REPAIR/MAINT OF HT ELECTRICAL SYSTEM, TRANSFORMER/VCBS AND OTHER EQUIPMENT/PLANTS AND HT U/G CABLES AND O/H CONDUCTOR AT BASISTHA, BORJAR, AMINGAON, SADILAPUR, SHANTIPUR AND TRANSIT CAMP 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.

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

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.

Material and labour 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 shall be 150 mm thick below cable, 80 mm above the cable and punned down to a thickness of 180 mm which shall be measured and paid.)

Taking out/taking down old unserviceable under ground cable of any size complete with and including taking out brick protection and Gl pipes as applicable complete all as specified and directed. Note: Excavation and earthwork shall be measured and paid separately.

Taking out PCC cable cover of any type and any size complete all as specified and directed.

Relaying of old cable cover retrieved from excavating HT U/G cable complete all as specified and directed.

Material and labour for galvanised steel tubes, light grade 100 mm bore for cable protection on pole/trenches etc. complete all as specified and directed.

Dismantling of cross arm of MS channel or angle section complete all as specified and directed.

Supply & laying ISI marked & conforming to IS 5820 1970 unreinforced precast concrete cable cover Class HV, Type I, flat size 300 mm X 180 mm X 40 mm in trenches as protection to HT UG cable all as specified and directed.

Material and labour for making hole by suitable means for insertion of GI pipe 80 mm bore for passing cable across the road without cutting the road testing XLPE HT UG complete all as specified and directed.

Supply, laying, connecting and 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-1)1988, laid in trenches/down through pipe fixed to walls/poles or laid under roads/drains/path/culverts complete all as specified and directed. Note: Excavation & earth work shall be measured and paid separately.

Supply, laying. connecting and testing XLPE HT UG R 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 95 sqmm,3 core conforming to IS-7908(Part-1)1988, laid in trenches/down through pipe fixed to walls/poles or laid under roads/drains/path/culverts complete all as specified and directed. Note: Excavation & earth work shall be measured and paid separately.

Material and labour for replacement of cable jointing kit for 11 KV grade (Earthed) HT cable for outdoor end 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.

All as per item No 14.00 here-in-before but suitable for 120 to 185 sqmm size cable complete all as specified and directed.

Material and labour 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.

All as per item No. 16.00 here-in-before but suitable for 120 to 185 sqmm size cable complete all as specified and directed.

Material and labour for replacement of galvanised tubing light grade including taking down, laid in trenches or fixed to pole and /or laid under road in any position with necessary clamp nut and bolt etc of 80mm bore size complete all as specified and directed.

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

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

Material and labour for chain link MS galvanised fencing, any size or type complete as specified and directed.

Supply, erecting and fixing steel tubular swaged pole 11.00m long Type E 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 dually painted with two coats of aluminium paint over one coat of red oxide primer including preparation 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 separately.

Material and labour for replacement, of vertical switch air break gang operated HT 11 KV triple pole mechanically operated outdoor 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 complete all as specified and directed

Supply and fix swing out expulsion fuse type drop out fuse mounted on two nos of HT insulators single pole upto 25 Amps & upto 50 amps HTS 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.

Supply and fix HT drop out expulsion fuse unit suitable for upto 25 Amps capacity at 11 KV, single pole (two post insulators per pole) with HT barrel fuse with holder including necessary connection to ACSR conductor of suitable size including dismantling of old expulsion fuse complete all as specified & directed.

Material and labour 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 aluminium paint complete all as per specified and directed.

Material and labour 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 complete all as per specified and directed

Supply and fix 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.

Material and labour for replacement of lightening arrester zinc oxide (gapless) surge-type complete with all fittings transmission class discharge capacity 10 KA conforming to IS 3070 Part II of for HT 11000 of Volt complete all as specified and directed.

Material and labour 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 clumps, bolts and nuts of approved size, for HT of size 25 X20 cm complete all as specified and directed.

