REPAIR/ MAINT OF TRANSFORMER AND OTHER ASSOCIATED WORKS AT 7 AF HOSPITAL KANPUR CANTT

Amount

1. Complete over hauling of transformer of 33/11 KV, step down, out door type of capacity 2000 KVA of Make-AREVA T&D comprising of the following work services at 33/11KV sub station Chandmari :- (a) Disconnection of cable termination of HV & LV ends. (b) Opening of top cover by removing nuts, bolts and all mounting accessories and conservator tanks for visual inspection. (c) Checking of HV/LV insulators including internal inspection (d) Replacement of corroded nuts/bolts with double washers, burned lugs, etc by new one as directed by Engr-in-charge. (e) Servicing of tap changing gears by cleaning and polishing tapping contact points. (f) Removing, cleaning, polishing of bushings and studs of both HV/LV side by using soft cotton cloth including checking for cracking and refixing the same. (g) Refixing all cable terminals HV & LV sides and transformer top cover, conservator tank and other fitments in position. (h) Filling of new silica gel in breather including cleaning & heating (Silica gel shall be measured & paid separately as supply only). (j) Connecting HV & LV side with existing incoming and outgoing cables including re-connection of earth strip/lead. (k) HV side cable connection shall be made with new HV tape & M Seal Monoplast as required at site. (l) All marshalling boxes to be cleaned from inside. (m) All the terminal connection of control and relay wiring to be checked and tighten. (n) Examine the rollers carefully includes greasing them properly. (o) Checking of earthing connection and tightening nuts& bolts with ensuring the earthing system working properly. (p) Buchloz relays where ever mounted on the transformers shall also be checked and made serviceable. (q) The cost of replacement of unserviceable nuts, bolts with double washers, HV / LV tape used, M-Seal, Monoplast, cable end socket, etc shall deemed to be included in the quoted rate. (r) For inspection of internal defect of transformer, the contractor shall provide proper lifting arrangements like tripod, chain &pully, T&P etc and the cost on this account shall deemed to be included in the quoted rate. (s) Contractor shall isolate the transformer from the supply and do earth the transformer properly while servicing the transformer (t) The entire service included Transformer with or without OLTC/off load tap changer.

( u) Rectifying and arresting the oil leakage of transformer of any capacity, disconnection of cable termination of HV& LV ends , opening the top cover by using tripod, chain and pulley after removing all fitments, replacing the components of the transformer such as gaskets, "O" rings etc. Rectify the leaks in a variety of areas such as radiator fins, flanges, circuit breakers, valves, fastener assemblies, Oil leakage through pin hole / crack joint , drain valve / radiator valve , Oil leakages through gasket joints. Applying putty/M-Seal Monoplast where ever necessary. Refixing the top cover and all fitments, refixing cable termination of the HV& LV ends, testing and Cost of all type of gasket, "O" rings, putty/M-Seal Monoplast, lugs, nuts, bolts, double washers etc shall deemed to be included in the quoted rate. (v) Painting of transformer of capacity 2000 KVA with or without OLTC including HV/LV side marshalling box with one coat of synthetic enamel paint by using spray painting method including cleaning of existing surface of all dirt and greasy materials alongwith marking of SM/MES Nos with sticker letters n. exc 2 cm height at appropriate places complete after isolating the transformer from the electric supply and to be earthed all as specified and as directed. (w) Cost of transportation of transformer upto workshop & back and disconnection, dismentalling, installalation after repair including electic /earth connection is deemed to be included in quoted rate. Note-1 Records shall be maintained for each transformer of each capacity duly signed by contractor & Engr-in-charge. Note-2 Any serious fault/defect to be carried out under this item and material required shall be in esured and paid seperately under respective item of BOQ.

Supply and filling/ topup of Transformer oil having die electric strength not less than 60 KV in sealed container complete including centrifuging of oil (if required ) up to getting dielectric strength not less than 60 KV complete all as specified and directed. NOTE: Transformer oil will be supplied by the contractor in sealed container of approved make alongwith necessary manufacturer test cetificate and purchase vouchers.

Supply only silica gel of superior quality for air breather of transformer complete all as specified and as directed.

M&L chemical earthing complete with copper plate electrode 900mmx600mm x 5 mm thick buried directly in ground with top edge of plate not less than 4.5mtr deep below the normal ground level connected to copper strip 32 x 6mm as main earthing lead and connected with tinted copper bolt, nuts, check nuts and washers besides brazing at all joints all as directed and connected to earth test point with and including necessary excavation and earth work, returning filing, removal of extra soil etc, filing adequate quantity of charcoal dust, common salt and MgSO4, PCC (1:3:6) type C-1 using 20mm graded stone aggregate for earth pit chamber with 40mm x 40mm x6 mm mild steel angle iron frame for cover, pre-cast 50 mm thick RCC cover in (1:2:4) type B-1 using 20 mm graded stone aggregate , reinforcement with 8mm TMT bar @ 75 mm c/c on both way , funnel with wire mesh and 50mm dia galvanised iron pipe light grade for earth lead protection and 40 mm dia galvanised iron medium grade for watering including testing on completion including dismentling of old earthing complete all as specified and as directed at 33 KV substation Chandmari and 11 KV sub station at & AFH Kanpur. Note :- (i) The excess requirement (if more than 7.5 Mtr) of copper strip will be measured and paid separately. (ii) The excavation exceeds if any as directed by Engr-in-charge will be deemed to be included under quoted unit rate.

