REPAIR AND MAINT TO TRANSFORMER AND ALLIED WORKS AT MIL STN SRI GANGANAGAR

Amount

Disconnecting HT & LT side cables of indoor/ outdoor distribution transformer and earth strip from body and neutral of transformer mounted on two pole/four pole structure /staging and draining & collecting of oil in transformer oil barrel (free from any chemical content) ,dismantling of pipeline,conservator, HV-LV Bushings,opening of top cover, radiator, Tighting /reconnecting transformer after complete repairs including installation & testing the transformer as per relevant IS of the following capacity complete all as specified and directed by Engineer-in-Charge Note : Topping of oil , dehydration of transformer oil ,replacement of gasket , etc will be measured & paid separately under relevant items of this schedule.

Upto cap of 100 KVA

160 KVA to 315 KVA

400 KVA to 630 KVA

Disconnecting HV & LV side cables of Power transformer , 33/11 KV, 1.6/3.15 MVA and earth strip from body/neutral of transformer mounted on platform, draining out oil, opening of top cover, check all connections of Core coil assembly throughly like delta connections, star connections, tapping leads etc, removing all sludge from the bottom of the tank, changing of all gaskets of transformer and all rubber washers, oil seals of HV & LV bushings, put additional insulation where required, checking all the winding & leads throughly, cleaning the tank and washing the core & winding with hot oil through filteration plant. Reconnecting all electric/mechanical items/accessories and carryout necessary testing HV-LV winding resistance TTR, IR value, magnetic & secondary auxillary injection kits or any other required items all as specified to charge the transformer before loaded condition. Note : (i) All tools & tackles rates are included in the quoted rates. (ii) This works shall be completed within 48 hrs from starting the works. In case of delay more than 10 hrs penalty of Rs 10000/ hours will be imposed and recovered during RAR payment. (iii) Schedule/Plan to carry out this item will be informed to Accepting Office & GE /AGE E/M well in advance before 20 days. So that necessary information /permission may be communicated with Stn/ Engineering authorities.

1.6 MVA 33/11 KV

3.15 MVA 33/11 KV

M & L in replacement of following parts of Power transformer of cap 1.6 to 3.15 MVA ,33/11 KV complete all as specified and directed by Engineer-in-Charge.

HV Bushing

LV Busing

HT brass bush rods incl bolts, washers and packing sheet

LT brass bush rods incl bolts, washers and packing sheet

Sundary items viz bolts, screws, washer ets.

Winding Tamprature indicator with Marshelling box

Magnetic Oil Level Gauge

Oil temperature indicator

M & L in replacement of following parts of Distribution transformer of cap 25 to 630 KVA ,11/0.433 KV complete all as specified and directed by Engineer-in-Charge.

HV Bushing

LV Busing

HT brass bush rods incl bolts, washers and packing sheet

LT brass bush rods incl bolts, washers and packing sheet

Complete set of Gasket (Rubberised cork /Neoprina)

Sundary items viz bolts, screws, washer ets.

Tapping Switch Handle

Off Load Tapping Switch

Winding Tamprature indicator

Magnetic Oil Level Gauge

Oil temperature indicator heavy duty 0-150 degre centigrade

S&F in replacement of silica gel complete all as specified and directed by Engineer-in-Charge.

S&F in replacement of Air breather assembly incl silica gel for distribution transformer ranging from 25 KVA to 630KVA ,11/0.433 KV complete all as specified and directed by Engineer-in-Charge.

S&F in replacement of Air breather assembly incl Silica gel for Power transformer 33/11 KV ranging from 3.15 MVA complete all as specified and directed by Engineer-in-Charge.

S&F in replacement of Air breather assembly incl Silica gel for Power transformer 33/11 KV ranging from 1.6 MVA complete all as specified and directed by Engineer-in-Charge.

Supply and filling in replacement of fresh transformer oil confirming to IS 335 having di electric strength not less than 55 KV per 2.5 mm electrode gap existing transformers installed at different locations complete all as specified and directed by Engr-in-Charge. Note :- 1. Oil will be supplied in seal barrel. 2. Barrels will be returned back to Contractor after completion.

Dehydration and filtration of existing transformer oil through high pressure flow oil pump using centrifugal plant to eliminate foreign particles and to improve di-electric strength not less than 55 KV per 2.5 mm electrode gap and to bring the acidity within the permissible limit complete all as specified and directed by Engr-in-Charge.

