ipbd

TECHNICAL SPECIFICATION FOR

ISOLATED PHASE BUS DUCT

CORE ENGG ELECTRICAL

Document Number : REL-COENG-NEE-E21-P-00018 Sheet 1

STANDARD TECHNICAL SPECIFICATION

FOR ISOLATED PHASE BUS DUCT

Document Number

REL-COENG-NEE-E21-P-00018 Rev A

A For Review 30-03-2010 Binaya

Sahoo Ashok Bani Rabindran Sundersingh

Debabrata Guha

Technical lead

Custodian Revision No. Description Date

Prepared by

Reviewed By

Approved by




Document Number : REL-COENG-NEE-E21-P-00018 Sheet 2

INDEX

PART I

SECTION 1 INFORMATION TO BIDDER (ITB)

SPECIAL CONDITIONS OF CONTRACT (SCC)

COMMERCIAL EVALUATION FORMAT

SECTION 2 GENERAL CONDITIONS OF CONTRACT (GCC)

PART II TECHNICAL SPECIFICATION

SECTION A GENERAL TECHNICAL INFORMATION

(Project-specific variable section)

SECTION B (Not Used)

SECTION C DETAILED TECHNICAL SPECIFICATION

(Permanent section)

PART III

SECTION 1 ERECTION CONDITIONS OF CONTRACT (ECC)

SECTION 2 ENCLOSURES

SECTION 3 FQP (FIELD QUALITY PLAN)

PART IV DATA TO BE SUBMITTED BY THE BIDDER

SECTION 1 TECHNICAL DATA SHEETS

SECTION 2 SCHEDULES

SECTION 3 TENDER DRAWINGS




Document Number : REL-COENG-NEE-E21-P-00018 Part I Sheet 1

PART I

SECTION 1 INFORMATION TO BIDDER (ITB)

(To be provided by the C&C Department)

SPECIAL CONDITIONS OF CONTRACT (SCC)


COMMERCIAL EVALUATION FORMAT


SECTION 2 GENERAL CONDITIONS OF CONTRACT (GCC)





Document Number : REL-COENG-NEE-E21-P-00018 Part II Technical Specification Sheet 1

PART II TECHNICAL SPECIFICATION

TABLE OF CONTENT

1.0 SECTION A - GENERAL TECHNICAL INFORMATION .......................................................................................... 6 1.1 PROJECT DATA.................................................................................................................................................................. 6 1.2 INTENT OF SPECIFICATION ................................................................................................................................................ 6 1.3 SCOPE OF WORK ............................................................................................................................................................... 6

1.3.1 Scope of supply.......................................................................................................................................................... 6 1.3.2 Scope of service......................................................................................................................................................... 7

1.4 TERMINAL POINTS AND EXCLUSIONS ............................................................................................................................... 7 1.4.1 Terminal points.......................................................................................................................................................... 7 1.4.2 Exclusion from scope of work.................................................................................................................................... 7

1.5 LAYOUT ........................................................................................................................................................................... 8 1.6 SERVICE CONDITION ........................................................................................................................................................ 8 1.7 QUALIFYING REQUIREMENT OF THE BIDDER.................................................................................................................... 8 1.8 TECHNICAL PARAMETERS ................................................................................................................................................ 8 1.9 LIST OF MANDATORY SPARES ......................................................................................................................................... 11

2.0 SECTION B – NOT USED.............................................................................................................................................. 12 3.0 SECTION C - DETAILED TECHNICAL SPECIFICATION..................................................................................... 12 3.1 CODES & STANDARDS.................................................................................................................................................... 12 3.2 DESIGN CRITERIA ........................................................................................................................................................... 13 3.3 CONSTRUCTION.............................................................................................................................................................. 14

3.3.1 Enclosure................................................................................................................................................................. 14 3.3.2 Bus Conductor......................................................................................................................................................... 17 3.3.3 Disconnect Link....................................................................................................................................................... 18 3.3.4 Insulators................................................................................................................................................................. 18 3.3.5 Connections and terminations................................................................................................................................. 19 3.3.6 Grounding ............................................................................................................................................................... 20 3.3.7 Supporting Structures.............................................................................................................................................. 21 3.3.8 Hot air blowing device ............................................................................................................................................ 22 3.3.9 Air pressurization Unit............................................................................................................................................ 22 3.3.10 Space heater, Illumination ...................................................................................................................................... 26 3.3.11 Control Panel .......................................................................................................................................................... 26 3.3.12 Current Transformer ............................................................................................................................................... 27 3.3.13 Wiring...................................................................................................................................................................... 27 3.3.14 Painting ................................................................................................................................................................... 28 3.3.15 Nameplate ............................................................................................................................................................... 28 3.3.16 ERECTION AND COMMISSIONING..................................................................................................................... 24

3.4 PACKING ........................................................................................................................................................................ 25 3.5 INSPECTION & TESTING ................................................................................................................................................. 26

3.5.1 GENERAL ............................................................................................................................................................... 26 3.6 GENERAL REQUIREMENTS.............................................................................................................................................. 28

3.6.1 Proposal Data ......................................................................................................................................................... 28 3.6.2 Drawings & Annexures ........................................................................................................................................... 28 3.6.3 Completeness of supply ........................................................................................................................................... 29 3.6.4 Guaranteed Performance & Liquidated Damages.................................................................................................. 29 3.6.5 Deviation ................................................................................................................................................................. 29 3.6.6 Training ................................................................................................................................................................... 29 3.6.7 Drawing Approval ................................................................................................................................................... 30 3.6.8 Documentation ........................................................................................................................................................ 30

3.7 ANNEXURES............................................................................................................................................................... 32





3.7.1 Annexure A: Bill of Quantity ................................................................................................................................... 37 3.7.2 Annexure B: Single Line Diagram for IPB/ LAPT/NGT.............................................................................................. 3.7.3 Annexure C: Mandatory Spares .............................................................................................................................. 40 3.7.4 Annexure D: Quality Assurance Requirement ............................................................................................................. 3.7.5 Annexure E: IPBD LAYOUT ....................................................................................................................................... 3.7.6 Annexure F: Specification on painting .................................................................................................................... 41 3.7.7 Annexure G: Air pressurization Scheme.................................................................................................................. 44





1.0 SECTION A - GENERAL TECHNICAL INFORMATION

1.1 Project data

Insert the Project details here.

1.2 Intent of specification

This specification is intended to cover the design, engineering, manufacture, fabrication, assembly, inspection, testing at manufacturer's works, shop painting, supply & delivery, properly packed, transportation & delivery F.O.R. project site, of Generator Isolated phase Busduct with supporting structure and all accessories (LAPT Cubicle & NGT Cubicle may be included if not covered elsewhere, i.e. BTG Package) for efficient and trouble-free operation and performance of site acceptance tests. It is not the intent to specify complete specification, material list and requirement, however any such equipment/system required for successful operation of the equipment that is observed anytime during execution of the contract shall be supplied by the bidder with no implication whatsoever to the purchaser.

The scope of work shall also include the erection, site fabrication, testing, commissioning and putting into successful commercial operation of all equipment furnished under this specification.

1.3 Scope of work

1.3.1 Scope of supply 1. Design, engineering, manufacture, fabrication, assembly, inspection, testing at

manufacturer's works, shop painting, supply & delivery, properly packed, transportation & delivery F.O.R. project site, of :

2. Isolated phase Busduct consisting main run, (delta run for connecting three single phase transformers), neutral run and tap-off run including CTs in the tap off run with all accessories like terminal adaptor box, flexible conductor, bellows, seal off bushings, bends, matching flanges & hardware complete in nature, suitable for connection with Generator, PT/LA cubicle, NGT cubicle, Static Excitation Transformer where applicable, GCB where applicable, Unit Transformers and Generator Transformer.

3. Air Pressurizing unit 4. Portable Hot Air Blowing Unit 5. LAPT Panel (if not included in BTG) 6. NGT Panel (if not included in BTG) 7. Steel Structure supports 8. Mandatory Spares 9. One set of special tools and tackles 10. Start-up and commissioning spares 11. Recommended spare parts for five years of satisfactory operation 12. All relevant drawings, data and instruction manuals

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Please refer to CEA guidelines May'1992 section -7 clause 7.5 . It states that HOT AIR BLOWING is not required since busduct is pressurised

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Bidder to note here that any equipment/component not specified in this specification, but required for successful operation of the equipment/system being supplied by the bidder shall be supplied without any implication to the purchaser.

1.3.2 Scope of service The scope covers the services of a senior engineer on per diem basis for

1. Complete checking of materials at site and advising the Owner of any discrepancy thereof 2. Unloading, storage, transfer, site fabrication, field quality checks, Erection, Testing &

Commissioning, trial operation and handover of complete system.

3. Training of Purchaser / Owner’s engineers for two days shall be included in the basic rate

1.4 Terminal points and Exclusions

1.4.1 Terminal points 1. Generator Bus Duct

1.1 Generator Phase Lead terminal bushing & terminal flange(SP Adaptor box in bidder’s scope)

1.2 GT Terminal Bushing & terminal flange

1.3 UT Terminal Bushing & terminal flange

1.4 GCB – Both end terminal/flange (if applicable)

1.5 Static excitation transformer terminal bushing (if applicable)

1.6 LAPT Terminal bushing & terminal flange

1.7 Generator Neutral Lead terminal bushing and terminal flange

1.8 NGT Terminal bushing & terminal flange

2. Air pressurizing System: Flange in compressed air pipe for tee-off connection with the Plant compressed air system.

3. Power & Control Cable: At Terminal Blocks

4. Support Structure: Concrete footings/inserts. (foundation bolts/anchor fasteners to be supplied by bidder well in advance for embedment into concrete pedestal)

5. Earthing : At ground pad on bidder’s supplied equipment

1.4.2 Exclusion from scope of work 1. Civil works (foundation bolts/anchor fasteners to be supplied by bidder well in advance

for embedment into concrete pedestal)

2. Primary & Secondary earthing

3. Interconnecting Power and Control cable

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In case of SEC supplied generator , the connection between generator neutral and NGT is by 20 KV cable

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1.5 Layout

Refer to Annexure B for the Layout arrangement of the IPB and associated equipment.

1.6 Service Condition

Design engineer to update as per requirement 1. Ambient air temperature 0°C to 50°C 2. Altitude <= 1000 meter 3. Average Relative Humidity <= 95% 4. Degree of pollution III as per

IS 13134 : 1992 5. Vibration due to earth (tremor or other external cause) As per IS 1893

1.7 Qualifying Requirement of the Bidder

1. Necessary information about the financial and technical resources, organisation & experience to undertake the supply of such equipment shall be submitted by the Bidder as an evidence of his capability for satisfaction of the Purchaser.

2. The Bidder shall submit along with his bid a list of major contracts of supply and erection of similar equipment already executed or under execution, giving detailed particulars such as equipment rating, contract value, name of the Owner, year of commissioning etc

3. Apart from the requirements stipulated elsewhere in this specification, the following shall constitute the minimum technical qualifying requirement of the bidder offering against this bid:

3.1 The bidder must be an established manufacturer or supplier of generator busduct as per requirement of the specification and must have tested, supplied and commissioned equipments of similar or higher rating in not less than three projects. Such equipments shall have been in successful operation for at least three years on the date set for opening of the bid and bidder shall provide requisite credentials to support this.

