REPAIR MAINT OF HT ELECTRICAL SYSTEM EQUIPMENT PLANTS AND HT UUNDER GROUND CABLES AND OVER HEAD CONDUCTOR AT BORJHAR AMINGAON SADILAPUR SHANTIPUR AND TRANSIT CAMP AREA UNDER GE GUWAHATI

Amount

Excavation in trenches in soft/loose soil not exceeding 1.5 metre wide and not exceeding 1.5 metre deep and getting out including forming bottom surface for laying HT cable Complete all as specified and directed by Eng.-in-charge.

Returning filling in including spreading levelling watering and well ramming in layer not exceeding 25 cm thick complete all as specified and directed by Engr-in-charge.

Removing excavated material not exceeding 50 m and depositing where directed at a level not exceeding 1.5 metre above the starting point complete all as specified and directed by Engr-in-charge.

M & L for sand cushioning to underground cable for protection with fine river sand over, UG cable laid in trenches and gently punned to cushioning to cable complete all as specified and directed. (Note: Thickness of sand cushion after punning down will be measured and paid.)

Supply and laying reinforced precast concrete cable cover, class HV, type -1 flat, size 300 mm x180 mm x 40 mm complete all as specified and directed.

M&L for hard surface cutting as in road ,pavement, etc for laying of cables, pipes etc of any size up to approximate width of 45 cm and depth 60 cm , returning filling and making good to surface with PCC 1:3:6 type C-2 Complete after laying of cable ,pipe etc as required and as specified & directed.

M&L for making hole by suitable means for insertion of GI pipe 80 mm bore for passing cable across the road without cutting the road complete all as specified & directed.

Supply, laying, connecting and testing XLPE HT UG insulated (Earthed),cable laid in trenches/fixed on pole etc with screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminium conductor, 11000 volts grade, cross sectional area 120 sqmm,3 core conforming to IS-7908(Part-I)1988, complete all as specified and directed. Note: Excavation & earth work shall be measured and paid separately.

All as per item No 8 here in before but cable size 95 sqmm , 3 core .

M & L for replacement of cable jointing kit for 11 KV grade (Earthed) HT cable for outdoor termination heat shrinkable type complete with jointing material and accessories suitable for 50 to 95 sqmm 3 core XLPE armoured aluminium conductor cable complete all as specified and directed by Engr in charge.

All as per item No 10 here in before but suitable for 120 to 185 sqmm size cable.

M & L for replacement of cable jointing kit for 11 KV grade (Earthed) HT cable with & including straight through type heat shrinkable jointing kit complete with jointing material and accessories suitable for 50 to 95 sqmm 3 core XLPE armoured aluminium conductor cable complete all as specified and directed by Engr in charge.

All as per item No 12 here in before but suitable for 120 to 185 sqmm size cable.

Supply, laying or fixing as in repair 80 mm bore galvanised iron tubing, light grade, with all fittings for passing of cables laid in trenches or fixed to walls/poles complete all as specified and as directed.

M&L for PCC (1:3:6) type C-2 (using 40 mm graded crushed stone aggregate) as in foundation for filling in mass concrete for pole and stay complete all as specified and directed.

M&L for PCC (1:2:4) type B-1 (using 20 mm graded crushed stone aggregate) as in coping of pole etc including form work complete all as specified and directed.

Supply, errecting, and fixing steel tubular swaged pole 11.00m long Type -410 SP-55 conforming to IS-2713 part I to III 1980 with and including cast iron base plate, finial taper plug,nuts, bolts and washers etc. and fixed into plain cement concrete foundation duly painted with two coats of aluminium paint over one coat of red oxide primer including preparetion of surfaces and making strip 150mm wide upto 1.50m( above PCC coping) by black , yellow paint in alternate layers and pole nos. including dismantling of old poles of any description including demolition of concrete foundation complete all as specified and directed. NOTE: Earth work, cement concrete will be measured and paid seperately.

M & L for replacement, of vertical switch air break gang operated HT 11 KV triple pole mechanically operated out door type and rated capacity 200 Amp with 12 insulator and steel frames mechanically operated mechanism consisting of three male contacts & three female contacts of tinned copper, three arching horns, three MS jumper carrier equipped with braided copper belt , operating rod of medium grade 32/25mm bore GI pipe of suitable length worked from ground level with locking arrangement with clamp of flat iron 50X6 mm complete and testing on load.

Suply and fix swing out expulsion fuse type drop out fuse mounted on two nos of HT insulators single pole upto 25 Amps HT 11 KV with spring mechanism complete including connecting with HT cable leads spirally shaped duly crimped with suitable size lugs complete all as specified & directed by engineer Incharge.

