TLMD-V/J/03 of 2020-21

Auto-Transformers/Power Transformers /Auxillary Transformers:- A) Checking of Auto starting of fans, External cleaning of radiators,oil pumps OFAF/ONAF,Cleaning and checking of marshalling boxes of transformer/reactor and OLTC, (ii) Tightening of terminations, Checking of OLTC driving mechanism, Electrical checking/ testing of pressure relief device, Buchholz relay, OLTC surge relay/ checking of alarm/ trip and checking/ replacement of the gaskets of the terminal box, Checking / Tightning of earthing connections, Checking of earth resistance of Neutral, Replacement of Silca Gel of breathers and oil topping of transformers and tightning of bushing clamps on HV/IV/LV sides of 4X66.67mva, 4X40 mva, auto transformers and 20MVA to 50MVA power transformers including tandelta testing of bushing/ winding & DGA/ BDV/PPM testing of transformer oil.other tests on the transformer like ratio test, IR value/ Magnetic balance/ short circuit test etc. Checking of space heater and illumination

66.67 MVA 1 Ø, 220/132 KV

40MVA 1 Ø, 220/132 KV

50 MVA 132/66 KV

20 MVA 132/66 KV

50 MVA 132/66 KV

50MVA, 132/33KV

20 MVA 132/33 KV

1000 KVA, 66/11 KV

500 KVA, 66/11 KV

250KVA,33/0.440KV

250KVA,11/0.440KV

Draning/ De-sludging of transformer oil of transformers

Filling of oil, filitration and dehydration of transformer including installation of vacume pump to be provided by the Department.

Reparing of cooloing fans of transformers including replacement of damaged winding, bearing,MCBs,Contactors, wiring of control circuitsetc.

Lifting of top lid of power transformer for complete physical inspection & replacement of gaskets.

Replacement of damaged core bolts/Earthning strip etc.

Testing of Transformer:-

Testing of Transformer:- tandelta testing of bushing/ winding & BDV testing of transformer oil.other tests on the transformer like ratio test, IR value/ Magnetic balance/ short circuit test etc, kits for testing shall be provided by the department.

DGA and PPM of Transformer from accredted laboratories.

Replacement of damaged/outlived bushing having high tan delta including crane/ mechanical equipment if required.

220 KV Bushing

132 KV Bushing

66 KV Bushing

33 KV Bushing

11 KV Bushing

Overhauling of Circuit Breaker :- VCB/MOCB/SF6/ACB Checking of oil/gas 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, checking of air compressor, Cleaning of breaker units, checking of protection equipments and replacement of defective ones, i.e., complete inspection and testing of SF6/VCB/MOCB/ACB type circuit breakers inclusive of operating mechanism.Checking of driving mechanism, trip/closing circuits/ checking and repairing of spring charge motor and checking of tripping and closing coils.checking of equipment earthing and strucure earthing. Maintaning gas levels, venting of circuit breakers, replacement of o-rings , gas kits including circuit breaker anylysis by Circuit breaker analyser.Checking of space heater and illumination.Required as per schedule of maintenance

220KV SF6 Breaker

132KV SF6 Breaker

66 KV MOCB/SF6

33 KV VCB Spring Charging/Air pressure motors in circuit breakers.(repair and replacement)

Replacement of damaged pole of the circuit Breaker including carriage of the Equipment from divisional store to the site of work and back carriage of the damaged equiupment to the divisional store.

220KV SF6 Breaker

132KV SF6 Breaker

66 KV MOCB/SF6

33 KV VCB

CVT's /CT's /PT's :- Visual checking of earthing HFpoint (in case it is not being used for PLCC,Checking of any breakage or cracks in porclean insulator, Cleaning of CVT capacitor stacks and tightness of terminal connections,Checking and tightness of all connections including earth connections.Checking of healthiness of gaskets, Checking of neutral earthing in CVT, healthiness of all gaskets and oil level and its topping.Measurement of IR value and tightening of all connections and droppers.Primary injection test of CT/PT, Tan delta,knee point value, burden etc.

Replacement of damaged CT/PT including carriage of the Equipment from divisional store to the site of work and back carriage of the damaged equiupment to the divisional store.

Surge Arrestors :- 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.

Replacement of damaged Surge Arrestor including carriage of the Equipment from divisional store to the site of work and back carriage of the damaged equiupment to the divisional store.

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

Replacement of damaged Isolators including carriage of the Equipment from divisional store to the site of work and back carriage of the damaged equiupment to the divisional store.

Reparing of Three phase motors of isolators including replacement of damaged winding and bearing.

Droppers/Jumpers Replacement of damaged / burnt droppers or jumpers of isolators/ breakers/transformers /CT/PT /LA etc. 220/132/66/33 KV Yard.

Clamps: Replacement of damaged/burnt PG/ PAD/T/CT/Bushing clamp etc

Post Insulators :- Checking of insulators for cracks and cleaning of insulators and its replacemnt.

