REPAIR/MAINT OF 33 KV YARD , POWER TRANSFORMERS,33 KV/11 KV BREAKERS AND CONNECTED ITEMS AT OLD MRS AND NEW MRS IN THE AREA OF AGE E/M EXT (ELECT) UNDER GE E/M LUCKNOW.

Material and labour for perodical servicing ,repairing & testing of 33 KV outdoor VCB including relay and control panel of capacity 800/400 Amps and rating 36 KV complete as details mentioned as under:- (a) Details of periodical servicing of breaker :- (i) Checking of Closing/Tripping coil assembly (ii) Adjustment of mechanism if required. (iii) 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. (iv) Checking the contact for wear. Replace if the contact piece has worn out. (v) 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. (vi) Check for rust and wear. (vii) Checking of spring charge mechanism (viii) Visual check for rust and deformation. (ix) Check for loosened bolts and nuts, broken spring washers and snap pins etc. (x) Check for loosened connections, rust, damaged lead wires including repacement of vintage control wiring. (xi) Checking of control circuit & tighten the connections if any. (xii) Check close & trip coil. (xiii) Replacement of Dashpot/shock absorbers . (xiv) Replacement of carbon brush of spring charging motor (xv)Cleaning of porcelain bushing (xvi)Checking of limit switch

Supplying , installation & testing in replacement Isolator (horizontal type ) suitable for oudoor type three phase double break,centre rotating type suitable manual operation 3 moving contact of all isolator (roatate through 90 degree from their fully collosed position to fully open position so that the break is distinct and clearly visible from ground lever conforming to IS 9921/IEC-62271-102, phase, rated nominal/ maximum rated voltage 33/36 KV, rated current 1250 Amp including taking down old unserviceable isolator etc complete as specified and directed

Supplying , installation & testing in replacement a single piece non linear resister type lightening arrester suitable for three wire 33 KV overhead lines with rated voltage of 33 KV (rms) 10 KA descharge current with a (station class) with clamp, bolts, nuts and washers as required including taking down of old unserviceable lightening arrester.

Supply installation, testing in replacement Potential Transformer (PT) oil cooled out door single phase ( Earthed type) of voltage ratio 33 KV/110 V class 3P - 0.5-3, burden 50 VA insulation level of 70/170 KV as specified below:- (a) Normal System Voltage-33 KV (b) Highest System Voltage-36 KV (c) Rated Primary voltage- 33 KV/√3 (d) Rated secondary voltage- 110 V/√3 (e) Nos of Lt winding 2 (f) Metering Core Accuracy class - 0.5 (g) Metering Core Rated Burden- 50 VA (h) Nos of Phase- Single (Earthed Type) (j) Protection core accuracy class - 3P (k) Protection core rated Burden - 50 VA (l) Rated Voltage Factor - 1.2 continuous & 1.5 for 30 Sec (m) Insulation Level- 36/70 KV.170 KVP (n) Temp rise at rated contineous thermal current over ambient at site - 45 0C (o) Porcelain Bushing type - Hollow Cylinder (p) 1.2/50 mcro second impulse withstand test vol -170 KV (Peak) (q) Creepage distance of HV bushing - 900 mm (min) (r) Primary & Secondary winding material - Copper

Supply, installation, testing in replacement 33 KV current transformer oil cooled out door single phase, oil immersed and self cooled type of ratio 100-50/5-5-5-5/1-1-1-1 suitable for metering and protection equipment installed on control panels terminal block as specified below :- (a) Normal System Voltage-33 KV (b) Highest System Voltage-36 KV (c) Rated Primary current- 100-50 Amp (d) Rated secondary current- 5 Amp/1 Amp (e) Nos of Core - 4 (f) Core01: Accuracy class 5P10, 10VA, ALF ≥10 (g) Core02: Accuracy Class 1.0, 10VA, ISF ≤ 5 (h) Core 03 Protection core accuracy class -PS,Protection knee point voltage- 300 Volt at lower ratio (j) Core 04-Spare (k) Continuous thermal current rating 120 % of rated primary current (l)Temp rise at rated contineous thermal current over ambient at site - Less than or equal to 45 degree C (m) Insulation Level- 36/70 KV.170 KVP (n) 1.2/50 Micro second impulse withstand test voltage- 170 KV (peak) (o) Short time thermal current rating for one second - 25 KA/1 Second (p) Dynamic Current Rating - 62.5 KA ( peak) (q) Porcelain Bushing type - Hollow Cylinder (r) Creepage distance of HV bushing - 900 mm (min) (s) Primary & Secondary winding material - Copper

Supplying , installation & testing in replacement Post insulator suitable for rated nominal/ maximum rated voltage 33/36 KV, rated current 1250 Amp including taking down old unserviceable Post insulator complete as specified and directed.

M&L for periodical servicing, repairing & testing of HT Potential Transformer (33 KV / 110 Volt) by cleaning of bushing and terminal of HT potential transformer 33000 / 110 volts (outdoor type) by CTC liquid and checking of oil level incl rectify the any leakage and proper connection checking and testing with following :- (i) Insulation resistance test between phase to phase & phase to earth (ii) Checking output voltage (iii) Testing the oil dielectric strength (BDV test) Note- . The rates for Nuts, bolts, washers, lugs, thimble, wires and minor items required for efficient and smooth functioning of the equipment shall deemed to be included in in the quoted item. Rates for testing equipments and accessories required at site for condcuting above tests shall deemed to be included in quoted rates by contractor.

M&L for periodical servicing, repairing & testing of HT 33 KV Current Transformer (CT) by cleaning of bushing and terminal by CTC solution of CT rating 100 / 5 + 5 + 1 Amp rating, 33 KV and checking of oil level , rectify the leakage if any and testing the oil strength (BD test) and proper connection checking and testing with following :- (i) Insulation resistance test between phase to phase& phase to earth. Note- . The rates for Nuts, bolts, washers, lugs, thimble, wires and minor items required for efficient and smooth functioning of the equipment shall deemed to be included in in the quoted item. Rates for testing equipments and accessories required at site for condcuting above tests shall deemed to be included in quoted rates by contractor.

M&L for periodical servicing, repairing & testing of line isolator, 33 KV (Horizontal type) ,Servicing of line isolator (Horizontal break outdoor type) including cleaning of contact (knife) by CTC liquid proper oiling greasing on contacts & moving rod / handle for proper function of moveable rod for smooth ON / OFF position and checking,tightining the incoming and outgoing connection (terminal lugs to be replaced if required as per existing size with GI nut bolts,washer) and testing with following :- (i) Insulation resistance test between phase to phase & phase to earth . (ii) High voltage test of isolator as directed by Engr -in-Charge. Note- . The rates for Nuts, bolts, washers, lugs, thimble, wires and minor items required for efficient and smooth functioning of the equipment shall deemed to be included in in the quoted item. Rates for testing equipments and accessories required at site for condcuting above tests shall deemed to be included in quoted rates by contractor.