M & L for replacement of Cross arms bracing supports clamps and back plate fabricated from structural steel section including nuts bolts washers welding bending cold or hot drilling holes for bolts in any shape & size as indicated or directed and including of one primer coat one under coat one finishing coat with saluminium paint includin taking down old unserviceable cross arms.complete all as per specified and directed.

M & L for replacement of anti climbing device on HT/LT poles comprising of 2.24 mm dia galvanised steel 2 strand barbed wire with 2 mm dia wire wrapped spirally around poles to a length of 0.5 to1.0 metre clamped and properly secured all as directed.

M & L for replacement of pin type porcelain vitreous white brown or green insulator including one galvanised mild steel spindle two galvanised iron washer and one galvanised iron nut 150 mm height , 150 mm dia for 11000volts grade.

S&F in replacement disc type insulator porcelain vitrcelain vitreous 145mm high and 255mm dia ball and socket type, white,brown or green single disc for tension with tension clamps for conductors, working pressure 11000 volts complete all as specified and directed.

M & L for replacement of lightening arrester expulsion type complete with all fittings ,transmission class discharge capacity 65 KA conforming to IS 3070 Part II of for HT 11000 of Volt complete all as specified and directed.

M & L for replacement of danger notice plate of 1.6 mm thick mild steel sheet, vitreous enamelled/ painted white with letters figures and conventional skull and bones in signal red colour and fixed with M.S. clmps , bolts and nuts of approved size, for HT of size 25 X20 cm complete all as specified and directed.

Supply and fixing cable route indicator made by PCC (75x75x600mm) with base 300x300x40 mm depth below GL ,embossed with letters " MES 11 KV HT" with suitable PCC Foundation in PCC 1:2:4 using 20 mm graded stone aggregate complete all as specified and directed.

Labour only with required tool and plants for dismantling 11 KV GO/DO air break switch assembly, scrubbing rust from all MS parts and refixing in same position after replacement of defecitive worn out spares (Spares required for replacement shall be measured and paid seprately), lubricating all moving linkeges, setting on HT 4 pole/2pole structure to ensure correct operation complete all as directed.

Supply only male contact or moving contact blade made out of Brass suitable for 11 KV GO/DO air break switch assembly.

Supply only female contact or fixed contact jaw made out of Brass suitable for 11 KV GO/DO air break switch assembly.

Supply only pin insulator straight/tilted type suitable for 11 KV GO/DO air break switch assembly.

Supply, install, test and commission LT Panel board, TPN 415 Volts, 50 Hz, out door cubical type floor mounted CPRI approved factory made, double door dust and vermin proof IP-54, fabricated out of CRCA sheet not less than 3.15 mm thick with 2mm thick for internal compartment duly powder coated fixed on angle iron pedestal made out of 50x50x6 mm with cable chamber for individual feeders for incomming and outgoing connections, one set of LED indicator lamp RYB with switch and fuse and the panel board shall be provided with proper ventillation including suitable size of cable alley aluminium bus bar suitable for carrying of current 630 Amps with suitable connections from MCCB out going to main bus bar shall be carried out with TPN aluminium bus bars of suitable rating and connections from main bus bar to out going MCCB's (intake point) will be carried out with TPN aluminium bus bar as per MCCB rating duly insulated and colour coded heat shrinkable sleeve and shall be rigidly mounted on suitable size of bridge insulator including necessary PCC foundation of minimum 0.50 m height positioned and fixed with suitable nut, bolts, washers etc to the MC pedestal all as specified and directed comprising of the following :- (a) MCCB 400 Amps 4 Pole 50 Hz 415 V with thermal magnectic release having rupturing capacity 36 KA - 1No (Incoming). (b) MCCB 250 Amps 4 Pole 50 Hz 415 V with thermal magnectic release having rupturing capacity 25 KA - 2Nos (Outgoing).(c) MCCB 160 Amps 4 Pole 50 Hz 415 V with thermal magnectic release having rupturing capacity 25 KA - 1No (Outgoing).(d) 3Ph digital multi function meter model A, class 1, 5A with relay Vega Series - 1No (e) Indicating lamp 240 volts LED type - set of three.

S&F, in repair, MCCB 400 Amps, 415 Volt, 36 KA, 4 pole adjustable thermal & magnetic trip setting unit complete all as specified and directed.

S&F, in repair, MCCB 250 Amps, 415 Volt, 25 KA, 4 pole with adjustable thermal & magnetic trip setting unit complete all as specified and directed.

S&F, in repair, MCCB 160 Amps, 415 Volt, 25 KA, 4 pole with adjustable thermal & magnetic trip setting unit complete all as specified and directed.

