REPAIR MAINTENANCE/ SERVICING OF TRANSFORMERS AND CSS INCLUDING DE-HYDRATION WORK PAINTING AND CERTAIN ALLIED E/M WORKS AT KATARI BAGH NAY, GARUDA AND ALL OTHER AREAS AT NAVAL BASE KOCHI

Amount

Excavation in trenches not exceeding 1.5 metre wide and not exceeding 1.5 metre in depth and getting out in soft / loose soil for laying/removal/identifying the fault/relaying of cable etc all as specified and directed.

Returning , filling ,in including spreading, levelling, watering and well ramming in layers not exceeding 25 cm thick in soft / loose soil complete all as specified and directed.

Removing excavated soil to a distance not exceeding 50 metre and depositing where directed at a level, not exceeding 1.5 metre above the starting point complete all as specified and directed.

M&L for Riddled soil cushioning and covering of UG cables in trenches(Note : For measurement purpose only punned thickness shall be measured and paid )

Supplying and laying un-reinforced precast concrete cable cover, class HV, type 1, flat size 300 mm x 180 mm x 40 mm. laid in trenches for protection of cable all as specified ,.

Supplying and laying un-reinforced precast concrete cable cover, class LV, type 1, flat size 250 mm x 150 mm x 40 mm. laid in trenches for protection of cable all as specified.

M & L for 100 mm bore High density polyethylene pipes (HDPE) PN 10 laid in trenches/Wall/road crossing for suitable length as per sire requirement all as specified.

M & L for 150 mm bore High density polyethylene pipes (HDPE) PN 10 laid in trenches/Wall/road crossing for suitable length as per sire requirement all as specified.

M & L for 40 mm bore MS tubes light grade galvanised, with all fittings laid in trenches or walls or for passing earth strip, etc , complete including taking down old item.all as specified

M & L for 80 mm bore MS tubes light grade galvanised, with all fittings laid in trenches or walls or for passing earth strip, etc , complete including taking down old item.all as specified

Cutting into existing bituminous carpet road/PCC hard standing/tiles for laying of pipes/UG cables, re filling, ramming and making good the disturbed surfaces with cold mix Bitumen/PCC Hard standing/Tiles to match with the existing complete all as directed.

Materials and labour for earthing complete with galvanised iron earth plate electrode 600 mm x 600 mm x 6 mm thick, burried directly and preferably vertically in ground, earth pit not less than 2.25 Mtr deep below ground level with top edge of the plate not less than 1.5 m below ground level connetced with galvanised strip of size 32 x 6 mm by means of nuts, bolts, check nuts and washers made of galvanised iron or steel earthing lead to be protected by galvanised iron pipe 40 mm bore (medium grade) and other end connected to earthing test point or lightening arrestor or main controlling switch as directed including providing funnel with 20mm bore galvanised iron pipe (light grade), wire mesh, charcoal or coke and common salt in alternate layer of 15cm (compacted thickness) all round the earth electrode, concrete earth pit in PCC (1:3:6) type C-1 (with 20mm graded aggregate), 50mm thick precast RCC (1:2:4) cover slab (re-inforced with 8mm dia TMT bar @ 15 cm C/C bothways and suitable handle made of 10mm dia) including necessary earth work in excavation, returning filling and removal of surplus earth upto a distance not exceeding 50 m etc all as shown on electrical plate No. 3 of MES Schedule Part-I(2009) complete including testing on completion all as specified including taking down of old item and as directed by the Engr-in-Charge. NOTE :- (i) Cost of GI pipe medium grade 40 mm shall deemed to be included in the quoted rate (ii) GI strip and GI pipe length of upto 7.5 RM shall deemed to be included in the quoted rate and over and above shall be measured and paid separately

Material and labour for earth continuity conductor or main earthing strip fixed to wall on batten or porcelain insulators or recess or chases or buried in ground or drawn in GI pipe 40 mm or fixed with poles or any other indicated sitution for loop earthing etc as required using galvanised iron strip of size 32 X 6 mm complete all as directed. NOTE :- (i) GI Pipe 40 mm shall be measured and paid separately

Material and labour for meggering of all the earth resistances of earthings of HT VCB/RMU Panels, Transformers and other control panels inside the MES Substations including marking of the measured resistance with black paint on the earth pit at the substation all as specified and as directed. The test reports of all the earth resistances, Earth to neutral voltages measured shall be submitted duly signed by JE E/M & Engineer-in-charge. Note:- Earth tester and all other essential accessories shall be arranged by the contractor without any extra cost.

