Tender for the work of overhauling, servicing, testing and commissioning of 2x5MVA and 2x8MVA transformers of 1st & 2nd stage 66/6.6kv transformer yard at Tataguni. (Short Term Tender-Call-5)

Name of the work: Tender for the work of overhauling, servicing, testing and commissioning of 1 x 5 MVA (Sl.No.2800055929) & 1 x 8 MVA (Sl.No. 2800037765) Tranformers of 1st & 2nd stage 66/6.6 KV Transformer yard at Tataguni..

Sl. No Specification Unit Qty Unit rates to be quoted

In figures In words

1 Draining out oil from the Power Transformer complete duly collecting the oil in barrels.shifting barrels to safe place (in the Station premises only) with proper tightness of cork/lid to avoid entry of moisture. L 38300

2 Moving the Transformer to the plinth. Weight of 8 MVA Power Transformer-25t Weight of 5 MVA Power Transformer-22.5 t For 8 MVA, Distatnce to be moved-50 m 25t x 50m=1250t/m For 5MVA, Distatnce to be moved-100 m 22.5t x 100m=2250 t/m per t/m 7000

3 Dis-assembly of transformer parts like bushing, radiators, draining oil from the transformer etcfor the total weight of the transformer. Weight of 8 MVA power transformer - 25 MT Weight of 5 MVA Power Transformer-22.5 MT t 27

4 Loading of the transformer tank with active parts and accessories at Stage 1 & 2 Stage Substation at Tataguni. t 95

5 Transportation of transformer using 21 MT to 40 MT Truck & Trailer up to 250km. From Tataguni to Factory . KM 1000

6 Unloading of the faulty transformer tank with active parts and accessories at Firm's site. t 95

7 Dismantling Transformer for joint inspection at repairer's premises including all activities such as opening of top cover, de-tanking of core and winding, separation of HV/LV coils, conducting preliminary test required for assessment of repair work to be undertaken, dismantling core etc., in the presence of BWSSB authorised representative. – 8 MVA & 5MVA Each 4

8 Cleaning, repairing and painting inside the Transformer Tank with hot oil bath and acid proof epoxy paint and painting outside the tank with enamel paint after thorough cleaning including the cost of materials including the painting of radiators at site/firm. 66/11 kV class - 8 MVA & 5 MVA per Transformer 4

9 Reconditioning of accessories like Radiators, Conservator by hot air circulation along with pressure test of radiators and reconditioning of Transformer mounted mechanical relays 110 kV and below class Transformer Each 4

10 Rubberised corksheet/Neoprene rubber Gaskets as necessary for complete Transformer 110kV and below Class Set 4

11 Drying of Power Transformers Drying of Power Transformer at factory: Drying of active parts of Transformer in Oven 110kV and below class Transformer No. 4

12 Tanking the assembly , giving connection providing new gasket, insulating materials confirming to IS putting back the cover tignting the fixtures, fixing the bushing etc, including the cost of all materials like gasket, insulating material, bold and nut etc and labour other accessories as repaired works to facilitate the testing.66/11kV Class - 8 MVA per Transformer 4

13 EHV grade Transformer Oil in new steel barrel of 210 litre capacity including Rebate towards the released oil is 60% of latest IEEMA Rate KL 38.5

14 Filling of oil to main tank and OLTC tank, filtering the oil including filtering till attainment of prescribed BDV value including labour, filtering equipment along with accessories. L 38300

15 Work of repairing of diverter switch and replacement of resistance upto 66KV/6.6KV 8MVA Transformer as specified below: Removing the supply connection of diverter switch draining out the diluted oil of OLTC chamber, removing the diverter switch one by one carefully by using tripped and chain pulley block. Dismantling the diverter switch unit, removing the worn-out resistance from the diverter switch Supply and fixing of new resistance of same capacity as original to the diverter switch without disturbing the other running equipment, cleaning the diverter switch housing chamber to remove the carbon deposit, lowering the repaired diverter switch inside the housing chamber and aligning the centre shaft by using link nut, bolt and washers tighting of resistor conductors carefully without causing damaged to the nearby the contact refilling the good quality high BDV value insulation oil to the diverter switch housing chamber (oil will be supplied by the department) adjusting the micro switch NO, NC contacts and lifting liver for its proper function and covering the chamber by fixing the lid on the top. Testing the operation of tap changing system by giving upto 440 Volts supply from tap position 1 to 25 after satisfactory charging over all 25 taps in forward and reverse direction Job 10

