HINDUSTAN PETROLEUM CORPORATION LIMITED

ENGINEERING & PROJECTS

GRESHAM ASSURANCE HOUSE, 2ND FLOOR,
A-1595(3) 1-A, SIR P M ROAD, FORT
MUMBAI-400 001

TENDER DOCUMENT

FOR

1 NO. 2500 KVA TRANSFORMER

FOR

BOKARO DEPOT

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 INDEX
Sr. No. CHAPTERS PAGES
FROM TO

1 TENDER COVER PAGE 1 1

2 INDEX 2 2

3 PROJECT DESCRIPTION & SCOPE OF 3 4

WORK

4 TIME SCHEDULE 5 6

5 SCHEDULE OF QUANTITIES 7 8

6 TECHNICAL SPECIFICATIONS 9 36

7 QUALITY ASSURANCE PROGRAM 37 41

8 SPECIAL PAYMENT TERMS 42 42

9 DRAWINGS 43 43

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1.0. Scope of Work :-

The scope of work and explanatory notes given below are neither complete nor
exhaustive but are added to assist the contractor to understand the project. The
detailed scope is as described in the Technical Specifications. However, any item of
work required to be carried out for proper and satisfactory completion of work with
the highest standard of workmanship is deemed to be included in the scope of work.
The proposed Supply, Testing, Supervision & Commissioning of 1 No. 2500 KVA
Transformer for HINDUSTAN PETROLEUM CORPORATION LIMITED ( BOKARO )
.
2.0 Site Conditions:-

The project site is located at Bokaro in the state of Jharkhand. The vendor should
visit the site and obtain on the spot information required by him and having bearing
on this work.

3.0 Approval of Drawings & Schedules:-

All fabrication drawings for Transformer, shall be prepared and submitted by

vendor at no extra cost within the time stipulated by the HPCL/ Consultants and in
the manner so required by him. The vendor shall proceed with the work only after
approval of the HPCL/ Consultant. Such drawings shall be coordinated with all
disciplines of work. The vendor shall also coordinate along with the Electrical
Contractor in getting the approval from the Electrical Authority for the
commissioning of Transformer and prepare all relevant drawings for the same
purpose.

4.0 Drawings and Specifications:-

The Specifications and Schedule of rates shall be considered as part of this

contract and any work or material shown on schedule and not called for in the
specifications or vice versa, shall be executed as if specifically called for in both.
The drawings indicate the extent and general arrangements of the fixtures,
controlling switches, wiring system etc. and are essentially diagrammatic. The
drawings indicate the points of termination of conduit runs and broadly suggest
the routes to be followed.

5.0 Shop Drawings:-

The vendor shall prepare and submit the Consultants for his approval detailed Shop
drawings of 2500KVA Transformer and any other equipment to be fabricated by
vendor within 7 days of signing of the Contract.

ADDRESS OF LOCATION:-

Hindustan Petroleum Corporation Limited

Bokaro Depot Project Site
Balidih, Bokaro Industrial Area,
Bokaro Steel City – 827014.

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HINDUSTAN PETROLEUM CORPORATION LTD.
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 TIME SCHEDULE
DESCRIPTION OF WORK: SUPPLY, TESTING & COMMISSIONING OF
1NO. 2500 KVA TRANSFORMER AT BOKARO DEPOT.

LOCATION : BOKARO

COMPLETION PERIOD: 16 WEEKS FROM DATE OF ISSUE OF FOI/LOI/PO

NOTE:

1) Time for completion shall be reckoned from the date of issue of Fax/ Letter of
Intent/Purchase Order by HPCL.

2) Time for completion shall include the time required for mobilization,
demobilization, carrying out the works as per requirements of Contract Document
and instructions of HPCL Engineer-in-Charge.
3) Supply of the transformer only comes under the LD clause while Supervision &
Commissioning doesn’t comes under this clause.

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 SCHEDULE OFQUANTITIES

Sr. Description Quantity Unit

No.

Supply, Testing, Of TRANSFORMER of

2500KVA , 33/0.433KV, Oil Natural Air
1 cooled, Distribution transformer with 1 Each
OLTC, DYN11 vector group

2 Supervision & Commissioning of the 3 Man Day

TRANSFORMER

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 TECHNICAL SPECIFICATION

DISTRIBUTION TRANSFORMER - OIL COOLED TRANSFORMER 2500 KVA

1.0 GENERAL:

1.0 Scope of Work:

This specification covers design, manufacture, test at works, ensure, load, transport to site,
unload, and hand over 33 KV/433 Volts 2500 KVA Distribution Transformer with ON
Load tap changer switch. The scope shall cover Supply, Testing, Supervision and
Commissioning of outdoor type Step-down, transformers having the capacities and rating

mentioned below:-
a) 33000/433 Volts 2500 KVA 3 Phase 50 Cycles Step down transformer
This specification intends to give a general indication of the equipment and the bidder shall
submit an offer for suitable equipment to meet the specification requirements. The
bidder shall submit detailed technical specifications of the equipment together with
illustrative literature and equipment outline drawings.

b) The scope also includes providing assistance to the Electrical Contractor in taking the
approval of the Electrical Authority for the commissioning of the Transformer. The
assistance to be provided in the form of compliance of all the technical aspects required for
the Approval and providing the drawings of the transformer.

2.0 Works Excluded :

Civil works like foundations for the equipment are not included in the scope of this
specification. However, the successful bidder shall furnish dimension drawings and
relevant data required for planning the equipment foundations, cable trenches etc.
However all base channels and locking arrangements required to be grouted across the
cable trenches shall be provided by the successful bidder/bidder.

3.0 Standards :
Unless otherwise modified in this specification the transformers shall comply with the

Indian Standard Specification IS 2026 latest or relevant International Standard acceptable

to the purchaser, such as ANSI, OSA, DIN, IEC, etc. The specified equipments are of

standard industrial type and can be supplied by manufacturers active in the international

market.

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 Equipment meeting with the requirements of other authentic standards, which ensure equal

or better quality than the standards mentioned above, shall also be considered. When the

equipment is offered by the tenderer conform to other standards, salient points of difference

between the standards adopted and the standards specified in this specification shall be

clearly brought out in Schedule - D. A copy of such standards, in authentic English

translation shall be furnished along with the offer.

Equipment offered shall comply with all currently applicable statutory requirements,

regulations and safety codes applicable for design, quality of material and construction,

manufacture, inspection and performance.

In case of conflict arising out due to variations between the applicable standard and the

standards specified herein the provisions of this specification shall prevail.

3.1 The design, manufacture and performance of equipment shall comply with all currently
applicable statutes, regulations and safety codes in the locality where the equipment will
be installed. Nothing in this specification shall be constructed to relieve the Vendor of his
responsibility.

