Renovation of Substation – 2 including Replacement of Oil ...

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MAZAGON DOCK SHIPBUILDERS LIMITED (Formerly known as Mazagon Dock Ltd.)

CIN : U35100MH1934GOI002079 (A Government of India Undertaking)

Shipbuilders to the Nation Dockyard Road, Mazagon,

Mumbai 400 010. INDIA

Renovation of Substation – 2 including Replacement of Oil Type

transformers with Dry type Transformers at South Yard, MDL,

Mumbai.

VOLUME-IV

TECHNICAL SPECIFICATION &

PREFERRED MAKE

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TECHNICAL SPECIFICATIONS OF

SUBSTATION & ASSOCIATED

ELECTRICAL WORKS

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VOL IV - TABLE OF CONTENTS

Sr. No Description Page No

TECHNICAL SPECIFICATIONS FOR DRY TYPE TRANSFORMER 5

1 Scope of Work 5

2 Codes & Standards 8

3 Design Basis 9

4 SERVICES CONDITION 10

5 Other Design Parameters 10

6 Construction & Design 11

7 Fittings & Accessories for each of Transformer 15

8 Submittals 17

9 Submission of drawing to MDL/consultant approval prior to manufacturing 17

10 Inspection & testing during manufacturing of both transformers 17

11 Pre-dispatch inspection & testing of both transformers 18

12 Packaging 19

13 Annexure to be submitted along with technical bid 19

14 Deviations 19

15 Guarantee 19

16 Documents to be supplied at the time of delivery 19

17 QAP shall include following 19

18 Guaranteed technical particulars for distribution transformers 22

TECHNICAL SPECIFICATIONS FOR POINT WIRING 27

1 Scope of Work 27

2 Code & Standards 27

3 System of Wiring 27

4 General 27

5 Material 27

6 Switches 28

7 Socket 28

8 Inspection and testing 29

9 Method of measurement 29

10 Transport, delivery and storage 29

11 Guarantee and warranty 29

TECHNICAL SPECIFICATIONS FOR SUPPLY OF LIGHT FIXTURE 30

1 Scope of Work 30


3 Technical requirements 30

4 LED Lamps 30

5 Luminaries 30

6 LED down lighter light (ip43) tech specs 31

7 Drawings & Information 31


9 Guarantee and Warranty 31

10 Propeller Exhaust Fan 31

TECHNICAL SPECIFICATIONS FOR SUPPLY OF EARTHING SYSTEM 32

1 Scope of Work 32


3 Installation of system 32

4 Plate Electrode Earthing 33

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TECHNICAL SPECIFICATIONS FOR LT XLPE CABLES 35

1 Scope of Work 35


3 Technical Requirements 36

4 Drawings & information 37

5 Inspection and testing 37

6 Routine test 38

7 Type Test 38


9 Data sheet for cables 38

TECHNICAL SPECIFICATIONS FOR HT XLPE CABLES 39

1 Scope of Work 39

2 General Description 39

3 Material and Construction 39

4 Core identifications 39

5 Packing 39

6 Installation 40

MAKE OF MATERIAL 40

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TECHNICAL SPECIFICATIONS FOR DRY TYPE TRANSFORMER

1.0 Scope of Work

1.1 Survey of site, design, manufacture, pre-dispatch testing conforming to relevant IS standards,

packing, forwarding, transportation & delivery at MDL, transportation to erection site &

properly unloading, on-site installation & testing, commissioning and setting to work of 2 nos.

2000 kVA rating, 11kV / 433V, 3 ph, copper winding, Cast resin, Air cooled , dry type

distribution Transformers conforming to IS 2026 & IS 11171 suitable for 11 kV, 50Hz distribution

system and indoor use.

1.2 All necessary works including the associated civil work (such as but not limited to foundation,

support railing for wheels, making of earth pits & earthing grid) & electrical works (such as but

not limited to disconnecting & removing existing HT cable, LT bus duct at both ends, supply,

laying and terminating new HT XLPE insulated, 300sqmm aluminum, armored power cable on

primary side (if required) and connection with existing bus duct including supply of additional

bus duct sections(if required) on LV side using palm connectors along with flexible links of thin

plates of copper (3 phase & neutral), earthing connection etc. for installation & commissioning

of both transformers shall be in supplier’s scope.

1.3 Offered transformers shall conform in all respects to high standards of engineering, design and

workmanship shall conform to relevant IS standards with latest amendments thereof and shall be capable of performing in continuous & satisfactory operation in the actual service

conditions at MDL’s site in a manner acceptable to MDL. Offered Transformer shall have

sufficiently long service life as per statutory requirements. The transformer shall be complete

with all components / parts necessary for their effective and trouble-free operation. Such

components / parts shall be deemed to be within the scope of bidder’s supply irrespective of

whether those are specifically brought out in this specification or not.

1.4 The transformers and accessories shall be designed to facilitate operation, inspection,

maintenance and repairs. The design shall incorporate every precaution and provision for the

safety of equipment as well as staff engaged in operation and maintenance of equipment.

1.5 Prior to bidding, firm’s representative shall visit the site of installation, take site measurements to

ensure that the offered transformer can be designed to accommodate & installed at the site,

considering the available space restrictions & compliance to statutory requirement as per

relevant & latest Indian Electricity Rules & CEA Regulations.

1.6 The requisite certification from Government Electrical Inspector with all arrangements, cost &

expenses shall be in the supplier’s scope.

1.7 Connection of both transformers to the existing LT bus ducts is in the suppliers’ scope. Supply &

installation of additional bus duct sections of same make & model of existing one &

connection to both transformers, to meet the statutory space requirement around each of the

offered HT transformers is also in the suppliers’ scope. The details of existing LT bus duct are as

follows:

Make Schneider Electric, Type: Non phase segregated sandwich type LT bus duct, System:

3P4W with 50% internal earth, Rated continuous current: 2500Amp, Rated 1 sec S.C. withstand

50kA, IP65, Bus bars: High conductivity electrolytic grade copper, Enclosure material:

Galvanized Steel, Provision for earthing on both side, paint shade: RAL 7032. Length: As per site

requirement to meet the statutory space requirement around each of the offered HT

transformers, taking into account the dimensions of the offered transformer & site restrictions.

1.8 Following Tests shall be carried out on both transformers prior to the energizing of Transformers

at installation site:

1. Insulation Resistance Value by HV Insulation Tester

2. Back charging of transformer from secondary side

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1.9 OEM’s engineer shall supervise transformer energizing for 1 day for each transformer.

1.10 Disconnecting of existing 2 nos. transformers, associated old power cables (at both ends), LT

bus ducts also shall be in the supplier’s scope. Disconnected transformers shall be lifted &

shifted away from the site by Electrical Contractor as per instructions by MDL Authorities. Crane

facility for unloading, lifting & shifting of existing as well as new transformers shall be in

Electrical Contractor’s scope.

1.11 METHODOLOGY OF DISMANTLING EXISTING TRANSFORMER AND ERECTION OF NEW

TRANSFORMERS SHALL BE CARRIED OUT IN FOLLOWING STEPS:

i. Procurement of Dry Type Transformer-1 to MDL Site.

ii. Transfer the Load of Existing Transformer-1 to Transformer-2.

iii. Dismantling of existing Transformer before 7 days of delivery of New Transformer-1.

iv. Completion of Transformer room civil works as per approved drawing.

v. Installation of New Transformer-1.

vi. Transfer the Load of Existing Transformer-2 to Newly installed Transformer-1.

vii. Procurement of Transformer-2 to MDL site.

viii. Dismantling of existing Transformer before 7 days of delivery of New Transformer-2.

ix. Completion of Transformer room civil works as per approved drawing.

x. Installation of New Transformer-2.

xi. Transfer 50% Load on newly installed Transformer-2.

Delivery of both Transformers shall be planned according to above mentioned stepwise

procedure. Since there is Space constraint in MDL premises, Storage of Transformer is not

possible, Hence Installation of New Transformer shall be commenced on the same day of

receipt of transformer at MDL Site.

1.11.1 Dismantling of existing transformers:

The following are recommended steps for decommissioning a unit and taking out of service:

i. Shut down the low-voltage.

ii. Shut down the high-voltage.

iii. Secure the transformer to prevent incidental activation by unauthorized persons.

iv. Allow the transformer to cool down

v. Disconnect the connections on the low-voltage side from the transformer

vi. Disconnect the connections on the high-voltage side from the transformer

vii. Disconnect the connections on any provided additional components from the transformer viii. Disconnect the ground terminal from the transformer

Dismantling shall be planned according to Delivery of New Transformer. At first, Dismantling of

Transformer-1 shall be taken place, & the Load shall be transferred to Transfomer-2. Post

dismantling, the Transformer shall be shifted to desired location as per Client’s instructions. For

erection of new Transformer, Respective room shall be thoroughly cleaned, and all the

necessary civil works such as construction of Transformer foundation, Trench etc., shall be

completed as per the approved drawings & instructions of Client / Consultant representative.

1.11.2 At first, Transformer-1 shall be delivered to MDL site. Delivery of New Transformer-2 and

Dismantling of Existing Transformer-2 shall be planned in accordance with successful

installation & commissioning of Transformer-1 and shifting of Entire Load on newly Installed

Transformer. Dismantling of existing Oil type Transformer-2 shall be carried out before 7days of

delivery of Transformer-2. Following points shall be taken care at the time of Transformer

receipt at Site.

1) When a transformer arrives at site a careful external inspection must be made of the unit,

its cooling system and all sealed components, referring to the general arrangement

drawing and the shipping list.

i. Inspect all packing cases and loose components for damage or missing items.

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ii. A record of damage must be prepared in conjunction with other participants and

supplier representative. Minor damage which may appear unimportant should also be

recorded.

iii. Confirm that case numbers match with the packing list. Check their contents tally with

the packing list if the packing case is damaged.

iv. Winding Temperature indicator shall be checked for any damage

v. Fill in the check list for external as well as internal inspections.

