Annual Stage Contract for Carrying out Preventive Routine Breakdown Maintenance of various 132 BY 33kV Grid Sub stations AND allied 132kV Transmission lines falling under the jurisdiction of this division

Part: (A) 132kV Transmission Lines ( Preventive & Breakdown Maintenance)

Checking and tightening/replacement of jumper.

Replacement of damaged disc insulators.

a) Tension String comprising of 1 to 11 no of discs.

b) Suspension string comprising of 1 to 11 no of discs.

Repairing of one No. power conductor when lowering of conductor is necessary. Complete job including laying of conductor, making of compression joint, if any, rough sagging ,tensioning of conductor, fixing dead-end assembly and jumpering etc.( Complete Job, span length upto 500 meters tension to tension.)

Repairing of earth wire when lowering of Earth wire is necessary (Complete job) including compression joint if required. Laying of earthwire,tensioning ,dead-end assembly etc. span length upto 500 meters tension to tension point.

Tightening of Nuts and Bolts of tower superstructures and replacement of missing nuts and bolts.

A) Tower weight up to 2 tones

B) Tower weight more than 2 tones up to 4 tones.

C) Tower weight more than 4 tones up to 7.5 tones.

D) Tower weight more than 7.5 tones

Checking/ tightening of tower footing earthing bolts and measuring tower footing resistance of five towers.

Replacement of missing tower members, including fabrication of missing members and their fixing/ placing in position complete job

Branch cutting in a corridor width of 16 meter .

Tag welding of 132 KV towers bottom section ( First two sections) wherever required.

Part (B) 132 / 33 KV Grid Stations (Preventive Maintenance)

Power Transformer :-Checking of auto starting of fans/ pumps, hand operation of all taps, including handle interlock switch, local and remote operation of accessories, WTI/OTI indications. Inspection and testing of transformer including drying/ replacement of silica gel, checking of buchhloz relay, conservator oil level indicator, temp. sensors, topping of oil, cooling system, alarm / trip circuit. Measurement of IR Values, dielectric strength of transformer oil and BDV of oil, checking of marshalling box of OLTC,NGR, T.B of PDR, Bucholz relay, External cleaning of radiators, bushings etc.

A) 10 MVA to 20 MVA

B) 20 MVA to 50 MVA

Repair/ rewinding of three phase transformer cooling fan including replacement of damaged winding, bearing etc.

Circuit Breaker

SF6 Breaker(132KV) :-Checking of auto starting of air compressor, oil pressure drop during duty cycle operation check, Checking of auto-starting / stopping of oil pump,pressure switch setting,etc, Checking of healthiness of accumulator by checking the pre-charging pressure when building up pressure from zero, Checking of operation of safety valve, Cleaning of breaker units, checking of protection equipments and replacement of defective ones, i.e., complete inspection and testing of SF6 type circuit breakers inclusive of operating mechanism. Maintaning gas levels, venting of circuit breakers etc.

VCB(33KV):-Checking of pressure settings of switches, pole discrepancy relay, interlocks, operational lockouts, driving mechanism (hydraulic/pneumatic) close/ trip coils, healthiness of operation counter, terminations of MB, door sealing gaskets, duty cycle operation including rapid re-closing , functioning of space heater/ illumination. Cleaning of breaker pole, support insulators, PIR and grading capacitor, interrupter chamber, control cabinet. Re-painting of metallic surfaces if required .Complete inspection of contacts and adjustment of various clearance including draning and re-filling of oil and nitrogen gas.

Current Transformer:- Checking /cleanliness and tightness of all electrical connections including earthing of marshalling box ,CT secondary terminal ,healthiness of secondary terminal bushing .Checking of oil level .Measurement of IR Value and tightening of jumpers, filling of nitrogen gas and tightening of jumpers.

A) 132 Kv Set of 3 Nos

B) 33 Kv Set of 3 Nos

C.V. T./ P.T's :-Checking of earthing of HF point, breakage or cracks in HF bushing ,neutral earthling in CVT ,healthiness of all gaskets and oil level .Cleaning of CVT capacitor stacks, marshalling box and junction box ,space heater and illumination .Measurement of IR value and tightening of all connections and droppers, filling of nitrogen gas.

A) 132 Kv Set of 3 Nos

B) 33 Kv Set of 3 Nos

Surge Arrestor:-Checking of leakage current(third harmonic resistive current), Testing of counters and leakage current meters, Cleaning of insulators, Checking of earth connections between surge arrester,surge monitor and earth, Checking of leakage current after cleaning of porcelain surface, cleaning of LA insulators. Measurement of IR value and tightening of droppers and testing of counter and leakage of current meters, Cleaning of insulators, Checking of earth cennections between surge arrester, Surge moniter and Earth.