M&L rewinding with supper enameled double paper covered copper wire/ strip for HV/LV (33/11KV) winding having existing size and giving proper insulation and de-moisturizing before assembling the winding core and including primary testing, ratio testing, no load testing, core insulation testing including taking out old unserviceable copper winding wire complete all as specified and as directed. (Note- Rewinding and testing on load transformer to be carried out through approved firm & OEM only).

S&F in replacement of transformer oil temperature gauge, range shall be 0 to 120 degree centigrade as per existing type and model complete all as specified and as directed.

S&F in replacement of transformer winding temperature indicator and oil temp gauge (WTI/OTI) of capacity 2 MVA transformer, three phase as per existing type and model complete all as specified and as directed.

S&F in replacement of Copper strip 32 x 6 mm for extension of earth and connected to transformer/equipment or panel with proper clamp,saddle,nuts,bolts and washers etc properly complete all as specified and as directed .

Supply, insatallation, testing and commissioning in replacement of isolator 33KV, outdoor duty isolator, hand operated triple pole, off circuit, fault making, horizontal mounted,18 insulator type, centre post rotating type, double stac, 33 KV, 400 Amps, as all as specified in particular specification and as per IS-9921 including taking down old unserviceable isolator complete all as specified and as directed.

Taking out existing HT cable off sizes up to 300 Sqmm 3 core from duct/wall/floor/ trenches required at site all as specified and directed by Engineer-in-Charge.

Excavation in trenches not exc 1.5 Mtr wide and not exc 1.5 Mtr in depth and getting out in soft/loose soil complete all as specified and as directed.

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

Removing excavated soil/demolished material /rubbish from the starting point complete all as specified and removed out side MD land at his own arrangement all as directed.

Supply and filling of dry Ganga sand for cushioning for laying cable in trenches 8 cm below cable and 15 cm above cable ((punned upto 18 cm depth) complete all as specified and all as directed by Engineer-in-Charge. (Note:-Punned depth shall be consided for measurment and payment purpose).

Supplying and laying un- reinforced precast concrete cable cover, class HV type 1, flat of size 300mmx180mmx40mm ISI marked complete all as specified and as directed .

Supply, laying & testing of HT XLPE Insulated screened aluminium stranded conductor cable PVC bedded galvanized strip armoured (E) heavy duty 11 KV cross sectional area 120 Sqmm 3 Core conforming to IS 7098 laid in duct/trenches/supporting with pole /passing through pipe including providing route marker where HT cable laid at site complete all as specified and directed. (Note:- Cost of route marker is included in quoted unit rate.)

M&L filtration/dehydration of transformer oil with stream line filtration plant at a temp 60-70 deg. C and achieving di electric strength of not less than 50 KV for 1 minute in 4 mm gap as per IS 335 -1983 complete all as specified and directed by Engr-in-charge Note-(i) Contractor shall use the vehicle mounted filteration plant with new suitable size heavy duty hose pipe. (ii) The transforemr oil required for replacing/top up shall be measured and paid seperately. (iii)Conducsting field testing of die electric strength of transfomer oil beofre and after filteration. (iv) Checking the megger/earth resistance values with battery operated megger of 5 KV.

M&L triple pole mechanically operated mounted on insulator and steel frame with operating machanism worked from ground level for current rating upto 200 Amps suitable for working voltage 11 KV complete all as specified and directed by Engr-in-Charge.

Supply, jointing , commissioning and testing cold Shrinkable straight through joint kit outdoor type complete with all fittings and jointing materials suitable for HT11 KV ( E ) XLPE cable 240 sq mm 3 core complete all as specified and directed.

All as per Item No. 19 above but suitable for cable of size 120 to 185 sq mm 3 core.

All as per Item No.19 above but end termination joint Out door type and suitable for cable of size 120 to 185 sq mm 3 core.

All as per Item No. 19 above but end termination joint Out door type and suitable for cable of size 240 sq mm 3 core.

M&L Removal of old painted surface of Transformer complete upto 500 KVA capacity by scraping with emry paper and cleaning by thinner and finishing the surface smooth and providing new painting of two coat of spray painting with synethetic enamal paint complete including writing of SM/MES No and colour code all as directed by Engineer-in-Charge.

M&L one coat of aluminium painting by using 1st Quality aluminium paint on all MS Channels structure of CT , PT, Islotaor switch , LA and DO fuse etc as per color code after preparation of old surface of 33 KV out door Switch yard at take over Point complete all as specified and directed.

S&F in replacement cross arms bracings clamps fabricated from structural steel including nuts bolts and washers welding , bending , cold or hot etc. including one prime coat one under coat and one final coat of approved colour synthetic enamel paint complete all as specified and directed

S&F in replacement of 2 MVA transformer MCB box with control cable complete all as specified and directed by Engr-in-Charge.

S&F in replacement of Armoured copper control cable 4 Sqmm 6 core multistranded from MCB box to Remote control panel of transformer complete all as specified and directed by Engineer-in-charge.

SHIVALIK ENGINEERING WORKS

keerti trading corporation

SIDDHARTHA CONSTRUCTIONS

Ashirwad Contractor and Supplier

Kumar Electricals