Fault attending, Repair n Mntce of OD type transformer substations,11KV OH lines with associated works at various Telephone Exchanges and Mobile BTS sites under BhubaneswarBA. Site- Patia, KPgarh, Keranga, Pipili, Khelar, Baku, Nuagada, Astaranga

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. (Staff deployed for the work should be deployed with required safety gear as prescribed by DISCOM authority, 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 170 KMs

For sites distance above 170 KM and up to and including 180 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 termonations 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.

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

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 damaged breather for 25 KVA/63KVA 11KV/0.417KV transformer by a new one with dry silica gel etc. as required.

Supply & drawing of 55 sqmm. AAA conductor for overhead line and DP structures i/c binding with insulators etc. complete as required.

Supply & drawing of 50 sqmm. Insulated conductor for overhead line and DP structures i/c binding with insulators etc. complete as required.

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.

Replacement of the defective parts/components by new ones of following sizes & ratings aluminium/copper sockets/lugs for PVC sheathed / XLPE aluminium/copper conductor cable of 1.1 KV grade i/c fixing/crimping etc. as required.

50 sqmm Al socket.

70 sqmm Al socket.

On site Repairing of 25KVA Aluminium/copper wounded transformer at existing position, Checking IR & continuity ,dismantling the faulty transformer, removal of top cover, HT/LT bushings Physical checking & rectification faulty / damaged connections between winding to outside bushing points making new connection , replacement of HT/LT bushings, brass stud terminals if any required ( To be paid extra as per actual) re-insulating exposed wires , reassembling i/c replacement of gaskets, nuts & bolts, washers, etc. complete as required. (Rewinding of Transformer is not in the scope of this item)

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/0.417KV, 50 Hz Aluminium/ Copper wound oil cooled Transformer

Repairing of 25KVA Aluminium/copper wounded transformer at factory/workshop, Checking IR & continuity, by dismantling the faulty transformer, Physical checking & rectification faulty / damaged connections between winding to outside bushing points making new connection , replacement of HT/LT bushings, brass stud terminals if any required ( To be paid extra as per actual) re-insulating exposed wires , reassembling i/c replacement of gaskets, nuts & bolts, washers, carry out factory tests etc. complete as required. (Rewinding of Transformer is not in the scope of this item)

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/Copper 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/0.417KV, 50 Hz Copper 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.

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

Brass stud with nut for HV Bushings ( 11KV side)

Brass stud with nut for LV Bushings (LV side)

HV Bushings ( 11KV side), Porcelain make

LV Bushings (LV side) Porcelain make

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

Making arrangements for inspection and testing of the re-winded transformer by the designated inspector of supply company at factory / workshop and obtaining test certificates and clearance for re-installation and energisation of the said transformer etc. complete as required.

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 considered from BSNL office/ TB BBSR/ Transformer repair workshop to site & will be on shortest route only).

Distance above 100 KM and up to and including 180 KMs

Distance above 50 KM and up to and including 100 KMs

Cutting of brances of tree touching the 11KV line & substation with help of expertize person with required tools & plant with utmost care for not damaging the electrical installations , removing from the substation area complete as required.

At BTS Patia ( USO site) ( OH line route & substation yard), At Baku( removal of Date tree from SS yard)

At TE Pipili (substation yard), Nuagada Astaranga

Transportation of spare/recovered /standby 25 KVA transformer from BSNL office to transformer factory for check & rectification, bringing back to BSNL office /TB BBSR or the space marked as desired by the engineer in charge for storage by using suitable transportation medium including loading and unloading at both ends etc.

25 KVA transformer from BSNL office to workshop- 2nos

25 KVA transformer from Workshop to BSNL Office/ TB BBSR- 2nos