3.2 Unless otherwise specified equipment shall conform to the following latest applicable
Indian Standards

a) IS:2026/1977 - Power Transformer.

b) IS : 3639 - Fittings and Accessories for Power Transformer.

c) IS : 2099 - High Voltage Porcelain Bushings

d) IS : 335 - Insulating Oil for Transformers & Switch gears.

e) IS : 6600 - Guide for loading of Oil immersed transformers.

f) IS : 3637 - Specification for gas operated relays.

g) IS : 1271 - Classification of Insulating materials.

h) IS : 3202 - Code of practice, for climate proofing

i) IS : 8642 - ON Load Tap Changer.

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 j) IS : 8478 - Application guide for OLTC.

k) CBIP - Specification for power transformers.

l) IS : 1666, 1961 - Copper conductor for transformer winding.

4.0 Special Site Conditions :

4.1 All equipment shall be designed for operating in tropical humid and salt ladder
climate with temperature varying from 45 degree centigrade maximum and 10 degrees
centigrade as minimum.

4.2 Extreme care shall be taken to make the enclosed equipment proof against entry of
rats, lizards and other vermin. All ventilation and other openings provided in the
equipment shall have suitable oil seal.

4.3 Continuity of power supply his the first consideration and the equipment design shall be
such as to provide facilities to simplify maintenance, inspection, testing and general
repairs at site.
4.4 Climatic Conditions :

Maximum temperature - 45 Degree Centigrade.

Minimum temperature - 10 Degree Centigrade.

Relative Humidity - 85%

5.0 Equipment Specification

The general technical specification and Essential features for Distribution
Transformer are as stated below :-

5.1 General Specification :

5.1.1 System of Supply :

33 KV, 3 Phase, 50 Cycles, Solidly Earthed system.

5.1.2 Rating :

2500 KVA Rated Transformer as per the design considerations and as shown in
drawings.

5.1.3 No load Voltage :

33000 Volts on H.V. Side and 433 Volts on M. V. Side.

5.1.4 Ratio :

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 33000/433 Volts.

5.1.5 Connections :

Delta on H.V. side and Star on M.V. side with Additional Neutral Bushing brought out
for solid earthing from top of the tank cover.

5.1.6 Vector Groups :

Corresponding to the Vector Symbols Dyn-11

5.1.7 Impedance :

The Transformers shall be so designed and manufactured to have matched impedance for
a parallel operation. Impedance shall not exceed 6.25% and variation in impedance of the
ultimate finished product shall be with +/- 5% of the nominal impedance value.

5.1.8 Flux density:-

Flux density should not be more than 1.55 Tesla at the rated voltage and frequency.
Transformer core should be designed in such a way that it will not get saturated for any
value of V/f (Voltage/frequency) ratio to the extent of 112.5% of rated value of V/f ratio
(i.e. 33000/50). Actual core design along with calculations in support of it should be
enclosed with the offer.

5.1.8 Type :

Outdoor

5.2 Essential Features of Transformers-

5.2.1 Constructional Features:

a) Similar parts, particularly removable ones, interchangeable.

b) Exposed parts shall not leave pockets where water can collect.

c) Internal design of transformer shall ensure that air is not trapped in any location.

d) Materials in contact with oil shall be such as not to contribute to the formation of acid in
oil. Surfaces in contact with oil shall not be galvanized or cadmium plated.

5.2.2 Core :

a) The magnetic circuit shall be of "Core type" construction. The core shall be built out
of High grade, non ageing, low loss, high permeability, cold rolled grain oriented
silicon steel laminations.

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b) The finally assembled core shall be free from distortion. It shall be rigidly clamped to
ensure adequate mechanical strength and to prevent vibrations during operation.

c) The core shall be provided with lugs suitable for lifting the complete core and coil
assembly.

d) The core and coil assembly shall be so fixed in the tank that shifting will not occur during
transport or short circuits.

e) Prime HiB Grade material should be used for core Building. The Purchaser reserves the
right of measurement of core losses on a Raw core material. Prior to building of the core
the manufactures to submit the loss curve of CRGO material used in manufacturing.

f) Manufactures has to submit the bill of lading and certificate of Origin for Core Material,
Copper and other raw materials used in the manufacturing of the Transformer.

g) Manufactures should have in house facility for core cutting and slitting.

h) The grade of core laminations to be used shall be M4 or better. The successful bidder, shall
be required to submit the manufacturer’s test report showing the Watt Loss per kg and the
thickness of the core plate, to ascertain the quality of Core materials.The purchaser reserves
the right to get sample of the core material tested at any Government recognized
laboratory.
i) All core bolts shall be insulated from core and shall withstand 2 KV for one minute.

5.2.3 Internal Earthing :

All internal metal parts of transformer shall be earthed.

5.2.4 Winding :

a) Winding shall be subjected to shrinking and seasoning process, so that no further

shrinkage occurs during service. Adjustable devices shall be provided for taking up
possible shrinkage in service.

b) Materials used in the insulation and assemble of the windings shall be insoluble, non-
catalytic and chemically inactive in hot transformer oil, and shall not soften or be
otherwise affected under the operating conditions.

c) In case of DYN 11 transformers, neutral shall be brought out in open for solid earthing
on the secondary side, separately on the tank.

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d) The windings shall be of copper and of electrolytic grade with 99.9% Purity. The Purchaser
reserved the rights of conducting the purity test at Government approved lab. All the testing
changes will have to be born by the Contractor.

e) The winding shall be so designed that it can withstand the specified thermal and
dynamic short circuit current.

5.2.5 Tank :
The transformer tank and cover shall be fabricated from good, commercial grade,
low carbon steel plate of minimum 6 and 8 mm thick for side wall and 8 and 10mm thick
for top and bottom cover and suitable for welding for 2.5MVA transformers respectively.

a. Tank shall be made from good commercial grade low carbon steel and shall be of welded
construction. The tank and cover shall be of welded construction. All seams shall be
welded and wherever practicable, they shall be double welded. The tank weld shall be
reinforced by stiffeners of structural steel for general rigidity. The tank shall have sufficient
strength to withstand without permanent distortion under following conditions:

i Oil filing under vacuum.

ii Continuous internal gas pressure of 35 KPa with oil at operating level and

iii Normal Mechanical shock during transportation, loading and unloading operations.

b. The tank cover shall be bolted to the tank and the transformer design shall be such that the

tank will not be split between the lower and upper cooler connection for untanking.

c. The tank of the transformer shall be complete with all accessories and shall be designed so

as to allow the complete transformer filled with oil to be lifted by crane or jack transported

by road, rail or water way without over straining any joints and without causing subsequent

leakage of oil.

d. The main tank body excluding tap changing compartments, radiators and coolers shall be

capable of withstanding following vacuums.

Vacuum gauge pressure mm of Hg

(KN/sq.m.)

68.0 500

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 e. The base of each tank shall be so designed that it shall be possible to move the complete

transformer unit by skidding on plates or rails in any direction without injury.

f. Suitable guides shall be provided for positioning the core.

g. Tank shall be designed to permit lifting, by crane or jacks, of the complete transformer
assembly filled with oil. Accordingly the base shall be suitably reinforced to prevent any
distortion.

h. The material used for gaskets shall be good quality neoprene.

