REPAIR/ MAINTENACE OF VCB and SERVO VOLATAGE STABILISER AND CONNECTED ITEMS AT DGRE RDC MANALI AT AGE(I) R and D, MANALI

Amount

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 metres deep below normal ground level) with top edge of plate not less than 1.5 metres below normal ground level, connecting to the Galvanised iron strip 25x4 mm by means of bolts, nuts , check nuts and washers of galvanized iron and steel earth wire protected by provision of GI light grade pipe 40 mm bore including provision of concrete pit made from PCC ( 1:2:4) type B-1 (using 20 mm graded stone aggregate) with 40mm thick cover of RCC 1:2:4 reinforced with XPM (Weight not less than 4 Kg/Sqm) and frame of angle iron 40 x 40 x 6 mm and handle of 6 mm dia MS bar made to shape, GI light grade 20 mm bore pipe for watering perforated at bottom, 1.50 metre long placed on top edge of earth plate, common salt & charcoal filling, with fixing arrangement , funnel, wire mesh and earth work in hard/dense soil , returning filling in and removal of surplus soil to a distance not exceeding 50 metres, all as per electrical plate No 5 of SSR 2009 Part-I and connecting to Transformer / Poles all as specified or indicated including testing on complete all as specified and as directed by Engineer-in-Charge.

Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing/connecting as required 25x4 mm galvanised iron strip complete all as specified and directed by Engr-in-charge.

M&L in replacement of synthetic insulating mat of size 2m x 1m x 12 mm complete all as specified and directed by Engr-in-charge.

Material and labour for servicing /testing of breaker/control panel including CT, PT and relays in control panel of VCB of capacity 630 Amps and rating 11 KV complete as details mentioned as under:- (a) Details of servicing of breaker :- (i) Adjustment of mechanism if required. (ii) Clean the circuit breaker to remove dust and dirt. The envelope of the vacuum interrupter and insulating materials shall be wiped with a clean cloth. (iii) Apply a small amount of oil to rotary sections, sliding surfaces, pins, coupling section, etc.use grease for the operating shaft and bearings, and machine oil for other parts. (iv) Check for rust and wear. (v) Check Spring Tension and pitting of the Cluster Contacts. (vi) Visual check for rust and deformation. (vii) Check for loosened bolts and nuts, broken spring washers and snap pins etc. (viii) Check for loosened connections, rust, damaged lead wires. (ix) Check whether the contacts are damaged by arcing. (x) Checking of control circuit & tighten the connections if any. (xi) Check close & trip coil. (xii) Checking of Jaw Contacts Conditions and repair/adjust. (xiii) Replace the jaw contacts,If required. (xiv) Improvement of resistance of epoxy insulator and epoxy body by applying post heated varnish. (xv) Replacement of Dashpot/shock absorbers . (xvi) Replacement of carbon brush of spring charging motor

(b) The following test shall be carried out:- (i) Primary Injection Test of CT / PT (ii) Closing & Opening Timing Test for all three poles. (iii) IR Test with megger in open and closed condition. (iv) Contact resistance test for all three poles (v) Closing coil resistance (vi) Tripping coil resistance. (c) Testing of following relays of control panel with Secondary Injection Kit ,checking and programming of relay :- (i) Over current and earth fault relay (d) Testing of followig Aux relay (i) DC Supply supervision relay. (ii) Master trip relay

S&F in repairs of tripping push button as per sample suitable for VCB/OCB11 KV complete all as specified and directed by Engr-in-charge.

S&F in repairs of closing coil assembly suitable for VCB 11 KV complete all as specified and directed by Engr-in-charge.

S&F in repairs of tripping coil assembly suitable for VCB 11 KV complete all as specified and directed by Engr-in-charge.

S&F in repairs of earth contact assembly suitable for VCB 11 KV complete all as specified and directed by Engr-in-charge.

S&F in repairs of spring charging mechanism assembly suitable for VCB 11 KV complete all as specified and directed by Engr-in-charge.

S&F in repairs of spring charged indicator suitable for VCB 11 KV complete all as specified and directed by Engr-in-charge.

S&F in repairs of ON/OFF indicator suitable for VCB/OCB 11 KV complete all as specified and directed by Engr-in-charge.

S&F in repairs of auxiliary switch suitable for VCB 11 KV complete all as specified and directed by Engr-in-charge.

S&F in repairs of vacuum interreputer bottle 400/630 Amps, 11KV per phase suitable for VCB complete as per sample all as specified and directed by Engr-in-charge. Make: Crompton/ABB/Areva/Siemens.

S&F in repairs of moving contact assembly suitable for VCB 11 KV complete all as specified and directed by Engr-in-charge.

S&F in repairs of fixed contact assembly suitable for VCB 11 KV complete all as specified and directed by Engr-in-charge.

S&F in repairs of motor & gear assembly for spring charging suitable for VCB 11 KV complete all as specified and directed by Engr-in-charge.

S&F in repairs of main shaft inter lock assembly suitable for VCB 11 KV complete all as specified and directed by Engr-in-charge.

S&F in repairs of space heater with thermostat suitable for VCB 11 KV complete all as specified and directed by Engr-in-charge.

S&F in repairs of power pack unit suitable for 230 volts, 50 Hz AC input voltage and 3 Nos of output voltage i.e. 110, 24 & 12 volts DC complete with battery back up (minimum 2 Nos x 7 AH capacity battery) suitable for operation of HT VCB 11 KV matching with existing system complete all as specified and directed by Engr-in-charge.

