BHARAT HEAVY ELECTRICALS LIMITED (A Govt Of India Undertaking)

POWER SECTOR – EASTERN REGION PLOT – DJ 9/1, SECTOR II, SALT LAKE

KOLKATA – 700 091

TENDER NO PSER:SCT:MJA-E973:09

VOLUME II

TECHNICAL SPECIFICATION & SPECIAL CONDITION OF CONTRACT

JOB ERECTION AND COMMISSIONING OF HT/LT TRANSFORMER, HT/LTBUS DUCTS, DG SET ETC.

CAPACITY 2x500 MW UNITS PROJECT MEJIA PH-II PROJECT,WESTBENGAL

TENDER SPECIFICATION NO. PSER:SCT:MJA-E973:09

VOLUME -II

FOR

ERECTION, TESTING AND COMMISSIONING OF GENERATOR TRANSFORMERS, STATION TRANSFORMERS, UNIT TRANSFORMER, UNIT AUX. TRANSFORMERS, OTHER MISC.

TRANSFORMERS, HT/LT BUS DUCTS, DG SETS AND ASSOCIATED PIPING, PANELS ETC., UNLOADING OF GENERATOR TRANSFORMERs /STATION TRANSFORMERS ETC

FOR

2X500MW UNITS OF MEJIA PH-II, W.B PROJECT;

BHARAT HEAVY ELECTRICALS LTD (A GOVT. OF INDIA UNDERTAKING) POWER-SECTOR-EASTERN REGION) SALT LAKE PLOT NO. 9/1, DJ BLOCK SECTOR II KOLKATA-700091

INDEX

SL NO

DESCRIPTION SEC./ ANNEX PAGE NO

1 COMMON CONDITION OF CONTRACT SECTION-I

2 SCOPE TERMINAL POINTS & EXCLUSION SECTION-II

3 SPECIAL CONDITION OF CONTRACT SECTION -III

4 WEIGHT SCH OF MAJOR ITEMS ANNEXURE-I

5 LIST OF T&P TO BE PROVIDED BY THE CONTRACTOR

ANNEXURE-II

6 LIST OF CONSUMABLES TO BE PROVIDED BY THE CONTRACTOR

ANNEXURE-III

7 LIST OF T&P TO BE PROVIDED BY BHEL ANNEXURE-IV

8 BILLING SCHEDULE ANNEXURE-V

9 RATE SCHEDULE VOL-III

10 LIST OF DRAWINGS/ DOCUMENTS ENCLOSURE

A) Electrical Single line diagram Drg. No. PE-DG-270-565-E001, Rev 01 (2 sheets)

SECTION -I

COMMON CONDITION OF CONTRACT.

1.1 SCOPE OF CONTRACT 1.1.1. The scope under this specification shall cover receipt of materials from BHEL/DVC store, site

stores / open yards / unloading bay of power house, directly from the incoming lorry / wagon within the project premises / within 1 km from the project gates, dragging to position (place of erection) / loading in the truck / trailer with the help of crane, handling at site / dragging to place of erection (wherever applicable ), shifting vendors’ store and / or to the floor / foundation where it is to be installed, protecting it from rain / water / fire / physical damage by properly covering and putting watch and ward for safe custody of materials, inspection of materials, submission of inspection reports for any shortage / damage or anything else called for, preservation / conservation, fixing of supports (base channels), pre-assembly, erection of equipment and support structures, leveling, alignment, grouting (grouting materials being in the scope of vendor and its specification given by BHEL at the time of grouting), testing, commissioning, calibration, trial operation, assistance t o PG. test, and handing over to the entire satisfaction of BHEL / Customer ( Damodar Valley Corporation ) for 2 X 500 MW Mejia Ph-II project, U#1&2 for Generator Transformers, Station Transformers, Unit Transformers, Unit Auxiliary Transformers, other LT transformers, Excitation Converter Transformers, Load Commuted Invertor, Medium voltage bridge Thyristor Modules, Gate driver Isolation Transformer, Medium voltage bridge Signal Distribution Board, DC Link Reactor, Electronic Control Panel, Isolated phase Bus duct, Segregated phase Bus duct, LT Bus duct, Neutral grounding Resistor for Station transformer & UATs, Neutral grounding Transformer ( with secondary resistor ) for Generators (IP Busduct), Top Chamber, SPVT cubicle, fan control panels, DG Set, DG AMF panel, AC distribution board, Battery, Battery chargers, etc., reconciliation of materials and returning of unused materials, scrap materials , packing cases / wooden boxes / cable drums etc. to BHEL or DVC’s stores / yards.

Unloading of the Generator Transformers and Station Transformers directly from the Trailor by Jacking & dragging, and dragging it to position is in the scope of the contractor. Payment shall be made as per the applicable item rate of the Vol-III. It is not the intent to specify completely here in all details of handling, erection, testing and commissioning of the above equipment. The omission of specific reference to any method, or test & equipment or material necessary for the proper and efficient services towards installation of the plant shall not relieve the contractor of the responsibility of providing such facilities / services to complete the project or portion of the project awarded to him. The quoted rate shall deem to be inclusive of all such contingencies. Only exclusions specifically mentioned in this tender shall be entertained in all matters.

1.1.2. Good quality and accurate workmanship for proper performance of the equipment are

absolutely necessary. BHEL engineers shall be the deciding authority towards quality requirement.

1.1.3. PROJECT INFORMATION A FOR MEJIA- Ph-II TPSA.1 Mejia Thermal Power Project is set up by Damodar Valley Corporation at a site about 30 km

from Durgapur in Bankura district of West Bengal. The station has an installed capacity of 4x210 MW+2x250 MW. The proposed units are being installed under present specification and designated as `2x500 MW Mejia 'B' TPS (U # 1 & 2)’. The bidder must visit to the site and acquaint with the conditions prevailing at site before submission of the bid. The information

given here under is for general guidance and shall not be contractually binding on the customer/ BHEL.

A.2 APPROACH TO SITE A.2.1 Nearest railway station - Durgapur (30 km), Ranigunj (23 km) & Bankura (40 km). A.2.2 Nearest town – Durgapur. A.2.3 Nearest airport - Netaji Subhas Chandra Bose Airport, Kolkata. A.3 OWNER

Damodar Valley Corporation Ltd. A.4 LOCATION OF SITE

Durlavpur village at the crossing of Raniganj - Bankura and Borjora - Durlavpur road under PS Gangajalghati in the district of Bankura, West Bengal.

A.5 SALIENT DESIGN DATA Unless otherwise specified, the following design condition shall be considered for the offer.

A.5.1 Ambient air temperature - Max 44 deg C in May-June, Min 4 deg C in Dec-Jan. A.5.2 Dry bulb temperature - 4.4 to 49.5 deg C. A.5.3 Wet bulb temperature - 27.7 deg C (average). A.5.4 Relative humidity - Max 100 % in monsoon season, Min 10 % in dry season. A.5.5 Rainfall - Annual average 1500 mm. A.5.6 Wind data - Wind velocity 0 to 15 km/hr, direction - winter- from west. A.5.7 Mean sea level - EL 108M to 116M. A.5.8 Seismicity - The area lies under Zone-III as per latest edition of IS:1893 code.

1.1.4. DEWATERING

Contractor shall ensure all times that his work area particularly at the low level area of cable trench, erection pit and approach / access roads are free from accumulation of water, so that the materials are safe and the erection/ progress schedule are not affected. No separate claim in this regards shall be admitted. The contractor shall at all time maintain dewatering pump of 5 HP 2 nos. for the purpose of dewatering of his area of work, without any extra cost.

1.1.5. VISIT TO SITE

Tenderers are advised to visit site and fully inform themselves of all local conditions and factors which may have any effect on the execution of the work covered under this tender specification. No claim on account of lack of information in respect of site conditions shall be entertained by BHEL at any time.

1.2 GENERAL 1.2.1 The intent of this specification is to provide services for execution of project according to most

modern and proven techniques and codes. The omission of specific reference to any method, equipment or material necessary for the proper and efficient services towards installation of the plant shall not relieve the contractor of the responsibility of providing such services/ facilities to complete the work or portion of work awarded to him. The quoted rates / total price shall deem to be inclusive of all such contingencies.

1.2.2 The vendor is to provide one no. P-4 Desktop Computer having DVD writer, one laser jet A4

size printer, one no. computer operator and one no. office boy for day to day official work. The maintenance of the computer and printer is in the scope of the vendor along with the consumable used (paper, ink of printer etc.) related with computer.

1.2.3 Receipt of materials from BHEL/DVC store, site stores / open yards / unloading at bay of power house, directly from the incoming lorry / wagon within the project premises / within 1 km from the project gates, dragging to position (place of erection) / loading in the truck / trailer with the help of crane, handling at site / dragging to place of erection (wherever applicable ), shifting vendors’ store and / or to the floor / foundation where it is to be installed, protecting it from rain / water / fire / physical damage by properly covering and putting watch and ward for safe custody of materials.

If any damage or descripancy is found, the vendor should inform to BHEL immediately and make a joint inspection of materials, submission of inspection reports for any shortage / damage or anything else called for preservation / conservation / insurance claim. If any theft occurs when the materials are in the vendors’ custody, the vendor has to lodge F.I.R. to the nearest Police Station, Gangajalghati P.S. for searching of the materials. If the materials are not traced out, it is to be replenished by the vendor, failing which BHEL may arrange the same at the risk and cost.

1.2.4 The contractor shall carry out the work in accordance with standard practices/ codes/

instructions/ drawings / documents / specification supplied by BHEL from time to time. 1.2.5 The work shall conform to dimensions and tolerances given in various drawing and documents

that will be provided during erection. If any portion of work is found to be defective in workmanship, not conforming to drawings or other stipulations, the contractor shall dismantle and redo the work duly replacing the defective materials at his cost, failing which, job will be carried out by BHEL by engaging other agencies/ departmentally and recoveries will be affected from contractor's bills towards expenditure incurred including BHEL's usual overhead charges.

1.2.6 Following shall be the responsibility of contractor and have to be provided within finally

accepted rates/prices.

(a) Provisions of all types of manpower, supervisors, engineers, watch and ward as required, tools and tackles, calibrated inspection, measuring and test equipment's (IMTEs) as specified and otherwise required for the work and consumables for erection, testing and commissioning including material handling.

(b) Proper out-turn as per BHEL plan and commitment. (c) Completion of work as per BHEL Schedule. (d) Good quality and accurate workmanship for proper performances of equipment. (e) Repair and rectification. (f) Preservation /Re-conservation of all components during storage under contractor’s

custody/ erection till handing over. 1.2.7 BHEL -Power sector (ER) is ISO 9001-2000 certified company. Quality of work, to customer's

satisfaction and as per system requirements are the essence of ISO 9001-2000 certification. The contractor in all respects will organise his work, systems, environment, Process control documentation, T&P inspection, measuring and testing equipment's (IMTEs) etc. as per instructions of BHEL engineer.

1.2.8 The contractor will comply with HSE (Health, Safety & Environment) requirements of BHEL and

follow all applicable Operational Control Procedures (OCPs) within quoted price. 1.2.9 The quoted price should include the following –

Regular cleaning of debris / rubbish from work spot Return of balance / scrap items, Packing boxes, crates / wooden planks and unused spares

by the contractor to BHEL / DVC Store. 1.2.10 The contractor should deploy fire extinguishers of required number in his office and work areas.

During oil filling as well as during filtration of transformers, the round the clock watch out service with requisite fire extinguisher are mandatory.

1.2.11 Earthing of equipments including instruments is also included under his scope. 1.2.12 The contractor shall take the full responsibility of testing, pre-commissioning and

commissioning of the equipment being installed by him under the overall supervision of BHEL. It shall be the responsibility of the contractor to arrange all the testing/ measuring instruments with the calibration certificates and complete all the testing, pre-commissioning and commissioning activities for the particular equipment as per relevant standards, code of practice, manufacturer’s instructions, applicable quality plans for installation, testing & commissioning and BHEL norms. All these will be witnessed by BHEL engineers /

representative of BHEL’s customer or both and reports signed jointly. The contractor shall submit a check list to BHEL prior to taking up testing and commissioning activities which shall be approved by BHEL and the activities shall be carried out in accordance with the check list.

1.2.13 The contractor shall provide necessary supervision, skilled / semi-skilled workmen, competent

experienced erection and commissioning engineers to carry out the tests independently, electrical license holder supervisors and electricians, erection tools and tackles, consumable, testing, measuring & commissioning instruments / equipment of required range, administrative personnel, transport vehicles, security guards for timely execution of the contract.

1.2.14 If occasion so demands that in order to achieve project schedule / milestone, various activities

are to be carried out at a time and the contractor should be able to provide necessary manpower, tools, tackles, equipment testing and measuring instruments for simultaneous working round the clock at no extra cost and no extra claim whatsoever will be entertained in this account.

1.2.15 While testing / commissioning, if the system involving the equipment erected and

commissioned by the contractor is observed to be not functioning properly and the contractor considers it to be arising due to defects in the purchaser’s equipment / system, it shall be the responsibility of the contractor to check, establish and demonstrate that either the defect exists in the purchaser’s equipment / system terminals or there is no defect in the equipment / system installed by the contractor inclusive of the interconnecting cabling upto the terminals of purchaser’s equipment. If the defect is established to be in the purchaser’s equipment or in the interconnecting cables not erected by the bidder the same shall be rectified by the purchaser.

1.2.16 Manufacturer’s drawings must be studied before handling, erection, testing and commissioning

of the switchgears, transformers and panels. Dragging of the equipment should be avoided and use of a crane and trailer / truck should be made for the handling purpose while transporting to various site of erection from the site stores. While lifting panels in packed condition, utmost care should be taken to avoid any damage to protective and metering equipments. The panels should preferably be kept inside the packing box till the foundations are made ready. However, once the material is issued to the contractor for handling / erection from BHEL custody, the preservation / conservation will be completely in the scope of the contractor.

1.2.17 During erection / commissioning of the equipments, if any component is found defective and it

is required to repair/replace, then the vendor has to give complete support for repairing / replacement of the component. The complete support includes the arrangement for dismantling of defective components, transportation of the materials from the plant premises to the’ loading point of BHEL arranged transporter’s vehicle, assembly of the same in position etc. on receipt of repaired material, without any extra cost.

1.2.18 It will be the responsibility of contractor to re-conserve / preserve the materials equipment,

provide watch ward after issued from BHEL stores. Contractor will do the routine maintenance of the equipment or will attend minor repair / trouble shooting jobs during handling, erection, commissioning till taken over by customer for commercial operation of the plant. The vendor has to follow the Field Quality plan from erection of the equipment to its commissioning. In each RA bill, the vendor has to submit the reconciliation statement, measurement sheet , protocols etc. as supporting documents of the bill. Contractor will have to submit test reports protocols, log-sheets as per Field Quality Plan at different stages of commissioning and trial operation in formats prescribed by BHEL.

1.2.19 All the requirements of the IE rules are to be strictly fulfilled and to be completed with providing

required consumables without any extra cost. All the test records & joint protocols are to be furnished to BHEL in three sets. With each RA bill, the related protocols, FQP dully filled in is to be submitted by vendor along with reconciliation statement upto that period of billing.

1.2.20 In each protocols, the joint signature of BHEL as well as DVC is to be considered for further

measurement of the work. The signature of BHEL only will not be sufficient for billing purpose. 1.3 PRELIMINARY WORKS. 1.3.1 Before starting erection job, contractor shall ensure that the area is sufficiently cleaned against

ingress of dust and water, and all debris have been cleared off from the floor to a designated area as per instruction of engineer. The contractor shall arrange to get the working area and surroundings cleaned daily to ensure a dust free atmosphere for working.

1.3.2 The accuracy of all equipment, instruments and their functioning shall be established before

they are permitted for use on the job. If the engineer doubt the accuracy of the precision tools any time during erection, the contractor shall arrange the checking of tools /equipment/ instruments at his cost.

1.4 CIVIL WORKS, FOUNDATIONS AND GROUTING. 1.4.1 Foundations for all equipment shall be provided by BHEL. The dimensions and locations of the

foundations, pockets, anchor bolt shall be checked by the contractor for their correctness as per drawings. Further, top elevation of foundations shall be checked with respect to bench marks etc. All minor adjustments of foundation level, dressing and chipping of foundation surfaces up to 50 mm, enlarging the pockets in foundations etc. as may be required for the erection of equipment/ plants shall be carried out by the contractor within the quoted /accepted price.

1.4.2 While on the job, care is essential to avoid too much chipping and resultant lowering of level. In

case of excess chipping contractor has to arrange additional packing plates as per requirements provided it is allowed by BHEL engineer. When required by manufacturers, the embedded sub-sole plates shall be scraped and checked with Prussian blue to get the required contact with frames.

1.4.3 The contractor shall ensure perfect matching of packer plates including scraping and blue

matching with foundation by dressing the foundation, as well as perfect matching between the packer plates and the base plate of equipment to the satisfaction of BHEL Engineer.

1.4.4 All civil works viz. making good of broken wall, grouting/ excavation/casting of foundation

anchor points for derricks, winches, guy ropes, fastening etc. and foundations required for any other temporary supports/works, required for safe and efficient operation of tools and tackles, shall be the contractor’s responsibility. For these civil works all materials (including cement) and required facilities will have to be arranged by contractor at his own cost. The grouting of the civil foundations of the equipments to be erected by the vendor is in the scope of vendor including the supply of all the grouting materials including cement. However, the grouting materials is to be approved by BHEL engineer. However, in case BHEL arranges cement, the same shall be on chargeable basis as per BHEL’s rule.

1.5 GENERAL GUIDELINES FOR FIELD ACTIVITIES 1.5.1 The vendor has to submit a L3 network programme before the start of work and has to submit

weekly progress report as well as advance weekly programme schedule. The contractor shall execute the works in a professional manner so as to achieve the target schedule without any sacrifice on quality and maintaining highest standards of safety and cleanliness.

1.5.2 The contractor shall co-operate with the Owner / BHEL and other Contractors working in site

and arrange to perform his work in a manner so as to minimize interference with other contractor’s works. BHEL’s Engineer shall be notified promptly of any defect in other contractor’s works that could affect the contractors work. If rescheduling of contractors work is requested by the Owner’s / BHEL’s Engineer in the interest of overall site activities, the same shall be compiled with by the contractor. In all cases of controversy, the decision of BHEL shall be final and binding on the contractor without any commercial implication.

1.5.3 The Engineer shall hold weekly meeting of all the contractors working at site at a time and a

place to be designated by the Engineer. The contractor shall attend such meetings and take notes of discussions during the meeting and the decisions of the Engineer and shall strictly adhere to those decisions in performing this work. In addition to the above weekly meeting, Engineer may call for other meetings either with individual contractors or with selected number of contractors and in such a case the contractor, if called will also attend such meetings.

