83932/E8 REPAIR / MAINTENANCE OF TRANSFORMERS, HT PANELS 11 KV VCBS, 4 POLE/ 2 POLE STRUCTURES AND CLEANING OF VEGETATIONS, CUTTING OF TREE BRANCHS AROUND THE HT LINES AT DIFFERENT LOCATIONS OF DOMESTIC AND TECH AREA AT AFS UNDER GE (AF) JORHAT

Amount

Taking out transformer from its position from any location under GE (AF) Jorhat for repair/ servicing/ rewinding of capacity 100 to 200 KVA, 11/ 0.433 KV, disconnecting/ opening HV, LV electrical connections, earthing connections along with following other works. (a) Transporation of transformer to authorized workshop and back to site by making necessary arrangements of T&P (crane, recovery, vehicle, tripoid etc.) (b) Opening of transformer top cover by extraction, removing of serviceable/ unserviceable nuts bolts and washers etc.(c) Draining out of transformer oil and keeping in safe custody for reuse. (d) Lifting primary coil (HT) and secondary coil (LT), dismantling of transformer complete part by part carefully and display all the parts without damaging any portion for inspection . (e) Refilling topping up of transformer oil after dehydration and filteration in transformer. (f) Reassembling the transformer complete with all existing serviceable parts and new parts as per requirement. (g) Reinstall the transformer at site in position as directed after repair connecting HV, LV electrical connections, earthing connections and testing to entire satisfaction on load. Note:- (a) Replacement of userviceable parts like bush insulator, brass studs, gasket, breather assembly, tap changer, rewinding , reinsulation of primary and secondary coil with copper winding wire, dehydration and filteration of transformer oil etc shall be measured and paid seperately under relevant items of schedule. (b) Renewal of adequate size nut, bolts & washers of transformer top cover shall deemed to be included in unit quoted rate.

Taking out transformer from its position from any location under GE (AF) Jorhat for repair/ servicing/ rewinding of capacity 250 to 315 KVA , 11/0.433 KV disconnecting/ opening HV, LV electrical connections, earthing connections along with following other works. (a) Transporation of transformer to authorized workshop and back to site by making necessary arrangements of T&P (crane, recovery, vehicle, tripoid etc.). (b) Opening of transformer top cover by extraction, removing of serviceable/ unserviceable nuts bolts and washers etc . d).Draining out of transformer oil and keeping in safe custody for reuse. (c) Lifting primary coil (HT) and secondary coil (LT) , dismantaling of transformer complete part by part carefully and display all the parts without damaging any portion for inspection. (d) Refilling topping up of transformer oil after dehydration and filteration in transformer. (e) Reassembling the transformer complete with all existing serviceable parts and new parts as per requirement. Note:- (a) Replacement of userviceable parts like; bush insulator, brass studs, gasket, breather assembly, tap changer, rewinding , reinsulation of primary and secondary coil with copper winding wire, dehyderation and filteration of transformer oil etc shall be measured and paid seperately under relevant item of schedule. (b) Renewal of adequate size nut, bolts & washers of transformer top cover shall deemed to be included in unit quoted rate.

Taking out transformer from its Position from any location under GE (AF) Jorhat for repair /servicing/ rewinding of capacity 400 to 630 KVA , 11/0.433 KV disconnecting/ opening HV, LV electrical connections, earthing connections along with following other works. (a) Transporation of transformer to authorized workshop and back to site by making necessary arrangements of T&P (crane, recovery, vehicle, tripoid etc.). (b) Opening of transformer top cover by extraction, removing of serviceable/ unserviceable nuts bolts and washers etc. d) Draining out of transformer oil and keeping in safe custody for reuse. (c) Lifting primary coil (HT) and secondary coil (LT), dismantling of transformer complete part by part carefully and display all the parts without damaging any portion for inspection. (d) Refilling topping up of transformer oil after dehyderation and filteration in transformer. (e) Reassembling the transformer complete with all existing serviceable parts and new parts as per requirement. (f) Reinstall the transformer at site in position as directed after repair connecting HV, LV electrical connections, earthing connections and testing to entire satisfaction on load . Note:- (a) Replacement of userviceable parts like; bush insulator, brass studs, gasket, breather assembly, tap changer, rewinding , reinsulation of primary and secondary coil with copper winding wire, dehydration and filteration of transformer oil etc shall be measured and paid seperately under relevant item of schedule. (b) Renewal of adequate size nut, bolts & washers of transformer top cover shall deemed to be included in unit quoted rate.