2) Unloading of transformers:

a) The following should be avoided during the unloading process

i. The transformer imbalance (Maximum 10 degree)

ii. Abrupt movements

iii. Impact against the ground

The transformer should be unloaded from trailer by using wooden sleepers and rails

for dragging the transformer to its plinth.

b) Considerations before unloading

i. Availability of access road between unloading point and plinth.

ii. Ensure overhead crane capacity for weight of main unit.

iii. Readiness of foundation

iv. Keep under base of main unit at least 300 – 400 mm above ground level by providing wooden slippers to facilitate jacking.

v. Remove lashing before unloading.

c) Unloading from Trailer

i. Unload main unit only on wooden slippers

ii. Jack the transformer at jacking pad only.

iii. Ensure simultaneous operation of all 4 jacks.

iv. Use only haulage lugs for hauling.

v. Ensure capacity of winches and wire ropes to be used for haulage.

vi. Do not use chain pulley block in place of winches.

3) Storage of transformers:

The transformer should be placed in a clean, dry room where a uniform temperature can

be maintained as best as possible because fluctuating temperatures can cause

condensation issues. The floor on which the transformer is being stored should be resistant to the upward migration of water vapor. Precautions should be taken to prevent storage in

an area that water could be present, such as roof leaks, windows, etc. Condensation or

absorption of moisture can be greatly reduced by the installation of space heaters

(optional). If the transformer is not furnished with internal space heaters, then external,

portable heaters can be used. A basic rule to mitigate condensation in the unit is to keep

the transformer enclosure 5-10 degrees above ambient temperature. Lamps or heaters

should never come in direct contact with the transformer coil insulation. If a transformer

has to be left outdoors, protective measures should be taken to prevent moisture and

foreign debris from entering the transformer. Also, if the transformer is to be stored for a

long period of time, then the transformer should be equipped with a suitable drying agent

such as silica gel. The energization of the space heaters (optional) is recommended to

prevent moisture collection inside the transformer due to condensation, etc. The unit

should be checked periodically for indications of condensation (i.e. Windings, coil support

blocks, core, core clamping system, bus/cable, etc.). Before the transformer is placed into

operation after being stored, the insulation should be checked for condensation by

performing an insulation resistance test (see “Testing”). If condensation is found a drying-

out procedure may be necessary. Space heaters are not adequate for drying.

1.11.3 Installation of new transformer

Installation of 2000KVA Dry type Transformer shall carried out in accordance with IS 10028 Part-

II, Indian Electricity rules and related statutory norms.

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Once the transformer has been located on its permanent site, a thorough final inspection

should be made before any assembly is accomplished and the unit is energized. Before

energizing the unit, it's very important that to alert all personnel installing the transformer that

lethal voltages will be present inside the transformer enclosure as well as at all connection

points. The installation of conductors should be performed only by personnel qualified and

experienced in high-voltage equipment. Personnel should be instructed that should any

service work be required to the unit, the lines that power the transformer must be opened and

appropriate safety locks and tags applied.

Following points shall be checked prior to energizing the Transformer:

i. Make sure all connections to cables or bus bars are properly connected and well

positioned.

ii. Make sure that all connections at the tap change panel are firmly tightened and at the

same position in the three phases.

iii. Make sure the grounding mesh is correctly connected to the bolt provided for this

purpose.

iv. In case of transformers fitted with a thermal protective device, check the connections of

the circuit, making sure that the voltage is in accordance and that the alarm and shut-

off contacts are connected to their corresponding loops.

In Addition to above checks, All Pre-commissioning Test shall be carried out by the Contractor as mentioned above in item no-1.8 and shall be in accordance with IS 2026.

1.11.4 Energizing of Transformer

When energizing the transformer, slowly increase the load while monitoring current, voltage,

load levels, etc. If it is not possible to begin at no-load, full load may be applied with

caution. It is not recommended to load the unit above the maximum continuous load on the

nameplate. If there is any doubt about the load, voltage or current levels, or in any area,

contact the manufacturer immediately

All the procedure specified above for the dismantling of Existing Oil type Transformer-1 and

installation of New dry type Transformer-1, shall be repeated for installation of Transformer-2.

2.0 Codes & Standards

The offered transformers shall conform to IS 2026 & IS 11171 as amended up to date and materials, equipment’s & methods used in the manufacturing, testing of distribution

transformers shall conform to the latest amendments of below mentioned standards:

Indian

Standards

TITLE

IS 2026 Specifications for power transformers

IS 11171 Dry Type Power Transformers

IS 12444 Specification for Copper wire rod

IS 1271 Thermal evaluation and classification of electrical insulation

IS 5 Specification for colors for ready mixed paints

IS 104 Ready mixed paint, brushing zinc chromate, priming

IS 2099 Specification for High Voltage Bushing

IS 649 Testing for steel sheets & strips and magnetic circuits

IS 4257 Dimensions for clamping arrangements for bushings

IS 7421 Specification for Low Voltage Bushings

IS 3347 Dimensions for Porcelain Transformer bushings

IS 9335 Specification for Insulating Kraft Paper

IS 1576 Specification for Insulating Press Board

IS 2362 Determination of water content in oil for porcelain bushing of transformer

IS 6160 Rectangular Electrical conductor for electrical machines

IS 5561 Electrical power connector

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Indian

Standards

TITLE

IS 10028 Selection, Installation & maintenance of transformers

IS 2705 Current Transformers

IS 3639 Fitting & Accessories of Power Transformers

IS 13947 LV switchgear & control gear – Part 1

Supplier shall strictly adhere to Indian Electricity Rules, Indian Electricity Act, CBIP Manual as

well as CEA Regulations 2016.

IEC Standards TITLE

IEC 60071 Co-ordination of Insulation

IEC 60445

Basic & safety principles for man-machine interface, marking and

identification – identification of equipment terminals and conductor

termination

IEC 60529 Degrees of protection provided by enclosures (IP code)

IEC 60551 Determination of Transformer & reactor sound levels

IEC 60606 Application Guide for Power Transformers

IEC 60616 Terminal & Tapping markings for power transformers

British Standards TITLE

BS 2562 Cable Boxes for Transformers & Reactors

In the event of direct conflict between various order documents, the precedence of authority of documents shall be as follows:

a. Guaranteed Technical Particulars (GTP)

b. This Specification

c. Indian Standards / IEC Standards

d. Approved Vendor Drawings

e. Other documents

3.0 Design Basis

The transformers shall be suitable for indoor installation with 3ph, 50 Hz, 11kV system in which

the neutral is effectively earthed and they shall be suitable for service with fluctuations in

supply voltage up to ±12.5%. The transformers shall conform to following specific parameters:

a. Highest System Voltage (HV side) : 12 kV

b. Rated Voltage HV : 11kV c. Highest System Voltage (LV side) : 460 Volts

d. Rated Voltage LV : 433 V

e. No Load Voltage Ratio : 11000/433 Volts

f. Standard kVA rating : 2000 kVA

g. Frequency : 50 Hz ± 3 %

h. Transient Condition : -20% or +10% combined variation of voltage & freq.

i. No. of phases : 3 ph

j. Connection HV : Delta

k. Connection LV : Star (Neutral brought out)

l. Vector Group : Dyn-11

m. Type : Dry Cast resin type

n. Type of cooling : AN as per IS 2026 (Part 2)

o. No Load Current : No Load Current shall not exceed 2% of the Full

Load Current and shall be measured by energizing

the transformer at rated voltage & frequency. p. Audible sound level: Shall not be more than 69db as per NEMA standard

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4.0 SERVICES CONDITION:

a. Location : Indoor at MDL, Mumbai

b. Climatic Condition : Heavily polluted, salt laden, dusty, conducive to rust,

humid with possibility of condensation

c. Max. Altitude above sea level : 1000 meters

d. Max. Ambient air temperature : Highest 45 deg C,

e. Avg. Ambient Temp. : Average 40 deg C

f. Relative Humidity : 95% Max.

g. Rainfall : 2500 mm concentrated in four months

5.0 Other Design Parameters:

5.1 Insulation Levels: (as per IS:206)

5.2 Short Circuit withstand level :

a. 3 secs for 3 ph dead short circuit at secondary

terminal with rated voltage maintained on the

other side b. 3 secs for single ph short circuit at secondary

terminal with rated voltage maintained on the

other side

5.3 Overload Capability : Conforming to IS 6600

5.4 Harmonic Suppression : To be designed for suppression of 3rd, 5th & 7th

harmonic voltages and high freq. disturbances

5.5 Radio Influence Voltage : Maximum 250 microvolt

5.6 Partial Discharges : To be free from partial discharge upto 120% of rated

voltage as the voltage is reduced from150% of rated

voltage i.e. there shall be no significant rise above

background level

5.7 Parallel Operation : Offered transformers shall be designed to operate in

parallel, if need arises

5.8 % Impedance : At 75 deg C, it shall be 5%

5.9 Losses : Maximum Total Losses at rated voltage & freq. at 75

deg. C shall be as per IS 2026 & IS 11171

5.10 Temperature Rise : The permissible temperature-rise shall not exceed the

limits specified in the IS standard

5.11 Ref. Ambient Temp. for Temperature Rise : 40 deg C

5.12 Lightning Impulse withstand Voltage : 75kVpeak for nominal system voltage of 11kV

5.13 Power Freq. withstand Voltage : 28kVrms for nominal system voltage of 11kV & 3 kVrms

for nominal system voltage of 433V

5.14 Minimum Clearances for bushing : Min. clearances of bushing terminals for Transformer

with terminal boxes shall be as per IS 2026

Voltage (kV) Impulse Voltage

(kV peak)

Power Freq.

