Annual Maintenance and Special repairing for all Sub-stations in JNU-3rd-Call

Servicing of 400/630/800 Amp., 11 KV OCB/VCB with blower, cleaning of existing HT panel inside,outside with tighting of all bus bar, nut & bolt, CT,PT chamber, alignment, adjustment of gaps between phase to phase, greasing & lubrication all moving fixed part including replacement of minor parts such as spring, washers etc for smooth mechanical operation i/c Servicing, Calibration, testing of 3 element IDMT relay ( one earth fault & two over current) with secondary injection testing of 11 KV OCB/VCB complete with testing commissioning as required.

Removal of moisture in bus bar, insulator HT cable box and heating of P.T., C.T. Of 11 KV VCB/OCB Panel complete with High Pressure testing, Meggering of H.T. cable, Panel etc as required.

Checking & arresting of oil leakages from 200 to 1600 KVA transformer at site including dismentling of LT/HT cables/ bus bar, connections, LT/HT bushing rods, dismentling of main top cover/inspection window of transformer after draining of oil of transformer in to drums, replacement of cork rings set along with new teflon rings of all phases for arresting oil leakage, fixing of all terminals & bus bar's connection and making adjustment, replacement of cork gaskets, oil rings of inspection window side & bukholz relay side & pipe line & Silica gel if any, re-filling of oil into transformer & High pressure testing & commissioning etc as required.

Providing & fixing of HT/LT Bushing of following capacity transformers including dismentling of old defective bushing, testing & commissiong etc complete as required.

Dehydration of transformer oil with filter machine at site to achive the dielectric strength of oil upto 50 KV including testing of oil for all chemical properties etc as required.

Rewinding of 11 KV, H.T., P.T. with copper enamelled wire complete with connection, testing etc. complete as required.

Supply & fixing of 11 KV H.T. C.T. of rated 200/5 to 300/5 Amp. With wiring connection, testing with primary injection kit, High voltage testing, meggering etc complete as required.

Supply & fixing of Shunt trip coil for 11 KV HT Breaker with wiring connection, testing etc. complete as required.

Supply & fixing of Closing coil for 11 KV HT Breaker with wiring connection, testing etc. complete as required.

Supply & fixing of Power pack unit having input 220 Volt AC and output 24/110 Volt DC including making interconnection suitable for existing 11 KV H.T. system etc. complete as required.

Supply & fixing of LED type indication lamp suitable for 11KV HT & 415 Volt LT Panels with holder assembly, wiring, testing etc. complete as required.

Supply & fixing of 11 KV bus bar insulator with testing as required.

Supply & fixing of 96 mm x 96 mm Analouge Ampere meter / KV meter of suitable range on 11 KV HT Panel with wiring connection, testing as required.

Tracing of HT cable fault 11 KV XPLE armoured power cable of 300 sq. mm with help of fault locating mahine & cable route finder machineincluding opening of cable termination , excavation & removal of soil for exposing the faulty cable (upto1.5 mtr depth & 5 mtr length), meggering & High Pressure testing before & after making joints etc complete as required.

Servicing of 800 Amp to 2500 Amp LT ACB complete with blower , cleaning, alignment, adjustment of gaps between phase to phase, lubricating/greasing all moving/fixed parts including replacement of minor parts such as spring, washers, nut & bolts etc, adjustment for smooth mechanical operation, calibration of protection relays complete with testing & commissioning as required.

Supplying & fixing following spare parts of 800 Amp to 2500 Amp capacity LT ACB of English Electric/L&T/ ABB/Alstom/C&S/GE/Crompton make complete with dismentling old parts, connection, interconnection, greasing oiling, testing, commissioning etc as required.

Bottom cluster contact

Top fix contact

MIC contact

Charging Gear Assembly

Rack in Rack out Assembly

Under voltage coil

Cradle contact

Safty shutter

Supply & fixing of UDC Assembly for 800 Amp to 2500 Amp 4 Pole ACB along with dismentling and reassembling with new UDC, connection testing complete as required.

Supply & fixing of Vaccum intruter Bottel including dismenteling of burntout bottel , complete high voltage testing complete as required.