Material and labour for winding of 11/0.433 KV LV coils, removing unserviceable insulating materials, double re-insulation with insulating papers and rewinding as per existing size of core of transformer complete including heating , varnishing complete all as specified and as directed.

Material and labour for 11/0.433 KV HV coils, using new copper wire/ strip of proper size including insulating materials (double insulation) as per existing size of core of transformer complete including heating, varnishing complete all as specified and as directed.

Repair/ servicing to transformer at site of capacity 100 KVA to 200 KVA installed on plinth/ pole mounted structure by opening top cover and replacing unserviceable spares/ components of transformer, without lifting core assembely reassembling after repair and testing complete all as directed. Note:- (a) Replacement of userviceable parts like; bush insulator, brass studs, gasket, breather assembly, tap changer, dehydration and filteration of transformer oil etc shall be measured and paid seperately under relevant item of schedule. (b) Renewal of adequate size nut, bolts and washers of transformer top cover shall deemed to be included in unit quoted rate.

Repair/ servicing to transformer at site of capacity 250 KVA to 315 KVA installed on plinth/ pole mounted structure by opening top cover and replacing unserviceable spares/ components of transformer, without lifting core assembly reassembling after repair and testing complete all as directed. Note:- (a) Replacement of userviceable parts like; bush insulator, brass studs, gasket, breather assembly, tap changer, dehydration and filteration of transformer oil etc shall be measured and paid seperately under relevant item of schedule. (b) Renewal of adequate size nut, bolts and washers of transformer top cover shall deemed to be included in unit quoted rate.

Repair/ servicing to transformer at site of capacity 400 KVA to 630 KVA installed on plinth / pole mounted structure by opening top cover and replacing unserviceable spares/ components of transformer, without lifting core assembly reassembling after repair and testing complete all as directed. Note:-(a) Replacement of userviceable parts like; bush insulator, brass studs, gasket, breather assembly, tap changer, dehyderation and filteration of transformer oil etc shall be measured and paid seperately under relevant item of schedule. (b) Renewal of adequate size nut, bolts and washers of transformer top cover shall deemed to be included in unit quoted rate.

Repair/ servicing to transformer at site of capacity 1000 KVA to 2000 KVA installed on plinth/ pole mounted structure by opening top cover and replacing unserviceable spares/ components of transformer, without lifting core assembly reassembling after repair and testing complete all as directed. Note:- (a) Replacement of userviceable parts like; bush insulator, brass studs, gasket, breather assembly, tap changer, dehydration and filteration of transformer oil etc shall be measured and paid seperately under relevant item of schedule. (b) Renewal of adequate size nut, bolts and washers of transformer top cover shall deemed to be included in unit quoted rate.

Supply only ceramic bush insulators on LT side as per existing size, shape and specification for capacity 100 to 200 KVA, 11/0.433 KV transformers.

Supply only ceramic bush insulators on LT side as per existing size, shape and specification for capacity 250 to 315 KVA, 11/0.433 KV transformers.

Supply only ceramic bush insulators on LT side as per existing size, shape and specification for capacity 400 to 630 KVA, 11/0.433 KV transformers.

Supply only brass stud on LT side as per existing size, shape and specification for capacity 100 to 200 KVA, 11/0.433 KV transformers.

Supply only brass stud on LT side as per existing size, shape and specification for capacity 250 to 315 KVA, 11/0.433 KV transformers .

Supply only brass stud on LT side as per existing size, shape and specification for capacity 400 to 630 KVA, 11/0.433 KV transformers.