Material and labour for welding of broken or damaged earth strip including placing new porcelain insulator after welding all as directed.

Material and labour for removing/taking down/cutting/drilling old unserviceable broken/damaged earth strips from the substation all as directed.

Material and labour for removing/taking down/cutting/drilling old unserviceable broken/damaged HT/LT UG cables from the substation all as directed.

Supply and fixing , cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for XLPE armoured aluminium conductor cable of size 120 sqmm to 185 sqmmx 3 core including taking down old item, all as specified. Make : 3M M-seal / Raychem / Denson.

Supply and fixing , cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for XLPE armoured aluminium conductor cable of size 120 sqmm to 185 sqmmx 3 core including taking down old item, all as specified. Make : 3M M-seal / Raychem / Denson

Supply and fixing of cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for XLPE armoured aluminium conductor cable of size 240 sqmm to 300 sqmm x 3 core including taking down old item, all as specified. Make : 3M M-seal / Raychem / Denson

Supply and fixing , cable straight through jointing kit for 11 KV (Earthed) grade cable, heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 sqmm to 185 sqmm including taking down old item ,all as specified. Make : 3M M-seal / Raychem / Denson

Supply and fixing , cable straight through jointing kit for 11 KV (Earthed) grade cable, heat shrink type joint complete with jointing material and accessories suitable for XLPE armoured aluminium conductor cable of size 240 sqmm to 400 sqmm x 3 core including taking down old item ,all as specified. Make : 3M M-seal / Raychem / Denson

Supply and laying in trenches, or fixing on walls or passing through cable duct / pipe XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured electric power cables (heavyduty) with aluminium conductor, 11000 volts, grade having cross sectional area 3 core 185 sqmm including taking down old item, all as specified.

Supply and laying in trenches, or fixing on walls or passing through cable duct / pipe XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured electric power cables (heavyduty) with aluminium conductor, 11000 volts, grade having cross sectional area 3 core 240 sqmm including taking down old item, all as specified.

Supply and laying in trenches, or fixing on walls or passing through cable duct / pipe XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured electric power cables (heavyduty) with aluminium conductor, 11000 volts, grade having cross sectional area 3 core 300 sqmm including taking down old item, all as specified.

Supply and laying in trenches, or fixing on walls or passing through cable duct / pipe XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured electric power cables (heavyduty) with aluminium conductor, 1100 volts, grade having cross sectional area 3.5 core 300 sqmm including necessary thimble, gland, etc and taking down old item, all as specified.

Supply and laying in trenches, or fixing on walls or passing through cable duct / pipe XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured electric power cables (heavyduty) with aluminium conductor, 1100 volts, grade having cross sectional area 3.5 core 240 sqmm including necessary thimble, gland, etc and taking down old item, all as specified.

Supply and laying in trenches, or fixing on walls or passing through cable duct / pipe XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured electric power cables (heavyduty) with aluminium conductor, 1100 volts, grade having cross sectional area 3.5 core 400 sqmm including necessary thimble, gland, etc and taking down old item, all as specified.

Supply and laying in trenches, or fixing on walls or passing through cable duct / pipe XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured electric power cables (heavyduty) with aluminium conductor, 1100 volts, grade having cross sectional area 3.5 core 400 sqmm including necessary thimble, gland, etc and taking down old item, all as specified.

Supply and laying in trenches, or fixing on walls or passing through cable duct / pipe XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured electric power cables (heavyduty) with aluminium conductor, 1100 volts, grade having cross sectional area 3.5 core 120 sqmm including necessary thimble, gland, etc and taking down old item, all as specified.