1.5.4 Time is the essence of the contract and the contractor shall be responsible for performance of

his work in accordance with the specified construction schedule. If at any time the contractor is falling behind the schedule, he shall take necessary action to make good of such delays by increasing his work to comply with the schedule and such communicate such action in writing to the Engineer, satisfying that his action will compensate for the delay. The contractor shall not be allowed any extra compensation for such action.

1.5.5 The Engineer shall however not be responsible for provision of additional labour and / or materials or supply of any other services to the contractor except for the co-ordination work between various contractors as set out earlier.

1.5.6 The works under execution shall be open to inspection & supervision by BHEL’s / Owner’s

Engineer or his authorized representative at all times. The contractor shall give reasonable notice to BHEL before covering up or otherwise placing beyond the reach of inspection any work in order that same may be verified if so desired by the Owner / BHEL.

1.5.7 Every effort shall be made to maintain the highest quality of workmanship by stringent

supervision and inspection at every stage of execution. Manufacturer’s instruction manual and guidelines on sequence of erection and precautions shall be strictly followed. Should any error or ambiguity be discovered in such documents the same shall be brought to the notice of BHEL’s Engineer. Manufacturer’s interpretation in such cases shall be binding on the contractor.

1.5.8 The contractor shall comply with all the rules and regulations of the local authorities, all

statutory laws including Minimum wages, workmen compensation etc. All registration and statutory inspection fees, if any in respect of the work executed by the contractor shall be to his account.

1.5.9 All the works such as cleaning, checking, leveling, blue matching, aligning, assembling,

temporary erection for alignment, opening, dismantling of certain equipment for checking and cleaning, surface preparation, edge preparation, fabrication of tubes and pipes as per general engineering practice at site, cutting, grinding, straightening, chamfering, filling, chipping, drilling, reaming, scrapping, shaping, fitting – up, bolting / welding, stainless steel welding etc. as may be applicable in such erection and necessary to complete the work satisfactorily, are to be treated as incidental and the same shall be carried out by the contractor as part of the work.

1.5.10 It is the responsibility of the contractor to do the alignment etc. if necessary, repeatedly to

satisfy Engineer, with all the necessary tools & tackles, manpower etc. The alignment will be complete only when jointly certified so, by the contractor’s Engineer, with inspection Engineer / Owner and BHEL. Also the contractor should ensure that the alignment is not disturbed afterwards.

1.5.11 Equipment and material which wrongly installed shall be removed and reinstalled to comply

with the design requirement at the contractor’s expense, to the satisfaction of BHEL / Owner / Consultant or Owner’s representative.

1.5.12 After identification of erection materials by BHEL’s store / storage yard, it shall be the

responsibility of the contractor to take delivery of materials from BHEL’s store / storage yard by contractor’s own T&P / manpower and re-stack the leftover materials as per erection sequence at BHEL store at their own cost. The entire activities are to be carried out under supervision of BHEL’s MM Engineer at site.

1.6 ERECTION SERVICES 1.6.1 As part of the overall project management activity, the contractor shall be responsible for proper

co-ordination of erection activities during various phases of execution of the contract. The contractor shall identify a person designated as construction manager, with whom BHEL shall interact on matters related to execution of the contract. The construction manager shall be the single point contract person on behalf of the contractor. BHEL shall interact with the construction manager only on all matters on co-ordination between BHEL and the contractor.

1.6.2 The contractor shall confine all his field operations to those works which can be reformed

without subjecting the equipment materials to adverse effects, during inclement weather conditions like monsoon, storms etc. and during other unfavourable construction conditions. No field activities shall be performed by the contractor under conditions which might adversely affect the quality and efficiency thereof, unless special precautions or measures are taken by the contractor in proper and satisfactory manner in the performance of such works and with the concurrence of the Engineer. Such unfavourable construction conditions in no way relieve the contractor of his responsibility to perform the works as per the schedule.

1.6.3 The contractor shall supply all the skilled workmen, welders, gas cutters, electricians, riggers,

serangs, erectors, carpenters, fitters, masons, lagers, tin-smiths, instrument mechanics etc., in

addition to other skilled, semi-skilled and unskilled workmen required for all the works of handling and transportation from site store to erection site, erection, testing and commissioning, trial run etc. contemplated under this specification. Only fully trained and competent men with previous experience on the job shall be employed. They shall hold valid certificates wherever necessary. BHEL reserves the right to decide on the suitability of the workers and the other personnel who will be employed under the contractor. BHEL reserves the right to insist on removal of any employee of the contractor at any time, if they find him unsuitable and the contractor shall forthwith remove him.

1.6.4 The supervisory staff employed by the contractor shall be technically qualified and experienced

in the area of work. They shall ensure proper out turn of work and discipline on the part of labour put on the job by the contractor and in general see that the works are carried out in a safe and proper manner and in co-ordination with other labour and staff employed directly by BHEL or other contractors of BHEL and BHEL’s client / consultant.

1.6.5 The contractor shall finish daily labour report showing by classification the number of

employees engaged in various categories of work a progress report of work as required by BHEL Engineer. A daily erection progress report should be sent to BHEL as required by BHEL Engineer.

1.6.6 The work shall be executed under the usual conditions affecting major power plant construction

and in conjunction with numerous other operations at site. The contractor and his personnel shall co-operate with other personnel, and other contractors, co-ordinating his work with others and proceed in a manner that shall not delay or hinder the progress of work as a whole.

1.6.7 The contractor’s supervisory staff shall execute the work in the most substantial and workman

like manner in the stipulated time. Accuracy of work and aesthetic finish are essential part of this contract. The contractor shall be responsible to ensure that assembly and workmanship conform to the dimensions and tolerance given in the drawing / instruction given by BHEL Engineer from time to time.

1.6.8 It is the responsibility of the contractor to engage his workman in shifts or on overtime basis for

achieving the target by BHEL during erection, commissioning and testing period. The vendor has to deploy shift wise service round the clock if required for the progress of the work and to achieve the milestones in schedule without any extra cost. Similar type of round the clock service is mandatory during trial run operation, PG test and also during the shutdown period of the system, where the pending works are permitted to carriy out only during shutdown of the system. Contractor’s quoted rate shall include all these contingencies.

1.7 FACILITIES TO BE PROVIDED BY CONTRACTOR 1.7.1 Contractor shall be responsible for providing all necessary facilities like residential

accommodation, transport, electricity, water, medical facilities etc. as required under various labour laws and statutory rules and regulations framed there under to the personnel employed by him.

1.7.2 Contractor shall arrange at his own cost the construction of his temporary office, stores etc, and

also the watch and ward of all above. 1.7.3 On completion of work or as and when required by BHEL, all the temporary buildings,

structures, pipe lines, cables etc. shall be dismantled and leveled and debris shall be removed as per instruction of BHEL Engineer. In case of his failure to do so, same will be got done by the Engineer and expenses incurred shall be recovered from the contractor along with prevailing overhead. The decision of BHEL Engineer in this regard shall be final and binding on the contractor.

1.7.4 The contractor shall be responsible for handing back all lands, as given to him for his temporary

use, to BHEL, as per the instruction of BHEL Engineer. 1.8 FACILITIES TO BE PROVIDED BY BHEL 1.8.1 LAND 1.8.1.1 BHEL shall provide limited open space for office at site, free of charge. It is the responsibility of

the contractor to construct sheds, provide all utilities and dismantle and clear the site after

completion of work or as and when required by BHEL within the accepted rates. De-watering arrangement of basement floor till handing over under the scope of contractor.

1.8.2 WATER 1.8.2.1 BHEL will provide construction water free of cost at one point within 500M from given work

premises. 1.8.2.2 BHEL will provide free of cost one drinking water point within 500 M from given work premises. 1.8.2.3 Further distribution beyond above mentioned points is to be arranged by the contractor at his

own cost within the working area. 1.8.2.4 Contractor should arrange on their own, drinking water in their labour colony. 1.8.2.5 Drinking as well as Construction Water will be supplied 2 to 3 times in a day. Contractor will

have to arrange for storage of water to meet the day to day requirement. BHEL will however arrange for adequate supply of construction water to meet the requirement of water during major concreting /activities.

1.8.2.6 Contractor shall ensure that no water is wasted. In this regard the contractor shall take all

necessary measures towards preservation of water. 1.8.2.7 BHEL shall not be responsible for any inconvenience/delay caused due to any interruption of

water supply and no compensation for delay in work for such interruption shall be claimed by the contractor.

1.8.2.8 Necessary energy meters/water meters for recording consumption of power and water for cost

analysis purpose and for payment of taxes duties if become due to be paid and maintenance of the same during execution period shall be contractor's responsibility.

1.8.3 ELECTRICITY 1.8.3.1 The contractor shall submit to the Engineer his electrical power requirements. Construction

power at LT voltage level, shall be provided (FREE OF COST) at a mutually agreed points within 500 Metre of work premises as required and to be decided by engineer. Further distribution (including laying of cables / installation of DBs and maintenance of the same) beyond this point is to be arranged by the contractor at his own cost. Any other voltage as required shall be arranged by the contractor from power supply as above. Contractor will have to provide necessary calibrated energy meters (tamper proof, suitably housed in a weather proof box with lock & key arrangement), at point of power supply along with calibration certificate from authorized / accredited agency for working out the power consumption at his own cost. In case of recalibration required for any reason the necessary charges including replacement by calibrated meters is to be borne by the contractor. Supply of electricity shall be governed by Indian Electricity Act and Installation Rules and other Rules and Regulation as applicable. The contractor shall ensure usage of electricity in an efficient manner and the same may be audited by BHEL time to time. In case of any major deviation from normally accepted norms is observed, BHEL will reserve the right to impose penalty as deemed fit for such cases.

1.8.3.2 The bidder shall have to provide earth leakage circuit breaker at each point wherever human

operated electrical drives / T&Ps are deployed. 1.8.3.3 If construction power is failed due to some unavoidable circumstances, the vendor has to carry

out the work on putting DG set at his own cost. The delay in progress is not at all attributable to BHEL due to non-availability of the Construction Power.

1.8.3.4 The power supply will be from the available grid. BHEL shall not be responsible for any

inconvenience or delay caused due to any interruption of power supply and no compensation for delay in work can be claimed by the contractor due to such non-supply on the grounds of idle labour, machinery or any other grounds.

1.8.3.5 The contractor should ensure that the work in critical areas is not held up in the event of power

breakdown at his cost. As a part of the bid, a specific proposal in this regard has to be submitted by the contractor. In the event of breakdown in the electric supply, if the progress of

work is hampered, it will be the responsibility of the contractor to step up the progress of work after restoration of electric supply so that overall progress of work is not affected.

1.8.3.6 The contractor shall have to make arrangement at their own cost for illumination that will be

required in the working area for execution of the work & safety of workmen. 1.8.3.7 Following points should be strictly adhered to by the contractor while drawing construction

power supply from Distribution Board :

(a) All electrical installations should be as per Indian electricity rules. (b) All distribution Boards installed by the contractor should be constructed with fire proof materials

viz. Steel frames, bakelite sheets etc. (c) Connection for single phase should be taken from phase and neutral. No where the connection

should be taken with Earth as neutral. (d) All electrical connections should be made through connectors, nut and bolts, switches, plug and

sockets. Loose connections or hooking up of wires shall not be permitted. (e) Contractor will have to make their own earthing arrangement for their equipment/DB

earthing/temporary installations. The earthing connections have to be done with copper conductor and copper/brass clamps with BHEL's prior permission.

(f) All electrical equipment/tools and plants should be properly earthed. DBs to be earthed

diagonally opposite at two points. (g) Contractor should use "MCCB" and "ELCB" either on incoming or out going connections to the

DBs. (h) Contractor should ensure that all the DBs/TPNs/Fuses/MCCB/ELCB cables etc. should be of

adequate rating/capacity. (i) For permission of supply connections, contractor has to submit a test report of their installations

with a single line diagram of connectors proposed loads. (j) Contractor will submit a report on all electrical connected loads by 7th of every month. (k) ELCB will be tested once in a week by actually simulating the earth leakage for all installations

and the same shall be recorded by BHEL Engineer in the log book to be maintained by the contractor.

1.9 TOOLS AND PLANTS, IMTES & TESTING EQUIPMENT 1.9.1 TOOLS AND PLANTS ( TO BE PROVIDED BY CONTRACTORS ) 1.9.1.1 T & Ps, IMTES and testing equipment to be supplied by the contractor are mentioned in

ANNEXURE – II. The MIG welding machine should be fully Thyristorised and should be of MODEL AUTO K 400 OF ESAB INDIA LTD. or equivalent.

1.9.1.2 TEST CERTIFICATE FOR T & P

All T & Ps, lifting tackles, pulling devices, wire rope and slings to be deployed by the contractor must bear valid / latest test certificates for their suitability, and the documents shall be preserved at site.

1.9.1.3 The contractor is required to provide all necessary tools and plants (other than those specified

to be provided by BHEL) measuring (calibrated) instruments and handling equipments for timely completion of the total works as per contract. The quoted rate shall be inclusive of such requirements. However, the contractor shall submit deployment plan of all T&Ps along with tender bid.

1.9.1.4 In the event of any failure of the part of the contractor, BHEL may at his discretion also

terminate the contract on this ground and take out any or whole amount of the contract from the

scope of the contractor. Decision of BHEL in this regard will be final and binding in the contractor.

1.9.1.5 The T&Ps to be arranged by the contractor shall be in proper condition. 1.9.1.6 The list of T&P indicated in relevant annexure are the minimum expected to be provided by the

contractor. 1.9.1.7 All other tools and plants required for the work including Derricks, cranes, electric / hand /

pneumatic winches, tractor-trailors, air-compressors, trucks, welding generators / transformers, jacks, slings, pulley blocks, TIG /ARC welding equipment, heat-treatment equipment, temperature recorders, electrode drying ovens, pipe chamfering machines, hydraulic pipe bending machines etc. and tools and plants like chisels, scrappers, spanners, files, screw-drivers, electrical tools kits etc. required for timely completion of work shall be arranged by the contractor at his own cost. The contractor shall give a list of such equipment to be deployed by them giving details like nos available with them, nos to be deployed, capacity etc. of each item in the format enclosed in the annexure for General information about the contractor and the same shall be binding on the contractor during to execution contract. It may be specifically noted that the above items and those in Annexure – II have been mentioned just to give a broad idea to the contractor about the requirement of T&P for such works. However, all T&P’s required for smooth and timely completion of work shall be arranged by the contractor at his own cost and BHEL project manager’s decision regarding the requirement of a particular item shall be binding on the contractor. The equipment once deployed at site shall not be removed from site without the written consonant of BHEL, Construction Manager.

1.9.1.8 Sufficient quantities of Guy ropes shall be arranged by the contractor for erection / alignment

etc. 1.9.1.9 All tools and plants deployed by the contractor shall be as per the specification approved by

BHEL Engineers. 1.9.1.10 All the T&P, lifting tackles including wire ropes, slings, shackles and electrically operated

equipments shall be approved by BHEL Engineers before they are actually put on use. 1.9.1.11 The list of major T&P required to be deployed is indicated in Annexure – II. The list is minimum

and not exhaustive but anything required over and above these to suit the site condition / rate of progress / nature of work shall be arranged by contractor at his own cost.

1.9.1.12 Consolidation of ground and arrangement of sleepers/sand bag filling placement etc. for safe

movement of equipments/cranes/trailers etc. shall be the responsibility of contractor at their cost. Steel plates, if required, may be provided by BHEL free of cost on returnable basis.

1.9.1.13 All the T&P arranged for the contractor including electrical connections wherein required shall

be reliable / proven / tested with necessary test certificate. 1.9.1.14 IMTE

The contractor shall ensure deployment of reliable and calibrated instrument, measuring and test equipments ( IMTE ). The IMTE shall have test / calibration certificate from authorized / Govt. approved agencies. The contractor shall also keep provision of alternate arrangement for such IMTE so that the work does not suffer when a particular IMTE is sent for calibration. Testing / re-calibration shall also be arranged by the contractor at their own cost at regular interval during the period of use as advised by BHEL.

1.9.2 TOOLS AND PLANTS TO BE PROVIDED BY BHEL (on shared basis) 1.9.2.1 T&P as per Annexure – IV will be provided by BHEL. The machineries as prescribed in relevant

annexure (annexure-IV) will be provided to the contractor on free of cost basis as per availability.

1.9.2.2 The contractor shall ensure that machinery provided to him is kept in good running condition, all

along it's use by contractor and after use, it is returned to BHEL in good condition. BHEL's decision regarding condition evaluation shall prevail.

1.9.2.3 On availability, the cranes alongwith operator (along with helper, if any) will be provided to contractor on sharing and free of any hire charges basis. Required fuel for the Crane including mobil, grease and other consumables required for crane operation shall also be provided by BHEL.

1.9.2.4 Any damage/breakdown maintenance of the machinery arising out of improper handling by

contractor shall be to the account of the contractor. BHEL shall reserve the right of repairing the same to its own satisfaction at contractor's cost. During such outage of the machinery, BHEL shall not be responsible to provide any alternative. The contractor shall arrange for such alternative arrangement at his own cost.

1.9.2.5 The contractor shall return BHEL, T&P issued to him in good working condition as and when

desired by BHEL (on completion or reduction of work load). If return of equipment is delayed by contractor, hire charges as applicable shall be levied by BHEL from time it was requisitioned till the time of actual return. Hire charges shall also be charged on the equipment returned in damaged / un-serviced condition to BHEL TILL ITS SATISFACTORY REPAIR. Equipment returned in damaged un-serviced condition shall be got repaired by BHEL at its own discretion and entire cost of repair with BHEL overheads shall be recovered from the contractor.

1.9.2.6 In case of any machinery (given to contractor) remaining idle without any valid reason, BHEL

shall withdraw the equipment immediately for allotment to the contractor next in priority and no compensation shall be entertained on this account by BHEL.

1.9.2.7 The T&P scheduled to be provided shall be available on sharing basis and distribution of these

shall be done at the discretion of project manager, BHEL on the requirement / priority of the job and the availability of these items. In the event of non-availability of the listed crane, BHEL may explore the possibility of providing alternate higher/nearby capacity crane, found sparable with BHEL site. However, this is not a binding for BHEL. Such cranes of higher capacity (if provided by BHEL) will also be issued on same conditions as applicable to cranes listed in annexure-IV.

1.9.2.8 In the event of any damage or theft occurring to the issued T&Ps, while in use with the

contractor, due to their negligence, the same shall be repaired / replaced by the contractor at their own cost within the time stipulated by project manager, BHEL. Contractor's failure to do so shall entitle BHEL to get the above done through other agency and the cost so incurred by BHEL alongwith overheads shall be recovered from the contractor's bill.

1.9.2.9 The above mentioned items are for general guidance only. Except the above mentioned items,

the contractor has to deploy all other tools & plants required for proper & satisfactory completion of the job. The number of such items will be as per requirement.

