REPAIR / MAINT OF EXTERNAL HT ELECTRIFICATION UNDER GE GANGTOK

Amount

Dismantling / Taking out of old unserviceable HT cable from any location, complete all as specified and directed.

Re laying, jointing, testing and commissioning existing HT XLPE cable cross sectional area of any size removed from item no 01 and re laying in DWC pipe / ducts / trenches, under floor and road or fixed to wall etc., complete all as specified and directed.

Supply, laying, jointing, testing and commissioning HT XLPE cable cross sectional area 95 Sqmm 3 core, 11000 volt screened, PVC bedded "Earthed grade" insulated bedded, galvanized steel (Heavy duty) strip armoured with aluminium conductor 11 KV pressure earth system conforming to IS-7098 (Part-I) 1977 and Part-II of 1985 laid in pipe / ducts / trenches, under floor and road or fixed to wall etc., complete all as specified and directed.

Supplyand laying DWC pipe SN-8 with coupler 75 mm OD,ISI marked along with all accessories like socket, bend, couplers etc. conforming to IS 14930, Part II complete with fitting and cutting, jointing etc. laid in trenches/ fixed to pole /laying under road crossing/fixed on pavement walls with clamps, complete all as specified and directed.

M&L in replacement of cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination cold 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, complete all as specified and directed.

M&L in replacement of cable jointing kit for 11 KV (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, complete all as specified and directed.

Taking out Trolley of Vaccum circuit breaker make schnider model HWX / make Areva model VMX 11 KV VCB of rating 630 Amp from the cubical and including opening top cover, de-carbonizing moving and fixed contacts if required,lubricating,inspecting the wiring of microprocessor EF/OC relay,tripping coil electrical and checking for manual/auto tripping system and placing back thr breaker trolly in its original position and checking of VCB panel,HT cable connection,busbar connection, replacement of worn out nut and bolts, checking/repairing internal wiring system complete Calibration of microproccessor E/F and O/C relay of VCB complete and calibrating with portable relay test kit to set time and fault level and adjustment of setting with according to load 7 time with main grid for proper functioning, servicing, Overhauling of the same, checking of the same for proper operation, spring charge,

charged control cables are fastened tightly to the terminals, any abnormality, VCB, cleaning the surface of the insulators, fasten the bolts, checking and correcting interrupting units, mechanism, linkages etc, fasten the hardwares of control wiring, check that the split pins, Circlips, dowell pins etc. have not come out and are intact, lubricate the mechanism, moving parts by castrol, all purpose grease or equivalent, check that the vaccum pots/chambers is within limit including opening of the shutters properly, replacing of the trip catch, roller, holding catch, stopper, close push button, closing cum reassembling, controll limit switches reconnecting of the breaker for smooth functioning all as directed complete testing and commissioning. Ensure proper functioning.

Note- (a) Primary & secondary injection kit shall be arranged by the contractor (b) The contractor shall prepare the relay adjustment and tripping timing chart cablibration report in the follow up fashion and submit to Engineer-in-Charge (c) DC Supplyfor relay testing shall arranged by the contractor (d) Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps spares will be measured and paid separately for replacement of unserviceable items expect copper wire,nuts and bolts,CRC spray,grease and other element for fixing is included in quoted rate.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps Isolating contact 630 A, 3 pair Finger type, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps Vacuum Interrupter VG2, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps 630A,VG2/VG2i/VG3 flexible connector, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps Release coil 220V, DC, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps Trip coil 220V, DC, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps closing coil box assembly, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps Trip coil box, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps release lever assembly, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps chraging pawl, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps Ratchet wheel, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps Trip Roller, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps buffer for opening spring, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps on-off Indicator assembly with spring, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps 220V/DC multi stroker type SG-301-S1, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps motor cut off switch-micro switch assly, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps 12 way Auxiliary Switch (6 NO+6 NC), complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps 3 Phase busbar spout for 630 A, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps 3 phase Circuit spout for 630 A, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps Monoblock rectifier, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps busbar support Insulator-40 KA, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps 64 pin plug & socket assembly, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps pinion of big size and including bearing as per existing suitable for 630 Amps, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps pinion of small size and including bearing as per existing suitable for 630 Amps VCB, complete all as specified and directed.

