Essential work of 4X1000 KVA Electrical Sub station and Transformer under EE ( E) BCP MTN New Delhi.

Amount

Dismantling the 1000 KVA oil type transformer from the foundation i/e dismantling of all incoming & outgoing connection ,bus trunking at LT side and HT site etc complete as reqd and keep it to out side the room. etc. complete as reqd.

Loading the 1000 KVA transformer in tempo with the help to chain pulley / Crain & heavy labour at Tel. Exchange & unloading at workshop from tempo i/c cartage from Tel. Exchange to workshop etc complete as reqd.

Loading the transformer in tempo with the help of chain pulley / Crain & heavy labour at workshop & unloading at Tel. Exchange Frame tempo i/c cartage from workshop to Tel. Exchange etc complete as reqd.

Opening of top and disconnecting all the connection from L. T. and H.T. side and opening of the tap charger , lifting the complete core brunt HT 11 KV copper coils of 3 phase, opening the LT strip winding of 3 phase for cleaning the old insulation etc complete as reqd.

Complete rewinding of 1000 KVA primary Delta and star secondary 11 KV / 415 volts oil filled transformer HT and LT side all 3 HT cores and 3 LT cores with suitable size copper strip / wire with H class insulation ,including dismantling the burnt winding of HT and LT sides cleaning the core, varnishing the new winding, heating, drying, testing commissioning complete in all respect etc complete as required with following test a) Megger Test, b) Ratio Test, c) Resistance Test d) Vector group test e) Magnetic balance Test f) Short Circuit Test g) No load Test.

Re assembling and installation the 1000 KVA oil type transformer after rewinding on the foundation i/e all incoming & outgoing connection , bus trunking at LT side and HT site etc complete as reqd and keep it to in side the room and on loading testing etc. complete as reqd.

Supply and fixing of Transformer temperature relay with dismantling of brunt out temperature relay and wiring connection testing etc complete as required.

Blowing off dust/dirt complete HT Panel 1 no, LT Panel 1No, Capacitor panel-2 Nos., Emergency Panel 1 No. and cleaning in site and out site tightening of all loose nut, bolt etc. as required.

Servicing of 800 to 3200 Amp ACB Complete with cleaning, alignment, adjustment of gaps between phase to phase, lubricating all moving parts adjustment for smooth mechanical operation etc. complete as required.

Supplying, Laying and fixing of HT -11 KV, 1500/185 sq. mm 3 core XLPE Aluminum Armored power cable i/c connection, Testing etc. complete as required make Havells, Poly Cab.

Tracing of LT cable fault for 1.1 KV grade XPLE/PVC sheathed armored power cable of size between 95 Sq.mm to 400 sq. mm with help of fault locating machine / cable route finder machine including opening of cable termination , including meggering & High Pressure testing before & after making joints etc. as required.

Servicing of 630/800 Amp 11 KV HT OCB / VCB complete with cleaning, alignment, adjustment of gaps between phase to phase, lubricating all moving parts, adjustment for smooth mechanical operation etc. complete as required.

Supply and fixing of 500 Watt Halogen Light for arresting of moister in HT Panel with 3 core 4 sq. mm cable 10 mtr approx., wiring connection testing complete as required.

Servicing and cleaning of 630 to 1600 KVA 11 KV / 415 Volt Dry type transformer i/c flexible joint connection and checking temperature relay for its operation, tightening of HT/LT connection and adjustment of tripping, meggering, high port testing, checking protection etc. complete as required.

Testing and maggering, p.c testing, insulation testing and rectification of moister in bus bar, insulator, and H.T Cable box, Heating of complete P.T, C.T with high voltage testing etc. complete as required.

Checking & arresting of Oil Leakages from 630 to 1000 KVA transformer at Site. The job scope as mentioned includes : a) Dismantling of LT cable’s / Bus- Bar’s connections & dismantling of L.T. Bushing Rods. b) Dismantling of Main Top cover / inspection window of Transformer. After draining of oil of Transformer into drums. ( as per requirement) c) Replacement of Cork rings set along with new Teflon rings of all phases for arresting oil leakages. d) Fixing of all terminals & Bus-bar’s connections & making adjustments. e) Replacement of cork gaskets, oil rings of inspection window side & Buckolz relay side & pipe line also for arresting leakages, if any. f) Re-filling of oil into transformer & examining of leakages for improving breakdown value of oil complete as reqd.

Testing and calibration of IDMT relay set having 2 Nos. O/C. 1 No. E/F & instantaneous element by secondary injection method, cleaning the contacts, resetting with required accuracy complete with checking and set right the wiring etc. complete as reqd. i/c testing of the complete system of HT panel for checking the actual working of CTs their wiring, connected IDMT relay, shunt trip system, breaker's tripping system and for any loose connection by primary injection method in all three phases and at each plug setting at actual time multiplier at site with suitable equipment i/c rectify the different in control wiring etc. if any complete as required.

Supply and fixing of 11 KV HT VCB lower VI with testing etc complete as required.

Supply and fixing of 11 KV HT VCB Shutter assembly with testing etc complete as required.

Supply and fixing of 11 KV HT VCB Rod assembly with testing etc complete as required.

Supply and fixing of 1000 Amp to 1600 Amp LT ACB Mechanisum assembly with alignment, wiring connection testing complete as required.

Supply and fixing of Vacuum interrupter bottle 11 KV 630 Amp. Make Alsthom/ Kirloskar/ Crompton with assembling, connection, high voltage testing complete as required.

Supplying & filling the transformer oil, sealed pack drum including transportation charges etc. ( Make : M/S Power oil /Savita with ISI marked having 50 KV R/C)

Supply & fixing of power pack unit having input 220 Volt AC and out put 24/48/110 Volt DC i/c. making inter connection suitable for existing HT system etc. complete as required.

De- hydration of transformer oil for 400 to 1000 KVA with Filter machine at site to maintain the break down value, die electric strength of oil up to 50 KV including providing oil testing facility at site as reqd.

Supply and fixing of 11 KV HT xlpe Aluminum armored cable joint with testing, complete as required. Make Denson. (a) Indoor Type Joint Size of 150, 185, 240 sq.mm

(b) Straight through type Joint Size of 150, 185, 240 sq. mm

Supplying and fixing of Digital type, Voltmeter up to 500 Volt, suitable size Make:- Trinity / L&T/ Slic, complete with wiring, connection, testing etc. complete as required

Supply and fixing of Digital type, Ammeter up to 2500 Amp. suitable size Make :- Trinity / L&T/Slic etc. complete with wiring, connection, testing etc. complete as required.

Supply and fixing of indication lamp with holder assembly 230 V AC / 24 DC / 48 V DC / 110 V DC, complete as required.

Supplying and fixing of Digital type, KV meter suitable size Make:- Trinity / L&T/ Slic, complete with wiring, connection, testing etc. complete as required

Providing and making of HT Panel control wiring with required wire, thimble etc complete as required.

Less credit on account of dismantled material.

DUBEY ELECTRIC WORKS