Immediate fault attending, repair and maintenance of outdoor type transformer substations and rewinding of 25KVA 11KV/0.415KV Aluminium wound Transformers at TE/BTS at KORABORA, BALARAM PRASAD, KHAMARASAHI AND OTHER SITES under Bhubaneswar BA

Amount

Attending to break down calls, physical inspection of Substation accessories, overhead lines, feeder panels, meter box etc. to find out the faults and taking corrective measures for restoration of power supply i/c rectification of minor faults such as replacement of pin/post insulators, jumper wires, LT side cable , LT side switch gears etc. if required any. (Materials are not in the scope of this item)

For sites distance up to and including 50 KMs

For sites distance above 50 KM and up to and including 100 KMs

For sites distance above 100 KM and up to and including 150 KMs

Liaison with different units of the supply authority i.e. Division/Sub Division/Section offices/MRT office/E & MR office and field staff etc. for obtaining shut down of 11KV line, breaking of meter seal if required to carry out the repairing and maintenance works of the Sub Station and re-energisation, testing etc. as required.

To carry out minor repairing works such as pin/post insulators, jumper wires, LT side cable , LT side switch gears etc.

To carry out major repairing works such as rewinding/ replacement/ repairing & overhauling of Transformer, AB switch, DO fuse unit, replacement of HT cable and its end terminations or any other major repairing works of the DP structure & associated overhead lines.

Thorough servicing of AB Switch, adjustment of bearings, male/female contacts, lubricating of moving items i/c replacement of minor defective parts like nuts, bolts, clamps, wire braided copper strips and checking the functional operation, etc. as required.

Replacement of the following defective spare parts of the transformer substation by new one i/c fitting, connection etc. as reqd.

Male contact and Female contacts made of hard drawn copper for 200 Amps air break switch with wire braided strip etc. comprising of 3nos per set.

11KV Post Insulator for 200Amps AB switch/ HG fuse unit

Operating Handle made of 25/32mm Medium class GI pipe with wire braided copper strip

Rewiring of the DP structure of Transformer Sub Station with 55sqmm AAA /50sqmm insulated Al.conductor stranded cable with al. Lugs/sockets, binding with post insulators etc. complete as required.

Dismantling the following ratings faulty transformer from the existing D.P. structure/Plinth & installation of standby/repaired transformer i/c testing and commissioning, recording the required parameters etc. by qualified staff, arranging required tools & plant with proper precautionary measures etc. as required.

25 KVA, 11KV/0.415KV, 50 Hz Aluminium wound oil cooled Transformer

Rewinding of the HT windings of the following ratings Oil immersed Distribution class Transformer with superior grade and suitable size Double paper covered Transformer winding conductor , providing re-insulation of LT winding etc. including dismantling the transformer parts i.e. conservator tank, terminal boxes, bushings, removing the core and windings from the tank, draining of transformer oil, cleaning of tank, reassembling the core & windings and all the aforesaid parts after rewinding/repairing, replacement of gaskets, worn out nuts, bolts and washers/cork washers etc, heating in heat chamber, carry out factory tests and submission of test reports etc. complete as required. (The dismantled aluminium winding and other materials can be retained by the agency and credit for the same to be given in the quoted rate of this item)

25 KVA, 11KV/0.415KV, 50 Hz Aluminium wound oil cooled Transformer

Supplying and pouring of transformer oil (IS:325) of suitable make & grade for topping up/replacement of old deteriorated oil etc. complete as required.

Filtration and de-hydration of existing Transformer oil at factory / work shop ( In case of rewinding/repairing of Transformer at factory / workshop), testing of BDV and submission of oil testing report etc. as required.

Painting of the transformer body with primer & two coats of weather proof synthetic enamel paints after scrapping the rust etc complete as reqd.

Transportation of spare/new/repaired/standby 25/63 KVA transformer from BSNL office /factory /workshop to respective sites and faulty Transformer from sites to back by using suitable transportation medium including loading and unloading at both ends etc. complete as required. (The rate should be inclusive of toll gate fee/charges wherever applicable, nothing extra will be paid. Distance will be on shortest route only).

Distance above 50 KM and up to and including 100 KMs (Up and Down)

Distance above 100 KM and up to and including 150 KMs (Up and Down)

Distance above 150 KM and up to and including 200 KMs (Up and Down)

Replacement of faulty/damaged pin insulators by new one of 11 KV grade pin type insulator with large steel head G.I. pin, nuts, washers on existing HT pole/ DP structure etc. complete as required.

Replacement of faulty/damaged disc insulators by new one of 11 KV, 45 KN porcelain disc insulator with galvanized insulator fittings, ball and socket type and complete with galvanized strain clamps, bolts, nuts, washers etc. as required.

Replacement of faulty Lightening arrestors by new ones of nonlinear resistor type lightning arrestor suitable for 3 wire, 11 KV overhead lines with rated voltage 9 KV (rms) with a nominal discharge current rating of 5 KA and complete with galvanized clamping arrangement, G.I. bolts, nuts, washers etc. as required, comprising of 3nos per set.

M/S PRACHI ELECTRICALS