Supply and fixing , cable straight through jointing kit for 1.1 KV (Earthed) grade cable, heat shrink type joint complete with jointing material and accessories suitable for 3.5 core XLPE armoured aluminium conductor cable of size 240 to 300 sqmm including taking down old item ,all as specified. Make : 3M M-seal / Raychem / Denson

Supply and fixing , cable straight through jointing kit for 1.1 KV (Earthed) grade cable, heat shrink type joint complete with jointing material and accessories suitable for 3.5 core XLPE armoured aluminium conductor cable of size 150 sqmm to 185 sqmm including taking down old item ,all as specified. Make : 3M M-seal / Raychem / Denson

Supply and fixing , cable straight through jointing kit for 1.1 KV (Earthed) grade cable, heat shrink type joint complete with jointing material and accessories suitable for 3.5 core XLPE armoured aluminium conductor cable of size 70 sqmm to 120 sqmm including taking down old item ,all as specified. Make : 3M M-seal / Raychem / Denson

Servicing of transformer Oil filled type,11000 Volt / 433 Volts or 11000/380Volts step down/Step up, indoor/out door,type of capacity upto 250 KVA comprising following work services :- (a) Disconnection of cable termination of HT & LT ends. (b) Opening of top cover by removing nuts, bolts and all mounting accessories and conservator tanks for visual inspection. (c) checking of HT/LT insulators including internal inspection (d) Replacement of corroded nuts/bolts with double washers, burned lugs, etc by new one (e) Servicing of tap changing gears by cleaning and polishing tapping contact points.(f) Removing, cleaning, polishing of bushings and studs of both HT/LT side by using soft cotton cloth including checking for cracking and refixing the same. (g) Refixing all cable terminals HV & LV sides and transformer top cover, conservator tank and other fitments in position. (h) Cleaning and heating/replacing of silica gel in breather. (j) Mechanical inspection and fixing of buchholz relay. (k) Connecting HT & LT side with existing incoming and outgoing cables including re-connection of earth strip/lead. (l) HT side cable connection shall be made with new HT tape & M Seal Monoplast as required at site. (m) All marshalling boxes to be cleaned. (n) All the terminal connection of control and relay wiring to be checked and tighten. (o) Examine the rollers carefully includes greasing them properly. (p) Measurement of winding resistances on both HV and LV sides (q) performing the Magnetic balance test (r) The servicing report of the transformer should be provided mentioning all the recommendations, determining the serviceability of transformer, assesing the further life of the transformer all as directed by the Engineer-in-charge.

All as per item No.34 here in above but of capacity 315 KVA to 500 KVA complete all as specified and directed.

All as per item No.34 here in above but of capacity 630 KVA to 1000 KVA complete all as specified and directed.

All as per item No.34 here in above but of capacity 1250 KVA to 1600 KVA complete all as specified and directed. Note for Item No.34 to 37 : (i) New buchholz relay, New silica gel, New bushes, studs, etc required for replacement shall be measured and paid for separately as 'Supply only' and cost of taking down of all these materials shall deemed to be included in the above quoted rate. (ii) The cost of replacement of unserviceable nut, bolt with double washers, HT / LT tape used, M-Seal, Monoplast, cable end socket, etc shall deemed to be included in the quoted rate. (iii) For the inspection of internal defect of transformer, the contractor shall provide proper lifting arrangements like tripod, chain and pully, T&P, etc and the rent shall deemed to be included in the quoted rate. (iv) Contractor shall isolate the transformer from the supply and do earth the transformer properly while servicing the transformer.(v) The contractor should inspect all transformer inside kataribagh and enitre Naval Base kochi bi-weekly and to report the defects/repair works noticed to the concerned JE/Engr-in-Charge and rectify the same all as directed by Eng-in Charge. (vi) Any incident of flash over/fire hazards occur at any tranformer due to not carrying out periodical inspection mentioned in Note 05/preventive, maintenance, the contractor is liable to rectify the transformer without any extra cost.