Supply only brass stud on LT side as per existing size, shape and specification for capacity 1000 KVA, 33/11 KV transformers.

Supply only brass stud on LT side as per existing size, shape and specification for capacity 2000 KVA, 33/11 KV transformers.

Supply only cork sheet gasket (set of four) for ceramic bushing on LT side as per existing size, shape and specification complete for capacity 100 to 200 KVA, 11/0.433 KV transformers.

Supply only cork sheet gasket (set of four) for ceramic bushing on LT side as per existing size, shape and specification complete for capacity 250 to 315 KVA, 11/0.433 KV transformers.

Supply only cork sheet gasket (set of four) for ceramic bushing on LT side as per existing size, shape and specification complete for capacity 400 to 630 KVA, 11/0.433 KV transformers.

Supply only ceramic bush insulators on HT side as per existing size, shape and specification for capacity 100 to 200 KVA, 11/0.433 KV transformers.

Supply only ceramic bush insulators on HT side as per existing size, shape and specification for capacity 250 to 315 KVA, 11/0.433 KV transformers.

Supply only ceramic bush insulators on HT side as per existing size, shape and specification for capacity 400 to 630 KVA, 11/0.433 KV transformers.

Supply only brass stud on HT side as per existing size, shape and specification for capacity 100 to 200 KVA, 11/0.433 KV transformers.

Supply only brass stud on HT side as per existing size, shape and specification for capacity 250 to 315 KVA, 11/0.433 KV transformers.

Supply only brass stud on HT side as per existing size, shape and specification for capacity 400 to 630 KVA, 11/0.433 KV transformers.

Supply only brass stud on HT side as per existing size, shape and specification for capacity 1000KVA, 33/11 KV transformers

Supply only brass stud on HT side as per existing size, shape and specification for capacity 2000 KVA, 33/11 KV transformers.

Supply only top cover gasket set as per existing size, shape and specification complete for capacity 100 to 200 KVA, 11/0.433 KV transformers.

Supply only top cover gasket set as per existing size, shape and specification complete for capacity 250 to 315 KVA, 11/0.433 KV transformers.

Supply only top cover gasket set as per existing size, shape and specification complete for capacity 400 to 630 KVA, 11/0.433 KV transformers.

Supply only set of gasket as per existing size, shape and specification complete for capacity 1000 KVA, 33/11 KV transformers.

Supply only set of gasket as per existing size, shape and specification complete for capacity 2000 KVA, 33/11 KV transformers.

Supply only breather assembly as per existing size, shape and specification complete for capacity 100 to 200 KVA, 11/0.433 KV transformers.

Supply only breather assembly as per existing size, shape and specification complete for capacity 250 to 315 KVA, 11/0.433 KV transformers.

Supply only breather assembly as per existing size, shape and specification complete for capacity 400 to 630 KVA, 11/0.433 KV transformers.

Supply only breather assembly as per existing size, shape and specification complete for capacity 1000 to 2000 KVA, 11/0.433 KV transformers.

Supply only Tap Changer as per existing size, shape and specification complete for capacity 100 to 200 KVA, 11/0.433 KV transformers.

Supply only Tap Changer as per existing size, shape and specification complete for capacity 250 to 315 KVA, 11/0.433 KV transformers.

Supply only Tap Changer as per existing size, shape and specification complete for capacity 400 to 630 KVA, 11/0.433 KV transformers.

Overhauling servicing of tap changer and replacement of unserviceable parts as ordered with new and assembling with old serviceable parts for smooth functioning and operation complete as all specified and as directed. (Note: Spare parts to be replaced shall be measured and paid seperately under relevant item of schedule.)

Dehydration and filtration of existing transformer oil of transformers of any capacity on site at different locations without disturbing the power supply system with filtration machine and heating system in order to achieve Di-electric strength of oil 50KV-60KV minimum at 2.5 mm gap complete all as directed.

Supply and filling up of transformer oil conforming to IS as in topping up/ replacement up to desired level of transformer oil capacity complete all as specified and as directed. (Note: Dielectric strength of oil should not be less than 50KV at 2.5 mm gap complete all as directed.) Make : GULF/ POWER OIL as approved.