1.9.2.10 Consolidation of ground and arrangement of sleepers/sand bag filling placement etc. for safe

movement of equipments/cranes/trailers etc. shall be the responsibility of contractor at their cost. Steel plates, if required, may be provided by BHEL free of cost on returnable basis.

1.9.2.11 Increasing/shortening of the crane boom to suit work requirements shall have to be arranged by

contractor at their cost. In case of non-availability of the T&Ps to be provided by BHEL due to any reason, the contractor shall plan/amend/alter his activities to meet erection/commissioning targets in consultation with BHEL. No additional compensation will be given for this.

1.9.2.12 Normal/Schedule maintenance of T&P spared to contractor on shared basis shall be carried out

by BHEL as per requirement. Contractor shall plan /alter his activities in line with availability of cranes to be issued by BHEL on sharing basis as per Annexure IV.

1.9.2.13 Actual use of T&P including marching as per entry in log-book duly certified by BHEL Engineer

shall be considered for calculation of overtime charges. 1.9.2.14 T&P issued shall be used only for the designated scope of work under specification. 1.9.2.15 In the event of contractor not using and/or maintaining BHEL T&P according to BHEL's

instructions, BHEL will have the right to withdraw such equipment without any notice and no claim in this regard shall be entertained and contractor shall be responsible for delay in execution on this account.

1.9.2.16 It shall be responsibility of the contractor to take delivery of T&P from stores or place of use of T&P by other contractor at project site, transport the same to site and return the same to BHEL store/place as intimated by BHEL Engineer at project site in good working conditions after use.

1.9.2.17 EOT CRANE 1.9.2.17.1 EOT crane shall be made available to the contractor in TG hall free of charges for erection

purpose as per availability on shared basis. As the operator will be from other agency/contractor, contractor will do necessary co-ordination.

1.9.2.17.2 The availability of EOT crane is likely to be hampered from time to time due to routine preventive

maintenance or break down maintenance. Contractor has to make alternative arrangement or plan/amend/alter his actions to suit the above condition and the contractor will not be entitled to any compensation due to this non-availability of the crane to maintain the schedule.

1.9.2.17.3 Services of EOT crane have to be provided to other agencies working in the power house

building or adjacent area as required. The decision of BHEL engineer for allocation of crane will be final. Contractor has to make adjustments accordingly.

1.9.2.18 ISSUE OF T & P

In the event of BHEL issued T & P, measuring instruments etc. the contractor and BHEL shall maintain joint protocol about the condition of all T & P, instruments etc. taken from BHEL’s custody and return to BHEL after use. The contractor shall not use these equipments for purposes other than the scope of work given in this tender document. Only T & Ps issued by BHEL as per Annexure –IV will be free of charges and balance T & P, measuring instruments etc, if issued to contractor, shall be on chargeable basis.

It is the responsibility of contractor to keep these equipments always in working condition and ensure their safe return in working condition to BHEL’s store subject to normal wear & tear.

After use of T&P items issued by BHEL the same shall be returned to BHEL in good working condition subject to normal wear & tear failing which recoveries at the book value of the item or the market rate prevailing at the time of returning the items, whichever is higher shall be made from the payments due to the contractor from BHEL from this contract or from any other contract.

1.10 CONSUMABLES 1.10.1 The contractor shall provide within finally accepted price, all consumables like welding

electrodes argon gas, filler, cleaning agents at different electrical joints and also at SP and IP bus duct joint portion etc as necessary for such work. For aluminium welding work (IP duct joints being Splice plate type welding joint and / or peripheral back tube type welding joint) of IP busduct and enclosures of SP busduct (if required), the vendor is to arrange the aluminum welding machine, filler, argon gas and welding electrodes. The rate of erection of IP Duct is inclusive the provision of welding accessories including consumables also.

1.10.2 For commissioning of DG set, acid filling to the batteries (supplied with DG package), charging

of the batteries is the responsibility of the vendor. The arrangement of required acid for filling in the battery and of battery charger is in the scope of vendor. The plant battery charger will not be provided for charging purpose. The specification of the acid is to be instructed by BHEL.

1.10.3 The replacement of engine oil, engine oil filter, lub oil filter, cleaning of radiators by the cleaning

agent, replacement of coolant of radiators is the responsibility of the vendor. However, all the consumables in this regards except battery acid will be provided by BHEL.

1.10.4 For testing, commissioning, trial run and handing over, procurement of Diesel from BHEL

authorized petrol pump, handling, transportation and filling in various stages including arrangement of container is in the scope of vendor. BHEL will reimburse the cost of diesel on submission of the bill of Petrol pump.

1.10.5 It shall be the responsibility of the contractor to plan the activities and store sufficient amount of

consumables. Non availability of any consumable materials or equivalent suggested by BHEL can not be considered as reason for not attaining the required progress or for additional claim.

1.10.6 BHEL reserves the right to reject the use of any consumable like electrodes, gases, lubricants/

special consumables etc. if it is not found to be of the required standard/make purity. 1.10.7 It shall be the responsibility of the contractor to obtain prior approval of BHEL regarding

suppliers, type of electrodes etc. before procurement of welding electrodes TIG wires. On receipt of electrodes at site these shall be subjected to inspection and approval by BHEL. The contractor shall inform BHEL in details regarding type of electrodes, batch no., date of expiry etc. and produce test certificate for each lot/batch with correlation of batch/lot no. with respective test certificate. No electrode will be allowed to be used without valid test certificate.

1.10.8 Shortage of any of the above electrodes/filler wire or the equivalent suggested by BHEL shall

not be quoted as reason for deficiency in progress or for additional rate. 1.10.9 All electrodes shall be dried in the electrode drying oven to the temperature and period

specified by the BHEL Engineer or as mentioned in WPS before they are used in erection work and each welder should be provided with one portable electrode drying oven at the work spot. Electrode drying oven and portable drying ovens shall be provided by the contractor at his cost.

1.10.10 The electrode drying oven will have thermometer for temperature indication. The thermostat

and thermometer of oven shall be calibrated before use and also periodically as advised by BHEL engineer and calibration test certificates (from authorised / Govt. approved /accredited test house traceable to National/International standards) will be submitted by the contractor at his cost.

1.10.11 BHEL reserves the right to reject the use of any electrode filler wire or any other consumables

at any stage, if found defective because of bad quality, improper storage, date of expiry unapproved type of electrodes/consumables, It shall be the responsibility of the contractor to replace the same at his cost without loss of time.

In case of improper arrangement for procurement of any consumables, BHEL reserves the right to procure the same from any source and recover the cost from the Contractor's first subsequent bill at market value plus the departmental charges of BHEL from time to time (30% at present). Postponement of such recovery is normally not permitted. The decision of Engineer in this regard

1.11 RESPONSIBILITIES OF THE CONTRACTOR IN RESPECT OF HEALTH, SAFETY &

ENVIRONMENT (HSE) The contractor shall ensure the safety of all workmen, materials and equipments either

belonging to him or to others working at site. He shall observe health, safety & environment rules and codes applied by the owner / BHEL at site without exception. Contractor will follow all applicable OCP (Operational Control Procedures) as prepared by BHEL, within quoted rate.

Bidder will follow all applicable OCPs (Operational Control Procedure) as prepared by BHEL,

within quoted rate. Non-conformity of health, safety & environment rules and safety appliances will be viewed

seriously and BHEL has right to impose fines on the contractor on each incident/each non-conformity as per details given below :

SL.NO. SAFETY / ENVIRONMENT REQUIREMENT FINE (RS.)

01. NOT WEARING SAFETY HELMET 150/- PER INCIDENCE 02. NOT WEARING SAFETY BELT 500/- PER INCIDENCE 03. GRINDING WITHOUT GOGGLES 50/- PER INCIDENCE 04. NOT USING 24 V SUPPLY FOR INTERNAL WORK 500/- PER INCIDENCE 05. ELECTRICAL PLUGS NOT USED FOR HAND

MACHINES 100/- PER INCIDENCE

06. NOT SLINGING PROPERLY 500/- PER INCIDENCE

07. USING DAMAGED SLING 1000/- PER INCIDENCE 08 LIFTING CYLINDER WITHOUT CAGE 500/- PER INCIDENCE 09 USING WELDING CABLES/ELECTRICAL WIRES

HAVING LOT OF JOINTS AND NOT INSULATED WITH PROPER /STANDARD CABLE INSULATING MATERIALS

1000/- PER INCIDENCE

10. NOT WEARING HAND GLOVES 200/- PER INCIDENCE 11. GAS CUTTING WITHOUT TAKING PROPER

PRECAUTION/NOT USING SHEET BELOW GAS CUTTING

1000/- PER INCIDENCE

12. IMPROPER EARTHING OF ELECTRICAL T&P 500/- PER EQUIPMENT13. NOT PROTECTING/LOCATING THE GAS CYLINDER

TO AVOID CATCHING OF FIRE 500/- PER INCIDENCE

14 GAS CUTTING WITHOUT FLASH BACK ARRESTOR IN CYL.

500/- PER INCIDENCE

15 TRANSPORTATION OF LUBRICANTS DRUMS BY ROLLING FROM STORE TO WORKPLACE.

1000/- PER INCIDENCE

16 OIL SPILLAGE IF NOT MOPPED UP WITHIN 4 HRS. OF SPILLAGE

1000/ - PER INCIDENCE

Any other nonconformity noticed not listed above will also be fined. The decision of BHEL engineer is final on the above. The amount will be deducted from running bills of the contractor. The amount collected on the above will be utilised for giving award to the employees of various contractors working at site who could avoid accidents by following safety rules and for improving the safety at site. Such award will be decided by the committee consisting of employees of contractors working within the project and be awarded in presence of BHEL representative.

Proper cleaning and upkeep of the working area on daily basis to the satisfaction of BHEL engineer is contractor’s responsibility. Failing which, BHEL will clean the area and deduct the cost with overhead from the contractor’s bill, dues etc.

1.11.1 BHEL-PSER is an ISO 14001 and OHSAS – 18000 company. Contractor has to STRICTLY

FOLLOW all the procedures and practices of BHEL-PSER in respect to its HSE policy. This will be within normal scope of work.

1.11.2 To avoid adverse environmental impacts, contractor shall employ trained persons for

hazardous chemical handling and handling of lubricants. For this, contractor has to employ suitable transfer pumps, hand trolleys, making of dykes to eliminate chances of spillage and earth contamination of chemicals and lubricants.

1.11.3 All efforts shall be made to avoid reworks at site. However, for bus ducts / pipes, in some cases

reorientation/re-routing may be required for ease of approach and operation. Contractor shall do the reorientation, re-routing work free of cost.

1.11.4 All tools tackles, lifting appliances, material handling equipment scaffolds, cradles, safety nets,

ladders, equipment etc. used by the contractor shall be of safe design and construction. These shall be tested and certificate of fitness obtained before putting them to use from time to time, as instructed by authorized BHEL official who shall have the right to ban the use of any item.

1.11.5 All electrical equipment, connections and wiring for construction power, its distribution and use

shall confirm to the requirements of Indian Electricity Act and Rules. Only electricians licensed by the appropriate statutory authority shall be employed by the contractor to carry out all types of electrical work. All electrical appliances including portable electric tools by the contractor shall have safe plugging system to source of power and be appropriately earthed.

1.11.6 The contractor shall not use any hand-lamp energized by electric power with supply voltage of

more than 24 volts, for work in confined spaces. 1.11.7 The contractor shall adopt all fire safety measures as laid down in the “ Code for Safety at for

Fire Safety at Construction Sites’ shall be made available by BHEL to the contractor for Construction Sites’’ issued by the Safety Department of the Construction Management ( HQ ) of BHEL and as per direction of the authorized BHEL official.

1.11.8 Where it becomes necessary to provide and / or store petroleum products, explosives, chemicals and liquid or gaseous fuel or any other substance that may cause fire or explosion, the contractor shall be responsible for carrying out such provisions and / or storage in accordance with the rules and regulations laid down in the relevant Government Acts, such as Petroleum Act, Explosives Act, Petroleum and Carbides of Calcium Manual of the Chief Controller of explosives, Govt. of India etc. Prior approval of the authorized BHEL official at the site shall also be taken by the contractor in all such matters.

1.11.9 The contractor shall arrange at his cost (wherever not specified) appropriate illumination at

work spots for safe working, when natural daylight may not be adequate for clear visibility. 1.11.10 The contractor shall be held responsible for any violation of statutory regulations (local, state or

central ) and BHEL instructions that may endanger safety of more equipment, material and environment in his scope of work of another contractor’s agency’s.

Cost of damage if any, to life and property arising out of such violation of statutory regulations

and BHEL instructions shall be borne by the contractor. 1.11.11 In case of a fatal or disabling injury accident to any person at construction site due to lapses by

the contractor, the victim and / or his / her dependents shall be compensated by the contractor as per statutory requirements. However, if considered necessary, BHEL shall have the right to impose appropriate financial penalty on the contractor and recover the same from the payments due to the contractor for suitably compensating the victim and / or his / her departments. Before imposing any penalty, appropriate injury shall be held by BHEL giving opportunity to the contractor to present his case.

1.11.12 In case of any damage to property due to lapses by the contractor, BHEL shall have the right to

recover cost of such damages from payments due to the contractor after holding an appropriate enquiry.

1.11.13 In case of any delay in the completion of a job due to mishaps attributable to lapses by the

contractor, BHEL shall have the right to recover amount to make-up such delay from payments due to the contractor, after notifying the contractor suitably and giving him opportunity to present his case.

1.11.14 If the contractor fails to improve the standard of safety in its operation to the satisfaction of

BHEL after being given a reasonable opportunity to do so; and / or if the contractor fails to appropriate safety precautions to provide necessary safety devices and equipment or to carry out instructions regarding safety issued by the authorized BHEL Official, BHEL shall have the right to take corrective steps at the risk and cost of the contractor after giving a notice of not less than seven days indicating the steps that would be taken by BHEL.

1.11.15 The contractor shall submit report of all accidents, fires and property damage dangerous

occurrences to the authorized BHEL Official immediately after such occurrence, but in any case not later than twelve hours of the occurrence. Such reports shall be furnished in the manner prescribed by BHEL. In addition, periodic reports on safety shall also be submitted by the contractor to the authorized BHEL Official from time to time as prescribed.

1.11.16 Before commencing the work, the contractor shall nominate a responsible officer to supervise

implementation of all safety measures and liaison with counterpart of BHEL. 1.11.17 If safety record of the contractor in execution of the awarded job is to the satisfaction of Safety

Department of BHEL, issue of an appropriate certificate to recognize the safety performance of the contractor may be considered by BHEL after completion of the job.

1.12 QUALITY ASSURANCE PROGRAMME The contractor shall adopt suitable quality assurance programme to control activities as

necessary, Such programme shall be outlined by the contractor and shall be finally accepted by the BHEL/Owner / authorised representative. A quality assurance programme of the contractor shall generally cover the following:-

1.12.1 The organisation structure and qualification data of key personnel for the management and

implementation of the proposed quality assurance programme.

1.12.2 System for site erection control including process controls and fabrication and assembly controls.

1.12.3 Control of non-conforming items and system for corrective actions. 1.12.4 Inspection and test procedure for all site related works. 1.12.5 Control of calibration and testing of measuring and testing equipment. 1.12.6 System for quality audit. 1.12.7 System for indication and appraisal of inspection status. 1.12.8 System for maintenance of records. 1.12.9 GENERAL REQUIREMENTS - QUALITY ASSURANCE 1.12.9.1 All materials, components and equipment covered under this specification shall be erected,

commissioned and tested at all the stages, as per a comprehensive Quality Assurance Programme of BHEL.

1.12.9.2 All necessary Erection and Commissioning Protocol related documentation is under the scope

of contractor. 1.12.9.3 Field Quality plans will detail out for all the equipment, the quality practices and procedures etc

to be followed by the contractor site quality control organisation, during various stages of site activities from receipt of materials/equipment at site.

1.12.9.4 Quality audit/approval of the results of tests and inspection will not prejudice the right of BHEL

to reject an equipment not giving the desired performance after erection and shall not in any way limit the liabilities and responsibilities of the Contractor in earning satisfactory performance of equipment as per specification.

1.12.9.5 Repair/rectification procedures to be adopted to make any job acceptable shall be subject to

the approval of BHEL/ Owner. 1.12.10 QUALITY CONTROL & QUALITY ASSURANCE Contractor's Engineers and supervisors shall be adequately qualified and also inclined to do a

quality job. The quality assurance Engineer shall co-ordinate all aspects of quality control, inspection, implementation of quality assurance procedures laid down in Quality Plan and technical specification by BHEL. He shall fill-up quality assurance log sheets / formats and submit to BHEL for joint inspection and acceptance.

1.13 SITE ORGANISATION 1.13.1 The contractor shall maintain a site organization of adequate strength in respect of manpower,

construction machinery and other implements at all time for smooth execution of the contract headed by a competent construction manager for all site operations with sufficient level of authority to take site decisions. The organization should have organization chart indicating various levels of experts to be posted for supervision in the fields in erection, commissioning etc. The organization shall be reinforced from time to time, as required to make up slippage's from the schedule without any commercial implication to BHEL.

1.13.2 BHEL reserves the right to reject or approve the list of personnel proposed by the contractor.

The persons whose bio-data have been approved by BHEL will have to be posted at site and deviation in this regard will not generally be permitted.

1.13.3 In addition to above, a well experienced qualified engineer to be designated, as 'Project Co-

ordinator' shall be deployed by the contractor. Such engineer shall remain fully involved in all planning activities, guidance etc. to contractor's own team during the complete execution period of contract.

1.13.4 The contractor should also submit to BHEL for approval a list of construction equipment's, erection tools, tackles etc. prior to commencement of site activities. The tools & tackles shall not be removed from site without written permission of BHEL.

1.14 ERECTION SCHEDULE 1.14.1 In order to achieve the over all completion schedule the contractor shall provide BHEL all the

information covering erection sequence, testing and commissioning activities. These schedules may be based on the recommended procedures and will be subject to discussions/agreements with the owner/BHEL subsequent to the award of contract.

1.14.2 The successful bidder shall have to provide all the above schedules in a tabular form in addition

to that in the form of network and these shall necessarily include information not limited to the earliest and latest dates for various activities/submissions and include any related constraints also.

1.15 CONTRACT MANAGEMENT 1.15.1 The contractor should also submit network programs for the erection and commissioning of

various items. These networks shall show the owner/BHEL hold points (CHP) which have to be. 1.16 CONSTRUCTION MANAGEMENT

The bidder shall prepare detail schedule L1/ (L-2) and submit within 30-days of LOI for BHEL approval, as per MILESTONE completion schedule given in this document. This schedule must include all milestone and key activities for each package/subsystems/components in his scope of work in the areas of mobilization, engineering, procurement, manufacture, inspection, despatch/ erection /commissioning / handing over. This network must conform to the overall requirement of the project schedule as detailed below. The bidder should also ensure monitoring of these activities at least on weekly basis to start with and on daily basis whenever required by BHEL.