3.2 The bidder must be a regular manufacturer of generator bus duct and must have facilities to manufacture the generator busduct of the type and rating specified

3.3 Notwithstanding anything stated above, the purchaser reserves the right to assess bidder’s financial and other capabilities to execute the contract

1.8 Technical Parameters GENERATOR BUSDUCT

1. Type Isolated Phase Bus duct, continuous (bonded enclosure) natural air cooled type.

2. Service Partial indoor & Partial outdoor

3. Phase 3 isolated phase

4. Mounting Horizontal on steel support structures

5. Location Check the Layout attached

6. Construction Welded construction, electrically continuous, only equipment termination end is bolted connection.





7. Material 7.1 Bus Conductor High Conductivity Al. /Al. Alloy. Grade shall be same as

of type tested one of similar rating. 7.2 Enclosure Al. Alloy. Grade shall be same as of type tested one of

similar rating. 8. Enclosure Protection

8.1 Indoor IP-52

8.2 Outdoor IP-55 weatherproof, All outdoor joints shall have appropriate Rain Canopy structure. No joints, bolts shall be exposed to rain or rain water flow.

9. Phase Spacing If there is a restriction due to layout, Design engineer may specify the same, else leave it to the bidder for its type tested design.

10. Nominal System Voltage As per project data 11. Rated Maximum Voltage As per project data 12. Neutral Grounding High resistance grounded 13. Insulation Level

13.1 Rated one minute power frequency withstand Voltage (kV rms)

As per IS 8084 (Amendment No. 3-Table 1)/project data

13.2 Rated Lightning Impulse Voltage (1.2/50) (kV peak)

As per IS 8084 (Amendment No. 3-Table 1)/project data

14. Creepage distance (mm/KV)

20 mm/KV

15. Phase to earth clearance (mm) As per IEC-60071-1 (Table A.1) 16. Rated frequency 50 Hz 17. Frequency variation +3/-5 % 18. Rated Continuous current

18.1 Main Run As per IPB sizing document

18.2 Tap off Run (To UT, LAPT & Static excitation transformer)

As per IPB sizing document

18.3 Delta Run (where applicable) As per IPB sizing document

18.4 Common Portion of Tap-off As per IPB sizing document

18.5 Neutral Run As per Tap off Run

19. Rated hottest spot temperature rise above ambient 50 deg C

(Max. rise allowed including rise in Temp due to effect of Solar Radiations)

19.1 Bus Conductor a) Plain bolted joints 40 deg C b) Silver plated bolted joints 55 deg C c) Aluminium welded joints 55 deg C

19.2 Enclosure & support structure

30 deg C

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This can be specified as 19501 grade for conductor and enclosure of main and delta runs . For tap off run it should be 63401 for conductor and 19501 for enclosure

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should be as per IS 2544 table 6 - heavily polluted atmosphere

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no neutral run is applicable in case of SEC supplied generators





20. Short time withstand current (Avg. value of rms symmetrical current over 1 sec) a) Main Run As per IPB sizing document b) Tap-off As per IPB sizing document c) Delta Run As per IPB sizing document 21. Short circuit withstand rms

asymmetrical current (rms asymmetrical current including DC components)

a) Main Run As per IPB sizing document

b) Tap-off As per IPB sizing document

c) Delta Run As per IPB sizing document

22. Peak Momentary Withstand Current

(Peak value of symmetrical plus asymmetrical current)

a) Main Run As per IPB sizing document

b) Tap-off As per IPB sizing document

c) Delta Run As per IPB sizing document

23. Cooling of IPBD Self cooled 24. Tap off CTs

24.1 BIL Level As per Table 1A of IS 2705 (part-1)

24.2 Short Circuit level To match with tap-off busduct

24.3 UT Differential (Core-1)

i. Current Ratio As per project data

ii. Knee point voltage (V) As per project data

iii. Excitation Current (mA) As per project data

iv. Secondary Resistance (Ohm) As per project data

v. Class As per project data

24.4 UT Over-current (Core-2)




iv. Secondary Resistance (Ohm As per project data


24.5 Overall differential (Core-3) in UT Tap-off








iv. Secondary Resistance (Ohm) As per project data


1.9 List of Mandatory spares

Refer to the Annexure D for the List of Mandatory spares





2.0 SECTION B – NOT USED

3.0 SECTION C - DETAILED TECHNICAL SPECIFICATION

3.1 Codes & Standards

The installation shall meet the requirements of Indian Electricity rules. Materials, equipment and methods used in the manufacture shall conform to the latest edition of IS and IEC standards, including the following. If standard other than IS/IEC are used in design, manufacturing & testing, a copy of the same in English shall be submitted with the Bid.

IEEE Std C37.023

Metal Enclosed Busduct

C37.20a,C37,20b, ANSIC37.20 C37.20c, (IEEE-27):

Switchgear assemblies including metal enclosed bus

IEEE Std C37.24™-2003

IEEE Guide for Evaluating the Effect of Solar Radiation on Outdoor Metal-Enclosed Switchgear

IS 8084 Interconnecting busbars for AC voltages above 1 KV up to and including 36 KV

IEC 60044 Current transformers IS:2705 Current transformers IS: 3156 Voltage transformers IEC 62271-102 Disconnecting Switch IS: 9921 Disconnecting Switch IS: 3151 Neutral Grounding transformer IEEE-32 Earth Resistor IS-3070 Pt.III Lightening Arrestors IS: 2071 High Voltage testing techniques IEC-60071-1 Insulation Co-ordination BS:3816 Cast Epoxy resin insulating material for electrical application at power

frequency IS:5082 & IS 5404

Wrought aluminum and aluminum alloy for electrical purposes

IS:4759 Hot dip zinc coating on structural steel and allied products IS 3347 Porcelain bushings

IS:2544 Porcelain post insulator for voltages above 1000V. IS:2099 Bushings for alternating voltage above 1000V. IS:9431 Specification for indoor post insulators of organic material for systems with

nominal voltages greater than 1000 volts up to and including 300 KV IEC 60445 Identification of Equipment Terminals and of Terminations of Certain

Designated Conductors, Including General Rules for an Alphanumeric System.





IEC 60060 High voltage test techniques IEC 60947 Low-Voltage Switchgear and Control gear. IS:13947 LV switchgear and Controlgear-Part1 IS:1367 Hot dip galvanized coatings on fasteners. IS:2633 Methods of testing uniformity of coating on zinc coated articles. IS:226 Structural Steel (Standard Quality) IS 2062 Steel Supports IS 800 Code of practice for general construction in steel

IS 2062 Steel for General Structural Purposes - Specification

IS 3757 Specification for High Strength Structural Bolts

IS 6649 Specification for Hardened and Tempered Washers for High Strength Structural Bolts and Nuts

IEC-60529 Degree of protection provided by enclosures (IP Code) Indian Electricity Rules & National Electricity Codes

Indian electricity act

CBIP manual on busduct 2007 - Publication number 303

3.2 Design criteria

1. The Bus duct shall be designed for indoor/outdoor service suitable for hot, humid and dusty environment. Effect of solar radiation shall be taken into consideration while sizing the busduct.

2. The Bus duct shall be continuously carrying current mentioned in the datasheet at the maximum ambient specified in outdoor application without exceeding the temperature limits.

3. The isolated phase bus duct system shall be provided as a complete sectionalized assembly of rigid insulator (3/4 insulators per support) supported conductors, housed in individual phase enclosures. The maximum shipping length shall be restricted to six meters.

4. A slit shall be kept between enclosure (phase segregated generator terminal adaptor) and generator flange. Suitable covering shall be provided on the slit to allow escape of hydrogen and at the same time prevent entry of rodents/rats etc. The busduct shall not take any support from generator terminal lead box flange & it shall be self supportive.

5. Suitable means shall be provided to isolate vibrations from all equipment. Flexible connections both for conductor and enclosure will be provided at Generator terminal (line and neutral), GCB terminal (both end) if applicable, GT, UT, Static excitation transformer if applicable & NGT panel to isolate the vibration from rest of the bus structure. Flexible conductor & expansion bellows shall also be used in the main run to absorb the expansions in the main run length. All the bellows in main run length shall be metallic type for electrical continuity while other equipment terminal bellows shall be either neoprene/EPDM rubber. Bidder shall furnish the detail calculation supporting the selection of number and size of expansion bellows and flexible.





6. Bus duct and auxiliary equipment shall be capable of withstanding the electromechanical stresses that may arise during normal and abnormal conditions as a result of flexing, vibration, variations in load or temperature, switching, short-circuit, faulty synchronizing, flashover, or other system causes. Necessary calculations shall be submitted for purchaser’s approval.

7. The contractor shall design the busduct and supporting structure in such a way as to permit transformers, GCB if applicable, LAPT, NGT & excitation transformer if applicable removal, after opening the terminations but without dismantling busduct run or supporting structure.

8. The bidder shall supply adaptor box for all terminations that would include generator phase and neutral side, GT LV terminal, both UT HV terminal, VT &SP panel terminal, static excitation transformer terminal if appliacable and generator circuit breaker terminal if applicable. The bidder shall design and manufacture terminal adaptor to match with the terminal flange of the equipment described and shall meet in all respect the relevant standards for busduct termination. Termination details of other end equipments shall be submitted during detail engg.

9. All components in the scope shall have tropical finish and protection.

10. Bidders in their offer shall submit conductor and enclosure sizing calculation w.r.t. current carrying capacity, resistivity required for permissible thermal limits, forces between different conductors in short circuit conditions, skin effect and proximity effect, effect of solar radiations on temperature rise and seismic conditions. KW loss calculation for conductor & enclosure also shall be furnished with the offer. However, bidder shall take an approval from the purchaser for all these calculations in case of award of contract before start of manufacture.

11. Air pressurizing units shall be supplied for keeping the busduct pressurized with guaranteed leakage rate of maximum 5% per hour of total volume. Bidder shall perform site acceptance test for the same.

12. Bidder shall be responsible for coordinating with Generator, GCB if applicable, GT, UAT, static excitation transformer if applicable vendor for interfacing. Bidder shall coordinate with the equipment supplier and design the interfacings accordingly.

13. All parts and sections shall be properly identified with part numbers.

3.3 Construction

3.3.1 Enclosure 1. Type Each phase shall be enclosed in a weather-proof, dust-tight,

non-magnetic metal (aluminium alloy) and continuous type enclosure. The enclosure shall be designed for welded connection suitable for outdoor installation.

2. Material Aluminium Alloy 3. Thickness Bidder shall furnish supportive calculation for sizing.

Bidder shall take approval from the purchaser for manufacture clearance.

4. Electrically Bonded continuous Type

The bus enclosures shall be electrically bonded to minimize induced currents in the surrounding metal structures. Each bus enclosure and each electrical connection between bus enclosures shall provide a continuous path for the currents equal to the maximum current ratings of the enclosed bus. A continuous isolated phase bus enclosure, also referred to as a





"bonded" enclosure in ANSI C37.23, shall be provided. Busduct shall be manufactured in section and bonded at site to make complete assembly.