Voltage (kV)

0.433 -- 3

11 75 28

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5.15 System Fault Level : HV side: 350 MVA & LV side: 35 MVA

5.16 System Earthing : Solidly earthed on HV & LV side

5.17 Tappings : Off circuit taps on HV winding, +5% to -10% in steps of

2.5% for variation of HV

5.18 Tapping Method : Tap changing shall be carried out by means of an

externally operated off circuit rotary tap switch, when

the transformer is in de-energized condition. Switch

position no. 1 shall correspond to the maximum plus

tapping. Each tap change shall result in variation of

2.5% in voltage. Provision shall be made for locking the

tapping switch handle in position. Suitable anodized

plate shall be fixed for tap changing switch to know the

position number of tap.

5.19 Rotary Tap switch operating voltage : 11 kV

5.20 Rotary Tap switch Current Rating : 150 Amp

6.0 Construction & Design:

6.1 Type Double Copper wound, three phase, Dry Cast resin

type with off circuit tap changer

Major Parts

6.2 Enclosure

6.2.1 Type Rectangular shape & non sealed type.

6.2.2 Material of Construction Prime quality mild steel plate without pitting and low carbon content.

6.3 CORE

6.3.1 Material High grade , non-ageing, low loss, high permeability,

grain oriented, cold rolled silicon steel lamination

coated on both sides with hot oil proof insulation,

bolted together to the frames firmly to prevent

vibration or noise. All core clamping bolts shall be effectively insulated.

6.3.2 Core Material Grade Premium Grade M4 or better

6.3.3 Core Design Features a) Magnetic circuit designed to avoid short circuit

paths within core or to the earthed clamping structures.

b) Magnetic circuit shall not produce flux components

at right angles to the plane of lamination to avoid local heating

c) Least possible air gap and rigid clamping to minimize core loss and noise generation

d) Adequately fitted to withstand bolted faults on

secondary terminals without mechanical damage

and damage/ displacement during transportation and positioning.

e) Percentage harmonic potential with the maximum

Nominal System

Voltage (kV) phase to phase

phase to

earth

11 130 mm 80 mm

0.433 25 mm 20 mm

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flux density under any condition limited to avoid capacitor overloading in the system

f) All steel sections used for supporting the core shall

be thoroughly sand blasted after cutting, drilling, welding

g) Provision of lifting lugs for core coil assembly

6.4 WINDING

6.4.1 Material Electrolytic Grade Copper. Double paper covered

copper conductor shall be used for HV and LV

Winding

6.4.2 Maximum Current Density allowed (HV / LV)

Not more than 3.0 Amp per sq mm for copper conductor

6.4.3 Winding Insulating material Class A, non-catalytic & inert

6.4.4 Winding Insulation Uniform

6.4.5 Design features a) Stacks of winding to receive adequate shrinkage

treatment

b) Connections braced to withstand shock during transport, switching, short circuit, or other transients.

c) Minimum out of balance force in the transformer winding at all voltage ratios.

d) Conductor width on edge exceeding six times its thickness

e) Transposed at sufficient intervals.

f) Coil assembly shall be suitably supported between adjacent sections by insulating spacers + barriers

g) Winding leads rigidly supported

h) L.V. Neutral formation shall be at top

6.5 Bushings and Terminations

6.5.1 Type of HV side bushings Indoor , Epoxy Resin cast / Porcelain, 12kV voltage

class conforming to relevant IS

6.5.2 Type of LV side bushings Indoor, Epoxy resin cast / Porcelain, 1.1kV voltage

class conforming to relevant IS

6.5.3 Support insulators inside HV cable

box

Epoxy resin cast, 12kV voltage class

6.5.4 Termination on HV side bushings By bimetallic terminal connectors suitable for XLPE

Cable connection inside cable termination box.

6.5.5 Termination of LV side bushings By bimetallic terminal connectors suitable for

connecting with LT bus duct. Supply & installation of

rated Palm connectors (made of Brass & conforming

to type 1 of IS: 319-1974 or IS: 3488-1966 and tinned

finishing) along with rated flexible links of thin plates of

tinned copper (3 phase & neutral) suitable for LT bus duct connection.

6.5.6 Minimum creepage distance of all

bushings and support insulators

31 mm/kV

6.5.7 Protected creepage distance At least 50 % of total creepage distance

6.5.8 Continuous Current rating Minimum 20 % higher than the current corresponding

to the minimum tap of the transformer

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6.5.9 Rated thermal short time current

a HV Bushing: 25 times rated current for 2 secs.

b LV Line & Neutral Bushing: 25 times rated current for 2 secs.

6.5.10 Atmospheric protection for clamp and fitting of iron and steel

Hot dip galvanizing as per IS 2633

6.6 HV & LV Termination boxes Supply & Installation required

6.6.1 Material & Construction a) Mild Steel min 2.5 mm thick

b) The parts shall be removable for cable / bus duct termination purposes.

c) Suitable nitrile/neoprene gasket of non-deteriorating

rubber braided cork sheet or similar type of material shall be provided at all joints to ensure tightness.

d) Each detachable part shall be earthed by routing a braided copper wire.

e) The end covers on the termination boxes shall be

provided with suitable fixed handles. The overall

dimensions shall not exceed the transformer dimensions specified by the firm.

f) The termination boxes shall be provided for Cable / Bus-duct termination.

g) Phase to phase clearance inside HV & LV box shall be min. 130mm & 25 mm respectively.

h) Phase to earth clearance inside HV & LV box shall be min. 80mm & 20 mm respectively.

6.6.2 HV Cable entry At bottom through detachable gland plate with cable clamps of non-magnetic material

6.6.3 XLPE Cable for HV supply

(Approx. Total Length: 62 meters, considering for both transformers)

Supply, digging, laying of XLPE Cables & end

terminations at both ends (on HT Panel & Transformer

HV side) also in scope of work. Firm shall use Raychem

make termination kit. Require ISI marked XLPE

insulated, 3Cx300sqmm stranded compact circular,

aluminum conductor, GI strip armoured, power cable

of 12kV Voltage class conforming to IS 7098 Pt. 2, Total

Length: As per site requirement for each of the transformer.

6.6.4 Connection of Bus Duct on LV side of both transformers

Connection of both transformers to the existing LT bus

ducts. Supply, installation & testing of additional bus

duct sections of same make & model of existing one, complete with all accessories & connect to both

transformers & existing bus ducts to meet the statutory

space requirement around each of the offered HT

transformers is in the suppliers’ scope.

6.6.5 Bus duct specifications a) Bus Duct sections of Make Schneider Electric, Type:

Non phase segregated sandwiched type LT bus

duct, System: 3P4W with 50% internal earth, Rated continuous current: 2500Amp, Rated 1 sec S.C.

withstand 50kA, IP65, Busbars: High conductivity

electrolytic grade copper, Enclosure material:

Galvanized Steel, Provision for earthing on both side, paint shade: RAL 7032.

b) Length: As per site requirement to meet the statutory

space requirement around each of the offered HT

transformers, taking into account the dimensions of

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the offered transformer & site restrictions.

6.6.6 Bus Duct Entry Box for LV side a) Supply & Installation required for Bus Duct Entry Box made of Mild Steel min 2.5 mm thick.

b) Bus Duct entry shall be from Top side plate of Bus Duct Entry box.

c) It shall be installed on LV Terminal Box & shall be

suitable for detachment from LV Terminal Box.

d) Suitable gasket of non-deteriorating rubber braided

cork sheet or similar type of material shall be provided at all joints to ensure tightness.

6.6.7 Detachable Gland Plate material

for HV terminal box & LV bus duct

entry box

MS

6.6.8 Gland plate thickness for HV & LV

Bus duct terminal box

3mm

6.6.9 Cable gland for HV cable Nickel plated brass double compression weatherproof

cable gland and suitable for cable size as per 6.9.3

6.6.10 Cable lug for HV cable Long barrel heavy duty Copper Lug with Knurling on

inside surface and suitable for for cable size as per 6.9.3

6.6.11 Essential parts a. Doors shall be provided to access the Core coil assembly and removable cover for Termination box.

b. Tinned Copper Busbars of adequate size for Purchaser’s cable / busduct termination with busbar supports

c. Earthing boss for the termination box

c) Earthing link for the gasketted joints at two point for each joint

Earthing provision for cable Armour/ Screen

d) Danger / caution plate metallic fixed by rivet

6.7 Hardware

6.7.1 External Stainless Steel

6.7.2 Internal Cadmium plated except special hardware for frame

parts and core assembly as per manufacturer’s design

6.8 Cable routing on Transformer Control cables for accessories on transformer tank shall

be routed through perforated GI trays

6.8.1 Control cable specification PVC insulated, extruded PVC inner sheathed,

armoured, extruded PVC outer sheathed 1100 V grade

control cable as per latest edition of IS 1554 part 1

minimum 2.5 sq mm for signals with multi strand copper conductor

6.8.2 Specification of wires to be used

inside marshalling box

PVC insulated multi-strand flexible copper wires of

minimum 2.5 sq mm size, 1100 V grade as per latest edition of relevant IS

6.9 Terminal Blocks to be used by the

vendor

Nylon 66 material, minimum 4 sq mm, screw type for

control wiring and potential circuit

6.10 Cable glands to be used by the

vendor

Nickel plated brass double compression weatherproof

cable gland

6.10.1 Lugs for power cables Long barrel heavy duty Aluminium lug with knurling on inside surface

6.10.2 Lugs for Control Cables Tinned copper pre-insulated Pin, Ring, Fork type as

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applicable

6.11 Painting of transformer,

marshalling box for CT, cable boxes etc.

6.11.1 Surface preparation By 7 tank pretreatment process or shot blasting method

6.11.2 Finish on inner surface of the

HV/LV terminal box & bus duct entry box

White Polyurethane paint anti condensation type two

coats, minimum dry film thickness 120 microns

6.11.3 Finish on inner & outer surface of

the transformer enclose, HV/LV terminal box & bus duct entry box

Battle ship Grey shade 632 Polyurethane paint two

coats , minimum dry film thickness 120 microns

6.11.4 Frame parts Battle ship grey shade 632 IS 5, 120 micron minimum dry

film thickness.