PROJECT MILESTONES OF UNIT – 1

Milestone Description Schedule

Condenser Erection start OCT’08

Turbine Erection start DEC’08

Turbine Box up JUL’09

Oil flushing Start AUG’09

Barring Gear OCT’09

Synchronization OCT’09

Trial run DEC’09

PROJECT MILESTONES OF UNIT – 2 will have 3 months gap (lagging w.r.t. PROJECT MILESTONES OF UNIT – 1.

These programs would be amplified showing start of erection and subsequent activities and shall form the basis for site execution and detail monitoring. The three monthly rolling program with the first month's program being tentative based on the site condition would be prepared based on these programs. The contractor shall also be involved along with owner / BHEL to tie up detailed resources mobilisation plan over the period of time of the contract matching with the performance targets.

1.16.1 The program would be jointly finalised by the site in-charge of the contractor with BHEL/

owner's project co-ordinator as well as the site planning representative. The erection program will also identify the sequential erectable tonnages.

1.17 PROJECT MANAGEMENT

1.17.1 The successful bidder will have to establish computerised system to integrate with BHEL’s

existing system and requirement for Material management system and SOMS software system. 1.17.2 Still colour photography (matt paper, post card size max. 10 nos. per month of the contract

execution period) along with soft copies in CD depicting progress of the work, damage to the machine parts, if any, as directed by BHEL site engineer is to be arranged by the successful bidder at his own cost.

1.17.3 The successful bidder shall have to provide BHEL with all erection / work schedule (in a time

scaled L3 network showing details of work system wise and input required thereof) and/or progress report, protocol, test report in floppies / CDs (compatible to BHEL software) and also in requisite no of hard copies. The input and output data of all such schedule shall be furnished to BHEL in a manner compatible with software available at site.

1.17.4 The successful bidder will have to submit progress report every month in a decent and mutually

agreed format showing progress vis-à-vis schedule, delay, constraint (if any) etc to Site in charge and Project Manager positively by 7th of every month.

1.18 PROGRESS REPORTING 1.18.1 The contractor shall submit daily, weekly and monthly progress reports for manpower materials

reports, consumables (gases/electrodes) report and other reports as per pro-forma considered necessary by the Engineer.

1.18.2 The progress report shall indicate the progress achieved against planned with reasons

indicating delays, if any, and shall give the remedial actions which the contractor intends to take to make good the slippage or lost time, so that the slippage's do not accumulate and affect the overall program.

1.18.3 The daily manpower reports shall clearly indicate the manpower deployed, category-wise

specifying also the activities in which they are engaged. 1.18.4 Weekly progress review meetings will be held at site during which actual progress during the

week vis-à-vis scheduled program shall be discussed and actions to be taken for achieving targets will be decided. The program of subsequent week shall also be presented by contractor for discussions. The contractor shall constantly update/revise his work program to meet the overall requirement.

1.18.5 Periodic progress reviews on the entire activities of execution in respect of supply and works in

scope of bidder will be held once in a month at Calcutta/site. These meetings will be attended by reasonably higher officials of the contractor and will be used as a forum for discussing all areas where progress needs to be speeded up. The contractor shall be further responsible for ensuring that, suitable steps are taken to meet various targets decided upon such meetings.

1.18.6 In every month, the vendor has to record the progress status with the help of 10 nos. of “Site

progress Photos” and to submit the coloured photos of work progress with CD at the end of each every month.

1.19 DRAWING AND DOCUMENT 1.19.1 The detailed drawings, specifications available with BHEL engineers will also form part of this

tender specification. Revision of drawings/documents may take place due to various considerations as is normal in such large project. Work will have to be carried as per revised drawings/documents at no extra cost. These documents will be made available to the contractor during execution of the work at site. The contractor will also ensure availability of all drawings/documents at work place.

1.19.2 One set of necessary drawings/documents to carry out the erection work will be furnished to

the contractor by BHEL on loan which shall be returned to BHEL after completion of the work. Contractor’s personnel shall take care of these documents given to them.

1.19.3 The contractor shall maintain a record of all drawings and documents available with him in a

register as per format given by BHEL Engineer.

1.19.4 The data furnished in various sections and annexures enclosed with this tender specification describe the equipment to be installed, tested and commissioned under this specification briefly. However, the changes in the design and in quantity may be expected to occur as is usual in any such large scale of works. Contractor’s quoted rate shall be inclusive of the above factor.

1.19.5 If any error of ambiguity is discovered in the specification/information contained in the

documents drawings and tender, the contractor shall forthwith bring the same to the notice of BHEL before commencement of the work. BHEL’S interpretation in such cases will be final and binding on contractor.

1.19.6 Deviation from design dimensions should not exceed permissible limit. The contractor shall not

correct or alter any dimension details, without specific approval of BHEL. 1.19.7 Any deviation in the drawing may be permissive on getting approval from BHEL engineer and if

the work has been carried out on the basis of modified / deviated drawing, the vendor’s responsibility is to make “as built drawing” and to submit the same to BHEL. If this work is claimed in any RA bill, the vendor is to submit the related “As built drawing” along with the bill.

1.20 SOCIAL OBLIGATION It is imperative on the part of the contractor to join and effectively contribute in joint measures

such as tree plantation, environment protection, contributing towards social up-liftment, conversion of packing woods to school furniture, keeping good relation with local populace etc.

SECTION-II

2.1 TRANSFORMER, BUS DUCT, DG SET 2.1.1 Unloading of Generator Transformers and Station Transformers are included in the

scope of contractor. The contractor shall make arrangement to unload Generator Transformer and Station Transformer directly from the trailer [inside project premises] and shift the same to stores/place of work etc. as directed by Engineer. All necessary arrangements e.g. sleeper, jack winches etc. as required for unloading and shifting is to be made by the contractor. Payment for this shall be made as per the applicable item Rate of the Vol-III.

2.1.2 Civil works including drilling, chipping, enlarging cut-outs, foundation pockets, cable cut-outs,

grouting etc., wherever required will be carried out by contractor at no extra cost. Contractor will have to erect temporary scaffolding (scaffolding materials being arranged by vendor) for bus-duct erection and provide suitable platform at places (as desired by BHEL) for the purpose of inspection / testing by BHEL personnel.

2.1.3 During welding of supports with existing embedded insert plates are required, the vendor has to

chip on the wall for the insert plate. Also before grouting of equipment, the vendor has to chip the concrete to get the iron materials for welding of the equipment support. However, in any case, the insert plates are not found in position, the vendor may fix the insert plate by using anchor fastener (the plate being supplied by BHEL and the anchor fastener being in the scope of the vendor). The size of the fastener bolts may be communicated by BHEL at the time of requirement.

2.1.4 The panels may be supplied in detachable units housed in wooden case which will be opened

properly at the place of erection and will be placed on supports (base channels) leveled and aligned and subsequently fixed by welding / bolting as per drawing. The complete assembly, erection and connection of inter-panel wiring, bus-bars between adjacent panels, mounting of loose supplied component as per drawing will be the responsibility of the contractor. If any additional wiring or modification of wiring is required, the vendor has to carry out without any extra cost.

2.1.5 If necessary, dismantling, mounting, testing etc. of field instruments / devices, is under the

scope of work. 2.1.6 The contractor shall provide skilled aluminum welders with MIG aluminum welding sets and

welding materials inclusive of consumable. The Filler Aluminum alloy wire should be as per IS – 739/1977 and as specified in the BHEL standard, need to be supplied. Chemical and other test certificates of each wire roll should be furnished for acceptance of BHEL before use.

2.1.6 All the bus-bar bolted joints are to be tightened by torque wrench as per specified value (

Tentatively tightness being 20 Newton-Metre for 10mm bolt and 30 Newton-Metre for 12mm bolt for LT board and for SP/IP busduct the tightness being 36 Newton-Metre ). The contact surfaces of bus-bars, bus-bar bolts and nuts shall be thoroughly cleaned with petrol, petroleum jelly shall then be applied. These chemicals to be supplied by contractor free of cost. Special care shall be taken during erection to avoid damage to Zinc plated members of the structures. Any damage of the Zinc plated surface shall be made good by touch-up painting with cold galvanizing paint (to be supplied by the contractor as per specification of BHEL). The contact resistance is to be measured by micro-ohm meter which should be 10 Watt loss or less. However, if any changes in the specified value regarding tightness of bus bar joints and contact resistance may be intimated at the time of execution.

2.1.7 The measurement of contact resistance at the busbar joint is to be carried out by micro-ohm

meter (the provision being in the scope of vendor, the specification of which is given below : Ductor, Low resistance ohm meter, Make - Meggar Model - D007, Range (adjustable), 1) Range 0 - 100 micro ohm, 10 Amp, 2) Range 0 - 1 milliohm, 10 Amps, 3) Range 0 - 10 milliohm, 1 Amps, 4) Range 0 - 100 milliohm, 1Amps, 5) Range 0 - 1 ohm, 1 Amps, 6) Range 0 - 3 ohm, 0.1 Amps, Accuracy : 1% of full scale in all ranges, Battery : 20AH rechargable, Input Supply : 240V, 50Hz

2.1.8 Cables for wiring up to marshaling kiosk / fan control panel from associated equipment of transformers will be supplied by BHEL and cabling and termination etc. will be carried out by the contractor within the scope of this contract.

2.1.9 Cabling from bus-duct CTs to CT junction boxes will be in the scope of the contractor. The

contractor shall also erect, test (e.g. ratio, polarity, IR, winding resistance, magnetizing current / knee point voltage test ) and commission all the CTs integral to bus-duct.

2.2 Before mounting of all CTs in position, the tests for healthiness of all CTs e.g. Primary &

Secondary injection tests for all cores, magnetizing current/knee point voltage test, Secondary winding resistance measurement, continuity test, Polarity tests on each winding, Insulation resistance test on each winding by Megger to earth and between windings for all cores, are to carried out by the vendor.

2.3 Moreover, after wiring of the CTs to local JB / panels, the above testings are to carried out

again from JB / panel end without incurring any extra cost to ensure the wire connection of Current transformers.

2.3.6 During testing, if any descripancies are found, the vendor has to report the same immediately

to BHEL engineer. BHEL will arrange for repair of the same at the manufacturers’ workshop or other authorized repairing agency, but the vendor has to give all sorts of support e.g. loading of the materials, exit of the same through plant’s materials gate with duly entry by C.I.S.F.), transportation arrangement from erection site / stores to the transporters’ loading point / go-down located at MTPS site / Ranigunj / Durgapur / Bankura), and hand over of the same safely.

2.3.7 The fixing arrangement of CTs may need the holes enlargement, filing, and additional drilling of

the support for mismatch of the same with the main equipment. The vendor has to carry out on free of cost.

2.3.8 Transformer oil filling and Oil filtration : Handling of transformer oil drums issued to the

contractor shall be done with utmost care to avoid any damage or loss of oil. Provision of Oil filtration machine (recommended capacity 24KL/15KL/12KL per hour discharge along with simultaneous vacuum capacity of 1 Tor as per the requirement) and a Oil tank (recommended capacity 30 KL) is in the scope of vendor. Also the vendor has to provide one no. calibrated vacuum gauge of 1 Tor, two no. oil gauge glass and three number steel containers for collection of oil samples at the time of oil filtration. The filter machine should have the capacity of simultaneous filling of oil along with vacuum action. Other than the filter machine, if the vendor fails to bring the mandatory materials required for filtration, BHEL will arrange at the overhead cost of the vendor. Before filling oil in the transformer, oil shall be filtered separately in a tank of adequate capacity and suitable for the purpose ( to be supplied by the contractor ) by the contractor to meet proper dielectric strength, resistivity, acidity, moisture content etc. to the entire satisfaction of BHEL engineers at site. The transformer oil testing covers Electric Strength (Break down voltage) in rms KV, Moisture content ppm, Neutralisation Value (Total acidity) in mg KOH/gm, Dissolved gas Analysis, Interfacial Tension @ 27O C mN/m, Flush point O C, Dielectric Dissipation Factor (tan delta) @ 90 O C, pour point etc. The vendor’s responsibility to make the oil testing at authorized testing laboratory e.g. Power Grid Corporation, Durgapur / Central Power Research Institute, Kolkata.

2.3.9 The vendor has to carry out the above tests in each steps e.g. (1) Testing of oil before pouring of oil from auxiliary tank (approx. 30 KL arranged by vendor) to Main transformer tank, (2) Testing of oil before pouring of oil from auxiliary tank to OLTC, (3) Testing of oil before pouring of oil from auxiliary tank to Radiators, (4) Testing of oil before pouring of oil from auxiliary tank to Conservator tank via Main transformer tank. However, the repeated testing of oil may be at the discretion of BHEL / DVC.

2.3.10 The vendor should make the record of BDV value of each oil drum before and in between after the start of oil filtration.

2.3.11 For the distribution transformers / small power transformer, where the main tank is supplied

with oil filled in, the filtration can be carried out after the topping of oil to radiators, pipes etc. from oil drums. However, the oil testing of the drums before pouring is mandatory.

2.3.12 During filtration of Transformer Oil 2% of wastage is allowable and no charge will be recovered

for loss of this quantity of oil. However, any wastage beyond this 2%, will be chargeable and will be recovered at the rate of actual cost plus 30% overhead.

2.3.13 Erection of bushings and connections of internal terminals of transformer winding to bushing

terminals must be carried out with utmost care by competent technicians and supervisors. 2.3.14 At site, testing/calibration of all the meters / relays / thermal O/L relays, OTI, WTI including CT /

PT etc. are included in the scope, disconnection of components as required shall be done without extra cost. For calibration of OTI and WTI, the vendor has to arrange oil bath and calibrated standard thermometer.

2.3.15 Nitrogen gas pressure in all such transformers shipped without oil will be maintained by the

contractor without any extra cost. Nitrogen gas cylinders suitable for the purpose filled with gas will be arranged by the contractor. Records of gas pressure will be taken weekly or as per direction of BHEL and a log book will be maintained by the contractor till the transformer are filled with oil till the execution of work.

2.3.16 Proper records for glands and lugs if supplied loose with the equipments. However, if the same

are assembled with the equipments, the vendor is to dismantle the same before erection of the same and will be handed over for external and internal cabling or maintained by the contractor for reconciliation.

2.1.15 TRANSFORMERS: 2.1.15.1 The contractor will have to erect the fan and cooler control cabinet / marshalling kiosk for GTs,

UATs, UTs and STs along with other accessories that will be supplied loose and are the part of the transformers. Grounding resistors for transformer neutral are also to be erected.

2.1.15.2 Transformer Bushings are supplied loose. These are to be erected with utmost care under

BHEL supervision. Bushing CTs are to be tested for polarity, ratio, Insulation resistance, Dielectric Strength, Dissipation factor before erection. For testing of these bushings, the vendor has to supply or fabricate the bushing stand at free of cost. Cranes will be provided by BHEL free of cost for erection as required. After erection and charging of the transformer, if any leakage is found in the transformer body / bushings / pipes etc. the vendor has to repair the same without any extra cost and the vendor has to deploy the manpower round the clock, if the work is to carry out during shutdown.

2.1.15.3 Oil piping is to be erected separately along with conservator tanks, radiator banks. 2.1.15.4 Cabling ( Cable trays laying, glanding, laying of cables termination and lugging ) from Buchholz

relay, oil level gauge, sudden pressure relay, WTI, OTI, RTDs, Bushing CTs, Neutral CTs, Cooling fan motors, oil pumps to the marshaling kiosk are to be done by contractor. Cables, Cable trays, lugs will be supplied by BHEL.

2.1.15.5 The contractor will carry out following (but not limited to) tests at site as per applicable

standards, codes, manufacturer’s instructions, drawings, documents and subject to the approval.

Construction inspection. Hydraulic test for radiator banks and air tightness test for air seal of conservator tank. Drying out of transformer. Oil test of transformer oil. ( as per IS : 335 code ) Insulation resistance of winding test. Measurement of winding resistance at all taps Phase sequence check Voltage ratio test at all tap position Tap changing operation test Breather check for Silica Gel Zero-sequence test Neutral connection to earth effectively Polarity, magnetic balance test, magnetizing current at 415 Volt 3 phase and vector group

test. LV to HV winding ten-delta test after complete erection of bushings Low oil level for Main tank and OLTC tank Measurement of Zero sequence reactance Polarity and turns ratio test of bushing CTs.

Tan-delta test of Bushing insulators Alarm and trip test for Buchholz relay operation, Oil surge relay, PRV, MOG, SP relay, oil

level indicator. Cooling fans and pumps operation test. Calibration and testing of WTI & OTI, transducers, RTDs etc. and setting of mercury switch, . On load tap changer operation test for ST, stability for differential and restricted earth fault

test for GT, UT, UAT and ST. Scheme test, Pre-commissioning and commissioning of Cooler control cabinet, OLTC and

marshalling box All Remote operation from DCS and Relay panel Acoustic noise level Earthing of transformer body, NGR, marshalling box, OLTC cabinet Earthing of HV neutral to a separate earth pit

2.1.15.6 NEUTRAL GROUNDING RESISTOR : The transformer is equipped with a neutral grounding resistor whose secondary is connected across a resistor. Erection of NGR, HT cabling from transformer neutral terminal to NGR (XLPE cable and jointing kit is to be supplied by BHEL), control cabling of resistor and upto JB / TB / marshalling box associated for this item, HV test of the cables is included in this contract. The contractor will carry out following (but not limited to) tests at site as per applicable standards, codes, manufacturer’s instructions, drawings, documents and subject to the approval

Resistance measurement of NGR ( the vendor is to achieve the specified resistance value

as per factory test report ) Insulation resistance Space heater healthiness HV test of HT cable Tightness test Earhting of NGR

2.1.15.7 The breathers and associated piping supplied loose are to be erected by the contractor. The pipes may be supplied in running meters which are to be properly erected as per layout drawing. Necessary work like pipe fitting, threading / welding etc. including supply of all required pipes fittings elbows, socket bends, union reducers etc. are to be carried out by the contractor within his quoted rate. Necessary supporting arrangements are to be provided for installations of equipments and associated piping jobs by the contractor. Structural steel, if required for this shall be supplied by BHEL free of cost. First filling of breathers with SILICA – GEL after conditioning of the Silica Gel if required, is to be carried out by the contractor. Subsequent changes, if required, is also to be done by the contractor. SILICA – GEL for the purpose will be supplied by BHEL. The grouting of oil pipes, fan supports, supports of radiators, conservator tank and finishing of each foundation pedestal in the scope of vendor.

