Tools

13.1 Spares

The Vendor shall include all necessary spares for testing, pre-commissioning, commissioning.

In addition to above, Vendor to provide spares for two years normal operation.

13.2 Special tools

The Vendor shall supply a set of any special tools, which are required for the commissioning,

operation and maintenance of the equipment being supplied. A list of special tools shall be

furnished along with the offer.

14.0 Installation and Commissioning

Vendor shall dispatch Installation instructions at least 2 weeks before the arrival of the

equipment.

Vendor shall offer qualified personnel from the Manufacturer to carryout site testing and

commissioning of all equipment supplied under this contract.





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Appendix - A: Table of Compliance

The Vendor shall confirm that clauses of the specification have been complied with/accepted or further

clarifications are desired, or Vendor has taken a deviation with reason thereto.

CLIENT :

M/s. Hindustan Petroleum Corporation Ltd.

Black Oil Terminal Project

VENDOR REF.

Spec. Clause

No.

Conforms

Yes/No

Alternative

Yes/No Clarification

1

2

2.1

2.2

2.3

3

3.1

3.2

3.3

4

4.1

4.2

5

5.1

5.2

5.3

5.4

6

7

8

9

10

11

12

13





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CLIENT :



VENDOR REF.

Spec. Clause

No.

Conforms

Yes/No

Alternative


14

Appendix A:

Appendix B:

Appendix C:

Appendix D:

Appendix E:

Appendix F:

Appendix G:

Appendix H:





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Appendix - B: Codes & Standards

HV & LV Switchgear

IS 13118 : 1991

Reaffirmed 2002

: High Voltage alternating current Circuit Breaker.

IS 12729 : 2004 : Common Specification for High-Voltage Switchgear and Controlgear

Standards

IS 3427 : 1997

Reaffirmed 2002

: A.C. Metal Enclosed Switchgear and Controlgear for Rated Voltages

Above 1 kV and Up to and Including 52 kV

IS 9921 – Part 1 : 1981

Reaffirmed 2002

: Specification for Alternating Current Disconnectors (Isolators) and

Earthing Switches for Voltages Above 1 000 V - Part I : General and

Definitions

IS-9046 : 1978

Reaffirmed 2002

: AC contactors of voltage above 1000 V upto and including 11000 V.

IS-6875 – Part 2 : 1973

Reaffirmed 1992

: Control switches (switching devices for control and auxiliary circuits

including contactors relays) for voltages upto and including 1000V

AC and 1200V DC - Push Button and related control switches.

IS-3231 : 1986

Reaffirmed 1997

: Electrical relays for power systems protection: Part 0 – General

introduction

IS-2705 Part 1 : 1992

Reaffirmed 2002 : Current Transformers : Part 1 – General Requirements

IS-2705 Part 2 : 1992

Reaffirmed 2002 : Current Transformers : Part 2 – Measuring Current Transformers

IS-2705 Part 3 : 1992

Reaffirmed 2002 : Current Transformers : Part 3 – Protective Current Transformers

IS-2705 Part 4 : 1992

Reaffirmed 2002 :

Current Transformers : Part 4 – Protective Current Transformers for

special purpose

IS 12021 : 1987 : Control Transformer

IS-3156 Part-1 to 4 : 1992

Reaffirmed 2002 : Voltage Transformers.

IS-5578 : 1984

Reaffirmed 2006 : Guide for marking of insulated conductors.

IS 4691 : 1985

Reaffirmed 2004 : Degree of Protection provided by enclosures

IS-11353 : 1985

Reaffirmed 2006

: Guide for uniform system of marking and identification of conductors

and apparatus terminals.

IS-6005 : 1988 : Code of practice for phosphating of iron and steel.

IS-4483 : 1968

Reaffirmed 2001

: Preferred panel cut out dimensions for electrical relays - flush

mounting IDMTL relays.

IS 13234 : 1992

Reaffirmed 2002

: Guide for Short-circuit Current Calculation in Three-phase A.C.

Systems

IS-1248 : 2003 : Direct acting indicating analogue electrical measuring instruments

and their accessories





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IS-2419 : 1979

Reaffirmed 2002

: Dimensions for panel mounting indicating and recording electrical

instruments

IS-4146 : 1983

Reaffirmed 2001

: Application guide for Voltage Transformers

IS-4201 : 1983

Reaffirmed 2001

: Application guide for Current Transformers

IS-4237 : 1982 : General Requirements for Switchgear and Control Gear for Voltages

not exceeding 1000V AC or 1200V DC

IS-4794 : 1985

Reaffirmed 2001

: Push Button Switches

IS-5082 : 1998

Reaffirmed 2003

: Wrought aluminium & aluminium alloy bars, rods, tubes and sections

for electrical purposes.

IS-6236 : 1971

Reaffirmed 2005

: Direct recording electrical measuring instruments.

IS 8623 : 1993

Reaffirmed 1998

: Specification for Low-Voltage Switchgear and Controlgear

Assemblies

IS-13703 Part-1: 1993

Reaffirmed 2004

: Low Voltage Fuses

IS 10118 : 1982

Reaffirmed 2006

: Code of Practice for Selection, Installation and Maintenance of

Switchgear and Controlgear

IS-11353 : 1985

Reaffirmed 2006

: Guide for uniform system of marking and identification of conductors

and apparatus terminals

IS 13947 Part-1 : 1993

Reaffirmed 2004

: Specification for Low-voltage Switchgear and Controlgear

IS 13947 Part-2 : 1993

Reaffirmed 2004

: Specification for Low-voltage Switchgear and Controlgear – Part 2 :

Circuit Breakers

IS 13947 Part-3 : 1993

Reaffirmed 2004


Switches, Disconnectors, Switch Disconnectors and Fuse

Combination Units

IS 13947 Part-4 : 1993

Reaffirmed 2004


Contactors and Motor-Starters – Section 1: Electromechanical

Contactors and Motor Starters

IS 13947 Part-5

(Section1) : 1993


Control Circuit Devices and Switching Elements – Section 1 :

Electromechanical Control Circuit Devices

IS 3043 : 1987 : Earthing

IEC 60947 : 2007 : Low Voltage Switchgear & Controlgear- Part 1 - General rules

IEC 60255 : Electrical Relays

IEC 61850 : Numerical Relays

IEC 62271-1 : 2008 : Common Specifications for High Voltage Switchgear and Control

Gear Standards

IEC 62271-200 : 2003 : AC Metal enclosed Switchgear and Control Gear for Rated Voltage

1kV and including 52kV





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IEC 62271-100 : 2007 : High Voltage Circuit Breakers.

IEC 60038 : 2003 : IEC standard Voltages

IEC 60059 : 2009 : IEC standard current ratings

IEEE C37.21 : 2005 : IEEE Standards for Control Switchboards

IEC 60439 : 2004 : Low voltage switchgear and control gear Assemblies Part 1: Type-

tested and partially type-tested assemblies.

IEEE 519 : 2004 : Recommended Practices & Requirements for Hazardous Control in

Electrical Power Systems

DC UPS : Battery, Battery Charger & DCDB system

IEC 60086 : 2006 : Batteries-General

IEC 60896 Part-2 : 1995 : General requirement & method of tests for Valve regulated type

batteries

BS 6290 Part-4 : 2007 : Specification for sealed Valve regulated Lead acid batteries

BS 6745 Part-1 : 1986 : Specification for performance, design and construction of valve

regulated sealed type batteries

IS 14901 Part-1 : 2001 : Essential Ratings and Characteristics of Semi-Conductor Devices.

IS 14901 Part-7 : 1970

Reaffirmed 2006

: Essential Ratings and Characteristics of Semi-Conductor Devices Part-

VII : Reverse Blocking Triode Thyristors

IS 14901 Part 1, 3 & 7 : Letter Symbols for Semi-Conductor Devices.

IS 3715 Part-4 : Letter Symbols for Semi-Conductor Devices : Part-IV - Thyristors.

IS 13947 Part-3 : 1993

Reaffirmed 1998


Switches, Disconnectors, Switch Disconnectors and Fuse Combination

Units.

IS 13947 : 1993

Reaffirmed 2004

: Specification for Low-voltage Switchgear and Controlgear - Part 1 :

General Rules

IS 1248 : 2003 : Direct Acting Indicating Analogue Electrical Measuring Instruments

and their Accessories

IS 13947 Part 1 : 1993

Reaffirmed 2004

: Degrees of protection provided by enclosures

IS- 3231 : 1986

Reaffirmed 1997

: Electrical Relays

Is 8623 : 1993

Reaffirmed 1998

: Factory built assemblies.





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IS- 13947 Part 4–Section 4:

1993 Reaffirmed 2004

: Specification for Low Voltage Switchgear and Controlgear Part 4 :

Contactors and Motor Starters.

IS- 13947 Part 3 : 1993

Reaffirmed 2004

: Control Switches and Push Button Stations

IS- 4540 : 1968

Reaffirmed 2001

: Semiconductor rectifier cells and stacks mono crystalline.





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Appendix -C: Requisition for Engineering Documents

RED Form

Owner’s Office Distribution Office


Viskaha Dispatch Station

VR-ATP Area, Naval Base Post

Visakhapatnam – 530 014

Mott MacDonald Consultants(I) Pvt. Ltd

Kothari House, CTS No. 185

Off Andheri – Kurla Road

Andheri ( East), Mumbai 400059, India

SPECIAL INSTRUCTIONS Prints Documents shall be sent to:

Production Schedule 5 The Purchasing Office via courier service

Manufacturing, inspection & testing sequence plan 5 The Purchasing Office via courier service

DRAWINGS Required number for TIMING FOR SUBMITTAL

OFFER APPROVAL FINAL - for approval 2 weeks after order date

Approval drawings / Final drawings to be submitted

under cover of an ADS form / FDS form respectively

Prints Prints Disk Prints - final issue 2 weeks after approval date

Documents shall be submitted to:

Submission of Following not limited to:

33kV Switchgear, LV Switchgear, Interface PLC:

Guaranteed Technical Particulars with values filled up 2 5 2 10

General Arrangement Drawing showing masses, Main

dimensions, arrangement of auxiliary components,

sectional details etc.

2 5 2 10

Name Plate Drawing - 5 2 10

Foundation Plan & Loading Details, Baseframe details,

floor cut-outs for Switchgears

2 5 2 10

Block Logic, Control Schematics, Soft starter, VFD

Schematics, Interface PLC block diagram &

Schematics & Connection diagrams

- 5 2 10

Busbar sizing Calculation, Termination diagram - 5 2 10

Bill of Material - 5 2 10

Single Line Diagram, feeder List 2 5 2 10

Make of Each Component, List of Makes 2 5 2 10

As built Drawings - 5 2 10

Purchasing Office via courier service

Battery, Battery Charger & DCDB system

Guaranteed Technical Particulars with values filled up 2 5 2 10

Brief Write up on D.C. System operation, List of

Alarms / Annunciation

- 5 2 10

General Arrangement Drawing showing plan, elevation

& typical section views, Particularly typical sections,

to illustrate cable connections.

2 5 2 10

Foundation Loading Plan showing fixing channels,

Floor openings etc. and max. depth/weight/shock

loading on foundation of panel

2 5 2 10

Bill of Materials for each equipment, D.C. System

Block Diagram

- 5 2 10

Main & Control Circuit Schematic Diagrams / Wiring

diagrams

- 5 2 10

Make of Each Components 2 5 2 10


SLD for DCDB, Battery drawings 2 5 2 10

Calculations:

� Battery Sizing Calculation

� Float Charger Sizing Calculation

� Float Cum Boost Charger Sizing Calculation

2 5 2 10 Purchasing Office via courier service

Backup documents/Graphs for calculations

Name Plate Drawing - 5 2 10





001.doc

Following documents to be submitted for supplied equipment within the

Major Electrical Equipment package

Type Test, Routine Test Certificates 2 5 2 10

Operating manuals, incorporating installation,

commissioning, operating & maintenance instructions

and fault finding procedures

5 2 10

Spares List for two Years Operation 2 5 2 10

As Built Drawing 5 2 10

SPARE PARTS DOCUMENTS 1 10

ESPIR forms including 1 transparency


TEST AND INSPECTION DOCUMENTS Prints

Documents to be submitted under transmittal Documents shall be submitted to:

Manufacturing report 2 10

Test Report / Data Curves, Inspection Test Plan, QA Plan 2 10

Inspection Test Plan 2 10

QA Plan 2 10

FAT Procedure 2 10

Calibration Certificates for testing Instruments. 2 10 Purchasing Office via courier service within 4

weeks

Bought out Equipments Certificates. 2 10 Of relevant test / inspection.

OPERATING DOCUMENTS Purchasing Office via courier service not later

than time of Dispatch of equipment.

Installation instructions 2 10

Operating instructions 2 10 Combine into one manual

Maintenance instructions 2 10

ADDITIONAL REQUIREMENTS

1. Referenced standards / codes shall be the latest issue unless otherwise stated.

REMARKS

Invoice must certify that the drawings and engineering documents specified

above have been dispatched to all parties concerned.

Any deviation from the timing for submittal of documents shall be notified

to the Approval / Distribution Offices by fax or E mail.

Shop fabrication shall not be started before the required approval drawings

have been released for construction by the party concerned, unless

otherwise stated on the "Approval Drawing Specification".

Each document shall bear the item / tag and order reference number and be

dispatched by air mail, unless other instructions are stated on the RED.

Units / dimensions to be used on Engineering documents shall be SI.

The documents shall be in English. Description on drawings and similar

documents may be in other languages provided English translations are

also given.

Drawings and documents shall be suitable for microfilming and comply

with accepted national or international standards for the preparation of

technical drawings. Only the following standard sizes should be used:

A4, A3, A2, and A1.





001.doc

Appendix - D: Specification for 33KV Switchgear

Refer Doc. No: 254625-300-SP-ELE-001 (Pages 1 to 15)



Doc No: 254625-300-SP-ELE 001 Rev: C Page 1 of 15

P:\Andheri\IndiaProject\254625 HPCL- Black Oil Terminal\Procurement\Switchgear\04.09.09\PDF\33kV Swgr\254625-300-

SP-ELE 001.doc

APPENDIX - D

SPECIFICATION FOR 33kV

SWITCHGEAR





SP-ELE 001.doc


1 Scope .................................................................................................................................. 3

2 Technical Specification ...................................................................................................... 3

2.1 Construction ....................................................................................................................... 3

2.2 Busbars ............................................................................................................................... 5

2.3 Circuit Breaker ................................................................................................................... 5

2.4 Relays ................................................................................................................................. 7

2.5 Measuring Instruments (Digital Multifunction Meter) & Analog Meters.......................... 7

2.6 Current Transformers ......................................................................................................... 8

2.7 Potential Transformers ....................................................................................................... 9

2.8 Control Supply ................................................................................................................... 9

2.9 Control Switches .............................................................................................................. 10

2.10 Control Fuses.................................................................................................................... 10

2.11 Push Buttons..................................................................................................................... 10

2.12 Indicating Lamps .............................................................................................................. 10

2.13 Space Heaters, Illumination and Socket........................................................................... 11

2.14 Common Alarm Scheme .................................................................................................. 11

2.15 Wiring and Identification ................................................................................................. 11

2.16 Earthing ............................................................................................................................ 12

2.17 Cable Termination............................................................................................................ 12

2.18 Interface Requirement ...................................................................................................... 13

Attachment-1: Table of Compliance ............................................................................................ 14

Attachment-2: Guaranteed Technical Particulars......................................................................... 15





SP-ELE 001.doc

1 Scope

1.1 This specification intended to cover Design, Engineering, Manufacturing, Assembly, Painting,

Inspection, Testing at manufacturer’s works, supply & Delivery to site inclusive of packing &

transportation, testing and commissioning at site of 33kV switchgear as per single line diagram

and enclosed in appendices.

1.2 This specification shall be read in conjunction with Specification for Major Electrical

Equipments. [Specification no: 254625-300-RQ-ELE-001]

1.3 Quantity of switchboard is as indicated in Main Specification No.: 254625-300-RQ-ELE-001 i.e.

Specification for Major Electrical Equipments.

1.4 The scope of work also includes testing and commissioning of the equipment supplied.

1.5 All equipment supplied shall be new and best of their respective kinds and shall be of the class

most suitable for the purpose for which they are intended.

1.6 Modification of schemes/changes in components, if any suggested during scrutiny/approval of

drawings and execution of work, shall be carried out by successful contractor at no extra cost.

1.7 The scope of Contractor includes all associated items / sensors / interlocks required for smooth

and efficient working of system and required during installation, testing & commissioning. All

such items are deemed to have been included in the contractor’s scope.

1.8 Safety interlocks, necessary to ensure maintenance operation shall be provided.

2 Technical Specification

2.1 Construction

The general constructional features of 33kV Switchgear shall incorporate the following as a

minimum:

2.1.1 The switchboard shall be metal enclosed, fully drawout, free standing, dust and vermin proof,

totally enclosed, fully compartmentalised, floor mounted type. The circuit breaker panels shall

be drawout, multi-compartmental unit type with min. IP-4X degree of protection. The unit shall

be robust design to withstand the stresses encountered in the event of an electrical fault.

2.1.2 Adequate lifting facilities such as hooks for ease of handling at site shall be provided. These

hooks when removed shall not leave any openings in the switchgear.

2.1.3 Front / Rear access shall be available to all components in cubicle which requires adjustment,

maintenance or replacement.

2.1.4 Rear access shall be available to all cable boxes and glands and multi-core terminal blocks. Rear

side of cable chamber shall be provided with shrouds/segregation plates of non-flammable

material, with high voltage danger notice board. It shall be possible to remove & install these

shrouds/segregation plates after cables have been terminated.

2.1.5 The individual panels shall comprise two main portions, i.e. the fixed and the moving portion.

Fixed portion shall house busbars, current transformers, relays and instruments. Moving portion

shall be circuit breaker. The busbar chamber shall be completely segregated from the rest of the

panel. The busbars shall be suitably sized and supported on insulators of suitable grade and shall

be brazed to withstand the fault level specified. The connection between the busbars and the

terminals of the circuit breakers shall be suitably shrouded. Similarly, all Busbar joints shall be

shrouded.

2.1.6 Each unit of switchgear shall have necessary interior sheet metal barriers to form separate

compartments for buses, switching devices, entering cable connections, etc. Each compartment





SP-ELE 001.doc

must be constructed and segregated to confine the damage caused by an internal fault to that

compartment.

2.1.7 Automatic safety shutters shall be provided to shroud bus side and cable side main disconnecting

contacts of the circuit breaker when the circuit breaker is taken to test position. The shutters shall

have Caution Label.

2.1.8 In addition, caution board shall be provided on the vertical face separating circuit breaker

compartment with other compartments. Current transformer shall be provided on the cable side

of circuit breaker.

2.1.9 The instrument / control chamber shall incorporate the indicating instruments, lamps and

components of the control circuit. The instrument chamber shall be provided with a separate

door which can be opened when the circuit breaker is ‘ON’. The instrument chamber shall also

be totally segregated from the rest of the panel. Wherever equipments are mounted on the door,

the wiring shall be with flexible wires. The wires shall be neatly bunched and clamped and shall

be sufficiently long so that the door can be opened without causing unnecessary stress on the

terminations at the instruments. All instrument and relays belonging to one panel shall be

mounted on the same panel. In case of shortage of space, rear instrument panel above cable

chamber can be utilised.

2.1.10 All barriers shall be of non inflammable material.

2.1.11 Doors of all switchgears shall be gasketed to prevent entry of vermin and dust. No opening

should be left. Steel screws, bolts and washers shall be plated.

2.1.12 Adequate packaging against damage / deterioration shall be provided for transportation to site

and subsequent storage prior to reassembly. Each panel after packing shall be identified with

details of panel by indelible ink.