7.0 Fittings & Accessories for each of Transformer:

7.1 Rating and Diagram Plate Required

7.1.1 Material Anodized aluminum 16SWG

7.1.2 Background SATIN SILVER

7.1.3 Letters, diagram & border Black

7.1.4 Process Etching

7.1.5 Rating and Diagram Plate details Following details shall be provided on rating and

diagram plate as a minimum

a) Type/kind of transformer with winding material

b) Month and year of manufacture

c) Rated frequency in Hz

d) Rated voltages in kV

e) Number of phases

f) Rated power in kVA

g) Type of cooling (AN)

h) Rated currents in A

i) Vector group connection symbol

j) Power frequency withstand voltage in kV

k) Impedance voltage at rated current and frequency

in percentage at principal, minimum and maximum

tap

l) Load loss at rated current

m) No-load loss at rated voltage and frequency

n) Continuous ambient temperature at which ratings

apply in deg C

o) Winding temperature rise at rated load in deg C

p) Winding connection diagram with taps and table of

tapping voltage, current and power

q) Transport weight of transformer

r) Weight of core and windings

s) Total weight

t) Name of the purchaser

u) PO no and date

v) Guarantee period

w) Winding insulation level

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7.2 Terminal marking Plate for

Bushing, anodized aluminium

black lettering on satin silver

background both inside cable

boxes near termination and on

cable box cover (all fixed by

rivet)

Required

7.3 Company Monogram Plate

fixed by rivet

Required

7.4 Lifting Lugs to lift complete

transformer

Required (minimum 4 nos. to body)

7.5 Lifting lugs for top cover Required (minimum 2 nos.)

7.6 Lashing Lugs Required

7.7 Jacking Pads with Haulage

hole to raise or lower complete

transformer

Required (4 nos.)

7.8 Detachable Bidirectional flat

roller Assembly

Required

7.8.1 Essential provision Roller dia 150 mm min., roller to be fixed in such a

way so that the lowermost part of the skid is

above ground by at least 100 mm when the transformer

is installed on roller

7.9 Earthing pad on enclosure for

transformer earthing complete

with non ferrous nut ., bolt,

washers, spring washers etc. with

metallic identification plate fixed

by rivet

Required

7.10 Earthing bridge by copper strip

jumpers on all gasketted joints at

at least two points for electrical

continuity

Required

7.11 Skid base welded type with

haulage hole

Required

7.12 Core , Frame to enclosure

Earthing

Required

7.13 Danger plate made of Anodized

aluminum with white letters on red

background on Transformer,

cable boxes (all fixed by rivet)

Required

7.14 Caution plate for Off Circuit

tap changer fixed by rivet.

Required

7.15 Winding Temperature Indicator (1

no.)

Required

7.16 WTI Scanner Box (IP 55) for

winding temperature indicator

Required

7.17 Base Channel (2 nos.) Required

7.18 Pulling Lugs 4 nos.

7.19 Make 4 nos. earth pits having

Copper earthing plate & 4 no’s of

GI earth pits & connect them in a grid with GI Strips

Total 8 nos. new earth pits required.

Connect installed transformers’ neutral & body to earth

pits using GI/Cu Strips.

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8.0 Submittals:

8.1 Submittals required with Technical

Bid

a) Duly Filled up Guaranteed technical particulars

b) Descriptive literature giving full technical details of

equipment offered

c) Outline dimension drawing for each major

component, general arrangement drawing

showing component layout and general

schematic diagrams

d) Type test certificates and sample routine test

reports

e) Detailed reference list of customers already using

equipment offered during the last 5 years with

particular emphasis on units of similar design and

rating f) Details of manufacturer's quality assurance

program

g) Recommended spare parts and consumable

items for five years of operation with prices and

spare parts catalogue with price list for future

requirements

8.2 Submittals required at the final

hold

point prior to dispatch

a) Inspection and test reports carried

out in manufacturer’s works

b) Test certificates of all bought out items

c) Operation and maintenance instructions

manual as well as trouble shooting charts/

manual

d) Drawings of major components like Bushing

e) BOM

8.3 Drawing and document sizes Standard size paper A1, A2, A3, A4

9.0 Submission of drawing to mdl/consultant approval prior to manufacturing:

Prior to manufacture, a set of following drawings with all dimensions shall be submitted for MDL

approval within 1 month after order placement.

1. Rating & Marking Plate drawing

2. General Arrangement & Layout drawing for transformers’ installation at actual site 3. HV bushing assembly

4. LV bushing assembly

5. Terminal arrangements

6. HV & LV Terminal Box

7. Bus Duct Entry Box

8. Marshalling Box

9. Wiring schematic

10. GA drawing of offered Transformers

11. Busduct Layout (GA drawings) for termination at LV side & joining details with existing bus

duct for both transformers

12. Busduct sections’ dimensional details & technical ratings & details sheet

13. Busduct supporting arrangement (GA drawing) for both transformers

14. List of makes of all fittings and accessories

10.0 Inspection & testing during manufacturing of both transformers:

The supplier shall submit all the stage inspection Reports as per Quality Assurance Plan (QAP)

and Factory Acceptance Test Reports to MDL prior to the Pre-dispatch inspection & Testing

call.

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11.0 Pre-dispatch inspection & testing of both transformers:

a) Below mentioned all Routine Tests & Type Tests shall be conducted on both the

transformers at Manufacturer’s Works in the presence of MDL’s representatives and/ OR

Consultant’s representatives. Some of the Routine tests & Type tests specifically

mentioned below in the scope shall be conducted at Manufacturer’s Works by

ERDA/CPRI personnel using ERDA / CPRI’s own equipments in the presence of MDL’s

representatives and / OR Consultant’s representatives. Original Test Certificates for the

tests carried out by ERDA/CPRI shall be issued by ERDA / CPRI and Original Test

Certificates for tests carried out by the Manufacturer shall be issued by the

manufacturer.

b) Supplier shall submit both the certificate sets to MDL and Electrical Consultant. Based on

the Test Reports, Dispatch Clearance shall be given from MDL office at Mumbai.

Inspection & Testing charges inclusive of ERDA / CPRI’s services, as well as

Manufacturer’s services shall be included in the cost of offered transformers at the time

of bidding.

c) Supplier shall issue pre-dispatch inspection & testing call 25 days in advance prior to the

inspection & testing schedule, with confirmation that both the transformers are complete

in all respect so as to be offered for the pre-dispatch inspection and testing. Supplier shall also forward the inspection & test schedule at the time of giving inspection & testing call.

All of these tests shall be conducted at a one go.

11.1 Following Routine Tests to be carried

out at Manufacturer’s Works by

manufacturer using their own

equipments in the presence of

MDL’s representatives and/ OR

Consultant’s representatives.

Measuring Instruments used for

testing shall have valid calibration certificates.

a) Visual and dimension check for completely

assembled transformer

b) Measurements of voltage ratio & check of phase displacement

c) Measurements of winding resistance at principal tap and two extreme taps.

d) Measurements of insulation resistance: It shall be carried out at 5kV for HV and 1 kV for LV.

e) Separate sources voltage withstand test

f) Induced voltage withstand test

g) Impedance measurement of principal tap (HV and LV) of the transformer.

h) Magnetic balance test

i) Power frequency voltage withstand test on all auxiliary circuits

11.2 Following Routine Tests to be carried

out at Manufacturer’s Works by

ERDA/CPRI personnel using ERDA /

CPRI’s own equipments in the

presence of MDL’s representatives

and/ OR Consultant’s representatives.

a) Measurement of iron losses and exciting current at

rated frequency and 90%, 100% and 110% rated voltage

b) Load losses measurement.

c) Vector Group and polarity test

d) Certification of all test results by ERDA / CPRI

11.3 Type Tests to be carried out at

Manufacturer’s Works by

ERDA/CPRI personnel using ERDA /

CPRI’s own equipments in the

presence of MDL’s representatives

and/ OR Consultant’s representatives.

a) Temperature Rise Test

11.4 Special Tests to be carried out at a) Measure of zero seq. impedance (Cl. 16.10 IS 2026

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Manufacturer’s Works by

manufacturer using their own

equipments in the presence of

MDL’s representatives and/ OR Consultant’s representatives.

Part I)

b) Measurement of acoustic noise level (Cl. 16.12 of IS 2026 Part I)

c) Measurement of harmonic level on no load current.

11.5 OEM shall submit TEST Certificates of

the following raw materials as per

relevant IS amended up to date, to

MDL Representatives and

Consultant’s representatives at the

time of routine testing of fully assembled transformer.

a) Copper Conductor

b) Core

c) Porcelain Bushings

d) Electrical grade insulating Kraft Paper

12.0 Packaging

1 Packaging protection Against corrosion, dampness, heavy rains, breakage and vibration

2 Packaging for accessories

and spares

Robust wooden non-returnable packing case with all the

above protection

13.0 Annexures to be submitted along with technical bid

The bidder shall fill in & submit the following 2 nos. Annexures which shall be part of the

technical bid of the offer. If the duly filled in Annexures are not submitted with the technical

bid of the offer, then the offer shall be rejected.

Annexure 1: Confirmations by Seller for scope of Supply & Work for Both Transformers and

Technical Pre-Qualification Criteria.

Annexure 2: Confirmations by Seller for Guaranteed Technical Particulars.

Annexure 3: Data sheets of transformers.

14.0 Deviations:

Deviations from this Specification shall be clearly mentioned in the technical bid by reference

to the Specification clause no./GTP/Drawing and a description of the alternative offer. In

absence of such a statement, requirements of the Specification shall be met without

exception.

15.0 Guarantee:

Transformers supplied against this specification shall be guaranteed for the period of 12

months from the date of commissioning or for period of 18 months from the date of supply.