Supply only aganist repair spare for make schnider / Areva 11 KV VCB of rating 630 Amps breaket Service/test position limit switch operatable for HWX/VMX type Breakers operatable at 110 Volts DC/AC with 2 NO/NC, complete all as specified and directed. Make: ABB/Schnider/ Supply only aganist repair spare for make Schnider / Areva / ABB Make approved by the GE/Engineer in Charge.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps 11 Kv PT HV Back up fuse per OEM Recommendation, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps space heaters of 1 KW, 220Volts, complete all as specified and directed.

Supply only aganist repair spare for make schnider 11 KV VCB of rating 630 Amps thermostate adjustable type 30 to 120 degree Centigrade, complete all as specified and directed.

Supply only aganist repair spare for make schnider / Areva 11 KV VCB of rating 630 Amps in replacement of motor & gear assembly 230V AC suitable for 11 KV HT VCB including testing & puting on load, complete all as specified and directed.

Decarbunizing/cleaning complete HT 11KV VCB panel cable ougoing/Incoming circuit of CTs & PTs, 3 phase, cleaning with CTC and ensure proper decarburizing, re-fixing the same after applying backtol (Red) solution to the spout, checking all the connections, tightening the nuts, bolts thimbles for incoming and outgoing system complete, as specified and directed, rate quoted is inclusive of bactol red, CTC & cotton waste provided by contractor. (Note :- Any unserviceable parts will be measured and paid under below respected items)

Excavating in trenches, n exc 1.5 m wide and n exc 1.5 m in depth; for foundation, laying of underground cables etc. or for shafts, wells, cesspits, manholes, pier holes, under groung cables etc. n exc 10 sq m on plan and n exc 1.5 m in depth and getting out in soft / loose soil, all as specified and directed.

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

Removal of surplus excavated soils to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.50m above the starting point, complete all as specified and directed.

M&L for 80mm dia steel tubes (light grade) galvanised with all fittings, laid in trenches / floor / road crossing for protection of underground cable / earth strip, complete all as specified and directed.

Earthing complete with galvanized steel earth plate electrode 60 cm x 60 cm x 6 mm thick buried directly in ground [earth pit not less than 2.25 metre deep below normal ground level] with top edge of the plate electrode not less than 1.5 m below normal ground level, connected to including galvanised iron strip size 32 x 6 mm by means of bolts, nuts, and washers of galvanized iron or steel all as shown in electrical plate No. 3 of SSR Part I connected to earth test point including provision of earth strip 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 in any type of strata, PCC pit with RCC cover, CI frame, char coal, salt & funnel etc complete all as specified or indicated including testing on completion. Rate to be considered for earth strip to be fixed 7.5 m long, complete all as specified and directed.

Dehydration of transformer oil with transformer oil filtration plant with heating and vaccum dehydration system including testing of transformer oil complete at different location under GE gangtok substation 60 KV dielectric strength not less than 2.5 mm gap, complete all as specified and directed.

Supply& Top up of transformer oil upto conservator level marking with new oil as per IS 335 having dielectric strength not less than 40 KVA, complete all as specified and directed.

M&L for replacement of Transformer of 63 to 315 KVA capacity 11 Kv HT bushing with brass terminal neoprene rubber gasket and washers etc., complete all as specified and directed.

M&L for replacement of transformer of 63 to 315 KVA capacity LT 1100 Volts bushing with brass terminal neoprene rubber gasket and washers etc., complete all as specified and directed.

M&L for replacement of unserviceable breather asembly with silica gel with 40% absorption capacity of transformer 11/0.433KV of capacity upto 400 KVA, complete all as specified and directed.