2.1.13 Vendor shall take necessary measures to comply internal arc classification as per IEC 62271-

200.

2.1.14 The height of the panel throughout the length shall be uniform.

2.1.15 Cable compartment

This compartment shall be accessible from the rear of the cubicle and designed to accommodate

the following equipment:

• Current Transformers.

• Voltage Transformers.

• Earth Switch.

• Cable-end Boxes. Cable box shall be suitable for the cable sizes as mentioned in the

enclosed SLD.

• The normal arrangement of the cubicle shall be for cable entry from below the cable

boxes being fitted at floor level.

2.1.16 Low Voltage Compartment

In order to accommodate the protection relays, control and indicating equipment a separate

compartment in the upper part of the cubicle front shall be provided.

All indicating equipment such as relays, ammeters etc. shall be mounted on the front door.

Auxiliary relays, fuses, CT terminals, MCB’s etc. shall be mounted and wired in the LV

compartment.





SP-ELE 001.doc

Auxiliary contactors / relays / terminals shall be suitable for mounting on DIN rail. Separate

terminal blocks shall be considered for “Closing signals”, Tripping Signals”, “Auxiliary

Contacts”, mA Signals (if any)” etc.

2.1.17 Base Frame

Switchgears shall be provided with integral base frame which shall be bolted/welded on the

cross members provided by owner. Base channel of height 75mm shall be provided. Amply

dimensioned oblong holes shall be provided on the base frame. The base frame shall be of

standard sections, re-rolled sections will not be acceptable. Vendor shall give base frame details

in foundation drawing. Foundation on which base frame is mounted is excluded from Vendor’s

Scope of supply. Vendor shall provide the dummy panel wherever the floor beam fouls with

cable entry. Requirement of Dummy panel will be confirmed later. Vendor shall provide the Unit

Rate of dummy panel.

2.2 Busbars

2.2.1 All busbars and their main current carrying connections shall have the same sectional area

throughout their length, Busbars shall be sized to continuously carry the rated current without

exceeding the final temperature of 95°C and the same shall be capable of withstanding the full

fault level without any deformation. The continuous current rating of busbars shall be as per

Single Line Diagram. Busbars shall be of Aluminium with proper plating at joints. The busbars

shall be provided with cast epoxy sleeving or nylon film of suitable insulation class throughout

their lengths and vertical droppers and colour coded. Joints in busbars shall be provided with

shrouds. For long busbars, suitable expansion joints shall be provided.

2.2.2 The busbars shall be supported by epoxy resin cast insulators with suitable Creepage distance &

capable to withstand the specified fault level. The clearance between live parts and the earth

shall be as per the IS.

2.2.3 Busbars and connections shall be secured in such a manner that the insulators are not subjected

to bending forces under short circuit conditions. Dynamic stresses shall be calculated on the

basis of peak short circuit current.

2.2.4 The vertical droppers shall be sized to carry continuously at least the rated current of the

connected circuit breaker.

2.2.5 Thermal design of the busbars shall be based on installation of the switchgear in poorly

ventilated conditions. The cooling air volume shall take into account only the bus enclosure.

2.3 Circuit Breaker

2.3.1 Circuit breaker shall be VCB/SF6 type & shall be triple pole arranged for motor operated spring

charged, independent closing and shunt tripping from suitable voltage from battery. The close /

trip control switch shall be interlocked to trip before close. The closing and tripping circuits shall

be self-opening on completion of their respective functions irrespective of the position of the

control switch.

2.3.2 Mechanical OFF push actuators shall be provided on breaker mechanism door. This shall be

operable without the need to open panel door.

2.3.3 All operating mechanism shall be designed to give trouble free service over extended periods

and shall not require attention more often than every 1000 operations or once a year, whichever

is the shorter period. Each breaker shall be fitted with operation counter reading at least up to

999 figures.

2.3.4 A visual ON / OFF indicator shall be provided positively coupled to the operating mechanism.

This indicator shall be visible through a glass window from the front with the cubicle door

closed.





SP-ELE 001.doc

2.3.5 The circuit breaker shall have facility to charge the spring manually and close the breaker in the

event of failure of motor / control supply to motor. The spring charging motor shall start after

closing of breaker and not after opening of breaker. In case the limit switch fails to cut out the

spring charging motor when the springs are fully charged, the motor shall be automatically de-

coupled and annunciation for this shall be provided. Mechanical indication for spring charged /

discharged shall be provided.

2.3.6 SF6 breaker shall be provided with the gas density monitoring device and necessary interlock

alarm facilities.

2.3.7 Manual closing devices shall also be provided.

2.3.8 Mechanism shall be trip free and shall have antipumping facilities.

2.3.9 Each circuit breaker shall have necessary auxiliary contacts for indication, protection,

interlocking supervision, metering and other purposes. Minimum 4 ‘NO’ + 4 ‘NC’ shall be

provided for owner's exclusive use. All spare contacts shall be wired up to the terminal blocks.

All contacts shall be positively operated by main apparatus and all contacts shall be adequate to

make, carry and interrupt the currents in their circuits. Auxiliary relay shall be used to multiply

contacts. Service position contact of circuit breaker shall be used for the multiplying relay. The

shunt trip of the circuit breaker shall be wired through an advanced `NO' contact which shall

make before the main contact close.

2.3.10 Mechanical / Electrical interlocks shall be provided to prevent mal-operation and in particular to

ensure the following. All these interlocks shall be ensured irrespective of type of switchgear viz.

SF6, VCB or VC.

(a) The breaker can be operated only if it is in service or in test position.

(b) Movement of the circuit breaker truck from service to test or test to isolated position OR

in reverse order shall be possible only when circuit breaker is off.

(c) In the operating positions of the breaker, the circuit breaker shall be securely locked. It

can be withdrawn or inserted only with appropriate operations of the interlocking levers.

(d) The operating lever facilitates to overcome the contact pressure at the main

disconnecting contacts while pushing in or drawing out.

(e) Test to isolated position of circuit breaker can be achieved only when the control plug is

removed.

(f) Isolated to test position of circuit breaker can be achieved only after inserting control

plug.

(g) It shall not be possible to withdraw the breaker when it is in closed position.

(h) It shall not be possible to plug in a breaker with earthing switch closed.

(i) It shall not be possible to close the earthing switch with breaker plugged in.

(j) For Grid Incomer Circuit Breakers, it shall not be possible to close the earthing switch

with upstream GOD (Group operating device/Isolator) in close position.

(k) Pulling out of auxiliary circuit plug with breaker in service position shall not be

possible.

(l) Pushing in breaker to service position with auxiliary circuit plug not in position shall not

be possible.

(m) Opening of compartment door with isolating switch in ON position and vice versa shall

not be possible.





SP-ELE 001.doc

2.3.11 Breaker operating duty shall be O-0.3sec-CO-3min-CO. Breakers shall be suitable for auto

reacceleration / reclosure duty.

2.3.12 All the non-conducting metal parts of the circuit breaker truck shall be bonded together and shall

make perfect electrical connections to earth through substantial sliding contacts, at service and

test positions. Such sliding contacts shall be arranged to make before power plug-in and

interrupt after power drawout.

2.3.13 Arc extinguishing devices shall be easily removable for routine inspection of fixed contact

assemblies.

2.3.14 The mating contacts of the circuit breaker with busbar contact shall be provided with removable

shrouds.

2.4 Relays

2.4.1 All relays shall be microprocessor based, Numerical Protection relays with communication

facility.

2.4.2 All relays specified shall be flush mounted in dust proof cases and shall match the appearance of

the instruments mounted on the same panel. Relay covers shall be of non-ignitable materials.

2.4.3 Breaker auxiliary contacts shall be wired up to numerical relay for status record.

2.4.4 Protective relays shall be withdrawable type. Trip circuits shall be automatically broken and

current transformer secondary circuits shorted, when a relay is withdrawn from its case. A

marking strip shall be provided in front of each terminal block and a diagram plate at the back of

each case to identify connections.

2.4.5 Relay contacts shall withstand repeated operation and shall make or break the maximum currents

in their circuits without deterioration. All spare contacts shall also be wired up to the external

terminals.

2.4.6 Relay coils shall carry their normal currents indefinitely and such currents as can occur under

fault conditions. Relay mechanisms shall not be affected by vibration or magnetic fields, which

may occur in normal operation.

2.4.7 Auxiliary relays in tripping circuits shall have mechanically operated flag indications and shall

be hand reset type. Indicators shall be capable of being reset without opening the relay case. It

shall not be possible to operate any relay by hand or to alter its setting, without opening the case.

For relays with combined functions such as inverse time and instantaneous trip, separate

indications of each function as specified shall be provided.

2.4.8 Master tripping relay (lock-out relays) shall be of the hand / electrical reset type with self coil

cut off contacts and shall have at least 2 ‘NO’ + 2 ‘NC’ spare contacts for owner’s exclusive use.

Necessary multiplication by auxiliary relay shall be done.

2.4.9 Provision shall be made for insertion of test plug at the front for testing and calibration using

external source of power without disconnecting permanent wiring. Test plugs shall permit the

shorting of any current transformer circuits.

2.4.10 Auxiliary relays on which the function of a contact may be changed from ‘NO’ to ‘NC’ and vice-

versa by simply changing the contact arrangement are preferred.

2.5 Measuring Instruments (Digital Multifunction Meter) & Analog Meters

2.5.1 All measuring and recording instruments shall be digital, flush mounting type, with

communication facility.

2.5.2 Digital metering unit shall be provided for incoming & outgoing feeders as per SLD. The digital

metering unit shall have provision to display the following :





SP-ELE 001.doc

• Phase and line voltage

• Phase currents

• kVA, kW, kVAR, kVARH, kVAH and kWH

• Power factor

• Frequency, Total harmonics

• Alarm output relay

2.5.3 3 Phase analogue ammeter shall be provided for feeders and voltmeters shall be provided in PT

panels, as per SLD.

2.5.4 All auxiliary equipment such as shunts, transducers, CT’s and PT’s that are required shall be

included in the scope of supply.

2.5.5 All indicating instruments and meters shall be capable of carrying continuously their full load

currents and full voltage across their voltage coils. They shall not be damaged by the passage of

fault currents or the existence of over voltage on the primary side of their instrument

transformers for the maximum permitted duration of fault conditions which may occur during

normal operation. All instruments and meters shall be back connected. Meters shall be provided

with zero adjusting devices for external operation.

2.5.6 Indicating instruments shall be of 96sqmm type flush mounted having 90° full scale movement.

2.5.7 Class of accuracy shall be 1 and 1.5 for Ammeter and Voltmeter respectively.

2.6 Current Transformers

2.6.1 Current transformers shall be cast resin bar primary type with the secondary terminals housed in

a terminal box. The burden, ratio and class of accuracy shall be as given in the SLD. However,

current transformers shall have sufficient capacity to operate with the burden imposed by the

devices shown on drawings within their accuracy classifications.

2.6.2 Unless otherwise specified the CT shall meet following requirements :

(a) Separate cores shall be used for metering and protection.

(b) If a metering load is fed from a protection CT, suitable 1/1 or 5/5 ratio, saturated

interposing CT’s shall be used.

2.6.3 Current transformers shall be mounted in stationary part of switchgear.

2.6.4 These shall be capable of withstanding dynamic and thermal stresses originated by short circuit

fault current for withstand time of the board.

2.6.5 Test terminal blocks shall be provided for each CT circuit.

2.6.6 CT terminal block shall be provided with shorting and disconnecting type links & terminals shall

be suitable for termination of 4sq.mm cable.

2.6.7 Unless otherwise required for proper relaying one side of current transformer secondary shall be

grounded in the compartment with the meters or relays which they serve and each current

transformer group shall be grounded with a separate identified lead which may be disconnected

for testing.

2.6.8 CT secondary terminals shall be provided with plastic covers to prevent inadvertent contact.

2.6.9 CT circuits to have provision for remote metering in all the phases for all meters.

2.6.10 CT sizing shall be verified by vendor, based on relay make & relay manufacturers

recommendation.





SP-ELE 001.doc

2.7 Potential Transformers

2.7.1 The PT's shall be epoxy cast resin type. The burden and ratio and class of accuracy shall be as

specified in SLD. Generally, PT shall have specified accuracy class from 10% to 120% of

normal voltage. However, potential transformers shall have sufficient capacity to operate with

the burden imposed by the devices shown on the drawing with their accuracy classification.

2.7.2 All PT's shall be drawout type and connections between the busbars and PT shall be completely

shrouded. Automatic shutter shall be provided to shroud the busbars when PT is taken out.

2.7.3 It shall be possible to remove potential transformer from the circuit breaker, whenever required.

2.7.4 HRC fuse protection shall be provided on primary. Secondary shall be provided with a 4 pole

MCB.

2.7.5 Plug-in type test terminal blocks shall be provided for each PT circuit.

2.7.6 Unless otherwise specified for proper relaying one side of potential transformer secondary shall

be grounded at the transformer and the ground connection shall be identified and removable for

testing.

2.7.7 The primary rated voltage shall be equal to the rated voltage Vn of the system or Vn/ √3 if the

voltage transformer is connected between phase and neutral. If not otherwise specified

secondary voltage shall be 110V or 110/ √3V.

2.7.8 Line PT for each incomer shall be sized for 110V metering and protection requirement.

2.7.9 Selection and sizing of PT shall be verified by vendor based on relay make.

2.8 Control Supply

2.8.1 Control supply for CB shall be 110V D.C.

2.8.2 110V DC control supply from Battery Charger shall be provided for tripping and closing circuits

of circuit breakers. 240V AC control supply shall be provided for spring charging motor,

auxiliary power and heater circuits. Vendor shall provide suitable control switch and fuse at the

point of receiving control supply. Vendor shall be required to loop both these supply to all the

panels forming one unit. Any other intermediate voltage required in the panel shall be derived by

providing suitable control transformer.

2.8.3 Control Circuits

• The equipment shall be designed in accordance with IS/IEC standard recommendations to

operate with an over voltage up to 10% and under voltage up to 15% except for the

tripping and closing circuits.

• The tripping circuit allows an operation with 70% to 110% of rated DC Auxiliary voltage

supply; the closing circuit allows an operation with 85% to 110% of rated DC or AC

Auxiliary voltage supply.

• For the protection of the different circuits such as control voltage supply charging motor,

heater etc., where applicable MCB’s shall be provided individually for each cubicle

circuit.

• For receiving and distributing AC and DC power for control circuit suitably rated 2 pole

MCB’s to be considered.

• “MCB Off” indicating lamp to be considered in case of MCB (DC) is “OFF”

2.8.4 Two number control supply feeders shall be provided for each switchgear. Suitable control

supply monitoring & selection scheme shall be developed by vendor.





SP-ELE 001.doc

2.8.5 Two number 240V AC supply feeder shall be provided for feeding space heaters, etc. Suitable

AC control supply monitoring & selection scheme shall be developed by vendor.

2.9 Control Switches

2.9.1 Each circuit breaker shall be provided with trip-neutral-close (T-N-C) control switch and local

remote selector switch.

2.9.2 All circuit breaker operating switches shall be of the pistol grip type, spring return to neutral and

lockable in neutral position. They shall be arranged to close the breaker by being turned

clockwise. The trip, neutral and close positions shall be clearly indicated. The movement shall

be such that the switch cannot be operated inadvertently and that it is mechanically interlocked

to trip before close. The operating switch shall be located on the centre line at about 1.5 meters

from the floor level. Two spare ways shall be provided on these switches.

2.9.3 Ammeter selector switches shall have `make` before break feature on its contacts. The selector

switch shall generally have four positions for reading three phase currents and the neutral

current.

2.9.4 The voltmeter selector switch shall also have four positions. Three shall be used to measure

phase to phase voltages and the fourth shall be ‘OFF’ position.

2.9.5 Based on operational philosophy, if required, Auto / Manual selector switch shall be provided.

2.10 Control Fuses

2.10.1 All control fuses shall be of ‘link’ type. Screw type ‘diazed’ fuses are not acceptable. Fuses

shall generally be mounted on the upper half of the panel. All fuse links shall have HRC

cartridges. Rewirable fuses are not acceptable. All fuses and links shall be provided with

suitable label.

2.11 Push Buttons

2.11.1 Push button colours shall be as follows:

Stop, Open, Emergency - Red

Start-Close - Green

Trip circuit `Healthy check' - Black

Alarm Reset - Yellow

Lamp Test - Green

Red push buttons shall be on the left side and green push buttons on the right side.

2.12 Indicating Lamps

2.12.1 Indicating lamps shall be provided on breaker panel as per the SLD. The indicating lamps shall

be of LED type having low voltage glow protection. The covers of the lamps shall be heat

resistant.

2.12.2 Indicating lamps colours shall be as follows:

Running / ON - Red

Stop / OFF - Green

Fault / Auto Trip - Amber





SP-ELE 001.doc

Trip Coil ‘Healthy’ - White

Spring Charged - Blue

Breaker in Service - Blue

Control Power “Healthy” - White

DC Failure - Red

2.13 Space Heaters, Illumination and Socket

2.13.1 Panels shall be provided with 240V, 1 Phase AC supply power 2 pole MCB and shall have

compact fluorescent light fitting for internal illuminating with door switch.

2.13.2 240V, 15A, SPN Industrial socket outlet, complete with MCB & earth-leakage protection shall

be provided in each cubicle for hand lamp connection.

2.13.3 The cubicles shall be provided with space heaters to prevent moisture condensation and maintain

cubicle temperature 5o C above the ambient. The space heaters shall be located at the bottom of

the switchboards and shall be controlled through a thermostat with an adjustable setting, a

manually operated switch. The thermostat shall preferably be located in the metering / relay

chamber.

2.14 Common Alarm Scheme

2.14.1 33kV Switchgear panel shall be provided with microprocessor based annunciator unit with

Audio-visual alarm, & Test / Accept / Reset push buttons.

2.14.2 No. of windows of annunciator shall be decided based on number of alarm contacts to be wired

with 20% spare windows.

2.14.3 Annunciator shall have facility for repeat annunciation at remote location.

2.15 Wiring and Identification

2.15.1 All control signalling, protection and metering wiring shall be by PVC insulated, 660 Volt grade

and copper stranded conductor wires of min. 1.5 Sq.mm. For CT secondary circuit wires of 2.5

Sq.mm copper conductor min. shall be used. Wiring shall run in enclosed channel and shall leave

at least 25% spare space for future use. Wires for connection between moving parts shall be

flexible stranded copper conductors and the same shall be soldered at the ends before

connections are made.

2.15.2 Terminal strips for connecting incoming control cables shall be channel mounted type of

adequate size and shall be located conveniently for easy accessibility, without danger of contact

with live part, ease of connection and shall be separated by barriers from power circuits. At least

20% spare terminals shall be provided in each terminal strips. CT secondary lead terminals shall

be provided with shorting links.

2.15.3 All spare contacts of auxiliary relays, timers etc. shall be wired up to terminals block. Terminal

Block shall be 600V grade 10 Amps rated.

2.15.4 Sufficient terminals shall be provided on each terminal strip to ensure that not more than one

outgoing wire is connected per terminal. The wire shall be identified by numbered ferrules at

each end, in accordance with the connection diagram. All ferrules shall be made of non-

deteriorating materials. The ferrules shall be firmly located on each wire so that they cannot

move or turn freely on the wire.

2.15.5 All interpanel control wiring shall be done by the switchgear vendor. The interpanel wiring

shall be taken through PVC sleeves or suitable rubber grommets. Multipin plug provided should

have scraping earth terminal.





SP-ELE 001.doc

2.15.6 Each panel shall be provided with sufficient number of test terminal blocks and test plugs for

testing relays and kWh refers. The control circuit shall be designed for power frequency

withstand voltage of 2kV (SMS) for 1 minute.