16.0 Documents to be supplied at the time of delivery:

1. Set of all the approved documents mentioned in the clause no. 9 of this specs.

2. Spare parts list/Bill of material in excel sheet format

3. Calibration certificates for all the gauges fitted on the transformer

4. Guarantee Certificates

5. Instruction & Operation Manual

6. Softcopies of documents listed above from 16.1 to 16.5 on 2 nos. DVDs

17.0 QAP shall include following,

Raw Material:

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1 RAW MATERIAL

Sr.

No.

Material Component

Operations

Characteristic/ Inspection /

Testing

Bidder input

1 Conductor : P.C / enamel covered (Round & Strip

Bare & Paper Covering size

2 Insulating Papers : Nomex Thickness and size

3 Fiber glass sheets Thickness and size

4 Fiber glass cloth No physical damage

5 Varnish Viscosity & type

6 CRGO Lamination Thickness, Rust free, Grade

7 gaskets Thickness, Compressibility, &

Size

8 M.S.Sheets & Channel for enclosure &frames

Thickness , Size & Rust free

9 Brass stud for tap changing Dimensions

10 Bushings & epoxy insulators HV test / Crrpage

11 Neutral C. T. Pri/Sec ratio

12 Fiberglass tube, HT Sleeves,

Tape, blocks, spacers

Dimensions & Visual

13 Digital WTI (optional ) Alarm & Trip Checking

14

Enclosure ( for core-coil assembly

Dimensions & welding

Quality, door alignment &

Rollers.

In process inspection:

2 INPROCESS INSPECTION

Sr.

No.

Material

Component

Operations

Characteristic/ Inspection / Testing

Bidder input

1

Core Building

( steplap, mitred

construction)

i) Window Height & Width

ii)Number of sreps

iii) Diameter & diagonals

iv) Frame insulation

v) Araldite application On core limbs

vi) Anti Rust Protection

2 Winding

i) Bare Conductor Size & Nomex

covering size.

ii) ID, OD & Axial heights of HV & LV

iii) Continuity test

iv) Lead Positions for HV & LV winding

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3

EPOXY casting of

individual winding

in casting plant

1) pouring the mixture under vacuum.

2) POSITION of tapping studs

4

Curing of

moulded winding

in oven

EPOXY material should be fully hard &

without any cracks

5 Assembly

i) Size of common blks. At top & bottom

end.

ii) Winding height

iii) HV & LV Clamping

iv) Cooling ducts

v) 1St Ratio Test Before casting

vi) 2nd Ratio test After casting

vii) Core / Frame & yoke stude insul.

Checking

viii) Core to frame earthing

ix) HV connections for delta / star

formation.

x) Brazing of current carrying joints

6

Tanking

i) Clearances between phases

ii) Clamping & tightness of fasteners

before tanking

iii) Straightness of top yoke lamination

iv) Ready for top cover & tightness of

connections & contact surface tinned

v) Air intel and outlet openings (

Ventilation )

vii) Terminal arrangement ( Cable box

/ Bus duct )

Final Testing & Dispatch:

3 FINAL TESTING & DISPATCH

Sr.

No.

Material

Component Operations

Characteristic/ Inspection / Testing Bidder/Consultant/clients input

1 Insulation

Resistance

I.R. Values in M. ohms @ ambient

2 Final Ratio Test Voltage Ratio at all tap positions

3 Winding resistance Resistance in Ohms / milliohm

4 Vector Group check

Vector Relationship

5 Separate Source

voltage withstand

Withstand test

6 iInduced over

voltage withstand

Withstand Test

7 No Load loss test Losses & % Excitation

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8 Load loss & % Z

measurement

Losses & % Impedance

9 Temp. rise Test

(Type test)

wdg. Temp. rise

10 Acoustic Noise level test (Type test)

Sound level checking

11 Packing of Accessories

Visual check to avoid damage during transport

12 Finishing i) Terminal marking & Rating plate ii)

Paint Shade

13 Dispatch Supporting at Lorry base & lashing by

rope

18.0 Guaranteed technical particulars for distribution transformers

The bidder should fill up Technical particulars of Distribution Transformer in the following format)

The Bidder shall give his alternate offer for Oil cooled Transformer.

___________________________________________ (Bidder’s Name)

SR. NO. PARTICULARS Bidders input

1.0 General

1.1 Make

1.2 Type

1.3 Reference Standard

2.0 Rating

2.1 Rated output 2000 KVA

2.2 Type of cooling Air Cooled

2.3 Rated Voltage (kV)

H.V.

L.V.

11 KV

0.433 KV

2.4 Rated Current (Amps)

a) H.V.

b) L.V.

2.5 Guaranteed No Load current @ 100% rated voltage A H.V.

B L.V.

2.6 Guaranteed No Load current @ 110% rated voltage

H.V.

L.V.

2.7 No. of phases

2.8 No. of windings per phase

2.9 Rated Frequency ( Hz )

2.10 Vector Group reference

3.0 Temperature

3.1 Reference ambient temperature (deg C )

3.2 a)Temperature rise over reference Ambient

b) Winding by resistance ( deg C )

3.3 Maximum continuous overloading capacity of the

transformer without exceeding the specified winding

temperature

4.0 Tappings

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4.1 Type

4.2 Capacity

4.3 Range-Steps x % variation +7.5% to -7.5% in steps of

2.5%

4.4. Taps provided on H.V. windings

4.5 Details of Tappings

Tap Position HV Volts / LV Volts

1

2

3

4

5

4.6 Off load Tap Links

a) Operating Voltage ( kV )

b) Rated Current ( Amp )

c) Type

d) Reference Standard

e) Number of Poles

f) Defined features provided

(Please attach technical catalog giving details and

drawing)

Yes/No

5.0 Impedance at principal tap rated current and

frequency (%)

5.1 Impedance

5.2 Reactance

5.3 Resistance

5.4. Zero Sequence impedance

a) H.V.

b) L.V.

5.5 Resistance of the winding @ 75 Deg C

a) H.V.

b) L.V.

6.0 Guaranteed Losses at principal tap full load and 75

Deg C without any positive tolerance

6.1 No load losses (kW)

6.2 Load Losses (kW)

6.3 Total Losses (kW)

6.4 No Load loss at maximum permissible voltage and

frequency (approx.) kW.

7.0 Efficiency

7.1. Efficiency at 75 Deg C and unity power factor (%)

a) at 110% load

b) at 100% load

c) at 80% load

d) at 60% load

e) at 40% load

f) at 20% load

7.2 Efficiency @ 75deg C and 0.8 power factor lag ( % )

a) at 110% load

b) at 100% load

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c) at 80% load

d) at 60% load

e) at 40% load

f) at 20% load

Maximum efficiency (%)

Load and power factor at which it occurs

8.0 Regulation

Regulation at full load @75 Deg C

a) at Unity power factor

b) at 0.8 Power factor lagging

Regulation at 110% load @ 75 Deg C

a) at Unity power factor

b) at 0.8 Power factor lagging

9.0 No. load current (Amps)

At 100% voltage

a) H.V.

b) L.V

At 110 % voltage

a) H.V.

b) L.V

10.0 Maximum flux density (Lines/cm2 )

At 100% rated voltage

At 110% rated voltage

11.0 Maximum current density Amps/ cm2.

H.V. Winding

L.V. Winding

Withstand time and current as multiple of full load

current without injury for (Amps x Sec.)

Three phase dead short circuit at terminal with rated

voltage maintained on the other side.

Single phase short circuit at terminal with rated

voltage maintained on other side

12.0 Cooling System (if applicable)

Type of cooling

No. of cooling exhaust fans

Capacity of cooling exhaust fan

13.0 Core

Type/Core/or shell

Core Material

Thickness of lamination (mm)

Insulation of lamination (mm)

Equivalent cross section area ( mm2 )

14.0 Coils

14.1 Type of coils

a) H.V.

B) L.V

14.2 Conductor material

Gauge/area of cross section of conductor

a) H.V.

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b) L.V

14.3 Insulating material ( class H/180 Deg C or above )

a) H.V. Turn

b) L.V. Turn

c) L.V. Core

d) H.V – L.V.

14.4 Insulating material thickness (mm)

a) H.V. Turn

b) L.V. Turn

c) L.V. Core

d) H.V – L.V.

15.0 Minimum design clearance (mm)

H.V. to earth in air

L.V. to earth in air

Between H.V. & L.V. in air

Top Winding and Yoke

Bottom winding and yoke

16.0 Transformer impulse level (kV)

H.V. Winding

L.V. Winding

17.0 Bushing

Make

Type

Reference Standard

Voltage Class (kV)

Creepage distance factor (mm/kV)

Weight ( Kg )

Free space required for bushing removal (mm)

18.0 Terminal connections

H.V

L.V

L.V. Neutral

L.V. side to have Busduct provision

19.0 Accessories

Each Transformer furnished with fittings and

accessories as per Clause No.5.00.00 (Please attach

separate sheet giving details)

20.0 Drawings.

The Bidder shall submit the following drawings along

with offer:-

a. The overall schematic diagram with ratings

b. The physical arrangement lay out showing plan,

elevation and section for all equipments of CSS.

c. The foundation drawings showing civil work

requirement to install CSS.

21.0 Overall dimensions

Length (mm)

Breadth (mm)

Height (mm)

22.0 Weight Data Kg)

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Core and frame (Kg)

Core windings etc. (Kg)

Total Weight (Kg)

23.0 Shipping Data

Weight of heaviest package (Kg)

Dimensions of the largest package (L x B x H) (mm)

24.0 Tests

Routine tests as per IS:11171/1985

Core bolt withstand voltage for 1 minute

Type Test quoted:

Temperature rise test at ANAN rating

Impulse Test (kV peak)

(Add Sheets if necessary)

Partial Discharge Level:

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TECHNICAL SPECIFICATIONS FOR POINT WIRING

1.0 Scope of Work

This section covers, definition of point wiring, system of wiring and supply, installation,

connection, testing and commissioning of point wiring for light points, convenience socket

outlet points, power socket outlet points etc. including fixing of light fixtures.