For gasket joints rubberized/Neoprene cork gasket shall be used. The gaskets shall be
placed in properly machined grooves with adequate space for accommodating the gaskets
under compression. Suitable mechanical stops shall be provided to prevent crushing of
gaskets. All gasketed joints are to be provided with each bolting position flexible copper
jumpers to maintain continuity. SRBC gaskets can be used.

i. All fasteners and bolts etc. shall be galvanized or zinc passivated.

5.2.6 Oil :
Transformer oil to be used in all the power transformers shall comply with the
requirements of latest IS 335 or relevant. In addition the oil should conform to `Ageing
Characteristics’ specified below for New Oil and Oil in Transformers. New oil - Ageing
characteristics after accelerated ageing (open beaker method with copper catalyst):

i Specific Resistance (Resistivity)

a) at 20 º C :- 2.5 x 10 12 Ohm-Cm (Min)

b) at 90 º C :- 0.2 x 10 12 Ohm-Cm (Min)

ii Dielectric dissipation factor - 0.20 (Max.tan delta) at 90 º C.

iii Total acidity mg/KOH/gm - 0.05 (Max)

iv Total sludge value (%) by weight - 0.05 (Max.)

v The method of testing these aging characteristics is given in Appendix - C of IS 335.

Oil filled in Transformers:

The important characteristics of the transformer oil after it is filled in the transformer
(within 3 months of filling) shall be as follows: -

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 Sr.No. Characteristics Specifications
1. Electric Strength (Breakdown voltage) 30 kV (Min)
2. Dielectric dissipation factor (Tan Delta) at 90 deg.C.) 0.01 (Max)
3. Specific resistance (Resistivity) at27 deg. C (ohm-cm) 10 x 10 12
4. Flash Point, P.M. (closed) 140 º C (Min)
5. Inter facial tension at 27 º C. 0.03N/M (Min)
6. Neutralization value (total acidity) 0.05mg.KOH/gm
(Max.)
7. Water content PPM 35 (Max)

a) Transformer shall be supplied with first filling oil conforming to IS : 335.

b) Additional 25 liters of Oil shall be supplied in non-returnable drum along with transformer
duly tested as per IS 335.

5.2.7 On Load Tap Changer switch

On Load tap changing arrangement on HV side to be provided.. The tapping to be

provided for variation of HV Voltage from +10% to - 10% in a basic steps of 1.25% each,
1. Wherever specifically specified, high speed on load tap changing gear shall be mounted on
the transformer.

2. The OLTC gear shall have diverter resistance or reactance and the current diverting contacts
shall be housed in a separate oil chamber segregated from the main tank of the transformer.
The contacts shall be accessible for insulation and shall be replaceable type.

3. Separate Buchholz relay/oil surge relay shall be provided on OLTC tank. Oil filled
compartment shall be provided with filling plug, design valve with plug air release vent,
inspection opening with gasketed & boat cover.

4. Deleted.

5. OLTC driving mechanism shall consist of

a) Suitable motor rated for 433V, 3 phase, 50 hz, AC squirrel cage motor with gear.
b) Energy accumulator with springs.

6. The OLTC motor shall have selector wheel & arm circuit switches to prevent motor over
travel in either direction.

The motor shall be provided with slip clutch.

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 7. OLTC shall be provided with the following modes of control,
a) Manual & electrical mode from local on the transformer itself.
b) Electrical mode from remote manually.

8. a) Electrical mode from remote automatically through voltage sensing relay.

b) Individual / parallel control on a Master / Follower.

9. The equipment shall be suitable for supervisory control and indication on a multi- way
switch, make-before-break, having one fixed potential free contact for each tap position. This
shall be provided in addition to any tap changer drive gear. This switch shall be provided in
addition to any switch which may be required for remote tap position indication purposes.
Supervisory indication shall also be provided in the form of contacts to close on ‘Tap change
incomplete’

10. Operation from the local or remote control switch shall cause one tap movement only until
the control switch is returned to normal or off position between successive operations.

11. All electrical control switches and the local operating gear shall be clearly in a suitable
manner to indicate the direction of tap changing.

12. The local control switches shall be mounted in the driving gear housing.

13. The equipment shall be so arranged as to ensure that when a tap change has been
commenced it shall be completed independently of the operation of the control relays or
switches. If a failure of the auxiliary supply during a tap change or any other contingency
such as tap changer getting stuck would result in that movement not being completed,
adequate means shall be provided to safeguard the transformer and its auxiliary equipment.

14. Suitable apparatus shall be provided to give indications as follows :

a) Mechanical indication at the transformer and electrical indication at the remote

Control panel of the number of the tapping in use on the transformer.
b) Tap change control is in progress, in RTCC panel.
c) For remote control, the switches, tap position indicator, etc. shall be mounted on the
remote control panel to be supplied by the bidder.

15. All relays and operating devices shall operate correctly at any voltage between the limits as
specified.

16. The tap changing switches and mechanism shall be mounted in separate compartment
mounted in an accessible position on the transformer tank.

17. Limit switches shall be provided to prevent over running of the mechanism and shall be
directly connected in the circuit of the operating meter. In addition a mechanical stop
device shall be provided to prevent over running of the mechanism under any condition.

18. Limit switches may be connected in the control circuit of the operating motor provided that
a mechanical declutching mechanism is incorporated.

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 19. Motor circuit shall be complete with switch fuse, thermal overload relay contactor. All
relays, switches, fuses, etc. shall be mounted in the marshalling box or driving gear housing
and shall be clearly marked for purpose of identification. They shall withstand the vibration
associated with tap changer gear operation.

20. The control circuits shall operate at 110 volts single phase AC voltage.

21. The whole of the apparatus shall be of robust design and capable of giving satisfactory
service without undue maintenance under the conditions to be met in service including
frequent operations. Counter shall be provided to the tap changing mechanism to indicate
the number of operations completed by the equipment.

22. A permanently legible lubrication chart shall be fitted within the driving mechanism
chamber.

23. Tap changer shall be complete with inspection covers, piping separate conservator tank,
buchholz relay, MOG on conservator, oil filling plug, air release plug, silica gel breather,
pressure relief device with 2A, 100V DC contact for remote annunciation/alarm/trip

24. For in-tank type OLTC pressure relief device shall be provided for transformer tank and oil
surge relay shall be provided for OLTC.

5.2.8 Temperature Rise:-

Continuously rated for full load, temperature rise not to exceed 45 degree centigrade by
thermometer in oil (50 degree centigrade by resistance). All the losses calculation shall be
submitted at 95 degree temp conditions. At 95 degree temp conditions the vendor should be
able to achieve minimum No load losses and minimum Full load losses. The losses should
be define at the time of offer.

5.2.9 Cooling :

Natural oil cooling by means of pressed/round tubes/ radiators around transformer tank,
ONAN type.