2.16 Earthing

2.16.1 Common earthing trolley shall be provided for all the circuit breakers. This shall be installed in

cable compartment. Necessary interlocks between earthing trolley & circuit breaker shall be

provided.

2.16.2 An earth bus of at least 50 mm x 10 mm Aluminium shall be provided. The earth bus shall be

electrically continuous and shall run the full extent of each board. The earth bus shall be of

same material as the main busbars. Each unit shall be constructed to ensure satisfactory

electrical continuity between all metal parts not intended to be live and the earth terminals of the

unit.

2.16.3 At each end of switchgear, suitable slots shall be provided on main earth bus for connection to

Owner's Earth. The earth bus shall be accessible in each cable compartment either directly or

through a branch extension to ground the cable armour and shields.

2.16.4 All doors and movable parts shall be connected to the earth bus with flexible copper

connections. All non-current carrying metallic parts of the equipment shall be earthed. Earth

bus shall be brought back to cable compartment and earthing bolts shall be provided to ground

cable armours.

2.16.5 Circuit Breaker truck shall be provided with scrapping earth.

2.17 Cable Termination

2.17.1 MV Cable

(a) 33kV switchgear will be connected to transformers or other equipment by XLPE cables.

All power and control cables shall enter the switchgear from bottom. Sufficient space

and support arrangement shall be provided in the cubicles to accommodate cables. The

number of cables per circuit sizes and types shall be as per SLD. If the required number

of cable terminals cannot be accommodated in the circuit breaker chamber, adaptor

panel at the rear with bus extension suitable for the number of cables to be terminated

shall be provided.

(b) The cable sockets shall be at such angle that the cable tails may be brought up for

termination with minimum bending and setting.

(c) Terminals shall be located sufficiently away from gland plates or cable boxes to

facilitate easy connection. Minimum distance between gland plate and termination shall

be 800 mm. If distance is not sufficient, adaptor panels shall be provided. Additional

termination points shall be provided in the outgoing bus links for power factor

correction capacitor cable termination.

(d) Whenever extension box on Panels are provided, earth strip shall also be extended. In

lieu of rear extension, a dummy panel may be provided for connecting cables.

(e) The switchboard shall be supplied complete with supports for clamping outgoing and

incoming cables. Terminal blocks shall not be used to support cables.

2.17.2 Control Cables

Control cables will enter the switchgear from the Bottom. Adequate space shall be provided for

termination. Supporting facilities shall be provided for clamping the control cables.





SP-ELE 001.doc

2.18 Interface Requirement

2.18.1 Alarm and indication signals to plant Instrument control system (TAS) shall be potential free

contacts. These contacts shall be wired to terminals for external connections. The list of signals

required for indications to TAS for each circuit breaker are as follows:

Sr.

No. Description

Alarm

(Contacts)

Indication

(Contacts) Remarks

1 33kV Circuit Breaker-Open - 1 -

2 33kV Circuit Breaker-Closed - 1 -

3 33kV Circuit Breaker -Faulty 1 - -

4 Incomer Faulty 1 - Under voltage

relay operated

2.18.2 All parameters from Multi function meter to TAS.

2.18.3 Additional 2 Nos. Auxiliary Contactors to be provided for Interlocks.





SP-ELE 001.doc

Attachment-1: Table of Compliance



CLIENT :



VENDOR REF.

Spec. Clause

No.

Conforms

Yes/No

Alternative


1

2

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

2.10

2.11

2.12

2.13

2.14

2.15

2.16

2.17

2.18

Attachment 1:

Attachment 2:

Attachment 3:





SP-ELE 001.doc

Attachment-2: Guaranteed Technical Particulars

[Doc. No. 254625-300-DS-ELE-002 [Sheets 1 to 4]



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002.doc

Guaranteed Technical Particulars (To be filled in by the Vendor)

Note: Vendor shall submit guaranteed technical particulars separately for following 33kV switchgear:

Item No. Description Specification

1.0 General

1.1 Manufacturer

1.2 Country of Manufacturer

1.3 Type reference

1.4 Switchgear Designation

1.5 Applicable Codes and Standards

1.6 Installations

1.7 Overall Dimensions & Maximum Weight

1.8 IAC classification for switchgear [as per latest IEC 62271-

200]

1.9 Testing Authority

1.10 Type test certificate furnished Yes/No

2.0 Busbars

2.1 Rated Voltage kV

2.2 Rated current of main busbars at design Temp.of 500 C A

2.3 Number of phases Nos.

2.4 Short time withstand current for Busbars for 3 sec kA

2.5 Material of Busbars

2.6 Type of Busbars Sleeving

2.7 Shrouds on joints Yes/No

2.8 Cross sectional area of busbars Sq.mm

2.9 Maximum temperature rise over design temp

2.10 Clearance in Air

2.11 Location of Busbars

2.12 Earth busbar material & size

3.0 Circuit Breakers

3.1 Make & Type Designation

3.2 Highest System Voltage kV

3.3 No. of Poles

3.4 Rated Frequency Hz

3.5 Rated Current of circuit breaker A





002.doc

3.6 Short time Withstand Current

a) 1 s kA

b) 3 s kA

3.7 Peak Withstand Current kA

3.8 Power Frequency Withstand Voltage kV

3.9 Lightning Impulse Withstand Voltage kV

a) Interrupting medium for circuit breaker

b) Insulation medium for Switchgear

3.10 Rated operating duty cycle of circuit breaker

3.11 Opening time for Circuit breaker ms

3.12 Independent hinged type lockable door provided for each

cubicle

Yes/No

3.13 Rated short circuit breaking current for circuit breaker

a) Symmetrical rms.kA

b) DC Component %

3.14 Rated short circuit making current (peak) kA

3.15 Total Closing / Opening time sec

3.16 Method of closing

3.17 Method of tripping

3.18 Is the breaker trip-free? Yes/No

3.19 Electrical antipumping feature provided Yes/No

3.20 Over voltages developed during current interruption

a) Breaker

b) Surge suppressors provided to limit over voltages Yes/No

3.21 Maximum temperature rise over specified ambient temp.

3.22 Spring charge motor provided for CB Yes/No

3.23 Spring charging starts after breaker closing OR tripping

3.24 Time required to charge spring from fully discharged

condition

3.25 Control Supply voltage considered [Ref SLD] V

3.26 Power Consumption at Control Supply:

a) Maximum tripping coil consumption / CB VA

b) Maximum closing coil consumption / CB VA

c) Spring Charging Motor / CB W

4.0 Whether following are provided as per Specification &

SLD

Yes/No

4.1 Referred SLD Number

4.2 Indicating/measuring instruments

4.3 Current transformers





002.doc

4.4 Voltage transformers

4.5 Auxiliary contacts

4.6 Busbar earthing facility provided with necessary electrical

and mechanical interlocks

4.7 Interlock system

(a) between earth switch & main breaker

(b) between incomer cable side earth switch and sending

end breaker

4.8 Selector / control switches / push buttons

4.9 Protection Relays

4.10 Auxiliary Relays

4.11 Lock-out Relays

4.12 Trip Circuit Supervision Relays

4.13 Portable Earthing equipment (if required)

4.14 Service/test/earthed position switches

4.15 Emergency mechanical trip push-button

4.16 Operation counters

4.17 Hours run counters

4.18 Cable side earthing switch

4.19 Type of Busbar earthing system offered

4.20 Tools & Tackles

4.21 Installation accessories

4.22 Spare parts

4.23 Stabilising resistors

4.24 20% additional terminals

4.25 Test terminal blocks

4.26 All components & connections for DCS

4.27 All components & connections for synchronising panel.

5.0 Protections

5.1 Make

5.2 Type Designation

5.3 Setting Range

6.0 Current Transformers

6.1 Manufacture Name

6.2 Country of Manufacture


6.4 Standards to with CT conforms

6.5 Type of CT mounting / location

7.0 Potential Transformers

7.1 Manufacture Name

7.2 Country of Manufacture





002.doc


7.4 Standards to with PT conforms

7.5 Type of PT mounting / location

8.0 Internal wiring

8.1 Conductor size

8.2 Solid/Stranded

9.0 Paint shade

9.1 Inside

9.2 Outside

10.0 Miscellaneous

10.1 Degree of protection

10.2 Heat Load for HVAC Watts

10.3 110V DC Control Supply continuous Load of total

Switchgear for all buses.

VA

10.4 Foundation fixing accessories provided Yes/No

10.5 Material & thickness of gland plates mm

10.6 Minimum Distance between Gland Plate & termination

point

mm



Doc No:254625-300-RQ-ELE-001 Rev: C Page 23 of 26


001.doc

Appendix - E: Specification for LV Switchgear




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SP-ELE-003.doc

APPENDIX - E

SPECIFICATION FOR LV SWITCHGEAR





SP-ELE-003.doc


1.0 Scope .................................................................................................................................... 4

2.0 Operating Philosophy ........................................................................................................... 5

3.0 Technical Specification ........................................................................................................ 6

3.1. Motor Feeder Requirement................................................................................................... 6

3.2. Construction of Switchgears................................................................................................. 7

3.3. Busbars ................................................................................................................................. 8

3.4. Air Circuit Breakers (ACB).................................................................................................. 9

3.5. Switch fuse Unit ................................................................................................................. 10

3.6. Moulded Case Circuit Breakers (MCCB) & Motor Protection Circuit Breaker (MPCB).. 11

3.7. Contactors ........................................................................................................................... 11

3.8. Relays & Timers ................................................................................................................. 12

3.9. Control Switches, Indication Lamps, Push Buttons & Control Fuses ................................ 13

3.10. Indicating Instruments & Meters ........................................................................................ 14

3.11. Current Transformers.......................................................................................................... 14

3.12. Potential Transformers........................................................................................................ 15

3.13. Wiring and Identification.................................................................................................... 15

3.14. Control Supply.................................................................................................................... 16

3.15. Space Heaters and Cubicle Illumination............................................................................. 17

3.16. Earthing............................................................................................................................... 17

3.17. Busduct Terminations ......................................................................................................... 18

3.18. Cable Entry and Terminations ............................................................................................ 18

3.19. Soft Starter .......................................................................................................................... 18

3.20. Variable Frequency Drive (VFD) Unit ............................................................................... 20

4.0 MCC Interface PLC Panel .................................................................................................. 23

4.1. General................................................................................................................................ 23

4.2. Operating Philosophy of Group VFD................................................................................. 25

4.2.1 Function of TAS PLC............................................................................................25

4.2.2 Function of INTERFACE PLC .............................................................................25

4.3. Construction........................................................................................................................ 27

4.4. Processor............................................................................................................................. 28

4.5. Input/Output Modules......................................................................................................... 28





SP-ELE-003.doc

4.6. Power Supply module......................................................................................................... 29

4.7. Communication module..................................................................................................... 30

4.8. Spares.................................................................................................................................. 30

4.9. Self Diagnostic.................................................................................................................... 30

4.10. System Configuration: ........................................................................................................ 30

4.11. Wiring & Terminations for PLC......................................................................................... 31

Attachment – 1 : Table of Compliance...................................................................................... 32

Attachment – 2 : Guaranteed Technical Particulars................................................................. 34





SP-ELE-003.doc

1.0 Scope

Inclusion:

1.1 This specification intended to cover Design, engineering, Manufacturing, Assembly, system

integration, Painting, Inspection, Testing at manufacturer’s works, and Delivery to site inclusive

of packing & transportation, testing and commissioning at site of LV Switchgear as per single

line diagram and enclosed in appendices.

1.2 This specification shall be read in conjunction with Specification for Major Electrical

Equipment. [Specification no: 254625-300-RQ-ELE-001].

1.3 Quantity of Switchboards is as indicated in Main specification No.: 254625-300-RQ-ELE-001

i.e. Specification for Major Electrical Equipment.

1.4 The different mechanical equipment for which the VFD / Soft Starters / DOL/Star Delta feeders

are covered in the specification is under various stages of tendering and placement of order. As

such the ratings indicated are tentative and may be subject to changes depending upon the

mechanical equipment supplier. Besides the Owner reserves the right to vary the ratings and

Quantities while placing order on the successful tenderer or during execution of the work. For all

such changes the unit rates quoted for the different starter types and the components by the

vendor and agreed by the Owner shall be applicable.

1.5 The scope of work also includes testing & commissioning of the equipment supplied.

1.6 Each set of product loading pump shall have one common group VFD ( Variable Frequency

Drive) with associated control gears such as soft starter, Contactor, over load relay,etc as per

SLD.

1.7 Common group VFD and other respective feeder shall be controlled through common MCC

Interface PLC Panel as well as from TAS PLC (Terminal Automation system PLC).

1.8 All equipment supplied shall be new and best of their respective kinds and shall be of the class

most suitable for the purpose for which they are intended.

1.9 Modification of schemes/changes in components, if any suggested during scrutiny/approval of

drawings and execution of work, shall be carried out by successful vendor at no extra cost.

1.10 The scope of vendor includes all associated items / sensors / interlocks required for smooth and

efficient working of system and required during installation, testing & commissioning. All such

items are deemed to have been included in the vendor’s scope.

1.11 Safety interlocks, necessary to ensure maintenance operation shall be provided.

1.12 The system shall work in conjunction with the Owner’s TAS PLC system and connected to TAS

PLC Ethernet bus (10/100 MBPS) for exchange of information / data / commands. Vendor shall

program his system for control, monitoring the operation of the pumps on receipt of commands

from TAS PLC in desired format and also transmit the energy consumption data and other

information about the status / operation of drives and starters to TAS PLC. The communication

format and for hand shaking for required exchange of information / data for desired controls,

reporting and monitoring system of the vendor shall be submitted during detailing.

Exclusion:

1.13 Synchronising Panel





SP-ELE-003.doc

2.0 Operating Philosophy

2.1 PMCC:- (For Plant and other auxiliary loads) (Refer SLD 254625-300-ELE-4102 & Schematic

drawing 254625-300-ELE-4107).

a) PMCC shall have four incomers (one Transformer incomer & Three DG incomers) & two

bus couplers. Under normal condition Transformer incomer will feed entire terminal load.

All the D.G.sets shall be off & all bus couplers shall be closed.

b) Under loss of power supply due to grid power failure or transformer fault, DG-1 shall be

started on AMF signal from PMCC Line PT under voltage relay. When DG-1 is running,

the bus coupler-1 shall open. DG-1 shall feed all the loads except loads connected to wagon

filling MCC, Bunkering /shipping MCC.

c) Motor re-acceleration scheme is not envisaged in case of grid power failure & motors will

have to be started again after starting of DG.

d) Incase DG-1 is running & Grid power is resumed, the Transformer Incomer ACB shall be

closed through synchronizing with DG-1 incomer & after preset delay the DG incomer

shall trip. Thus only momentary paralleling of DG-1 & transformer incomer is envisaged.

e) In case of loss of power supply & D.G.-1 fails to start, Critical DG-3 shall start after time

delay on AMF signal from Line PT on bus-1 & shall feed loads connected to Bus-3 only.

f) DG-2 may be started manually as & when wagon filling, Bunkering/Shipping MCC/OMC

operations are required & grid power is not available.

g) In case of Grid supply failure during night, the critical DG-3 will start on AMF signal &

feed the critical load including lighting. During night when there is no Operation in the

terminal, the AMF starting scheme for DG-1 shall be disabled.

h) In case when DG-2 & DG-3 are running, changeover from DG to grid shall be manual.

Paralleling of DG-2 & DG-3 with the grid is not envisaged.

2.2 PCC (For Electrical Heat Tracing - EHT)

(Refer SLD 254625-300-ELE-4102 & Schematic drawing 254625-300-ELE-4107)

a) PCC shall have three incomers (one Transformer incomer, one DG incomer & one feeder

F9 from PMCC) & one bus coupler.

b) Under normal condition Transformer shall feed the entire load. and DG-4 & the feeder

feeding the Bus-2 loads from DG-2 shall be off and bus-coupler shall be closed.

c) In case of grid supply failure, DG-4 & DG-2 shall be started manually and the ACB feeding

Bus-2 shall be closed. These DGs shall operate independently & Bus-coupler of PCC shall

open during DG operation. Synchronising between DG-4 & DG-2 is not envisaged.

d) When the grid power supply resumes, changeover from DG to Normal supply shall be

manual changeover. These DG’s shall not be paralleled with the grid at any time.





SP-ELE-003.doc

3.0 Technical Specification

3.1. Motor Feeder Requirement

3.1.1. The manufacturer shall consider feeder rating, feeder type (Refer Schematic Drawings), busbar

rating, MCCB rating, CT & ammeter requirements etc., as per enclosed SLD (Refer Appendix-

H).

3.1.2. Motor starters

a) Schematic diagram of starters shall be as per enclosed Motor starter schematic drawings.

b) Motors rated up to & including 15kW shall be started with direct on line (DOL starter) &

Motor rated above15kW shall be started with star-Delta starter.

c) Motors rated including & above 132kW shall be provided with soft starters & started on

DOL.

d) Motors above 30kW & up to & including 90kW shall be provided with Earth leakage

relay with CBCT & motors above 90kW shall be provided with motor protection relay.

e) Common VFD shall be provided for group of motors of one product as per SLD. Other

Motors in this group shall operate on soft starter. VFD & softstarter shall be integral part

of MCC.

f) The motors which do not require VFD shall be DOL/Star delta feeders with

MCCBs/MPCBs + contactors + overload relays with inbuilt single phase preventor

MPCBs provided up to 37kW & above that MCCB shall be provided

g) Current transformers shall be provided for current indication on Switchgear & Local

Control Station at field for all motors.

h) Thermistors are provided in motors rated 30kW and above and all Soft starters and VFD

driven motors. Necessary relay and tripping provision shall be made in respective feeders

in MCC side for this.

i) Necessary Provisions in MCCs shall be provided for interfacing with PLC panel.

j) Circuit for motor space heater shall be provided for all outgoing motor feeder modules

rated 30kW and above.

3.1.3. Component rating for motor starter feeders (including MPCBs/MCCBs) shall be chosen as per

Type-2 co-ordination as per IEC 60947. Type test certificate to this effect shall be provided at

drawing approval stage.

3.1.4. The auto start up sequence for Motors in group shall be assigned by TAS (CR Operator). This

logic shall be applicable for group motors with VFD or without VFD.





SP-ELE-003.doc

3.2. Construction of Switchgears

3.2.1 Switchgears shall be totally enclosed (Form-4b), metal clad, sheet steel fabricated, dust &

Vermin proof, free standing, floor mounted type with self-supporting structure and provided

with integral base frame at bottom. Cable entry shall be provided from bottom with un-drilled

gland plate. PMCC shall be single front draw out execution and fully compartmentalized.

MCCs shall be double front, draw-out / non draw-out execution as indicated in SLD & fully

compartmentalized. The Panels shall have IP 42 degree of protection with gasketed doors. All

doors shall be fastened to the vertical section by means of concealed hinges. The sides, top &

bottom of each vertical section shall be covered with removable screw-on plates with formed

edges all around.

3.2.2 The Switchgears shall be easily extendable on either side by the addition of vertical sections. It

shall be possible to extend the Switchgears, irrespective of the type of end panel and design

shall be such as to permit addition of extension panels of a type other than the type of end

panel. It shall be of unit construction suitable for splitting into sections for shipping to site and

to be correctly re-erected on prepared foundations without skilled supervision. The individual

shipping section shall comprise not more than three verticals. For each shipping section

adequate lifting facilities such as hooks for ease of handling on site shall be provided. These

hooks when removed shall not affect the degree of protection of Panels. Vendor shall supply

accessories such as bus links, etc. for connecting various shipping sections at site.

3.2.3 The Switchgears shall be fabricated preferably from CRCA sheet steel of minimum thickness

2mm. for load bearing members, 1.6 mm for non-load bearing members & 3mm for gland

plates. Removable type undrilled gland plates shall be provided at bottom of the panel.