2.1.15.8 The oil testing of transformer is to carry out in phase wise. The oil is shifted in the auxiliary oil

tank from oil drums and after filtration, the oil is required to carry out the tests e.g. BDV, ppm, acidity, DGA etc. before pouring the same to main oil tank. After completion of oil filling to the main tank, the similar process i.e. tran shift from aux. oil tank to OLTC, radiator, conservator tank, piping etc. is to carry out and every time the tests is tobe carried out and after getting the satisfactory results, the oil pushing is allowable. Finally, the oil is to be tested, the details of which is mentioned in clause no 2.1.9.

2.1.16 ISOLATED PHASE BUS – DUCT (21 KV ) 2.1.16.1 The Isolated Phase Busduct is metal enclosed busduct in which each phase conductor is

enclosed by an individual metal housing and separated from adjacent conductor housing by an air space. Isolated phase busducts are of two basic types in general i.e. discontinuous and continuous. In conductor continuous Isolated phase busducts system, the various sections of the busducts are so inter connected that low resistance path for the induced circulating current is provided from one phase enclosure to other phase enclosure.

2.1.16.2 After final alignment followed by welding works, the vendor has to grout the duct support

(grouting materials being in the scope of the vendor and to supply as per BHEL recommendation). Also before grouting by the vendor as well as before floor finish work (being carried out by Civil vendor), the laying of earth flat from nearest riser, its welding and painting

(e.g. aluminium painting followed by primar as supplied by vendor) are in the scope of the vendor.

2.1.16.3 19,000 A bus-duct (made of aluminum alloy) meant for 21 KV system is being supplied by

BHEL, JHANSI. The bus-duct is having phase side and neutral side bus-bar chamber for generator phase and neutral side terminal bushings. It is having NGT (Neutral Grounding Transformer ) for generator neutral earthing, one SP/VT cubicle on generator phase side, bus-duct CTs, One no hot air blower ( common for two units ) silicagel breather, adopter box, seal off bushings, shunts, sun canopy over the bus enclosure outside the TG hall. The bus-bar is connected with the Generator as well as Generator Transformer by copper flexible. The bus-duct enclosure is made of aluminum alloy sheet and supplied in parts. The bus-duct is having three different sizes 1500 mm dia for Main, 780 mm dia for Tee-off and 1000 mm dia for Delta Bus duct. Bus-duct is supported on steel structure and shunts at different locations. Different sections of the enclosures are connected together by aluminum make up pieces welded at site. Various sections of the bus-bars are joined together by bolting and / or welding.

2.1.16.4 The bus-duct will be supplied with one no three phase bus-bar ( two pieces ) common for two

phase / three phase shorting during “SCC” test of generator the connection and dismantling of the bus-bar is in the scope of contract. After testing the loose bar as mentioned is to be returned to BHEL.

2.1.16.5 BUSBAR JOINTS OF IP BUSDUCTS : The busbar joints may be bolted type or welded type as

specified for installation. For making the busbar joints, the vendor strictly follow the specified procedures which will be communicated by BHEL engineer and precautions are to follow. Wire, brush, emery cloth or jointing compound containing metallic particles or other abrasive should not be used on plated surfaces.

2.1.16.5.1 To obtain the correct tightening pressure on contact surfaces the following torques are

recommended for various bolt sizes to conductors’ bolted joints.

SL NO BOLT SIZE RECOMMENDED TORQUE

1 M 10 2.80 TO 4.15 kg M 2 M12 4.15 TO 5.53 kg M 3 M16 5.53 TO 6.91 kg M 4 M20 6.91 TO 8.29 kg M

Alternatively tighten the nut till Belleville washer becomes flat. Then unscrew the nut by about 1-8th turn.

2.1.16.5.2 For enclosure window over bolted joint with neoprene gasket

For M10 bolt size, recommended torque size is 1.4 – 1.8 Kg M

2.1.16.5.3 For tightening of insulator with conductor For M20 bolt size, recommended torque size is 5.0 – 5.5 Kg M

2.1.16.5.4 For tightening of enclosure at terminations etc. with Nitrile bonded cork gaske

For M 12 bolt size, recommended torque is 2.0 – 2.5 Kg M For M 16 bolt size, recommended torque is 3.0 – 3.5 Kg M

2.1.16.6 Before putting the enclosure make up pieces (Welded to enclosure) & covers of inspection windows, all the insulators should be cleaned again. The busduct should also be cleaned and dried up for any moisture condensates. Thoroughly check the interior of every enclosure and ensure that these are free from any foreign material.

2.1.16.7 WELDING OF IP BUSDUCT: 2.1.16.7.1 Box section circumferential weld :

A fully penetrated, fully fused weld with a 10% T (4mm Max) reinforcement is required. The joint preparation with a permanent overlap is shown in the attached figure 4. In case of splice plate joints, please refer to figure 5 (generally on side of splice plates are welded at site)

Welding Conditions M.I.G. Process Filler wire : 1.6 mm dia (NG :21 with 5% silicon) Angle : 10O F to 15O F Cleaning : Degrease and scratch brush Setting : 250 A to 320 A, 28 to 30 Volts (Dependent on thickness) Process : 4 off 25 mm long equispaced tack weld Gas supply : 10 to 12 Lt./min argon Shield : 5/8” dia.

2.1.16.7.2 Tubular / Conductors weld:

Butt welding is done as per fig.6. Align and tack weld in four positions and complete the weld all around . Welding Conditions M.I.G. Process Filler wire : 1.6 mm dia (NG :21 with 5% silicon) Angle : 10O F to 15O F Cleaning : Degrease and scratch brush Setting : 215 A to 275 A, 22 to 23 Volts (Dependent on thickness) Process : 4 off 25 mm long equispaced tack weld Gas supply : 10 to 12 Lt./min argon Shield : 5/8” dia.

2.1.16.7.3 Enclosure : Circumferential Welds

Fillet weld for make up pieces / shunts after tack weld at four places. Ref. to fig. 7 for make up pieces and fig. 8 for shunt. Welding Conditions M.I.G. Process Filler wire : 1.6 mm dia (NG :21 with 5% silicon) Angle : 10O F to 15O F Cleaning : Degrease and scratch brush Setting : 200 A to 300 A, 25 to 30 Volts (Dependent on thickness) Process : 4 off 25 mm long equispaced tack weld Gas supply : 10 to 12 Lt./min argon Shield : 5/8” dia.

2.1.16.7.4 Welded Conductor Joints : Ensure that the “in position” conductor has been cleaned and

prepared for welding. If due to site variation, length of conductor was modified, re-prepare the ends for welding, in accordance with joining recommendations and drawings.

2.1.16.7.5 With the conductors in correct relative position and the permanent backing plates having a good fit, it is suggested that the conductors are clamped in alignment at top and button, by means of clamps made locally from channel section and on the sides by means of channels and large C-clamps. The clamping is particularly important where site joint is adjacent to an expansion joint.

2.1.16.7.6 Before welding check, once again that the joint faces and permanent backing bars are clean

from paint, grease and oxide film. Using asbestos cloth protect any insulator assembly close to the welded joint.

2.1.16.7.7 Due to cold start condition, the resultant bead contour or beginning of run may be poor with

inadequate penetration and porosity. This can be improved by striking the arc approximately on inch ahead of the beginning of the run and then quickly bring the arc to the weld starting point, reverse the direction of travel and proceed with normal welding. While finishing, a similar practice may be followed by reversing the direction of welding and simultaneously increasing the speed of welding to taper the width of the molten pool prior to breaking the arc.

2.1.16.7.8 The root run should be chipped back to sound metal and the start and finish chipped to a taper to allow smooth continuity of the root run on the remaining faces.

2.1.16.7.9 The root run requires a short arc to provide the desired penetration. A longer arc and higher arc

voltage may be used on subsequent filler passes. After welding. Remove any temporary packing, clean out busduct and make good any damage paint work.

2.1.16.7.10 Welded bus enclosure joint :

Bridge the gap between the bus enclosure by means of make up pieces and clean the area by paint remover (the cleaning agent being supplied by the vendor), which is to be welded. Tack weld the make up pieces before final weld all around.

2.1.16.7.11 Welded joints of shunts :

Various locations of shunts to be welded to the enclosures are shown in the layout drawing. Welding of shunts to the enclosures are shown in the fig. 8.

2.1.16.8 EARTHING OF ISOLATED BUSDUCT AND CUBICLES :

2.1.16.8.1 Earthing of Isolated Phase busduct :

One end of the electrical continuous enclosure should be earthed to station earth at the shunt location where all the three enclosures are shorted. Location of earth points are shown in the layout drawing. For this purpose, two drilling are to be done on the shunt to suit at site and two separate earth strips are to be connected to the station earth thus ensuring double earthing. In some assemblies (such as transformer hood etc.) due to short length enclosures shunts are not provided. In such cases, phase enclosure should be separately earthed.

2.1.16.8.2 Cubical Earthing : One end of the electrical continuous enclosure should be earthed to station earth at the shunt location where all the three enclosures are shorted. Location of earth points are shown in the layout drawing. For this purpose, two drilling are to be done on the shunt to suit at site and two separate earth strips are to be connected to the station earth thus ensuring double earthing. In some assemblies (such as transformer hood etc.) due to short length enclosures shunts are not provided. In such cases, phase enclosure should be separately earthed.

2.1.16.9 Site welding of Aluminum is to be done as per BHEL standard practice. For aluminium welding work (IP duct joints being Splice plate type welding joint and / or peripheral back tube type welding joint) of IP busduct and enclosures of SP busduct (if required), the vendor is to supply the aluminum welding machine, filler, argon gas and welding electrodes. The rate of erection of IP Duct is inclusive the provision of welding accessories including consumables also.

2.1.16.10 Each section of the bus-assembly is to be cleaned thoroughly before erection. The insulators

shall be properly cleaned with required chemical, Carbon tetra chloride and IP busduct conductor joints shall be properly cleaned with required chemical, Methyl Ethyl Ketone (the cleaning agent is to be supplied by the vendor on free of cost). Physical checking of busduct conductor, insulator and insulator support assly., initial meggering etc. before placement of duct and vendor should keeps the proper record before placement.

2.1.16.11 Vendor should ensure special care during assly., alignment of current transformers, epoxy

insulators, seal of bushings inside the IP duct before final tightening of hardwares. For hole matching of the above materials, it may be required to enlarge or minor shift of holes in the structure / aluminium conductor of IP Busduct. The vendor is to carry out the work without any extra cost.

2.1.16.12 TEST VOLTAGE :

The test voltage shall be applied between each phase and in turn with the remaining phases earthed. The test voltage shall be alternating current on any frequency between 25 Hz to 100 Hz and approximately in sine-wave form. The r.m.s. value shall be as given in table-1 below: For A.C. voltage, duration of test shall be one minute.

The test with D.C. at a voltage not in excess of the values given in Table-1, column 3 for the corresponding rated voltage may be substituted for the a.c. test prescribed. The duration of the test shall be 15 minutes. The corresponding test voltage as indicated in Table – 1 shall be applied in turn between each phase conductor and its enclosure which shall be kept at ground potential. Remaining two phase conductors and and their enclosure shall be properly grounded. The test voltage shall be increased by the measuring instrument. The full test voltage shall then be maintained for the specified duration. Each bus including tap-off must withstand the above voltage.

TABLE -1 TEST VOLTAGE AFTER ERECTION AT SITE

1 2 3Rated Voltage

Highest system voltage

KV KV KV3.6 16.8 16.8

7.2 21.6 21.6

12 28 28

17.5 30 30

24 44 44

36 60 60

Test voltage (a.c.) Test voltage (d.c.)

2.1.16.13 MEGGER CHECKS :

Before the application of high voltage check the insulation value of each bus conductor by means of 2.5 KV megger. A value of exceeding 100 mega ohms is expected under normal conditions. However, during rain seasons, the value may fall down considerably and drying up by hot air may be required before the test Minimum acceptable value is around 20 mega ohms. After the application of high voltage, the insulation value is checked again.

2.1.16.14 Handling during erection : The busducts are in un-packed condition, therefore great care is necessary in handling. Moreover, Aluminium being softer material, great care must be taken in handling enclosures and entire aluminium items.

2.1.16.14.1 While lifting enclosure assemblies, manila ropes are passed round the busduct enclosure near

the support channels. 2.1.16.14.2 All shipping steel clamps are tight and busbars do not slip out while handling, if the busbar is

assembled in the enclosure. While inserting and mounting the busbar in the enclosure care is taken that the bubar does not hit and damage the insulators.

2.1.16.14.3 During erection of IP duct, it may be required to transport the materials from store in advance.

During this period, the materials must not be laid directly on ground but stacked on wooden battens (if the wooden battens not available at site, vendor is to arrange from outside) to avoid contact with soil, water etc.

2.1.16.14.4 Items such as rubber components gaskets, insulation boards, busbar jointing compound,

insulating compound and Belleville spring washers etc. should be protected against dirt, dust, grease and moisture etc. Flexible connections made of thin aluminium or copper require

additional care to prevent physical damage. These connections should also be protected against dirt, dust, grease and moisture etc.

2.1.16.14.5 Doors of cubicles must always be closed during storage to avoid ingress of vermins dirt, dust,

grease and moisture etc. 2.1.16.14.6 Vendor should not stack busduct assly. packings one above the other, also avoid stacking of

heavier items on busduct packings. 2.1.16.14.7 The CTs, VTs, LA’s Capacitances, NG Transformers, Grounding resistors, insulators, bushings,

moulded and rubber items and flexibles are normally supplied in loose condition along with the main materials. Vendor should keep this materials in indoor and well ventilated area.

2.1.16.15 The opening of the TG wall through bus-duct enters the TG hall from GT is to be sealed by wall frame assly. completely to avoid rain entry.

2.1.16.16 The supporting structural fabrication and erection for the bus-duct and grouting of the structures

(after alignment and preferably after welding of duct) are also included in the scope of the contractor. The structures shall be assembled, aligned, grouted and are to be earthed through earth flat from nearest earth riser. Payment against this shall be made as per applicable item rate of Vol-III.

2.1.16.17 The successful contractor will be given details of welding procedure for executing the job. Before

starting the welding, the contractor’s qualified welder will have to demonstrate his ability to BHEL engineers by making sample welds. The contractor will engage the welders only after written clearance from BHEL after assessing the quality of the sample weld subject to various tests as per procedure of BHEL Test pieces for the testing welder performance will be supplied by the contractor. The consumption of welding rod should be inclusive in the price and the rate remains same independent of splice plate joint or back tube joint between two IP ducts

2.1.16.18 All the steel members are hot-dip galvanized. Adequate care is to be taken during erection as

mentioned elsewhere in the specification. Welding if required shall be touched up with red-oxide followed by cold galvanizing paint.

2.1.16.19 The shorting of busbars / flexibles, opening of the same for OCC and SCC of the Generator ,

and dry out of the Generator through IP Busduct is in the scope of vendor. Apart from this, any other checks / test mandatory as per Indian / International Standards / IE rules is to be carried out without any extra cost.

NEUTRAL GROUNDING TRANSFORMER : The Neutral side busduct emerging from top chamber is terminated to neutral grounding transformer whose secondary is connected across a Secondary Load Resistor, Erection, alignment, grouting of the base frame of NGT (grouting materials being in the scope of vendor), Assly. of space heaters with thermostat, Fluorescent tubes, Marshalling box, cabling of resistor and upto JB / TB / marshalling box associated for this item, assly. of CT, VT if any, space heaters, conduit wiring for illumination if any, internal wiring from equipment to JB, continuity test of the cables is included in this contract. Lightning arrestor, surge capacitor ( checking of connection to ground and line, continuity test, operation check of discharge counter, IR measurement by 5 KV megger), insulator NGT tests as per standard codes & practice.

2.1.16.20 Following tests of NGT are to be carried out.

Visual inspection Insulation resistance by 1 KV megger PI value by 5 KV megger Ratio test Magnetising current Contact resistance NGT resistance HV tests of HT cables Milli-volt drop test Limit switch healthiness illumination circuit check, space heater connection,

2.1.16.21 The bolt tightness of copper/aluminium flexible at Generator End (Top Chamber) and Generator Transformer should preferably be of 36 Newton-Metre. However, BHEL will confirm the specified value at the time of work and contact resistance is preferably 10 Watt loss. So vendor should arrange torque wrench well in advance.

2.1.16.22 SPVT CUBICLE : Placement, Levelling, alignment, grouting of cubicle (grouting materials

under the scope of vendor), Assly. of Voltage transformers, lightning arrestor, surge capacitance, HT fuses, space heaters with thermostats, fluorescent tubes, busbar adjustment for earthing, assly. of marshalling box, internal wiring, fixing of luminaries etc. Adjustment of draw out trolley of each VT cells with its locking system and secondary connections of each VT cells through terminals and fuses in the Marshalling box ( fixed in one of the cubicle) to the external equipments.

2.1.16.23 Checking voltage ratios on all windings, Primary & Secondary injection tests for all cores,

magnetizing current/knee point voltage test, Secondary winding resistance measurement, continuity test, Polarity tests on each winding, Insulation resistance test on each winding by Megger to earth and between windings for all cores, Tightness test of flexible with tap-off busduct, earthing contact during draw out of the PT module, Fuse healthiness check, illumination circuit check, space heater connection,

2.1.16.24 HOT AIR PRESSURISATION UNIT : Placement, Levelling, alignment, grouting of Hot air unit

(grouting materials under the scope of vendor), Piping of the blower line to and from IP Busduct assly. (Transformer end & Generator end), from Top Chamber, from NGT etc. with support, fittings etc., painting (primar is to be supplied by the vendor and touch up paint being supplied by BHEL) of the pipes and pipe support, Earthing of HAP unit, Assly. of the instruments and its calibration, red oxide primar painting, final painting of the pipes, pipe support and accessories ( only final paints being supplied by BHEL), Heater box, Commissioning of blower motor, compressor, commissioning of related panels (testing and setting of monitoring relays, wiring inside the panels being inclusive). The vendor is to ensure the air tightness of the air line on using consumables Teflon tapes, Jutes etc. during pre-commissioning and commissioning checks.

2.1.16.25 The vendor should complete the Hot air piping work at the entry and exit point at top chamber

side as well as Generator Transformer side before HV test of the duct in order to avoid the constraint piping work with charging of duct.

2.1.16.26 SITE TESTS

The following tests will be carried out by the contractor at site as per applicable standards, codes, manufacturer’s instructions, drawing and documents and subject to the approval and to the satisfaction of BHEL engineers.

Construction inspection. Welding joint check ( Dye-penetration and Radiography of each joint ). Conductor resistance test. Bolt torque check ( Tentatively tightness being 20 Newton-Metre for 10mm bolt and 30

Newton-Metre for 12mm bolt for LT board and for SP/IP busduct the tightness being 36 Newton-Metre ).