M&L, in repair, earthing complete with galvanized steel earth plate electrode of 60 cm x 60 cm x 6mm thick buried directly in ground [earth pit not less than 2.25 metre deep below normal ground level] with top edge of the plate not less than 1.5 m below normal ground level, connected to galvanized earth strip 32x6mm by means of bolts, nuts, check nuts and washers of galvanized iron or steel all as shown in electrical plate No. 3 of MES SSR Part I all as specified and testing on completion including provision of earth lead protected by 40 mm dia light grade GI pipe & watering pipe shall be 20 mm bore medium grade GI pipe including all excavation and earth work, PCC pit with RCC cover, char coal, salt, funnel etc complete. Note:- Rate quoted by tenderers shall be deemed to include for following provisions-[i]. Excavation & earth work in any type of soil including removing of surplus material upto 50 m. [ii].PCC 1:3:6 type C1 using 20mm graded stone aggregate in pit & 40mm thick precast RCC 1:2:4 type B1 cover 50x50 cm with 8mm TMT bars @ 10 cm C/C both ways with handles.[iii]. Main earthing lead from earth electrode to test point upto 7.5 mtr.[iv]. Funnel with watering pipe [GI pipe] 20mm bore medium grade & copper lugs, charcoal & salt as reqd.[v]. GI protection pipe of size 40 mm bore light grade 7.5m.

M&L earthing complete with copper earth plate 600 x 600 x 3mm thick buried directly in ground pit not less than 2.25 m deep below normal ground level with top edge of the plate not less than 1.5m below normal ground level connected to copper strip of size 20X3 mm duly encased in 25 mm bore light grade GI protection pipe both up to 7.5 mtr in length by means of brass nuts bolts check nut and wahsers starting from earthplate to panel/transformer side all as specified and including necessary excavation earth work, . PCC pit 40mm RCC cover made RCC (:2:4) type B1 using 20mm graded stone aggreagate concrete reinforced with 6mm dia bars 75mm C/C both ways with MS handle 12mm dia PGI funel wire mesh and GI pipe light grade 20mm for watering starting from top edge of the plate complete all as specified testing as per electrical plate No 3 of SSR 2009 (Part 1). The earth plate shall be surrounded with adequate quantity of charcoal dust with common salt, packed on all side of earth plate in alternate layers of thick ness 15 cm each including excavation, earth work in any type of soil, returning and filling in, removal of surplus soil to a distance upto 50 mtr complete all as shown on electrical plate No.3 of SSR Part- I 2009 complete all as specified and directed. .

S&F, in repair, Test point terminal block made of gun metal or phosphorusbronze size 75x75x25mm drilled and screwed including 3 nos. 8mm dia 25mm long hexagonal head screw complete all as specified and as directed.

Disconnecting of both HT and LT connection from cable end box and taking down the disconnected transformer (Out Door/Indoor type) of 250 KVA capacity from platform with the help of recovery/Hydra, chain pulley and other T&P required at site, and transportation of unserviceable transformer to authorized civil workshop and bringing back at same location after repair in a suitable vehicle including loading, unloading, complete all as directed .

All as per item No 38.00 here in before but capacity of 50 to 500KVA .

Taking down the unserviceable Copper/aluminium wound from transformer, opening top cover, draining out unserviceable insulation oil and carrying out the following work for 250KVA capacity transformer all as directed :- (a) Taking out the core with winding assembly. (b) Dismantling of all attachment viz breather assembly, conservator, oil temperature gauge, HT/LT bushing etc. and keeping aside for reuse or replacement as required and directed. (c) Removing of complete winding from core and dismantling the core, cleaning of core laminate sheet and keeping aside for reuse. (d) Cleaning of complete transformer tank oil fins, removing of sludge, and making the inside surface of tank dry by blowing of hot air as directed. (e) Painting of outside surfaces of transformer complete by means of spray machine as directed.

All as per item No 40.00 here in before but capacity 50 to 500KVA

Repair to the transformer of capacity 250 KVA as follows :- (a) Rewinding of HT/LT leg coil complete using copper wire of appropriate gauge, size and turn as per existing with double paper coated insulation including all requisite insulating materials like packing sleeves, separator, tapes etc, heating, varnishing the core and winding assembly after framing up top and bottom steel structure of transformer all as specified and directed. (Note:- HT/LT leg coils, HT/LT Brass spindal, breather assembly and transformer oil shall be measured and paid separately under relevant items as ‘Supply only’).(b) Replacement of all insulating materials other than incorporated for rewinding of HT/LT coils as per existing.(c) Fixing only HT procelain bushing with studs, nuts, washers 3 Nos. and LT procelain bushing with studs, nuts, and washers 4 Nos. and connection with primary and secondary windings and reconnecting with the main terminals as required and directed. (d) Fixing only existing serviceable accessories as obtained from para (b) here-in-before after proper cleaning, minor repairs etc. as required and directed.(e) Replacement of all unserviceable gasket from top cover, HT/LT bushing with new one by using rubberised gasket sheet 4.0mm/6.0mm thick duly pasted with suitable adhesive (f) Replacement of unserviceable bolts with new one and fixing of existing serviceable bolts, nuts, washers of different sizes and tightening properly. (g) Repositioning of core and winding assembly inside the tank, assembling complete unit and making the transformer ready for filling oil and subsequent testing as directed. NOTE:- The repair of the transformer as above shall be carried out in factory premises of OEM only. The extend of repair will be assessed in presense of rep of accepting officer at factory premises of OEm and only then repairs will be carried out.