3.2.4 The height of Switchgears shall be constant throughout the length, but not exceeding 2400mm.

The arrangement of feeders shall ensure that operating height of components shall be above

450mm & below 1800mm from finished floor level. Cable alley width shall be min 250mm.

The minimum height of outgoing feeder module shall be 200mm.

3.2.5 Busbars shall not be exposed when CB / Starter module is removed. Insulated and isolated

vertical busbars are required. Barriers shall be provided to separate the bus compartment from

wiring space at top, bottom and sides of each section and shall be adequate to prevent

accidental contact and restrict propagation of unit originated arc into the busbar compartment.

3.2.6 Starter Unit / CB shall be draw-out type. Each starter / CB compartment door shall be

interlocked with door mechanically so that it cannot be opened unless the Switch operating

handle is moved to the "OFF" position. However, the handle mechanisms of the Switch shall be

so designed that a qualified person can defeat the door interlock for purpose of inspection

without interrupting power.

3.2.7 Each draw-out unit shall be equipped with a mechanical safety interlock such that:

a) A withdrawn unit with the Switch in the 'ON' position cannot be inserted into the vertical

structure and make contact with the vertical bus.

b) Units in the fully inserted position shall not be able to be withdrawn with the Switch in the

'ON' (closed) position.





SP-ELE-003.doc

3.2.8 Front access shall be available to all components in each cubicle, which require adjustment,

maintenance or replacement. Checking & removal of components shall be possible without

disturbing adjacent equipment. All auxiliary equipment shall be easily accessible. Setting of

relays shall be possible without de-energizing other equipment. Access shall be available to all

cable glands & multicore terminal blocks by means of sheet steel hinged doors, designed to

give the maximum possible access to the cable terminations. The cable alley door shall be

provided with bolts, which can be opened with special keys but by authorized person. Plug-in

stab construction shall assure positive electrical and mechanical contact to the bus under all

loads and rated fault conditions.

3.2.9 All incomers, bus couplers & outgoing feeder shall be designated as per SLD. Incoming feeder

shall be mounted in separate vertical section. The arrangement of feeders in the panel shall take

into consideration the number & size of cables required for the feeders. Extension box if

required for termination of cables shall be included.

3.2.10 Vendor shall provide partition between two power cable terminations of outgoing feeders.

Vendor shall provide FRP shrouds on outgoing feeder terminations.

3.2.11 Base frame:

Switchgears shall be provided with integral base frame which shall be bolted/welded on the

cross members provided by owner. Base channel of height 75mm shall be provided. Amply

dimensioned oblong holes shall be provided on the base frame. The base frame shall be of

standard sections, re-rolled sections will not be acceptable. Vendor shall give base frame details

in foundation drawing. Foundation on which base frame is mounted is excluded from Vendor’s

Scope of supply. Vendor shall provide the dummy panel wherever the floor beam fouls with

cable entry. Requirement of Dummy panel will be confirmed later. Vendor shall provide the Unit

Rate of dummy panel.

3.3. Busbars

3.3.1 Power/Main Busbars shall be made of Electrolytic grade high conductivity Aluminium &

Control Bus shall be made of electrolytic copper with continuous rating as required. Three

phase & Neutral bus shall have facility for connection with earth bus. All busbars & their main

current carrying connections shall have same cross sectional area throughout the length. All

busbars shall be insulated with heat shrinkable PVC sleeves or epoxy painted in black colour.

All busbars shall be colour coded such that on removal of any door the phases shall be

identifiable. All busbars shall be accessible for inspection & easily replaceable.

3.3.2 Busbar size shall be determined by taking into consideration the specified continuous current

rating & fault level for 1 sec, without exceeding the busbar final temperature of 95ºC. The

busbars shall be supported by insulators of non-carbonizing material resistant to acid and alkali

and having non-hygroscopic characteristics, adequate mechanical & high dielectric strength and

braced to withstand fault level specified. The main horizontal power busbars & Control busbars

shall be located at the top. Power & Control busbars shall be segregated. Size of neutral busbar

may be half the size of main busbars. Neutral busbar shall include taps for each outgoing cable

connection in each vertical section. The clearance between live parts & earth shall be as per

IEC.

3.3.3 Busbars and connections shall be secured in such a manner that the insulators are not subjected

to bending forces under short circuit conditions. Dynamic stresses shall be calculated on the

basis of peak short circuit current. For long Busbars, suitable expansion joints shall be

provided.





SP-ELE-003.doc

3.3.4 Separate set of vertical busbars shall be provided for front and rear sections. The vertical

busbars shall be sized to carry continuously at least the sum of rated currents of the connected

circuit breakers. Short time rating of vertical busbars shall be same as main busbars.

3.3.5 It shall be possible to extend the busbars at either end of the switchboard for addition of future

units. Both ends of busbars must be suitably drilled for this purpose.

3.3.6 Where busbars are taken through the partitions of adjacent cubicles, fireproof shrouding shall

be provided to prevent spread of fire from one unit to the next.

3.3.7 Thermal design of the busbars shall be based on installation of the switchgear in poorly

ventilated conditions. The cooling air volume shall take into account only the bus enclosure.

3.4. Air Circuit Breakers (ACB)

3.4.1 The Circuit Breaker shall be microprocessor based manually & electrically operated, four pole,

air break, and draw-out type. Short circuits withstand capacity for ACBs shall be same as that

of switchgear. Breaker continuous current ratings shall be in panel ratings. No external mean

shall be provided for limiting temperature rise in panel box.

3.4.2 The charging mechanism of the circuit breaker shall be motor operated. The close / trip control

switch to be interlocked to trip before close. The closing and tripping circuits shall be self-

opening on completion of their respective functions irrespective of the position of the control

switch. Manual closing devices shall also be provided. Operating handle shall be provided for

charging the spring manually.

3.4.3 The Circuit Breaker shall be provided with mechanical, TRIP and SPRING CHARGED,

DISCHARGED indication, T/N/C control switch, mechanical trip push button, mechanical

‘close' push button, and padlocking facility.

3.4.4 The circuit breaker shall be electrically and mechanically trip free, with anti-pumping feature.

3.4.5 The breaker shall be provided with minimum 6 NO + 6 NC auxiliary contacts. Out of these

auxiliary contacts Min. 3 NO + 3 NC shall be provided for Owner's exclusive use at site. The

design of the contacts shall be such that they can be easily converted from normally open to

normally closed type and vice versa. All spare contacts shall be wired up to terminal blocks. In

case multiplication of contacts are required, the same shall be done using EE make VAJC relay

without any extra cost (Latch in type with electrical reset feature).

3.4.6 The auxiliary contact for the shunt trip shall be of advanced nature such that the auxiliary

contact close before main contacts.

3.4.7 The main and secondary isolating contacts of the circuit breaker shall be of self-aligning type.

The main isolating contact shall have continuous rating equal to the rating of the breaker. The

secondary isolating contact shall be of wiping contact type.

3.4.8 The fixed portion of the circuit breaker shall have slide rail arrangement over which the chassis

can move smoothly. The breaker shall have 3 distinct positions, such as "SERVICE", "TEST"

and "ISOLATED", with padlocking facility in ‘Test’ & ‘Isolated’ position. Proper mechanical

indication shall be provided to locate these three positions without opening the compartment

door. It shall be possible to bring the circuit breaker to isolated position with the help of

external lever without opening the compartment door. A stop block shall be provided on the

slide rails to prevent the movement of the circuit breaker out of the compartment when it

reaches the isolated position so that any accidental fall can be avoided.





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3.4.9 Wherever cut-outs are provided for the circuit breaker control box, proper continuous gaskets

shall be provided. Provision shall be made for closing the cut-out provided for the control

boxes when the C.B. is taken out of the compartment.

3.4.10 The circuit breaker shall be provided with automatic safety shutters, so that before the breaker

reaches ìsolated' position the main isolating contacts are completely shrouded. When the

circuit breaker compartment door is open it must not be possible to touch the live parts. All

removable covers protecting live parts shall be clearly labelled with warning notices reading

“LIVE PARTS. ISOLATE ELSEWHERE BEFORE REMOVING COVER”.

3.4.11 The circuit breaker compartment shall be so designed that hot gases produced during fault shall

be lead away from the operator.

3.4.12 It shall be possible to readily remove the arc chutes for routine inspection of the contacts with

the circuit breaker in the “withdrawn” position.

3.4.13 The protective relays and instruments shall be mounted in separate compartment. This

compartment shall be along side and immediately next to the controlled breaker.

3.4.14 The CB shall be provided with microprocessor based direct acting protection releases for

overload, short circuit, earth fault & Under-voltage. The releases shall be adjustable type.

3.4.15 The following interlocks shall be provided on the circuit breaker :

a) It shall not be possible to withdraw the circuit breaker from the service position with the

contacts of the breaker closed.

b) It shall not be possible to close the circuit breaker unless any one of the three positions is

located, the service position, a definitely located test position, or isolated position.

c) It shall not be possible to open the compartment door when the circuit breaker is ON.

d) The circuit breaker can be padlocked in OFF position with door interlock defeat facility.

e) Castle key interlock shall be provided for incomers & bus couplers to prevent parallel

operation where specified.

3.4.16 All the non-conducting metal parts of the circuit breaker trolley shall be bonded together and

shall make perfect electrical connection to earth through substantial sliding contacts, at service

and test positions. Such sliding contacts shall be arranged to make before power plug in and

interrupt after power draw out.

3.4.17 All circuit breakers of same rating shall be identical in all respects and shall be interchangeable.

However, breakers of different ratings shall not be interchangeable.

3.5. Switch fuse Unit

3.5.1 The switch fuse unit shall be air-break, heavy duty type with quick snap action make & break

features. Fuse shall be after the Switch so that at no point of time, Fuse remains live when

Switch is isolated.

3.5.2 The operating handle shall be mounted on the door of the compartment housing the switches.

The switches shall be provided with an interlocking arrangement such that when the switch is

ÒN’ it shall not be possible to open the compartment door.

3.5.3 To facilitate closing of switch with door open during maintenance / testing, interlock defeat

mechanism shall be provided.

3.5.4 The switch shall be provided with padlocking facility in ÒFF’ position.





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3.5.5 Switches shall have utilization category AC 23 when switching motor loads or highly inductive

loads & AC 22 when switching mixed resistive & inductive loads.

3.5.6 In case of switch-fuse feeders, the switch rating shall be equal to or greater than the fuse rating.

3.5.7 All removable covers protecting live parts shall be clearly labeled with warning notices reading

“LIVE PARTS. ISOLATE ELSEWHERE BEFORE REMOVING COVER”.

3.5.8 Fuses provided shall have rupturing capacity greater than the fault level specified.

3.5.9 Fuses shall be of link type.

3.5.10 Indication shall be provided in the fuses to indicate the fuse has operated. Operating indicator

shall be visible without removal of fuses from service. Removal of fuses, however, must be

possible, although full voltage may exist at the terminals. Fuses shall be pressure fitted type.

3.5.11 Fuse grips shall be supplied along with switchboards.

3.6. Moulded Case Circuit Breakers (MCCB) & Motor Protection Circuit Breaker (MPCB)

3.6.1 MCCBs/MPCBs shall be of triple / four pole construction for panel mounting, operating

mechanism shall be trip free, quick make quick break type. Short Circuit withstand capacity for

MCCBs/MPCBs shall be same as that of switchgear.

3.6.2 The MCCBs/MPCBs shall be provided with front operating handles & mechanical ON/OFF

indicators. In case of trip handles shall remain in an intermediate position.

3.6.3 MCCBs/MPCBs shall be microprocessor based and Plug-in & Plug out or draw-out type with

all releases. The releases shall be adjustable type.

3.6.4 MCCBs/MPCBs in individual motor circuits shall be designed for application, in combination

with motor starter units. They shall be microprocessor based to provide short circuit and earth

fault protection & shall confirm to ‘Type 2 co-ordination’ which is Type tested.

3.6.5 MCCBs/MPCBs shall have following accessories & features:

a) Auxiliary contact set of 1 NO + 1NC

b) Fault signalling contact set of 1 NO + 1NC

c) Insulation shields to isolate the connection between each pole.

d) Finger protection plate to prevent accidental contact.

e) The compartment door shall be interlocked with handle of MCCB.

3.7. Contactors

3.7.1 The air break contactors shall be of electromechanical, triple pole type conforming to AC3

category of duty. However for motors in inching or reversing rotating service, utilization

category AC4 shall be used.

3.7.2 The auxiliary contactors shall have 4 NO + 4 NC contacts with at least 2 NO + 2 NC auxiliary

contacts for owner's exclusive use. The spare contacts shall be wired up to the terminal block.





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3.7.3 The contactor coil shall be suitable for the specified control voltage. The coils shall have grade

‘H’ insulation and shall be suitable for use in the ambient temperature specified elsewhere.

The design of the contactor shall ensure easy access to auxiliary contacts and coil. Mechanical

ON-OFF indication shall be provided for the contactors. Wherever mechanical indications are

not provided, indicating lamps shall be provided for ON indication of the contactor. The

contactor shall pick up at 80% to 110 % of the control voltage and shall not drop out for

voltage up to 45%. Incoming and outgoing terminals shall be segregated and terminal capacity

shall be suitable for the type of termination adopted.

3.7.4 The contactor rating shall be chosen to provide Type-2 co-ordination as per IEC 60947. In case

of Star-delta starter feeder, rating of all three contactors shall be identical.

3.8. Relays & Timers

3.8.1 All relays shall be microprocessor based, Numerical Protection relays with communication

facility.

3.8.2 All relays specified shall be flush mounted in dust proof cases and shall match the appearance

of the instruments mounted on the same panel. Relay covers shall be of non-ignitable materials.

3.8.3 Breaker auxiliary contacts shall be wired up to numerical relay for status record.

3.8.4 Protective relays shall be withdrawable type. Trip circuits shall be automatically broken and

current transformer secondary circuits shorted, when a relay is withdrawn from its case. A

marking strip shall be provided in front of each terminal block and a diagram plate at the back

of each case to identify connections.

3.8.5 Relay contacts shall withstand repeated operation and shall make or break the maximum

currents in their circuits without deterioration. All spare contacts shall also be wired up to the

external terminals.

3.8.6 Relay coils shall carry their normal currents indefinitely and such currents as can occur under

fault conditions. Relay mechanisms shall not be affected by vibration or magnetic fields, which

may occur in normal operation.

3.8.7 Auxiliary relays in tripping circuits shall have mechanically operated flag indications and shall

be hand reset type. Indicators shall be capable of being reset without opening the relay case. It

shall not be possible to operate any relay by hand or to alter its setting, without opening the

case. For relays with combined functions such as inverse time and instantaneous trip, separate

indications of each function as specified shall be provided.

3.8.8 Master tripping relay (lock-out relays) shall be of the hand / electrical reset type with self coil

cut off contacts and shall have at least 2 ‘NO’ + 2 ‘NC’ spare contacts for owner’s exclusive

use. Necessary multiplication by auxiliary relay shall be done.

3.8.9 Provision shall be made for insertion of test plug at the front for testing and calibration using

external source of power without disconnecting permanent wiring. Test plugs shall permit the

shorting of any current transformer circuits.

3.8.10 Auxiliary relays on which the function of a contact may be changed from ‘NO’ to ‘NC’ and

vice-versa by simply changing the contact arrangement are preferred.

3.8.11 Motor Overload Protection Relays

Overload protection relays shall be installed in all phases & shall have in-built Single Phasing

Protection feature. Relay shall be temperature compensated type with manually reset facility on

the front of the compartment door.





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3.8.12 Overload protection relays shall be direct line mounted upto 50A rating. Higher ratings shall

utilize CTs. Relays shall be with adjustable trip class -10,20,30 as per IEC 60947.

3.8.13 Motor Earth Fault Protection Relays [ELR]

Motors rated 30kW and upto & including 90kW shall be provided with core balance type earth

fault protection relays. Relays shall be manually re-settable after opening the compartment

door. The relays shall be equipped with clear trip indication on the relay. The sensitivity of the

relays shall not exceed 3 % of the rated nominal motor current or 6A, whichever is greater.

Contacts of relay shall be wired through 0 - 10 sec. On delay timer, so that (the MCCB/MPCB

breaks the fault current before the contactor open) opening of contactor is delayed. The timer

is not indicated in the scheme but vendor shall supply the same.

3.8.14 Motor Protection Relay [MPR]

Motors rated above 90kW shall be provided with Motor Protection relay. Motor Protection

relay shall have the following features:

• Thermal Overload

• Single phase / Current unbalance

• Contactor failure

• Locked / Stalled rotor

• Ground fault

• Undervoltage

• Overvoltage

• Overtemperature

• Undercurrent & Underpower

3.9. Control Switches, Indication Lamps, Push Buttons & Control Fuses

3.9.1 Each Air circuit breaker shall be provided with trip-neutral-close control switch and local

remote selector switch.

3.9.2 All circuit breaker operating switches shall be of the pistol grip type, spring return to neutral.

They shall be arranged to close the breaker by being turned clockwise. The trip, neutral and

close positions shall be clearly indicated. The movement shall be such that the switch cannot

be operated inadvertently and that it is mechanically interlocked to trip before close. The

operating switch shall be located on the centre line at about 1.5 meters from the floor level.

Two spare ways shall be provided on these switches.

3.9.3 Ammeter selector switches shall have `make` before break feature on its contacts. The selector

switch shall generally have four positions for reading three phase currents and the neutral

current.

3.9.4 The voltmeter selector switch shall also have four positions. Three shall be used to measure

phase to phase voltages and the fourth shall be ‘OFF’ position.

3.9.5 Based on operational philosophy, Auto / Manual selector switch shall be provided.

3.9.6 Indication lamps shall be cluster of LEDs. Voltage rating of LED shall be equal to rating of

control circuit voltage. The covers of the lamp shall be heat resistant.





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3.9.7 Indication lamps shall be provided for each feeder in Switchgear as per feeder schematics.

3.9.8 Emergency Stop push buttons shall be mushroom headed, stay put type, with press to lock &

twist to unlock (release) operation.

3.9.9 Colour coding of Push Buttons & Indication Lamps shall be as follows:-

Push Buttons Lamps (LED Type)

Start or On - Green Running or On - Red

Stop or Off - Red Stop or Off - Green

Alarm Reset - Yellow Fault - Amber

Acknowledge - Black Trip coil healthy - White

O/L Reset - Blue Spring charged - Blue

Trip circuit healthy check - Black Breaker in Service - Blue

DC Supply Failure - Red

Control supply healthy - White

3.10. Indicating Instruments & Meters

3.10.1 All indicating instruments and meters shall be capable of carrying continuously their full load

currents and full voltage across their pressure coils. They shall not be damaged by the passage

of fault currents or the existence of over pressure on the primary side of their instrument

transformers for the maximum permitted duration of fault conditions, which may occur during

normal operation. All instruments and meters shall be back connected.

3.10.2 The type and quantity of the measuring instruments shall be as specified in schematic drawings.

3.10.3 All instruments shall be of the flush mounting type and shall have an enclosure with a degree of

protection of at least IP 52.

3.10.4 They shall be equipped with non-glare, non-reflecting windows. Standardized dimensions shall

be used in accordance with IEC 60473.

3.10.5 Indicating instruments shall be in accordance with the relevant IEC standards and have an

accuracy class 1. Analogue meters should be of the square pattern type 96 x 96 mm, and

mounted at a suitable height for easy reading from the front. Scales shall be in actual values.

3.10.6 Meters shall be installed on the door of the respective functional units.

3.10.7 Ammeters for motor current indication shall have suitable suppressed scale corresponding to

motor starting current.

3.11. Current Transformers

3.11.1 The CTs shall be Resin cast bar type. CT secondary shall be 5A/1A. The minimum burden shall

be 15VA. However, current transformers shall have sufficient capacity to operate with the

burden imposed by the devices shown on drawings with their accuracy classification. Separate

cores shall be used for metering and protection.