Inter cubicle and equipment wiring check. Cleaning of bus-ducts. IR test. HV test (all CT secondaries being shorted and grounded before HV test). Milli-volt drop test for bus bar joints (recommended 10 Watt loss per joint). CURRENT TRANSFORMERS : Primary & Secondary injection tests for all cores,

magnetizing current/knee point voltage test, Secondary winding resistance measurement, continuity test, Polarity tests on each winding, Insulation resistance test on each winding by Megger to earth and between windings for all cores,

POTENTIAL TRANSFORMERS : Checking voltage ratios on all windings, Primary &

Secondary injection tests for all cores, magnetizing current/knee point voltage test, Secondary winding resistance measurement, continuity test, Polarity tests on each winding, Insulation resistance test on each winding by Megger to earth and between windings for all cores,

Air tightness and water tightness test. Hot air blowing operational tests. Open circuit tests. Dry-out of generator through generator bus-duct.

The list of above tests to be carried out by the contractor is not exhaustive and they may have to carry out separate tests, which may be necessary for satisfactory completion of the job at no extra cost.

2.1.17. 11/3.3 KV SEGREGATED PHASE BUS – DUCT 2.1.17.1 11/3.3 KV Bus-ducts are phase segregated housed in rectangular enclosures. The bus-duct is

supported from the roof ceiling by tie rods and also by structural supports from ground. The following are the scope under 11/3.3 KV bus-duct.

2.1.17.2 The bus-duct is having suitable opening for bus-joints, transformer terminals, switch gear

terminals etc. The inspection covers are having sealing arrangement with neoprene gasket. Bus duct shall be joined by flange to flange bolting. The gasket may be supplied in loose sheet. So vendor has to make the gasket with proper hole match without incurring any additional cost.

2.1.17.3 Seal off bushings, silica gel breathers, filtered drains are provided at different locations. 2.1.17.4 Space heaters / hot air blowers have been provided to prevent moisture condensation inside

the bus-duct. Before placement of duct, vendor should ensure the healthiness of the insulators, conductors and space heaters. For that, initial megger of the duct, continuity test of space heater is to carry out as a part of check list of busduct erection. If any space heater (s) is / are required to replace even after placement of busduct, the vendor has to replace the same by new one (the new one being supplied by BHEL).

2.1.17.5 A separately run 50/6 mm G.S (or of suitable dimensions) flat suitably clamped along the

enclosures shall be used as the ground bus. All parts of the bus enclosures, supporting structures, equipment frames shall be connected to the ground bus.

2.1.17.6 All the steel members are hot-dip galvanized. Adequate care is to be taken during erection as

mentioned in 1.2.6. Welding if required shall be touched up with red-oxide followed by cold galvanizing paint.

2.1.17.7 In case of space heaters, GI conduiting, installation of JBs, cabling / wiring from Distribution

board to J. B. of individual bus ducts is in the scope of contract. Cable tray / conduiting work is also included in the scope of work . No separate payment shall be made against this.

2.1.17.8 The supporting structural erection for the bus-duct and grouting of the structures are also

included in the scope of the contractor. The structures shall be assembled, aligned grouted and are to be earthed. Payment against the same shall be as per the applicable item rate of Vol-III.

2.1.17.9 Following tests are to be carried out.

Visual inspection Insulation resistance HV tests Milli-volt drop test Water tightness test Any other test as specified by BHEL and repeat clause 1.2.16.9.

2.1.17.10 The list of above tests to be carried out by the contractor is not exhaustive and they may have

to carry out separate tests, which may be necessary for satisfactory completion of the job at no extra cost.

2.2.27 DRY TYPE LT TRANSFORMER 2.2.27.1 This is Resin Cast Air cooled housed in Enclosure, with all embedded temperature element and

associated controllers, temperature indicator cum switch. 2.2.27.2 Leveling & Alignment shall be under the scope of the contractor.

2.2.27.3 Removal, Calibration, Installation, Testing, Commissioning of Temperature Controller and

Switch shall be under the scope of the contractor for which the contractor shall not claim any extra cost separately.

2.2.27.4 Any loose component / busbars, neutral CT are to be assembled by the contractor without any

extra cost. 2.2.27.5 Following tests are to be carried out.

Visual inspection Insulation resistance Winding resistance with the help of micro-ohm meter Milli-volt drop test Water tightness test Phase sequence test No load voltage test Vector group and polarity Magnetising current check at 3 phase, 415volt 50 Hz power supply Magnetic balance test Continuity test Indication and alarm circuit alongwith door interlock switch. Physical line connection as per phasing diagram Neutral to earth connection effectively Tests on RTDs, CT Calibration temperature indicators, associated relays, switches Any other test as specified by BHEL and repeat clause 1.2.16.9.

2.2.28 LT BUSDUCTS 2.2.28.1 The busducts shall be supplied in parts and all the parts shall be assembled and the busbar

connections shall be made at site. The insulators in bus ducts shall be inspected for any possible damage during transit and the defective ones shall be replaced. The insulators and busbar joints shall be properly cleaned with required chemical (the cleaning agent is to be supplied by the vendor on free of cost). The contact surface of bus bars, bus bar bolts and nuts shall be thoroughly cleaned with petrol and wiped. Petroleum jelly shall then be applied and bolted connections made. The busduct enclosures shall be checked for earth continuity and then earthed at required points. The busduct shall be duly supported between the switchgear and transformer end. The opening in the wall where the busduct enters the switchgear room shall be completely sealed to avoid rain water entry. Expansion joints, flexible connections etc supplied by the manufacturer of the busduct shall be properly connected.

2.2.28.2 The vertical structures shall be assembled, aligned and grouted and the horizontal structures

shall be welded with the inserts made available as per the layout drawings. 2.2.28.3 The entire run of the busduct from the switchgear end upto the transformer shall be aligned and

erected as per the approved layout drawings and as per direction of BHEL site engineers to avoid any stress either on switchgear terminals or transformer terminals and the entire work is to be carried out only by competent and experienced manpower. Also, wherever bus duct is crossing through wall, it has to be erected with Bracket being supplied alongwith the bus duct.

2.2.28.4 All bolts in the joints will be tightened by torque wrench as per approved pressure and subject

to approval of the BHEL site engineer. Anti oxidation compound will be used for bolted joints and will be supplied by the contractor free of cost.

2.2.28.5 Erection of supporting structures supplied alongwith the busducts is to be done by the

contractor and payment shall be made as per the applicable item rate of Vol-III. 2.2.28.6 WELDING OF BUSDUCT CROSS-SECTIONS:

The successful contractor will be given details of welding procedure for executing the job. The contractor shall submit the names of qualified welders before start of job, giving particulars of experience. Each welder shall have to demonstrate his ability to BHEL by making sample welds. The contractor will engage these welders only after written clearance from BHEL after assessing the quality of the sample weld subject to visual, mechanical or metallurgical test.

2.2.28.7 The brief description and specification for LT, HT transformers, etc. as indicated above is

subject to change in respect of specification & description and contractor shall carry out work as per approved drawing / BHEL’s instruction.

2.2.29 VFD SYSTEM 2.2.29.1 BASIC LCI SYSTEM

The Load Commutated Inverter (LCI) / VFD system is static, adjustable frequency drive system that controls a synchronous machine from near zero to rated speed. The basic system consists of Isolation transformer, line commutated, phase controlled thyristor bridge converter, dc link reactor and thyristor bridge inverter.

The gating of thyristor bridge converter is controlled to produce a variable dc voltage at its output. The output of the rectifier is fed through the dc link reactor, whose function is to smooth the current and keep it continuous over the operating range of the system. The dc link reactor output is then fed into the inverter bridge, which provides variable frequency ac at the stator terminals of ID fan motor. The inverter bridge and the rectifier bridge use the same power hardware and are controlled by microprocessor-based electronic panel. A more general nomenclature is to call the line side bridge the source converter, and to call the machine side bridge the load converter. The synchronous motor field is usually excited by a brushless exciter coupled to the the motor shaft. The brushless exciter is a wound rotor induction machine whose rotor voltage, is rectified to supply field current to the synchronous machine. The stator voltage for the brushless exciter is supplied from a static excitation voltage controller included as part of the LCI control panel. This controller is gate / controlled entirely by the LCI control module. The LCI controls the excitation to produce the required machine flux and provides field over/under current protection.

2.2.29.2 Placement, leveling, alignment, grouting of the panels of following panels / modules, Cabling, Testing, commissioning of the system. 1) CONTROL & EXCITATION PANELS 2) FAN & FILTER CONTROL PANEL 3) THYRISTOR BRIDGE SOURCE CONVERTOR & LOAD INVERTOR 4) ADAPTOR PANEL 5) ELECTRONIC CONTROL PANEL 6) ON LOAD HT BREAKER 7) DC REACTOR 8) O & M PANEL 9) OUTGOING 415 VOLT LT PANEL, 10) AUX. ISOLATION TRANSFORMER, Vendor has to mobilize the following Instruments specially for commissioning of VFD system a) Dual Channel Oscilloscope with Storage Facility and B&C Probes (Oscilloscope shall be

used for observing all the waveforms and signals.) b) Current Probe c) Digital Multimeter d) Laptop PC with cables for connection to HPMG RS232 Port (supply in the scope of BHEL

unit)

2.2.29.3 GENERAL CHECKS

Verify the variable component values in the SEM (Small Electronic Module). Mark “L” for load NLIB (slot 1D) and “S” for source NLIB (slot 1C) both on card extractor and SEM frame. This is required since the values of the Variable Components may vary between Source Convertor & Load Invertor. This will avoid interchanging of cards during commissioning/ trouble shooting/ annual overhaul.

Inspect all components for loose hardware/ debris and remove any such material prior to applying power. Check tightness of all connections (busbars, wirings etc.). Special care to be taken for bridge fan, filter panels.

Inspect all stab connections in the equipment for tightness. Check power fuse micro switches are

firm on fuse.

Partially extract all PCBs from the SEM. Check ribbon cables, attenuator wires, busbars are segregated. Check clamps, sleeves are firmly in place. Check ribbon cable HV sleeves are firmly in place.

Check tightness of all busbars, cable connections crimping and connector terminations. Remove rear bolts on covers of equipment when inspecting.

Check clearances of external power cable termination. Check XLPE cable shield earthing.

Check clearance between discharge resistors connected across filter capacitor terminals and capacitor case. Leads of the resistor should be vertical for 3.3 KV, 4.1 KV channel and horizontal for 1.2 KV Channel.

Inter panel cabling and termination of VFD system, which are connected to LCI channel, Common

Control panel, Output VCB/ Contactor, DC Reactor , Transformers, Synchronous motor including heaters and lamp circuit.

Check Direction of the blowers (top and bottom) so that air should enter from the front of the bridge

panel and leave the top of blower panel. Check changeover of blower when running blower trips. To check electronic control card, partially extract all the cards in the electronic modules., Switch on

control supply at PSFF, Measure the following voltages w.r.t. ground:

EARTHING OF VFD SYSTEM : Ensure that both ends of the ground bus of LCI channel are earthed. Ensure Inter panel jumpers between earth bus at rear are present and are connected firmly. Earthing of the LCI channel to the earthing flats at both ends of LCI channel is extremely important. If it is not possible to earth LCI channel at two ends to earthing flat, make a jumper connection to the adjacent panels earth bus with a cable of minimum size 95 sq mm aluminium. Ensure that the adjacent panels earth busses are firmly connected to earthing flat.

2.2.29.4 PRE-COMMISSIONING & COMMISSIONING TEST

The pre-commissioning & commissioning test are to comply by the vendor. The format for recording test results and FQP will be furnished by BHEL during execution of the work.

MEGGER TEST :

Disconnect the ribbon cable to each HPTK card in the converter leg module. Disconnect the ground connection to the HPTK and XPTN cards in each leg module. Disconnect the load bridge filter neutral ground in the fan compartment ( 3.3 & 4.1 KV LCI) or ac

output panel ( 1.2 KV LCI) Confirm that both the source and load breakers (contactors) are open. Temporarily jumper together source side buses AC1, AC2, AC3; DC buses P1, P2, N1, N2 and

load buses M1, M2, M3. All busses should now be tied together. Megger from any bus to ground using 1000 Volt (or higher) Megger. For 3.3 KV

Channel restrict to 1 KV megger. (IR value should be >100 MΩ.) Remove jumpers and reconnect the ribbons and chassis grounds. Reconnect the load ac filter

ground. Jumper the load side interrupter output terminals together and megger w.r.t. ground. (value

>100 MΩ). Then remove jumpers.

CONTINUITY TEST across cells PRE-COMMISSIONING CHECKS OF auxiliary A C Power supply,

Open the electronic power supply MCCB. Check the incoming 3-Φ, 415 V supply. Close the control supply MCCB. Close the blower supply MCCB.

Check Direction of the blowers (top and bottom) is OK. Air should enter from the front of the bridge panel and leave the top of blower panel. Check

changeover of blower, when running blower trips.

SIGNAL INPUT POWER SUPPLY CHECK

ELECTRONIC POWER SUPPLY CHECK

Partially extract all the cards in the electronic modules. Switch on control supply at PSFF. Measure the following voltages w.r.t. ground

GATING POWER SUPPLY( for 2.3 KV & 4.1 KV LCI only) CHECK

SOFTWARE ADJUSTMENTS/ ELECTRONIC MODULE INITIALIZATION

Turn off the electronic power supply and check that PROMS are installed in the HMPG/ DMPB (2F)

Re-insert HMPG/ DMPB and power off the electronic module. the bus hog LED on the HMPG may come. This is normal until EEPROM is properly initialized.

Initialize the SEM electronics module using the procedure given in the commissioning instructions.

Check if the terminal (Laptop PC) is programmed. There will be a sticker / note on or inside the Laptop PC with the name of the project and operating instructions.

Ensure without fail that the ground terminal of the interface cable is connected to ground (Tinned Copper cable braid between SEM and panel aluminium extrusion) before connecting either end of the interface cable.

Read the instructions for operation carefully. Attempt to communicate with HMPG through the laptop PC.

Verify the tune up values. Compare these values to those given in the system elementary sheets 1DE- 1DG. Using Modify command, update tune ups, and execute a SAVE command. Turn off the WREN switch and reset the processor.

FINAL TUNE UP SELF TEST

Switch on the test switch at NLCB.Reset HMPG by jumpering TP1 (RST) to TP2 (DCOM) momentarily.

This is to be repeated till all the results are passed.

POT ADJUSTMENT

Measure and set the voltage for all the OV, SUPP, RTD, UVR, and OSP

BRIDGE CURRENT FEEDBACK CALIBRATION ( 3.3 KV & 4.1 KV LCI) CHECK

Verify resistors and Berg jumpers on the XTFH against system elementary sheet. Remove CT lead plug JR and JT from XTFH. Measure the resistance across each of the burden resistors on the XTFH; it should equal the “R BURDEN SETTING” value as per the elementary (IEA). Adjust the corresponding pot to fine tune. Reconnect plug JR (for source) and JT (for load). Note that the burden has already been adjusted in the factory during testing. Lead resistance of meter to be taken into consideration if pot is adjusted.

GATE TEST

The gate test mode allows OFF-LINE testing of much of the analog signal conditioning, microprocessor firing control, and gate pulse generation circuitry. In the gate test mode, a local test oscillator supplies 3 phase, approx 55 Hz signals in place of attenuated bus signals from the source and local bridges. The electronic control can then locks into this signals and generate signals to dry fire the thyristors in both the bridges. Thyristor gate pulses may then be examined for proper magnitude and phasing.

SOURCE NO LOAD FULL VOLTAGE TESTS

Verify that SWGR relay on the I/O module will trip the incoming switchgear in the event a fault is

detected by the control.

Apply the control power, reset the SEM, and check that the IMOK LEDs are on. Check for any fault indications. Investigate and clear any indicated fault.

SOURCE VOLTAGE SIGNAL PHASING AND BALANCING

Close source side circuit interrupter. Observe that source side bridge neon lamps are illuminated.

Connect an oscilloscope to simultaneously observe the waveforms on the points TP7 (VBA), TP8 (VCB) and TP9 (VAC) on the NSFC (2C). Confirm that the phase sequence is 1-2-3 and that all these are approximately equal. (VBA leads VCB leads VAC)

SOURCE UNDER VOLTAGE DETECTION SOURCE OVER VOLTAGE DETECTION

LOAD TESTS USING VOLTAGE SIGNALS FROM SOURCE SIDE BRIDGE

Trip source circuit interrupter. Disconnect ribbon cable JA from NSFC- 2B. Move the ribbon cable JA from NSFC- 2C to NSFC- 2B. Connect a test jumper from back plane pins 1C- 55 to 1C- 1(if necessary) to disable source

under voltage trip.

LOAD SIDE SIGNAL PHASING AND BALANCE

Close source circuit breaker. Connect an oscilloscope to simultaneously observe the waveforms on the points TP7 (VBA),

TP8 (VCB) and TP9 (VAC) on the NSFC (2B). Confirm that the phase sequence is 1-2-3 and that all these are approximately equal. (VBA leads

VCB leads VAC) Check PHASE SEQUENCE

LOAD OVER VOLTAGE DETECTION CHECK MOTOR SPEED SIGNAL CHECK

MOTOR SPEED INDICATIONS CHECK

MOTOR VOLTAGE INDICATION CHECK

OVER SPEED SETTING CHECK

EXCITATION TESTS

These tests verify the operation of the exciter voltage controller (EVC). Verify the burden resistors on the NHVL board in the EVC are as per the elementary sheet 1EA.

PHASE SEQUENCE CHECK

Apply power to the source bridge and to the EVC input terminal. Connect an oscilloscope to observe simultaneously the waveforms on the test points ATTEN- A1

(TP1), ATTEN- B1 (TP3), ATTEN- C1 (TP5) on the NHVL board. Confirm the phase sequence is 1-2-3 and that all three signals are balanced. With power on the source bridge, use an oscilloscope to compare source VAC (TP9-2C) against

EVCL- VAC (TP9-2A). Measure the number of degrees VAC (TP9-2C) leads or lags VAC (TP9-2A). Record this value

and save into tune up setting FANGLAG.

EVC POWER TEST

Apply source bridge power and EVC input power. Attach a voltmeter across one phase of the exciter output. Attach a clamp on ammeter around one phase of the Exciter output. Select LOCAL operation and set the local reference pot to minimum.

Open the Flux regulator and select EVC test mode by setting tune up SQFEC to 2. The EVC firing is now controlled by local speed pot. Using the local speed pot increase the exciter current to max allowable exciter current feedback

at test point IFB-2A read as follows. Reduce exciter current to zero and modify SQFEC back original value. Normalize flux regulator.

