REPAIR REPLACEMENT AND MAINTENANCE OF DISTRIBUTION TRANSFORMER, HT SWITCH GEARS AND LT CABLE NETWORK SYSTEM WITH CONNECTED ITEMS AT POCKET NO 17 OF GE U ELECT SUPPLY, DELHI CANTT

Amount

Material and labour for servicing /testing and calibration of breaker/control panel including CT, PT and relays in control panel of VCB/OCB of capacity 800/630/400 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 Note:- Test report shall be laminated to control panel of respective breaker.

S&F in replacement of panel door lock suitable for 400/630/800 Amps , 11 KV HT VCB complete all as specified and directed.

S&F in replacement auxillary switch (7 No + 7 NC) suitable for 400/630/800 Amps, 11 KV VCB complete all as specified abd directed.

Supply and fix in replacement T&C switch for breaker ON/OFF purpose in HT 11 KV VCB panel including associated wiring, if reqd, for proper functioning of switch complete all as specified and directed.

S&F in replacement support road with screws suitable for 400/630/800 Amps 11 KV VCB complete all as specified and directed.

S&F in replacement support insulator suitable for 400/630/800 Amps 11 KV VCB complete all as specified and directed.

S&F in replacement of isolating contact assembly suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

S&F in replacement of fixed contact block complete suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

S&F in replacement of moving contact block complete suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

S&F in replacement of motor & gear assembly 230V AC suitable for 400/630/800 amps, 11 KV HT VCB including testing & puting on load complete all as specified & directed.

S&F in replacement of spring bearing gear suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

S&F in replacement of closing coil assembly 24 volts DC suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

S&F in replacement of tripping coil assembly 24 volts DC suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

Supplying & Fixing in replacement support insulator suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

Supplying & Fixing in replacement upper connector suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

Supplying & Fixing in replacement lower connector suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

S&F in replacement, hooter complete with switch etc. suitable for warming HT 11 KV VCBs internal chambers (as in existing) complete all as specified and directed

S&F Shunt trip asly 24 V/110 V DC complete all as specified and directed .

Material and labour for repair/maintenance of bus bars inside HT 11 KV panels, by removing old burnt out insulation tapes and dust layers, cleaning with CRC/thinner and drying properly. Insulating the bus bars with HT 11 KV insulation tapes making arrangements for dust and vermin proof to the HT 11 kV panels at different locations complete all as specified and directed.

Supplying and fixing Current Transformers draw type 11kV, 300/150/1-1, Core1: Class 5P10, 10VA, Core2: Class 0.5, 10 VA . Note : The item shall beintegrated in HV compartment of VCB assembly through wiring for implementation of protection VCB the rate of the same deemed to be included in quoted rate.

Supplying and fixing Current Transformers draw type 11kV, 200/100/1-1, Core1: Class 5P10, 10VA, Core2: Class 0.5, 10 VA . Note : The item shall beintegrated in HV compartment of VCB assembly through wiring for implementation of protection VCB the rate of the same deemed to be included in quoted rate.

Supplying and fixing Current Transformers draw type 11kV, 100/50/1-1, Core1: Class 5P10, 10VA, Core2: Class 0.5, 10 VA . Note : The item shall be integrated in HV compartment of VCB assembly through wiring for implementation of protection VCB the rate of the same deemed to be included in quoted rate.

Supplying and fixing Potential Transformers, Draw-out type in existing HV panel for easy maintenance, 11kV/rt3:110V/rt3, 50VA, Cl.0.5 with associated gun-type HRC fuses and MCBs for HT/LT isolation Note : The item shall be integrated with HV compartment of VCB assembly through wiring for implementation of metering of VCB the rate of the same deemed to be included in quoted rate.

Supplying and installation of Relay and metering panel in existing HV compartment factory made 2.0 mm thick IP 54 mounted to be mounted on VCB HT compartment comprising of following:-

(a) Main Protection Relay:- (i) Main protection Numerical Relay draw out type in HT 11 KV VCB Panel comprising of new and modern numerical scheme for detecting, indicating and tripping the breaker on faults over-current and earth-fault in any of the three phases, Trip circuit supervision relay, 5% pick up for OC and 5% for EF. The relay shall also have the following features as minimum; (i) Programmable rated current 1A & 5A, (ii) Last 8 fault record & 200 event record with time stamping, (iii) 4 analog CT & 3 PT input, 8 DI & 8 DO, (iv) Communicable on IEC61850 protocol, (v) Disturbance recording upto 300 cycles, (vi) Self supervision function. The relay shall be fully integrated with the feeder, internally capturing feeder statuses if available including Breaker On, Off, Spring Chrgd, Test, Service, AC-Fail, Trip circuit healthy relay, PT supervision, Master trip relay, local remote and display the same locally on a built-in LCD screen and suitably labeled status LEDs. Relay shall have facility to locally Trip/Close the breaker as a backup to TNC switch provided separately on the panel.

