REPAIR/MAINTENANCE TO TRANSFORMER, LT PANELS AND OTHER ALLIED WORKS AT BORJHAR, AMINGAON, SADILAPUR, SHANTIPUR AND TRANSIT CAMP AREA UNDER GE GUWAHATI

Amount

Excavation in trenches not exceeding 1.50 meter wide and not exceeding 1.50 meter in depth for foundation of electric pole, stay assembly, under ground cables etc and getting out in soft/ loose soil complete all as specified and directed.

Returning, filling in, including spreading, leveling, watering and well ramming in layers not exceding 25 cm in soft/loose soil complete all as specified and directed.

Removing excavated material n exc. 50m and depositing where directed at a level not exceding 1.5m above the starting point complete all as specified and as directed.

Dismantling of old bending/ broken electric poles/struts of any size including necessary disconnection of over head conductor, demolition of concrete foundation and earth work in excavation as required complete all as directed.

Dismantling cross arms of M S channels or angle sections of any size fixed on RCC/Steel tubular pole, separating serviceable cross arms for reuse in the work and removing unserviceable from site complete all as directed.

Taking up/down HT/LT under ground cable of any size and description including protection pipe, cable cover etc complete all as specified and directed. (Note: Excavation and Earth work shall be measured and paid separately under relevant item.)

Materials and Labour for cutting in road/pavement or hard surface etc for laying of pipes, under ground cable etc of any size of approximate width of 45cm and depth 60cm and making good disturbed surfaces completely filling with PCC 1:4:8 type D-2 and removing excavated material at a distance not exc 50m complete all as specified and directed.

Supply and Laying in trenches/fixed to pole, wall etc LT under ground cable 1100 volts grade of size 120 Sqmm 3.5 core , XLPE insulated, PVC sheathed heavy duty, armoured with multi-stranded aluminium conductor all as per IS 7098 (Part-I) 1998, complete all as specified and as directed .

Supply and Laying in trenches/fixed to pole, walls etc HT, XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor, 11000 Volts Grade, of cross sectional area 120 Sq mm, 3 core complete all as specified and directed.

Materials and Labour for cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 70 to 95 sq mm including testing complete all as specified and directed.

Materials and Labour for Outdoor/Indoor end termination cable jointing kit suitable for 1100 Volts grade, XLPE armoured aluminium conductor cable of cross sectional area 120 to 150 sqmm, 3.5 core, heat shrink type complete with jointing material and accessories including testing complete all as specified and directed.

Supplying and Laying brick cable cover with sub class‘B’ old size over burnt bricks laid dry and flat across the axis of cable, abutting each other with gaps between adjacent bricks not exceeding 10mm complete all as specified and as directed.

Materials and Labour for sand cushioning to underground cable in trenches with clean dry (course) sand including filling, spreading and punning to desired thickness for protection of cable complete all as specified and directed.( Punned thickness will be measured).

Supply and fixing 100 mm dia GI pipe ‘light grade’ with all fittings for protection of cable laid in trenches, road crossing, drain crossing, under floor or fixed to iron structures/poles complete all as specified and directed.

Supply, errecting, and fixing steel tubular swaged pole 12.00m long Type -410 SP-64 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 complete all as specified and directed. NOTE: Earth work, cement concrete will be measured and paid seperately.

Materials and Labour for Cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed including two coats of aluminium paint over a coat of red oxide zinc chrome primer including preparation of surfaces complete all as specified and as directed.

Materials and labour for scrapping the existing surfaces of LT steel tubular poles,type 410 SP-31of any lenth including cross arms bracings clamps etc and applying two coats aluminium paint including writing Pole No with black paint as S/S -X/Y complete all as specified and directed. Note- (S/S-X for Sub station No & X/Y for Pole No)

Materials and Labour for plain cement concrete (1:3:6) type C2 (using 40mm graded stone aggregate) for foundation of poles, Stay assembly, struts, etc. including all necessary formwork complete all as specified and as directed.

Materials and Labou for plain cement concrete (1:2:4) type B1 (using 20 mm graded stone aggregate)as in coping of poles including necessary formwork complete all as pecified and as directed.

Materials and Labour for plain cement concrete (1:4:8) type D2 (using 40mm graded stone aggregate) as in foundation, filling and mass concrete complete all as specified and as directed.

