81376 REPAIRS/MAINTENANCE OF HT EXTERNAL SUPPLY, HT INFRASTRUCTURE, CALIBRATION OF VCBs, RMUs, PAINTING OF TRANSFORMERS AND CONNECTED WORKS UNDER GE TIRUNELVELI

Amount

Material and labour Cross arms, bracings, supports, clamps and back plates from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for both in any shape or size as indicated or directed and inclusive of one primer coat, one under coat and one finishing coat of paint including dismantling the unserviceable complete all as specified and as directed by Engineer-in-charge.

Material and labour Pin type, porcelain, vitreous, white, brown or green insulator including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, 150mm height, 150mm dia for 11000 volts grade / post insulator for A B Switch including dismantling the unserviceable complete all as specified and as directed by Engineer-in-charge.

Material and labour for Disc type insulator, porcelain, vitreous 145mm high and 255mm dia ball and socket type, white, brown or green Two-in-series' assembly for tension with tension clamps for conductors, working pressure 11000 volts including dismantling the unserviceable complete all as specified and as directed by Engineer-in-charge.

Material and labour for Loop type insulator, vitreous porcelain, white, brown or green Large size, with overall dimensions 140mm, clearance of hole 25.5mm including dismantling the unserviceable all as specified and as directed by Engineer-in-charge.

Material and labour for Stay assembly complete with accessories as shown in electrical plate No. 1 (loop type insulator, stay clamps, excavation and concrete measured separately) including 20 mm stay rod including dismantling the unserviceable complete all as specified and as directed by Engineer-in-charge.

Material and labour for Aluminium conductor, steel reinforced on 11 KV over head line including dismantling the unserviceable complete all as directed by Engineer-in-Charge.

Material and labour for Expulsion fuse single pole DO fuse assembly 11000 volts 100 Amps including dismantling the unserviceable compete all as directed by Engineer-in-Charge.

Material and labour for switch air break, gang operated, Triple pole, mechanically operated, mounted on insulator and steel frame, with operating mechanism worked from ground level, for current rating upto 200 amps, 11000 volts as specified and directed after removing the unserviceable the same all as directed by Engineer-in-Charge.

Material and labour for Lightning arresters expulsion type complete with all fittings, transmission class, discharge capacity 65 kilo amp, 11000 volts after removing the unserviceable the same all as directed by Engineer-in-charge.

Material and labour Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 sqmm to 95 sqmm after removing the unserviceable the same complete all as specified and as directed by Engineer-in-Charge.

Material and labour Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination 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 all as specified and directed complete all as specified and as directed

Material and labour Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 400sqmm after removing the unserviceable the same all as specified and directed complete all as specified and as directed

Material and labour Cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95sqmm after removing the unserviceable the same all as specified and directed complete all as specified and as directed

Material and labour for Cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 sqmm after removing the unserviceable the same complete all as specified and as directed by Engineer-in-Charge.

Material and labour for Cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 400 sqmm after removing the unserviceable the same all as directed by Engineer-in-Charge.

Supplying and laying reinforced precast concrete cable cover, but class HV, Type 1, flat, size 300mmx180mm x 40mm complete all as specified and as directed by Engineer-in-Charge.

Material and labour for providing pre cast cement concrete in 1:3:6 mix, type C1 (using 20mm graded stone aggregate) in coping for poles complete all as specified and as directed by Engineer-in-Charge.

Material and labour for PCC 1:4:8 type D2 with 40 mm Cement concrete in foundations, filling and mass concrete complete all as specified and as directed by Engineer-in-Charge.

Material and labour of painting steel & iron structure surfaces of 2/4 pole structure, painting to chain link fencing of 2/4 pole structure and substations yard with one coat of aluminium paint complete all as specified and directed. Note: 2/4 Pole or chain link fencing or substation yard complete painting measured as one job.

Supply and laying XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy-duty) with aluminium conductor, 11000 volts, grade cross sectional area 185 sq.mm complete all as specified and directed.