A) 132 Kv Set of 3 Nos

B) 33 Kv Set of 3 Nos

Isolators:-Maintenance of linkages including transmission gears, stopper bolts. Cleaning of auxiliary switch contacts and greasing with silica grease, cleaning of support insulators ,termination contacts, checking of electrical /Mechanical interlocks with E/S & CB,mounting bolts, alignment ,nuts, pins, space heater and illumination ,healthiness of gaskets, auxiliary contacts ,alignment of earthing blades, operation of earth switch, aluminum /copper flexible conductor, earth connections of structures and MB .Lubrication of operating mechanism, hinges, lock joints, levers, bearings ,main contacts, cleaning of post insulators,tightning of clamps etc.

A) 132 Kv Set of 3 Nos

B) 33 Kv Set of 3 Nos

Column and beams:-Tightening of all nuts/bolts and providing of missing nuts/bolts and damaged members

A) 132 Kv Bay

B) 33 Kv Bay

Bus Bar:- Replacement of Damaged /burnt droppers or jumpers. Upto 3 Nos

Bus Bar:-Replacement of bus bars of single conductor with size upto 0.4 Sq inch copper equivalent including replacement of disc insulators if required. Tightening of Clamps/Jumpers/droppers etc. Upto 03 Strngs

Bus Bar:- Replacemnt of Damaged Disc insulators.upto 03 strings

Illumination System:-Checking of healthiness of fittings in Station buildings, out door switch yard, repairing and replacement if required, lighting of pannels.Tightening of terminals, maintenance/repairs of high-mast lights etc including repairing to the wiring of these equipments.

Battery bank:-Checking and cleaning of battery cell terminals, application of petroleum jelly, if required, conducting of battery impedance test and discharge test checking voltage,temperature,current ,sp.gravity of individual cells as well as terminal voltage.

Battery charger.:-Checking of control cards, measurement of test point voltage values, testing of D.C earth fault and U/V relays, I.R.measurement of charger transformer checking of earthing etc.Checking of charger panel /D.C .D.B for electrical connections, cleanliness etc.

Protection System:-Checking of relays and application of CCL4 for cleaning if required, carrying out relay testing of one single Bay 132 KV or 33 KV including through checking of subject CT's and Relays, replacement of worn out contacts of relays, testing of event logger/disturbance recorder if any, checking and replacement of control wiring if required ( Complete Job for Single 132 KV or 33 KV Bay)

L.T.Switchgear/Auxiliary Transformer:-Checking of all connections, tightening and replacement of wiring if required, testing of BDV oil of aux.transformer, I.R measurement. Functional checks ( Trip/ Close) and operating time measurement of MCB's checking of all motors for normal functioning with cleaning and replacement of worn out wiring etc ( Complete Job)

Earthing Mat:-Measurement of earth resistivity ,checking of electrical continuity of equipment earthings, tightening of earthing connectors, removal of rust from bottled earth connectors and tightening (132/33 KV yards).

D.C.Distribution Board:-Checking of connections , wiring ,replacement of wiring if needed and checking of healthiness of all the D/C lights

Deweeding of the switch yard, store yard including cutting of wild vegetations and thorny bushes,herbs and shrubs and also displacement of material in Divsional Stores and Yards where-ever required for hassle free dweeding etc.

DG Sets:- Maintenance of DG Sets including cleaining of oil and air filters, checking of exhauste system of DG sets, tightening of all mechanical equipments and all electrical connections etc

Maintenance of ATS Switches,Fire Alarm Systems by way of replacement of faulty part or equipment, checking of all connections, tightening of all connections( Complete Job).

Maintenance of dewatering Motors/Pumps, checking of all electrical connections, tightening of all mechanical joints properly, greasing of shafts,bearings wherever required including replacement of burntout coils etc

Shunt Capacitor Bank:- Maintenance of Shunt capacitor Banks Including Checking of shunt capacitors, tightening of all the connections,joints including maintenance of their breakers etc

Maintenance /Repairs of air conditioners installed at various office buildings and Grid substations ( Including cost of material if required complete job)

Auxillary Transformers:- Checking of local and remote operation of accessories, Inspection and testing of transformer including drying/ replacement of silica gel,checking of buchhloz relay,surge relay,conservator oil level indicator, temp. sensors, topping of oil, cooling system, alarm / trip circuit. Measurement of IR Values, dielectric strength of transformer oil and BDV of oil, checking of marshalling box of OLTC, reactor, NGR, T.B of PDR, Bucholz relay, surge relay. External cleaning of radiators, bushings etc.