(b) Metering Equipment including:- (i) 01 x Digital Voltmeter (Acc.Cl.0.5), 01 x Digital Ammeter (Acc.Cl.0.5), (ii) 01 x Multi-Function-Meter (Acc.Cl.0.5) shall be provided with LCD display for measuring current, voltage, power, power-factor and energy-parameters, Total Harmonic Distortion and Max. Demand Indication, same shall be communicable on ModBus via RS485 port. (c) LED Indications :- (i) Breaker ON/OFF/TRIP/Spring-Charged, (ii) Trip Circuit Healthy (iii) R-Y-B (iv) DC available LED with push button. (v) AC Supply fail.

(d) 08-Window Annunciator with Hooter to indicate following alarms :- (i) OC Trip, (ii) EF Trip (iii) Trip Circuit Failure, (iv) Inter-Tripping Fault, (v) PT Fuse Failure The Annunciator will be complete with required Acknowledge/Test buttons as required (e) Flush mounted Auxillary Protection Relays incl:- (i) Trip Circuit Supervision Relay (ii) Master trip Relay (iii) PT Fuse failure relay. (iv) DC Supervision Scheme

Disconnecting electrically and mechanically indoor/outdoor transformer capacity upto 630 KVA from HT/LT terminals and lowering down/getting out from 2/4/6 pole structure/plinth or inside sub station for major repairing/minor repair complete all as specified and directed .

M&l for draining out complete transformer oil from transformer of upto 630 KVA capacity at site which found major repair and storing the oil in suitable container (container to be provided by the contractor to keep aside for re-use (after repair) and lifting of core assembly by opening of top cover and other items for inspection/examination of core assembly, after mainor repairs its fixing in original position, or for major repairs transformer to make it ready for transportation to carry out rewinding work in workshop (Transportation charges shall be borne by the contractor against item No 27 to 30 of schedule ‘A’ here in after)

M&L for transportation of unserviceable transformer of capacity upto 630 KVA from site to workshop and return back for installation it on original position/location after repairing from workshop (Rate is deemed to be inclusive of transportation, T&P and man power) complete all as specified and directed .

Shifting of serviceable transformer of capacity upto 630 KVA from MES store Yard/Sub Stn (indoor/outdoor) for installation in place of unserviceable transformer and back after replacing with repaired transformer

M&L labour for alternative arrangement by hiring, transportation of transformer of capacity upto 250 KVA in place of unserviceable transformer on hire basis for 15 days including, installation, connecting and testing of transformer and return back after installation of repaired transformer complete all as specifed and directed. Note : (i) Repairing of transformer have to be completed within 15 days no extra cost will be paid toward hiring charges beyond 15 days . Moreover contractor shall not be allowed to shift the hired transformer until it is replaced by the repaired transformer . In case any fault /burning /peeling of painting and any other defects occured in hired transformer the contractor shall have to made good himself from his own expenses. (ii) Contractor should check the available infrasturcture and to be sure regarding safety of hired transformer before installation . The rete quoted is deemed to be include transportation cost, earthing lead etc. (iii) In case the defective transformer not repaired & installed on its site within the specified period of 15 days from the date of handing over to contractor a panelty recovery @ Rs 1000 /- per day will be charged from his dues. During this period contractor shall not be allowed to shift the hired transformer until it is replaced by the repaired transformer . No extra cost beyond 15 days will be paid to contractor on this account.

All as per item No 29 here-in -before but capacity of transformer 315 to 630 KVA.

Taking down the unserviceable copper wound from transformer of capacity upto 250 KVA, opening top cover, and carrying out the following work complete all as specified and directed :- (a) Dismantling of all attachment viz breather assembly, conservator, oil temperature gauge, HT/LT bushing etc. and keeping aside for reuse. (b) Taking out the core with winding assembly. (c) Removing of complete winding from core and dismantling the core, cleaning of core laminate sheet and keeping aside for reuse (d) Cleaning of complete transformer tank oil fins, removing of sludge, and making the inside surface of tank dry by blowing of hot air as directed and specified. (e) Painting of outside surfaces of transformer complete by means of spray machine as directed.

