CWE/P-35/2021-22 REPAIR AND MAINTENANCE OF TRANSFORMER AND ALLIED WORKS UNDER GE BASOLI

Amount

Inspection of defective step down 11 KV / 0.433 upto 500 KVA transformer any make, plinth/floor/pole mounted, indoor/outdoor type, strip opening, removing the top cover of transformer, detecting the fault, rectifying the defect at site(Basoli, Janglote & Madhopur) except major fault of unsv of winding or other all as per direction of Engr-in Charge. The following tasks if required will be performed :- (a) Strip opening of the transformer and removing the transformer top cover for checking/rectifiying the faults of the transformer. (b) Replacement of defective HT/LT bushes, brass spindles etc. (c) Refixing the transformer top cover with nuts, bolts and washers. (d) Testing of transformer Complete. Note : (i) In case of replacement of LV / HV bushing / spindles / tap changer etc, will be measured and paid for separately under relevant items of Sch A/BOQ (ii) Transformer oil (if required) for topping will be measured and paid for separately under relevant item of Sch A/BOQ. (iii) Cost of hiring T&P , megger or any other instrument required at site deemed to be included in the cost of repair.

Inspection of defective step down 11 KV / 0.433 upto 500 KVA transformer any make, plinth/floor/pole mounted, indoor/outdoor type, removing from site (Basoli, Madhopur & janglote), transporting with required T&P to local/authorised work shop for carrying out the repair to transformer, detecting the fault, strip opening of the transformer, rectifying the defect except major fault of burnt winding or other & carrying out of the followings works, required and transporting back to original site & re-fixing :- (a) Taking out the transformer oil from transformer into seperate container barrel. (b) Taking out the core / coil assembly of transformer. (c) Cleaning of transformer inside by used transformer oil. (d) Re-fixing the core/coil in transformer including heating up of transformer core assembly to remove moisture after carrying out the repair as required including filteration /dehydration of oil to remove moisture and suspended dust particles . (e) Replacement the rubber gasket set for top cover, spindles, HT / LT bushing etc. as required (f) Refilling of the removed transformer oil after heating up for removal of moisture. (g) Re-fixing of the transformer top cover with nuts, bolts and washers (h) Testing of transformer Complete.

Note : (i) Replacement of LV / HV bushes / spindles / rewinding of HV / LV coils (replacement or reconditioning ) / tap changer/insulators etc will be measured and paid for separately under relevant items of BOQ. (ii) Top up / replacement of transformer oil (if required) will be measured and paid for separately under respective item of BOQ. (iii) Cost of hiring T&P , megger or any other instrument required at site deemed to be included in the cost of repair .

Repairs / reconditioning of LV leg coil aluminium / copper for transformer of capacity upto 500 KVA to be done only in case where only insulation is damaged and conductor strip is intact i.e. not deformed. This work will involve all turns of leg coil to be reconditioned removing complete insulation from conductor strip, cleaning of conductor, wrapping of conductor with fresh DPC insulation and remaking of LV leg coils with reconditioned strip for use in transformer under repairs complete all as directed.

Repairs / reconditioning of HV leg strip aluminium / copper for transformer of capacity upto 500 KVA including insulation, varnishing by vaccum impregnation and backing of coil assembly complete all as specified and directed by Engineer-in-Charge.

Supply and fix in replacement LV leg strip of aluminum conductor for transformer of capacity upto 500 KVA complete with insulation, varnishing by vaccum impregnation and baking of LV leg strip assembly to match with the existing etc. complete all as specified and directed.

Supply and fix in replacement LV leg strip of copper conductor for transformer of capacity up to 500 KVA complete with insulation, varnishing by vaccum impregnation and baking of strip assembly to match with the existing etc complete all as specified and directed.

Supply and fix in replaacement in HV leg coil of aluminum conductor for transformer of capacity up to 500 KVA complete with insulation, varnishing by vaccum impregnation and baking of coil assembly to match with the existing complete all as specified and directed.

Supply and fix in replacement HV leg coil of copper conductor for transformer of capacity up to 500 KVA complete with insulation, varnishing by vaccum impregnation and baking of coil assembly to match with the existing original winding coils, etc complete all as specified and directed.

Supply and fix in replacement HT 11 KV brass spindle, threaded with washers, nuts,lock nut and rubber seal suitable for transformers of any make /Type rating from 50 KVA to 63 KVA all as specified and directed.

Supply and fix in replacement HT 11 KV brass spindle, threaded with washers, nuts,lock nut and rubber seal suitable for transformers of any make /Type rating from 100 KVA to160 KVA all as specified and directed.

Supply and fix in replacment HT 11 KV brass spindle, threaded with washers, nuts,lock nut and rubber seal suitable for transformers of any make /Type rating from 200 KVA to 250 KVA all as specified and directed.

Supply and fix in replacement HT 11 KV brass spindle, threaded with washers, nuts,lock nut and rubber seal suitable for transformers of any make /Type rating from 300 KVA to 400 KVA all as specified and directed.

Supply and fix in replacment LV bushing 0.433 / 0.415 KV for transformer 50 to 63 KVA complete set all as specified and directed.

Supply and fix in replacment LV bushing 0.433 / 0.415 KV for transformer 100 to 160 KVA complete set all as specified and directed.

Supply and fix in replacement LV bushing 0.433 / 0.415 KV for transformer 200 to 250 KVA complete set all as specified and directed.

Supply and fix in replacementLV bushing 0.433 / 0.415 KV for transformer 300 to 400 KVA complete set all as specified and directed.

Topup / Replacement transformer oil low viscosity approved make as per IS 355 of 1992 and min di-electric strength 50 KV all as specified and directed. Note : (i) Test certificate from manufacturer of oil shall be provided by the contractor.

Filteration and dehydration of existing transformer oil includng heating continuously till obtaining the desired dielectric strength complete inclduing taking result of transformer oil before/after filteration and dehydration of transformer oil all as specified and directed by Engr-in-charge. (The dielectric strength to be achieved 40-45 KV at 2.5 mm gap after completion of de-hydration and filteration).

Supply and fix in replacement of temperature gauge circular dia type of standard size and suitable for indoor/outdoor type transformer of 63 KVA to 500 KVA capacity all as specified and directed.

Supply and replacement of breather assembly duly filled with silica gel of transformer complete all as specified and as directed.

Supply and filling of silica gel in to the existing breather assembly of transformer as directed.

M & L Painting to the transformer of any capacity 63 KVA to 160 KVA complete with synthetic enamel paint as existing earlier by spray painting including filling cavities with filler one coat after cleaning all dust etc and marking SM/MES No on the transformer at both site complete all as specified and directed.

All as per Ser item No 22 her-in-before but 250 - 500 KVA complete all as specified and directed.

All as per Ser item No 22 her-in-before but utp 750 KVA complete all as specified and directed.

S&Fixing in replacement of gun metal gate valve (ISI marked) upto 40mm for drainout of transofrmer oil at the bottom of the container of transformer complete all as specified and directed.

S&Fixing in replacement Gasket sets for transformer tank 50 KVA to 160 KVA capacity with nuts, bolts etc complete all as directed.

Notes : The Schedule of Credit amount shall be deducted from the total of this schedule (BoQ) to arrive at Contract Sum.

Standard engineers