CROW BAR TEST:

The crowbar test permits controllable DC link current to be circulated without involving the motor windings. On the load side the DC current circulated through one or more diametric cell pairs by passing the motor. The signals to be observed on the oscilloscope will indicate, whether source side CTs are phased correctly. If the CTs are not phased correctly, reverse the CT lead connections at the CT terminals or any other convenient point in the CT feedback Ckt. Note that in crowbar test, there will not be any current though the load side CTs. In a successful crowbar test, there should not be any deflection on the motor voltmeter on the panel.

DECOUPLED MOTOR TRIAL RUN

Ensure motor bearing protection i.e., bearing vibration and bearing temperature is made

available. Modify the following EEPROM variables. Aux. Control and exciter power are made ON. Blower is made ON. Source breaker is made ON. Load breaker is kept in service and dc control is made ON. Select local speed reference and set it to min. Note that all permissive must be satisfied. Initiate run from the local control station by depressing START push button. Note that the value of flux at rated speed is 0.5. Therefore motor voltage should be ½ the rated

voltage at rated speed. Cross check this from motor voltmeter on Panel and also on VCB/ Contactor panel. This will ensure that the load side flux adjustment on NLIB Load is correct.

Motor should start and begin accelerating and run to minimum speed. Check CT Phasing on NLIB load side. Procedure and correction ( if reqd.) as in crowbar test

given earlier in this document. Monitor LMODE changes on DA1-2E while the drive is accelerating to minimum speed. Display LMODE on terminal. Check it changes from 0 to 1 to 2 to 3. Control the motor speed with the speed pot and verify that the speed follows the reference. With the motor running, check that the current and gating signals for the load. Check signals on

NSFC-2B and NLIB-1D. Check motor voltage follows the flux profile. The voltage will rise linearly with speed, with ½

rated motor voltages at rated speed. Initiate stop from the local control station and the motor should coast to a stop. Record the

coastal time. To ascertain that the brushless exciter stator connections are correctly done, record the

uncoupled run readings of the exciter current and voltage at various speeds. Thereafter take another trial with exciter R & Y leads interchanged at motor. The connections that give lower exciter stator current for the same speed is the correct connection.

TRIAL RUN OF MOTOR IN DE-COUPLED CONDITION WITH CH-1 ONLY IN SERVICE

TRIAL RUN OF MOTOR IN DE-COUPLED CONDITION WITH BOTH CHANNELS IN SERVICE

All the tune up values has been normalized for motor coupled trial run after the completion of decouple trial run.

TRIAL RUN OF MOTOR IN COUPLED CONDITION WITH BOTH THE CHANNELS IN SERVICE.

2.2.30 SCHEDULE OF SITE TESTS

2.2.30.1.1 Site testing shall be required for all electrical equipment installed by contractor to ensure proper

installations, setting, connection and functioning in accordance with drawings, specification, manufacturer’s recommendations and approved quality plan for installation, testing & commissioning.

2.2.30.1.2 The contractor shall take full responsibility for satisfactory testing, pre-commissioning, commissioning and trial run of the connected equipment under overall guidance of BHEL and shall locate any cause of malfunction and shall make the necessary minor wiring changes or cable connections to obtain the intended operation. Testing shall also include any additional tests which the engineer deems necessary because of site conditions to determine that equipment, material and system meets requirement of the specification. The following are some of the major site tests. Checking shall be done on all circuits & modules and not as a typical checking in sample basis.

2.2.30.1.3 The contractor shall deploy special commissioning agency for commissioning of the Equipments

/ Systems under the scope of this contract. This agency will be responsible for mobilizing all T&P etc. as required for successful commissioning of the Equipments / Systems under the scope of this contract and shall carry out all necessary pre-commissioning and commissioning checks / tests. Contractor shall obtain prior approval on such agency from BHEL site before deployment. No separate amount will be paid for such deployment. The quoted rate shall be deemed to be inclusive of this cost.

2.2.31 Checks after erection : checks shall be carried out not limited to following details. A) BUSDUCT

General arrangement of various sections as per drawing. Busbar joints between various sections use of bimetal / flexible joints as per drawings.

Tightness of busbar joints and end terminations, tentatively tightness being 36 Newton-Metre and recommended 10 Watt loss per joint).

Tightness of nut connecting intersection flanges and covers. Busduct supports as per drawings.

B) TRANSFORMER

Construction inspection. Hydraulic test for radiator banks and air tightness test for air seal of conservator tank. Drying out of transformer. Oil test of transformer oil. ( as per IS : 335 code ) Insulation resistance test. Polarity, Turns ratio and vector group test. Polarity and turns ratio test of bushing CTs. Alarm and trip test for Buchholz relay, SP relay, oil level indicator. Cooling fans and pumps operation test. Calibration and testing of WTI & OTI. On load tap changer operation test for ST, stability of differential and restricted earth fault test for GT, UAT and ST.

2.2.31.1 Special check for busduct

Cleanliness of busbar, supports etc. Earth & insulation resistance Measurement of contact resistance HV test.

2.2.31.2 Commissioning checks

Power cable connection for tightness & phase sequence test Energisation by closing I/C breaker Control circuit operation of each starter module Verification of timer settings Verification of bus zone protection, bus transfer & auto re-closing. Energisation of power circuit of each module & operating motors on no load Checking operation from local push button station, switchgear and remote (CR), with and

without all interlocks. 2.2.31.3 The list of above tests to be carried out by the contractor is not exhaustive and they may have

to carry out separate tests which may be necessary for satisfactory completion of the job, at no extra cost.

2.2.32 DG SETS (2500 KVA)

The contractor will have to erect three no. 2500 KVA DG sets alongwith Accoustic enclosure, Fuel tank, its level controller, radiator float switch, fuel oil piping, exhaust piping, Installation of Generator terminal adaptor, Current transformer, instruments, Power JB, Control JB, AMF panels, Batteries, Tray support, Cable Tray (cable tray & tray support being within the DG package only) etc. The same shall be erected including cleaning of radiator tubes (cleaning agent to be supplied by BHEL), cleaning of fuel pipes &, lub. oil pipes, replacement of engine oil and its filter, lub. oil filter, super lub. oil filter, radiator coolant before commissioning ( Engine oil & its filter, lub. oil filter, coolant being supplied by BHEL), Acid pouring to the batteries, which are supplied with DG set package, 1st charging of the same by the charger ( Acid arrangement and charger to be provided by vendor). The plant charger cannot be utilized for battery charging, and the battery specification will be intimated by BHEL engineers' instruction, Mounting of current transformers & assly. of busbars inside the terminal box adaptor, Cabling, earthing, etc. The pre-commissioning and commissioning of DG set is to carry out under the guidance of authorised dealers’ service engineer. The charge for service engineer is provided by BHEL, but for assisting the commissioning work, the vendor has to supply T & Ps and consumables along with deployment of their engineer. Also, the arrangement of accommodation, transportation etc. of the service engineers are the vendor’s responsibility. For testing, commissioning, trial run and handing over, procurement of Diesel from BHEL authorized petrol pump, handling, transportation and filling in various stages including arrangement of container is in the scope of vendor. BHEL will reimburse the cost of diesel on submission of the bill of Petrol pump. For fabrication and erection of supporting structure for the DG set, payment shall be made as per the applicable item rate of the Vol-III. For cabling of the DG set, the same is included in the scope of work. However, no separate payment shall be made for the same.

2.2.33 PANELS : Making base frame / foundation frames / support frame or structure as per drg. / Procedures, Painting of the supports, base channels, Placement, leveling, alignment of the items / panels, fixing its base of the items to foundation / frames by fasteners, welding as per drg. / Procedure mentioned in field quality plan and erection manuals. Red oxide primer and finishing paint as per BHEL approved shade and grade is to be applied on the structures / foundation frames / support frames in this contract. All internal or external wiring, cabling, fixing of Current Transformers, Voltage Transformers, relays, meters, sensors (which are supplied with materials in loose condition), are to installed in the panels with appropriate fixing supports etc. as per the instruction of BHEL. Earthing of the panels by GI flat, flexible wire from the nearest earth pit / point, External cabling, tray fixation is in the scope of the contract. Foe testing of Generator and DG set as well as panels, the testing protection & metering relays, Numerical relays (Omicron relay kit if required, is to be provided by vendor), Functional & stability tests, OCC & SCC, Auto synchronization, Auto close on main power failure (for DG only), interlock with other incomer breaker / buscoupler, Sequnetial operation, Auto start and auto trip of pre-lub. oil pump (DG only), Auto start and auto trip of DG set, interlock protection check, Stability tests, Current Transformers (only testing of CT before mounting & testing with wires from panels), Voltage Transformers, sensors, RTDs, etc., are in the scope of the vendor.

2.2.34 FINAL PAINTING Final painting is excluded from the scope. Only Touch up painting, as required, is in the scope

of contract. Supply of touch up paint (both primer and final Paints) is under the scope of work. However, Paint has to be as per BHEL’s specification. Nomenclature of the erected item is to be done as per BHEL / DVC requirement.

SECTION III 3.1 TIME SCHEDULE : 3.1.1 The entire work of erection, testing and commissioning, upto handing over of the entire scope

of work shall be completed within 15 months from the date of LOI. 3.1.2 The contractor shall mobilize resources for start of work within 15 days of LOI / Clearance from

site. A bar chart showing schedule of various milestones like start of erection of Generator

transformer, Station Transformer, Unit Transformer, Converter Transformers, UATs, Bus ducts, DG set, their commissioning, etc. linking with various project milestones as detailed in this specification etc., is to be submitted by the contractor before start of work, to site-in-charge, BHEL Mejia site for approval.

3.1.3 Compensation for Delay : Compensation for Delay (penalty) shall be effected for the scope of

work under this tender based on delay attributable to contractor.

If the contractor fails to complete the job as per Completion Period under above Clause No. 3.1.1, he shall, without prejudice to any other right or remedy of BHEL on account of such breach, pay compensation (penalty) to BHEL. The above agreed compensation shall be a penalty equivalent to 1/4 % (one fourth percent) of the contract price excluding elements of taxes, duties etc. if any, per week or part thereof of the delay subject to a maximum of 5% (Five percent) of the executed contract price excluding elements of taxes, duties etc.

3.1.4 Front for erection of transformers, bus ducts, DG set etc. will be made available in a phased manner.

3.1.5 In order to analyse the delay in work progress for BHEL’ s account or vendor accounts, the

vendor has to make a Monthly joint report / Minutes of meeting stating the feasibility of the work fronts and further planning of the work.

3.2 ELECTRICAL INSPECTOR’S APPROVAL AND POLLUTION CONTROL BOARD

CLEARANCE The contractor shall arrange to obtain clearance from the Electrical Inspectorate (CEA) and

Pollution Control Board and arrange for the Authorities’ visit to site, as required. He will also arrange visit of electrical Inspector and obtain his approval for the installation work to be carried out under this scope of work and get the work done by the license holder electricians and supervisors as per local statutory requirement. The statutory fee paid by BHEL.

3.3 RATES / PRICES 3.3.1 The bidder shall quote their prices as per Vol-III rate schedule only. 3.3.2 The quantities/weights/dimension etc. mentioned in weight schedule (Annexure–I) is tentative

and approximate only and given to facilitate the contractor to make assessment of the magnitude of work under this specification. These are liable to variations as per design consideration.

3.3.3 The quantities indicated in the schedule are approximate and liable to variation as per the

discretion of BHEL. The quoted / accepted unit rate shall be applicable for any additional quantity also, if included at a later date. The quoted rate shall remain firm for + / - 30% ( plus minus thirty percentage) variation in total awarded value.

3.4 DELETED: 3.5 PRICE VARIATION CLAUSE:- 3.5.1 As per ANNEXURE - A.

3.6 MOBILISATION ADVANCE No mobilisation advance is payable under this contract. 3.7 Terms of Payment 3.7.1 The tenderer shall quote separate rates as required therein for each of the categories of work in

the rate schedule. 3.7.2 The bidder shall submit his running bill once in a month at the end of each month in line with

billing schedule indicated in Annexure-V. The RA bill complete in all respects accompanied by BHEL engineer’s certified / measurement sheet, protocols jointly signed by DVC and BHEL and EPF compliance certificate from EPF authority, reconciliation statement up to the month of billing, as built drawing (if the claim being against the work on the basis of modified drawing), will be paid within 30 days of submission of the bill. The measurement will be taken as specified in terms and conditions of contract and certified by the BHEL engineer of actual work. However no extra payment shall be made in the event of delay in release of payment within 30 days.

3.7.3 Out of above break-up for progressive payment, 5% will be retained from each RA bill, which

will be released on completion of guarantee period of 12 months. However, this 5 % payment can be released against submission of performance bank guarantee valid for the guarantee period as stated above in prescribed proforma subject to receipt of certificate that all works are completed in all respects. The submission of bank guarantee towards performance guarantee is separate and the bank guarantee towards security deposit cannot be utilised for this purpose. The security deposit will be refunded as per GCC.

3.7.4 Out of this 95% RA bill, 1.5 % shall be released for payment against each RA bill in the

following manner on certification by BHEL engineer after compliance of each of following activity in each month. In case of non-fulfilment of respective activity by vendor in each month, no payment shall be made by BHEL against corresponding activity and no claim of bidder at a later date, whatsoever, in this regard shall be entertained by BHEL.

3.7.4.1 0.7 % shall be paid on compliance of house keeping of vendor’s working area and store/

office areas. 3.7.4.2 0.3 % shall be paid on compliance of general illumination of vendor’s working area and

stores, office area. 3.7.4.3 0.2 % shall be paid on compliance of applicable OHSAS requirement as per guidelines of

BHEL/ PSER and as specified in the tender. 3.7.4.4 0.3 % shall be paid on compliance of applicable Safety requirement as per guidelines of

BHEL/ PSER and as specified in the tender 3.7.5 Subject to any deduction which BHEL may be authorised to make under the contract, the

contractor shall on the certification of the BHEL engineer at site, be entitled to receive payment as explained hereunder.

3.7.6 For erection, testing and commissioning of Transformers, bus ducts, DG set etc. as described

in tender document, progressive payments shall be made as per the billing schedule given in Annexure-V, on the basis of contract price as per rate schedule. (These percentages are only for the purpose of progressive payments and should not be considered as price of individual items and vendor should complete all the work without quoting reference to the break up).

3.7.7 BHEL at their discretion may further split up the percentages indicated in billing schedule

indicated in Annexure-V and effect monthly payment in consideration of site conditions, cash flow requirement etc. according to the progress of work. However, such split will be finalized before start of work.

3.8 PAYING AUTHORITY

Construction Manager, BHEL site office, Mejia TPS, PO – MTPS, Dist - Bankura, West Bengal

Any change of above shall be intimated to the contractor accordingly. 3.9 OVER RUN CHARGES (ORC)

As per Annexure –B. 3.10 EXTRA CHARGES FOR RECTIFICATION/MODIFICATION 3.10.1 Any modification, rework requires to be done for the reasons attributable to the contractor will

be carried out by the contractor free of cost. 3.10.2 All rectification/modifications and reworks required for any reasons not due to fault of the

contractor on works already completed, which require less than or up to 50 man hours shall be considered as minor and shall be carried by the contractor free of cost.

3.10.3 BHEL may consider payment for extra works on man hour basis for such of those works which

require major revamping / rework, which is totally unusual to normal erection or commissioning work and are not due to contractor’s faulty erection. The decision of BHEL in this regard shall be final and binding on the contractor. The contractor may submit his extra claim bills (specifically agreed by BHEL Engineer) along with the labour sheet duly certified by BHEL Engineer at site. But BHEL has also got the option to get these works done through other agencies, if they so desire.

Any extra work which require more than 50 man hour ( say for 150 man hours of extra work for a particular job , then extra man hours will be considered for admission of extra work will be (150-50) manhrs, i.e. 100 manhrs. In this extra job subject to acceptance by the BHEL site engineer).

All the extra work, if any, carried should be done by a separate gang which should be identified

prior to start of work for certification of man hours. Daily labour sheets should be maintained and should be signed by contractor’s representative and BHEL engineer on the day of work or within a period of 2/3 days. The delay in making daily labour sheet after a lapse of more than one day will not be considered and BHEL will not be in any way responsible for releasing certificate of actual deployment of additional manpower. Signing of labour sheet does not necessarily mean the acceptance of extra work. Only those works which are identified as not usual to normal erection and certified so by the construction manager, will be considered for payment.

3.10.4 The decision of BHEL in this regard shall be final and binding on the contractor.

3.10.5 Extra work rate

The following man-hour rates will be applicable for modification/ rectification work, excluding

pressure part joints. Average single man-hr rates including overtime, if any, supervision, use of tools & tackles and

other site expenses and incidentals including consumbales for carrying out rework / revamping as certified by site as may arise during the course of erection testing and commissioning – Rs 30.00 per manhour.

Average single man-hr rates including overtime, if any, supervision, use of tools & tackles and

other site expenses and incidentals excluding consumables for carrying out rework / revamping as certified by site as may arise during the course of erection testing and commissioning – Rs 25.00 per manhour.

NOTE: The above man-hour rates towards extra work shall be firm and not subject to any

variation during execution of the work. 3.10.6 No PVC, rate revision, over run charges / compensation is applicable for extra works. 3.11 GUARANTEE

3.11.1 Even though the work will be carried under supervision of BHEL engineers, contractor will be responsible for the quality of the workmanship and shall guarantee the work done for a period of 12 months from the date of start of Guarantee period, as certified by the engineer for good workmanship and shall rectify free of cost all defects due to faulty erection. In case contractor fails to repair the defective works within the time specified by engineer, BHEL may proceed to undertake the repairs of such defective works at contractor's risk and cost without prejudice to any other rights and recover the same from SD / other dues.

3.11.2 The guarantee period will commence from the date of handing over of both the units to customer

or six months after completion of full load operation of both the unit whichever is earlier, provided, all erection, testing and commissioning works are completed in all respect for both the units.

3.12 TAXES AND DUTIES

A) TDS under Income Tax, , shall be deducted at prevailing rates on Gross Invoice Value from the

Running Bills unless Exemption Certificate from the Appropriate Authority/ Authorities isfurnished.

All taxes ( except Service Tax including Educational Cess and other Cess , if any ) , charges,royalties, duties, Octroi , any State or Central Levy and other Taxes for materials obtained for thework and for the Execution of the Contract shall be borne by the Contractor and shall not be payable extra during the tenure of the Contract .. However, submission of Tax Invoice is a mustalong with the RA Bills .

The Contractor has to make his own arrangement at his cost for completing theformalities , if required , with State V.A.T. Act Authorities , for bringing theirmaterials , plants and machinery at Site . Road Permit / Way Bill , if required, shall bearranged by the Contractor and BHEL-P.S.E.R will not supply any Road Permit/Way Bill for this purpose. The Contractor must be a Registered Dealer with the State VATAct, if not Registered yet and a copy of the said Registration Certificate along withTIN Number must be provided to Site R.A.O.