Dehydration and Filtration of transformer oil through on line method of transformers of different capacities through stream line filter unit to increase di -electric strength (BDV) of transformer oil not less then 50 KV for 1 minute at 2.5 mm gap including topping up transformer oil to the required level as indicated to each transformer and testing, transformer oil before and after filtration submission of records of test in duplicate all as directed by Engr-in-Charge. Note: Transformer oil for topping up will be measured and paid separately

Supply and Fill Transformer oil confirming to IS 335/93 grade suitable to topping up of transformers and OLTC tank through stream line filters while Dehydration complete all as specified and directed.

Material and labour for dismantling the 11 KV HT supply and isolating the distribution transformer of capacity 50/63/100/125/160/200/250 KVA draining out the insulating oil from the tank for dehydration. Removing the damaged gasket and replace the same size / thickness of new gasket in conservatory tank oil indicator, inlet outlet valve gasket in position replacing the defective, burnt bushes with gaskets and brass studs if required re filling back drained transformer oil and ensuring no leakages of oil from any part of the transformers and then testing energizing complete all as specified and directed Note: Fresh transformer oil for topping up will be measured and paid separately.

Material and Labour for replacing silica gel air breather container clear view type upto 0.5 Kg , first fill of good quality silica gel Unserviceable, Make: Suvida or equivalent as approved by GE

Material and Labour for replacing silica gel air breather container clear view type upto 1 to 1.5 kg, first fill of good quality silica gel, Unserviceable Make: Suvida or equivalent as approved by GE

Material and Labour for replacing silica gel air breather container clear view type 3.3 kg , first fill of good quality silica gel, Unserviceable Make: Suvida or equivalent as approved by GE

Dismantling all electric connections and taking down the transformer 63/100 KVA outdoor type, transporting to the reputed workshop, opening the top cover carefully, decanning the transformer oil in drum, taking out the core assembly and arresting of internal and external cracks with iron electrode and brazing, well finishing with existing colour code and fabricate the existing gauge of sheet, after lowering of core assembly heating the core assembly inside heat chamber upto required insulation level as per manufacturer instructions and lowering down inside the casing of transformer, connecting tap changer wiring, filling of dehydrated transformer oil and testing complete, transporting to site and commissioning after installation. Note: Transformer oil will be measured and paid separately for topping up.

Dismantling all electric connections and taking down the transformer 160 KVA outdoor type, transporting to the reputed workshop, opening the top cover carefully, decanning the transformer oil in drum , taking out the core assembly and burnt winding of LT side and rewinding with existing same gauge and size of copper conductor wire , with proper insulation , heating the core assembly inside heat chamber upto required insulation level per manufacturer instructions and lowering down inside the casing of transformer, connecting tap changer wiring , filling of dehydrated transformer oil and testing complete, transporting to site and commissioning after installation all as specified and directed 7 Note: Transformer oil will be measured and paid separately for topping up.

Dismantling all electric connections and taking down the transformer 200/250 KVA outdoor type, transporting to the reputed workshop, opening the top cover carefully, decanning the transformer oil in drum, taking out the core assembly and burnt winding of HT side and rewinding with existing gauge and size of copper conductor wire, with proper insulation , heating the core assembly inside heat chamber upto required insulation level as per manufacturer instructions and lowering down inside the casing of transformer, connecting tap changer wiring , filling of dehydrated transformer oil and testing complete, transporting to site and commissioning after installation. Note : Transformer oil will be measured and paid separately for topping up

Dismantling all electric connections and taking down the transformer 200 KVA outdoor type, transporting to the reputed workshop, opening the top cover carefully, decanning the transformer oil in drum, taking out the old conservator and supply and fixing conservator of same capacity and size and filled with oil through pipe line with proper level , heating the core assembly inside heat chamber upto required insulation level as per manufacturer instructions and lowering down inside the casing of transformer, connecting tap changer wiring , filling of dehydrated transformer oil and testing complete, transporting to site and commissioning after installation. Note: Transformer oil will be measured and paid separately for topping up.

