SPECIAL REPAIR TO 1.6 MVA AND 3.15 MVA TRANSFORMER OF MAIN RECEIVING STATION OF JAK FEEDER UNDER GE (WEST) JABALPUR

Amount

Disconnecting and taking down faulty/ defective copper wound power transformer of capacity 3.15 MVA, voltage ratio 33/11 KV from HR sub station/ Ridge Road Sub Station in Jabalpur cantt and transporting the POWER TRANSFORMER to workshop for complete overhauling/ repairing & servicing as specified in sub Para (B) here- in- after and transporting back the POWER TRANSFORMER from workshop to its existing location after complete overhauling/ repairing & servicing including loading & unloading of POWER TRANSFORMER into the truck with the help of skilled labours and re-installation of POWER TRANSFORMER at its existing position with the help of chain pullies & skilled labours and making all necessary incoming & outgoing connections and tightening of all connection nuts, bolts, screws etc including following tests at 33 KV before installation and commissioning at site complete all as specified & directed :- (a) Insulation Resistance Test (By 5000 V Megger) (b) Ratio Test (c) Double Voltage & Double Frequency Test (d) Transformer Oil Value BDV Test (e) Tap Changing Test of load for all tap position

(B) M&L for opening the top cover of defective copper wound POWER TRANSFORMER of capacity 3150 KVA, ratio 33/11 KV for complete overhauling/ repairing & servicing in folllowing manner:- (a) Taking out the transformer oil from POWER TRANSFORMER and store the same into seperate barrel container . (b) Taking out the core/ coil assembly of POWER TRANSFORMER. (c ) Cleaning of POWER TRANSFORMER inside by using transformer oil. (d) Re-fixing the core/ coils after complete repair/ replacement of core/ coils in POWER TRANSFORMER including heating up of POWER TRANSFORMER core assembly to remove complete moisture. (e) Replacement of HV/ LV spindles and bushings etc. as per existing make/ as per manufacturer's recommendations duly approved by GE complete all as specified & directed. (f) Re-filling of the removed POWER TRANSFORMER oil after filtration/ centrifusing. (g) Re-fixing of the POWER TRANSFORMER top cover with and including new rubberized gasket set and nuts, bolts and washers for top cover as per existing make/ as per manufacturer's recommendations duly approved by GE and tightening of all nuts, bolts, screws & gasket etc (h) Checking of all electrical and mechanical components at workshop after making the POWER TRANSFORMER fully functional. (j) All other parts/ items/ components of POWER TRANSFORMER which are necessary to be replaced in the opinion of Engr-in-Charge/ as per manuacturer's recommendations for smooth functioning of POWER TRANSFORMER, same shall also be replaced for smooth functioning and cost of the same shall also be deemed to be included in the unit rate quoted by the contractor.

(j) All other parts/ items/ components of POWER TRANSFORMER which are necessary to be replaced in the opinion of Engr-in-Charge/ as per manuacturer's recommendations for smooth functioning of POWER TRANSFORMER, same shall also be replaced for smooth functioning and cost of the same shall also be deemed to be included in the unit rate quoted by the contractor.

(k) This item shall be operated only if Senior Electrical Inspector(SEI) Inspection Report is available with GE.

Disconnecting and taking down of faulty/ defective copper wound POWER TRANSFORMER of capacity 1.6 MVA, voltage ratio 33/11 KV from HR sub station/ Ridge Road Sub Station in Jabalpur cantt and transporting the POWER TRANSFORMER to workshop for complete overhauling/ repairing & servicing as specified in sub Para (B) here- in- after and transporting back the POWER TRANSFORMER from workshop to its existing location after complete overhauling/ repairing & servicing including loading & unloading of POWER TRANSFORMER into the truck with the help of skilled labours and re-installation of POWER TRANSFORMER at its existing position with the help of chain pullies & skilled labours and making all necessary incoming & outgoing connections and tightening of all connection nuts, bolts, screws etc including following tests at 33 KV before installation and commissioning at site complete all as specified & directed :- (a) Insulation Resistance Test (By 5000 V Megger) (b) Ratio Test (c) Double Voltage & Double Frequency Test (d) Transformer Oil Value BDV Test (e) Tap Changing Test of load for all tap position

(B) M&L for opening the top cover of defective copper wound POWER TRANSFORMER of capacity 1.6 MVA, ratio 33/11 KV for complete overhauling/ repairing & servicing in folllowing manner:- (a) Taking out the transformer oil from POWER TRANSFORMER and store the same into separate barrel container . (b) Taking out the core/ coil assembly of POWER TRANSFORMER. (c ) Cleaning of POWER TRANSFORMER inside by using transformer oil. (d) Re-fixing the core/ coils after complete repair/ replacement of core/ coils in POWER TRANSFORMER including heating up of POWER TRANSFORMER core assembly to remove complete moisture. (e) Replacement of HV/ LV spindles and bushings etc. as per existing make/ as per manufacturer's recommendations duly approved by GE complete all as specified & directed. (f) Re-filling of the removed POWER TRANSFORMER oil after filtration/ centrifusing. (g) Re-fixing of the POWER TRANSFORMER top cover with and including new rubberized gasket set and nuts, bolts and washers for top cover as per existing make/ as per manufacturer's recommendations duly approved by GE and tightening of all nuts, bolts, screws & gasket etc