Supply and replacing silica gel in crystal form of breather assembly of transformer capacity upto 500 KVA at installed site complete all as specified and as directed.

Supply and fix in repair for 32 mm dia gun metal drain valve of transformer as per existing one complete all as specified and as directed.

Supply and fix in repair for 25 mm dia gun metal drain valve of transformer as per existing one complete all as specified and directed.

Supply and fix in repair for 20 mm dia gun metal drain valve of transformer as per existing one complete all as specified and as directed

Material and labour for preparation of old painted steel or iron surfaces of transformer of 100 to 200 KVA , 11/0.433 KV capacity transformers by scrapping with steel wire brush/ scrapper emery paper, etc. and applying two coats of synthetic enamel smoke grey paint over a coat of red oxide primer (painting shall be done by spray machine) including writing of SM No, MES No etc. at prominent place/ location of transformer with black synthetic enamel thick paint in white back ground complete all as specified and as directed.

Material and labour for preparation of old painted steel or iron surfaces of transformer of 250 to 315 KVA, 11/0.433 KV capacity transformers by scrapping with steel wire brush/ scrapper emery paper, etc. and applying two coats of synthetic enamel smoke grey paint over a coat of red oxide primer (painting shall be done by spray machine) including writing of SM No, MES No etc. at prominent place/ location of transformer with black synthetic enamel thick paint in white back ground complete all as specified and as directed.

Material and labour for preparation of old painted steel or iron surfaces of transformer of 400 to 630 KVA, 11/0.433 KV capacity transformers by scrapping with steel wire brush/ scrapper emery paper, etc. and applying two coats of synthetic enamel smoke grey paint over a coat of red oxide primer (painting shall be done by spray machine) including writing of SM No, MES No etc. at prominent place/ location of transformer with black synthetic enamel thick paint in white back ground complete all as specified and as directed.

Material labour for preparation of old painted steel or iron surfaces of transformer of 1000 to 2000 KVA, 33/11KV capacity transformers by scrapping with steel wire brush/ scrapper emery paper, etc. and applying two coats of synthetic enamel smoke grey paint over a coat of red oxide primer (painting shall be done by spray machine) including writing of SM No, MES No etc. at prominent place/ location of transformer with black synthetic enamel thick paint in white back ground complete all as specified and as directed.

Material and labour for earthing complete with galvanized steel earth plate electrode 600 mm x 600 mm x 6 mm thick buried directly in ground (earth pit not less then 2.25 meter deep below ground level) with top edge of the plate not less than 1.5 m below normal ground level connected to galvanized earth lead strip of 32X6 mm by means of bolts, nuts, check nuts and washers of galvanized iron or steel and connected to main control board as directed and including provision of concrete pit in PCC (1:3:6) type C1, pre-cast RCC (1:2:4) type B1 cover slab 50mm thick, reinforced with 8mm dia TMT bars @ 120mm C/C both ways, one handle for lifting made out of 10mm dia MS bar, funnel, wire mesh, 20 mm bore galvanized steel tubing (medium grade) for watering, filling charcoal or coke and salt in alternate layers, 40mm bore galvanized steel tubing light grade for protection of earth lead connection, necessary excavation and earth work in any type of soil and including necessary testing complete all as shown on electrical plate No.3 of SSR Part-I . (Note: GI earth strip and protection pipe upto 7.5 metres shall be deemed to be included in quoted rate)

Material and labour for earthing complete with copper plate electrode 300 mm x 300 mm x 3.15 mm thick buried directly in ground (earth pit not less then 2.25 metre deep below ground level) with top edge of the plate not less than 1.5 m below normal ground level connected to copper earth lead strip of 20X3mm by means of bolts, nuts, check nuts and washers of galvanized iron or steel and connected to main control board as directed and including provision of concrete pit in PCC (1:3:6) type C1, pre-cast RCC (1:2:4) type B1 cover slab of 50mm thick, reinforced with 8mm dia TMT bars @ 120mm C/C both ways, one handle for lifting made out of 10mm dia MS bar, funnel, wire mesh, 20 mm bore galvanized steel tubing (medium grade) for watering, filling charcoal or coke and salt in alternate layers, 40mm bore galvanized steel tubing light grade for protection of earth lead connection, necessary excavation and earth work in any type of soil and including necessary testing complete all as shown on electrical plate No.3 of SSR Part-I . (Note: GI earth strip and protection pipe upto 7.5 metres shall be deemed to be included in quoted rate)