2.0 Code & Standards

The following standards and rules shall be applicable:

Sr.

No.

Item Relevant IS Relevant IEC

1 Code of practice for electrical wiring

installation (System voltage not exceeding

650 V)

IS: 732

2 Code of practice for fire safety of buildings

(General) Electrical installation.

IS: 1646

3 Rigid steel conduits for electrical wiring. IS: 9537 (Part - 2)

4 Fittings for rigid steel conduits for electrical

wiring.

IS: 2667

5 Flexible steel conduits for Electrical wiring. IS: 3480

6 Accessories for rigid steel conduit for

electrical wiring.

IS: 3837

7 PVC insulated cables. IS: 694

8 Rigid non-metallic conduits for electrical

wiring.

IS: 9537 (Part - 3)

9 Flexible (Pliable) non-metallic conduits for

electrical installation.

IS: 6946

10 3 pin plugs and sockets. IS: 1293

11 Specifications of conduits for electrical

installation.

IS: 8130

12 Switches for domestic purpose. IS: 3854

13 Fittings for rigid non-metallic conduits. IS: 3419

14 Guide for electrical layout in residential

buildings Indian electricity act and rules.

IS: 4648

3.0 System of Wiring

Unless otherwise mentioned on the drawings, the system of point wiring shall be as follows

The system of wiring shall consist of single core, FRLS insulated, 650/1100 volt grade, copper

conductor wires/cables laid through exposed (surface mounted) PVC conduits as directed &

wherever required, conduits shall be concealed in walls and slabs

4.0 General

Prior to laying of conduits, the contractor shall submit for approval, the shop drawing for

conduit layout indicating the route of the conduits, number and size of the conduits, location

of junction/inspection/pull/outlet boxes, size and location of switch boxes, number and size of

wires pulled through each conduit and all other necessary relevant details. Only after the

drawings are approved, the contractor shall proceed with the work of laying of conduits.

5.0 Material

5.1 PVC Conduit

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All non-metallic PVC conduits shall conform to IS: 9537 (Part - 3). The conduit shall be planed

and of type as specified in IS: 9537 and shall be used with the corresponding accessories

(Refer IS: 3419 specification for fittings for rigid non-metallic conduits). PVC conduits shall be

rigid unplasticised, heavy gauge having 2.0 mm. wall thickness upto 20 mm. diameter conduit

and 2.5 mm. wall thickness for all sizes above 20 mm. diameter

5.2 Cables

1. The cables shall conform to IS: 697. For all internal wiring FRLS insulated cables of 650/1100

volts grade, single core shall be used.

2. The conductors shall be plain annealed copper conductors complying with IS: 1554.

3. The conductors shall be circular copper conductor.

4. The insulation shall be FRLS compound complying with the requirements of IS: 697. It shall be applied by an extrusion process and shall form a compact homogenous body.

5. The thickness of FRLS insulation shall be as set out in the relevant standards

6.0 Switches

1. Switches shall conform to IS: 3854, IS: 1293 and IS: 4615. The switches shall be single pole,

single or two way as shown on the drawings or as specified. They shall be of moulded type

rated for 250 volt, and of full 5/15 A capacity. They shall be provided with insulated dollies

and covers

2. The switches shall be rocker operated with a quiet operating mechanism with bounce free

snap action mechanism enclosed in an arc resistant chamber.

3. The switches shall have pure silver and silver cadmium contacts.

4. The switches shall be flush modular type.

5. The make of the switches shall be as indicated in the drawings or BOQ or make of material

or as suggested and approved by the client.

7.0 Socket

1. The sockets shall conform to IS: 1293. Each socket shall be provided with control switch of

appropriate rating. The sockets shall be moulded type, rated for 250 volts, and either of full

5 A or 15 A capacity, as mentioned on the drawings.

2. Sockets shall be of three pin type, the third in being connected to earth continuity

conductor.

3. The socket shall be flush modular type.

4. The finishing and make of all the sockets shall be same as light switch.

5. The socket shall have fully sprung contacts and solid brass shrouded.

6. Terminals to ensure positive electrical connections.

7. The sockets shall be provided with automatic shutters, which open only when earth pin of

the plug inserts in the socket.

8. The socket shall be provided with three pin plug top suitable to the socket and of the same

make as socket.

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8.0 Inspection and testing

8.1 Insulation Resistance Test

The insulation resistance shall be measured by applying 500 volt megger with all fuses in

places, circuit breaker and all switches closed.

The insulation resistance in megohms of an installation, measured shall not be less than 50

megohms divided by the number of points on the circuit.

The insulation resistance shall be measured between

1. EARTH TO PHASE

2. EARTH TO NEUTRAL

3. PHASE TO NEURAL

4. PHASE TO PHASE

8.2 Earth Continuity Path

The earth continuity conductors shall be tested for electrical continuity and the electrical

resistance of the same along with the earthing lead but excluding any added resistance or earth leakage circuit-breaker, measured from the connection, with the earth electrode to any

point in the earth continuity conductor in the completed installation and shall not exceed one

ohm.

9.0 Method of measurement

All the items will be measured as mentioned in Bill of quantity.

10.0 Transport, delivery and storage

The wire shall be supplied in the actual length as per detailed purchase order

The wire shall be dispatched at client’s stores or at site as per detailed instructions given by

client at later stage.

The wire shall be loaded from the main vendor’s store and properly stacked as per instruction of client’s local representative. All such labour and transportation charges shall be clearly

mentioned in the offer.

11.0 Guarantee and warranty

The quotes values of parameters shall be within given tolerance for given period of service

life.

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TECHNICAL SPECIFICATIONS FOR SUPPLY OF LIGHT FIXTURE AND EXHAUST FAN

1.0 Scope of Work

The scope of work shall cover the supply, installation and testing of various types of LED light

fixtures are used in the project.



IS 3646 (1960) Code of practice for interior illuminator.

IS 1913(1969) General and Safety requirements for electric lighting fittings.

Indian Electricity Act and Rules issued here under.

3.0 Technical requirements

3.1 General requirements

All fixtures shall be complete with accessories and fixings necessary for installation whether so

detailed under fixture description or not.

LED Surface type Industrial type luminaire are proposed. Fixture shall be corrosion resistant,

impact proof, surface mounting luminaire with PC housing & opal finish cover suitable for dusty

location with LEDs as light source. Housing shall be made up of corrosion resistant unbreakable

polycarbonate body. Cover shall be of High quality polycarbonate diffuser in opal finish for

glare free uniform light distribution, fixed to the housing with SS snap fit clamps. Lamp shall be High efficiency long life LED chip with Ra>70, lumen efficacy>125 lm/W & view angle 120°.

Optics Reflector made of LEF sheet which is pasted on Al. sheet (heat sink) to enhance the

lumen output of the fixture.

Electronic driver shall be powered by an in-built electronic driver (SMPS based constant

current supply) with THD. Mounting shall be on ceiling/ wall through 2 nos. slots using SS clamps

& screws provided with fixture.

Vendor shall be responsible for measuring the level of illumination after installation.

Lighting fixtures shall be designed for minimum glare and for continuous operation under

specified atmospheric condition.

4.0 LED Lamps:

LED lamp is a light-emitting diode (LED) product which is assembled into a lamp (or light bulb)

for use in lighting fixtures. LED lamps have a lifespan and electrical efficiency which are several

times longer than incandescent lamps, and significantly more efficient than most fluorescent

lamps.LEDs come to full brightness without need for a warm-up time; the life of fluorescent

lighting is also reduced by frequent switching on and off.

LEDs are “directional” light sources, which means they emit light in a specific direction, unlike

incandescent and compact fluorescent bulbs, which emit light and heat in all directions.

The LED bulbs require much less wattage than the CFL or Incandescent light bulbs.

5.0 Luminaires:-

LED Surface type Industrial type luminaire are proposed. Fixture shall be corrosion resistant,

impact proof, surface mounting luminaire with PC housing & opal finish cover suitable for dusty

location with LEDs as light source.

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6.0 LED Industrial type batten light tech specs:-

Sytem power : 20 WATT LED SURFACE MOUNTED LUMINAIRE

LED Type : High Brightness Power LED

Color Temperature : 5000 - 6000K

CRI : >95

Lens : 95 Deg.

7.0 Drawings & Information

As per of the proposal the bidder furnish relevant descriptive and illustrative literature on lighting

fixtures and accessories and following drawings/ data for the respective lighting fixtures:-

1. Dimensional Drawings.

2. Mounting details cable entry facilities and weights.


Supply of the fixture including transport to site, loading and unloading etc. as specified will be

treated as one unit for measurement and payment.

9.0 Guarantee and Warranty

The Bidder shall stand guarantee for the performance of entire fixtures and components for

twelve (12) months from the date of commissioning or eighteen (18) months from the date of

dispatch, whichever is earlier, as agreed up on and as reproduced in the purchase order

within the tolerance specified or as permitted by the relevant standards for the equipment in his scope of supply. The Purchaser also reserves the right to use the rejected equipment or part

thereof until the new equipment meeting the guaranteed performance is supplied by the

Bidder.

10.0 PROPELLER EXHAUST FAN

The Propeller fan shall be direct-driven, three or four blade type, mounted on a steel mounting

plate with orifice ring. Mounting Plate shall be of steel construction, square with streamlined

venturi inlet coated with baked enamel paint. Mounting plate shall be of standard size,

constructed of 12 to 16 gauge sheet steel depending upon the fan size. Orifice ring shall be

correctly formed by spinning or stamping to provide easy passage of air without turbulence and to direct the air stream. Fan blades and hub assembly shall be statically and dynamically

balanced at the manufacturer’s works. Motor shall be standard permanent split capacitor or

shaded pole for small sizes, totally enclosed with pre-lubricated sleeve or ball bearings,

designed for quiet operation with a maximum speed of 1000 rpm for fans 60 cm dia or larger

and 1440 rpm for fans 45 cm dia and smaller. Motors for larger fans shall be suitable for 415±6%

volts, 50 cycles 3 phase power supply, and for smaller fans shall be suitable for 220 ± 6% volts,

50 cycles single phase power supply. Motors shall be suitable for either horizontal or vertical

service. Wire guard on inlet side and bird screen at the outlet, Fixed or gravity louvers built into

a steel frame at the outlet., Regulator for controlling fan speed for single phase fan motor,

Single phase preventors for 3 phase fans shall be included in fan cost.