Supply and Fixing in repair Galvanised, 2 strand, steel barbed wire 2.24mm dia barbed with 2mm dia barbs at 75mm spacings and straining and fixing to any type of standard rails straining bolts, including, securing or tying at crossings with and provision of galvanised mild steel wire, staples or steel pins, etc. as directed (each line wire to be measured)complete all as specified and directed.

Supply and Fixing in repair chain link fencing made of 3.15mm dia galvanized steel wire of mesh size 75mmx75 mm and fixed in position including line wires, to any type of standards rails, straining bolts etc complete all as specified and directed.

Supply and Fixing in repair off load changeover switch 63 Amps ,415V ,4P of make C & S, model no-CSCSOF63CO4RE or of equivalent make complete all as specified and directed.

Supply and Fixing in repair off load changeover switch 100 Amps ,415V ,4P of make C & S, model no-CSCSOF100 CO4RE or of equivalent make complete all as specified and directed.

Supply and Fixing in repair main switch 63Amps ,415V,4P,switch fuse unit ,rewireable type of make C&S model no CSRW63P3NSRE or of equivalent make complete all as specified and directed.

Supply and Fixing in repair main switch 100Amps ,415V,4P,switch fuse unit ,rewireable type of make C&S model no CSRW100P3NSRE or of equivalent make complete all as specified and directed.

Supply and Fixing in repair MCCB 63Amps 4P ,415V,breaking capacity 10KA of make C&S model no-CS2A4c*R or of equivalent make complete all as specified and directed.

Supply and Fixing in repair MCCB 100Amps 4P ,415V,breaking capacity 25KA of make C&S model no-CS2B4c*R or of equivalent make complete all as specified and directed.

Supply and Fixing in repair MCCB 200Amps 4P ,415V,breaking capacity 25KA of make C&S model no-CS3B4c*R or of equivalent make complete all as specified and directed.

Supply and Fixing in repair MCCB 400Amps 4P ,415V,breaking capacity 50KA , ATM (Thermal Magnetic) Release adjustable Overload 80-100% ,Adjustable Short Circuit 5-10 In ,of make C&S model no-CS3B4c*R or of equivalent make complete all as specified and directed.

Disconnecting electrically and taking down old unserviceable electric control panel/bus bar panel of any size complete all as directed .

Supply, installation, testing and commissioning, LT Outdoor type, cubical panel board of size not les than 1000mmx1100mmx400mm with canopy, suitable for 3 phase, 4 wire, 415 Volts,CPRI approved, factory made having modern fabrication and testing process which includes seven tanks pre treatment process, comprising of degreasing, rising, derusting, phosphating and preservation followed by anti corrosive painting (after applying two coats of metal primer) with siemens grey paint.The panel shall be provided with suitable gasket to make it dust/ vermin proof and degree of protection not less than IP-54 and general construction conforming to IS.The panel shall be made out of 3.15 mm thick CRCA sheet duly compertment wise for each control gear, front and back opening with sliding bolt type locking arrangement. The panel board shall be provided with proper ventillation, including suitable size of cable alley aluminium bus bar suitable for carrying of current 150 Amps. 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.The cubical shall have bottom channel of suitable size MC100 and angle iron 50x50x6mm thick legs of 75 cm long (45cm above ground and 30 cm below ground) and painted with 2 coats of black synthetic enamel paint over a coat of red oxide primer.GI earth busbar of size 50X6 mm shall be provided through out the panel and a detachable pre drilled gland plate of powder coated shall be provided at bottom.All control wires shall be copper conductor, multistranded flexible and shall be bunched, tied, ferruled for proper identification and crimped including cable connections of exsiting cable with adequate size aluminium lugs complete all as directed. The panel shall comprise of the followings:-

(a) Incomming MCCB 63 Amps, 4 pole, 25 KA- 01 No.

(b) Out going MCCB 32 Amps, 4 pole, 25 KA- 01 No.

(c) Out going MCCB 40 Amps,3 pole, 25 KA- 01 No.

(d) Digital voltmeter (0-500 V) - 01 No

(e) Digital Ammeter (0 to 100 Amps) -01 No

(f) CT 100/5 Amp, VA-8 - 03 Nos

(j) Indicator lamp LED type (RYB) (03 Nos) set-01

(k) Panel mounted change over switch 63 A -01 No

(l) Panel mounted star delta starter, 15 HP - 01 No.