5. Total Conductor flux outside Enclosure

The enclosure shall be minimum flux type to permit not more than five (5) per cent of total conductor flux outside enclosure.

6. Expansion Bellows in Enclosure

Means shall be provided to take care of expansions due to temperature variation and vibration isolation by provision of expansion bellows at equipment terminations and also in main run. The quantity of flexibles and expansion bellows in busduct shall be based on the supporting arrangement of bus bar/enclosure and the operating temperature range. Bidders shall consider the exact requirement of flexibles and expansion bellows and consider the same in their scope. Metallic bellows (Non-Magnetic) along with necessary flexible links (to ensure required X-section) shall be provided in bus duct run and at the termination at GCB on the generator and generator transformer side. Rubber bellows shall be provided on all equipment termination except for GCB.

7. Type of Rubber Bellows

Rubber bellows shall be weatherproof, long life, non-deteriorating type without any adverse impact with exposure to sunrays, rain etc. The type of bellows shall be subject to purchaser’s approval.

8. Enclosure Shorting Link

Phase enclosures shorting links (Aluminium Alloy) rated for continuous FL current shall be provided at bus duct termination on generator, GT, UT tap off, LAPT tap off and excitation transformer tap off.

9. Bonding with GCB enclosure (if applicable)

The generator breaker (furnished by others) is an integral part of the isolated phase bus duct system; the isolated phase bus duct manufacturer's enclosure design shall include the generator breaker enclosure as part of the bonded enclosure system. The contractor shall co-ordinate with GCB supplier for relevant input.

10. Equipment Terminal end insulation

The enclosure shall be insulated at the connections to the generator, transformers and other equipment so that the longitudinal current shall not flow through or be transmitted to any connecting equipment. The insulation shall be non-deteriorating.

11. Equipment Terminal load transfer

Bidder should ensure that no load is transferred on electrical equipment transformers, generator terminals, Excitation transformer bushing etc. by the bus duct.

12. Insulators Enclosures supported on steel structures shall be insulated from the support steel through insulators. The insulation shall be non-deteriorating type & subject to purchaser’s approval.

13. Inspection Opening Neoprene rubber Gasketed inspection opening/split covers shall be provided to allow easy access for installation,

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insulated feet should be used for supporting the enclosures on the steel structure





inspection, replacement or repairs of the insulators, disconnects, bus connections and terminations and Current transformers. Inspection covers/split covers should be connected electrically to the main duct by flexible braids for proper earthing.

14. Wall Frame Assembly Wall-frame and support plates shall be provided where the bus duct run from indoor to outdoor penetrating the building wall. No weight shall be transferred to the electrical equipments, generator terminals, GCB terminal, generator transformer and building wall/structures. No seal of bushing is envisaged due to dry air being used.

15. Filtered Drain Tap Filtered drains tapping with dual stop cocks shall be provided for drainage of condensate at the lowest point and at such other locations where accumulation of condensate can be expected. In particular a drain valve shall be provided at the lowest point of transformer end termination.

16. Enclosure Support The enclosures of all three phases shall be rigidly supported by cross members to maintain parallel alignment.

17. Hot air blowing equipment

Enclosures should be designed suitably for connection with a hose pipe coming from air blowing system. The point of entry of hot air shall be just near the powerhouse building (indoor side). The diameter of the hose pipe connection shall be decided during the detailed engineering. The designed velocity shall be such that it cleans all accumulated dirt and drying is completed in one hour time.

3.3.2 Bus Conductor 1. Material & Grade The bus conductor shall be of high conductivity, aluminium/

aluminium alloy supported on wet process porcelain insulators. The grade shall be same as that of type tested design of the manufacturer.

2. Size of Conductor The conductor size shall be selected to meet continuous operation at rated current at maximum ambient condition without exceeding allowable temp rise specified in technical parameter and also shall meet the static/dynamic forces arising out of short circuit condition. De-rating factors as applicable shall be considered. The sizing calculation shall be submitted for purchaser’s approval.

3. Conductor Connection The bus conductor shall be designed for welded connections except at equipment terminations, bolted disconnect links and bolted flexible. Detailed welding procedure adopted by the manufacturer should be furnished during detail engineering and approved by the owner.

4. Flexible conductor Flexible connections shall be provided between bus sections to allow for expansion and contraction of the conductor. Flexible connection shall also be provided at all equipment terminations. Flexibles shall be generally of copper braids

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the requirement of hot air blowing equipment in pressurised busduct needs to be checked





silver plated with bolted connection. The current carrying capacity of the flexibles shall be 110% of the busbar rating.

5. Number of Flexibles & Size

As a minimum each equipment terminals and straight main run will have one set of flexible, however It is the bidder’s responsibility to ensure sufficient numbers of flexible joints are provided to ensure thermal expansions and vibrations are taken care of without any undue stress on insulator supports The sizing calculation substantiating the selection of flexible shall be submitted for purchaser’s approval

6. Silver Plating & Hardware

All contact surfaces shall be silver plated to ensure an efficient and trouble-free connection. Silver plating details, procedure shall be furnished for purchaser’s approval.

7. Connection Hardware All connection hardware shall be non-magnetic and shall have high corrosion resistance.

8. Removal of equipment The bus shall be designed to permit removal of transformer and generator bushings with a minimum of bus disassembly, and without cutting and re- welding of any part.

3.3.3 Disconnect Link 1. Material Shall be same as that of conductor. 2. Isolation Distance A minimum clearance of 300 mm. shall be provided between

the disconnected bus sections with the link removed 3. Removal/ Reinsertion Disconnect link shall consist of a removable section of

conductor and shall be so constructed as to permit easy removal or reinsertion without alignment difficulties.

4. Links The bus on both sides of the link shall be rigidly supported so that the disconnect link is equal in mechanical strength to any other section of the bus.

5. Location/ Provision Disconnect link shall be provided in the main bus between the generator, generator breaker if applicable, generator step up transformer, static excitation transformer if applicable, unit transformers and tap-off to the surge protection & potential transformer and NGT. The links shall be easily removable.

3.3.4 Insulators

1. Type of Insulator Bus support insulators shall be interchangeable, high creep and high strength, wet process, fine glazed porcelain or high strength cast resin insulators, suitable for pollution level specified elsewhere in the specification.

2. Number of Insulator It is up to the bidder to decide the number of insulators at every support. However bidder’s design must be type tested to withstand the mechanical forces as per the fault levels of this project. Minimum three insulators at each support shall be provided.

3. Removal/Replacement Insulator shall be mounted in such a way so as to permit

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Please check if shorting links is to be mentioned in the specification





easy removal or replacement without disassembly of the bus.

4. Conductor mounting on Insulator

The conductor shall be fastened on the insulator through fixed and slip joints so as to allow conductor expansion or contraction without straining the insulator. Positive contact shall be made between end caps of the supporting insulators and the conductors. Insulator shall be designed to avoid any stresses due to expansion and contraction and stress concentration due to direct engagement of the insulator with the metal fittings

5. Insulating support at bends/tap offs

Additional support insulators shall be provided at bend, at tap offs for withstanding all possible forces.

6. Inspection Window Inspection window with neoprene rubber gasket for proper sealing shall be provided for each insulator.

7. Span of Insulators The span and number of insulators required shall be decided based on the expected dynamic forces due to short circuit and other forces, the same shall be supported with calculations. A safety factor of 2.5 shall be considered while calculating the support span.

8. Insulator test requirement

All the insulators shall be type approved by reputed testing authority and shall be routine tested as per relevant IS. Type test certificate not conducted later than five years shall be submitted for approval, failing which the bidder shall take up the type tests at no extra cost to purchaser

3.3.5 Connections & Terminations 1. Accessories for

termination All matching flanges, terminal adaptors, seal-off bushings, gaskets, fittings, hardware and supports required for termination of the bus duct at the generator, generator circuit breaker, generator step up transformer, excitation transformer and unit transformers and other equipment shall be provided.

2. Termination Adaptor Adaptor of suitable dimension shall be supplied to match with terminating equipment.

3. Co-ordination with associated equipment supplier

In this connection the contractor is required to co-ordinate through the Engineer with the suppliers of the generator, GCB, generator transformer, unit transformers, excitation transformer with regard to connection details, mechanical and thermal stresses

4. Flexible connection at terminating end

Flexible connections both for conductor and enclosure shall be furnished at all equipment termination to provide for misalignment up to 25 mm in all directions. Flexible connection shall also be provided between bus duct supported from building steel and that supported by turbine foundation to prevent transmission of vibration.

5. Isolation distance i. A minimum clearance of 300 mm shall be provided between the end of the bus and the equipment terminals

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Conductor mounting on insulator can also be of floating design with busbar held by three insulators located 120 degree apart.





when flexible connections are removed. ii. Connections and their enclosures shall be such that they

will serve an additional function as disconnect links. iii. The equipment terminal connections shall be readily

accessible and shall provide sufficient air gap for safe isolation of equipment during testing.

6. Bimetallic Plate If the material of bus conductor and that of the equipment terminal connectors are different then suitable bi-metallic connectors shall be provided by the bidder.

7. Seal off bushing Seal off bushings shall be provided at the generator end of the bus duct, GT end, UT end, excitation transformer end, LAPT end, NGT end.

3.3.6 Grounding

1. Enclosure as Ground conductor

The electrically continuous bus enclosure shall be used as the ground bus.

2. Grounding All parts of the bus enclosure, supporting structures and equipment frames shall be grounded such as CT terminal box, wall frame assembly, generator adaptor box etc.

3. Ground pad Ground pad shall be provided at the following locations on the IPBD. Pads shall be of bolted type to accommodate 75 x 10 mm galvanized steel flats.

i. Generator end ii. Generator breaker end (generator side end and GSU side

end) iii. Main run at connection to the delta bus iv. Generator transformer end v. Unit transformer end

vi. Voltage transformer & surge protection cubicle end vii. Excitation transformer

viii. Neutral Grounding Cubicle

3.3.7 Supporting Structures

1. Scope Bidder shall supply all supporting structures required for supporting the Busduct on support structure post and hanger as applicable. These include all members, indoor/outdoor posts, bolts, anchors, shims, base plates, beams, hangers, brackets, bracings and other hardware as required for complete support. Purchaser will provide only concrete pedestal at ground level, bolts if any to be erected in the concrete shall be supplied by the bidder in advance.

2. Material Hot dipped Galvanized steel 3. Insulator between

structure with enclosure

The isolated phase busduct enclosure shall be insulated from structure using high strength non-deteriorating type moulded insulators.

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Seal off bushing is only required at the generator end and LAVT cubicle end . No seal off bushing is required at GT / UT end since the transformer bushings shall serve the purpose . No SOB is applicable for NGT for SEC design . The requirement of seal off bushing at excitation transformer end to be checked

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These ground pads have to be provided by the respective equipment supplier . They are not supplied by the busduct vendor

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insulated feet to be provided for supporting the enclosure on steel structure





4. Outdoor Structure member

Moment connections shall be used to provide rigid structures. The use of angle members for bracing will not be acceptable.