Repairs/replacement of control cards /motors of AVR's ( including cost of material if required complete job)

Replacement of old / defective High Mast Lights withnew 200 Watt LED's including cost of cabling, LED and other associated works( Complete Job/ LED)

Part (C) 132 / 33 KV Grid Stations (Breakdown Maintenance)

Circuit Breakers. Unloading of breaker at work site, its dragging and Dismantling of Damaged Circuit Breaker and errection and commisioning of new circuit breaker including control cabling , connections to the breaker, earthing of the breaker and final erection checkup etc and also carriage of damaged breaker to Divisional stores etc ( complete Job)

Circuit Breaker Dismantling of damaged breaker Pole after opening of all connections, loading of new/used breaker pole from divsional stores or site stores and unloading of new breaker pole including dragging upto the site of work and errection and commissioning of the new pole after carrying out all mandatory tests and also carriage of damaged pole to Divisional stores etc.

CT/PT/CVT/Coupling Capacitor/Wave Trap. Unloading at work site including its dragging and Dismantling of Damaged CT/PT/CVT/Coupling Capacitor/wave Trap and its errection and commisioning of new CT/PT/CVT/Coupling Capacitor/Wave Trap including control cabling , connections ,earthing and final erection checkup and also carriage of damaged equipment to Divisional stores etc.( Complete Job)

Surge Arrestor Unloading at work site including its dragging and Dismantling of Damaged Surge arrestor and its errection and commisioning of new Surge arrestor including control cabling , connections ,earthing and final erection checkup and also carriage of damaged equipment to divisional stores etc. ( Complete Job)

Isolators with earthing blade installation of new isolator after dismantling of the damaged one including unloading and dragging of the said isolator where ever required. Control cabling , adjustment and carrying out various designated tests after installation and also carriage of damaged equipment to divisional stores etc. Set of 3 PcS ( Complete Job)

Isolators without earthing blade Installation of new isolator after dismantling of the damaged one including unloading and dragging of the said isolator where ever required. Control cabling , adjustment and carrying out various designated tests after installation and also carriage of damaged equipment to divisional stores etc. Set of 3 Pcs ( Complete Job)

Part (C) 132 / 33 KV Grid Stations (Breakdown Maintenance)

Loading of circuit breakers in mechanical transport from divsional stores including manual dragging from stocking site upto loading site ( complete Job)

Loading of CT's/PT's/CVT's/Surge arrestors in mechanical transport from divsional stores including manual dragging from stocking site upto loading site ( complete Job)

Loading of control pannels in mechanical transport from divsional stores including manual dragging from stocking site upto loading site ( complete Job)

Loading of isolators in mechanical transport from divsional stores including manual dragging from stocking site upto loading site ( complete Job)

Rearrangement of material in divisional store yard as required instantly for facilitating easy movement of men and material in the yard for issuance and receipt of material which includes all types of material except breakers, CT's,PT's,Surge arrestors and isolators.

Handling (loading, unloading and Carriage including verification , counting & Sorting ) of various line and sub- station materials and equipments viz power & distribution Transformers, ligtining arrestors 132 and 33 Kv , post Insulators and other allied Materials viz Transformer Oil, insulators, etc.

Carriage and staking of various line and sub- station materials and equipments viz old MOCBs,scrap of sorts and other allied Materials viz insulators, post insulators, porcelean bushes etc.

Shifting/stacking / Reaarrangement of old tower material/ galvanised/ bend material in the divisional store yard in order to facilitate the easy movement of men and material and to keep the store materials in arranged way.

Shifting/stacking of old material (Serviceable / un serviceable) in the divisional store yard including conductor,TMT, Angle and Channels, scrapes etc. in order to facilitate the easy movement of men and material and to keep the store materials in arranged way.

Cleaning of roads ,paths and parks including snow clearance etc.

Fabrication of angle iron of various sizes/ Channel Iron etc as per design which includes cutting, Drilling of Holes, Straigtening, skew Cutting etc.

Handling, displacement, re-arrangement including loading/ unloading of Control and Relay Pannels of 132 Kv and 33 Kv side and other allied pannels like DCDB, ACDB etc.

Backfilling of towers wherever required which is caused due to soil erosion or flash floods or any other reasons including carriage of material and material cost of good soil.

Handling (loading, unloading and displacement) of various Drums like cable drums, 0.2/0.4/0.5 ACSR Conductor Drums, Earthwire drums etc for hassle free movement of men and material in the store yard.

Loading/ Unloading and Re-aarangement of Transformer Barrels

Ess Bee Electricals

M/S IRFAN AHMAD DAR

Ess Bee Electricals