SP-ELE-003.doc

3.11.2 CTs for measuring instruments shall have an accuracy class 1.0 and accuracy limit factor less

than 5.0. CTs for Protection shall have an accuracy class 5P and accuracy limit factor 20. CTs

for restricted earth fault protection shall confirm to class X.

3.11.3 The CTs shall be capable to withstand dynamic and thermal stresses originated by the fault

current.

3.11.4 The CTs shall be suitably insulated and the mounting of the CTs shall facilitate easy

maintenance. The CTs shall be mounted in stationary part of switchgear.

3.11.5 Shorting links shall be provided for the secondary of the CTs when wired to terminals.

3.11.6 One side of current transformer secondary shall be grounded in the compartment with the

meters or relays which they serve and each CT group shall be grounded with a separate

identified lead which may be disconnected for testing.

3.11.7 For all motors the CT signal shall be brought out as per SLD for current indication at Local

Control Station. CT terminals shall be suitable for termination of 4 sq.mm cable.

3.11.8 CT parameters shall be verified by vendor, based on connected relay make & relay

manufacturers recommendation.

3.12. Potential Transformers

3.12.1 The Potential Transformers shall be epoxy cast resin type. Potential transformers shall have

sufficient capacity to operate with the burden imposed by the devices shown on the schematic

drawings with their accuracy classification.

3.12.2 The Potential Transformers shall have an accuracy class 1.0 for voltmeter & for other meters

3.12.3 The primary of the Potential Transformers shall be rated for 415 volts and the secondary for

110 volts. PT’s shall have a continuous voltage factor of 1.2 with short time over voltage

factors as below:

• 1.5 for 30 seconds in case of effectively earthed systems.

• 1.9 for 8 hours in case of non-effectively earthed systems.

3.12.4 The PT shall be provided with HRC fuse on the primary side and MCB on secondary side.

3.12.5 For proper relaying, one side of PT secondary shall be grounded at the transformer and the

ground connection shall be identified and removable for testing.

3.12.6 Test terminals shall be provided for PT circuits.

3.13. Wiring and Identification

3.13.1 All wiring for control signal, protection and metering shall be by PVC insulated, 650 Volt

grade, copper stranded conductor wires of minimum 1.5 sq.mm section. For CT secondary

circuit wires of 2.5 sq.mm copper conductors minimum shall be used. Wiring shall run in

enclosed channel and shall leave at least 25% spare space for future use. Wires for connection

between moving parts shall be flexible stranded copper conductors and the same shall be

soldered at the ends before connections are made.





SP-ELE-003.doc

3.13.2 Terminal strips for connecting incoming control cables shall be channel mounted type of

adequate size and shall be located conveniently for easy accessibility, without danger of contact

with live part, ease of connection and shall be separated by barriers from power circuits. At

least 20% spare terminals shall be provided in each terminal strips. CT secondary lead

terminals shall be provided with shorting links.

3.13.3 All spare contacts of auxiliary relays, timers, contactors etc. shall be wired up to terminals

block. Terminal Block shall be 600V grade 10 Amps rated.

3.13.4 Sufficient terminals shall be provided on each terminal strip to ensure that not more than one

outgoing wire is connected per terminal. The wire shall be identified by numbered ferrules at

each end, in accordance with the connection diagram. All ferrules shall be made of non-

deteriorating materials. The ferrules shall be firmly located on each wire so that they cannot

move or turn freely on the wire.

3.13.5 All inter-panel control wiring shall be done by the switchgear vendor. All wiring shall be

properly bunched, cleated, & supported on a panel frame and shall run in plastic wire ducts.

The interpanel wiring shall be taken through PVC sleeves or suitable rubber grommets.

3.13.6 Colour Coding for internal panel wiring shall be as follows:

Power Wires - Red, Yellow, Blue for Phases.

Control Wires - Grey.

Neutral Wires - Black.

Ground Wires - Yellow & Green.

3.14. Control Supply

3.14.1 Vendors shall provide auxiliary / control supply bus in the switchgear throughout its length for

further distribution inside the switchgear. Vendors shall also provide suitable MCB for

receiving, distributing & in each sub-circuit as per requirement.

3.14.2 Auxiliary Busbars of thick electrolytic tough pitch copper shall be provided for following

applications. Exact number of busbars shall depend on various controls, metering and auxiliary

power distribution requirements.

a) ACB [spring charging motors], Panel / Motor space heater supply – 240V AC, 1 ph, 50Hz,

to be derived by vendor from Phase & Neutral (before Incomer Breaker).

b) Control supply for Annunciators, ACB [Alarm, indications, closing & tripping coils] –

110V DC UPS included separately in vendor’s scope (Refer Appendix-F).

c) Control supply for motor starter control circuits – 240V AC via control transformer, to be

derived by vendor. (Refer Schematic drawing attached).

3.14.3 Two number 110V DC power supply feeders shall be provided for each switchgear from DC

UPS. Suitable DC control supply monitoring & selection scheme shall be developed by vendor.

Any other intermediate voltage required in the panel shall be derived by providing suitable

control transformer.

3.14.4 Control Transformer & Control Circuits:

a) Control transformer shall be double wound, air cooled type with one leg of secondary

earthed unless otherwise specified.





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b) VA rating of the Control transformer to be adequate to supply about 150% of the control

loads of the switchgear. Voltage regulation of the Control transformer shall be limited to

4%.

c) The control supply in Switchgear shall be derived from control transformer with 100%

standby. The control transformers in each panel shall have power supply from each of the

incomer. Out of the two control transformers one shall be working and other will be

standby.

d) Auto-change over system shall be provided for control supply from working control

transformer to standby control transformer and vice versa as per schematic drawings

attached.

3.15. Space Heaters and Cubicle Illumination

3.15.1 Adequately rated anti-condensation space heaters shall be provided in each breaker panel and

in cable alleys of the MCC to maintain MCC inside temperature, 5°C above outside ambient

temperature.

3.15.2 Space heater shall be strip type, rated for operation on 240V, single phase, 50 Hz. A.C. supply

unless otherwise specified.

3.15.3 Each space heater shall be complete with a rotary type ON/OFF switch, MCB in the phase,

neutral link in neutral and a control thermostat.

3.15.4 A separate DP isolator and MCB shall be provided in motor feeders for control of space heaters

of motors. These shall be wired through a 'NC' contact of the contactor / circuit breaker for

motor control.

3.15.5 Each vertical panel shall have fluorescent light fittings for internal cubicle illumination with

door switch.

3.15.6 240V, 15A SPN Industrial socket outlet, complete with MCB & earth leakage protection shall

be provided in each vertical panel.

3.16. Earthing

3.16.1 An earth bus of at least 50mm x 10mm aluminium shall be provided. The earth bus shall be

electrically continuous and shall run the full extent of each board. The earth bus shall be made

up of electrolytic copper. Each unit shall be constructed to ensure satisfactory electrical

continuity between all metal parts not intended to be live and the earth terminals of the unit.The

earth bus shall be located at bottom

3.16.2 At each end of switchgear, suitable slots shall be provided on main earth bus for connection to

Owner's Earth. The earth bus shall be accessible in each cable compartment either directly or

through a branch extension to ground the cable armour and shields.

3.16.3 All doors and movable parts shall be connected to the earth bus with flexible copper

connections. All non-current carrying metallic parts of the equipment shall be earthed. Earth

bus shall be brought back to cable compartment and earthing bolts shall be provided to ground

cable armours.





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3.17. Busduct Terminations

3.17.1. PMCC/PCC Incomer will be connected to Transformers by Busducts (with Aluminium Busbars)

from top. Vendor shall furnish flange details sectional details of bus bars for Busduct

connection.

3.18. Cable Entry and Terminations

3.18.1 For Switchgears, opening with removable gland plate for cable entry shall be provided at the

bottom for both incoming and outgoing cables. Terminals shall be located sufficiently away

from gland plate to facilitate easy connection. Gland plate shall be minimum 3 mm thick.

3.18.2 All terminal blocks shall be furnished with white marking strips marked with terminal numbers

in accordance with the wiring diagrams. The terminal blocks shall be physically grouped and

located suitably for termination of the cables. Terminal block in all drawout units shall be

furnished with pull apart terminals to connect all outgoing wires and shall be furnished with

20% spare terminals at least.

3.18.3 Suitable arrangement shall be made in cable alley for supporting incoming & outgoing cables.

Terminal blocks shall not be used to support cables.

3.19. Soft Starter

3.19.1. Selection criteria

a) Soft starter shall be provided for all product pump motors (Refer SLD) & shall be integral

part of starter module. Design and selection of soft starters shall be done taking into

consideration the fact that the soft starters are to operate continuously (without bypass

contactor) and with all reasonable precautions and provisions for the safety of operating

and maintenance personnel. The soft starter rating shall be at least equal to motor KW

rating at 500C for continuous operation and other specified site conditions. It shall be

suitable for mounting inside the LV switchgear located in Sub-station in Non-air

conditioned environment

b) For the motor, the incoming AC voltage to soft starter shall be 415V, 3 phase, 50 Hz

neutral earthed system.

c) Soft starters shall be digital SCR/IGBT based & shall have rectifier/chopper, DC link and

inverter. The inverter shall be with 6 stepped PWM type, modular type, complete with

power & control section. The selection of the particular type of soft starter; shall be

judiciously decided by the vendor, depending on required starting current limit, the torque

requirements, etc.

d) The soft starters have digital control using microprocessor based digital regulation &

control. This shall be provided with six thyristors in power circuit.

e) Soft starter shall inject low harmonics into the line supply side and have power factor

better than 0.95 & high overall efficiency. Soft starter system including power factor

correction and /or harmonic filters shall not lead to any leading power factor of the system.

f) Individual soft starter module for each motor shall be with MCCB with built-in releases, 3

core CTs for connection to Energy Meter, surge suppressor, soft starter, Contactors ( to

connect VFD and Soft Starter ) and Overload relay. The digital regulation and control

system shall be compatible for operation from VFD.





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3.19.2. Salient Features

Soft Starter for AC drives shall comprise of following features:

a) The other protective features for the Soft starter shall include following:

• Electronic type AC surge suppresser with fuse monitoring device

• AC incomer under voltage & over load

• Negative Phase sequence protection & monitoring

b) Suitable for soft start / current limit / full voltage mode of operation

c) Regulation & control equipment

• The digital drive regulation shall be considered and speed and torque accuracy of drives

shall be as required for the process.

The regulation equipment shall be able to carry out all the control functions including

following important features:

• Current feedback & controller

• Adjustable acceleration / deceleration time.

• Adjustable starting torque

d) Pulse transformers & trigger models

e) Protection, indication & annunciation devices.

f) Load side filter

3.19.3. Protection, Indication And Annunciation Features

a) The protections of the soft starter are to be provided as per the clauses stipulated in IEEE-

444 as suitable and required for each case and shall generally include the following:.

• Control power supply failure

• Ventilation failure

• Wrong phase sequence

• Motor stalling monitor

• Any other protection as required for particular application.

b) The indications shall be provided as listed but not limited to the following:

• Speed indicator of motor as required.

• As marked in SLD, Digital Energy meter (accuracy class 0.5 or better) shall also be

provided in soft starter circuit.

• All meters shall have digital indications but the energy meter (as per IEC-1248) shall

have RS-485 port to communicate energy consumption and other data to MCC

Interface PLC Panel & from there to TAS PLC by soft link.





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c) The annunciation shall be provided as listed but not limited to the following:

• Main power ON

• Control supply ON

• Incoming breaker trip

• Phase loss

• Microprocessor healthy

• System faulty

d) Following shall also be annunciated

• Motor Faults

� Over load relay or Thermister relay

� Over current

� Over speed

� Over voltage

� Earth fault

• Soft Starter status

� Readiness

� Fault

� Run

3.20. Variable Frequency Drive (VFD) Unit

3.20.1. General

a) VFD unit shall mainly consist of a three phase, 12 pulse rectifier bridge, D.C. link with

reactor/capacitors, inverter bridge, microprocessor based control system. The VFD unit

shall have cooling fan and this shall be controlled based on heat sink temperature.

Converter transformer, if required, can be common for one MCC or individual in each

module. However vendor to refer attached Equipment Layout Drg. No. 254625-300-

ELE-4201 & 254625-300-ELE-4202 in Appendix H for space restriction.

b) Converter transformer shall be installed and coupled with respective MCC and it shall be

integral part of MCC. Vendor to ensure that with this configuration harmonics shall be

within limits specified in IEEE-519. Test to this effect shall be carried out at

commissioning stage at point of coupling.

c) The VFD shall be pulse width modulation (PWM) type with flux vector control for

closed loop speed control with pump header pressure feedback for high accuracy and

good dynamic performance. Pressure shall be maintained at set value by speed control of

the motor operating on VFD and switching motors operated on soft starters.

d) VFD shall control operation and speed of product group pumps through a MCC Interface

PLC panel by soft / hardwired contacts and signals.





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e) The unit shall comprise of an incoming microprocessor based MCCB with suitable over

current, short circuit & earth fault releases, three phase diode bridge rectifier acting as

the line converter and three phase inverter as the load converter interconnected through

DC link reactor and capacitor unit and output reactor. The MCCB incomer shall be fully

rated having short circuit withstand 50 KA for 1 sec minimum. The outgoing of the unit

shall include reactor, contactor and thermal over load relay with (1NO+1NC) contacts.

The unit shall also be equipped with thermistor relay. But these Contactors, thermistor

relay & over load relay shall be located in panel.

f) Dynamic braking resistors shall be provided as required.

g) All the busbar works of VFD system shall be of tinned copper.

h) The unit shall have soft / hard wired control system with suitable interfaces with the

MCC Interface PLC panel as well as the required instruments and signals. The MCC

Interface PLC panel shall carry out all the functions required from the unit including

triggering, protection, self-diagnostics, operator & various parameterizations Interface.

i) Suitable operator panel unit for programming /debugging and control shall be provided

on MCC Interface PLC Panel. Display of faults, alarms as well as diagnostic messages

shall also be available in plain text on this operator panel on the cubicle door. It shall be

sealed type with membrane switches & LCD display unit. It shall be connected to the

VFD control board thru soft / hard wire cable. This shall also be user configurable for

simultaneous display of two process parameters customized to user scaled units for

simultaneous display. Besides the above, the following features shall also be provided on

MCC Interface PLC Panel.

• START

• STOP

• Fault reset

• Drive ready, drive on, drive fault, off , overload trip etc.

• Auto and Manual selection

k) All required high-speed electronic protections should also be available with unit apart from

self-diagnostic features. A few are listed below.

• Over current instantaneous trip

• Short circuit protection for converter/ inverter

• Adjustable current limit

• Earth fault protection

• Over temperature at heat sink

• DC bus under voltage & over voltage

• Control & regulated power supply failure

• Phase reversal protection

Abnormal conditions shall initiate alarm and shut down drive based on the nature of the

fault.





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l) Instruments:

• Digital Speed Indicator.

• Digital Energy meter (accuracy class 0.5 or better)

• All meters shall have digital indications but the energy meter (as per IEC-1248) shall

have RS-485 port to communicate energy consumption and other data to MCC

Interface PLC Panel.

3.20.2. Design Criteria

a) Input voltage : 415V (+10%, -10%), TPN

b) Input frequency : 50 Hz ± 5%

c) Ambient temperature : 50 deg C

d) Output Voltage : 0- input Voltage,3 Phase

e) Output Frequency : 0- 60 Hz.,3 Phase or as required

f) Resolution : 0.01 Hz.

g) Inputs and Outputs : Digital & Analogue I/Os as per Schematic drawings

h) Short time Overload Capacity : 150% for 1 min./ every 10 min.(constant torque)

110% for 1 min./ every 10 min. (squared torque)

and meet the requirement of the driven equipment

i) Switching Frequency : Adjustable to 15kHz.

j) Total Harmonic Distortion : As per IEEE-519.

3.20.3. Features of VFD

a) Auto tuning

b) Parameter lock

c) Power loss ride through

d) Adjustable acceleration / deceleration time

e) Adjustable starting torque

f) Suitable for Constant torque / squared torque application as per requirement.

g) Torque boost at start (adjustable)

h) Adjustable switching frequency

i) Analog inputs/outputs of the converter shall be galvanically isolated type. Digital outputs

shall be potential free type.

j) Components for the same function and rating shall be of identical design, make and of

modular construction to reduce the inventory.





SP-ELE-003.doc

4.0 MCC INTERFACE PLC PANEL

A requirement of common MCC Interface PLC panel per MCC Room / substation is envisaged

for establishing the soft signals between C&A control system to MCC. The common PLC panel

shall be located in MCC room / Substation as a stand alone panel.

Necessary interlock logics required to operate product pumps when TAS PLC fails shall be

provided. Vendor to consider for minor changes / addition in interlocks at later date without

additional cost.

4.1. General

4.1.1. Programmable logic controller (PLC) system shall be programmable, modular microprocessor

based system. The MCC Interface PLC panel shall provide a redundant ethernet

communication link with Terminal Automation System (TAS). It shall be capable of bi-

directional communication to provide both monitoring and control from TAS. Refer attached

Interface Block Diagram.

4.1.2. The PLC shall have very high noise immunity in order to ensure safe and reliable operation

when subjected to electrical radio frequency interference and electro magnetic disturbances

expected in a plant. The design of system electronics shall be in compliance with the

electromagnetic compatibility requirements as per IEC.

4.1.3. One common programming terminal shall be supplied for the two PLC panels. This shall be

suitable for panel door mounting with suitable plug/port. The programming terminal shall be

located in Substation-1 & shall be connected to both PLC’s through Ethernet.

4.1.4. Operation of the PLC shall be completely unaffected by a momentary

power loss of the order of 20 Milli–second.

4.1.5. The common PLC panel shall provide features advantageous to plant operation and

maintenance such as alarm logging, fault recording, performance trends, self-diagnostic

facilities, measured value and not limited to the following :

• Interface between all systems devised to PLC Panel

• I/O modules to interface discrete analogue/digital signals.

• Input & Output relays as per schematic.

• Software package shall include graphical displays, data, event logging etc.

• Each of the sub-system for controllers, communication, power supplies and storage shall be

redundant complete with automatic or manual switch over in case of a failure of working

system or maintenance of sub-system.

• The system shall have data exchange through ethernet communication that is implemented

on a dual redundant network configuration. Automatic changeover facility shall be possible

in case of failure of one of the cables.

• PLC Panel shall have system expansion capability of minimum 20% without major changes

to system architecture.

• It shall be possible to simulate all the required graphics including the single line diagram

and schematic wiring diagram. All the events and alarms to be logged and printed in

chronological order.





SP-ELE-003.doc

4.1.6. PLC Panel shall provide the following features :

• Equipment control suitable for Auto and Manual indications.

• Status indication and alarm functions.

• Measurement and logging of circuit data.

• Serial communication with TAS, through ethernet.

4.1.7. Serial link shall be capable of bi-directional communication to provide both, monitoring and

control from TAS. The following shall be provided as a minimum :

Monitoring:

• H.T. 33kV main Incoming breaker status.

• H.T. 33kV main Incomer breaker energy, voltage, current & Power factor.

• PCC & MCC Incoming circuit breaker status

• PCC & MCC Incoming circuit breaker/ Isolator switch ,energy voltage, current & power

factor

• Motor status

• Motor current, energy voltage, current & power factor

• Motor “Available”

• Motor Fault alarm

• VFD drive speed monitoring at TAS PLS as well as in PLC panel.

Control:

• Motor start, stop

• Incoming circuit breaker trip

• Speed variation of VFD control motors from TAS PLC as well as from MCC Interface PLC

panel.