All as per item No 31 here-in -before but capacity of transformer 315 to 630 KVA.

(a) Repairs to the transformer of capacity upto 250 KVA as follows :- (i) Rewinding of HT/LT leg coil complete using copper wire /strip of appropriate gauge, size and turn as per existing with double paper coated insulation including all requisite insulating materials like packing sleeves, separator, tapes etc. heating, varnishing the core and winding assembly after framing up top and bottom steel structure of transformer all as specified and directed. (ii) Replacement of all insulating materials other than incorporated for rewinding of HT/LT coils as per existing. (iii) Fixing only HT procelain bushing with studs, nuts, washers 3 Nos. and LT procelain bushing with studs, nuts, and washers 4 Nos. and connection with primary and secondary windings and reconnecting with the main terminals as required and directed. (iv) Fixing only breather assembly, conservator, oil temperature gauge after proper cleaning, minor repairs etc. as required and directed. (v) Replacement of all unserviceable gasket from top cover, HT/LT bushing with new one by using rubberised gasket sheet 4.0mm/6.0mm thick duly pasted with suitable adhesive . (vi) Replacement of unserviceable bolts with new one and fixing of existing serviceable bolts, nuts, washers of different sizes and tightening properly. (vii) Repositioning of core and winding assembly inside the tank, assembling complete unit and making the transformer ready for filling oil and subsequent testing as directed. (b) Disconnecting the alternative transformer, taking down the same, Re-installation of repaired indoor/outdoor transformer on 4/6 pole structure/plinth/inside sub station, connecting electrically and mechanically, testing and commissioning complete all as specified and directed. (c) The contractor shall give written warranty of one year from the certified date of completion for the repaired transformer. Note :- HT/LT leg coils and transformer oil required for top up shall be measured and paid separately under relevant items of this Schedule here-in-after as supply only.

All as per item No 33 here-in -before but capacity of transformer 315 to 630 KVA.

Supply only in replacement of HT coils with super enamelled copper wire /DPC of high quality duly matching with the existing guage and impedance.

Supply only in replacement of LT coils with super enamelled copper wire strip/DPC of high quality duly matching with the existing guage and impedance.

M&L for ON load Centrifuging and dehydration including filteration and cleaning of transformer oil by dehydration machine of 11/0.433 KV transformer at site and topping up deficient transformer oil including testing of samples before and after dehydration and filteration complete all as specified and directed. Note :- Deficient quantity of Transformer oil required for top up shall be measured and paid separately under relevant items of this Schedule here-in-after as supply only.

Supply only transformer oil of approved quality as per IS having dielectric strength of 45-60 KV in 2.5mm gap for filling in transformer or for topping up as required and directed

Supplying and fixing in replacement (at site/workshop), Porcelain Transformer bushing on LT (440 Volt) side, including brass stems conical bush and gasket after disconnecting electrically and mechanically for indoor/outdoor transformer of capacity upto 250 KVA and re-connecting electrically and mechanically, testing complete all as specified and directed. Note.The rates quoted is deemed to be included the cost of necessary labour charges for draining out & re-filling transforer oil, opening of top cover by unscrewing nut, bolts washers and suitable size pad type bus bar almuminium and nut bolt washers etc.

All as per Serial item No 39 here-in-before but capacity 315 KVA to 630 KVA

Supplying and fixing in replacement (at site/workshop), Porcelain Transformer bushing on HT (11 KV) side, including brass stems conical bush and gasket after disconnecting electrically and mechanically for indoor/outdoor transformer of capacity upto 250 KVA and connecting electrically and mechanically, testing complete all as specified and directed. Note.The rates quoted is deemed to be included the cost of necessary labour charges for draining out & re-filling transforer oil, opening of top cover by unscrewing nut, bolts washers and suitable size pad type bus bar almuminium and nut bolt washers and reconnection

All as per Serial item No 41 here-in-before but 315 KVA to 630 KVA

Supplying and fixing in replacement, Silica Gel Breather assembly including vent pipe and Silica Gel for indoor/outdoor transformers, capacity upto 250 KVA complete all as specified and directed.