5. Indoor Support Structure

All indoor bus duct supporting members shall be designed for support from the Purchaser's building steel or from concrete floors. All bolts, nuts, washers, gaskets, or other attachment material needed to attach the supporting members to the building steel shall be furnished by the Supplier.

6. All supporting members and hardware shall be designed to limit the transmission of bus duct and supporting member weight forces to equipment. All supports shall be designed to carry the weight of the bus duct during assembly before the welded joints can carry the load.

7. Hot Dipped Galvanized All supports and fittings for steel fabrication shall be hot-dip galvanized after fabrication. Galvanizing thickness shall not be less than 610 g/m2. Any support steels shapes, such as tubing, that can trap moisture shall not be used. All hardware shall be of high strength steel grade 5.6 with weather resistant finish.

8. Design Calculation Design of supporting structures shall be subject to acceptance by the Purchaser. Point loads transmitted to the Purchaser's steel and foundations shall be furnished on bus duct drawings submitted for acceptance. Design calculation supporting structure design shall be furnished to purchaser for approval. Factor of safety shall be 2.0. The design calculation is subject to purchaser’s structural engineer’s review and bidder shall meet all requirements to meet the approval.

9. Support design i. All bus ducts shall be adequately supported and braced to successfully withstand normal operation, vibration, thermal expansion, short circuit forces, seismic forces and all specified design loads. The support structure shall also be designed to take care of cable tray load of 200kg/meter (if required)

ii. Supports shall be designed to provide tolerance of 12mm (1/2”) in the horizontal and vertical directions.

iii. Arrangement of support steel work shall be such as to prevent heating of structures caused by circulating currents.

10. Inspection cover earthing

Hinges of all inspection covers shall be strapped across with flexible earth connections.

3.3.8 Hot Air Blowing Device 1. Type Portable trolley mounted with rolling wheel, can be easily

pulled to different location in the plant.

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The maximum loading of cable trays is always limited to 100 Kg / running meter

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2. Use For drying IPBD, SPBD after shutdown or overhaul. 3. Blower Ambient air shall be drawn through a washable filter and

pass through thermostatically controlled heater through canvas hose to the busduct & released through opening on the busduct at the other end

4. Sizing The blower & heater shall be sized to dry the whole assembly of busduct in a hours time. Bidder shall submit necessary supporting for purchaser’s approval.

5. Accessories In addition to blower, filter, heater, thermostat other accessories to be supplied are control panel, piping, valves, safety switches, instrumentation, monitoring, canvas pipe connecting to busduct of sufficient length, cable reel etc.

3.3.9 Air Pressurization Unit 1. Purpose To keep the bus duct pressurized & dry in order to avoid

dust & moisture ingress. 2. Construction All equipment shall be mounted on a skid (fabricated out of

steel structure) such that whole unit can be transported as a single block & placed at site.

3. Pressure in side Busduct

½ in of water pressure above atmospheric pressure by clean dry air. The bidder shall guarantee and demonstrate at site the air leakage rate of not more than 5% of total enclosure volume per hour after installation.

4. Scheme The station compressed air shall be used as normal source of air for pressurization. The air shall be dried using one working & one standby (2x100%) regenerative type heater less drier. As a standby to the station air a oil free compressor shall be used. The necessary interlocks shall be provided for start of the compressor only when there is loss in station compressed air. The station compressed air will be supplied at 8 bars and the required reducer with instruments and valves shall be furnished by the bidder.

5. Instrumentation Instrumentation shall be provided to monitor airflow and pressure. Alarms shall be provided when airflow or pressure is outside design conditions. Necessary volt free contacts shall be furnished for alarm to DCS.

6. Each generator bus-duct (IPBD) shall be provided with an air pressurization system consisting of one air compressor with necessary filters, driers, piping, valves, drains, pressure switch / gauges, fittings and necessary controls to ensure a continuous supply of clean, dry, pressurized instrument air supply to the bus duct enclosure to prevent any ingress of moisture from atmospheric air. Compressor shall be oil free type. All tubing shall be of copper.

7. Noise Level The equipment shall be selected with low noise, noise shall no case shall exceed 85 dBA at 1 mtr from equipment.

8. A pressure reducing station, including orifices, valves,

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Positive air pressure of 100 mm of water column has to be maintained inside the enclosure to prevent ingress of moisture from atmospheric air





manometer, and filters shall be furnished to monitor and maintain the compressed air within the pressure limits of the bus duct enclosures. The bus duct enclosures shall have provisions to prevent equipment damage in the event the regulation device fails, exposing the duct directly to the plant compressed air supply.

9. Scheme Flow Diagram A tee-off connection with a non-return and isolating valve and pressure reducer shall be provided for a connection to plant compressed air supply header. Typical scheme to be followed for air pressurization system is attached in Annexure-F

10. Pipe connection One connection point for air supply and metering and one connection point for pressure monitoring shall be furnished in each phase bus enclosure. The indoor air supply and metering connection point on each phase bus enclosure shall be on a horizontal bus run as close as possible to the generator connection seal-off bushing. All air supply and metering connection points shall be at the top of the enclosure. The location of all connection points shall be reviewed by the Purchaser. All connection points shall be 1/2 inch NPT (16 mm with metric thread), coupling type, and shall be plugged for shipping.

11. Local Control Panel One feeder of required capacity shall be made available at each control panel which shall house starters and control systems for blowers, heater, solenoid valves etc. The control panel shall be with IP-52 enclosure protection

12. Bid detail The Bidder shall furnish the following details clearly in his bid:

a) Parameters of clean air b) Requirement of air in m3/hr at NTP. c) Scheme/ method to calculate the leakage rate.

3.3.10 Space heater, Illumination

1. Provision To be provided in each panel & cubicle 2. Type Panel Space Heater – Non exposed type, thermostat

controlled to maintain above dew point. Illumination – Fluorescent tube light with door switch control Power socket – 5 Pin Space heater shall be sized to maintain temperature above dew point.

3. Mounting Space heater mounting will be on insulator

3.3.11 Control Panel 1. Type CRCA fabricated 2. Sheet Thickness Minimum 2 mm





3. Enclosure IP 52 , indoor 4. Indicating Lamps LED cluster type 22 mm 5. wiring Copper stranded minimum 2.5 sq mm, 650V, PVC/XLPE

insulated 6. Gland plate Detachable undrilled 7. Space heating, panel

illumination To be provided

3.3.12 Current Transformer 1. Applicable standard IEC 60044 2. Type Cast- resin 3. Thermal rating 120% of rated current 4. Location Mounted within the bus enclosure such that same shall be

in pressurized zone. 5. Ambient Condition The current transformers shall be suitable for operation at

an ambient temperature existing within the bus duct enclosure. Mounting arrangement of CT shall be so designed so as to avoid equalizing connections between live conductor and CT inner surface.

6. Service Access The bus design shall permit removal or replacement of CTs without dismantling the bus run or supports. CT removal facility should be through a disconnect link or terminal flexible links shall be provided in the adaptor chamber.

7. Ratio & Accuracy Class As per technical parameter 8. Secondary connection &

MB The CTs shall have polarity markings indelibly marked on them .The CT secondary leads shall be brought out through non-magnetic metallic conduits to a marshalling box (MB) with degree of protection IP-55 (IS: 13947 Pt.1). Heat resistant type wires suitable to withstand specified bus duct inside temp shall be used for wiring between CT secondary terminals to the terminal box. The MB shall be provided with removable aluminium gland plate. The facility for shorting and grounding shall be provided at the terminal blocks. In addition to above the marshalling box having termination of line side CTs, the transducers shall be provided to facilitate interface of generator bus duct CTs/PTs with DCS. Accordingly the interconnection from VT panels to this marshalling box shall also be provided. This marshalling box housing transducers shall be located near PT & SP Cubicle

3.3.13 Wiring

1. All wiring shall be done with 650V grade PVC insulated FRLS type stranded copper conductor of not less than 1.5 Sq.mm cross section with suitable lugs (insulated sleeves) on both sides. Each wire shall be identified at both ends with plastic ferrule with wire designation as per approved wiring diagrams. For CT wiring 4 sq. mm copper wire shall be used.





2. Control terminal blocks shall be box-clamp type suitable for 2x2.5 Sq.mm copper conductor with marking strips.

3. Not more than two wires shall be connected to one terminal. Spare terminals equal in number to 20% active terminals shall be furnished.

4. CT terminals shall be stud type and suitable for round type lugs with facility for isolation, shorting and grounding. PT terminals also shall be stud type.

3.3.14 Painting 1. All Surfaces Shall be as per Annexure-F (specification on painting)

3.3.15 Nameplate

1. Material for name plate Engraved in Aluminium/Stainless Steel plate, 1 mm thick, Using black letters

2. Text and Size a) Manufacturer’s name, serial number. b) Month and year of manufacturer. c) Rated voltage, current and frequency. d) Type of cooling e) Rated insulation levels

1) Power frequency withstand voltage. 2) Lighting impulse withstand voltage.

f) Rated short time withstand current. g) Rated momentary withstand current (Ka rms asym). h) Rated momentary withstand current (Ka peak). i) Transport weight. j) Name of the Purchaser. k) PO number and date.

Details on the nameplate shall be as per IS 8084

3.3.16 Erection And Commissioning 1. Scope Unloading, transfer, Storage, Positioning, Fabrication,

Erection, Testing & Commissioning, statutory approval if any of all the equipment supplied by bidder. Any other activity not specifically mentioned but required for successful erection & commissioning shall be in bidder’s scope.

2. Erection Sequence, Erection Key Diagram, Procedure &FQP

Bidder shall furnish Document detailing unloading methodology, storage methods/precaution, Erection Procedure, Erection Key Diagram, time schedule, Checklists, FQPs for Purchaser’s approval

3. Erection Tools Bidder shall furnish the required tools for erection & commissioning, as a minimum it shall include Electric Driven Tool ( Drilling machines, screw driving machines), Welding equipment including welding gas ( excluded welding wire), Hoists, Measuring and marking devices,





Open ended spanners: M10-M36, Ring Spanners: M10-M36, Ratchet Wrenches: M10-M36, Torque Wrench (range 30-110 N/m), Test equipments, Welding equipment including welding gas ( excluded welding wire), Any other tools as necessary shall be furnished by the bidder

4. Consumables Consumables as necessary shall be furnished by the bidder. As a minimum it shall include Lubricants, Contact Grease, Primer coat of dull black finish ( for repaint), Final Coat according to colour as specified elsewhere in this specification ( for repaint), Welding wire for Al and Fe welding, Shim plates for insulator support (20 pcs), Aluminium sheets (for test welding at site, identified in packing list), Shim plates, The glue for small repairs, 0.5 m of enclosure and conductor (for adaptation purpose if needed). Cleaning accessories, Adhesive label, Zn coat (for repair/repaint) etc. Any other consumables as necessary for completing the erection & commissioning shall be furnished by the bidder.

5. Testing Kits Bidder shall furnish all the testing and commissioning test kits as required that include, micro ohm meter, HV test kit etc.