4.1.8. MCC Interface PLC Panel Vendor shall include in his scope, the configuration, provide

Modbus mapping tables and necessary assistance for configuration at the TAS.

4.1.9. Configuration changes, by means of a permanently installed keypad / hand-held programmers

and an Engineering Work Station (Desktop) shall be possible.

4.1.10. The common engineering work station shall have the following provision:

• Configuration of all protection and control parameters

• Monitoring of all measured actual values

• Monitoring of the status of all input contacts

• Reporting a motor data (motor current, earth fault current, percentage phase imbalance)

following a trip.

• Historical statistical reports (motor stopped time, motor running time, number of contactor

operations, number and type of trips) with time stamping.

• Trend analysis.





SP-ELE-003.doc

• Communication errors.

4.2. Operating Philosophy of Group VFD

4.2.1 Function of TAS PLC

The operation (as described in the Remote Auto mode below) will be carried out by TAS PLC.

Start & emergency stop command for each group shall be provided by TAS PLC to VFD via

MCC Interface PLC. TAS PLC will monitor drives & their energy consumption and further

generate necessary report including energy consumption reports (pump wise and product wise).

Master motor selection (To select the motor which should run on VFD) and issue of Pressure set

point for all product groups shall possible by TAS PLC. It can change the PID parameters and

can monitor the speed of the motor running on VFD.

4.2.2 Function of INTERFACE PLC

Function of INTERFACE PLC is to provide facility to start any pump of the group with one

VFD and run the same on VFD to control the required set pressure in the line by switching in

other pumps

(one by one) as per sequence of operation assigned by TAS PLC with their respective soft

starters. INTERFACE PLC also ensures control, monitoring the operation of the pumps on

receipt of command from TAS PLC and also transmits the energy consumption data and other

information about the status/operation of drives and starters to TAS. PID loop which controls the

operation is set in the INTERFACE PLC.

4.2.3 All the group VFD product pump motors will be controlled in following modes :

• Remote Auto mode( From TAS PLC via Ethernet bus)

• Remote back up Auto mode (via Ethernet bus & via hard wired contacts)

• Local mode

4.2.3.1 Remote Auto mode ( From TAS PLC via Ethernet bus)

� In this mode of operation, Local / Remote selector switch shall be in remote position. PID

operation is used in the Remote-Auto mode to receive pressure set point to control the speed

of the pump to maintain a constant header pressure for proper loading. 2nos pressure

transmitters provided on each product header shall be connected to MCC INTERFACE PLC

and TAS PLC. The pressure transmitter provides a pressure feedback in the form of 4-20mA

to group VFD. The PID loop programmed in the group VFD receives a pressure set point

from TAS PLC & maintains a pump speed to match the pressure set point with Pressure

transmitter feedback.

� The remote mode operation is initiated with a ‘Group start command’ from the TAS PLC,

through Ethernet Bus. After receiving this command the group VFD starts the motor (which

is selected as master by TAS PLC) on VFD and performs the following operation :

• VFD varies the speed of the pump w.r.t. the pressure requirement set as the target of

PID.

• In case if the pressure requirement is not achieved even after the VFD reaches its full

speed, the second motor of the group is started using soft starter.





SP-ELE-003.doc

• When the second motor is started on Soft starter, it reaches its full speed within 15

seconds time and there may be a sharp rise in the pressure.

• Speed of the pumps, which is running on VFD, is reduced to maintain only the set

pressure on the delivery head.

• If the pressure requirement is not met with even two pumps running at their full capacity

third and fourth (where ever applicable) motors are turned on, with a constant watch on

the pressure requirement on the delivery side. When the pressure set point is less than

the actual pressure on the delivery line, the VFD speed reduces and if it reaches to

‘10%’ speed for more than 10 seconds, then the last motor (which was started on Soft

starter) will be turned off and VFD picks up its speed.

� The speed of the pump, running on VFD are decided by the PID, using the pressure set point

and the process value. No manual intervention is possible in this mode. (Other than group

start & stop command) and the logic is automatically controlled by the TAS PLC through

MCC interface group PLC.

� In case if the motor of the product group needs to be taken in maintenance, incoming supply

to its soft starter shall be switched off and the local remote selector switch of that motor

shall be put in ‘Local’ mode.

� In case if the Master motor (the one which is running on the VFD) trips on a fault, all group

motors will be stopped. (Other motor can be selected as Master motor from TAS PLC &

group can be re-started).

� At the same time if a group motor which is running on soft starter, trips on a fault the

operation will continue with other motors.

� When the ‘Group start command’ is active, individual motor start command for that group

will not be accepted unless it is selected in ‘Local’ mode.

� In case of failure of TAS PLC totally, MCC INTERFACE PLC can run the system

independently but the set point for the group and deciding the initial start command for the

group will be given from MCC INTERFACE PLC manually, through workstation.

4.2.3.2 Remote Back-up Auto Mode(via Ethernet bus & via hard wired contacts)

� In this mode, in case of failure of MCC INTERFACE PLC, individual motors can be started

and stopped on their corresponding soft starters by the TAS PLC. However there will be no

PID operation available.

4.2.3.3 Local mode

� This mode is selected when the selector switch on the LCS is put into ‘Local’ position. In

the local mode each motor can be started / stopped from its LCS or VFD panel. No PID

operation is possible in this mode and the motor on-off control is done manually. This mode

will be generally used for Test operations.

4.2.4 All other pump motors (viz. Utility service pumps, slop pumps, product overfill recycle pumps

etc.) provided with Star-Delta / DOL starters will be operated in the following modes :

� Local mode from local control station.





SP-ELE-003.doc

� Remote mode (manually) from control room

� These pump motors will not have auto start facility. They will be operated manually either

from control room or from pump house. Local remote selector switch shall be provided in

the Local control station.

The grouping of Motors shall be as per the following table:

Group No. Pump/Motor Tag Nos. Grouping of Pumps

Group I 300-P-001 + 005S Pump 005S used at group I & IV

Group II 300-P-002A + 002S

Group III 300-P-003A + 003B + 003C + 003D

Group IV 300-P-005A + 005S 005 used at group I & IV

Group V 300-P-015 015 used at group X & XII.

Group VI 300-P-008A + 008S -

Group VII 300-P-010A + 017S 017S used at group VIII & VII.

Group VIII 300-P-010B + 017S 017S used at group VIII & VII.

Group IX 300-P-012A + 012S -

Group X 300-P-013 + 015 + 014S P-015 used at group V & XII

P-014S used at group X & XII

Group XI 300-P-016A + 016B + 016C + 016S -

Group XII 300-P-014A + 014S + 015 P-014S used at X & XII

P-015 used at V, X & XII

- 300-P-019A + 019B + 019C + 019D

+ 019E + 019F

Bunkering / Jetties No VFD

4.3. Construction

a. MCC Interface PLC Panel cabinets shall be free standing, enclosed type, providing IP42

degree of protection and suitable for bottom entry of cable. Cabinets shall be RITTAL make

PS series or equivalent. Cabinet structure shall be sound and rigid and shall be provided with

lifting lugs to permit lifting of the cabinets.

b. Cabinet shall be fabricated from cold rolled steel sheet of minimum 2mm thickness suitably

reinforced to prevent warping and buckling. Doors shall be fabricated from cold rolled steel

sheet of minimum 1.6mm thickness. Cabinets shall be thoroughly deburred and all sharp

edges shall be grounded smooth after fabrication.

c. Cabinets shall be equipped with front and rear access doors. Doors shall be equipped with

lockable handles and concealed hinges with pull pins for each door removal.





SP-ELE-003.doc

d. Illumination shall be provided for all cabinets by fluorescent lamps and door operated micro

switches.

e. Equipment within the cabinet shall be laid out in an accessible and logically segregated

manner. Clamping rails shall be provided for incoming cables to prevent excessive stress on

the individual terminal.

4.4. Processor

a) The PLC shall be microprocessor-based system with 32-bit processor with floating point.

Redundancy shall be provided for processor, power supply module & communicaion.

b) The offered processor type shall have a minimum reference capacity to handle atleast 100

real time I/O. The changeover of processor shall be bumpless and the system shall be safe.

c) The size of the memory shall be sufficient for the storage of the program instructions

required by the logic schemes. Loading of memory shall be 60 % and shall have 40 % free

space for future use.

d) Memory shall be non – volatile. In case volatile memory shall be provided, battery back up

shall be provided for minimum of three months to keep the storage intact. A battery drain

indication shall be provided at least one week before the battery gets drained.

e) Function requirement of Processor

• PID, feedback and ratio control

• Timer on delay, off delay.

• Self-tuning capacity for closed loop.

• Algorithms, Arithmetic function, comparison, limiter, selector, and logic function etc.,

• Emergency and safety shutdown.

• Diagnostics of the entire system as well as connected equipment.

• Capable of interfacing with TAS PLC (Owner supply) on Redundant ETHERNET.

4.5. Input/Output Modules

a) I/O devices interface with PLC shall be at I/O racks only. The I/O modules shall be

mounted in the I/O racks. All I/O modules shall be suitable for mounting on DIN rail

carriers.

b) The maximum number of input/outputs per module shall be calculated by the vendor based

on schematic drawings and Block diagrams (Drg. No. 254625-300-ELE-4107).

c) Each I/O shall be electrically isolated from external control circuit by suitable means. The

minimum insulation level between I/O and logic circuit shall be 1000 VDC.

d) Each I/O shall be protected against reversal of polarity of the power supply voltage to I/O.

e) All cards shall be provided with field input/output isolation and channel to channel

isolation. Each module shall have LED for each I/O channel to indicate the status of each

input/output.

f) Each input shall be provided with filters to filter out any noise in the input line or noise

because of input contact bouncing.

g) PLC inputs shall be provided with potential free / dry contacts unless otherwise specified. .

Vendor shall use interposing relays to isolate field digital signals and I/O cards. Input

shall also be protected by fuses.





SP-ELE-003.doc

h) Each output shall be short-circuit proof and protected by fuse. Visual indication of fuse

blown must be provided for each output. Digital output circuits shall be provided with

protection for the switching of inductive loads.

i) The interrogation voltage to the input / output shall be powered from separate redundant

power supply units and shall not be a part of PLC

j) Output contacts from the PLC shall be potential free/dry contacts with contact ratings as

per table below. Wet contacts/ powered contacts/TTL outputs etc. shall not be acceptable.

Suppression device for each output contact is to be provided

k) The output contact rating shall be as follows:

Sr.No Applicable for Volt Current Rating

1 All output cards for driving alarm

annunciator

110V AC

24 V DC

0.5 A 2.0 A

2 All output cards for driving LT

motors/pumps/solenoids

110V AC 5.0 A

l) Input type shall be intrinsically safe with barriers for analog input modules and explosion

proof type for digital input modules. Only Active Barriers shall be employed for achieving

galvanic isolation.

m) Scan time shall be

I/O Critical closed loop Closed loop Open loop

Analog > 200 m sec > 500 m sec > 1 second

Digital > 200 m sec > 500 m sec

n) Analog Inputs Modules:

• Analog input modules shall be Galvanic isolated.

• All the Analog input channels shall be Floating – point type.

• Transmitter power supply shall generally be from the analog input module of PLC

(24V DC) and measurement DC signals shall in general be in the range 4 – 20 mA.

However range shall be selectable 0– 20 mA, 1 – 5 V DC and 0 – 10 V DC.

• Module shall have provision of filtering the measuring signals and input open – circuit

detection

o) Analog Output Modules:

• Analog output modules shall be Galvanic isolated.

• All the Analog output channels shall be floating - point type.

• Analog DC output signals shall in general in the range 4- 20mA, However range shall

be selectable 0 - 20mA, 1 - 5V DC and 0 - 10V DC. The load capacity of the current

signals shall be 750 ohms.

• Output signal shall have a current limitation to 50mA.

4.6. Power Supply module

a. 110V, 50 Hz., 1 Ph. A.C. Power Supply shall be made available by the Owner. Different

voltages required for various other purposes shall be obtained by vendor. 230V, 50 Hz., 1

Ph. A.C. Power Supply shall be provided by Owner for illumination & socket outlet etc. of

MCC Interface PLC Panel.





SP-ELE-003.doc

b. Processor unit shall be provided with separate power supply module.

c. Redundant power supply module shall be wired separately to power distributed board.

d. Each power supply module shall have a LED for health less of the module.

e. Each input/output module rack shall be provided with separate power supply module.

4.7. Communication module

b) Operating speed shall be Minimum 10/100 M bits per seconds (Ethernet) and shall be real

time data transmission between PLCs and TAS PLC. OLM modules for bus connections

shall be considered with bus inside the panels and with provision for connection of

owner’s bus from TAS PLC.

c) System shall be designed as the fault tolerance providing transient error detection,

data protection, secured independence for dual redundancy of its each unit enhance

fail- safe function.

d) Internal bus / communication module shall be redundant. Switching over shall be

automatically.

e) For connection of CIU (for energy monitoring system) to TAS PLC bus RS-485 to

Ethernet converter module shall be provided.

f) All communication interfaces shall be galvanically or optically isolated.

4.8. Spares

a) Installed spare upto 20% shall be provided in input / output modules.

b) Additionally at each location one module of each type shall be supplied to enhance the

system functional requirements for future.

c) Spare slots for installing I/O modules of each type in future.

d) The processor and memory shall have the capability to execute logic for I/O's including 20

% spares.

e) Whenever relays are used to interface process input/outputs with PLC 10% additional

relays shall be provided.

4.9. Self Diagnostic

a) The system shall have an extensive set of self-diagnostic routines which shall be able to

identify the system failures at least upto module level including redundant components and

power supplies.

b) At the local level, failure of a module in any subsystem shall be identified by an individual

LED.

c) Self-diagnostics shall be provided to detect faults (which make the contacts in fail safe

mode) in the input and output modules. Each module shall have separate arrangement for

self-diagnostic facility.

4.10. System Configuration:

The Control and monitoring system shall have system configuration as indicated under Single

Line Diagram of the panels enclosed.





SP-ELE-003.doc

4.11. Wiring & Terminations for PLC

a) All PLC system cabinets shall be completely wired with all modules in place. Inter system

wiring shall preferably be done using ribbon type pre-fabricated cables.

b) All wiring, internal and external to the cabinets, shall be of general-purpose type.

c) All wiring shall be housed in covered non-flammable plastic raceways so arranged for easy

maintenance. Raceways shall have 50% spare capacity.

d) Signal cables/wires shall be routed in separate raceways and not along with power cables.

Power wiring and control wiring should be separated not less than 150mm. If they have to

cross, the crossing should be as close to right angle as possible.

e) All terminals shall be of mechanical screw clamp type with pressure plates. Self-insulating

crimping wire lugs shall be used for all terminations on terminal blocks. Whereas forked

tongue type lugs shall be used for termination on screwed terminals such as on relays, push

buttons, lamp, etc. Size of the terminals shall be 2.5 Sq.mm or of suitable size to accept the

wire gauge of the wire terminated. Terminal block shall be rated for minimum 600V,

10Amp.

f) Each I/O module shall be provided with separate terminals for individual inputs and

outputs. All inter cubicle and internal signal wiring shall be done using minimum 1 sq.mm

stranded copper conductor, and power wiring shall be done using minimum 1.5 sq.mm

stranded copper conductor. All terminals shall be suitable for minimum 2 sq.mm cables.

g) Generally no more than two wires shall be terminated on a single terminal. Additional

terminals shall be used for looping if necessary. Use of shorting links for looping shall be

avoided.

h) Colour code to be followed for panel wiring.

Power Wires - Red, Yellow, Blue for Phases.

Control Wires - Grey.

Neutral Wires - Black.

Ground Wires - Yellow & Green.

i) All electrical terminals and equipment on the panel and other accessories shall be

identified with appropriate tag, cable marker etc.

j) All terminals in a terminal strip shall be identified by their individual numbers located

integral with the terminal itself. Approximately 30 % spare terminals shall be provided in

the marshalling racks.

k) Wiring at terminals shall be identified by the terminal number termination services at the

other end of the wire (cross ferruling). Ferrule shall be used for this purpose. All ferrules

shall be made of non-deteriorating materials. The ferrules shall be firmly located on each

wire so that they cannot move or turn freely on the wire.

l) Data highway & network communication cables shall maintain a minimum separation of

150mm from any AC power cables. Fibre optic cables are excluded from this requirement.

m) Data high way cables shall be suitable for both indoor and outdoor installation. The

communication rates of the data high way cable shall be minimum 10Mbps.

n) Vendor installed cables shall be designed and installed in such a way as to allow cable

disconnection in order to service the equipment. Cables shall not interfere with circuit

board removal.

o) It shall not be necessary to remove power or field wiring to replace a process control or

input/output module.





SP-ELE-003.doc

Attachment – 1 : Table of Compliance



CLIENT :



VENDOR REF.

Spec. Clause

No.

Conforms

Yes/No

Alternative


1

2

3

3.1

3.2

3.3

3.4

3.5

3.6

3.7

3.8

3.9

3.10

3.11

3.12

3.13

3.14

3.15

3.16

3.17

3.18

3.19

3.20

4

4.1





SP-ELE-003.doc

CLIENT :



VENDOR REF.

Spec. Clause

No.

Conforms

Yes/No

Alternative


4.2

4.3

4.4

4.5

4.6

4.7

4.8

4.9

4.10

4.11

Attachment 1:

Attachment 2:




P:\Andheri\IndiaProject\254625 HPCL- Black Oil Terminal\Procurement\Switchgear\04.09.09-For Floating\Editable\L.V.

Swgr\254625-300-SP-ELE-003.doc

Attachment – 2 : Guaranteed Technical Particulars

Doc. No: 254625-300-DS-ELE-004 [Sheets 1 to 11]



Doc No: 254625-300-DS-ELE-004 Rev: C Page 1 of 11


Swgr\254625-300-DS-ELE-004.doc

GUARANTEED TECHNICAL PARTICULARS

Note: Vendor shall submit guaranteed technical particulars separately for each L V Switchgear.

Sr

No Description To be filled in by Vendor

A) GENERAL

1) Manufacturer

2) Place of Manufacture

3) Applicable codes & standards

4) IAC classification for switchgear [as per

latest IEC 62271-200]

5) Type test certificate furnished

6) Documents as per Specification furnished?

B) ENCLOSURE

1) Enclosure material

2) Type & Execution (Form-4b)

3) Thickness of sheet metal mm

4) Degree of Protection

5) Paint Shade

Inside

Outside

6) PMCC/PCC suitable for Busduct Incomer

from Top (Transformer Incomer)

7) Cable entry (Incoming & Outgoing)

8) Minimum Cable alley width mm

9) Material & thickness of gland plates mm

10) Mounting height of components

Minimum

Maximum

mm

11) Overall dimension of Switchgear mm

12) Busduct Entry

13) Switchgear Heat Load for HVAC Watts

C) BUSBARS

1) Rated continuous current

[Main & Vertical]

kA

2) Short circuit rating [1 sec] kA

3) Main Busbar location

4) Busbar material

5) Bus with insulating sleeves

[Material of sleeves]

6) Clearances Ph/Ph, Ph/n & Ph/earth mm






Sr


7) Short circuit current rating for 1 sec kA

8) Final Temperature of Busbars ºC

9) Horizontal Busbar size

Phase

Neutral

mm

10) Vertical Busbar size

Phase

Neutral

mm

11) Busbars support insulator make & voltage

class

12) Spacing between Busbar supports mm

13) Shrouds on Joints & Tap-offs

14) Inter panel barrier

D) AIR CIRCUIT BREAKER

1) Make

2) Type

3) Voltage, frequency & poles

4) Rated current A

5) Short circuit rating kA

6) Sym. interrupting capacity kA

7) Total interrupting time ms

8) Making current (Peak) kA

9) Power Frequency Withstand Voltage kV

10) Lightning Impulse Withstand Voltage kV

11) Anti pumping feature provided

12) Trip-free feature

Provision for pad locking facility in the

“OFF” position

13) No. of auxiliary contacts for owners use

14) Spring charging motor rating at 240V AC VA

15) Time required to charge spring from fully

discharged condition

ms

16) Control Supply voltage(DC) V

17) Maximum tripping coil consumption /ACB VA

18) Maximum closing coil consumption /ACB VA

E) MCCB & MPCB

1) Make

2) Voltage, frequency & poles






Sr


3) Rated current A

4) Short circuit rating kA

5) Sym. interrupting capacity kA

6) Total interrupting time ms

7) Making current (Peak) kA

8) Operating mechanism

9) Trip - free feature

10) Provision for pad locking facility in the

“OFF” position

11) No. of auxiliary contacts for owners use

F) SWITCH FUSE UNIT

I SWITCHES

1) Make

2) Type

3) Duty

4) Rating A

5) Interlocking with Door + Defect

Interlocking facility

6) Padlocking in OFF position

7) Shrouding of Incoming Terminal

8) Rotary / Link Type

9) Single Break / Double Break

II FUSES

1) Make

2) Type

3) Rupturing Capacity

4) Rating A

5) Control Fuse Make

G) CONTACTORS

1) Make

2) Type

3) Service

4) Rating A

5) Duty






Sr


H) OVERLOAD PROTECTION RELAY

1) Make

2) Type

3) SPPR feature

4) Trip class

5) Reset facility

6) CT operated from which rating onwards?