Labour only and T&P for dismantling 11 KV GO/DO air break switch assembly, scrubbing rust from all MS parts and refbong in same position after replacement of definitive worn out spares (Spares required for replacement shall be measured and paid separately), lubricating all moving linkages, setting on HT 4 pole/2pole structure to ensure correct operation complete all as specified and directed .

Supply only male contact or moving contact blade made out of Brass suitable for 11/22 KV GO/DO air break switch assembly complete all as specified and directed .

All as per item No. 32.00 here-in-before but female contact or fixed contact jaw 11/22 KV complete all as specified and directed.

All as per item No. 32.00 here-in-before but pin insulator straight/tilted type complete all as specified and directed.

Material and labour for repairing & servicing with primary and secondary injection and check up / maintenance/ calibration of relays Short circuit / Earth / Over load etc of 11 KV HT VCB by taking out the enclosure including all components and cleaning the bus bar complete & refixing the same after duly repaired and replacement of unserviceable components/parts complete to keep the same functional all as directed (Note:- New Spare/Parts shall be measured and paid separately)

Supply only Vacuum Interrupter/Vacuum bottle 440 Volts as per existing make and as approved complete all as specified and directed.

Supply only Spring charging motor, 250 Watt, 240 Volts, AC as per existing make as approved complete all as specified and directed.

Supply only Breaker Control switch with spring return and sequence device, 32 Amps, 440 Volts as per existing make as approved complete all as specified and directed.

Supply only Closing spring, 440 Volts of existing make complete all as specified and directed.

Supply and fix power pack of existing make complete all as specified and directed.

Supply and fix trolley chamber of existing make complete all as specified and directed.

Supply only Contactor, capacity 240 Volts, 4NO+ 4 NC, 10 Amps as per existing make complete all as specified and directed.

Supply and Fixing. 100 Ah battery, dry type (for battery bank) complete all as specified and directed.

Supply and fix Insulator of VCB chamber of existing make complete all as specified and directed.

Supply and fix in repair on Load changeover, 630 Amps, 50 KA, 415 Volts, 4 Pole with adjustable thermal & adjustable magnetic setting complete all as specified and directed.

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

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

Supplying and laying in replacement synthetic Rubber insulated mats 2.5 mm thick for voltage upto 11 kv for electrical purpose as per IS 15552-2006, (superseding IS 5424) suitable for electrical shock safety of sizes 2m x 1m complete all as specified and directed.

Material and labour 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 15 mm dia light grade GI pipe & watering pipe shall be 20 mm bore medium grade Gl 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 (Gl pipe) 20mm bore medium grade & copper lugs, charcoal & salt as reqd. [v] Gl protection pipe of size 40 mm bore light grade 7.5m.

Material and labour for earthing complete with galvanised steel earth plate electrode 600mmx600mmx6mm thick, buried directly in ground (earth pit not less than 2.25m deep below ground level) with top edge of the plate not less than 1.5m deep below normal ground level, connected with Gl earth strip of Job size 25x4mm as earth lead up to test point by means of nuts, bolts, check nuts protected by and including GI pipe 40mm bore (light grade) and connected to main test point as directed and including concrete pit in PCC (1:3:6) type C-1, precast RCC (1:2:4) type B-1 cover slab 30cm x 30cm x 10 cm, reinforced with 8mm dia TMT bars @ 100 mm C/C both ways with one handle for lifting, made out of 8mm dia TMT bar embedded in precast cover slab, funnel, wire mesh, 15mm bore GI pipe (medium grade) for watering, charcoal and salt in alternate layers, including necessary excavation and earth work in any type of soil complete all as shown on Electrical Plate No 3 of SSR Part-1, complete all as specified including taking down old one and as directed. 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 30x30 cm with 8mm TMT bars @ 10 cm C/C both ways with handles. [iii] Main earthing strip from earth electrode to test point upto 7.5 m. [iv] Funnel with watering pipe [GI pipe] 20mm bore [ISI marked] medium grade & copper lugs, charcoal & salt as required. [v] GI protection pipe of size 40 mm bore light grade 7.5 m.