Taking down old unserviceable cooling fins assembly and supply and fix new cooling fins of same size suitable for transformer capacity of 160 KVA complete all as specified and directed.

Taking down old unserviceable explosion vent supply and fix new explosion vent same size suitable for transformer capacity of 125 KVA complete all as specified and directed.

Taking down old unserviceable oil level indicator and supply and fix new oil level indicator of same capacity and size suitable for out door transformer of capacity 125 KVA complete all as specified and directed.

Taking down old unserviceable air release plug of outdoor transformer of capacity 250 KVA supply and fix new air release plug of same size complete all as specified and directed.

Taking down old unserviceable GI drain valve of size 40 mm and supply and fixing new drain valve of same size all as specified and directed complete all as specified and directed.

Taking down old unserviceable GI drain valve of size 25 mm and supply and fixing new drain valve of same size all as specified and directed complete all as specified and directed.

Opening the top cover of the transformer and OLTC chamber of 3.15/4 MVA power transformer carefully, decanning the transformer oil in drum removing the old worn out gasket and providing new gasket and replacing of defective fixed and movable contacts 8 sets of same size/thickness complete including refixing the top cover and refilling the oil complete all as specified and directed.

Material and labour for repair and servicing/overhauling of existing VCB porcelain clad 250/300 AMPS 33 KV out door 50H, 750MVA of Make MEGA WIN SWITCH GEAR Type MSP 36 including all unserviceable parts, wiring contactor, greasing of revolving of VCB Chamber, calibration of relay including decarbonising of VCB Panel and serviceability check from remote operation ,meters tripping coil check by phantom loading etc & testing on completion for satisfactory functioning all as specified and directed by Engineer in charge.

Material and labour for opening the cover of VCBs 11 KV and servicing/ of fixed and moving contacts, repair and replacement of fixed copper terminal/contacts (male and female), insulation tubes including other connected items to function of panel board , lamp indicators ,meters tripping coil, calibration of over load protection relay, time delay relay earth fault relay etc. cleaning the fixed and moving contact inside the VCBs properly, checking of spring charging mechanism, servicing and greasing all movable mechanism , replacement of defective fuses , wiring and reassembling and testing and serviceability check from remote operation complete all as per the direction of Engineer in Charge and manufacturer instruction

Servicing of RTCC panel, repair and replacement of defective components such as fuse carriers, cut outs, indicators meters etc checking and repair of wiring and made the panel serviceable in auto operation complete all as specified and directed by the Engineer-in-charge and manufacturer instruction

Material and labour for earthing complete with galvanised steel earth plate electrode 600 mmx600 mm x6.0mm thick buried directly in ground ( earth pit not less than 2.25 meters deep below ground level) with to edge of the plate not less than 1.5 Mtrs below normal ground level connected to galvanised earth strip of 32x6mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No 5 of SSR Part 1 - 1991 connected to earthing test point all as specified and indicated including testing on completion. Note: The rate is deemed to be inclusive of the cost of earth work, excavation on any type soil and removal of surplus soil to a distance of 50 Mtrs, PCC 1:2:4 type B1 for earth pit cover 6 NOs 8mm dia CTD Bar earth lead protection GI pipe medium grade 15mm size from earth plate electrode to main switch board

Supplying and laying synthetic Rubber insulated mats 3 mm thick for voltage upto 33 KV for electrical purpose as per IS 15652-2006, (superseding IS 5424) suitable for electrical shock safety of sizes 2m x 1m complete all as specified and directed.

Maintenance, testing and Servicing of CT/PT of 33 KV capacity including repair to get correct current & voltage ratio replacement of old gasket with new gasket of same type/size and topping up of new oil of same grade and replacement of old nut bolt washers etc. complete all as specified and directed.

Material and labour for LT bushing out door type for transformer, brass metal part as per IS 3347/1967 complete with bushing brass stem nut, bolt, washers, brass studs and gasket etc complete upto 200 KVA, 11/0.433 KV all as directed by Engineer-in-Charge.