16 Work of repairs/servicing and overhauling of on load tap changer (OLTC) of upto 66KV/6.6KV 8MVA transformer as specified below: Painting of transformer including platform CTS etc., with one cost of red oxide to the rusted portion of transformer, 2 coats of M/s grey enamel paint, RYB color paint to CT caps for identification etc., Rates should quote inclusive of cleaning of the transformer of all sizes. Job 4

17 a) Testing the Transformer for routine tests as per IS 2026-1983 if repairs are carried out at Repairer's work. b) Testing the Transformer for IR values, Voltage ratio at all Taps, Short Circuit Test, Magnetic Balance, Magnetising Current Measurement at low voltage from HV & LV. Magnetising Current Measurement at rated voltage from LV side.66/11kV Class -8 MVA & 5 MVA Each 8

18 Loading of the repaired transformer tank with active parts and accessories at Firm's site. t 95

19 Transportation of transformer using 21 MT to 40 MT Truck & Trailer up to 250km. From factory to tataguni. KM 1000

20 Unloading of the repaired transformer tank with active parts and accessories at Stage 1& 2 stage Substation at Tataguni t 95

21 Assembly of transformer parts like bushing, radiators, draining oil from the transformer etcfor the total weight of the transformer. Weight of 8 MVA power transformer - 25 MT Weight of 5 MVA power transformer - 22.5 MT t 27

22 WTI with 4 contacts, 15 meters capillary length with built in CCU RTD and external remote indicator, range 0-150 deg C with SCADA compatability) No. 4

23 OTI with 2 contacts, 15 meters capillary length with built in CCU, RTD and external remote indicator range 0-150 deg C, with SCADA compatibility No 4

24 Main Tank Conservator Power Transformer: MOG No 4

25 Transformer mounted Protection in Power Transformers Buchholz relay No 4

26 Transformer mounted Protection in Power Transformers Oil Surge relay(OSR) No 4

27 Transformer Mounted Protection in Transformer: Pressure Relief Device (PRD or PRV) No 4

28 Main Tank for Power Transformers Dehydrating Silicagel Breather Assembly No 8

29 Moving the transformer from the plinth. Weight of 8 MVA power transformer - 25 MT Weight of 5 MVA power transformer - 22.5 MT For 8 MVA, Distatnce to be moved-50 m 25t x 50m=1250 t/m For 5MVA, Distatnce to be moved-100 m 22.5t x 100m=2250 t/m per t/m 7000

30 Wiring of Transformer marshaling box, bucholtz relay, fixing Thermometer, OLTC up to control panel and assisting in testing and commissioning by RT/MT Firm engineers. 8 MVA & 5 MVA Power Transformer: per transfor mer 4

31 Bushing for power transformer condenser type OIP bushing for power transformer - 72.5 kV/800Amps No 12

32 Terminal connector Clamps for Bushings for Power Transformer: Suitable for 72.5kV class bushing to suit Twin Moose / Single Drake Conductor. No 12

33 Conventional Bushing with metal parts for Power Transformers 12.1 kV / 800 A - 1250 A - 2000 A No. 16

34 Control Valves for Power Transformers Drain Valve (100 mm to 200 mm size) suitable for 110 kV and below class No. 12

35 Top/Bottom Filter Valve (50 mm to 100 mm size) suitable for 110 kV and above class Transformers No. 94

The rates are Exclusive of GST

Terms and Conditions:

1 All the works should be carried out as per KTPP Act and as per specification and as directed by the Engineer- in-charge.

2 Rates quoted above are including clearance of the site (prior to commencement of work and its completion) in all conditions of site, moisture, weather, monsoon etc.

3 The Board reserves the right to bifurcate the work and entrust if warranted and if found expedient and advantageous to the Board of lowest approved rates.

4 The BWSSB reserves the right to accept or reject any OR all of the tenders without assigning any reason.

5 The firm should have requisite manpower/machineries at their disposal to complete the work within the stipulated period.

6 Rates quoted should be inclusive of all taxes, insurance and freight charges and any other charges and Excluding GST

7 Rates should be quoted by the contractor/firm on Item war basis both in figures and in words.

8 The firm has to upload Turn Over Certificate which is counter signed by Chartered Accountent.

9 The payment will be made after completion of work.

10 The firm has to upload "Form of tender" in the standard format or otherwise, the tender will be liable for rejection.