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TECHNICAL SPECIFICATIONS FOR SUPPLY OF EARTHING SYSTEM

1.0 Scope of Work

Design, assembling, testing, painting, supply, delivery at site with all related accessories as per

the specifications as specified below. Compliance with the provisions of this specification shall

not relieve the Bidder of the responsibility of furnishing apparatus and accessories of proper

design, electrically and mechanically suited to meet the operating requirements under the

specified service conditions and be suitable for the purpose of which they are intended.


The design, material, assembling, inspection and testing shall comply with all currently

applicable statutes, regulations and safety codes in the locality where the system will be

installed. The equipment shall also conform to the latest applicable standards and codes of

practice as mentioned below:

Sr. Item Relevant IS / IEC

1 Code of Practice for Earthing IS 3043

2 Insulation Co-ordination Application Guide IS 3716

3 Code of Practice for Protection of Buildings and Allied Structures against Lightning

IS 2309

4 Indian Electricity Rules, 1956

5 Indian Electricity Act, 1910

6 National Electrical Code

7 Low Voltage Electrical Installations-Part 5-54: Selection & Erection of

Electrical equipment- Earthing arrangement & protective conductors.

IEC 60364

8 Protection Against Lightning –Part 3: Protection of structures & life Hazards

IEC 62305

3.0 Installation of system

The plate/pipe electrode, as far as practicable, shall be buried below permanent moisture

level but in no case less than 3 M below finished ground level.

The plate/pipe electrode shall be kept clear of the building foundation and in no case, it shall

be nearer by less than 2 M from outer face of the respective building wall / column.

Construction of the earthling station shall in general be as shown in the drawing and shall

conform to the requirement on earth electrodes mentioned in the latest edition of Indian

Standard IS: 3043, Code of Practice for Earthling Installation.

The earth conductors ( Strips / Wires, Hot dip G.I. / copper ) inside the building shall properly be

clamped / supported on the wall with Galvanized Iron clamps and Hot Dip GI screws / bolts.

The conductors outside the building shall be laid at least 600 mm. below the finished ground

level.

The earth conductors shall either terminate on earthing socket provided on the equipment or

shall be fastened to the foundation bolt and / or on frames of the equipment. The earthing

connection to equipment body shall be done after removing paint and other oily substances

from the body and then properly be finished

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Over lapping of earth conductors during straight through in joints, where required, shall be of

minimum 75mm. long and bitumen coated.

The earth conductors shall be in one length between the earthing grid and the equipment to

be earthed

Minimum distance of 2 mtr shall be maintained between other electric conductor, earthing

conductor and the conductor laid for the lightning protection system. Earthing and lightning

protection system conductors shall be bonded to each other to prevent side flashover in case

of non-availability of adequate clearance.

The earthing met conductors, risers, earthing cables, etc. passing through walls shall be

covered with galvanized iron sleeves for the passage through wall. Water stop sleeves shall

also be provided wherever the earthing conductor enters the building from outside.

4.0 Plate Electrode Earthing:

Earthing electrode shall consist of a Galvanized Cast Iron plate not less than 600 x 600 x 6

mm thick, or, 60 x 60 x 0.6 cm G.I. as called for in the drawings. The plate electrode shall be

buried as far as practicable below permanent moisture level but in any case not less than 3

mts. Below ground level. Wherever possible earth electrode shall be located as near the water tap, water drain or a down take pipe as possible. Earth electrodes shall not be installed

in proximity to a metal fence.

It shall be kept clear of the buildings foundations and in no case shall it be nearer than 1 meter

from the outdoor face of the wall. The earth plate shall be set vertically and surrounded with

150 mm thick layer of charcoal dust and salt mixture. 20 mm G.I. pipe shall run from the top

edge of the plate to the ground level. The top of the pipe shall be provided with a funnel and

a mesh for watering the earth through the earth. The main earth conductors shall be

connected to the electrode just below the funnel, with proper terminal lugs and checks

nuts. The funnel over the G.I. pipe and earth connections houses 300 mm wide and 300

mm deep. The masonry chamber shall be provided with a cast iron cover resting cover a C.I.

frame embedded in masonry.

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TECHNICAL SPECIFICATIONS FOR LT XLPE CABLES

1.0 Scope of Work

This section shall cover supply, laying, testing and commissioning of medium voltage XLPE

cables.

This specification gives the general requirement of cables. However, it is the responsibility of

the vendor to take the joint measurement and obtain client’s approval before the placement

of orders to the main supplier / manufacturer.

1.1 LT Power Cables - General Description:

Electrolytic grade of Aluminium / high conductivity annealed copper conductor, as per IS :

7098, XLPE insulation, all sector shaped cores laid up with PP filler and PP tape (in case of

extruded PVC inner sheath), taped/ extruded PVC inner sheath as per IS : 5831, armoured as

per IS : 3975 and overall Flame Retardant ST2 PVC sheath as per IS:5831, 1100 Volts grade

cable as per IS : 7098 (I).

1.2 LT Control Cables - General Description:

Plain annealed electrolytic grade of Copper conductor, as per IS : 8130, PVC insulation as per IS : 5831, cores laid up, STI PVC inner sheath as per IS : 5831, armoured as per IS : 3975 and

overall STI PVC sheath as per IS : 5831, 1100 Volts grade cable as per IS : 1554 (I).

1.3 Conductor:

Conductor shall be stranded above 10 sqmm in case of Aluminium cables, and above 6

sqmm in case of copper cables, below which it shall be solid conductor. On customer

demand stranded conductor can be supplied. Stranded conductor are shaped and

compacted to reduce dimension and give a smoother profile.

Strand details shall be as below :

1.5 to 10 sqmm (CU) - 7 Strands

6 to 10 sqmm (AL) - 1 Strands

16 to 50 sqmm (CU/AL) - 7 Strands

70 to 150 sqmm (CU/AL) - 19 Strands 185 to 300 sqmm (CU/AL) - 37 Strands

400 to 630 sqmm (CU/AL) - 61 Strands

800 to 1000 sqmm (CU/AL) - 91 Strands.

1.4 Insulation :

Insulation shall be of cross linked polyethylene with IR value more than 100 Mega .ohm/km for

power cables and shall be of PVC type A with IR value more than 50 Mega Ohm/km for PVC

cables.

XLPE : Insulation having dielectric strength between (25 – 30 KV/MM)

PVC Type A : Insulation having dielectric strength between (30 – 36 KV/MM)

1.5 Inner sheath :

Inner sheath of ST-2 PVC along with Polypropylene (PP) fillers, in case of Taped Inner Sheath.

For extruded PVC inner sheath (if required) PP Fillers shall be provided with a binder of PP

Tape.

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1.6 Armour :

ISI Marked armour, as per IS : 3975 should be provided over inner sheath to guard against

mechanical damage. Armour should be galvanized steel wire/ strip. In case of single core

cables used in A.C Systems, armouring should be non magnetic hard drawn aluminium wire/

strip. Round steel wire should be used where diameter over inner sheath is less than 13mm

and flat steel strip armour when diameter over inner sheath exceeds 13 mm. Round wire can

be provided on specific request.

Armour coverage to be more than 95% to achieve better mechanical projection and low

armour resistance.

1.7 Outersheath :

Outer sheath is of extruded ST-2 Flame Retardant PVC compound, black in colour as per IS :

5831. Having Oxygen index value of min 30%.

Outer sheath shall be resistant to terminate and rodent attack.



Sr.

No

Item Relevant IS Relevant IEC

1 XLPE insulated electric cables (heavy duty). IS : 7098 Part I

2 Recommended current ratings for cables. IS : 3961

3 Aluminium conductors for insulated cables IS : 8130 Indian Electricity Act and Rules.

3.0 Technical Requirements

3.1 General constructional features

The medium voltage cables shall be supplied, laid, connected, tested and commissioned in accordance with the drawings, specifications, relevant Indian Standards specifications,

manufacturer’s instructions. The cables shall be delivered at site in original drums with

manufacturer’s name, size, and type, clearly written on the drums.

3.2 Material

Medium voltage cable shall be XLPE insulated. PVC sheathed, aluminium or copper

conductor, armoured conforming to IS: 7098 Part I

3.3 Type

The cables shall be circular, multi core, annealed copper or aluminium conductor, XLPE

insulated and PVC sheathed, armoured or unarmoured.

3.4 Conductor

Uncoated, annealed copper / aluminium, of high conductivity upto 4 mm.² size, the

conductor shall be solid and above 4 mm.², conductors shall be concentrically stranded as

per IEC : 228.

3.5 Insulation

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XLPE rated 70° c. extruded insulation.

3.6 Core Identification

Two core : Red and Black

Three cor : Red, Yellow and Blue

Four core : Red, Yellow, Blue and Black

Single core : Green, Yellow for earthing

Black shall always be used for neutral.

3.7 Assembly

Two, three or four insulated conductors shall be laid up, filled with non-hygroscopic material

and covered with an additional layer of thermoplastic material.

3.8 Armour:

Galvanised steel flat strip / round wires applied helicaly in single layers complete with covering

the assembly of cores.

For cable size upto 25 Sq. mm. : Armour of 1.4 mm dia G.I. round wire

For cable size above 25 Sq. mm. : Armour of 4 mm wide 0.8 mm thick G.I strip

3.9 Sheath

XLPE 70 deg.c. rated extruded.