SERVICE TAX : Service Tax as legally leviable & payable by the Contractor under “ Erection, CommissioningInstallation Services “ of Service Tax Law/Act vide Sec 65 (105)( zzd) , shall be

paid by BHEL-P.S.E.R on Contractor’s Gross Bill. However, Contractor shall have to submit proof of Service Tax deposited by them immediately after the deposit but not later than the next Bill submitted after the due date of deposit . The Contractor shall furnish proof of Service Tax registration with Central Excise Division covering the Services under this Contract. Registration should also bear endorsement for the premises from where the billing shall be done by the Contractor on B.H.E.L-P.S.E.R for this ProjectContractor shall obtain prior approval of BHEL-P.S.E.R if there is any change in the

above provision . B.H.E.L-P.S.E.R will not be held to be responsible for non-compliance of various Service Tax Rules, being framed from time to time

With introduction of Cenvat Credit Rules , 2004 which came into force w.e.f 10.09.2004, excise duty paid on Input Goods including Capital Goods used for providing the output service and service tax paid on Input Service can be taken credit of against the servicpayable on output service . As such, while offering the rates , the Contractor may take

in to account the benefit of above provisions as the cost of input to Contractor will be net of Excise Duty and service Tax and adjust their offer price accordingly to make it more competitive.

Any new tax & duties, if imposed subsequently by statutory authority during contract period (after latest date of offer submission), shall be reimbursed by BHEL on production of relevant supporting document to the satisfaction of BHEL. However, the contractor shall obtain prior approval of BHEL in writing before depositing the new tax to authorities. No reimbursement shall be made on account of increase in rates of existing taxes, duties etc.

3.13 INSURANCE 3.13.1 BHEL shall arrange insurance coverage for the material and properties of BHEL/Customer

covering the risks during transit, storage, erection and commissioning.

It is the entire responsibility of the contractor to insure his workmen against accident and injury while at work as required by the relevant rules and to pay compensation, if any, to their workmen as per workmen's compensation act. The contractor has also to insure his staff against accident/injury. The contractor has to take insurance cover for his tools and plants, assets etc. These insurance covers have to be taken prior to start of his work at the subject project and he shall make available the Policy to BHEL Site in-charge for necessary verification before commencement of work. However, irrespective of such verification/acceptance, the sole responsibility to maintain adequate insurance cover for his workmen, T&P, assets etc. at all times during the period of contract shall lie with the contractor. Regarding the aforesaid insurance cover, the contractor shall directly deal with the Insurance company for all matters regarding the insurance in his scope.

Insurance covers to be taken by BHEL is stipulated under relevant clauses of Vol-IB of this specification (G.C.C).

3.13.2 The contractor will take necessary precautions/due care to protect the material, while in his

custody from any damage/loss till the same is taken over by BHEL or customer. If any damage or descripancy is found, the vendor should inform to BHEL immediately and make a joint inspection of materials, submission of inspection reports for any shortage / damage or anything else called for preservation / conservation / insurance claim. If any theft occurs when the materials are in the vendors’ custody, the vendor has to lodge F.I.R. to the nearest Police Station, Gangajalghati P.S. for searching of the materials. If the materials are not traced out, it is to be replenished by the vendor, failing which BHEL may arrange the same at the risk and cost.

3.13.3 For lodging/processing of insurance claim, the contractor will submit necessary documents. BHEL will reserve the right to recover the loss from the contractor in case the damage/loss is due to negligence/carelessness on the part of the contractor. In case of theft of material under contractor's custody, the same shall be reported to police by the contractor immediately and copy of FIR and subsequent police investigation report shall be submitted to BHEL/customer for taking up with insurance company. Lodging theft and damage report FIR to BHEL / Police will not relieve the contractor of his contractual obligation for the material in his custody.

3.14 AS BUILT DRAWING

The contractor shall submit as-built drawing for handing over to customer after completion of work. The contractor will be given one copy of working drawing. However, the vendor has to make those “as-built drawing” from the modified drawing which is already followed in between the project work. The vendor has to submit as-built drawing with RA bill, in which the work (carried out as per modified drawing) is claimed.

3.15 ADDITIONAL HSE REQUIREMENTS

The vendor will follow HSE policy of BHEL/ PSER and work as per the safety guidelines which is in line with ISO:14001 and OHSAS:18001 standards. A list of the guidelines which should be strictly followed by the vendor is as follows. The scope of vendor shall not be limited to the followings only but shall be guided by the HSE related policies/ guidelines of BHEL as revised to suit the requirement of the standards and statutory requirements. 1.0 Nominate a safety officer who will supervise all the HSE aspects. 2.0 The safety officer will participate in all safety meeting conducted by BHEL. 3.0 Submit site safety plan indicating safety measures to be taken, fire fighting equipments & PPE to be deployed. 4.0 Report every near miss incident to BHEL.

5.0 Report accident report immediately after the occurrence. 6.0 Obtain operation control procedures (OCPs) from BHEL for the work to be executed 7.0 Follow factory act. 8.0 Every worker should use PPE as per his trade. All PPE should confirm to IS. 9.0 Conduct tool box meeting with workers everyday before start of work instructing about the use of PPE. The

outcome of the meeting to be recorded in a register. 10.0 Check fitness of the PPE and lifting tackles weekly and record in a register which will be verified by BHEL. 11.0 No person below 18 years will be employed. 12.0 Deploy fire-fighting equipments and refill before expiry. 13.0 Keep fire extinguishers of adequate type near the hot job and near the electrical machines. 14.0 Copy of valid Test certificates of all T&Ps should be given to BHEL as soon as the item enters the project,

without which the T&P can not be allowed to be used. 15.0 No body will be allowed to work above 2 meters without safety belt/ harness with lifeline secured to a fixed

member. 16.0 Good housekeeping has to be maintained. All debris shall be removed from workplace within shortest possible

time. 17.0 Approach roads should not be blocked with cables, materials or debris. 18.0 First aid boxes have to be kept and maintained with all requisite materials as per factory act. 19.0 Trained person has to be kept for giving first aid. 20.0 Adequate illumination shall be provided where working. 21.0 All vehicles should have backlight, reverse horn and reversing light. 22.0 Crane operator shall have proper license.’ 23.0 Crane should have reverse horn. 24.0 Only skilled person maintain and operate electrical items. 25.0 ELCB has to be used. No temporary connection shall be allowed. 26.0 All fuses shall have standard rating and capacity. 27.0 All power supply cables should be laid above 3 meter level or underground. 28.0 All hand lamps should be powered by 24 volts. 29.0 Water-logging of working area shall be removed. 30.0 For operating portable machines 3 pin plugs shall be used. 31.0 Oxygen and DA cylinders shall be separated labeling full or empty. Full cylinders shall be kept upright. 32.0 Cylinders are not transported by rolling. 33.0 All oil drums shall be kept horizontal. 34.0 Excavated area shall be barricaded off with red-& white tape. 35.0 Proper slope of excavation shall be maintained. 36.0 Proper sign board and illumination shall be maintained at excavated area. 37.0 Wherever possible safety net shall be provided. 38.0 Proper platform and hand rail has to be provided at the work place. 39.0 All electrical equipments shall be earthed at two points. 40.0 Temporary platform should be strong enough, have proper approach and

hand rails The above clauses are indicative only and not exhaustive. The other activities to maintain strong HSE conditions at site which may be beyond the above list of guidelines shall have to be done by the vendor.

ANNEXURE-II

TENTATIVE LIST OF T&P TO BE DEPLOYED BY THE CONTRACTOR Contractor may please note that this list is not exhaustive and they may be required to provide additional T&Ps not covered in the list for proper execution of the job.

A>LIFTING MATERIALS

TRUCK – 8T, HYDRA & TRAILOR STEEL WIRE ROPES SHACKLE JACK HAND PULLEY BLOCK / HOIST SLING TRANSIT PULLEY

B>OIL TREATMENT

TRANSFORMER OIL FILTERATION M/C OF SUITABLE CAPACITIES (AC/DC) OIL HOSE PRE-TREATMENT TANK ( SHOULD ACCOMMODATE TRANSFORMER OIL ) VACCUM PUMP CALIBRATED VACUUM GAUGE OF 1 TOR – 1 no., OIL GAUGE GLASS AND THREE NUMBER STEEL CONTAINERS – 2 no. COMPOUND GAUGE ( PRESSURE SIDE 1 & VACCUM SIDE 760 MM OF HG ) TARPAULIN ( BOTH ORDINARY & FIRE RESISTANT ) TRIDENT HOSE ADAPTER VACCUM CLEANER VACCUM HOSE

C>EXTERNAL ASSEMBLY

SAFETY BELT SAFETY HELMET PROTABLE COLLAPSIBLE LADDER SCAFFOLDING MATERIAL TORQUE WRENCH as mentioned under cl. no. 2.1.16.5.1 (M12.480. M20 2000 KG-CM) PRECISION LEVEL PLUMB BOB VACCUM CLEANER ELECTRIC BLOWER GRINDER HAND LAMP WITH TRANSFORMER ( 240 / 24 V ) DRILL MACHINE TOOL SETS, SPANNER ETC. CABLE CRIMPING TOOLS (HYDRAULIC AND ORDINARY) OF ALL SIZES

D>WELDING & GAS CUTTING

ARC WELDING SET MIG WELDING SET GAS WELDING SET GAS CUTTING SET WELDING MASK, APRON, GLOVE, GLASSES. FILLER ARGON GAS WELDING MACHINES (GENERATOR / TRANSFORMER)

E>TESTING EQUIPMENT

PRIMARY & SECONDARY CURRENT INJECTION TEST KIT PRIMARY / SECONDARY VOLTAGE INJECTION TEST KIT MOTORIZED MEGGER ( 5KV ) OMICRON TEST KIT HAND OPERATED MEGGER

AVOMETER / MOTWANE MAKE PHASE SEQUENCE METER / INDICATOR PRECISION VOLTAGE, FREQUENCY AND TEMPERATURE CALIBRATION DIGITAL MULTIMETER TONG TESTER WITH SELECTOR SWITCH DUCTER / MICRO OHM METER ( DIGITAL ) RELAY TEST KIT ( EEMAKE ‘ZFB’ OF EQUIVALENT ) SCHERING BRIDGE FOR TAN DELTA MEASUREMENT CONTINUITY TESTER, RELAY JACK PLUG THREE PHASE AND SINGLE PHASE VARIAC WHEATSTONE BRIDGE BDV TESTING KIT FOR TRANSFORMER OIL HV TEST KIT (BOTH AC & DC SUITABLE FOR TESTING THE EQUIPMENT VIZ. CABLES/LV/HV SWITCHGEARS/ TRANSFORMERS/ BUSDUCTS ETC. UNDER THE SCOPE OF E&C) TRANSFORMER TURN RATIO KIT

Vendor has to mobilize the following Instruments specially for commissioning of VFD system

DUAL CHANNEL OSCILLOSCOPE WITH STORAGE FACILITY AND B&C PROBES (OSCILLOSCOPE SHALL BE USED FOR OBSERVING ALL THE WAVEFORMS AND SIGNALS.) CURRENT PROBE DIGITAL MULTIMETER LAPTOP PC WITH CABLES FOR CONNECTION TO HPMG RS232 PORT (SUPPLY IN THE SCOPE OF BHEL UNIT), BUT OTHER ACCESSORIES RELATED WITH THE TESTING OF VFD SYSTEM IS IN THE SCOPE OF THE VENDOR

TESTING KIT FOR MOISTURE CONTENT / RESISTIVITY / ACIDITY ETC. OR SUITABLE ARRANGEMENT MADE FOR TESTING AT REPUTED / APPROVED LABORATORIES. The contractor may please note the periodical testing and calibration of the testing equipment are to be done at CMERI / Durgapur, ERIL / Calcutta, Regional research laboratories at Guwahati / Jorhat / Bhubaneswar and copy of test certificates to be submitted to BHEL as per ‘ISO’ norms.

F> UNLOADING OF GENERATOR / TRANSFORMER ALL NECESSARY ARRANGEMENTS E.G. SLEEPER, JACK WINCHES ETC. AS REQUIRED FOR

UNLOADING AND SHIFTING IS TO BE MADE BY THE CONTRACTOR

G>GENERAL EQUIPMENT

STEEL MEASURING TAPES DRILL GAUGES STRAIGHT SHANK DRILLS 1.00 mm TO 13 mm MORES TAPER DRILLS UP TO 40mm HAND REAMER UP TO 50 mm HAND TAPS M1 TO M30 TAPS FOR TAPER PIPE THREAD PT 1/8-3/4, PT 1-2 CARBIDE ROTARY CUTTER S “A” TYPE – “G” TYPE HACK SAW BLADES (HIGH SPEED TOOL STEEL) UPTO 300 mm MACHINIST FILES 250 mm – 300 mm SET OF NEEDLE FILES FILE HANDLES EMERY CLOTHS / PAPERS WORKING LAMPS ( WITH HOLDER & SUFFICIENT EXTN. CHORD ) STEEL TOOL BOXES ( CONTAINING SOCKET WRENCH SET ) TORQUE WRENCHES ADJUSTABLE ANGLE WRENCHES ( UPTO 12’’ ) DE SPANNER SETS RING SPANNER SETS COMBINATION PLIERS INSULATED CUTTING PLIERS WIRE STRIPPERS CABLE JOINT PLIERS CRIMPING TOOLS ( DIFFERENT SIZES )

SCREW DRIVER SETS BIG SCREW DRIVERS JIG SAW TOOTH MACHINE & BLADES CIRCULAR SAW TOOTH MACHINE & BLADES HAND DRILL M/C AND BITS OF DIA 5, 8, 10,12,18 and 22 mm

HAND GRINDER ( Emmery grinder ) AG5 & AG7 WITH GRINDING WHEEL AND CUTTING WHEEL (NO. 36) WIRE SPOOL H. DEWATERING EQUIPMENT

DEWATERING PUMP – 5 HP – 2 NOS.

ANNEXURE-III

TENTATIVE LIST OF CONSUMABLES TO BE PROVIDED BY THE CONTRACTOR

Contractor may please note that this list is not exhaustive and they may be required to provide additional consumables not covered in the list for proper execution of the job.

Welding Electrodes, Filler, Gases, soldering materials Cleaning materials like petrol, petroleum jelly, Carbon Tetra Chloride for cleaning electrical contact

points, Rustolene, Diesel / Keroscene oil for cleaning hardwares, Methyl Ethyl Ketone or equivalent cleaning agent for cleaning busbar joints of SP / IP / LT busduct, acid for DG set batteries etc.

ANNEXURE-IV

T&P TO BE PROVIDED BY BHEL FOR USE OF CONTRACTOR ON SHARING BASIS (FREE OF CHARGES)-

18 T CRAWLER CRANE - 1 NO. 8T /10T/12T HYDRA - 1 NO. 75T or Higher capacity CRAWLER CRANE - 1 NO. EOT CRANE IN TG HALL - 1 NO.

ANNEXURE – A

PVC

1.0 After the `Base Date’, and/ or during the progress of work, the monthly price adjustment

amount of the contract price will be computed as per the formula given below. The base date shall be reckoned as latest due date of submission of offer.

2.0 ER = ER1 – ERo.

3.0 ER1 will be computed as follows. L1 ER1 = ERo (0.15 + 0.85 ---), where Lo

ER = Adjustment to contract price payable to the contractor for each billing.

ER1 = Adjusted amount payable/recoverable to the contractor of contract price for each billing.

ER0 = Value of work done in the billing period.

4.0 The payment of price adjustment amount so computed shall be made against a separate invoice linking the corresponding invoice (gross RA bill amount) after retaining the prorate amount due on completion of guarantee/ final bill (as per payment terms of tender). The amount so retained shall be paid on successful completion of guarantee/ final bill (as per payment terms of tender).

L0 = All India Consumer Price Index for Industrial Workers (All India Average) as published by Labour Bureau, Simla, Government of India as on base date.

L1 = All India Consumer Price Index for Industrial Workers (All India Average) as published by Labour Bureau, Simla, Government of India for the month of work done.

5.0 Total PVC payable / recoverable against the contract shall have an overall ceiling of 12% or 15 % or 20% of the contract price for original contract completion period of up to 24 months,36 months or beyond respectively. No PVC is payable for contracts with completion period lower than & up to 12 months.

6.0 The quantum of such price variation amount per month shall be restricted to the ceiling percentage for each RA Bill amount. The final adjusted amount of PVC will be paid along with the final bill.

7.0 The contractor shall produce necessary Government Notifications/ RBI Bulletins of above component for receiving payment from BHEL/ refund to be made to BHEL, as required, in the formula mentioned above.

8.0 The contractor will be required to raise bills for PVC payment on monthly basis along with RA Bill irrespective of the fact whether, any increase/ decrease in price/ index has taken place or not.

9.0 PVC shall be admissible up to the original completion period of tender.

ANNEXURE - B

ORC (OVER RUN COMPENSATION)

1.0 In case, due to reasons not attributable to the contractor, the work gets extended beyond original completion period, stipulated in tender, the contractor shall be entitled for over run compensation (ORC).

2.0 ORC shall be applicable as per following. 2.1 The rate/ price of balance part of job beyond normal completion period shall be revised by 10 %

from 1st month of extended period. This revised rate shall remain valid for one year. 2.2 The above revised rate shall be further revised by 10 % per year in the subsequent years and this

re-revised rate shall remain valid for one year and so on till completion of contract. 3.0 During the extended period, contractor shall maintain their resources as per mutually agreed

program. However, the contractor have to deploy additional resources, if required, to complete the job within the re-scheduled completion period.

4.0 Payment of ORC shall be subject to compliance to following condition. 4.1 Contractor shall maintain minimum resources as per agreed program and certified by BHEL. 4.2 Contractor shall achieve the target as per agreed program. 4.3 The example is indicated below:

Rate/Price of Balance job on contractual completion date = A, Say Revised Rate during the 1st Year after contractual completion date= 1.1 A Revised Rate during Second Year after contractual completion date PLUS One Year = 1.21 A And so on for subsequent period if applicable. NOTE:

(a) Enhanced rate shall not be applicable during the period in extension where reasons for delay are attributable to vendor as explained below :

Contract period extended - 8 Months, say (Out of 8 Months delay, supposing vendor is responsible for 3 months delay and BHEL is responsible for 5 months delay) Revised Rate 1.1 A shall come into effect on expiry of contract period plus 3 months. Revised rate 1.1A shall be in force for One Year thereafter.

(b) For further extension if any, for application of ORC, above logic shall be applicable after evaluating the reasons of delay.

That is, the revised rate for 2nd year shall come into effect on expiry of delay period attributable to the vendor during first year. i.e, extended period. Contract Period + Vendor Delay (3Month in above case) + One year + Vendor delay during one year extended period.

This revised rate 1.21A shall remain in forces for one year thereafter. And so on.