Illumination System :- Checking of healthiness of fittings in station buildings, outdoor switch yard, Tightening of terminals, etc.

Replacement of 200 watt LED in the outdoor switch yard

Replacement of LED/CFL along with fitting in the control room/ division building/office complex

Battery Bank: Checking and cleaning of battery cell terminals, application of patrolum gelly, if required, conduction of battery impendence test and discharge test checking voltage temperature, current, sp. Gravity of individual cells as well as terminals voltage, battery dischrge testing etc.Checking of positive/Negative earth fault of dc.Terminal tightening.

Battery Charger :- Checking of control cards, measurement of test point voltage values, testing of DC earthfault and U/V relays, IR measurement of charger transformer, checking of earthing etc. Checking of charger panel / DCDB for electrical connections, cleanliness etc.

Protection System :- Checking of relays and application of CCl4 for cleaning, replacement of worn out / defunct relays, checking and replacement of control wiring, if required, primery & secondery injection testing,software settings etc.

Cleaning of cable trenches/ ducts including of dressing of cables, trays, racks , repair of damaged duct covers etc

sub main

Gantry Columns and Beams :- Tightening of all nuts / bolts and providing of missing nuts / bolts and replacement of damaged members.

L.T. Transformer :- Testing of oil BDV, IR measurement, Testing /checking of OTI,WTI and Buchholz (if provided, Checking of healthiness of Pressure relief diaphragm, Checking healthiness of Buchholz relay, Checking tightness of earthing connections

L.T Pannel: Cleaning of panels,bus bar insulators etc. Relays Testing, Tightning of all electrical connections,Checking of indicating meters ,Check for change-over facility, if provided,Check operation /indications in OFF Load condition of MCCB,

Earthing Mat :- Measurment of earth resistivity, checking of electrical continuity of equipment earthings, tightening of earthing connectors, removal of rust from bolted earth connectors and tightening and additional earthing wherever required. 220/132/66/33 kV

DC Distribution Board :- Checking of connections, wiring, replacement of wiring if needed and checking of healthiness of all D/C and dc circuits of 33/66/132/220 Kv yards

AC Distribution Board :- Checking of connections, wiring, replacement of wiring if needed,fuses,MCB,bus bar CT, relays,MFM,LT switchs etc and checking of healthiness of all connections and AC circuits of 33/66/132/220 kv yards.

Control cables:- Replacement of damaged/outlived/burnt control cables of different cores including proper ferruling, thimbling and tagging and finally with all appropriate connections including lifting of duct covers and placing them back.

below 10 core

above 10 core

Marshelling koisk:- checking of all Terminal blocks, space heaters, light illumination, checking of all connnections and its cleaning. Fixing of cable glands earthing and checking of all other electrical accessories .

Capacitor Banks :- Checking/ tightening of capacitor cells terminals, reactor and checking its wiring connection and its control circuit.etc

BUS BAR :- Replacement of damaged ACSR Conductor along with its fittings.

220 kv yard

132 kv yard

66 kv yard

33 kv yard

Automatic voltage regulator:- checking and tightening of connections, auto control unit, oil and its overhaulling

Diesel Generator set: Maintenance and checking of its operation.

Deweeding of switch yard

Painting of outdoor equipments (Transformers, MK's, CT/PT/CVT, Protection wall, Circuit breaker, isolatores, poles etc.

AC Units: Checking and Servicing of Installed AC unit inside control room (1- 3 Ton) /office building/division building/residential quarters etc

White-Washing of Control Room/Residencial Quarters at Grid Stations, Guest house and Divisional Office building

Upkeep of Sanitary installed in the control room/ office building/division building/residential quaters/Toilets and replacement of any damaged item if required.

Upkeep of electrical accessories installed in the control room/ office building/division building/residential quarters and replacement of any damaged item if required.

Providing of skilled/ semi skilled/ un skilled labour for the works which are not coverd from s.no. 1 to 29

skilled labour

semi- skilled

un skilled

Store handling:

Unloading / Loading of C&R Panels and other equipments in divisional store Gladni Including manual Carriage within store yard).

Unloading / Loading of ,angle iron, Tor steel , tower material, etc. in divisional store Gladni Including manual Carriage within store yard).

Unloading / Loading of CT/CVT/PT/CB etc in divisional store Gladni Including manual Carriage within store yard).

M/S SURYA ENTERPRISES

U3 ENTERPRISES

PARIHAR ENGINEERS AND CONSULTANTS

MAHESH CHANDER SHARMA CONTRACTOR

JASMEET SINGH

Manohar Singh Sasan

raj pal sharma

VIKRAM JEET SHARMA

M/s GCS Associates

U3 ENTERPRISES

raj pal sharma

Manohar Singh Sasan

M/S SURYA ENTERPRISES