Material and labour for replacement of old corroded nuts and bolts with double washers for transformers up to 1600 KVA all as specified and as directed.

Supply and fixing HT Tape all as specified and as directed.

Servicing of transformer dry type,11000 Volt / 433 Volts or 11000/380Volts step down/Step up, indoor/out door,type of capacity upto 250 KVA comprising following work services :- (a) Disconnection of cable termination of HT & LT ends. (b) Visula inspection of the transformer and cleaning dust and debris from cover louvers, screens, internal coil cooling ducts, doors, removing dust and debris from transformer core and windings using blower all as directed. (c) checking of HT/LT insulators including internal inspection (d) Replacement of corroded nuts/bolts with double washers, burned lugs, etc by new one and tightening of all accessible hardware inclusing bushings, bolts and other connections. (e) Servicing of tap changing gears by cleaning and polishing tapping contact points.(f) Removing, cleaning, polishing of bushings and studs of both HT/LT side by using soft cotton cloth including checking for cracking and refixing the same. (g) Refixing all cable terminals HV & LV sides and transformer top cover, other fitments in position. (k) Connecting HT & LT side with existing incoming and outgoing cables including re-connection of earth strip/lead. (l) HT side cable connection shall be made with new HT tape & M Seal Monoplast as required at site. (m) All marshalling boxes to be cleaned. (n) All the terminal connection of control and relay wiring to be checked and tighten. (o) Examine the rollers carefully includes greasing them properly. (p) Measurement of winding resistances on both HV and LV sides (q) performing the Magnetic balance test (r) The servicing report of the transformer should be provided mentioning all the recommendations, determining the serviceability of transformer, assesing the further life of the transformer all as directed by the Engineer-in-charge.

All as per item No.40 here in above but of capacity 315 KVA to 500 KVA complete all as specified and directed.

All as per item No.40 here in above but of capacity 630 KVA to 1000 KVA complete all as specified and directed.

All as per item No.40 here in above but of capacity 1250 KVA to 1600 KVA complete all as specified and directed. Note for Item No.40 to 43 : (i) The cost of replacement of unserviceable nut, bolt with double washers, HT / LT tape used, M-Seal, Monoplast, cable end socket, etc shall deemed to be included in the quoted rate. (ii) For the inspection of internal defect of transformer, the contractor shall provide proper lifting arrangements like tripod, chain and pully, T&P, etc and the rent shall deemed to be included in the quoted rate. (iv) Contractor shall isolate the transformer from the supply and do earth the transformer properly while servicing the transformer.

Material and labour for repairing the damaged doors of the compact substations including replacement of door hinges, making the alignment of doors to ensure proper closing of the door, replacing the damaged door handle and providing number locks all as directed.

Servicing of OLTC and RTCC of transformer of capacity from 750 kVA to 1600 KVA comprising following work services :- (a) Opening of cover by removing nuts, bolts and all mounting accessories and conservator tanks for visual inspection. (b) Replacement of corroded nuts/bolts with double washers, burned lugs, etc by new one (e) Servicing of tap changing gears by cleaning and polishing tapping contact points.(f) Checking of mechanical operation (g) Checking of operation of RTCC including AVR (h) All the terminal connection of control and relay wiring to be checked and tighten.

Material and labour for disconnecting transformer of Oil filled type supply both HT/LT side, transporting to local workshop, opening transformer, removing the core and winding assembly, taking out the HT/LT burnt winding, turn varnishing, drying in oven, Clean the sludge of transformer oil and ensure that ducts are not blocked, Clamp the windings firmly without any movement. Adjust the vertical tie bars to tighten loose windings or spacers. Properly tight the special coil adjustment bolt, if provided, Check the proper operation of tap changing switch, Tight all connections and fix all fitments in position. Conduct insulation resistance test, Clean the bushing & stud and examine for cracks and chips, replace if required. De-hydration/filteration of oil for di-electric strength not less than 45 KV, topping up with new oil, checking HT/LT bush for desired IR value, re-assemble, transporting back to install the same with system, testing with NO LOAD & LOAD complete all as directed for any capacity. NOTE : (i) De-hydration and new oil for topping up will be measured and paid separately (ii) The crane and vehicle shall be provided by the contractor at his own risk and cost shall deemed to be included in the quoted rate. (iii) The test report of transformer after repair work shall be produced and verified by Engineer-in-charge.

