REPAIR /MAINT OF REWINDING OF TRANSFORMER,PAINTING AND IMPROVEMENT OF HT SUB STATION WITH CONNECTED ACCESSORIES AT RMS

M& L for opening up the top cover of transformer taking out the transformer oil in a separate container after disconnecting the HT/LT side electric connections from both the primary & secondary side of the transformer of any type/description (indoor/out door type) installed on pole/floor, for carrying out necessary repair/rewinding to HT/LT side after shifting the transformer to workshop including taking out complete core assembly, megger testing the defective winding portion/taking out, cleaning the laminated core and rewinding with appropriate gauge/winding wire/strip winding of existing description for transformer of capacity 63KVA to 100 KVA including assembling & testing on completion & reinstallation the same at the site complete all as specified and directed. Note:- (a) Winding of coil shall be measured and paid seperately under respective item. (b) All the T&P required for disconnection, connection, arrangement of transportation, suitable capacity of crane for loading and unloading including necessary petty items like bolts, nuts etc will be arranged by the contractor and rates for the same shall have deemed to be included in the quoted rate. (c) The cost for the dehyderation of transformer oil if required shall be measured and paid seperately. (d) The cost of insulation material such as paper, cotton tape, latheriod sheet, cork sheet etc are included in the quoted rate. (e) Proper shut down shall be taken by the contractor before execution of the work. (f) The repairs shall be carried out by authorised workshop of OEM only.

M& L for opening up the top cover of transformer taking out the transformer oil in a separate container after disconnecting the HT/LT side electric connections from both the primary & secondary side of the transformer of any type/description (indoor/out door type) installed on pole/floor, for carrying out necessary repair/rewinding to HT/LT side after shifting the transformer to workshop including taking out complete core assembly, megger testing the defective winding portion/taking out, cleaning the laminated core and rewinding with appropriate gauge/winding wire/strip winding of existing description for transformer of capacity 160KVA to 250 KVA including assembling & testing on completion & reinstallation the same at the site complete all as specified and directed. Note:- (a) Winding of coil shall be measured and paid seperately under respective item. (b) All the T&P required for disconnection, connection, arrangement of transportation, suitable capacity of crane for loading and unloading including necessary petty items like bolts, nuts etc will be arranged by the contractor and rates for the same shall have deemed to be included in the quoted rate. (c) The cost for the dehyderation of transformer oil if required shall be measured and paid seperately. (d) The cost of insulation material such as paper, cotton tape, latheriod sheet, cork sheet etc are included in the quoted rate. (e) Proper shut down shall be taken by the contractor before execution of the work. (f) The repairs shall be carried out by authorised workshop of OEM only.

M& L for opening up the top cover of transformer taking out the transformer oil in a separate container after disconnecting the HT/LT side electric connections from both the primary & secondary side of the transformer of any type/description (indoor/out door type) installed on pole/floor, for carrying out necessary repair/rewinding to HT/LT side after shifting the transformer to workshop including taking out complete core assembly, megger testing the defective winding portion/taking out, cleaning the laminated core and rewinding with appropriate gauge/winding wire/strip winding of existing description for transformer of capacity 315KVA to 400 KVA including assembling & testing on completion & reinstallation the same at the site complete all as specified and directed. Note:- (a) Winding of coil shall be measured and paid seperately under respective item. (b) All the T&P required for disconnection, connection, arrangement of transportation, suitable capacity of crane for loading and unloading including necessary petty items like bolts, nuts etc will be arranged by the contractor and rates for the same shall have deemed to be included in the quoted rate. (c) The cost for the dehyderation of transformer oil if required shall be measured and paid seperately. (d) The cost of insulation material such as paper, cotton tape, latheriod sheet, cork sheet etc are included in the quoted rate. (e) Proper shut down shall be taken by the contractor before execution of the work. (f) The repairs shall be carried out by authorised workshop of OEM only.

Material and labour for rewinding of HT/LT transformers by winding the defective coils with copper wire as of same gauge and existing size together with new material and aluminium bracings beore placing into the transformer and assembling the HT/LT coil with new insulation between core and LT coil and fixing the coil in the chamber, including insulating materials such as cotton tape, packing and sleeves etc varnishing by vaccum impregnation and baking of coil core assembly for copper wound transformer upto 400 kva, testing and commissioning the transformer and recording the test result upto satisfaction levels of Engr-in -Charge complete all as specified and directed.

Supply and fix in repairs HT bushing rod complete with insulator and packing suitable for out door/Indoor type upto 400 KVA, 11KV rating transformers confirming to IS- 334 complete with nut, bolts, brass studs and gasket of synthetic rubber bonded cork sheet all as specified and directed by Engr-in-Charge. Notes :- (i) Rates quoted by the contractor shall be deem to include for opening of top plate of transformer / decanning of oil from transformer up to the level as per requirement and assemble the same after replacement of bushing rod complete all as specified and as directed. (ii) Bushing rod shall be replaced at site. transformer will not be allowed to send to workshop at any cost and all bushing replacement work shall be executed at site only.

Supply and fix in repairs LT bushing complete with insulator and packing suitable for 1100 volts grade complete with nut bolts, brass studs, insulator and gasket etc suitable for upto 400 KVA, 11 KV rating out door/Indoor transformer complete all as specified and as directed. Notes :- (i) Rates quoted by the contractor shall be deem to include for opening of top plate of transformer / decanning of oil from transformer up to the level as per requirement and assemble the same after replacement of bushing rod complete all as specified and as directed. (ii) Bushing rod shall be replaced at site. transformer will not be allowed to send to workshop at any cost and all bushing replacement work shall be executed at site only.

Material and labour for maintenance, servicing & Oil Leakage arresting upto 400 KVA, 11KV rating, Distribution Transformer, providing necessary gaskets, Oil Seals, cleaning, dusting, decarbonising, tightening loosened parts, including replacing worn out part copper studs, bolts nuts and washers replacing oil Seals, HT bush, gasket including unserviceable coil, replacing of defective minor items such as and when required complete all as specified and as directed. NOTE:- Oil to be replaced shall be measured and paid separately, However minor items such as gasket, nut and bolt shall be deemed to be included in the unit rate. The quoted rates are inclusive of crane charges for lifting and re assembling from the structure.

Supply and filling of New transformer oil confirming to IS 335-1963 as amended and die electric strength not less than 60 KV for topping replacement of unserviceable transformer oil complete all as specified and as directed.

M& L for Purification, filtration and Dehydration of transformer oil of transformer installed at various indoor/outdoor sub station by ultra high vacuum filtration machine with stream line filtration plant at a temp 60 to 70 deg. Celsius and achieving minimum dielectric withstand strength of 60 KV for 1 minute in 2.5 mm gap setting (for used oil) complete all as specified and as directed by Engineer-in-Charge. Note: (i) Contractor shall ensure no wastage of transformer oil. (ii) Oil required for topping up the transformer will be measured & paid separately. (iii) Contractor shall be ensure that the conservator tanks are full to its level before starting the dehydration

Material and labour for painting distribution transformer with two coats of synthetic enamel paint of smoke grey colour after neatly cleaning and preparing the surface for the transformer including all bus ducts of capacity up to 400 KVA including writing SM / MES No (5 cm height) with white enamel paint complete all as specified and as directed.