M & L for preparation of existing painted external surface of Distribution transformer 11/0.433 KV capacities and applying two coats of synthetic enamel paint complete all as specified and directed by Engineer-in-Charge of the following capacity Note :- Rate of Re writing of MES No/SM No included in quoted rate.

25 KVA to 100 KVA

160 KVA to 315 KVA

400 KVA to 630 KVA

M & L for preparation of existing painted external surface of Power transformer 33/11 KV capacities and applying two coats of synthetic enamel paint complete all as specified and directed by Engineer-in-Charge of the following capacity Note :- Rate of Re writing of MES No/ SM No included in quoted rate.

Supply, Installation, Testing and Commissioning of Chemical Earthing in replacement of existing U/S earthing, based on 3 meters long 50 mm dia EC Grade 'K' Copper earth pipe as a electrode 50mm bore duly fixed with connector at top for connection of copper strip 32 x 6mm riveted/nut bolt after 12 mm boring. The Electrode is surrounded by mixture of Teksai Electron 22 kg 1 bag & Ultra 10 Kg 1 bag Chemical compund powder including providing of pit cover heavy duty plastic of suitable size all as per manufacturer specification complete all as specified and directed.. Note: (i) Rate included for Testing commissioning including checking of earth continuity and earth result complete all as specified and as directed. (ii) Venders are bound to get earthing result less than 1 ohm. If the result of earthing not achieved less than 1 ohm by one earthing then another additional earthing will be provided by the contractor as bi-pot including interconnecting with copper strip of same configuration at no extra cost to achieve test result as specified and all as directed by Engr-in -charge. (iii) Rates for copper earth strip of size 32x6 mm up to 7.5 RM will deemed to be included in quoted rates. Copper earth strip beyond 7.50 Mtr shall be measured and paid Separately under relavent items.

M&L in replacement of existing U/S earthing complete with galvanised steel earth plate electrode 60 cm x 60 cm x 6 mm thick burried directly in ground vertically to a depth not less than 2.25 metre below ground level with top edge of earth plate at a depth not less than 1.5 metre below ground level, earth plate surrounded by 15cm thick packed layer of charcoal dust and common salt, connected to galvanized iron strip 32mm x 6mm thick as earth lead by means of bolts, nuts and washers of galvanised iron or steel and thimbles and other end of the earth strip connected to earthing test point/equipment and protected by galvanised iron pipe light grade 40mm dia upto earthing test point/equipment fixed with 2 Nos of mild steel clamp made out 25mm x 3mm flat iron and perforated water pipe 20mm dia GI medium grade and top with socket & plug and bottom connected to earth plate by slit and two bolts/nuts/washers, PCC chamber in cement concrete (1:2:4) type B-1 and CI cover with frame 40 x 40 x 6mm on top and excavation/ earth work complete all as shown in electrical plate No. 3 of MES Schedule Part-I of SSR-2009. Note:- (i) Outer edge of earth pit shall be 1 metre away from the outer edge of PCC chamber. (ii) GI strip upto earth test point/equipment is included in this item. (iii) Water pipe upto earth pit shall be provided in slantling position as included in this item.

M&L in replacement of existing U/S Copper strip of size 32x6mm buried in ground and connected one end to electrode terminal and other end to terminal box with suitable size of GI nut, bolt & washers complete all as specified and directed by Engineer-in-Charge.

S & F in replacement for GI strip 32x6 mm thick fixed in ducts/on wall/in trenches/floor etc and jointing for inter connection of earthing fixed to equipment, test point incl drilling holes and jointing with aluminium nuts, bolts and washers complete all as specified and directed by Engr-in-Charge.

Cutting/ trimming of tree branches not exc 10 cm girth touching/approaching the LT/HT overhead lines conductors with hack saw/axe to clear the LT/HT line upto 3 metre on each side including disposal of trimmed branches 100 Metre away inside the station area & clearing site complete all as specified & directed by Engr-in-Charge. Note (1) :-3Mtr width on each side (Horizontal/vertical) of LT/HT line shall be cleared. Note (2) :- Rates for T&P deemed to be incl in quoted rated. (3) Engr -in-charge will be informed as the affecting feeder will before one week time & approval will be accored in writing .