Material and labour for disconnecting transformer Dry type supply both HT/LT side, transporting to local workshop, opening transformer, removing the core and winding assembly, taking out the HT/LT burnt winding, turn varnishing, drying in oven, Clamp the windings firmly without any movement. Adjust the vertical tie bars to tighten loose windings or spacers. Properly tight the special coil adjustment bolt, if provided, Check the proper operation of tap changing switch, Tight all connections and fix all fitments in position. Conduct insulation resistance test, Clean the bushing & stud and examine for cracks and chips, replace if required. checking HT/LT bush for desired IR value, re-assemble, transporting back to install the same with system, testing with NO LOAD & LOAD complete all as directed for any capacity. NOTE : (i) The crane and vehicle shall be provided by the contractor at his own risk and cost shall deemed to be included in the quoted rate. (ii) The test report of transformer after repair work shall be produced and verified by Engineer-in-charge.

Rewinding the Transformer Oil type of any capacity with new existing type super enameled copper winding winding of same gauge all as specified and as directed by the Engineer-in-charge.

Rewinding the Transformer Dry type of any capacity with new copper winding of existing material and specifications, of same gauge all as specified and as directed by the Engineer-in-charge.

De-hydration/ filtration of transformer oil by employing on line filtration plant to achieve di-electric strength not less than minimum 50 KV including following work services :- (a) Removal of all suspended particles such as dust, rust, scales, collided Carbone oxidation sludge, etc upto < 1 microne. (b) De-hydration of transformer oil under vacuum. (c) Circulation of heated oil and filling of treated oil in transformer tank. (d) Top up the transformer oil upto the level (e) Clean the transformer. NOTE : (i) Contractor shall use the vehicle mounted filtration plant with new suitable size heavy duty hose pipe. (ii) The transformer oil required for replacing/top up shall be measured and paid separately as "Supply only" (iii) Conducting field testing of di-electric strength of the transformer oil before and after filtration.(iv) The contractor shall submit the certificate for dehydration from the vendor for each transformer duly entered dielectric strength of oil before and after filtration.

Rectifying and arresting the oil leakage of transformer of any capacity, replacing the following components of the transformer such as gaskets, "O" rings, etc. Rectify the leaks in a variety of areas such as radiator fins, flanges, circuit breakers, valves, fastener assemblies, Oil leakage through pin hole / crack joint , drain valve / radiator valve , Oil leakages through Gasket joints. Applying putty/M-Seal Monoplast/brazing where ever necessary. NOTE : (i) Cost of all type of gasket, "O" rings, putty/M-Seal Monoplast, lugs, nut bolt, double washers, and cleaning of transformer etc shall deemed to be included in the quoted rate.

Supply only Transformer oil having dielectric strength not less than 45KV complete all as specified and directed.

Supply and fix silica gel of superior quality for air breather of transformer installed at Naval Base, Kochi complete all as specified and directed.

Supply and fix PVC breathing assy of Transformer with new silica gel 250 gm as per existing make and type complete all as specified and directed.

Supply and fix PVCbreathing assy of Transformer with new silica gel 500 gm as per existing make and type complete all as specified and directed.

Supply and fic PVC breathing assy of Transformer with new silica gel 1000 gm as per existing make and type complete all as specified and directed.

Supply and fixing in repairs brass terminal stud with nuts, check nut, oil seal and washer for HT side of transformer of any make as per sample up to 400 KVA transformer complete all as specified and directed.

Supply and fixing in repairs brass terminal stud with nuts, check nut, oil seal and washer for HT side of transformer of any make as per sample from 500 KVA to 1000 KVA transformer complete all as specified and directed.