5.3 Accessories and Fittings:

Unless otherwise specified in the order, the following standard fittings shall be provided.

The fittings shall be in accordance with the details to the extent these are specified in latest

IS: 2026.
i Inspection covers.( Thickness of inspection cover shall be same as Top of the tank)

ii Rating plate to be riveted/bolted.

iii Terminal marking plate.

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 iv Two earthing terminals with crimping lugs.

v Lifting lugs.

vi Radiators. (18 SWG) The no. of radiators/fins and heat dissipation calculation to justify
the no. of radiators shall be submitted along with the offer.

vii Conservator with drain plug.

viii Dehydrating breather (Silica gel type) of 1 kg

ix Thermometer pocket.

x Oil level gauge indicating three positions of oil marked as under

a) Minimum (-) 5 º C
b) 30 º C
c) Maximum 98 º C

xi Oil filling hole with cap.

xii Air release device.

xiii Pressure relief device.

xiv Gas/Oil actuated relay (Buchholz Relay) with shut off valves on either sides.

xv Filter valves (lower valve to be also used as drain valve).

xvi Flanged wheels.

xvii Jacking lugs.

xviii Sampling valve.

xix Marshaling Box:

xx Vermin proof with required glands, locks, glass door, terminal Board, heater with
switch, illumination lamp with switch, terminal connectors etc.

xxi Oil Temperature Indicator with two contacts for alarm & Trip – 1 No.

xxii Winding temperature Indicator with two contacts for alarm & Trip –1 No.

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5.3.1 Inspection Covers:

Inspection cover on top of the transformer shall be provided.

5.3.2 Lifting lugs :

Lifting eyes or lugs shall be provided on all parts of the transformer, which require
independent handling during loading, unloading, assembly or dismantling. In addition, the
transformer tank shall be provided with lifting lugs, bosses and jacking pads properly
secured to the sides of the tank for lifting the transformer complete with oil either by crane
or by jacks.

The transformer shall also be provided with suitable haulage holes on the four sides with

suitably braced, pulling eyes for haulage of the transformer in longitudinal as well as

transverse directions.

The arrangement of lifting the active part of the transformer along with the cover of
the tank by means of lifting lugs without disturbing the connections. Also complete
transformer lifting lugs shall be provided. Lifting arrangement for core and coils shall
also be provided.

5.3.3 Jacking Pads:

Jacking pads shall be provided on the transformer.

5.3.4 Earthing Pads :

2 Nos. earthing pads shall be provided of copper or non-corrodible material on
transformer tank and suitable earthing terminals on cable boxes.

5.3.2 Diagram and Rating Plate :

The transformer shall be provided with non-corrosive, legible rating and diagram plate of

minimum 18 SWG Brass material. Rating and diagram plate shall be riveted/ bolted to the

transformer tank at an average height of about 1500 mm above the plinth level. The rating

and diagram plate shall bear data as specified in Part-3 of IS 2026 or relevant International

Standard. The plate shall also bear Name of purchaser viz. Damodar Valley Corporation
in full.

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 A plate showing the location and function of all valves and air release cocks or plugs shall

be provided.

In addition to the above a plan of the transformer giving the correct physical relationship
of the terminals shall be clearly indicated on the rating and diagram plate.

One diagram and rating plate indicating the details of transformer, connecting diagram,
Vector Group, tap changing diagram etc.

5.3.6 Air Release :

An air release hole with plug is to be provided on the top of the tank cover to facilitate the
release of the entrapped air while filling of oil.

5.3.7 Breather :
The transformer to be provided with an indicating dehydrating silica gel-breather of
sufficient capacity.

5.3.8 Oil Valves :

The transformers should be provided with the following Oil Valves: All free ends of the
valves to be blinded.

5.2.8 Filling Valve.

a) Main tank drain valve with flanged or threaded connection. The drain shall be so designed
such that, the 90% of the oil can be drained off in 10 minutes.

b) Top and bottom filter valves.

c) Oil sampling valve at center .

d) Pressure relief valve or explosion vent.

e) Shut off valve between conservator and the Buchholz relay.

d) Shut off valve between Buchholz relay and main tank.

5.3.9 Oil Conservator :

The transformer to be provided with an conservator with welded end plates. It is to be
bolted to the cover and can be dismounted for purposes of transport. It has to be provided

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 with oil level gauge with marking for minimum level and an oil filling hole with a
cap which can be used for filtering oil. For draining purposes a plug is to be provided.
A connection pipe between the conservator and main tank to be provided which projects
inside the conservator.

A conservator complete with sump and drain valves shall be provided in such a position as

not to obstruct the electrical connections to the transformer, having a capacity between the

highest and the lowest visible levels to meet the requirement of expansion of the total cold

oil volume in the transformer and cooling equipment from the minimum ambient

temperature i.e. -5 Deg. C to 98 Deg.C. The minimum indicated oil level shall be with the

feed pipe from the main tank covered with not less than 25 mm depth of oil and the

indicated range of oil level be from minimum to maximum.

Conservator will have volumetric capacity of at least 10 % of total volume of oil in the
tank Moreover the oil in conservator upto the minimum level mark on the oil level gauge
should be at least 3 % of the total volume of oil in the transformer excluding oil in the
OLTC. The conservator shall also be provided with oil filling hole, cap, drain valve, 15-
mm air release plug and silica gel breather. The size of the drain valve shall be 15 mm for
Conservator diameter of 650 mm and below. For higher size of the Conservator, the drain
valve shall be of 25 mm size. It shall be possible to completely drain the oil from
Conservator when it is installed in its normal position on the transformer.

Equaliser pipe shall be provided.

The oil connection from transformer tank to the Conservator Vessel shall be arranged at a
rising angle of 3 to 9º to the horizontal up to the Bucholz Relay and shall consist of 50
mm. inside diameter pipe as per latest IS 3639 or equivalent International Standard.

5.3.10 Rollers - Bi-directional Rollers

2 Nos. bi-directional plain rollers shall be provided to the transformers on each cross
channels to facilitate easy movement and positioning of the transformer. Rollers shall be
provided for being turned through an angle of 90 deg. and locked in that position when the
tank is jacked up.

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5.3.11 Thermometer Pocket

A pocket for reading oil temperature by thermometer along with thermometer 0-120
degree centigrade mercury in glass thermometers shall be provided. This pocket shall have
water proof, dust proof and weatherproof design to avoid contamination of transformer oil,
under outdoor usage.
5.3.12 Explosion Vent:
The tank shall be provided with a pressure release device. The device shall be
weatherproof and shall be provided with a diaphragm. The Equalizer pipe shall be
connected to the pressure release device (explosion vent) to the conservator. The vent
shall be placed in such a manner so that in case of diaphragm rupture the discharge of oil
shall not be on the transformer.

5.3.13 Tolerance:

The tolerance of guaranteed performance figures shall be as specified in the latest issue of

IS 2026 or relevant International Standard except wherever specified otherwise in this

specification.