S&F in replacement lightening arrester expulsion type conforming to IS-3070 Part-II 1989 as amended upto date suitable for 11 KV earth system having discharged current rating 5 KA high current impulse with stand 65 KA for OH 11 KV line including bracket clamps nuts, washers and connecting to earth as specified and directed by Engineer-in-Charge.

M&L in replacement of GI clamp,GI Sheet , GI nut bolt, fabricated from structural steel sections including nuts, bolts, washers, welding , bending cold or hot, drilling holes for transformers HT/LT Side cover plate,bolts, in any shape or size all as directed by Engr in charge.

Surface Dressing / Cleaning of Surrounding Area of Two Pole / four Pole Structure including removing of tree brances, small trees plants bushes digging upto 10 cm depth and again relaying gravels etc complete all as directed by Engr-in-Charge.

M&L for graded gravel/coarse stone aggregate 20 to 40 mm spread and levelled in layers complete all as specified and directed by Engr-in-Charge.

M&L for painting of OH Line Channel where Transformers located, Steel tubular pole , Iron Gate, complete with two coats of synthetic enamel paint of superior quality after scraping, cleaning and preparation of old painted surfaces complete all as specified and directed by Engineer-in-Charge.

Taking out/down old unserviceable, defective any Type/size HT cable including disconnecting/dismantling all the electrical connectionsand deposit to MES Store yard complete all as specified and directed by Engineer-in-Charge.

Supply, laying, jointing testing and commissioning of XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable (heavy duty) with multistranded aluminum conductors, 11 KV grade of cross-sectional area 120 Sqmm, 3 core, IS 7098 marked, suitable for HT 11 KV(E) system , laid in trenches / ducts / encased in GI pipe / fixed to pole complete all as specified and directed by Engineer-in-Charge.

Supply, laying, jointing testing and commissioning of XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable (heavy duty) with multistranded aluminum conductors, 11 KV grade of cross-sectional area 95 Sqmm, 3 core, IS 7098 marked, suitable for HT 11 KV(E) system , laid in trenches / ducts / encased in GI pipe / fixed to pole complete all as specified and directed by Engineer-in-Charge.

Excavation in trenches, not exc 1.5 m wide and n. exc 1.5 m depth; or n exc 10 Sqm on plan and n exc 1.5 m in depth for foundations of poles, struts, stays etc. or laying underground cable etc. in soft/loose soil, & getting out complete all as specified and directed by Engineer-in-Charge.

Returning, filling in, including spreading, levelling, watering and well ramming in layers n.exc 25cm thick complete all as specified and directed by Engineer-in-Charge

Removal of excavated surplus soil to a distance n.exc 50m and depositing where directed at level not exceeding 1.5 m above the starting point complete all as specified & directed by Engineer-in-charge .

M & L for sand cushioning with dry coarse sand to under ground cable below and around after laying the cable jently punning down complete all as specified and directed by Engineer-in-Charge. Note : Thickness after punning shall be considered for payment.

Supply and lay un reinforced pre cast concrete cable cover calss HV type 1 flat size 300 x 180 mm x 40mm complete all as specified and directed by Engineer-in-Charge.

M & L for jointing and testing heat shrinkable, outdoor type, end termination cable jointing kit, suitable for 11KV under ground earthed system 3 core XLPE cable of size 50 to 95 Sqmm including making connections complete all as specified and directed by Engineer-in-Charge.

M & L for jointing and testing heat shrinkable outdoor type, end termination cable jointing kit , suitable for 11KV under ground earthed system 3 core XLPE cable of size 120 to 185 Sqmm including making connections complete all as specified and directed by Engineer-in-Charge.

M & L for jointing and testing heat shrinkable, Indoor type, end termination cable jointing kit, suitable for 11KV under ground earthed system 3 core XLPE cable of size 50 to 95 Sqmm including making connections complete all as specified and directed by Engineer-in-Charge.

M & L for jointing and testing heat shrinkable Indoor type, end termination cable jointing kit , suitable for 11KV under ground earthed system 3 core XLPE cable of size 120 to 185 Sqmm including making connections complete all as specified and directed by Engineer-in-Charge.

M & L 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 by Engineer-in-Charge.

M & L 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 120 sqmm to 185 sqmm complete all as specified and directed by Engineer-in-Charge.

Harsh Construction Co. (BID ID -3351711)

Akarsha Enterprises (BID ID -3352354)