Inner sheath shall be extruded type and shall be compatible with the insulation provided for

the cables.

Outer sheath shall be of an extruded type layer of suitable PVC material compatible with the

specified ambient temp. 50 deg. C and operating temperature of cables. The sheath shall be resistant to water, ultraviolet radiation, fungus, termite and rodent attacks. The colour of outer

sheath shall be black.

Sequential length marking required at every 1.0 mtr. interval on outer sheath

Vendor has to furnish resistance / reactance / capacitances of the cable.

3.10 Rating: Up to and including 1100 Volts.

4.0 Drawings & information

Contractor shall submit the as built drawing of the cable laying drawing.

HANDINGOVER DOCUMENTS

The supplier shall submit following: 1. Data sheet indicating results of tests

2. Test reports

5.0 Inspection and testing

All cables shall be adequately protected against any risk of mechanical damage to which

they may be liable in normal conditions of handling during transportation, loading, unloading

etc.

The cable shall be supplied in single length i.e. without any intermediate joint or cut unless

specifically approved by the client.

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The cable ends shall be suitably sealed against entry of moisture, dust, water etc. with cable

compound as per standard practice.

6.0 Routine test

a) Conductor resistance test.

b) High voltage test.

c) Partial discharge test (for screened cable only)

(to be carried out on full drum length).

7.0 Type Test

a) Tests on conductor Annealing test for copper Tensile test (for aluminium) Wrapping test

(for aluminium) Resistance test.

b) Test for armoring wire/ strips Tensile strength & elongation at break Thickness of zinc

coating (Dip Test) Torsion/ Winding test Resistivity Test Mass of Zinc coating test.

c) Test for thickness of insulation and sheath.

d) Physical tests for insulation Tensile strength & elongation at break ageing in air oven hot

set test Shrinkage test Water absorption (gravimetric).

e) Physical test for outer sheath Tensile strength & elongation at break ageing in air oven

Shrinkage test Hot deformation. f) Insulation resistance (volume resistivity test)

g) High voltage test

h) Flammability test

i) Bleeding and blooming test (for outer sheath).

j) Partial discharge test.

k) Bending test.

l) Impulse withstand test.

m) Each core of cable shall be tested at room temperature at 3 KV A.C.

R.M.S. for duration of 5 minutes.


The cables will be measured in meters. The unit rate shall include cutting the cable into

required lengths, packing, loading, unloading, insurance, transportation, delivery to stores/site

as per work order, stocking in stores, testing of cables at stores etc. of medium voltage cable.

Total quantity in meters shall be measured lug to lug basis.

9.0 Data sheet for cables

(Must be furnished along with the quotation for all cable of conductor size 50 Sq. mm and

above).

Sr. No. DESCRIPTION GUARANTEED PARTICULARS

1.0 Name of Manufacturer

2.0 Conductor

3.0 Form - circular/ segmented

4.0 Cross sectional area mm²

5.0 Whether cores identified by colours Yes/No

6.0 Overall dia. of finished cable

7.0

Critical Oxygen Index Value at 750oC when tested

for temperature index test as per ASTMD-2863

8.0

Total acid gas generation by weight when tested as

per IEC 7541

%

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9.0 Percentage of light transmission under fire for

assessment of smoke generation when tested as per ASTM-D-2843.

%

10.0 Will cables offered pass the flammability tests as per:

a) Class-F3-Swedish Standard S5-424-1475

b) IEC 332-1

c) IEC 331-1

Yes/No

Yes/No

Yes/No

TECHNICAL SPECIFICATIONS FOR HT XLPE CABLES

1. Scope of Work

This section shall cover supply, laying, testing and commissioning of High voltage XLPE cables.

2. General Description:

All high voltage cables shall have a minimum rated voltage 33 KV (Earth Grade), cross-linked

polyethylene insulated, armoured and PVC sheathed. All cables shall be of 33 KV 3C

aluminum conductor, extruded shielded, cross-linked polyethylene (XLPE) insulated, semi-

conducting tape shielded, copper tape screened, assembled with non-hygroscopic fillers,

PVC separation sheathed, galvanized steel armoured and PVC outer sheathed power cable.

3. Material and Construction:

3.1 Conductor

The conductor shall consist of compacted circular (Class 2) stranded annealed plain

aluminum wires in accordance with IEC Pub 228.

The conductor shielding shall consist of extruded semi-conducting compound. A semi-

conducting separator tape may be applied between the conductor and the semi-

conducting compound layer at manufacturer’s discretion, if necessary.

3.2 Insulation

The insulation shall consist of extruded cross-linked polyethylene (XLPE).

The average thickness shall be not less than the specified nominal value. The

minimum thickness at any point shall not fall below the nominal value by more than

0.1mm plus 10% of the nominal value. The insulation shielding shall consist of a semi-

conducting tape applied with an overlap. Metallic screen shall consist of an

annealed plan copper tape applied with an overlap. The screened cores shall be

assembled together with non-hygroscopic fillers. The direction of lay shall be left

hand. A non-metallic binder tape(s) shall be applied over the assembled cores. The separation sheath shall consist of extruded black PVC. Minimum thickness at any

point shall not fall below 80% of the nominal value by more than 0.2mm. The armour

shall consist of one layer of galvanized steel wires; except for single core cables

which shall have aluminum sheathe and aluminum wire armouring. Nominal

diameter of each wire shall be 3.15mm. A suitable binder tape may be applied

over the armour at manufacturer’s discretion, if necessary. The outer sheath shall

consist of anti-termite treated and extruded red PVC compound. The minimum

thickness at any point shall not fall below the specified nominal value by more than

0.2mm plus 20% of the nominal value.

4. Core identification

The core identification shall be carried out by coloured narrow tapes longitudinally

applied over the insulation shielding. Colour: Red, Yellow and Blue.

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5. Packing

The cable shall be wound onto non-returnable strong and seaworthy reel lagged

with wooden or steel battens.

6. Installation

This Contractor shall include for provision, installation, testing and commissioning of

all cables and accessories specified herein, shown on the Drawings and those

items not expressly specified but required to meet the design intent of this Section.

Although interfaces of this Contract are identified within the Contract Documents,

the Contractor should satisfy himself as to the extent of the cabling works involved,

and if unsure, should contact the Consultant before returning his tender.

MAKE OF MATERIAL

SR.NO. ITEM STANDARD MAKE

1 DRY TYPE TRANSFORMER VOLTAMP / CROMPTON GREAVES / KIRLOSKAR / ABB

2 HT XLPE CABLE POLYCAB / RPG / KEI

3 HT TERMINATION KIT RAYCHEM OR EQUIVALENT

4 HT JOINTING KIT RAYCHEM / MSEAL / OR EQUIVALENT

5 DISTRIBUTION BOARDS LEGRAND/HAGER /SCHNEIDER/C&S Electric

6 MEDIUM VOLTAGE CABLE POLYCAB/ FINOLEX / RRKABLE

7 CABLE TRAY INDIANA/OBO BETTERMAN/LEGRAND/PROFAB

8 LT SWITCHGEAR (ALL RANGE) SIEMENS / SCHNEIDER ELECTRIC / L & T / ABB

9 LT ACB SIEMENS / SCHNEIDER ELECTRIC / L & T / ABB

10 LT MCCB SIEMENS / SCHNEIDER ELECTRIC / L & T / ABB / LEGRAND

11 LT MCB, ELCB SIEMENS / SCHNEIDER ELECTRIC / HAGER /LEGRAND

12 LT SFU SIEMENS / SCHNEIDER ELECTRIC / L&T / ABB

13 LT CONTACTORS SIEMENS / SCHNEIDER ELECTRIC / L & T / ABB

14 CHANGE OVER SWITCH HPL / SOCOMEC

15 METERS (DIGITAL) AE / ENERCON / SCHNEIDER / MECO / NIPPEN

16 LOAD MANAGER ENERCON / NIPPEN/ L & T

17 RELAYS SIEMENS / SCHNEIDER ELECTRIC / GE / L & T

18 INDICATING LAMPS SIEMENS / SCHNEIDER ELECTRIC / L & T / ABB

19 ELECTRIC TIMER SIEMENS / EAPL

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MAKE OF MATERIAL

SR.NO. ITEM STANDARD MAKE

20 SELECTOR SWITCH KEYCEE / SALZER

21 APFC RELAY ENERCON / L & T / TRINITY

22 LT CAPACITORS L & T / EPCOS

23 LUGS DOWELL’S / JAINSON / COMET

24 CABLE GLAND JAINSON / COMET

25 PVC CONDUITS AND

ACCESSORIES PRECISION / DIAMOND

26 CASING CAPING PRECISION / DIAMOND

27 M.S. CONDUIT AND ACCESSORIES AKG / BEC / STEELCRAFT

28 MODULAR SWITCHES, SOCKETS

& OTHER ACCESSORIES LEGRAND / SCHNEIDER / ABB

29 METAL CLAD SOCKET WITH MCB MDS / SIEMENS / LEGRAND

30 PVC JUNCTION BOX SINTEX / CLIPSAL / SPELSBERG

31 WIRES FOR INTERNAL WIRING POLYCAB/ FINOLEX / RRKABLE

32 FLEXIBLE WIRE POLYCAB/ FINOLEX / RRKABLE

33 MULTICORE FLEXIBLE CABLE POLYCAB/ FINOLEX / RRKABLE

34 CONNECTORS (COLOURS AS PER

PHASE & NEUTRAL) SALZER / ELEMEX / CONNECTWELL

35 LIGHT FIXTURES HAVELLS / WIPRO / PHILIPS / GEMINI GLOBAL

36 BATTERY EXIDE / AMCO

37 CEILING FAN / EXHAUST

FAN/WALL MOUNTED FAN CROMPTON / BAJAJ / ORIENT / HAVELLS

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