3.4 Packing

1. Shipping Length Maximum shipping length should not exceed 6000mm 2. Packing Protection i. Protection shall be provided against corrosion, dampness,

Heavy rains, breakage and vibration. ii. Ends of the sections shall be closed with wood or

hardboard 3. Packing Identification

label on each case with details as listed

i. Identification number ii. Buyer’s name iii. PO number (along with SAP item code, if any) & date iv. Equipment Tag no. (if any) v. Destination vi. Manufacturer / Supplier’s name vii. Address of Manufacturer / Supplier / it’s agent viii. Description and Quantity ix. Country of origin x. Month & year of Manufacturing xi. Case measurements xii. Gross and net weights in kilograms xiii. All necessary slinging and stacking instructions

4. Improper packing The seller shall be responsible for all transit damage due to improper packing





3.5 Inspection & Testing

3.5.1 General 1. Comprehensive Test Plan Shall be furnished by bidder for purchaser’s approval 2. Advance Notice Two weeks advance notice shall be given to the

purchaser. 3. Customer Hold Point Purchaser will identify CHP on test plan, Bidder shall

proceed only after such tests are witnessed and approved by purchaser.

4. Test Facility Bidder shall furnish all test Lab facility and there accreditation with the bid.

5. Cost of the tests The cost for all routine tests shall be included in the basic price of materials. Bidder shall furnish optional price for conducting type test for purchaser to take a decision at a later date if purchaser intends to carry out / repeat the type tests.

i. Bidder shall submit type test reports on similar rating of busduct conducted not earlier than last five years along with the offer.

ii. All equipments to be supplied shall be type tested ones.

iii. Bidder shall furnish optional price for conducting type test on the Busduct, LAPT & NGT Panel in the price offer.

iv. In the event of order the contractor shall furnish type test reports of all equipments in his scope for purchaser’s review. In case bidder is not able to produce type test certificates, the bidder must change the equipment make/type else carry out type test at his own cost/delivery implication.

6. Type Test Reports

v. Certified test reports in requisite sets shall be furnished to purchaser for their review & acceptance. Dispatch of material is permitted on written clearance of purchaser.

i. Routine & Acceptance test shall be performed on all equipment, bought out equipment, finished products in line with relevant standards.

7. Routine Test Reports

ii. Routine Tests shall be performed in presence of purchaser’s representative if so desired by the purchaser. The bidder shall give at least seven (7) days advance notice of the date when the tests are to be carried out.





3.5.2 Type Test i. Temperature rise test on one section of main run,

delta run and tap-off run. Test assembly and criterion should be as per CBIP manual on busduct publication no. 303 and as per IEEE C37.23-2003.

ii. Impulse voltage withstand on a typical section of main run, delta run and tap-off run as per IEEE C37.23-2003 / IS 8084.

iii. One minute high voltage power frequency withstand test on a typical section of main run, delta run and tap-off run as per IEEE C37.23-2003 / IS 8084.

iv. Momentary withstand current test (as per IEEE C37.23-2003) on representative sections of 3-phase bus ducts in main run, delta run and tap-off run, each including one bend. The sections having longest span between support insulators shall be chosen.

v. Short time withstand current tests on one section of main run, delta run and tap-off run, each including one bend as per IS-8084 & IEEE C37.23-2003. The sections having longest span between support insulators shall be chosen.

1. Type Tests on Busducts

vi. Test for Radio Interference on the busduct (as per NEMA107-Method of measurement of Radio influence voltage of High Voltage Apparatus). The set up shall include one flexible connection and “L” of substantial length. The maximum RIV shall not exceed 100 micro volts at 1000 kHz

i. Visible discharge test As per IS:2544 ii. Impulse voltage withstand test As per IS:2544 iii. Dry power-frequency voltage withstand test As per

IS:2544 iv. Temperature cycle test As per IS:2544 v. Test for mechanical strength As per IS:2544 vi. Puncture test (for insulators Type B only) As per IS

2544 vii. Porosity test As per IS:2544 viii. Galvanizing test As per IS:2544

2. Type Test on Insulators / Seal off Bushings

ix. Thermal stability test As per IS:2099 i. Thermal short time current withstand test As per

IS:2099 ii. Dynamic current withstand test As per IS:2099 iii. Cantilever load withstand test As per IS:2099

3.

iv. Temperature rise test As per IS:2099





4. Type Test on Enclosure Water Tightness Test (to check the degree of protection) as per IEEE C37.23-2003 / IS 8084.

5. For the equipments and materials such as current transformers, voltage transformers, lightning arresters, grounding transformers, loading resistors, isolators, bushings etc. for which type tests are not specified in this section, successful type test certificates shall be submitted to the Purchaser for their approval.

3.5.3 Routine And Acceptance Test 1. Routine Test on Busduct All routine test as per IS-8084, IEC-60694 & IEEE

C37.023 2. Routine Test on Insulator All routine Test as per IS-2544 3. Routine Test on Current

Transformer All routine test as per IS-2705 & IEC-60044

i. Uniformity in thickness as per IS 2633 ii. Mass of zinc coating as per IS 6745 4. Routine test on structures

(Galvanization test) iii. Freedom from defect and adhesion test as per IS 2629

3.5.4 Site Acceptance Test 1. The tests indicated herein are indicative only. Bidder shall furnish the site FQP

indicating all the tests to be conducted on equipment supplied and installed for purchaser’s approval. The site test plan shall be in line with relevant standards, and best of industry practices.

2. One minute high voltage power frequency withstand test after installation. 3. Insulation measurement test at site after installation before and after HV test. 4. Air leakage test and water tightness test of bus duct system after installation at site. 5. Mill volt drop test at site after installation. 6. 10% radiography and 100% DP test on all site welded joints of busbar and

enclosure. 7. Ratio and polarity tests on current and voltage transformers.

3.6 General Requirements

3.6.1 Proposal Data 1. The proposal data sheets (Schedule A –K) annexed to this specification shall be typed

in without ambiguity 2. These pages must be signed by the authorised representative of the Bidder as

verification of the data and submitted along with the bid to form part of the Bidder’s formal proposal

3.6.2 Drawings & Annexure 1. All drawings and annexures appended to this specification shall form a part of this

specification and supplement the requirements specified herein 2. This specification shall be read and construed in conjunction with the drawings and





annexures to determine the scope of work and terminal points 3. The quantities shown on drawings and annexures are tentative for bidding purpose

only. Any variation arising during detailed engineering stage will be taken into account for adjustment of contract price based on unit rates quoted in Schedule C of the bid.

3.6.3 Completeness of supply 1. It is not the intent to specify completely herein all details of the equipment.

Nevertheless, the equipment shall be complete and operative in all aspects and shall conform to highest standard of engineering, design & workmanship.

2. Any material or accessory which may not have been specifically mentioned but which is necessary or usual for satisfactory and trouble-free operation and maintenance of the equipment shall be furnished without any extra charge.

3. The Contractor shall supply all brand new equipment and accessories as specified herein with such modification and alteration as agreed upon in writing after mutual discussion

3.6.4 Guaranteed Performance & Liquidated Damages 1. The performance figures quoted in Schedule B shall be guaranteed within the

tolerance permitted by relevant standards. 2. The losses shall be computed as per ANSI 37.023 at specified rated conditions to

establish the performance as indicated in the Specification. 3. Should the supplier fail to meet the guaranteed parameter, the liquidated damages at

the rate specified under would be charged to the bidder. However if the actual losses exceed the guaranteed figures more than 3% of guaranteed value, the equipment is liable for rejection by the purchaser.

4. Generator bus duct Losses shall be calculated as per ANSI 37.023 at rated current & maximum operating temperature. Losses provided in technical particulars shall be guaranteed without any positive tolerance. Bus duct losses shall be taken into account while bid evaluation. Loss capitalization rate: Rs *******/- per kW loss Liquidated Damages rate: Rs *******/- per kW loss

3.6.5 Deviation 1. Should the Bidder wish to deviate from this specification in any way, it shall be

clearly mentioned in Schedule I with reference to the respective clause of the specification.

2. Unless such deviations are recorded in deviation sheet and submitted with the offer, it will be taken for granted that the offer is made in conformity with this specification in all respects.

3.6.6 Training 1. The training shall be imparted by a senior trainer. 2. Training module to include details of equipment, their periodic, preventive

maintenance and trouble-shooting.





3.6.7 Drawing Approval 1. Before starting manufacture of any equipment, the contractor shall have to take

approval of the relevant drawings, data sheet and Quality Assurance Plan from Purchaser in writing.

2. Any manufacture done prior to the approval of drawings / data shall be rectified in accordance with the approved drawings / data by the Contractor at his own cost and the equipment shall be supplied within the stipulated period.

3.6.8 Documentation The bidder may note that the drawings, data and manuals listed herein are minimum requirement only. The bidder shall ensure that all other necessary write-up, information, etc required to fully describe the instrument are to be submitted.

Document to be submitted With

the Bid

For approval

after award

1. List of Deliverables with schedule Y Y

2. Technical Particular and Data Sheet Y Y

3. General Arrangement & Dimensional Drawing of

Busduct (Main Run, Tap-Off)

Y Y

4. General Layout Drawing – Plan and Sections. Y

5. Typical details of bus-insulator assembly, conductor/enclosure connections rigid & flexible, seal-off bushings, Wall Frame Assembly, Adaptor etc.

Y Y

6. Bill of Materials. Y

7. Calculation for temperature rise for bus and enclosure as per IEEE No. 298.

Y

8. Calculation for short circuit forces justifying the proposed arrangement

Y

9. Supporting steel structure and calculations including Design Output

Y

10. Calculation for Conductor, Enclosure and Total Losses Y

11. Calculation for number of expansion bellows & flexible Y

12. Pressure drop calculation for the closed air system Y

13. General Arrangement Drawing of Air Pressurization Unit along with calculations for sizing of system components such as compressor, etc.

Y

14. Flow Diagram of Pressurization system & Hot air blowing Y Y

15. Type Test Certificate of similar rated IPB Y Y

16. All the Schedules duly filled Y

17. Unprized Price schedules Y





18. Quality Assurance Plan Y Y

19. Technical leaflets/Write-ups on various pieces of equipment offered

Y Y

20. Dimensional drawings for terminal connectors etc. Y

21. Detailed material list with parts number. Y

22. Wiring Diagrams Y

23. C.T. excitation curves. Y

24. Erection Key Diagram Y

25. Instruction manual for Bus Duct and associated equipment.

Y

26. Foundation plan & loading data Y

27. Rating and Diagram Plate Y

28. CT ratio correction factor and excitation curve with internal resistance

Y

29. Recommended erection sequence in detail Y

30. O & M Manual & As built Drawings Y

31. Sizing calculations for main run, tap off and delta run i. Conductor size

ii. Guaranteed KW losses in conductor and enclosure

iii. Short circuit withstand The temperature rise due to solar radiation shall be taken consideration of in the calculation.

Y





3.7 ANNEXURES

3.7.1 Annexure A: Bill of Quantity Attached with the specification (sample)

3.7.2 Annexure B: Single Line Diagram for IPB/ LAPT/NGT Attach interconnection diagram of all equipment connected with IPBD.