Note:- 1. All MCCBs shall be fixed thermal and fixed magnetic setting type. 2. Excavation, earth work and PCC work (1:3:6) shall be measured & paid seperately. 3. Design and drawing of panel board shall be got approved from GE before procurement /incorporation in the work.

Disconnecting of both HT and LT connection from cable end box and taking down the disconnected transformer (Out Door/Indoor type) of 200 to 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 .

Disconnecting of both HT and LT connection from cable end box and taking down the disconnected transformer (Out Door/Indoor type) of 50 to 125 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 .

Disconnecting of both HT and LT connection from cable end box and taking down the disconnected transformer (Out Door /Indoor type) of 250 to 500 KVA capacity from two/four pole structure with the help of recovery/Hydra, chain pulley and other T&P required at site and lower it down to platform and make proper connection complete all as directed.

Taking down unserviceable Copper/aluminium wound from transformer, opening top cover, draining out unserviceable insulation oil and carrying out the following repair work and reassembled after repair complete for 200 to 500 KVA 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.

Taking down unserviceable Copper/aluminium wound from transformer, opening top cover, draining out unserviceable insulation oil and carrying out the following repeir work and reassembled after repair 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 & 250 KVA comprising of the following works as follows:- (a) Rewinding of HT/LT leg coil complete using Aluminium 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 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.

Repair to the transformer of capacity 100 & 150 KVA comprising of the following works as follows:- (a) Rewinding of HT/LT leg coil complete using Aluminium 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 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.

Installation of transformer of same capacity or higher capacity (upto 500 KVA) in place of unsverviceable transformer (which involve major repair and transporting to wksp 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. 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 Aluminium 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 Aluminium 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 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 new 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 complete all as specified and directed.

Dehydration and 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 and paid as "supply only" under item mentioned here in before).

Disconnecting and removing transformer 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 :-

(b) 100 to 200 KVA

(c) 250 to 500 KVA

Repair and 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 following capacity 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.)

(b) 100 to 200 KVA

(c) 250 to 500 KVA

Supply only breather assembly of approved make filled with silica gel suitable for transformer of capacity 50 to 63 KVA complete all as specified and directed.

Supply only breather assembly of approved make filled with silica gel suitable for transformer of capacity 100 to 200 KVA complete all as specified and directed.

Supply only breather assembly of approved make filled with silica gel suitable for transformer of capacity 250 to 500 KVA complete all as specified and directed.

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

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

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

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

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

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

Supply only ceramic bushing on HT side suitable for transformer of capacity 50 to 63 KVA complete all as specified and directed.

Supply only ceramic bushing on HT side suitable for transformer of capacity 100 to 200 KVA complete all as specified and directed.

Supply only ceramic bushing on HT side suitable for transformer of capacity 250 to 500 KVA complete all as specified and directed.

Supply only gasket set for top lid cover & LT and HT terminal bushing suitable for transformer of capacity 50 to 63 KVA complete all as specified and directed.

Supply only gasket set for top lid cover & LT and HT terminal bushing suitable for transformer of capacity 100 to 200 KVA complete all as specified and directed.

Supply only gasket set for top lid cover & LT and HT terminal bushing suitable for transformer of capacity 250 to 500 KVA complete all as specified and directed.

Dismantling of lightening arrestor/expulsion fuse/GOD 11 KV complete all as directed.

Materials and Labour for switches air break, gang operated, triple pole, mechanically operated, mounted on insulator and steel frame, with operating mechanism worked from ground level, for current rating upto 200 amps and 11000 volt complete all as specified and as directed.

Materials and Labour for 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 and as directed.

Supply and Fixing Lightening arrestors expulsion type with all fittings, transmission class, discharge capacity 65 kilo Amps suitable for 11000 volts complete all as specified and directed.

Supply and Fixing in repair Pin type, porcelain, vitreous, white, brown or green insulator including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, 150mm height, 65mm dia for 11000 volts grade complete all as specified and directed.

Materials 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 GI earth strip of 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 pre cast 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-I, 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 mtr.[iv]. Funnel with watering pipe [GI pipe] 20mm bore [ISI marked] medium grade & copper lugs, charcoal & salt as reqd.[v]. GI protection pipe of size 40 mm bore light grade 7.5m.

Supply and Fixing test point terminal block made of gun metal or phosphorus bronze size 75x75x25mm drilled and screwed including 3 nos, 8mm dia 25mm long hex head screw complete all as specified and directed.

M/S K Nath and co

M/S SEWAK SINGH