Annual maintenance Contract of O6 No. 66 by 11 KV Stations, 93 KM 66 KV transmission line and loading-unloading of materials at Store and other allied works for the Year 2023-24 and 2024-25 for Sub Transmission Division Kargil

Maintenance/ Testing / Replacement of 11KV Switchgear

Dismantling, cleaning, greasing and assembling of hand pullout system, racking mechanism of chassis and position indicators. Alignment of breaker in panel for smooth racking-in/ racking-out operation shall be done and adjustments shall be done if required.

Cleaning of 11KV panels by way of vacuum cleaner/air blower & Cleaning and tightness checking of CTs, PTS and control wiring connections in terminal blocks.

Replacement of faulty relay of 11KV Board after carrying out control ckt. checking.

Cleaning of contacts, checking of vacuum interrupter, tripping coils, closing coils and replacement if required & checking of mechanical tripping mechanism and adjustment if required.

Maintenance of SF6 Breakers

Inspection and checking of SF6 leakages, refilling of SF6 gas, checking of SF6 density monitor and pressure setting replacement if required. Checking of close/trip mechanism from remote, local and manual operation and associated indicators. Checking of protection and interlock system complete job. Checking of spring charging mechanism and and associated indicators.

Checking of door ceiling gaskets and replacement if any, Checking of space heater and illumination system. Checking of tightening of all cable termination in TB and control cable dressing, tightening of cable glands and lugs and replacement if required. Checking tightness of foundation bolts

Maintenance of 66 KV CTs and PTs

Routine maintenance of CTs, PTs, oil level monitor and topping of oil if required. Measurement of CT, PT secondary resistance, ratio test, Magnetization characteristics and checking of primary connection strips. Cleaning of dusts and visual inspection of any cracks in insulators of CTs, PTs. Checking tightness of foundation and equipment bolts. Cleaning of marshalling boxes, checking of healthiness of gaskets, junction boxes, carrying out DGA and testing of other parameters of oil.

Maintenance of 66/11 KV, 6.3 MVA Power Transformer

Complete cleaning of Transformer, Marshalling Box, and Control Panel, tightening of bolts and replacement of gaskets if required. Checking oil level in bushings and topping when required. Topping of oil in conservator and OLTC if required. Checking of OLTC mechanism, pressure relief device, Buchholz relays and respective protection system

Checking of Winding Resistance / IR, PI, BDV / DGA of Oil. Checking of alarm/trip circuits, release of air from different points shall be done, if reqd. Checking the healthiness of Control Circuit Connections and various Logics, if reqd. Calibration of OTI / WTI of transformer, shall be done if reqd. Periodic replacement of breather.

Maintenance of 66KV Isolators with earth blade

Cleaning of isolator contacts, greasing of contacts, replacement of damaged contacts. Checking opening/ closing mechanism both manual and electrical, adjustment of switches, link rods and livers required if any. Checking of isolators alignment for proper fitting of contacts and adjustment required if any. Checking of earthing strips and Tightening of nuts and bolts

Maintenance of Battery Sets & Battery Chargers .

Cleaning of battery surface, joints, all inter cell connectors and tightness checking of all joints. Application of petroleum jelly / Battery Terminal Protector at all joints, if reqd. Checking the Specific Gravity, Voltage and Electrolyte Level of each cell Topping up of cells with electrolyte, wherever necessary. Checking the battery vent plugs and replacing wherever necessary. Cleaning of Battery Charger panels internally and externally. Checking of all electrical connections of charger panels for tightness and cleaning. Replacement of any defective battery cells, after proper charging, if necessary. Periodic Boost Charging of Battery Banks, as and when required.

Laying/fixing of Power and Control Cables.

Laying fixing of Power Cable of size up to 300 sq. mm on surface / in the existing masonry/ duct if required.

Laying fixing of Power Cable of size up to 185 sq. mm on surface / in the existing masonry/ duct if required.

Laying and fixing of One Control Cable of size up to 2.5 sq. mm and any no. of Cores on surface / in the existing masonry duct if required

Removal of false flooring / tray cover / conduits, etc placing them back after job

Fixing of power cable kits indoor and outdoor type up to 300 sq./185 sq. mm if required.

Replacement/repair of 11KV GO sets if required

Checking of Switch yard lightning and replacement of any defective parts complete job.

Repair/ replacement of trench cover if required

Laying and fixing of One Control Cable of size up to 2.5 sq. mm and any no. of Cores on surface / in the existing masonry duct if required

Urgent/ breakdown maintenance of switch yard equipments.