3.7.3 Annexure C: Mandatory Spares Attached with the specification (sample)

3.7.4 Annexure D: Quality Assurance Requirement Insert the latest revision of Quality Assurance Requirement standard

3.7.5 Annexure E: IPBD LAYOUT Insert the latest revision of transformer yard layout

3.7.6 Annexure F: Specification on painting Attached with the specification

3.7.7 Annexure G: Air pressurization Scheme Attached with the specification





ANNEXURE – A: Bill of Material

(Sample is being provided)

Bill of materials for bus ducts and supporting structures are given herein for bidding purpose only. The contract/final payment shall however be made based on the “approved drawings” upon finalization of detail engineering. The unit price for addition/deletion quoted in Schedule- will be applicable for deriving the final contract price. The straight lengths indicated in bill of material are measured along the centrelines of the busduct including the lengths for bends, tee of connection, terminal adaptors etc.

Qty Sl.

No Description

One Unit All Units

1. Straight run (Single phase quantity)

i. Main Run (rating as per project) metres metres

ii. Delta Connection (rating as per project) metres metres

iii. Tap-off to UAT/ Static Excitation Trafo/ VT, SP Cubicle (rating) metres metres

iv. Tap-off Common run (rating) metres metres

v. Neutral Busduct (rating) metres metres

1. Wall Frame Assembly without seal-off bushing (quantity for 3-phases of busduct) Sets Sets

2. Segregated-phase terminal adapter Box (3phase) for generator phase side complete with seal off bushing, interphase barrier, rubber bellow, nuts, bolts, washers etc.

Nos Nos

3. Expansion bellow (Metallic) – 1 phase sets

i. Main run rating as per project Sets Sets

ii. Delta run rating as per project Sets Sets

iii. Tap-off rating as per project Sets Sets

4. Supporting Steel structure (Hot-dip galvanized) with nuts, bolts, anchors, bracing, shims, other hardware & accessories

MT MT

5. Flexible Terminal Connector (Single Phase sets) at

i. Generator end copper flexibles (rating as per Sets Sets





Qty Sl. No

Description

One Unit All Units

project)

ii. Generator Circuit Breaker end aluminium flexibles (rating as per project, if applicable) Sets Sets

iii. Generator Transformer end copper flexibles (rating as per project) Sets Sets

iv. Unit Transformer end copper flexibles (rating as per project) Sets Sets

v. V.T. & SP Cubicle end aluminium flexible (rating as per project) Sets Sets

vi. Static Excitation Transformer end copper flexibles (rating as per project) Sets Sets

vii. NGT Panel end (rating as per project) Sets Sets

viii. Generator neutral side (rating as per project) Sets Sets

ix. Straight Run-outdoor aluminium flexibles (rating as per project) Sets Sets

6. Tee-of connection for Tap off bus (1 phase sets)

i. Main run-delta run (rating as per project) Sets Sets

ii. Main run- Common tap-off run (rating as per project) Sets Sets

iii. Common tap off run- Tap-off run (rating as per project) Sets Sets

7. 90 degree Bends for conductor and enclosure, horizontal (1 phase sets)




8. 90 degree Bend for conductor and enclosure, vertical (1 phase sets)








Qty Sl. No

Description

One Unit All Units

9. Bolted Disconnect Link (1 phase-Rigid)

i. Main run rating as per project Nos. Nos.

ii. Delta run rating as per project Nos. Nos.

iii. Tap-off rating as per project Nos. Nos.

iv. Neutral rating as per project Nos. Nos.

10. Termination including expansion bellows, adaptor box, flanges, bolts, hardware, gaskets, accessories, canopy (1-phase sets)

i. GCB Termination – if applicable Sets Sets

ii. GT Sets Sets

iii. UT Sets Sets

iv. LAPT Sets Sets

v. Neutral Duct (Generator Side) Sets Sets

vi. NGT (NGT Panel Side) Sets Sets

vii. Static Excitation Transformer (if Applicable) Sets Sets

11. Current Transformer in tap-off (with TB) – 1 phase

i. Overall Differential (UT tap-off) – Core1 Nos. Nos.

ii. UT Over current (UT tap-off) - Core 2 Nos. Nos.

iii. UT Differential (UT tap-off) – Core 3 Nos. Nos.

12. Miscellaneous Materials like space heater, breathers, drains, cocks, end shorting plates etc.

Lot Lot

13. Air pressurization unit complete with accessories described in technical section. 1 Set Sets

14. Hot Air Blowing trolley with all accessories as described in the specification 1 1

15. LAPT Panel with VT, LA & other accessories as per specification (if Applicable) Sets Sets





Qty Sl. No

Description

One Unit All Units

16. NGT Panel with NGT, Resistor, CTs, Isolator & other accessories as per specification (if Applicable) Sets Sets

17. Any other equipment, which are not mentioned above, required for completeness of the system

Lot Lot





ANNEXURE – C List Of Mandatory Spares

(Sample)

Units of measurement Qty for All units

1. Bus support insulator Nos.

2. Flexible equipment terminal Connector complete with Hardware for

i. Generator (1-phase sets) Sets

ii. Generator Circuit Breaker (1-phase sets) Sets

iii. Generator Transformer (1-phase sets) Sets

iv. Unit Transformer (1-phase sets) Sets

v. PT & SP Cubicle Tap off (1-phase sets) Sets

vi. Static Excitation Transformer (1-phase sets) Sets 3. Current Transformer – Tap off

i. Overall Differential 23000/5 A -core1 Nos.

ii. UAT Differential 1400/1 A - core 2 Nos.

iii. UAT over current 1400/1 A - core 3 Nos. 4. Seal off bushing at

i. Generator terminal end Nos.

ii. LAPT end Nos.

5. Expansion Bellows of each type and rating (1-phase sets) Sets

6. Voltage transformers of each type and rating - (3 Nos VTs in each LAVT panel) Sets

7. Lightning Arrestor of each type and rating - (3 Nos LAs in each LAVT panel) Sets

8. VT primary fuse of each type and rating Nos.

9. VT secondary MCBs/fuse of each type and rating Nos.

* - Set means complete requirement for (1) one phase.





ANNEXURE – F Specification For Painting

(Attach)





Annexure-G Air pressurization Scheme





PART III

SECTION 1 ERECTION CONDITIONS OF CONTRACT (ECC)

(Insert the erection conditions of the contract)

SECTION 2 ENCLOSURES

(Insert the enclosures)

SECTION 3 FQP (FIELD QUALITY PLAN) (Insert the field quality plan)




Document Number : REL-COENG-NEE-E21-P-00018 PART IV DATA TO BE SUBMITTED BY THE BIDDER Sheet 41

PART IV DATA TO BE SUBMITTED BY THE BIDDER

SECTION 1 TECHNICAL DATA SHEETS (Bidder shall submit the data sheet in the format of schedule B)

SECTION 2 SCHEDULES 1. Schedule-A: Key Information

Attach the Standard file

2. Schedule-B: Data Sheet

Attach the file, as provided with the specification

3. Schedule C: Price Schedule


4. Schedule D: Engineering, Delivery & Commissioning Schedule


5. Schedule E: Price break up of Erection & Commissioning Spares


6. Schedule F: Price break up of Mandatory Spares


7. Schedule G: Price break up of Recommended Spares


8. Schedule H: Maintenance Tools & Tackles


9. Schedule I: Technical Deviations


10. Schedule J: Experience List


11. Schedule K: Technical Evaluation


SECTION 3 TENDER DRAWINGS





SCHEDULE–A KEY INFORMATION OF BIDDER

1.0 Bidder’s Name and Address

2.0 Details of the responsible officer, to whom all correspondences regarding this proposal shall be made

2.1 Name

2.2 Designation

2.3 Address

2.4 Telephone No

2.5 Fax No

2.6 E-mail address

3.0 Indian Agent, if any:

3.1 Name

3.2 Address

3.3 Responsible officer

3.3.1 Name

3.3.2 Address

3.3.3 Telephone No.

3.3.4 Fax No.

3.3.5 E-mail address

4.0 Proposal Number & Date

5.0 Validity of offer, counted from the date of bid-opening

6.0 The proposal is complete covering all the intents of the specification

(Yes/No)





7.0 Are the quoted total and unit break-up prices firm?

(Yes/No)

8.0 Whether bidder has acquainted himself with the site conditions including railway and road approach

(Yes/No)

9.0 Guarantee period from the date of issuance of ‘Notice-to-Proceed’

10.0 Requirement of construction power (phase-wise details to be furnished for the contract execution)

11.0 Requirement of construction water (phase-wise details to be furnished for the contract execution)

12.0 Requirement of space:

12.1 Storage space

12.1.1 Covered

12.1.2 Semi-open

12.1.3 Open

12.2 Space for fabrication yard

12.3 Space for construction site offices

Stamp / seal of bidder - ……………………………….

Name of Vendors contact person

Email id -

Telephone no -

Address of the office





SCHEDULE – B GUARRANTEED TECHNICAL PARTICULARS TO BE SUBMITTED BY BIDDER

Instruction to bidders – 1) Bidder to fill up only column (B) and shall not change description in column (A) 2) Bidder to submit GTP with data in numerical values wherever asked. 3) Bidder shall not use words like – ‘Adequate’, ‘As per standard’, ‘Later’, ‘After award’ etc. This will be considered as deviation.

1. ISOLATED PHASE BUS DUCT

1.1 Make

:

1.2 Type

:

1.3 Reference Standard

:

1.4 Rated Maximum Voltage

:

1.5 Cooling (Self cooled) Yes/No

:

1.6 Frequency (Hz)

:

1.7 Insulation Level

a. 1 min. Hipot (KV rms)

:

b. Basic Impulse (KV peak)

:

1.8 Rated Continuous Current at site operating condition (considering solar radiation effect)

a. Main run (Amp)

:

b. Delta run (Amp) c. Tap-off run (Amp)

:

d. Tap-off run common run (Amp)

:

e. Neutral Run : 1.9 Maximum temperature rise over

50oC ambient

a. Bus Conductor (°C)

:





b. Bus Enclosure (°C)

:

All joints are silver plated (Yes/No) : Silver Coating Thickness/Length :

1.10 Rated Short Time Current Symmetrical KA rms for 1 sec

Momentary KA peak

a. Main run

:

b. Delta run : c. Tap-off run

:

1.11 Weight per metre run of Isolated Bus Duct

a. Main run (kg)

:

b. Delta run (kg) : c. Tap-off run (kg)

:

d. Tap-off run common (kg)

:

e. Neutral Run : 1.12 Shipping Data

a. Weight of heaviest (Kg)

:

b. Dimension of largest package (L x B x H)mm

:

c. Standard bus section length : 1.13 Material with Grade

a. Conductor

:

b. Enclosure

:

c. Bus Insulator : d. Insulator (enclosure with steel

structure) :

e. Flexible Conductor : f. Expansion Bellows (metallic) : g. Expansion Bellows

(equipment terminal end) :

h. Support Structure : i. Hardware-Conductor Joint : j. Hardware-Equipment

Terminal :

k. Phase Barrier (Generator Adaptor)

:

l. Hardware-Support Structure :