Supply and fixing in repairs brass terminal stud with nuts, check nut, oil seal and washer for HT side of transformer of any make as per sample from 1250 KVA to 1500 KVA transformer complete all as specified and directed.

Supply and fixing in repairs brass terminal stud with nuts, check nut, oil seal and washer for LT side of transformer of any make as per sample up to 400 KVA transformer complete all as specified and directed.

Supply and fixing in repairs brass terminal stud with nuts, check nut, oil seal and washer for LT side of transformer of any make as per sample from 500 KVA to 1000 KVA transformer complete all as specified and directed.

Supply and fixing in repairs brass terminal stud with nuts, check nut, oil seal and washer for LT side of transformer of any make as per sample from 1250 KVA to 1500 KVA transformer complete all as specified and directed.

Supply and fixing in repairs bushing of HT side as per existing size/Model of the capacity up to 400 KVA transformer.

Supply and fixing in repairs bushing of HT side as per existing size/Model of the capacity 500 KVA to 1000 KVA transformer complete all as specified and directed.

Supply and fixing in repairs bushing of HT side as per existing size/Model of the capacity 1250 KVA to 1500 KVA transformer complete all as specified and directed.

Supply and fixing in repairs bushing of LT side as per existing size/Model of the capacity up to 400 KVA transformer complete all as specified and directed.

Supply and fixing in repairs bushing of LT side as per existing size/Model of the capacity 500 KVA to 1000 KVA transformer complete all as specified and directed.

Supply and fixing in repairs bushing of LT side as per existing size/Model of the capacity 1250 KVA to 1500 KVA transformer complete all as specified and directed.

Supply and fixing in repairs buchholz relay as per existing size/Model suitable for transformer up to 1500 KVA transformer complete all as specified and directed.

Supply and fixing in repairs transformer oil temperature gauge, range shall be 0 to 120 degree C as per existing type and model including taking down old one complete all as specified and directed.

Supply and fixing GM gate valve 15 mm dia, ISI Marked suitable for oil inlet/outlet valves of transformer including taking down old one complete all as specified and directed.

Supply and fixing GM gate valve 20 mm dia, ISI Marked suitable for oil inlet/outlet valves of transformer including taking down old one complete all as specified and directed.

Supply and fixing GM gate valve 25 mm dia, ISI Marked suitable for oil inlet/outlet valves of transformer including taking down old one complete all as specified and directed.

Shifting of standby trolley mounted transformer or any other transformer of capacity up to 750 KVA including its HT / LT cable from one location to another location and back to original site inside the Naval Base and Kataribagh by using toeing vehicle and crane if necessary. Dismantling the HT/LT connection of the existing faulty transformer, connecting the HT / LT cable of the trolley mounted transformer with the existing load, connecting the transformer with body and neutral earth with existing earth lead and testing with load complete all as specified and directed. NOTE : (i) The works includes the removal and refixing of all connection, cable, etc of both transformers. (ii) Contractor shall shift and connect the trolley mounted transformer immedeately within four hrs when AGE E&M / JE E&M inform through mobile message (iii) If contractor fails to shift the trolley mounted transformer within four hrs, a panality of Rs.3000.00 per hour after four hour shall be imposed. (iv) Rent of toeing vehicle, labour used, tools used shall deemed to be included in the quoted rate. (v) Contractor shall take care of transformer while shifting, any damage found while shifting will be rectify by the contractor at his own risk.

Material and labour for painting of transformers capacity up to 250 KVA with or without OLTC including HT/LT side marshalling box with one coat of synthetic enamel paint by using spray painting method after and including cleaning of existing surface of all dirt and greasy materials alongwith marking of SM/MES Nos with sticker letters n exc 2 cm height at appropriate places complete after isolating the transformer from the electric supply and to be earthed all as specified and as directed . Note: (i) The superficial area for the purpose of painting shall be considered approx 2 Sqm. (ii) Contractor's rep shall be present during the entire time of painting (iii) The safety of painter/electrician/supervisor/engineer working with transformer shall be at contractors risk. (iv) The rent of the air compressor, tools, etc shall deemed to be included in the quoted rate. (v) Marking of SM / MES No if any shall be deemed with quoted rate.

