MAINTENANCE AND SERVICING OF 132 11 KV TRANSFORMERS CONTROL RELAY PANELS CABLES EARTHINGS AND ALLIED WORKS AT MRS AT NAVAL DOCKYARD VISAKHAPATNAM UNDER GE (I) DM VISAKHAPATNAM

M&L for following Transformer oil evaluation as per IS: 1866-2017 from Laboratory having accredited by NABL (Govt. of India) (i) Dissolved Gas Analysis (DGA) as per IS: 9434-2019, IS: 10593-2018 & IEC 60567, (ii) Acidity, (iii) Water content, (iv) Sludge, (v) Die electric dissipation factor, (vi) Specific registance, (vii) Flush point, (viii) Density (ix) Apearence, (x) Electric strength, (xi) Interfacial Tension of transformer oil of 132/11 KV transformer by taking out at 5.0 ltr SS Container and transporting to govt approved lab at Visakhapatnam or at near by Cities including submission of test report.

M & L for filtration/dehydration transformer oil of transformer voltage grade 132/11 KV, capacity 20/25 & 10/16 MVA outdoor type, floor mounted in situ till achieve dielectric strength minimum 60 KV at 4mm gap all as specified and directed.

M & L for topping up/replacement of transformer oil with new transformer oil suitable for working voltage 132/11 KV grade in main tank and OLTC including necessary dehydration to achieve dielectric strength min 60 KV at 4mm gap complete all as specified and directed.

M & L for replacement of silica gel grains in the breather assembly of transformer complete all as specified and directed.

M & L for replacement of breather assembly made with polycarbonate base and clear acylic glass of size to accommodate 2.0 kg of silica gel for transformer complete all as specified and directed.

M&L for maintenance/servicing of 132/11 KV transformer OLTC control panel board after dismantling taking out all doors, covers from front and rear. Servicing comprising of thorough cleaning of complete inside cabinet with forced air and suitable cleaning agent, removing all dust/dirt, cleaning of all insulators, busbars, switchgears, all cable terminals with CTC and clean dry cloth, cleaning of outside surface with CTC and dry cloth, tightening of all nuts, bolts & washers. Repair comprising of replacement of burnt aluminium cable lugs, burnt switchgear, non-functional panel meters, non-functional indicator lamps, damaged panel metering wirings, nonfunctional selector switches, unsv CTs, unsv bakelite fuse with fuse base, damaged panel door/cover knobs & door locks, damaged door hinges, damaged cable insulation with coloured heat shrink insulating sleeves and required nuts, bolts & washers. Overhauling comprising of dismantling cable ends from panel board and cable duct, replace with new one, providing proper aluminium cable lugs and refixing to original position with required nuts, bolts & washers complete all as specified and directed.

Periodical cleaning of complete transformer outer surface including 132 KV bushings, radiators, marshaling tank with volatile cleaning agent at every alternate 3 month to keep the complete outside surface dry and clean all as specified and directed. Note :- 2 times cleaning i.e. quarterly basis measured as one each job.

M&L for painting of old painted yard steel structure/MS laddder surface of tower lights with one coat of red oxide and two coats of synthetic enamel paint complete all as specified and as directed

Material & labour for cleaning of 132 outdoor kit feeder 1 , Feeder 2, TR 2 & TR3 HV side complete removing all dirt and dust accumulated inside fins with suitable cleaning agent cleaning of complete mounting MS structure and painting the supporting structure with one coat of aluminium paint opening and reconnection of all earth terminals after cleaning jointing surfces complete all as specified and as directed.

M&L required for servicing & maint of 132KV, horizontal double break isolators "GRPS" make, 132 KV, triple pole, 31.5 KA centre post rotating horizontal double break type isolators suitable for upright mounting with manual operated mechanism for main switch and earth switch (i.e. mechanically gang operated) with all accessories required for normal operation of the isolator, but without support insulators, without supporting structure and without terminal connectors with following configuration (copper design) : - a) For 800 Amps with one earth switch. b) Support insulators for the above isolators. One stack consisting of 325 KV having a creepage distance of 4495 mm and cantilever strength of 6 KN as manufactured & tested (31mm/KV) (Per No.). c) Terminal connectors for the above isolators a set of 06 Nos. Rigid type bimetallic terminal connectors suitable for single ASR Zebra conductor.