Material and labour for repairing the transformer of any capacity including transporting from site to outside workshop, required T&P and back to site after repairing and re-install, reconnection in the system and testing at site complete all as specified and directed.

Material and labour for cleaning of surface of the transformer of any capacity by hand scraper and removing the oil mark and applying two coats of synthetic enamel paint suitable to the existing colour all as specified and directed for the following capacities of the transformers:-

(a) Transformer 11 KV/433V of capacity 50/63KVA

(b) Transformer 11 KV/433V of capacity 100 KVA

(c) Transformer 11 KV/433V of capacity 125 KVA

(d) Transformer 11 KV/433V of capacity 160KVA

(e) Transformer 11 KV/433V of capacity 200 KVA

(f) Transformer 11 KV/433V of capacity 250 KVA

(g) Transformer 11 KV/433V of capacity 500 KVA

Material and labour for dehydration and filtration of installed transformer oil by means of centrifuging filtration plant to achieve the di-electric strength as per IS:335 (latest) all as specified and directed. Note:- (i) The contractor has to arrange the de-hydration cum filtration plant with oil hose of sufficient length to reach up to the transformers/ switch gears and the oil di-electric strength testing machine. (ii) Dehydration & filtration of oil transformers shall be carried out ON Line Shut down will be given for making necessary pipe/ hose line connections from machine to transformer. (iii) Deficient quantity of transformer oil required for topping up shall be measured and paid as 'supply only' under relevant item.

Supply and topping up fresh Transformer oil having di-electric strength 40 - 60 KV in 2.5 mm gap into the transformers and the HT switch gears all as specified and directed.

Supply and fix breather in repair for transformers oil conservator bank of capacity from 50/63 KVA to 100 KVA as required all as specified and directed.

Supply and fix breather in repair for transformers oil conservator bank of capacity from 100 KVA to 200 KVA as required all as specified and directed.

Supply and fix breather in repair for transformers oil conservator bank of capacity from 200 KVA to 500 KVA as required all as specified and directed.

Material and labour for replacement of oil level glass in replacement for transformer capacity from 50 KVA to 150 KVA as required at site all as specified and directed.

Material and labour for replacement of oil level glass in replacement for transformer capacity from 200 KVA to 500 KVA as required at site all as specified and directed.

Material and labour for replacement of HT metal parts & HT bushing suitable for indoor/outdoor type transformer of capacity 50 KVA to 150 KVA as required at site all as specified and directed (for three phases).

Material and labour for replacement of HT metal parts & HT bushing suitable for indoor/outdoor type transformer of capacity 200 KVA to 500 KVA as required at site all as specified and directed (for three phases)

Material and labour for replacement of LT metal parts & LT bushing suitable for out door of capacity 50 KVA to 150 KVA as required at site all as specified and directed (for three phase & neutral)

Material and labour for replacement of LT metal parts & LT bushing suitable for Indoor/out door of capacity 200 KVA to 500 KVA as required at site all as specified and directed (for three phase & neutral)

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.

Material and labour for disconnecting the electrical connection of HT and LT side of defective transformer, the same from its position and install the serviceable Transformer (any capacity) and connect the electrical connection of HT & LT both side complete all as specified and directed.

Overhauling of step down transformer of various make 11/433V and 11/0.433 KV by disconnecting LT/HT terminals, decanting transformer oil complete removing sludge cleaning of LT,HT bushings, complete cleaning and removing the dust particles, cleaning the core and winding with compressed air and reassemble complete including replacement of copper washers rubber bushes of LT, HT bushings, replacement of bushes HT &LT if necessary, replacement of cork-sheet of 6 mm thick suitable for transformer top cover, terminal boxes refilling the transformer oil and topping up with new transformer oil and filtration to achieve the dielectric strength upto 60 KV and testing and commissioning on load complete for the following transformers (Note: filtration and new oil, HT &LT bushings will be measured and paid separately).