All as per item No.73 here in above but of capacity 315 KVA to 500 KVA complete all as specified and directed.

All as per item No.73 here in above but of capacity 630 KVA to 1600 KVA complete all as specified and directed.

Material and labour for hiring, transporting and finding the HT 11 KV/ LT UG cable fault location in any location inside Naval Base and Kataribagh area for any size of cable by using portable cable fault locator and marking the exact location all as directed .

Material and albour for repair/replacemnt of tap changer mechanism for up to 1600 KVA transformer onload tap changer including replacement of all the damaged parts such as coil, control wires, Hinge assembly, Kit for resistance assembly, fixed contacts, Main spring assembly, Link belt all as specified and as directed including service charges of OEM, frieght charges, labour charges etc..

Supplying and laying insulated mats for transformers of sizes 1m x 2m ISI marked for voltage upto 11 kv for electrical purpose as per IS 15652-2006, (superseding IS 5424) suitable for electrical shock safety all as specified and as directed.

Supply and fix 5mm thick plain or chequered Mild steel plates for transformer cable ducts, Fe-410- W(Grade- E-250) quality-B or over in thickness in available sizes complete all as specified and directed. Note:- (a) Rate quoted shall be inclusive of minor repairs to the existing trenches inside substations so that chequered mild steel plates will be fitted properly. (b) Rated quoted shall be inclusive of material and labour for relaying the cables inside the trenches completely covered by the chequered plates.

S&F danger notice plate 11KV all as specified and as directed.

Material and labour for painting of chequered Mild steel plates with high quality ename black colour paint all as specified and as directed.

Servicing of Compact Substations (CSS) having transformer dry type,11000 Volt / 433 Volts or 11000/380Volts step down/Step up, indoor/out door,type of capacity upto 1000 KVA comprising following work services :- (a) Disconnection of cable termination of HT & LT ends. (b) Visual inspection of the transformer, LBS, LT panel and cleaning dust and debris from cover louvers, screens, internal coil cooling ducts, doors, removing dust and debris from transformer core and windings, LBS, LT Pnael using blower all as directed. (c) checking of HT/LT insulators including internal inspection (d) Replacement of corroded nuts/bolts with double washers, burned lugs, etc by new one and tightening of all accessible hardware inclusing bushings, bolts and other connections. (e) Servicing of tap changing gears by cleaning and polishing tapping contact points.(f) Removing, cleaning, polishing of bushings and studs of both HT/LT side by using soft cotton cloth including checking for cracking and refixing the same. (g) Refixing all cable terminals HV & LV sides and transformer top cover, other fitments in position. (k) Connecting HT & LT side with existing incoming and outgoing cables including re-connection of earth strip/lead. (l) HT side cable connection shall be made with new HT tape & M Seal Monoplast as required at site. (m) All marshalling boxes to be cleaned. (n) All the terminal connection of control and relay wiring to be checked and tighten. (o) Examine the rollers carefully includes greasing them properly. (p) Measurement of winding resistances on both HV and LV sides (q) performing the Magnetic balance test (r) The servicing report of the transformer should be provided mentioning all the recommendations, determining the serviceability of transformer, assesing the further life of the transformer all as directed by the Engineer-in-charge.

Supply and fixing of incoming cable entry box of dimension 500mmx500mmx500mm of 2mm steel enclosure with 06 numbers 125mmx12mmx350mm size aluminium busbar strips for cables termination including all other accessories all as specified and as directed by Eng-in-Charge.

Supply and fixing of transformer bottom cable gland sheet of dimension 800mmx600mmx3mm sheet including all other accessories all as specified and as directed by Eng-in-Charge.

WELTRONENGINEERINGSERVICES (BID ID -3370268)

ELAN ENGINEERS (BID ID -3370039)