Disconnecting HT/LT sides of defecctive transformer indoor/outdoor installed on 2/4 pole structrure/PCC foundation of any capacity 160 KVA to 400KVA and including draining of transformer oil,opening of top cover and removal of all HT/LT winding connections from bushing and then lifting of core by means of tripod and chain pulley carefully and inspection and ascertain its serviceability state after keeping it aside. Removal of all sludge and unwanted material from tank and core,lowering of core assembly after carrying out required reapirs to the winding and core, complete all as specified and directed. Note- the following items will be measured and paid separately under relevent items of the BOQ- (i) Rewinding of HT/LT coils/dehydration/filteration/transformer oil topping up/replacement of any spares/parts required for making transformer

M&L in replacement of worn out HT copper coils(limb) made out of super enameled insulated copper wire all as per existing size and shape and including all insulating requiste insulating paper/material in each layer of binding,varnishing and baking in vaccum furnace, complete all as specified and directed.

M&L in replacement of worn out LT copper coils(limb) made out of super enameled insulated copper wire all as per existing size and shape and including all insulating requiste insulating paper/material in each layer of binding,varnishing and baking in vaccum furnace, complete all as specified and directed.

M&L in replacement of worn out bushing rod made out of copper/brass with heavy duty double nuts and one washer at both ends suitable for HT side all as existing size,shape and length suitable for transformer of capacity 160KVA to 200 KVA, complete all as specified and directed.

M&L in replacement of worn out bushing rod made out of copper/brass with heavy duty double nuts and one washer at both ends suitable for HT side all as existing size,shape and length suitable for transformer of capacity upto 250KVA to 400 KVA, complete all as specified and directed.

M&L in replacement of worn out bushing rod made out of copper/brass with heavy duty double nuts and one washer at both ends suitable for LT side all as existing size,shape and length suitable for transformer of capacity upto 160KVA to 200 KVA, complete all as specified and directed.

M&L in replacement of worn out bushing rod made out of copper/brass with heavy duty double nuts and one washer at both ends suitable for LT side all as existing size,shape and length suitable for transformer of capacity upto 250KVA to 400 KVA, complete all as specified and directed.

M&L in replacement of worn out rubberized cork sheet 4 mm thick for transformer top cover suitable for transformer of capacity upto 400 KVA, complete all as specified and directed.

Transporation of transformer of capacity upto 400 KVA to workshop from site of installation for reapirs and includingloading and unloading of transformer and reinstalled the transformer at site from where it was taken for repairs including connecting all HT/LT connections, complete all as specified and directed.

S&F in replacement drop out fuse assembly mounted on poly silicon insulators polymer and steel frame,horizontal/vertical type HT 11 KV lines and including connections etc., complete all as specified and directed.

M&L for cutting the existing road/PCC/drain for taking ou/laying of underground cable including necessary earthwork excavation and amking good to match with the existing surface complete all as specified and with PCC 1:3:6 type C1(using 20 mm graded stone aggergtae)100 mm thick, complete all as specified and directed.

Supplyand fix earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in cnduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. of 32X6 mm galvanised iron strip, complete all as specified and directed.

M&L in replacement of disc type polysilicon polymer insulator on HT 2/3/4 pole structures and including ball and socket type single disc assembly,145mm height and 255 mm dia for 11 KV grade with necessary nuts,bolts,washers etc., complete all as specified and directed.

S&F in replacement of power pack with battery backup 110V AC/30V DC & connected to HT PT secondary circuit and including testing for tripping, complete all as specified and directed.

S&F in replacement of power pack with battery backup 48 V DC & connected to HT PT secondary circuit and including testing for tripping, complete all as specified and directed.

Supply only aganist repair spare for make schnider / Areva 11 KV VCB of rating 630 Amps maintenance free fully charged Lead Acid battery 60 AH,12 volts, complete all as specified and directed.

Supply, Install, testing & commissioning of gang operated device device (GOD), tripple pole current rating 400 amps, HT 11 KV vertical mechanically operated mounted on poly silicon insulators and steel galvanised frame with operating mechanism operated from gorund with and including jumper connections with suitable size & type ACSR conductor along with PVC pipe covering with colour code between main Supplyand GOD complete including taking down old unserviceable, complete all as specified and directed.