I) EART FAULT PROTECTION RELAY

1) Make

2) Type

3) Rating A

4) CBCT provided

5) Timer provided

6) Reset facility

J) CURRENT TRANSFORMER

1) Make

2) Type & services

3) Voltage & frequency

4) Ratio

5) Rated burden VA

6) Accuracy class

7) Short circuit current rating kA

8) Class of Insulation

9) Shorting link for secondary

K) POTENTIAL TRANSFORMER

1) Make

2) Type & services

3) Voltage & frequency

4) Ratio

5) Rated burden VA

6) Accuracy class

7) Short circuit current rating kA

8) Class of Insulation






Sr


L) PROTECTIVE RELAYS

1) Make

2) Type

3) Control voltage V

M) INDICATING INSTRUMENTS [To be filled for each type of

instruments]

1) Make

2) Size

3) Type

4) Range for Incoming & Outgoing

5) Burden VA

N) WIRING

1) Insulation

2) Voltage class V

3) Size & Colour code

Power Circuits

CT secondary

Control circuits

O) ANNUNCIATION SYSTEM

1) Make

2) Applicable standard

3) Type

4) System Voltage [DC] V

5) No. of windows, Display device, Facia

type and LED colour etc.,

6) Flash rate

7) Response time

8) Operational sequence (Alarm sequence)

9) Power consumption VA

10) Dimensions mm

P) CONTROL SUPPLY

1) Auxiliary Busbar size

110V DC

110V AC

240V AC

mm

2) Control transformer

Ratio






Sr


Rating

Nos/Swgr

3) Provision of standby control Transformer

in each switchgear?

4) Auto-change over provided between

Control Transformers?

5) Sleeving for control Busbars [Material of

sleeves]

Q) SOFT STARTER

1) Make

2) Type of Solid state Soft Starter

3) Frequency Range

4) Starting capacity at maximum rated full

load current Ir [* times Ir for * secs].

5) Allowable no. of starts per hour

6) Overload capacity & duration

7) Selectable Overload Class range

8) Selectable Start/stop mode

[Voltage / Torque ramp]

9) Selectable range of Start Ramp

10) Selectable range of Stop Ramp

11) Control Type

12) Selectable Torque limit range

13) Control of Soft starter with field bus

provided

14) Power circuit continuous Rating [SCRS] A

15) SCR peak inverse voltage V

16) SCR protection fuse rating A

17) Power Factor

18) Efficiency (Converter with Output Filter) %

19) Transient voltage protection

20) Total Harmonic Distortion (THD)

21) Noise Level

22) Type of cooling

23) Protection provided For the Soft starter

24) Requirement of Air-conditioning






Sr


R) EARTHING

1) Earth Bus Size

2) Material

3) Location

4) Provision for Connection to Grid

S) LOAD ON BATTERY

1) ACB Closing Coils VA

2) ACB Tripping Coils VA

3) Burden of Auxiliary Relays (which will

be on Battery)

VA

4) Annunciation system VA

T) VARIABLE FREQUENCY DRIVE

1. VFD for [Motor Details]

Tag No., Description, KW Rating

:

2. Manufacturer :

3. Model No. :

4. Reference standard :

5. Quantity :

6. Type of Solid state VFD :

7. Rated Input Voltage : 415V

8. Rated Voltage Output : * V

9. VFD Rating : * KVA

10. Frequency Range : * Hz

11. Type of Load : 415V, Three phase AC Induction motor

12. Starting capacity at maximum rated full

load current Ir

: * times Ir for * sec.

13. Allowable no. of starts per hour :

14. Overload capacity & duration :

15 Selectable Overload Class range :

16. Selectable Start/stop mode :

17. Selectable range of Start Ramp :

18. Selectable range of Stop Ramp :

19. Control Type :






Sr


20. Selectable Torque limit range :

21. Breakaway Torque :

22. Induced torque pulsation :

23. Control of VFD with field bus :

24. Power circuit continuous Rating [SCRS] : * A

25. SCR peak inverse voltage : * V

26. SCR protection fuse rating : * A

27. Line to line dv/dt at motor terminal : * V/microsec

28. Effective Power Factor of the System :

29. Complete System Efficiency :

30. Speed Regulation :

31. Speed Set Point Resolution :

32. Control speed range :

33. Transient voltage protection :

34. Type of Cooling :

35. Degree of Protection :

36. Harmonics

� Compliance with IEEE 519

� Total Harmonic Distortion (THD)

� Max. total harmonic current distortion

at PMCC

:

:

:

37. Noise Level :

38. Interface provided as per Specification : YES/NO

39. Metering provided as per Specification : YES/NO

40. Annunciations provided as per

Specification

: YES/NO

41. Protection provided as per Specification : YES/NO

42. Incomer section

� CB rating & duty

� Contactor rating & duty

Input

Output

By-pass

:

:

43. Facility to accept thermistor relay output

for all motors in group

: YES/NO

44. Control power transformer rating :

45. Overall dimensions of VFD :






Sr


46. Overall Weight :

47. Type of Mounting Floor/Wall

48. Heat load :

49. Requirement of Air-conditioning : YES/NO

50. Life Expectancy :

U) Interface PLC Panel :

I) General

1) Manufacturer

2) Place of Manufacture

3) Applicable codes & standards

4) Documents as per Cl. 11.0 of Specification

for Major Electrical Equipment furnished?

5) List of Type test certificate furnished

6) List of tests offered at following stages

Factory Acceptance Test

System Acceptance Test

Final Acceptance

II) Enclosure

1) Enclosure material

2) Type & Execution

3) Thickness of sheet metal mm

4) Degree of Protection

5) Paint Shade

Inside

Outside

6) Cable entry (Incoming & Outgoing)

7) Material & thickness of gland plates mm

8) Mounting height of components

Minimum

Maximum

mm

9) Overall dimension of Panel ( L x W x D) mm

10) Future Expansion Provided? Yes/N

o

11) Over all Weight Kgs.

12) Panel Heat Load for HVAC Watts






Sr


13) Power consumption at 110V AC VA

14) No. of Ventilation fan for each Cabinet.

15) Lifting lugs

III) Programmable Logic Controller (PLC)

1) Voltage & Frequency with % Variation V &

Hz.

2) Operating Temperature Range Deg.C

3) Operating Humidity Range %

4) Acceptable Duration of momentary Power

loss

5) Electromagnetic interference Value

6) PLC suitable for specified Plant operating

& Synchronising Philosophy?

Yes/N

o

7) PLC features as per specification Yes/N

o

8) PLC for Dual processor Yes/N

o

9) Total Process Control Requirement from

Instrument Interface PLC Panel possible in

case of failure of Task PLC

Required

10) Provision of Non-volatile Memory Yes/N

o

11) PLC suitable to accept future I/Os as per

spares philosophy

Yes/N

o

12) Power distribution within system as per

specification

Yes/N

o

IV) I/O Modules

1) Mounting of I/O Modules in I/O racks

2) Maximum No. of I/O channels per I/O

card

3) Provision for Status Indication for each

Input / Output

Yes/N

o

4) Protections for I/O Module as per

specification

Yes/N

o

5) Redundancy provided for critical I/Os Yes/N

o

6) I/O modules considered as per spares

philosophy

Yes/N

o

7) Confirmation to spares philosophy as per

specification clause 4.7 provided

Yes/N

o

V) Wiring & Terminations

1) Insulation

2) Voltage class V






Sr


3) Size & Colour code as per specification Yes/No

4) Type of cable for inter system wiring

5) Type of Terminal

6) Provision for 20% spare terminals in

marshalling racks.

7) Separation Between Power & control

wiring

mm

VI) EARTHING

1) Earth Bus Size

2) Material

3) Location

4) Provision for Connection to Grid earthing

5) Earthing Scheme with earthing resistance

furnished?

Yes/No





001.doc

Appendix - F: Specification for DC System




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300-SP-ELE-006.doc

APPENDIX - F

SPECIFICATION FOR BATTERY & BATTERY CHARGER (D.C. SYSTEM)





300-SP-ELE-006.doc


1.0 Scope...............................................................................................................................3

2.0 Technical Specification...................................................................................................3

2.1. Mode of Operation: 3

2.2. Design Criteria 3

2.3. Battery Charger 4

2.4. SMF (VRLA) Battery 7

2.5. D.C. Distribution Board 8

2.6. Component Specification 9

Attachment-1: Table of Compliance 12

Attachment-2: Guaranteed Technical Particulars 13

Attachment-3: Single Line Diagram 14





300-SP-ELE-006.doc

1.0 Scope

1.1 This specification intended to cover Design, Engineering, Manufacture, Assembly, Painting,

Inspection, Testing at manufacturer’s works, Delivery to site inclusive of packing & transportation,

Testing and Commissioning assistance of Battery, Battery Charger & DCDB complete with all

accessories.

1 set of 110V D.C. system (Battery, Battery Charger & DCDB) in accordance with this specification,

standards stated herein and Appendices enclosed herewith, shall comprise of the following:

a) SMF (VRLA) Battery complete with racks & accessories.

b) One No. Float charger.

c) One No. Float cum Boost charger.

d) DCDB

1.2 This specification shall be read in conjunction with Specification for Major Electrical Equipment.

(Specification No. 254625-300-RQ-ELE-001).

1.3 All equipment supplied shall be new and best of their respective kinds and shall be of the class most

suitable for the purpose for which they are intended.

1.4 Modification / changes in components, if any suggested during scrutiny / approval of drawings and

execution of work shall be carried out by successful vendor at no extra cost.

2.0 Technical Specification

2.1. Mode of Operation:

2.1.1 Under the normal conditions, i.e. when A.C. supply is available at Battery Charger input terminals, the

float charger shall supply the continuous D.C. load plus the float/trickle charging current of the Battery.

In addition some of the impulse loads of duration less than a minute shall also be fed by charger.

Therefore, charger shall be designed to meet such momentary overload conditions.

2.1.2 In the event of failure of A.C. supply, the emergency D.C. load shall be supplied by the Battery for the

duration of 2 Hrs.

2.1.3 On restoration of A.C. supply, the Float charger shall supply the load current and Float cum boost

charger shall charge the battery. During such conditions battery remains connected to load through

intermediately tapped cell. Each diode shall be rated to carry the maximum discharge current of the

battery.

2.1.4 An interlock shall be provided such that when boost charger is charging the battery, the float charger

gets disconnected automatically from battery, through D.C. contactor. D. C. contactor shall be rated to

carry safely the various currents of the Batteries. Power supply for D.C. contactor coil shall be derived

from Battery terminals.

2.2. Design Criteria

2.2.1 The battery shall be used to supply protection & control circuits of electrical Breakers, annunciators,

D.C. critical lighting etc. independently of outside power sources. The Battery Backup power shall be

available for 120 minutes in the event of complete power failure.

2.2.2 The battery sizing shall account for suitable temperature correction factors, ageing factors of 1.25,

depth of discharge of 80%.





300-SP-ELE-006.doc

2.2.3 Load details for determining load cycle

Load cycle shall be decided based on the following load details:

A) First minute :

i) 33kV breaker trip coil - 3 nos

ii) LV incomer breaker trip coil - 3 nos

B) Last minute :

i) 33kV breaker closing coil - 3 nos

ii) LV incomer breaker closing coil - 3 nos

C) Continuous load :

i) Emergency lighting load – 1500watts

ii) All indicating lamp, annunciator window, multifunction meter shall be continuous and vendor

to workout in detail to size the battery.

Vendor shall calculate the AH capacity of battery based on the above load details and furnish sizing

calculations and backup documents/graphs, along with the offer.

2.2.4 The Float Charger shall be used to supply normal D.C. loads and float charging current of charged

Battery. The Float cum Boost charger shall be designed to supply boost charging current requirement

of the associated battery as well as to supply normal D.C.Load. After full discharge of battery bank, the

Float Cum boost charger shall be capable of charging the battery to its full capacity in 8 hours duration

while supplying normal D.C.Load. Output voltage shall not vary more than ±10%; Vendor shall specify

output voltage regulator or dropping diode etc. used to achieve the above requirement. The end cell

voltage after discharge shall be limited to 1.75 volts/cell. The rating of battery charger shall be suitable

for the battery size selected. Vendor shall size the Charger, suitable to chosen Battery AH capacity and

furnish charger sizing calculations along with the offer.

2.2.5 Complete Battery charger system including rectifier, battery, static switches etc. shall have 15% spare

capacity for future load growth.

2.2.6 DC distribution board shall be provided to feed various loads. The provision of incoming and outgoing

feeders on DC distribution boards shall be as specified in the enclosed SLD in Attachment-3.

2.2.7 The maximum temperature rise in any part of the equipment as well as that of any component and their

terminals while delivering rated current shall not exceed the permissible limits stipulated in relevant

standards.

2.2.8 The Battery, Battery Charger & DCDB shall be located in substation having clean but hot, humid and

tropical atmosphere. All equipment shall be designed to operate satisfactorily under the ambient and

environmental conditions specified. Batteries shall not be located in separate room.

2.2.9 Maximum noise level of charger shall be less than 80 dB.

2.3. Battery Charger

2.3.1 Constructional features:

a) The charging equipment shall be housed in a free standing, floor mounted compartmentalized

panels having separate compartments for float and float cum boost charging equipment, battery

connection to DC bus, DC distribution equipment, including incoming feeders and outgoing

feeders in different compartments. Panels shall have provision for bottom entry of cables with

removable cable gland plate. (i.e. separate compartmentalised panels for each float charger, float

cum boost charger and DC distribution).





300-SP-ELE-006.doc

b) The panel shall be of CRCA sheet steel construction and provided with concealed hinges.

Adequate ventilating grills or louvers with fine brass wire mesh shall be provided. Thickness of

sheet steel shall be at least 2.0 mm. Degree of protection provided by the enclosure to the

internals of charger shall be IP-42.

c) The instruments, switches and indicating lamps shall be flush mounted on the front panel.

d) Suitable neoprene rubber gaskets shall be provided all around doors and cover plates, between

two shipping sections, two charger sections, two panel sections, for making charger construction

dust and vermin proof.

e) All PCBs used in the charger shall be made of glass epoxy material. Electronic cards shall be

plug in type and shall be mounted on standard racks. Rack shall have PCB guides which shall

allow the insertion of PCBs smoothly without requiring force. Racks shall be mounted on hinged

pivot to enable the rack to be turned for access to back side terminals. PCBs shall include status

indicating LED lights and test connections in the front to facilitate fault diagnosis. PCBs shall be

identified with proper permanent labels as per approved drawings.

2.3.2 Operation

a) The Battery charger shall be with static Silicon Controlled Rectifiers (SCRs), It shall be

complete with filter circuits to limit the ripple within ±1% (RMS) in the DC output. The rectifier

transformers shall be of dry type, AN cooled, vacuum impregnated double wound with adequate

number of primary taps. Transformer shall be Class–B insulation having a continuous rating at

least 125 % of the rating of the charger. Reactance of transformer shall be suitable to take care of

regulation and surges.

b) Battery charger shall be designed for a maximum voltage ripple of ±1 % (rms) when connected

to a battery with an ampere-hour capacity equal to or greater than four times the ampere capacity

of the charger.

c) The rectifier-charger shall be of the current-limiting type set not higher than 125 % for the solid

state design.

d) Charger shall be current limited to both the float and equalize positions in order to protect the

equipment from a short circuit on the load side.

e) The rectifier-charger shall have a minimum power factor (PF) of 0.8 under the following

operating conditions:

• -15 % of the rated input voltage

• -5 % of the rated frequency

• Full rectifier output

f) A walk-in circuit shall be provided to limit in-rush current to 110 % of rectifier/charger full-load

current.

g) The RMS sum of all harmonics in the input waveform shall not exceed 10 % of the RMS value

of the fundamental harmonic with the system operating at rated voltage and current.

h) The charger output shall be filtered to eliminate any harmonics superimposed on the rectifier

output voltage.

2.3.3 Voltage Regulation

a) The float charger shall have both auto and manual voltage regulation arrangements with

provision of selector switch. Output DC voltage shall not vary beyond ±1% of the set value when

controlled through AVR with load varying from no load to full load simultaneously with

specified fluctuations in input voltage and frequency.





300-SP-ELE-006.doc

b) Charger output voltage shall vary no more than ±10 ℅ as a result of a transient 4,000-volt peak

lasting 100 microseconds with 40-ohm source impedance, the batteries, and the full load

connected.

2.3.4 Controls

a) The Float cum boost charger shall be complete with manually controlled motorized, variac and

three phase rectifier bank. The voltage regulation shall be uniform and step less throughout the

voltage variation range. For achieving this, voltage Raise/Lower push buttons shall be provided

on front of float cum boost charger section. An interlock shall be provided in the float cum boost

charger so that float cum boost charger can be made ‘ON’ only when the autotransformer is in

minimum position.

b) The float charger controller shall have built in load limiting feature, which will limit the load on

charger in the event of overload and reduce the output voltage in order to transfer the load to the

battery. The current setting of load limiting device shall be uniformly adjustable between 100%

and 150% of full load.

c) Charger shall be provided with all required float and equalizer controls. Chargers shall be

provided with an automatic charging control circuit to switch the rectifier output automatically

from float charging to equalize charging if the charger is in current limit for more than 30

seconds. Equalize charging time shall be controlled by a timer that has an adjustable setting from

8 to 12 hours.

2.3.5 Protection, Indicators & Alarms

a) The rectifier equipment shall be complete with heat sink and have its own protective devices. In

addition, surge protection devices and fast acting HRC fuses suitable for rectifier protection shall

be provided in each arm of rectifier connections.

b) Battery charger shall be furnished with the manufacturer's standard indicating and Audio &

Visual alarm devices, which shall include, but not be limited to, the following:

• AC circuit breaker and AC power-on light

• AC power-failure relay for remote alarm

• AC under voltage

• DC disconnect switch, without over current protection

• DC ground-detection lights with relay for remote alarm contacts

• DC under voltage & over voltage.

• DC positive to earth and D.C. negative to earth faults.

• Low DC-voltage relay for remote alarm

• DC voltmeter and ammeter with 2-percent accuracy

• Charger failure alarm (loss of DC current)

• Float & Float cum Boost charger rectifier fuse failure.

• Float/ Float cum Boost charger D.C. side output fuse failure.

• Float charger overload.

• Float cum Boost charger overload.