All as per Serial item No 43 here-in-before but capacity 315 KVA to 630 KVA

Supply and fixing 3mm thick Sheet glass (each not exceeding 0.9 Sqm) ordinary quality and glazing with oil putty on cabin of OTI and WTI gauge of transformer upto capacity 630 KVA complete all as specified and directed.

Supply and fixing Thermometer of transformer capacity upto 630 KVA complete all as specified and directed.

Material & Labour for painting of transformer of capacity upto 250 KVA with existing colour, with spraying machine, after cleaning, preparation of outer surface of transformer, including writing of SM No, MES and capacity of transformer complete all as specified and directed.

Material & Labour for painting of transformer of capacity 315 to 630 KVA with existing colour, with spraying machine, after cleaning, preparation of outer surface of transformer, including writing of SM No, MES and capacity of transformer complete all as specified and directed.

Earthing complete with galvanized steel earth plate electrode of size 60cmx60cmx6 mm thick, buried directly in ground (earth pit not less than 3.5 m below normal ground level) with top edge of earth plate not less than 2.5m below normal ground level, connected to galvanized iron strip 32X6 mm by means of electric arc welding of galvanised iron or steel as shown in electrical plate No 3 of SSR Part I, connected to earth test point and the equipment on the other side complete all as specified, including testing and commissioning complete all as directed. Note : (a) The unit rates quoted against this item shall be deemed to include the cost of excavation and earth work in any type of soil, common salt & charcoal dust in alternate layers, PCC 1:3:6 as in pit, precast RCC 1:2:4 type B-1 with necessary reinforcement as in cover & frame for pit, funnel, watering pipe 20 mm bore GI pipe light grade, protection pipe 40 mm bore GI pipe light grade etc. (b) The quoted rates shall also deemed to include the cost of earth test point and earth strip/GI earthing and protection pipe upto 7.5 meter beyond the earth plates electrode.

M&L 32x6mm galvanised iron strip for earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in pipe or any other indicated situation for loop earthing etc complete all as specified and directed.

Disconnecting electrically & mechanically outdoor transforemrs upto 630 KVA capacity, lowering down/getting out from plinth carefully for repairing /making of plinth of transformer and re- connecting electrically and mechanically after repairing/making of plinth , testing and commissioning complete all as specified and directed. Note:- (a) The rates quoted is deemed to be included for hydra, men power and other items required for temp energization of transformer.

Disconnecting electrically & mechanically indoor/outdoor transforemrs upto 250 KVA capacity, lowering down/getting out from plinth, 4/6 pole Structure carefully for prevednt/stoping for leakage of transformer oil (at site/sub station) including opening of top cover, draining out transformer oil and other items and storing the oil in suitable container (container to be provided by the contractor to keep aside for re -use) including replacement of all unserviceable gasket, after repairing/stoping of oil leakage the same re-connecting electrically and mechanically, testing complete all as specified and directed Note.The rates quoted is deemed to be included the cost of necessary labour charges for draining out & re-filling transforer oil, T&P, hydra, gasket, opening/closing of top cover by unscrewing nut, bolts washers etc.

All as per item No 52 here in before but of capacity 315 KVA to 630 KVA

Supply and fill in replacement silica gel for transformer complete all as directed

M & L for two coats of synthetic enamel paint of silver colour on wire mesh surfaces including preparation of surfaces complete all as specified.

M&L in replacement of HT jumper on 2/4/6 pole structure complete with RYB sleeve complete all as specified.

M & L for tree cutting arround upto 8 mtr away from transformer & 2/4/6 pole structure complete all as specified.

Material and labour for cleaning of 2/4/6 pole structure for loose filling under 2/4/6 pole structure / along the transformer plinth in side the fencing area after cleaning/surface excavation including taking out grass/herbs.

M&L Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of 120 sqmm to 185 sqmm complete all as specified..

M&L Cable end jointing kit for 11 KV (Earthed) grade indoor type heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 240 Sqmm to 300 Sqmm complete all as specified..

Supply and fix Heat shrinkable sleves of size 1/4" to 1/2", Temp 120Degree C, 1 KV. Make 3M/Raychem.

M& L for epoxy resin cast coated on existing currtent transformer to increase the insulation level of CT complete all as specified and directed.

Supply only CRC powerspray liquid 500 ml bottle industrial type. (electro maintenance and protection).

NOTE :-(i)contractor should provide 50 % of the material as listed above within 15 days of the placing of work order and shall be verified by the Eng-in-charge.

M P TYAGI ENGINEERS AND CONTRACTORS

Buddham Builders

Vijay Electricals