1.14 Conductivity

a. Conductor

:

b. Enclosure

:

1.15 Conductor Shape

a. Main Bus

:

b. Delta Run : c. Tap-off Bus

:

d. Tap-off Bus common

:

e. Neutral run : 1.16 Conductor Size

a. Main Bus

:


:


:

e. Neutral run : 1.17 Enclosure Data Phase

spacing (mm)

Outside diameter

(mm)

Thickness (mm)

a. Main Bus

:


:


:

e. Neutral run : 1.18 D.C. Resistance at 20oC in micro

Ohm/metre/phase

Conductor Enclosure

a. Main Bus

:


:


:

e. Neutral run : 1.19 Skin-effect Ratio





a. Main Bus

:


:


:

e. Neutral run : 1.20 50 Cycle Reactance in

Ohm/metre/phase

a. Main Bus

:


:


:

e. Neutral run : 1.21 3 phase Capacitance to Ground in

Microfarad/metre/phase

a. Main Bus

:


:


:

1.22 Losses in Watt/metre/phase

Conductor Enclosure

a. Main Bus

:


:


:

1.23 Enclosure Finish

Outside

:

Inside

:

1.24 Phase to earth clearance provided (mm)

:

1.25 Bus Insulator

a. Make

:





b. Type

:

c. Reference Standard

:

d. Number per support

:

e. Voltage class (KV)

:

f. Creepage distance (mm)

:

g. Compression strength (Kg)

:

h. Cantilever strength (Kg)

:

1.26 Supporting Steel Structure

Complete supporting steel structure furnished (yes/No)

:

Hot-dip Galvanized (Yes/No)

:

Galvanizing thickness

Insulated from Enclosure (yes/No) 1.27 Grounding

a. Material and size of ground bus separately

:

1.28 Generator Terminal Phase Side Adaptor Box

a. Material of enclosure

:

b. Thickness of enclosure mm

:

c. Material of Interphase barrier

:

d. Thickness of interphase Barrier

:

1.29 Seal-off Bushings

a. Make

:

b. Type

:

c. Reference Standard

:

d. Rated Voltage (KV)

:





e. 1 minute power frequency withstand voltage

i. Dry (kV)

:

f. Impulse withstand (KVp)

:

g. Creepage distance (mm)

:

h. Weight of each bushing

:

1.30 Catalogue enclosed for various pieces of equipment (Yes/No)

:

1.31 Describe arrangement that provides “minimum flux” design of bus

:

1.32 Indicate recommended protection for Owner’s structural steel/ reinforcing steel, if any

:

1.33 Details of arrangement offered for preventing moisture into busduct deteriorating insulator properties during unit shutdown.

:

1.34 Details of disconnecting link

:

2. CURRENT TRANSFORMER

2.1 Make

:

2.2 Type

:

2.3 Voltage Class

:

2.4 Rated frequency

:

2.5 Type of Insulation

:

2.6 Temperature rise at rated current over 105`C ambient

:

2.7 Short Time Rating

a. Symmetrical KA for 1 sec

:

b. Momentary KA peak

:

2.8 BIL FOR CTs :

3. HOT AIR BLOWING UNIT





3.1 Fans

a. Make

:

b. Type

:

c. Capacity (m3/Hr)

:

d. Head at rated speed

i. Static(mm of W.C)

:

ii. Total (mm of W.C)

:

e. Nos. furnished per set

:

3.2 Motor

a. Make

:

b. Type

:

c. Ratings Output

:

d. Voltage, Phase, Frequency

:

e. Insulation class

:

f. Enclosure

:

g. Nos. furnished per set

:

3.3 Filter Set

a. Make

:

b. Type

:

c. Size

:

d. Nos. furnished per set

:

3.4 Heater

a. Make

:

b. Type

:

c. Voltage, Phase, Frequency

:






:

3.5 Thermostat

a. Make

:

b. Type

:

c. Model No.

:


:

3.6 Duct work furnished with all connections & accessories (Yes/No)

:

4. PRESSURISATION UNIT 100% redundant system considered (yes/no)

:

4.1 Air compressor

a. Make

:

b. Type

:

c. Capacity

:

d. Pressure (operating range)

:

e. Nos. furnished per set

:

4.2 Filters

a. Make

:

b. Type

:

c. Size

:


:

4.3 Motor

a. Make

:

b. Type

:

c. Ratings Output

:

d. Voltage, Phase, Frequency (variations)

:

e. Insulation class

:





f. Enclosure (IP-55)

:

g. Nos. furnished per set :

h. Insulation class/Temp rise

:

i. Suitable for bi-directional rotation (yes/no)

:

j. Cooling (TEFC)

:

k. Meets the specification on sheet

:

4.4 Driers

a. Make

:

b. Type

:

c. Size

:


:

e. Inlet flow rate

:

f. Inlet air pressure

:

g. Outlet flow rate/pressure

:

h. Outlet air dew point

:

i. Cycle Time

:

j. Absorption Time

:

k. Regeneration Time

:

l. Heating Time

:

m. Cooling Time

:

4.5 Pressure switch

a. Make

:

b. Type

:

c. Range

:


:

4.6 Tee off connection with non-return :





valve provided for connection to station compressed air system (Yes/No)

4.7 Total volumetric capacity of busduct installation

:

4.8 Maximum air leakage for complete installation (m3/hr) (guaranteed)

:

4.9 Pressure inside enclosure (gauge)

:

4.10 Safety valve setting

:

4.11 Safety valve capacity

:

4.12 Number of safety valve

:

4.13 Designed gauge pressure

:

4.14 No. of expansion bellows – Straight run?

:

4.15 Control Panel:

a. Type

:

b. Make

:

c. CRCA Sheet thickness

:

d. Mounting

:

e. Enclosure Protection

:

f. Controls provided-describe

:

g. Indications Provided-describe

:

h. Annunciations provided-describe

:

i. Starter Type –

:

j. Type-2 co-ordination for DOL starter

:

k. Switchgear Make –

:

l. Indicating meters –

:

4.16 Enclosure Protection







Email id -

Telephone no -


a. IPB – Indoor : b. IPB – Outdoor

:

4.17 Canopy (Rain Hood) Provided over all joints outdoor (Yes/No)

:

4.18 All schedules are furnished duly signed by the bidder (Yes/No)

4.19 All the technical data/Drawing/Product Literature furnished as asked in the NIT (yes/No)





SCHEDULE –C: PRICE TABULATION SHEET

1. Bidder’s Information

1.1 Name

1.2 Address

2. Bidder's Proposal Number

3. Bidder's Proposal Date

4. Bidder's proposal validity period

5. Bidder's quoted price for the supply of all equipment as specified and as listed in Annexure A, Bill of material, properly packed for transportation f.o.r. manufacturer's works Prices to be inclusive of

• All accessories and equipment as specified in the NIT.

• All taxes and duties Prices to be exclusive of

• Transit insurance • Spare parts • Special Tools & Tackle

(Taxes shall be indicated separately along with prevailing rates).

5.1 Bidder’s quoted price for erection & Commissioning of equipments in his scope of supply

Total (5.0 + 5.1)

Rs………………..

6. Bidder's total Charge for –

6.1 Transportation of equipment as specified f.o.r. site

Rs………………..

6.2 Transit Insurance including 60 days storage at site

Rs………………..

7. Bidder's Charges for the Tests Specified for the ratings/dimensions of busducts offered with the bid (specify all tests chargeable)

7.1 Temperature Rise test





A Main run Rs……………….. B Delta Run Rs……………….. C Tap-off Run Rs………………..

7.2 Impulse Voltage Withstand test


7.3 Momentary short circuit withstand current test


7.4 Short time short circuit withstand current test


7.5 Power frequency withstand voltage test


7.6 Air & Water tightness test

8. Bidder's Total Price f.o.r. Site (Items 5 + 6+7)

Rs………………..

9. Bidder's charges for supply of special tools & tackle f.o.r. Site (inclusive of all taxes, duties & transit insurance) listed as per Schedule-H

Rs………………..

10. Bidder's charge for supply of Mandatory spare parts f.o.r. Site (inclusive of all taxes, duties & transit insurance) as per Schedule - E

Rs………………..

11. Bidder's charge for supply of Erection & Commissioning spare parts and consumables f.o.r. Site (inclusive of all taxes, duties & transit insurance) as per Schedule - E

Rs………………..

12. Bidder's charge for supply of Recommended spare parts for 5-years' operation f.o.r. Site (inclusive of all taxes, duties & transit insurance) as per Schedule - F

Rs………………..





13. Bidder's Engineer's per diem charge for supervision of erection, testing and commissioning

Rs………………..

14. Foreign Exchange requirement c.i.f. in equivalent rupees included in the quoted prices

14.1 Total Price (Item - 8)

Rs………………..

14.2 Tools & Spare parts (Item – 9,10,11 & 12)

Rs………………..

15. Import License

15.1 To be provided by Owner?

Rs………………..

15.2 Covered in Bidder’s Own Quota?

Rs………………..

16. Prevailing rates on which quoted f.o.r. price is based

16.1 Ocean freight and Marine Insurance for imported items

Rs………………..

16.2 Customs duty for imported items

Rs………………..

16.3 Exchange Rate

Rs………………..

16.4 Indian Agent's commission

Rs………………..

16.5 Excise Duty

Rs………………..

16.6 Sales Tax

Rs………………..

16.7 Octroi Duty

Rs………………..

16.8 Any other leviable taxes

Rs………………..

17. Are the quoted price

17.1 Firm?

17.2 If not, state

17.3 What is the ceiling?

17.4 Price variation formula with prevailing rates of labour and materials (Add more sheets, if required)

17.5 Inclusive of any rebate?

18. Prices of Items (if any) not included in the above quoted price







Email id -

Telephone no -






SCHEDULE – C/1: PRICE BREAK-DOWN SHEET

Since there may be addition or deletion of items on finalization of the Contract, the Bidder shall quote for break-down prices of items listed as below. The prices shall be firm and f.o.r. site inclusive of all taxes, duties and transit insurance. The busduct length shall be measured centre to centre. Sl. No.

Description

Unit Price for site

1. Main bus run complete with conductor and enclosure as specified (meter)- rating as per project

Rs………………..

2. Tap off bus run complete with conductor and enclosure as specified (meter) - rating as per project

Rs………………..

3. Delta run complete with conductor and enclosure as specified (meter) - rating as per project

Rs………………..

4. Common Tap Off run with Conductor and enclosure as specified (meter) - rating as per project

Rs………………..

5. Neutral run with Conductor and enclosure as specified (meter) - rating as per project

Rs………………..

6. Wall Frame Assembly (1 set)- Main run Rs……………….. 7. Segregated phase terminal adaptor at Generator phase terminal

including flexible conductor, expansion bellow & seal off bushing – (1 set).

Rs………………..

8. Single phase Terminal Connector at Generator Neutral terminals including expansion bellow, flexibles & matching flanges (1 set)

Rs………………..

9. Single phase Terminal Connector at Generator Transformer terminals including expansion bellow, flexibles & matching flanges (1 set)

Rs………………..