Replacements of CTs single pole by way of modification of their mounting bases if required. Carriage from divisional store to site of work and installation/ commissioning on existing structure complete job. Dismantling of the damage one and return to the store. (labor charge) • Replacement of CT Single pole

Replacement of SF6 Breaker single pole by way of modification of their mounting bases if required. Carriage from divisional store to site of work and installation/ commissioning on existing structure complete job. Dismantling of the damage one and return to the store. (labor charge)

Replacement of Surge isolater single pole pole by way of modification of their mounting bases if required. Carriage from divisional store to site of work and installation/ commissioning on existing structure complete job. Dismantling of the damage one and return to the store. (labor charge)

Repair/ replacement of earthing switch blades and its contacts including its alignment, link/ lever movement adjustment, tightening of nuts and bolts complete job. Dismantling of the damage one and return to the store. (labor charge)

Routine/urgent/ breakdown maintenance of 66KV Transmission Line.

Foundation back filling / soil removal.

Replacement of missing/damaged tower component and danger/number/phase/Circuit plate/ACD

Trimming/cutting of trees.

Replacement of damaged/ broken 11KV disc insulators in normal areas.(Single string)

Replacement of damaged/ broken 11KV disc insulators in Hilly/tough terrain areas.

Providing of mid span joints in panther conductor in case of cutting/ snapping of conductor and restringing of conductor.

Repair/ replacement of damaged jumpers of 66KV line.

Repair/replacement of dead ends by way of dismantling of conductor and restringing

Repair/providing of revetment wall if required

Patrolling of 66KV Transmission line when required

Allied items for power transformer,11KV & 66 KV Switchgear & other equipment maintenance

Installation of SF6 circuit breaker

Installation of 66 kv isolator

Installation of 66kv C&R Panel

Installation of 11 kv Vaccum circuit breaker

Installation of 66kv reactor

Installation of 11 KV GO set

Stringing of Panther Conductor

Installation of 6.3 MVA transformer

Installation of 10 MVA transformer

Fixing of Disc sets

Errection of 9 mt long pole

Replacement of defective energy meters

Relay settings,cordination and testing on 66 KV and 11 KV levels of a receiving station

Energy meter calibration at 66 KV and 11 KV level of a receiving station

Dweeding/removing of unwanted grass and other items from a receiving station

Watering of earthing pits of a receiving station

Minor repairs of bathroom,kitchen including drainage pipes and sinks at a receiving station

Emptying of septic tanks of control room toilets of a receiving station

Power and control cable dressing of a receiving station

Cleaning of control room ,switch yards,transformer by removing dirt,sand,soil accumulated due to windstorms etc…

Chemical earthing complete job

Testing of power transformer complete using CMRI kit

Replacement of faulty cts of 11KV Board after carrying out control ckt. checking.

Replacement of faulty pts of 11KV Board after carrying out control ckt. checking.

Replacement of faulty burn out MCB of 11KV Board after carrying out control ckt. checking.

Replacement of burn out fuses of 11KV Board after carrying out control ckt. checking.

Replacements of PTs single pole by way of modification of their mounting bases if required. Carriage from divisional store to site of work and installation/ commissioning on existing structure complete job. Dismantling of the damage one and return to the store. (labor charge) • Replacement of PT Single pole

Replacements of SA single pole by way of modification of their mounting bases if required. Carriage from divisional store to site of work and installation/ commissioning on existing structure complete job. Dismantling of the damage one and return to the store. (labor charge) • Replacement of SA Single pole

Replacement of damaged 66 kv tower A,B & C which include carriage of tower material from store and errection of the same including replacement of damaged conductor/insulators by fresh to be supplied by store (complete job)

Transportation of 10/6.3 MVA Transformer from site to workshop /store

welding of bolts of tower upto 2 stages to avoid stealing of nuts and bolts

Tightening of jumpers in 66 kv towers of type A,B &C to avoid flashover due to loose connections

Tightening of 11 kv jumpers

Filtration of oil /testing at divisional stores per barrel

Loading,unloading of power cables of sizes,panther conductor,earth wire

Loading,unloading of transformer of different capacities

Loading,unloading of station equipments like batteries,chargers,cts,pts,isolators,link sets,g.o sets,do.fuse sets,insulators,kits,dead end fittings,nuts and bolts,clamps etc

M/S ZARDEEP ENTERPRISES

M/S MOHD TAHIR