5.4 Cable end boxes :

5.4.1 On H.V. Side :

Cable End Box to be provided for top entry cable and suitable for cable size of 3.0 Core x -
-- sq.mm 33 KV XLPE (E) Cable.

5.4.2 On M. V. Side :
On M.V. Side cable end box shall be provided suitable to accept 18 Run of 3.5Core X
300Sq. mm. XLPE cable. The Cable terminal box shall be provided with suitable Solid
Copper flats of proper size. The extended copper flats shall be suitable to accept the cable
terminations connections from Top.

5.5 Painting :

The interior of transformer tank, other oil filled chambers and internal structural steel
work shall be painted with heat resistant, oil insoluble insulating varnish after
thorough cleaning of all scales and dust.

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 a. Steel surfaces exposed to the weather shall be thoroughly cleaned and applied first
coat of zinc chromates, second coat of oil and weather resistant paint and final coat of
glossy oil and weather resistant non fading paint. The entire transformer shall be
painted with Three Coats of approved color paint shade. The shade to be used is RAL
7032 for the Transformer.

b. Before painting or filling with oil, the external surfaces of transformer tank and
structural steel work shall be completely cleaned and made free from rust, scale and
grease by applying shot blasting or sand blasting. Cavities on castings shall be filled by
metal depositions.

c. The interior of transformer tank, other oil filled chambers and internal structural

steel work shall be cleaned of all the scales and rust by application of standard

approved methods. There after these surfaces shall be painted with hot-oil resistant

varnish or paint.

d. Except for nuts, bolts and washers which may have to be removed for maintenance

purposes all external surfaces shall receive minimum of four coats of paint. The

total paint thickness shall be in the range of 52 to 60 microns.

e. The 1st and 2nd coats of painting shall be of primer and shall be applied immediately
after cleaning. The 3rd coat shall be of an oil and weather resisting quality, preferably
given a fungicide treatment and of a shade or color easily distinguishable from the
primary coats and shall be applied after the primary coats have been touched up where
necessary. The final coats shall be of glossy oil finish and weather resisting non-fading
paint of shade no. 220 (Olive Green) of IS 5 or relevant International Standard. Primer
paint shall be ready mix Zinc chromates as per IS 104 or relevant International
Standard. Intermediate and final coat of paint shall be as per IS 2932 or relevant
International Standard.

5.6 Noise :

The audible sound level measured at one feet from the external surface of the
transformer shall not exceed 75 db’s.

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6.0 Testing :
The Transformer shall be subjected to the following tests at the factory before
dispatching the same shall be witnessed by the Consultants and test certificates shall
be furnished :-

a) Measurement of winding resistance.

b) Ratio polarity and phase relationship

c) Impedance Voltage.

d) Load losses, copper losses.

e) No load loss and no load current.

f) Insulation resistance.

g) Induced over voltage withstand.

h) Separate source voltage withstand.

i) Heat Run Test at full load plus 20% over load for One hour.

j) Noise level Measurement test

k) Duty cycle of On-load Tap Changer.

l) Oil leakage gas collection, oil surge and voltage tests on gas and oil actuated relays.

All the routine tests shall be conducted in the suppliers'laboratory at their cost.
Heat run test shall be arranged free of cost on the unit selected from the 1st lot by our
Executive Engineer / Authorized Representative.
The calculations to confirm the thermal ability as per latest IS: 2026 Part-I or
equivalent International Standard, shall be submitted to our Executive Engineer (IW).

6.1 Type Tests (To be performed in presence of TPI Agency):-

The transformer offered should have been successfully type tested at NABL
laboratories, in line with standard and technical specifications, within the last 5 (five)
years from the date of offer. The tenderer shall furnish the following type tests reports
(along with General arrangement drawing, Rating and Diagram Plate and Internal
Constructional drawing) along with the offer.

i Impulse Voltage withstand Test on all three LV & HV phases.

ii Temperature Rise Test on Tap No. 17 (i.e. –15% voltage Tap)

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 iii Short circuit Test

iv Zero phase sequence test at all taps

v Audible sound level test

In case of Temperature Rise Test, if NABL laboratories are unable to carry out test at
their own laboratory, then bidder may hire services of NABL laboratories and carry out

Temperature Rise Test at their works with testing equipment of NABL. Test have to be

carried out by testing engineer of NABL and certification of the same have to be given
on NABL’s letter head.

If above tests are carried out beyond 5 years, then the offer may be considered for

placement of order however, successful bidders have to carry out the said type tests
before commencement of supply at their own expense.

If above tests are carried out on higher capacity of offered type transformer, then the
offer is considered for placement of order. However, successful bidders have to carry
out the said type tests on offered type transformers before commencement of supply at
their own expense.

The purchaser reserves right to demand repetition of some or all type tests, in the
presence of purchaser'
s representative. For this purpose, the tenderer may quote unit
rates for carrying out each type test.

For any change in the design/type already type tested and the design/type offered
against this specification, the purchaser reserves right to demand repetition of these
tests.

TPI Agency shall be one of the following:-

• DNV
• EIL
• BV
• IRS
• LLOYD’s
• SGS

6.2 Acceptance Test: -

a) Pressure test on tank & cooling system

b) Operational tests to show the correct functioning of all devices associated with the
transformer.

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 The tests mentioned above should be carried out at site.

6.3 Vacuum Test: -

The tank of a Power Transformer (excluding tap changing compartment, radiators and
coolers) shall be able to withstand a vacuum gauge pressure of 68.0 KN/ sq.m. (500
mm of Hg). The permanent deflection of the flat plate after subjecting the transformer
tank to the above vacuum for one hour shall not exceed the following values, without
affecting the performance of the transformer.

Horizontal length of flat plate Permanent deflection(mm)

Upto and including 750 mm 5.0
751 to 1250 6.5
1251 to 2000 8.5
2001 to 2250 11.0
2251 to 2500 12.5
2501 to 2500 16.0
Above 2500 19.0

7.0 Instructions Manual:

The successful bidder shall submit six copies of manual of complete instructions for the
installation, operation, maintenance and repairs, circuit diagram, foundation and trenching
details shall be provided with the transformers.

8.0 Rejection:

The Consultant/Owner, may reject any transformer if during tests or service any of the
following conditions arises:- ( Note :- All the losses are to guaranteed for the temp rise of
45 degree over the ambient of 50 degree and all the design calculations for the losses and
impedance shall be submitted before the inspection).
8.1 No load loss exceeds the guaranteed value by 10% or more.

8.2 Load loss and copper losses exceeds the guaranteed value by 10% or more.

8.3 Impedance value exceeds the guaranteed value by +/- 10% or more.

8.4 The difference in impedance values of any two phases during single phase short circuit
impedance test exceeds 2 percent of the average value guaranteed by the VENDOR.

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8.5 Oil or winding temperature rise exceeds the specified value by 5 Degree Centigrade.