(h) Checking of all electrical and mechanical components at workshop after making the POWER TRANSFORMER fully fuctional. (j) All other parts/ items/ components of POWER TRANSFORMER which are necessary to be replace in the opinion of Engr-in-Charge/ as per manuacturer's recommendations for smooth functioning of POWER TRANSFORMER, same shall also be replace for smooth functioning and cost of the same shall also be deemed to be included in the unit rate quoted by the contractor.

(k) This item shall be operated only if Senior Electrical Inspector(SEI) Inspection Report is available with GE.

Notes for Item No. 1 &2 (A) (i) POWER TRANSFORMER shall only be got repaired from authorised Workshop of Manufacturers of transformer or any other Workshop which have been authorised by MPSEB for repairing of transformer of such type & capacities and GE will approve the workshop in writing before shifting the POWER TRANSFORMER for repairing. (ii) Contractor will submit the certificate of authorised workshop along with RARs and final bill dully verified and signed by Engr-in-Charge. (iii) Cost of cable jointing materials such as cable glands & lugs etc as required shall be deemed to be included in quoted rate and nothing extra shall be paid on this account. (iv) All necessary T&P required at site for shifting of POWER TRANSFORMER shall be arranged by contractor at his own cost and quoted rate shall be deemed to include for all these provisions and nothing extra shall be paid on this account.

Supply only LV leg coils of copper conductor for POWER TRANSFORMER of capacity 1.6 MVA and 3.15 MVA, ratio 33/11 KV complete with insulation, varnishing by vaccum impregnation and baking of coil assembly in oven, complete all as specified & directed.

Supply only HV leg coils of copper conductor for POWER TRANSFORMER of capacity 1.6 MVA and 3.15 MVA, ratio 33/11 KV complete with insulation, varnishing by vaccum impregnation and baking of coil assembly in oven, etc complete all as specified & directed.

Supply and fixing of new rubberized gasket set and nuts, bolts and washers for top cover, LT terminal box and replacement of LV/ HV spindles & bushings if found unserviceable etc as per existing make/ as per manufacturer's recommendations duly approved by GE suitable for indoor/ outdoor TRANSFORMERS of capacity 1.6 MVA and 3.15 MVA to stop the leakage after opening the top cover and taking out and re-filling the transformer oil after filtration/ centrifusing of oil as required in various sub stations under GE (W) Jabalpur complete all as specified and directed. Notes:- (i) HV/ LV spindles and bushings shall be measured and paid for separately under respective items of BOQ as "supply only". (ii) Filtration/ centrifusing of usable transformer oil including filter action by using automatic centrifusing machine shall be measured and paid for separately under respective item of BOQ. (iii) Topping of TRANSFORMERS with new transformer oil if required and same shall be measured and paid for separately under respective item

Supply only LV bushing 33/ 11 KV as per existing make/ as per manufacturer's recommendations duly approved by GE for transformers of capacity 1.6 MVA and 3.15 MVA, to be fixed, complete all as specified & directed.

Supply only HV bushing 33/ 11 KV as per existing make/ as per manufacturer's recommendations duly approved by GE for transformers of capacity 1.6 MVA and 3.15 MVA , to be fixed , complete all as specified & directed.

Supply only HV spindle (metal part) made out of brass with nuts and washers as per existing make/ as per manufacturer's recommendations duly approved by GE for transformers of capacity 1.6 MVA and 3.15 MVA, to be fixed, complete all as specified & directed.

Supply only LV spindle (metal part) made out of brass with nuts and washers as per existing make/ as per manufacturer's recommendations duly approved by GE for transformers of capacity 1.6 MVA and 3.15 MVA, to be fixed, complete all as specified & directed.

Supply, filling and topping up of indoor/ outdoor TRANSFORMERS of any capacity in various sub stations under GE (W) Jabalpur with new transformer oil, low viscosity type of dielectric strength 35 to 40 KV breaking voltage, conforming to relevant IS complete all as specified and directed.

Supply and fixing of silica gel breather (transparent type) with silica gel as per existing make/ as per manufacturer's recommendations duly approved by GE suitable for indoor/ outdoor TRANSFORMERS 1.6 MVA and 3.15 MVA in various sub stations under GE (W) Jabalpur complete all as specified and directed.

Schedule of credit amount of Rs 1028590.00 to be deducted during AOC

M/S HINA ELECTRICALS (BID ID -3104887)

Sachdeva Enterprises (BID ID -3102773)

C L BHATIA (BID ID -3114435)