All as per item No 42.00 here in before but capacity 50 to 500KVA

Installation of transformer of same capacity or higher capacity (upto 500 KVA) in place of unsv transformer (which found major repair and taking to wksp for repair), on hire basis for maximum period of 10 days when ordered. Note:- Repairing of transformer have to be completed with in 10 days duration, no extra cost will be paid toward hiring charges beyond 10 days. Moreover contractor will not be allowed to shift the hired transformer until it is replaced by the repaired transformer. Any thing goes wrong in the hired transformer, no extra cost will be paid towards repairing of hired transformer. Contractor should check the available infrastructure and to be sure regarding safety of transformer before installation. The rate quoted is deemed to be included transportation cost, connecting incoming & outgoing cables, earthing leads lifting/lowering arrangement, labour etc.

Supply only LT leg coil of copper conductor for transformer of capacity 50 to 500 KVA complete with insulation, varnishing by vacuum impregnation and baking coil assembly, etc. as required complete and as directed. Note - weight of LT leg coil shall be measured and paid as per actual measurement on ground .

Supply only HT leg coil of copper conductor for transformer of capacity 50 to 500 KVA complete with insulation, varnishing by vacuum impregnation and baking coil assembly, etc. as required complete and as directed. Note - weight of HT leg coil shall be measured and paid as per actual measurement on ground.

Supply only transformer oil of approved quality as per IS having dielectric strength of 40-60 KV in 2.5mm gap for filling in transformer or for topping up as required and directed.

Dehydration, filtration of transformer oil by means of centrifugal filtration plant to achieve desired dielectric strength of 35 to 40 KV at 4mm gap in existing position of transformer of any capacity and topping up transformer oil at various Sub-Stations all as required and directed by the Engr-in-Charge. Note : Deficient quantity of transformer oil required for topping up shall be measured paid as "supply only" under item mentioned here in before).

Disconnecting and removing transformer 50 to 100 KVA from transformer plinth/four pole structure after disconnecting HT/LT side cable connections and draining out transformer oil for repair/maintenance of transformer of the following capacity all as directed by the Engineer-in-Charge

All as per item No 49.00 here in before but capacity of 150 to 250KVA .

Maintenance of transformer such as cleaning of core and winding by means of washing down with clean dry oil to remove dust/sludge on core and coil, cleaning of oil tank to remove sludge deposits, replacement of old rusted gasket set, burnt out spindle, broken/unserviceable HT and LT ceramic bushing, broken arc horn surge arrester, replacement of silica gel with new one for transformer of capacity 50 to 100 KVA all as required and directed by Engineer-in-Charge :- (Note : (a) Cost of oil for cleaning shall be deemed included in the quoted rate. (b) New Spares required at site against the replacement of old unserviceable one shall be measured and paid separately as ‘Supply only’ under relevant items here-in-after.)

All as per item No 51.00 here in before but capacity of 150 to 500KVA .

Supply only breather assembly of approved make filled with silica gel suitable for transformer of 50 to 100 KVA

All as per item No 53.00 here in before but capacity of 150 to 500KVA .

Supply only brass spindle for terminal on HT side threaded complete with nut washers etc of suitable dia for transformer of 50 to 100 KVA Capacity.

All as per item No 55.00 here in before but capacity of 150 to 500KVA .

Supply only brass spindle for terminal on LT side threaded complete with nut washers etc of suitable dia for transformer of 50 to 100 KVA capacity.

All as per item No 57.00 here in before but capacity of 150 to 500KVA .

Supply only ceramic bushing on HT side suitable for transformer of following capacity 50 to 100 KVA

All as per item No 59.00 here in before but capacity of 150 to 500KVA .

Supply only gasket set for top lid cover & LT and HT terminal bushing suitable for transformer of 50 to 100 KVA capacity.

All as per item No 61.00 here in before but capacity of 150 to 500KVA .

SHANKAR ENTERPRISE