Supply and fix in repair for earth continuity conductor or main earthing lead fixed to wall or batten or recess or chases or buried in ground or drawn in conduit/ pipe or fixed to poles or any other indicated situation for loop copper strip of size 20mmx3mm connected to test point including brazing complete all as specified and as directed.

Supply and fix in repair for earth continuity conductor or main earthing lead fixed to wall or batten or recess or chases or buried in ground or drawn in conduit/ pipe or fixed to poles or any other indicated situation for loop of size 32mmx6mm galvanised iron connected to test point including brazing complete all as specified and as directed.

Supply and fix in repair for galvanised iron pipe 40mm bore (dia) ‘light grade’ for protection earth continuity conductor complete all as specified and as directed.

Taking down/ out unserviceable or serviceable UG cables of any cross sectional area and connections including bricks, GI pipes, etc. of any descriptions, laid in trenches and/ or fixing with walls/ poles including segregating of serviceable materials viz bricks, cables, GI pipes, etc. and keep in safe custody for re-use, complete all as specified and as directed. (Note: Earth work shall be measured and paid separately under relevant Items).

Material and labour for HT electric cable unearthed XLPE insulated screened PVC bedded, galvanized steel strip or wire armored, electric power cables (heavy duty) with stranded aluminum conductor, 11000 volts grade of size 3 core 95 sqmm and testing complete all as specified and as directed.

Material and labour for cable jointing kit for 11KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 sqmm to 95 sqmm and testing complete all as specified and as directed.

Material and labour for cable jointing kit for 11KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 sqmm to 95 sqmm and testing complete all as specified and as directed.

Excavation in trenches not exc.1.5 m wide and not exc.1.5 m in depth for foundation, laying of UG cable/ pole/ stays etc and getting out in soft/ loose soil complete all as specified and as directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exceeding 25 cm thick with soils complete all as specified and as directed.

Removing of excavated material (soil) to distance not exceeding 50metre and deposited where directed at a level not exceeding 1.5 metre above the starting point complete all as specified and as directed.

Material and labour for dry river sand as in sand cushioning in trenches/ ducts for protection of underground cable (below, above and around the UG cable laid in trenches) of 23 cm spread thickness ( 8 cm in depth before laying the cable and 15 cm in depth after laying the cable) and consolidated (punned) up to 18 cm thickness complete all as specified and as directed. (Note : Thickness after punning shall be measured for payment)

Material and labour for sub class 'B', old size bricks for cable protection cover, common burnt clay building bricks, laid dry and flat abutting each other with width equal to length of brick and gap between adjacent bricks not exc.10mm complete all as specified and as directed.

Relaying only old bricks for cable protection cover (Serviceable materials obtained from Item No. 57 here-in-before) laid dry and flat abutting each other with width equal to length of brick and gap between adjacent bricks not exc.10mm complete all as specified and as directed.

Trimming of tree branches, girth not exc. 300mm to clear OH line upto 2.0 metres on each side, stacking the branches where directed to a distance not exc 50 metres and clearing the site complete all as specified and as directed.

Cutting of grasses, manually/ grass cutter, earth heaps, etc., cleaning and levelling surroundings of HT/ LT poles including removal of spoil, wastage materials, etc to a distance not exc. 50.00 metres complete all as spcified and as directed.

LESS SCHEDULE OF CREDIT (NOTE : The bidders are required to quote the same amount as inserted in estimated rate column against the group of credit items. For details refer Schedule of Credit including notes therein of tender documents.

M D Constructions Co