8.6 Transformer fails on power frequency voltage withstand test.

9.0 Stage Inspection:-

The transformer will be tested for acceptance tests at factory, in the presence of Third
Party/ Consultant representative, before dispatch.

The inspection may be carried out by the purchaser at any stage of manufacture. The

successful tenderer shall grant free access to the purchaser'

s representatives at a
reasonable time when the work is in progress. Inspection and acceptance of any
equipment under this specification by the purchaser shall not relieve the supplier of his
obligation of furnishing equipment in accordance with the specifications and shall not
prevent subsequent rejection if the equipment is found to be defective.

10.0 General Technical Requirement:-

10.1 The Remote Control Cubicle:-

The remote control cubicle will be complete with:

a) Relays in the control circuit for the operation of the transformers in parallel.

b) Tap position indicator.

c) Tap change in progress lamp (white color) with circuit interrupter for blinking.

d) Lamps (white) showing healthy auxiliary supply from 240/110 Volts Center point
earthing.

e) Time delay contactors 1-5 Seconds with 5 Amps. Contacts for tripping when a follower
fails to go into steps with the master together with indication.

f) Oil temperature alarm with suitable cancellation device.

g) Winding Temperature alarm with suitable cancellation device for 2.5 MVA X’mer.

h) Signaling apparatus for out-of-step alarm.

i) Time delay contactors 1-5 Seconds for tripping due to incorrect coupling in master
position.

j) (out of step tripping). The desired time delay for tripping will be to 50 Seconds.

k) Remote Push Button for Lower & Raise Tap.

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 l) Alarm cancellation Push Button.

m) Tap Changer Supply Isolating Switch.

n) Sequence Selector Switch.

o) Out of Step Alarm with Cancellation Push Button.

p) Panel Strip Heater with Switch.

q) Panel Lamp with Door Switch.

r) The circuit arrangement shall be flexible to provide for addition of a transformer at a

later date. The scheme will be such that a selector switch can be provided so that any one
transformer of the group can at a time be selected as '
Master'
,'follower'or '
independent'
.

s) Tapping method:

1) The switch position no.1 shall correspond to the maximum plus tap.

2) The primary winding shall be connected delta and secondary winding star as per
vector group DYN 11 (IS 2026 latest version.) so as to produce a positive
displacement of 30 deg. from the primary to the secondary vector of the same phase
(vector rotation assumed counter clockwise).
3) The neutral point of the secondary winding shall be solidly earthed and should be
brought out to separate insulated terminal through an earthing current transformer for an
earth leakage relay to be connected whenever required.

11.0 Over Loading:-

The Power transformer shall be suitable for operating under overload condition as
specified in IS 6600. and a separate Over Loading chart should be submitted along with
offer.

12.0 Quality Assurance

The tenderer shall invariably furnish following information along with his offer failing
which his offer will be rejected.
Certificates of following materials.
i Copper conductor
ii Transformer oil
iii Core
iv Insulations.

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 v Porcelain Bushings
vi Steel Plate used for Tank
Names of the supplier for the raw material, list of standard according to which the raw
materials are tested, list of test normally carried out on raw materials in presence of
tenders’ representatives, copies of type test certificates.

Information and copies of test certificate as in (i) above respect of bought out accessories
including terminal connectors.

List of manufacturing facilities available. In this list the tenderer shall specifically mention
whether lapping machine, vacuum drying plant, air conditioned dust free room with
positive air pressure for provision of insulation and winding etc are available with him.

Level of automation achieved and list of areas where manual processing still exists.

List of areas in manufacturing process where stage inspection are normally carried out for
quality control and details of such tests and inspections.

Special features provided in the equipments to make it maintenance free

List of testing equipment available with the tenderer for final testing of transformers and
test plant limitation, if any, vis-à-vis the type, special acceptance and routine tests specified
in the relevant standards and the present specification. These limitations shall be very
clearly brought out in Schedule – F i.e. schedule of deviations from specified test
requirements.

The successful tenderer shall submit the Routine Test Certificate along with central Excise
Gate Passes for the following raw materials viz Oil, Copper for Conductors, insulating
materials, Core materials, Bushing at the time of routine Testing of the fully assembled
transformer.

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 DOCUMENTS TO BE SUBMITTED

Following documents should be submitted along with offer.

1. Flux Density Calculations

2. Heat Dissipation calculation

3. Type Test Reports

a. Impulse Voltage withstand Test on all three LV & HV phases.
b. Temperature Rise Test on Tap No. 17 (i.e. –15% voltage Tap)
c. Short circuit Test

4. Test Certificates of following bought out materials.

a. Copper conductor
b. Transformer oil
c. Core
d. Insulations.
e. Porcelain Bushings
f. Steel Plate used for Tank

5. Names of the supplier for the raw material.

6. List of manufacturing facilities available.

7. List of testing equipment available with the tenderer.

8. Drawings:- A set of following drawings shall be submitted by the tenderer along with the offer:
a. General Dimensional drawing.
b. Core details drawing.
c. Rating & Diagram Plate Drawing.
d. HV/LV Bushings
e. Marshaling Box with connection diagram.

The tenderer should also furnish the following O.L.T.C. drawings along with the offer.
f. Tap changer phase diagram.
g. G.A. of Tap changer control panel.
h. Wiring diagram of tap changer control panel.
i. Schematic diagram for group control of tap change gear.
j. OLTC Rating Plate.
k. O&M Manual.

9. Documentary evidence to prove experience of not less than 5 years in Design, Manufacture, supply
and Testing at work for equipment / materials offered for equal or higher voltage class.

10. Documentary evidence to prove that tenderer have a minimum turnover of 60% of the value of
the material offered in any one financial year during the previous 3 years.

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 DATASHEET OF 2500KVA TRANSFORMER

1. Specification I. S. 2026.

2. KVA 2500KVA

3. No. Load Ratio. 33000 / 433V

4. Control & Relay Panel (RTCC) Required

5. AVR Required

6. Outdoor/ Indoor Outdoor

7. Service Continuous

8. Phase Three Phase, 4 Wires Neutral brought out

9. Connective HV/ LV Delta/Star, Dyn11

10. Temperature rise Winding Temperature rise shall not exceed

50o C by resistance method & for oil shall
not exceed 45o C above ambient
temperature.

11. Tapping on H.V. ON Load steps of 1.25% between +5%.

To -15%
( 16 steps and 17 position)
12. Tapping on L.V. Constant 433V

13. Tests Routine & type as per IS : 2026.

14. Inspection Final Inspection required before despatch.

15. Drawings To be approved before manufacturer.

16. Guaranteed Losses Within limit stipulated by IS(to be

indicated).

17. H. V. Cable Box. H. V. Cable Box.

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 18. L. V. Terminals L.V. trifurcating air filled Cable Box –
Terminal suitable for Aluminium
Cables.