• Battery Fuse Failure

• Float and equalize potentiometer and selector switch to override automatic charge control





300-SP-ELE-006.doc

• Equalize pilot light

• Battery-disconnected relay for remote alarm

• Chargers-out-of-balance relay for remote alarm (for load sharing chargers)

• Unit of common alarm contact for remote indication

c) Alarms shall have local indication on the battery charger.

d) Indicator lamps on the charger panel shall be operated at no more than 75 ℅ of the rated voltage

of the lamp for extended life.

e) If cooling fans are approved, an alarm shall be provided to signal a loss of ventilation. A sail

switch upstream of the cooling fans shall activate the alarm. The sail switch shall be mounted

inside the charger enclosure.

f) Alarm contacts shall be rated for 5 amps at 110 volts DC for connection to a remote annunciator.

Isolated alarm contacts shall be provided. The contacts shall open to actuate the alarms.

2.4. SMF (VRLA) Battery

2.4.1 General Features

a) The chargeable batteries shall be Lead acid maintenance free (SMF-VRLA). type of nominal

voltage specified in SLD in Attachment-3. The end cell voltage after discharge shall be limited to

1.75 volts/cell. Batteries shall not require any water topping up and shall emit no corrosive fumes

or gases under normal operating conditions.

b) The batteries shall be supplied along with the necessary mounting racks or sheet steel enclosure

complete with the provision for clamping the cables. Battery racks shall be of steel frame with

epoxy painted/ PVC lined.

c) Vendor shall indicate the ventilation requirements if any, for the battery.

2.4.2 Constructional features

a) Electrolyte

The Electrolyte shall be of battery grade sulphuric acid.

b) Plates

The Positive & Negative plates shall be constructed of heavy duty lead alloy grids type .The

plates shall be corrosion resistant & shall have low self discharge properties. The plates shall be

designed for maximum durability during all service, conditions including high rate of discharge

and rapid fluctuation of load.

c) Containers & Covers

Each cell shall be assembled in high grade, flame retardant polymer or moulded hard rubber

container. The container shall be leak proof, non-absorbent, shock absorbing not liable to

deformation within the range of working temperature and not affected by the acid. Electrolyte

high-level and low-level lines shall be marked on at least two of the four sides of a cell and

visible from the front of the completed assembly. A permanent airtight seal shall be provided

between the cover & container to stop electrolyte & air leakage. The container shall be designed

to withstand the pressure caused by charging & discharging characteristics of the battery.





300-SP-ELE-006.doc

d) Cell lids

Cells lids shall be of glass, plastic or ebonite complete with either suitable rubber gasket for

closed type or bituminous sealing compound for sealed type of containers.

e) Safety Vents

Flame arresting vent plug housing the safety valve shall be provided. The vent plugs shall be

explosion proof, self resealing, resisting acid overflow and pressure regulating types. The valve

shall be automatically sealed to prevent diffusion of air.

f) Separators

Separator between plates shall permit free flow of electrolyte and shall maintain the electrical

insulation between the plates. Separators shall be of wood or high density absorbent Glass MAT

non woven with excellent porosity.

g) Connectors

Lead coated copper connectors shall be furnished to use as inter cell, interior, inter tier and inter

row connectors. The lead plating shall be adequate to ensure proper protection against corrosion

during the entire life of the battery. Nuts, bolts and washers shall be of lead coated copper.

h) Terminal Posts

The cell terminal posts shall be provided with connector bolts and nuts, effectively coated with

lead to prevent corrosion. Positive and negative terminal posts shall be clearly and indelibly

marked for easy identification. Lead plated plate, tubular tinned copper lugs, bolts, nuts, washers

etc. shall be furnished for connection of outgoing purchaser’s aluminium conductor cables.

Intermediate posts for easy termination of purchaser’s cable shall be provided.

i) Cell Insulators

The cells shall be supported on hard rubber/PVC pads, fixed on the rack with adequate clearance

between the adjacent cells.

j) All hardware necessary for complete assembly of system shall be provided.

k) A disconnect switch shall be provided near battery bank for isolation of batteries.

2.5. D.C. Distribution Board

2.5.1 Constructional Features

a) D.C. Distribution Board shall be a separate panel, but shall form an integral part of a panel

board, when placed by the side of the charger panels.

b) Cubicle door shall have rolled edges with suitable neoprene gasket to make it dust proof. The

door shall be provided with lock and key arrangement to prevent unauthorised opening of the

door.

c) Outgoing MCB/Fuse mounting plates shall be adequately braced to avoid wobbling during

pulling or insertion of fuses.

d) DCDB shall comprise of double pole MCBs as specified in SLD attached in Attachment-3.

2.5.2 Bus bars

a) Busbars in the battery charger and DCDB shall be Aluminium liberally sized for the specified

current rating (both short circuit and continuous currents.)

b) The main horizontal busbars of distribution boards shall be located in a separate chamber

extending over entire length. Bus bar chamber shall have separately screwed covers. All bus

bars, links, etc. shall be provided with heat-shrinkable insulating sleeves to prevent accidental

contacts.





300-SP-ELE-006.doc

c) Power shall be distributed to each circuit in each section by flexible copper conductor cables.

d) Buses shall be spaced with adequate clearances between positive and negative and between

positive/negative and ground. Minimum clearance shall not be less than 25 mm.

e) Bus supports shall be of arc resistant, non tracking low moisture absorption type moulded

insulators of high impact strength and high Creepage surface. Material of bus supports shall be

cast epoxy resin/DMC/SMC. Supports for each bus shall be independent from support for other

phase/pole busbar.

f) All bus works shall be braced to withstand stresses due to short circuit current without damage.

g) Colour code shall be used to identify the busbars as per relevant standards. Suitable sleeving

shall be provided over busbars for insulating the same as secondary insulation.

2.5.3 Low Voltage Disconnect

DC Power System shall be supplied with a low voltage disconnect which will automatically

disconnect the load from the battery upon low voltage to prevent the battery from becoming

completely discharged on charger malfunction or failure. The low voltage disconnect shall have

an adjustable trip point and shall be capable of breaking full DC load current.

2.6. Component Specification

2.6.1 Switches/ MCCBs/MCBs

a) Switches or 4 pole MCCBs as per SLD shall be provided for incomer. MCCBs/A.C. Switches shall

be four pole, air break and heavy duty type, capable of safely breaking the full load current of

associated feeder. A.C. incoming MCCB/Switch shall have a quick-make, quick-break mechanism

operated by a suitable external handle complete with position indicator.

b) MCBs for outgoing feeders shall be double pole type, and shall be suitably rated to make and break

and carry the rated D.C. current.

2.6.2 Fuses

a) Fuse shall be HRC, link type, with a maximum rupturing capacity suited for rated voltage.

Rewirable fuses shall not be acceptable. Fuses provided for protection of rectifier shall be of the

type suitable for the intended duty.

b) Fuses shall be furnished complete with fuse bases and carriers of such design as to permit easy

replacement of fuse elements. Visible indication shall be provided on blowing of the fuse.

c) The incomer fuse rating shall be so chosen as to provide discrimination with feeder fuses.

2.6.3 Contactors

Contactors shall be air break type with 2 NO + 2NC auxiliary contacts. Utilisation category shall

be AC-1 or DC-1. Continuous current rating of contactors shall be at least 15% higher than full

load current of connected equipment.

2.6.4 CTs and PTs

CTs and PTs shall be of epoxy resin cast type. Accuracy class of the metering CTs and PTs shall

be 1.0.

2.6.5 Relays

Relays shall be microprocessor/static type. Further, relays shall be draw out plug in type and shall

be provided with hand reset type flag indicator. Thermal overload relays shall be ambient

temperature compensated and shall be hand reset type.





300-SP-ELE-006.doc

2.6.6 Meters

a) Meters shall be square type, flush mounting.

b) Each meter shall be provided with zero adjuster on the front.

c) Accuracy of the meters shall be ± 3%.

d) Minimum size of the meters shall be 96 mm x 96 mm and meters shall be of taut band type.

e) Meters shall be operated from outputs of CTs/PTs/DC shunts as required.

2.6.7 Following control switches/ pushbuttons to be provided as a minimum.

a) ON /OFF control switch for AC supply to charger.

b) Auto / Manual selector switch to select mode of operation.

c) Potential meters for voltage & current adjustment in float mode.

d) Potential meters for voltage & current adjustment in Float cum Boost mode.

2.6.8 Push Buttons and Indicating Lamps

a) Push Buttons and Indicating Lamps shall be panel mounting type.

b) Lamps shall be clustered LED type with low watt consumption.

c) Push Button actuator shall be shrouded with dust tight rubber grommet cover. Associated springs

and contacts shall be of robust construction. Push Button shall be provided with integral

escutcheon plates with 2NO + 2NC contacts rated to make, break and carry 5A DC at 110V, 30V

or 220V DC.

2.6.9 Space Heaters & Panel

a) Each vertical section of panel shall be provided with thermostat controlled space heaters rated 240

volts, single phase, 50 Hz. The heaters shall have individual ON-OFF MCB.

b) Wiring of space heaters in each board shall be grouped and brought out to easily accessible

terminals.

c) Cubicle illumination lamp along with MCB operating on 240V, 1 phase supply shall be provided.

Lamp operation shall be controlled through door limit switch.

d) 240V supply shall be suitably tapped by vendor from incoming supply.

2.6.10 Wiring

a) The wiring shall be complete in all respects so as to ensure proper functioning of control,

protection, interlocking and measurement schemes.

b) Control wiring shall be done with flexible, heat resistant, switchboard wires; 650/1100V grade,

multi-stranded copper conductor. Each wire shall be identified at both ends using engraved ferrules

designation in accordance with the approved wiring diagram. Interlocking type plastic ferrules shall

be used for identification. Minimum size of the wires used for plug cord for electronic cards shall

be 0.5mm2 copper. Wires shall not be spliced or tapped between terminal points. Wherever wires

cross sheet steel barriers rubber grommets shall be provided around holes in sheet steel barrier. All

internal wires shall be terminated with tinned copper crimping type lugs.

2.6.11 Cable Termination

a) Distribution boards shall be designed to facilitate cable entry from bottom. Removable undrilled

plates shall be furnished for this purpose. Sufficient space shall be provided to avoid sharp bending

and for ease of connection, a minimum space of 300mm from the gland plate to the nearest terminal

shall be provided.





300-SP-ELE-006.doc

b) Multiway, clip on type terminal blocks complete with screws, nuts, washers, and marking strips

shall be furnished for terminating the internal wiring and outgoing control cables. Stud type

terminals shall be provided for power cables.

c) Each control terminal shall be capable of connecting 2 nos. 2.5 sq. mm copper wire at one end

without any damage to the conductor or any looseness of connection..

2.6.12 Ground Bus

a) Copper ground bus of size 25mm x 6mm shall be furnished along the entire length of each section

of Battery Charger and DCDB.

b) Each equipment of board shall be connected directly to the ground bus by two separate and distinct

connections. Doors of charger shall be effectively earthed through flexible copper wires of

adequate size.

c) Grounding terminals on the ground bus shall be provided at two points of the Battery Charger.

Connectors shall be provided at either ends for connection to Purchaser’s ground conductor.

d) DC Power shall be Ungrounded.





300-SP-ELE-006.doc

Attachment-1: Table of Compliance



CLIENT :

M/s. HPCL


VENDOR REF.

Spec. Clause

No.

Conforms

Yes/No

Alternative


1

2

2.1

2.2

2.3

2.4

2.5

2.6

Attachment 1:

Attachment 2:

Attachment 3:





300-SP-ELE-006.doc

Attachment-2: Guaranteed Technical Particulars

[Doc. No. 254625-300-DS-ELE-007 [Sheets 1 to 5]




P:\Andheri\IndiaProject\254625 HPCL- Black Oil Terminal\Procurement\Switchgear\04.09.09\PDF\Battery & Battery

Charger\254625-300-DS-ELE-007.doc

Attachment-2

GUARANTEED TECHNICAL PARTICULARS

Sr.


A) GENERAL

1. Manufacturer

2. Country of Manufacture

3. Applicable codes & standards

4. List of Type test certificates furnished

5. List of Routine test offered

6. Documents as per Cl.8 of Specification

furnished?

7. Noise Level dB

8. Radio frequency interference value

9. Heat dissipation from Watts

a) Charger Panel

b) DCDB Panel

c) Batteries

10. Indicators, Alarms & Meters as per Specification.

B) Float & Float Cum Boost Charger (vendor to fill data for both type

of Chargers separately)

1. Type

2. A.C. Input Supply data V & Hz

3. Maximum kVA input to charger

4. Mode of Output Voltage

5. D.C. output voltage range

6. Load Current Range

7. Maximum output Current of Charger Amp

8. Method of Voltage control

9. Range of Output Voltage Variation

10. Acceptable transient voltage variation in D.C.

output

11. Maximum Ripple content output of DC Voltage ± % Rms

12. Response time of charger Sec

13. Cable entry to battery charger

14. One second short circuit withstand capacity of

DC Busbars

15. Overall Power Factor of charger

16. Efficiency (at 20% to 100% load) %






Sr.


17. Type of load limiting features Provided

18. Transformer

a) Make

b) Type

c) Rating

d) Type of cooling

e) Vector representation

f) Voltage Ratio

19.. Rectifier

a) Make

b) Type

c) Rating

20. Blocking Diode/Thyristor

a) Make

b) One minute rating

c) One Hour rating

d) Voltage rating

21. Automatic Voltage Regulator

a) Make

b) Time constant of AVR

22. Overload Capacity

a) One minute

b) Half an Hour

c) One Hour

23. Maximum temperature rise over ambient at

rated load of the following:

a) Rectifier Transformer

b) Rectifier Cells

c) Smoothing Reactor

d) Resistances

e) Thyristor

f) Busbars

24. Charger Sizing Calculation Furnished?

C) Battery

1. Manufacturer’s Name

2. Type / Catalogue No. of Cell






Sr.


3. Number of cells in Bank

4. Intermediate Tapping provided?

5. Battery cells arrangement

6. Battery housing

7. Nominal Cell Voltage Volts

8. Cell end Voltage at the end of

a) Full Charging Volts

b) Full Discharge Volts

9. Open Circuit Voltage at the end of Full Charging

10 Equalising Charging Voltage Volts

11.

Calculated AH capacity for enclosed load cycle

after applying temperature correction and ageing

effect

12. Temperature Correction factor

13. Ageing Factor

14. Cycle life of cell (for 80%,50%,20% DOD)

15.

AH capacity at 20 hours discharge rate

after applying temperature correction & ageing

effect

a) Initial

b) Rated value

c) At the end of life

16. AH capacity at 450 C

Discharge characteristic curves/

Table to be enclosed

a) 8 hour discharge rate Amp

b) 2 hour discharge rate Amp

c) 1 hour discharge rate Amp

d) Half hour discharge rate to Amp

e) One minute discharge rate to Amp

17.

Expected Fault Current for dead Short Circuit

across battery terminals when battery is at full

charge

kA

18. Time to charge the battery to Nominal Voltage

from End Cell Voltage

19. Expected life of battery Years

20. Type of connection between cells

21. Maximum Storage period allowed before first

charge

22. Recommended charging rate.

Float charging value






Sr.


a) Voltage Volts

b) Current Amp

Float Cum Boost charging value

a) Voltage Volts

b) Current Amp

23. Initial charging current and duration

24. Total internal resistance of battery set Ohm

25. AH %efficiency at rated load %

26. Dimensions

a) Each cell L x W x H mm

b) Complete battery L x W x H mm

c) Cubicle/Rack L x W x H mm

27. Weight [battery + Rack/cubicle] Kgs.

28. Ventilation requirement

29. Curves/Table showing following

a) Cell voltage vs. time at different charging

currents

b) Cell voltage vs. time at different discharge

current.

c) AH capacity vs. years of services

30. Earthing

31. Battery Isolation MCCB rating Amp

32. Battery Sizing Calculation Furnished?

C) DCDB

1. Whether DCDB integral to Charger Panel?

2. Construction

3. Rated voltage

4. Continuous current

5. Material of busbars

6. Incoming as per SLD

7. Outgoings as per SLD

8. Cable entry for power & control cables

9. Busbar

a) Clearance

b) Material & Rating

c) Sleeved Busbar Material

10. Inter connecting Cables






Sr.


a) A.C. input cable

b) Cable between battery and battery charger.

c) Cables between Battery & DCDB

d) Outgoing cables from DCDB

e) Connecting links for battery to charger

connection

11. Construction for both Battery Charger & DCDB

Panel

a) Sheet steel thickness

b) Degree of protection of enclosure

c) Painting Treatment

d) Colour Shade

-Interior

-Exterior

12. AC Switch Fuse Unit

a) Make

b) Rating for Float Charger Amp

Float Cum Boost Charger Amp

13. DC. Switch and Fuses

a) Make

b) Rating for Float Charger Amp

Float Cum Boost Charger Amp

14. Panel Space Heater

15. Earth Bus

16. Dimensions (L x w x H) & Weight

a) Charger Panel mm & Kg

b) DCDB mm & Kg

c) Overall mm & Kg





300-SP-ELE-006.doc

Attachment-3: Single Line Diagram

Drg No: 254625-300-ELE-4105





001.doc

Appendix - G: Recommended List of approved vendors

33 kV Switchgear : Siemens / ABB / AREVA / Schneider

PMCC, PCC & MCC : Siemens / L&T / Schneider / ABB

ACB : Siemens / L&T / ABB / Schnieder

MCCB : L&T / Areva / ABB / Siemens / Merlin Gerin

MPCB : L&T / Areva / ABB / Siemens

SFU : L&T / Siemens / ABB

VFD : L&T / Siemens / Schnieder / ABB

Softstarter : L&T / Siemens / Schnieder / ABB

PLC : ABB / Siemens / Schnieder / GE

Protection Relays, Aux. Relays : Areva / ABB / Siemens / SEL

LT contactor & O/L Relays : Siemens / Tele-mechanic / L & T /Control & Switch Gear /

SEL

Selector switches / Control switches : GECALSTHOM / KAYCEE/ ABB / Siemens / Rishab.

LT, CTS : Automatic electric / ECS / KAPPA electricals / Pragati /

Gemini

PTs : Pragati / KAPPA electricals / ECS / Gemini

Annunciators : GEC / ALSTOM/ Yashmin / Bharani Electronics / MECO /

Minilec

Indicating Meters : Automatic electric industrial Meters Pvt. Ltd., / IMP / MECO

/ RISHAB / Enercon / L&T

Microprocessor Based Meters : ENERCON / ABB / Siemens / L&T

Integrating meters : IMP / BHEL / Universal Instruments / AE / L&T

Indicating lamps (LED type only) &

Push buttons

: GECALSTHOM/ Siemens / L & T / Telemecanique / Teknic

Charger / Rectifier : Amar Raja Power Systems (P) Ltd / HBL-Nife Power

Systems Ltd / Universal Industrial Products / Mass Tech

Control

Batteries : Amar Raja / HBL Nife / Exide / AMCO / Standard

MCB : L&T / ABB / Siemens / Merlin Gerin / MDS





001.doc

Appendix - H: Drawings & Single Line Diagrams

1). Equipment Layout : Drg. No.-254625-300-ELE-4203-Rev.B

Drg. No.-254625-300-ELE-4204-Rev.B

2). 33kV SLD : Drg. No.-254625-300-ELE-4101-Rev.B

3). PMCC SLD : Drg. No.-254625-300-ELE-4102-Rev.E-Sheet 1

to 4

4). MCC SLD : Drg. No.-254625-300-ELE-4103-Rev.B-Sheet 1

to 3

5). L.V. Switchgear Schematics : Drg. No.-254625-300-ELE-4107-Rev.BSheet 1

& Interface Block Diagram to 6

6). D.C. UPS SLD : Drg. No.-254625-300-ELE-4105-Rev.B

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