(a) Transformer 11 KV/433V of capacity 50/63KVA

(b) Transformer 11 KV/433V of capacity 100 KVA

(c) Transformer 11 KV/433V of capacity 160 KVA

(d) Transformer 11 KV/433V of capacity 200 KVA

(e) Transformer 11 KV/433V of capacity 250 KVA

(f) Transformer 11 KV/433V of capacity 500 KVA

Installation of transformer of same capacity or higher capacity (upto 500 KVA) in place of unserviceable transformer (which found major repair and taking to workshop for repair), on hire basis for maximum period of 10 days when ordered. Note:- Repairing of transformer have to be completed within 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. Anything 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.

Taking down unserviceable copper/aluminium wound from transformer, opening top cover, draining out unserviceable insulation of and carrying out the following work for 200 to 500 KVA transformer all as directed by the Eng-in-Charge:- (a) Taking out 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 outside surfaces of transformer complete by means of spray machine as directed.

Taking down unserviceable copper/aluminium wound from transformer, opening top cover, draining out unserviceable insulation of and carrying out the following work for 50 & 125KVA transformer all as directed by the Engr-in-Charge (a) Taking out 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 outside surfaces of transformer complete by means of spray machine as directed.

Repair to the transformer of capacity 200 & 500 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 HTALT leg calls HT/LT Brass spindel, breather assembly and transformer of shall be measured and paid separately under relevant items of this Schedule here-in-after as 'Supply only (b) Replacement of an insulating materials other than incorporated for rewinding of HT/LT coils as per existing (c) Fixing only HT porcelain bushing with studs, nuts washers 3 Nos and LT porcelain 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.

Repair to the transformer of capacity 50 to 125 KVA as follows: (a) Winding 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 of this Schedule here-in-after 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 porcelain bushing with studs, nuts, washers 3 Nos. and LT porcelain 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 duply pasted with suitable adhesive. (f) Replacement of unserviceable bolts with new one and fixing of existing serviceable bolts, nuts, washers of different sizes and lightening 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.

Supply only brass spindle with ceramic bushing for terminal on HT side threaded complete with nut washers etc of suitable dia for transformer of capacity 50 to 63 KVA complete as specified and as directed.

Supply only brass spindle with ceramic bushing for terminal on HT side threaded complete with nut washers etc of suitable dia for transformer of capacity 100 to 200 KVA complete as specified and as directed.

Supply only brass spindle with ceramic bushing for terminal on HT side threaded complete with nut washers etc of suitable dia for transformer of capacity 250 to 500 KVA complete as specified and as directed.

Supply only brass spindle with ceramic bushing for terminal on LT side threaded complete with nut washers etc of suitable dia for transformer of capacity 50 to 63 KVA complete as specified and as directed.

Supply only brass spindle with ceramic bushing for terminal on LT side threaded complete with nut washers etc of suitable dia for transformer of capacity 100 to 200 KVA complete as specified and as directed.

Supply only brass spindle with ceramic bushing for terminal on LT side threaded complete with nut washers etc of suitable dia for transformer of capacity 250 to 500 KVA complete as specified and as directed.

Dismantling of expulsion fuse/GOD 11/22 KV complete as specified and as directed

Supply and fix Gang Operated Device of 11/22 KV Triple pole, mechanically operated, mounted on insulator and steel frame in replacement of Post insulator /fixed contact/ moving contact/ Operating pipe 4.6 Mtr/ bearing assembly and complete servicing including two coats aluminium painting of two/four pole structure complete all as specified and directed.

Supply only post insulator of 11/22 KV complete

Supply only tinned copper flexible jumper 200 A, 11/22 KV complete.

Supply only mild steel jumper carrier for 11/22 KV complete.

Supply only Back connector plate for 11/22 KV complete.

Material and labour for painting of four pole structure complete by two coats of aluminium paint complete all as specified and directed.

Material and labour for painting of two pole structure complete by two coats of aluminium paint complete all as specified and directed.

Supply & spreading stone aggregate of gauge 40 mm in complete area of outdoor substation & 4/2 pole structure area all as specified and directed.

M/S TRADE CENTRE