Tracing of LT cable fault for 1.1 KV grade XPLE/PVC sheathed armoured power cable of size between 120 Sq.mm to 400 sq. mm with help of fault locating mahine including opening of cable termination , excavation & removal of soil for exposing the faulty cable (upto1.5 mtr depth & 5 mtr length), meggering & High Pressure testing before & after making joints etc complete as required.

Supply & fixing digital type CT operated 0-2500 Amp Ampere Meter of size 96 mm x 96 mm. with wiring connection, testing etc complete as & when required at site.

Supply & fixing digital type 0 - 500 volt Voltmeter of size 96 mm x 96 mm. with wiring connection, testing etc complete as & when required at site.

Providing and fixing following rating and breaking capacity and pole MCCB with thermomagnetic release and terminal spreaders , connecting bus bar of suitable size in place of existing switch fuses/fuse switch unit mounted on the existing LT Panel with making necessary modification in the Bus bar, front cover, complete with making connection with suitable size Alluminium bus bar interconnection, testing, commissioning etc as required.

250 amps 35 KA,TPMCCB

400 amps 35 KA,TPMCCB

630 amps50 KA,TPMCCB

800 amps50 KA,TPMCCB

Providing the man power on emergency call to diagonose/ rectify the minor fault in HT Braker including megering testing etc as required during General shift.

Supply of 1100 volts rated aluminium conductor steel wire / strip armored XLPE power cable of following sizes as per IS-7098 part-I with ISI marked including testing at manufacturer site etc complete as required.

3.5 core 120 sq.mm Armoured Aluminium cable

3.5 core 185sq.mm Armoured Aluminium cable

3.5 core 240 sq.mm Armoured Aluminium cable

3.5 core 300 sq.mm Armoured Aluminium cable

Supply and fixing of Helozen Lamp 1000 watt with connection,testing ,commissioning etc. complete as required

Supply and fixing of transformer Breathers with silica Gel complete as required.

Supplying and making indoor cable end termination with heat shrinkable jointing kit complete with all accessories including lugs suitable for following size of 3 core, XLPE aluminium conductor cable of 11 kV grade as required.

Supplying and making straight through cable jointing with heat shrinkable jointing kit complete with all accessories including ferrules suitable for following size of 3 core, XLPE aluminium conductor cable of 11 kV grade as required.

Supplying and making end termination with brass compression gland and aluminium lugs for following size of PVC insulated and PVC sheathed / XLPE aluminium conductor cable of 1.1 kV grade as required.

3½ X 150 sq. mm (50 mm)

3½ X 185 sq. mm (57mm)

3½ X 240 sq. mm (62mm)

3½ X 300 sq. mm (70 mm)

Supplying and making straight through joint with heat shrinkable kit including ferrules and other jointing materials for following size of PVC insulated and PVC sheathed / XLPE aluminium conductor cable of 1.1 kV grade as required.

3½ X 150 sq. mm

3½ X 185 sq. mm

3½ X 240 sq. mm

3½ X 300 sq. mm

Supplying and laying of following size DWC HDPE pipe ISI marked along with all accessories like socket, bend, couplers etc. conforming to IS 14930, Part II complete with fitting and cutting, jointing etc.direct in ground (75 cm below ground level) including excavation and refilling the trench but excluding sand cushioning and protective covering etc., complete as required.

90 mm dia (OD-90 mm & ID-76 mm nominal)

120 mm dia (OD-120 mm & ID-103 mm nominal)

Excavation of the cable trenches in hard rock not exceeding 1.5 meter in width, and lift upto 1.5 meter, including getting out the excavated soil and disposal of excavated soil as directed within a lead of 50 meter.

Laying of one number PVC insulated and PVC sheathed / XLPE power cable of 1.1 KV grade of following size direct in ground including xcavation, sand cushioning, protective covering and refilling the trench etc as required.

Above 95 sq. mm and upto 185 sq. mm

Above 185 sq. mm and upto 400 sq. mm

Laying of one number PVC insulated and PVC sheathed / XLPE power cable of 1.1 KV grade of following size in the existing RCC/ HUME/ METAL pipe as required.

Above 95 sq. mm and upto 185 sq. mm

Above 185 sq. mm and upto 400 sq. mm

Providing and fixing following rating and breaking capacity and pole MCCB with thermomagnetic release and terminal spreaders in existing cubicle panel board including drilling holes in cubicle panel, making connections, etc. as required.

125 A, 16 KA,TPMCCB