S&F in repairs of ON/OFF switch with NO/NC contact suitable for VCB/OCB 11 KV complete all as specified and directed by Engr-in-charge.

S&F in repairs of indicating lamp LED type in red, yellow, blue suitable for VCB 11 KV Panel complete all as specified and directed by Engr-in-charge.

S&F in repairs of indoor type 3 phase 11KV/110V potential transformer, 12KV, 50 Hz, earthed type, draw-out type with accuracy class 0.5 for metering & protection, rated burden both winding 100VA, hermetically sealed to eliminate breathing and prevent air & moisture, secondary terminal should be partitioned so as to house the metering terminals separately from protection & various terminal connectors providing sufficient earth clearance complete all as specified and directed by Engr-in-charge. Make: Crompton Greaves/ABB/Areva

S&F in repairs of 11 KV current transformer, cast resin type, 50 Hz with ratio of 600-400/5 Amps having protection & metering core, 15 VA burden or as matching with existing, class 1.0 of minimum breaking capacity 13.10 KV for 1.0 second complete all as specified and directed by Engr-in-charge.

S&F in repairs of master tripping relay suitable for protection/tripping of HT 11 KV VCBs Panel including carry out necessary modification in existing panel complete all as specified and directed by Engr-in-charge and directed by Eng-in-Charge. Make: Crompton Greaves/Areva/Siemens.

S&F in repairs of electromechanical type over current relay (inverse) type, CDG type with range 2.5 to 10.0 Amps in 7 steps suitable for protection/tripping of HT 11 KV VCBs/OCBs Panel including carry out necessary modification in existing panel complete all as specified and directed by Engr-in-charge. Make: Areva/English Electric/Alstnom.

S&F in repairs of electromechanical type earth fault relay (inverse) type, CDG type with range 1.0 to 4.0 Amps in 7 steps suitable for protection/tripping of HT 11 KV VCBs/OCBs Panel including carry out necessary modification in existing panel complete all as specified and directed by Engr-in-charge. Make: Areva/English Electric/Alstnom.

Material and labour for Preparation of old painted surfaces of steel by brushing/cleaning stain, greasy spots with thinner, applying two coats of synthetic enamel paint by spray machine on all sides of 11 KV VCB panel including writing of MES /SM No and details of feeder as directed by Engr-in-charge on graphic plastic sheet complete all as directed .

Supplying ,fixing & testing in replacement PT fuse failure relay , 50/24 Volt DC in control panel including wiring complete as directed at site

Supply, Installation,testing commissioning of following items/spares in the existing panel of automatic power factor improvement (outdoor) capacitor bank having aggregate capacity 100 KVAR (As per site requirment) in different stage with microprocessor along with factory made type panel board including taking down old/unservicable following parts complete all as specified and directed.

Power factor corrector relay 8 to 12 stage

Capacitor duty contactor for 25 KVAR

Capacitor duty contactor for 10 KVAR

Capacitor duty contactor for 5 KVAR

ON-OFF push button

Aux Contactor 4 No + 4 NC

Indicating lamp ON-OFF

Capacitor 25 KVAR ultra heavy duty MPP type having tolerance 0% with discharge device resistor

Capacitor 10 KVAR ultra heavy duty MPP type having tolerance 0% with discharge device resistor

Capacitor 5 KVAR ultra heavy duty MPP type having tolerance 0% with discharge device resistor

Digital voltmeter 0-500 V with VSS

Digital Ammeter 0-400 A with VSS & CT

M&L for servicing of servo voltage stablizer by Collecting the unserviceable three phase voltage stabilizer of capacity 250/400 KVA of any make/type from site, taking to local workshop for repair and open the stabilizer, taking out unserviceable spare part including replacement of the same with new one, replacement of requisite internal wiring and re-assembling the stabilizer, testing complete and re-locating the same at its original position including making all electrical connection complete all as specified and diirected. Note:- Unserviceable spare parts shall be measured and paid separately as "supply only".

Supply only in replacement of relay for voltage stabilizer suitable for 250/400 KVA capacity complete all as specified.

Supply only in replacement of printed circuit board (PCB) consisting diode, resistance, capacitor complete suitable for 250/400 KVA voltage stabilizer complete all as specified.

Supply only in replacement of copper wound main transformer suitable for 250/400 KVA voltage stabilizer complete all as specified.

Supply only in replacement of copper wound dimmer transformer suitable for 250/400 KVA voltage stabilizer complete all as specified.

Supply only in replacement of ammeter analog type 0 to 150 Amps (as per sample) complete all as specified.

Supply and filling of new transformer oil (in sealed barrel) for toping up, having die-electric strength 40-60 KV after initial de-hydration complete all as specified.

M&L for Servicing of complete APFC panel 100 KVAR including cleaning of the terminal and coil and incoming & outgoing connections fixed with high tensile nut and bolts fixed and associated wiring of the auxiliary blocks and Manual functional testing of the Panel after servicing by directly giving command from the terminal blocks with all required tools, manpower and Assembling the panel after servicing , closing and mounting of all components. Cleaning of the Panel with Vacuum cleaner/blower ensuring that no control and power wiring is disturbed during the work complete all as specified and directed by Engr-in-charge.

M/s A.K. ENGINEERS (BID ID -3349968)

R. P. Suppliers and Construction Co. (BID ID -3346586)