10. Single phase Terminal Connector at Unit Transformer terminals including expansion bellow, flexible & matching flanges (1 set)

Rs………………..

11. Single phase Terminal Connector at LAPT Panel terminals including expansion bellow, flexible & matching flanges (1 set)

Rs………………..

12. Single phase Terminal Connector at NGT Panel terminals including expansion bellow, flexible & matching flanges (set)

Rs………………..

13. Single phase terminal connector at static excitation transformer terminals including expansion bellow, flexible, matching flanges, hardware, bolts, accessories etc (1-set)

Rs………………..

14. Single phase terminal connector at neutral duct (gen side) terminals including expansion bellow, flexible, matching flanges, hardware, bolts, accessories etc (1-set)

Rs………………..

15. Flexible connectors (Single Phase one set)– Main run current rating

Rs………………..

16. Flexible connectors (single phase one set) – Delta run current rating

Rs………………..

17. Flexible connectors (single phase one set) – Tap-off run current rating

Rs………………..

18. Expansion Bellows (Metallic) (One no.) 18.1 Main run current rating Rs………………..

18.2 Delta run current rating Rs………………..





18.3 Tap-off run current rating Rs………………..

18.4 Neutral run current rating Rs………………..

19. Expansion Bellows – Equipment Terminating End 19.1 GCB Termination – if applicable Rs………………..

19.2 GT Rs………………..

19.3 UT Rs………………..

19.4 LAPT Rs………………..

19.5 Neutral Duct (Gen Side) Rs………………..

19.6 NGT (NGT Panel Side) Rs………………..

19.7 Static Excitation transformer Rs………………..

20. Single phase tee-of connection for tap-off bus 20.1 Main run-delta run (rating as per project) Rs………………..

20.2 Main run- Common tap-off run (rating as per project) Rs………………..

20.3 Common tap off run- Tap-off run (rating as per project) Rs………………..

21. Single-phase 90 degree Bend for conductor and enclosure, horizontal

21.1 Main run current rating Rs………………..




22. Single-phase 90 degree Bend for conductor and enclosure, vertical

22.1 Main run current rating Rs………………..




23. Bolted disconnect link (Single phase) - rigid 23.1 Main run current rating Rs………………..




24. Seal Off Bushing – Main run (One no.) Rs……………….. 25. Seal Off Bushing – Tap off (One no.) Rs……………….. 26. Seal off Bushing – Neutral run (One no.) Rs……………….. 27. Seal off bushing – Delta run (One no.) Rs……………….. 28. Galvanized Steel Structure (kg) Rs………………..







Email id -

Telephone no -


29. Tap-off CTs 29.1 Core-1 UT differential in UT tap-off (rating as per spec) – one

no. Rs………………..

29.2 Core-2 UT over current in UT tap-off (rating as per spec) – one no.

Rs………………..

29.3 Core-3 overall differential in UT tap-off (rating as per spec) – one no.

Rs………………..

29.4 Overall differential in static excitation transformer tap-off (rating as per spec) – one no.

Rs………………..

30. Overall differential CT core in main run (rating as per spec) – one no.

Rs………………..





SCHEDULE-D

ENGINEERING / MANUFACTURING / CONSTRUCTION AND COMMISSIONING SCHEDULE

The Bidder shall indicate below key milestone events of various activities in case the contract is awarded to him. The Bidder shall also furnish a part network showing such activities. All periods to be indicated in weeks after placement of Letter of Intent (LOI).



Email id -

Telephone no -


TECHNICAL SPECIFICATION FOR GENERATOR BUS DUCT



SCHEDULE – E PRICE BREAK-UP OF ERECTION & COMMISSIONING SPARES

S. No.

Item Description Qty. Unit Price (*Indian Rs. / US $)

Total Price Sales tax on direct

transaction only

Total Price FOR site

CIF (For spares

supplied from

abroad)

Ex-works (For

indigenous

spares)

CIF (For spares

supplied from

abroad)

Ex-works (For

indigenous

spares)

Rate (%)

Amount

Local transportatio

n charges (including

inland insurance,

port clearance & port

charges)

For spares

suppliedfrom

abroad

For Indigenous spares

1 2 3 4 5 6 = 3 x 4 7 = 3 x 5 8 9 10 = 6 + 8 + 9

11 = 7 + 8 + 9

Name of Firm : Signature : Name : Designation : Seal of Company Date : Note: 1. The mandatory spare parts indicating the item-wise cost shall be submitted along with the bid. 2. Continuation sheets of like size and format may be used as per Bidder’s requirements and shall be annexed to this schedule for each

system separately. * : Bidder at his option may quote the price of imported component in Indian Rupees (Bidder to specify).




SCHEDULE – F PRICE BREAK-UP OF MANDATORY SPARES

S. No.



transaction only


CIF (For spares

supplied from

abroad)

Ex-works (For

indigenous

spares)

CIF (For spares

supplied from

abroad)

Ex-works (For

indigenous

spares)

Rate (%)

Amount

Local transportatio


inland insurance,


charges)

For spares

suppliedfrom

abroad


1 2 3 4 5 6 = 3 x 4 7 = 3 x 5 8 9 10 = 6 + 8 + 9

11 = 7 + 8 + 9

Name of Firm : Signature : Name : Designation : Seal of Company Date : Note: 1. The mandatory spare parts indicating the item-wise cost shall be submitted along with the bid. 2. Continuation sheets of like size and format may be used as per Bidder’s requirements and shall be annexed to this schedule for each

system separately. *: Bidder at his option may quote the price of imported component in Indian Rupees (Bidder to specify).




SCHEDULE – G PRICE BREAK-UP OF RECOMMENDED SPARES

S. No.



transaction only


CIF (For spares

supplied from

abroad)

Ex-works (For

indigenous

spares)

CIF (For spares

supplied from

abroad)

Ex-works (For

indigenous

spares)

Rate (%)

Amount

Local transportatio


inland insurance,


charges)

For spares

suppliedfrom

abroad


1 2 3 4 5 6 = 3 x 4 7 = 3 x 5 8 9 10 = 6 + 8 + 9

11 = 7 + 8 + 9

Name of Firm : Signature : Name : ______

Designation : Seal of Company Date : ___________________ Note: 1. All the recommended spare parts indicating the item-wise cost shall be submitted along with the bid. 2. Continuation sheets of like size and format may be used as per Bidder’s requirements and shall be annexed to this schedule for each

system separately. *: Bidder at his option may quote the price of imported component in Indian Rupees (Bidder to specify).




SCHEDULE–H MAINTENANCE TOOLS AND TACKLES

Bidder shall furnish below item wise list of proposed special maintenance tools and tackles for which prices shall be indicated in the price schedule C: S.No. System/sub-system Description Quantity Note: Additional sheets of similar size and format may be annexed as per bidder's requirement. Stamp / seal of bidder - ……………………………….


Email id -

Telephone no -





SCHEDULE - I SCHEDULE OF DEVIATIONS

Bid Reference Spec Description Reasons for Price of Clause No. Section number deviation taken deviation Page No. Details of Deviation Vol No. We confirm that above are the only deviations from the Tender document and deviations appeared elsewhere in the Bid Proposal shall not be considered by the Buyer. Notes: 1. It is mandatory for the bidder to furnish Price of Deviation in the above Schedule of Deviation. 2. Acceptance or Non-acceptance of deviation is the sole discretion of the owner. 2. Additional sheets of similar size and format may be annexed as per bidder's requirement. 3. Deviations listed elsewhere will be summarily rejected and shall be ignored. 4. This schedule to be submitted with Technical Bid. Stamp / seal of bidder - ……………………………….


Email id -

Telephone no -





SCHEDULE-J EXPERIENCE LIST

No. Buyer Project PO Ref.

Rating (kV, A, Fault

Rating etc)

Value Target Commissioning

Commissioned on

Performance Person to whom reference may

be made

Remarks

1 2 3 4 5 6 7 8 9 10 11



Email id -

Telephone no -





SCHEDULE–K SCHEDULE OF GUARANTEED PARAMETERS

Bidder shall furnish the guaranteed parameter data in this schedule. The value shall be the maximum value including tolerances (no tolerances will be applicable on the values furnished). Fraction of a kW will be rounded of to the next digit. This value shall be used for evaluating the bidders offer by capitalizing the losses. Bidder shall stand guaranteed for the values declared in this sheet. The losses shall be evaluated & if actual losses are higher than the declared value the liquidated damages would be applicable at the rate specified in the specification. The equipment is liable for rejection if the actual value is higher by 3% over the declared value. Fraction of a kW will be rounded of to the next digit

Sr. No. Guaranteed Parameter Guaranteed Value in kW 1 kW Loss per phase/meter for main run

(current rating), including conductor & enclosure losses

2 kW Loss per phase/meter for delta run (current rating), including conductor & enclosure losses

3 kW Loss per phase/meter for tap-off run (current rating), including conductor & enclosure losses



Email id -

Telephone no -





SCHEDULE–L

SCHEDULE OF TECHNICAL EVALUATION

The Bidder is to complete this Schedule of Technical Evaluation, failing which his bid will not be considered. The information furnished in this schedule shall be binding and shall remain valid throughout the duration of the project.

S.

NO. PARTICULARS DOCUMENT SUBMITTED

1.0. PROPOSAL DATA SUBMITTALS

1.1. Schedule A: Key information of the bidder

( Yes/No )

1.2. Schedule B: Data Sheet

( Yes/No )

1.3. Schedule C: Price Schedule – (Unpriced Copy)

( Yes/No )

1.4. Schedule D: Engineering, Delivery & Commissioning Schedule

( Yes/No )

1.5. Schedule E: Price Break-up of Erection & Commissioning Spares

( Yes/No )

1.6. Schedule F: Price Break-up of Mandatory Spares

1.7. Schedule G: Price Break-up of Recommended Spares

( Yes/No )

1.8. Schedule H: Maintenance Tools & Tackles

( Yes/No )

1.9. Schedule I: Schedule of Technical Deviations

( Yes/No )

1.10. Schedule J: Experience List

( Yes/No )

1.11. Schedule K: Schedule of Guaranteed Parameter

( Yes/No )

2.0. SUPPORTING DOCUMENT SUBMITTALS

2.1. Guaranteed technical particular sheet ( Yes/No ) 2.2. General Layout / GA Drawing-Plan and Sections ( Yes/No ) 2.3. Busduct Main run, Tap off run Section General

Arrangement ( Yes/No )

2.4. GA Drg of LAPT, NGT ( Yes/No )




2.5. Flow Diagram of Pressurization system & Hot air blowing

( Yes/No )

2.6. Quality assurance plan ( Yes/No ) 2.7. Type Test Certificate of similar rated IPB ( Yes/No ) 2.8. Typical details of bus-insulator assembly, conductor /

enclosure connections rigid & flexible, seal-off bushings

( Yes/No )

2.9. Technical leaflets/Write-ups on various pieces of equipment offered

( Yes/No )

3.0. CONFIRMATION OF COMPLIANCE TO SCOPE

3.1. Scope of Supply as listed in Annexure A, Bill of material ( Yes/No) 3.2. Scope of Services / Work as per our specification ( Yes/No )



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ipbd

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