19. L.V. Neutral additional. One L.V. Neutral terminal brought outside
on bushing..
20. Accessories :

a. Conservator with fittings Drain Plug & filling pipe with cover.
b. On load tap Changing Switch With handle for manual operation-if
required.
c. Silica Gel Breather Yes.
d. Oil level Gauge Plain Oil Level Gauge.
e. Oil Drain Valve/ Plug Yes.
f. 4 Bi-directional Rollers Yes.
g. Explosion Vent Yes.
h. 6” Dial Thermometer With maximum reading pointer & Alarm
trip contacts.
i. Oil Filter Valve with Plug Yes.
j. Rating plate Yes.
k. Terminal Marking Plate Yes.
l. Two earth Terminals. Yes.
m. Thermometer Pockets Yes.
n. Lifting arrangements Yes.
o. First fill of oil as per IS : 335. Yes.
p. Air Release Plug Yes.
q. Cooling radiators Yes.
r. Platform Lugs. Yes.
s. Cover Lifters Yes.
t. Buchholz Relay Double float Buchholz Relay with Alarm
& Trip Contacts.
u. Marshalling box Weatherproof.
V 4-20mA signal for remote Required
monitering of transformer winding
and oil temperatures

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 N. B: The Transformer shall be manufactured as per IS : 2026 with latest amendment.
21.a Inspection & Testing Procedure. a) Transformer shall be inspected at Work’s
of Manufacturer for Routine Test as per
Specification in Section 16.1.2 of IS 2026
with latest amendment. The routine test
shall be as follows.
1) Visual Inspection.
2) Insulation Resistance Test.
3) Induce over Voltage with stand.
4) Ratio, Polarity, Vector Group Test.
5) Winding Resistance.
6) Measurement of Impedance Voltage.
7) No. – load losses & No. load Current.
8) (Load) Copper losses.
9) Separate Source Voltage with stand.

b) Type test Certificate shall be given by the

Manufacturer.

c) Oil used in the transformer shall be tested

as per Oil Tests Specification in IS : 335-
1972 as modified to date.

d) The tolerance on the above performance

tests shall be as specified in IS : 2026-1977.

e) The Manufacturer/ Supplier shall supply

Five Certified Copies of the Test Certified
in respect of each carried out on the
transformer & Transformer Oil.
21.b The test certificates shall give the 1) Losses.
actual measurements and also the 2) Impedance Voltage.
derived values for : 3) Efficiency at 50%, 75% full load at unity
& 0.8 p.f. Lagging and at 75o C
4) Regulation at unity & 0.8 p.f. Lagging.
The tender shall forward copier of test
Certificates for short circuit with stand
capability test from any reputed laboratory
such as CPRI on Transformer Manufacturer
offered.

b) In addition to the specified above, the

Client/Consultant reserves the rights to have

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 any reasonable tests carried out at the
Manufacturer’s work or at site.

c) The Client/ Consultant reserves the right

to witness the tests at the Manufacturer’s
works, at its discretion. The Supplier shall
intimate complete manufacturing
programme to be undertaken well in
advance.

22. Drawings 1) Tenderers shall submit in four copies the

following drawings along with the
Quotations :
a) Dimensional drawing of the Transformer
offered.
b) Diagram of Connection.
c) Drawings showing arrangement of
tappings & Tap changing Switch.
d) Dimensional Drawings showing LV Cable
Box & H.V. Connections.
e) Foundation Drawing.

2) The Drawings shall be to scale & fully

detailed. All important dimensions shall be
given & materials of each component shall be
indicated.

3) The successful Tender will be required to

supply in four copies, copies of drawings
as specified above.
23. Manual for installation, Four copies of manual for installation,
maintenance & 0peration. maintainance and operation of Transformer to
be supplied by the Manufacturer.

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 QUALITY ASSURANCE
PLAN

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1.1] QA PLAN

1.2] ITP

1.3] DRAWING SCHEDULE

1.4] PROGRESS REPORT AND SCHEDULE

1.5] WAIVER AND DEVIATION

1.6] PROCUREMENT OF BOUGHT OUT MATERIALS

1.7] CALIBRATION RECORDS

1.8] INSPECTION TEST STATUS

1.9] QUALITY RECORDS

1.10] IDENTIFICATION AND TRACEABILITY

1.11] VENDOR DOCUMENT FOR REVIEW AND RECORDS

1.12] DOCUMENTS UNDER REVIEW CATEGORY.

1.13] FINAL DOCUMENTS

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1.1] QA PLAN

VENDOR DURING BIDDING STAGE SHALL SUBMIT HIS QUALITY ASSURANCE PLANS
(QAP) CONSISTING OF RELEVANT PROCEDURES COVERING VARIOUS ACTIVITIES LIKE
DESIGN AND ENGINEERING, MATERIAL PROCUREMENT , MANUFACTURE INSPECTION
AND TESTING, DOCUMENTATION, DISPATCH TO SITE , ERECTION AND
COMMISSIONING WHEREVER APPLICABLE AND MAINTENANCE OF QUALITY
RECORDS IN THE POST ORDER STAGE. THE VENDOR SHALL SUBMIT THE QAP TO THE
SITE ENGINEER FOR APPROVAL WITHIN 2 WEEKS FROM THE DATE OF RECEIPT OF
LOI/PO WHICHEVER IS EARLIER. THE QAP SHALL BE APPROVED BY THE AUTHORIZED
REPRESENTATIVE OF TPI AGENCY AND THEN TO HPCL AFTER THE APPROVAL OF TPI
AGENCY.

1.2] ITP

VENDOR SHALL SUBMIT INSPECTION AND TEST PLAN FOR APPROVAL WITHIN 2
WEEKS OF LOI/PO AND BEFORE COMMENCEMENT OF MANUFACTURE TO THE SITE
ENGINEER AS WELL AS TO THE THIRD PARTY INSPECTION AGENCY (TPIA) THAT THE
VENDOR WISHES TO APPOINT FOR CARRYING OUT INSPECTION AND TESTING. THIS
DOCUMENT SHOULD CLEARLY SPECIFY THE NAME, DESIGNATION OF THE PERSON
CONCERNED (WITH TELEPHONE/MOBILE NO AND EMAIL) AND COMMUNICATION
ADDRESS OF THE TPI.

1.3] DRAWING SCHEDULE

VENDOR SHALL SUBMIT A TOTAL INDEX OF DRAWINGS AND DOCUMENTS REQUIRED

FOR APPROVAL/REVIEW/RECORDS ALONG WITH THE SCHEDULED DATE OF
SUBMISSION OF EACH DRAWING/DOCUMENT WITHIN 2 WEEKS FROM DATE OF ISSUE
OF LOI/ PO WHICHEVER IS EARLIER.

1.4] PROGRESS REPORT AND SCHEDULE

VENDOR SHALL SUBMIT MONTHLY PROGRESS REPORT AND UPDATE PROCUREMENT

ENGINEERING AND MANUFACTURING SCHEDULE EVERY MONTH STARTING FROM 2
WEEKS FROM DATE OF ISSUE OF FOI/PO WHICHEVER IS EARLIER.