M&L for lightening arrestor non linear resistor type confirming to IS-3070 (Part-III) -1993 complete, line discharge current 10 KA (peak) 12 KV ratedsystem voltage peak value high current impulse of 4/10 micro sec, wave shape 100 KA peak assy suitable or 11 KV, long duration discharge class-II with insulation level 28/75KV & mounted on hot dip galvanised steel structure incl all clamps, nuts, bolts & washers & connecting to earth complete on pole structure, complete all as specified and directed.

Repair to HT 11 KV two pole structure of 11 meter height Steel/RCC poles including replacement of all perished ACSR conductor (Beaver) of Horizontal bus bar and down conductors for 1 Nos. GOD system on structure, jumpering and binding with aluminium conductor to the post insulators/pin insulators and providning PVC sleeves to the down conductor with colour code R, Y&B, replacing all rusted nuts & bolts on the four pole structure, complete all as specified and directed.

Taking down rusted unserviceable cross arm and supply and fix of cross arms, bracings, supports clamps, stay clamps etc fabricated from structural steel sections including nuts, bolts, washers welding bending cold or hot drilling holes for bolts any size of shape and including hooks and clamps for aerial bunch cable as indicated and directed and inclusive of two coats of aluminium painting over a coat of red oxide primer, complete all as specified and directed.

Material and labour for brick masonary platform(suitable for 100 to 315 KVA transformser) as directed by engr-in-charge having size 1.6mx1.6m and total height 1.6M(.45 M below ground level including excavation and earth work, 1.15 M above ground level including RCC slab 150mm on top) and cement plaster on all side with 1:4 cement mortar, complete all as specified and directed.

M&L for preparation of old painted surface, cleaning of oils, lubricants, grease etc complete of 4 pole structure as per IS above PCC coping with applying two coats of alluminium paint over one coat of red oxide, incl brackets clamps, channels and cross arms and writing MES no of poles (Number size shall be 25 mm and lettering shall be 40 mm), complete all as specified and directed. (Note: The quoted rate inclusive of two coats of white wash on exposed concrete surfaces)

M&L for preparation of old painted surface, cleaning of oils, lubricants, grease etc complete of 2 pole structure as per IS above PCC coping with applying two coats of alluminium paint over one coat of red oxide, incl brackets clamps, channels and cross arms and writing MES no of poles (Number size shall be 25 mm and lettering shall be 40 mm), complete all as specified and directed. (Note: The quoted rate inclusive of two coats of white wash on exposed concrete surfaces)

Taking down the old unserviceable potencial transformer, Supplyand fix new 11 KV/110/100VA with drawable type and epoxy including PT grid with new riser complete suitable for HT 11 KV panel complete incl testing & commissionin, complete all as specified and directed. Make: Schenider /ABB / Areva /BHEL

Taking down the old unserviceable current transformer, Supplyand fix new 11 KV CT 200-100/5/5 with drawable type and epoxy including CT grid with new riser complete suitable for HT 11 KV panel complete incl testing & commissioning, complete all as specified and directed. Make: Schenider /ABB / Areva /BHEL

S&F of danger noticed plate of 4.0 mm thick polyvinile/ hylem sheet, vitreous enamelled white, with reflexive letters/stickering, figures and conventioned skull and bones in signal red colour and fixed with M S clamps, bolts and nuts of approved size, for HT 25 x 20 cm size, complete all as specified and directed.

S&F of identification plate of 4.0 mm thick polyvinile/hylem sheet, vitreous enamelled white, with letters,reflexive letters/stickering figures showing the details of 11KV feeder and fixed with M S clamps, bolts and nuts of approved size, complete all as specified and directed.

Note 1:- (Applicable for all parts/items) : The bidders/contractors are advised to read tender document, all drawings & all corrigendum / amendments and general condition of contracts before entry / quoting the rates. Note 2:-The contract sum shall be arrived at after deducting amount of schedule of credit from the total quoted amount.

GEETA CONSTRUCTION (BID ID -3075510)

SANJAY SAW MILL (BID ID -3081596)

Darjeeling Enterprises (BID ID -3084271)

S K ENTERPRISES (BID ID -3079887)