1.5] WAIVER AND DEVIATION

VENDOR SHALL STRICTLY COMPLY WITH THE PO STIPULATIONS AND NO

DEVIATIONS SHALL BE PERMITTED.

1.6] PROCUREMENT OF BOUGHT OUT MATERIALS

ALL CRITICAL MATERIALS SUCH AS CASTING, FORGING, FITTING, PRESSURE

HOLDING PARTS ELECTRICAL AND INSTRUMENT ACCESSORIES ETC. SHALL BE

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PURCHASED BY THE VENDOR FROM SUB- VENDORS HAVING BV, LRIS OR CEIL
APPROVAL. VENDOR SHALL SUBMIT A LIST OF BOUGHT OUT MATERIALS FOR HPCL
APPROVAL WITHIN 2 WEEKS FROM THE DATE OF ISSUE OF FOI/PO WHICHEVER IS
EARLIER.

1.7] CALIBRATION RECORDS

VENDOR SHALL USE ONLY CALIBRATED MEASURING AND TEST INSTRUMENTS AND
MAINTAIN CALIBRATION RECORDS. VENDOR SHALL FURNISH RECORDS OF
CALIBRATION OF MEASURING AND TEST INSTRUMENTS INCLUDING RECALIBRATION
RECORDS TO THIRD PARTY INSPECTION AGENCY ON DEMAND.

1.8] INSPECTION TEST STATUS

INSPECTION AND TEST STATUS OF PRODUCTS SHALL BE IDENTIFIED BY USING

MARKINGS. AUTHORIZED STAMPS, TAGS, ROUTE CARDS, INSPECTION CARDS ETC.
DURING THE COURSE OF MANUFACTURE TO CLEARLY INDICATE ACCEPTANCE/
REJECTION OF TESTS/STAGES OF INSPECTION PERFORMED DURING ITS
MANUFACTURING CYCLE. THE IDENTIFICATION OF TEST STATUS SHALL BE
MAINTAINED AND RECORDS SUBMITTED AS AND WHEN DEMANDED BY HPCL/TPIA.

1.9] QUALITY RECORDS

VENDOR SHALL MAINTAIN QUALITY RECORDS AS PER HIS PROCEDURES. INSPECTION

REPORTS & TEST RECORDS COPIES SHALL BE FURNISHED TO HPCL/TPIA.

1.10] IDENTIFICATION AND TRACEABILITY

VENDOR SHALL ESTABLISH AND MAINTAIN A STANDARD WRITTEN PROCEDURE FOR

IDENTIFYING THE PRODUCTS FROM APPLICABLE DRAWING SPECIFICATIONS OR
OTHER DOCUMENTS DURING ALL STAGES OF PRODUCTION DELIVERY AND
INSTALLATION. A COPY OF THIS STANDARD PROCEDURE SHALL BE MADE
AVAILABLE TO HPCL/TPIA. THE VENDOR SHALL ENSURE THAT EACH PRODUCT
WHICH IS GOING IN THE PROCESS OF FABRICATION / MANUFACTURE /
CONSTRUCTION / ERECTION HAS PROPER IDENTIFICATION THROUGHOUT THE
PROCESS INCLUDING THE FINAL OUTPUT.

1.11] VENDOR DOCUMENT FOR REVIEW AND RECORDS

GENERAL

1] ALL DOCUMENTS SHALL BE IN ENGLISH LANGUAGE AND SI SYSTEM OF

UNITS.

2] REVIEW OF THE VENDOR DRAWING BY THIRD PARTY INSPECTION

AGENCY / HPCL WOULD BE ONLY TO REVIEW THE COMPATIBILITY WITH
BASIC DESIGN AND CONCEPTS AND IN NO WAY ABSOLVE THE VENDOR
OF HIS RESPONSIBILITY TO COMPLY WITH PO REQUIREMENTS,
APPLICABLE CODES, SPECIFICATIONS AND STATUTORY
RULES/REGULATIONS.

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 3] SUBMISSION OF DOCUMENTS FOR REVIEW/RECORDS SHALL COMMENCE
WITHIN 2 WEEKS FROM THE DATE OF ISSUE OF FOI/PO

4] THE VENDOR SHALL SUBMIT ALL DRAWINGS AND DOCUMENTS IN

THREE COPIES AS STIPULATED IN THE VENDOR DATA REQUIREMENT
ALONG WITH DOCUMENTS INDEX. THE DOCUMENTS SHALL ALSO BE
SUBMITTED IN SOFT COPIES TO EXPEDITE THE PROCESS OF
APPROVAL/REVIEW.

VENDOR SHALL ENSURE THAT EACH DRAWING SHALL CONTAIN THE

FOLLOWING INFORMATION:

PO NO NAME OF EQUIPMENT, TAG NO., NAME OF PROJECT, CLIENT, DRAWING/

DOCUMENT TITLE, DRAWING NO., REVISION AND DATE.

THE DRAWING DOCUMENT SHALL BE CHECKED APPROVED AND DULY SIGNED

STAMPED BY THE VENDOR REVISIONS AND DATE.

1.12] DOCUMENTS UNDER REVIEW CATEGORY.

FOLLOWING REVIEW CODES SHALL BE USED FOR REVIEW OF VENDOR DOCUMENTS /

DRAWINGS.

AFI: APPROVED FOR INSPECTION

AFM: APPROVED FOR MANUFACTURING / FABRICATION AS PER COMMENTS

VENDOR SHALL RESUBMIT THE SAME AFTER INCORPORATING THE
COMMENTS BEFORE CARRYING OUT FINAL INSPECTION BY TPIA AND
DESPATCH.

NOT APPROVED: RESUBMISSION REQUIRED IN CASES OF MAJOR NON-

CONFORMITIES WITH RESPECT TO PO SPECIFICATIONS.

1.13] FINAL DOCUMENTS

FINAL DRAWINGS/DOCUMENTS CONSISTING OF TECHNICAL DATA MANUAL AS A

COMPILATION OF AS-BUILT CERTIFIED DRAWING AND MANUFACTURING DATA AND
TEST RECORDS DULY CERTIFIED BY HPCL/TPIA SHOULD BE SUBMITTED IN THREE
SETS ALONG WITH SOFT COPY OF THE SAME.

INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTIONS OF THE

MATERIAL/EQUIPMENTS (WHEREVER APPLICABLE) SHALL ALSO BE SUBMITTED IN
THREE SETS AND IN SOFT FORMAT.

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 .

SPECIAL PAYMENT TERMS

The payment term shall be made as per the following subject to the clauses as per general terms and
conditions.

• Item No. 1:

80% on delivery of material at site (with prior clearance note for

despatch from Third party inspection agency)

20% after supervision & commissioning.

• Item No. 2:

100% payment shall be made after Supervision, Commissioning &

Acceptance of the transformer.

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HINDUSTAN PETROLEUM CORPORATION LTD.
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