Material and labour for HT bushing out door type for transformer , brass metal part as per IS 3347/1967 complete with bushing brass stem nut, bolt, washers, brass studs and gasket etc complete upto 200 KVA complete all as specified and directed.

Supply and Fix power pack unit with input voltage of 230VAC or 110 VAC single phase 50 Hz and output of 110VDC, 30Wsec (stored) and 110VDC, 75 W(Non stored) complete all as specified and directed.

Material and labour for painting the transformers with two coats of synthetic enamel paint of smoke grey colour including scraping and removing the old painted surfaces painting with two coats of supper enamelled paint colour of existing for following transformer capacities all as specified and directed:-

63 KVA capacity

Repair/Maintenance of A.B switch, gang operated of any type & size including cleaning of male & female contracts greasing of moving parts, replacement of unserviceable contacts, insulator, including operating GI pipe replacement if required all as specified & directed for smooth functioning of A.B switch all as specified and directed. Note: Post insulator & male / female contacts will be measured & paid separately under relevant items inclusive of replacement of miner worn out parts

(a) A.B switch 33 KV TP 400 Amps

(b) A.B switch 11 KV TP 200 Amps

Supply only male & female brass contact set for 33 KV A B switch, complete all as specified and directed.

Supply only male & female brass contact set for 11 KV AB switch, complete all as specified and directed.

Excavation in trenches not exceeding 1.5 M wide and not exceeding 1.5 M depth and getting out in hard/dense soil. complete all as specified and directed.

Returning, filling in incl spreading levelling, watering and well ramming in layers not exceeding 25cm thick. Complete all as specified and directed.

Removing excavated material to a distance not exceeding 50 M and depositing where directed at a level not exceeding 1.5 M above the starting point. Complete all as specified and directed.

Material and labour for detecting the fault in 11 KV HT cable of any size (with in 1 to 7 KM length), 3 core in trenches/ ducts with the help of electronic fault locating machine comprising of surge generator pulse, echo fault locator with high frequency distance calculator etc and exposing the cable fault removal of deteriorated fault portion of cable, treating the cable including making it ready for jointing work complete all as directed by Engineer-in-Charge Note:1. The quoted rate shall deemed to be included for the cost of earth work excavation as required. 2. Cable jointing kit shall be measured and paid separately.

Material and labour for laying and levelling stone aggregate loose filling using 40 mm graded stone aggregate around the transformer yards after removing the existing debris and stacking the existing aggregate complete all as specified and directed.

Material and labour Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 400sqmm after removing the unserviceable the same all as specified and directed complete all as specified and as directed

Supply and laying XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy-duty) with aluminium conductor, 11000 volts, grade "E", cross sectional area 95 sq.mm, 3Core complete all as specified and directed.

Supply and laying XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy-duty) with aluminium conductor, 11000 volts, grade "E", cross sectional area 400 sq.mm, 3Core complete all as specified and directed.

Material and labour for replacing silica gel from air breather container clear view type of good quality, complete all as specified and as directed

Material and labour for synthetic insulation mat of 2.0mx1.0m, 2.5mm thick suitable for 11000 volts electric supply as per IS 15652-2006 standard complete after removing the worn-out rubber mat all as specified and as directed by Engr-in-charge

Supply and spread stone dust sand in trenches for cable cushioning complete all as specified and as directed

M & L for opening the cover of RMU 11 KV servicing of fixed and moving contacts, repair and replacement of fixed copper terminal/contacts (male and female ), insulation tubes including other connected items for function of RMU, lamp indicators ,meters tripping coil, calibration of over load protection relay, time delay relay earth fault relay etc. Cleaning the fixed and moving contact inside the VCBs properly, checking of spring charging mechanism, servicing and greasing all movable mechanism , replacement of defective fuses, wiring, spares and reassembling and testing and serviceability check from remote operation upto satisfaction complete all as per the direction of Engineer in Charge and manufacturer instruction.

Supply and fix HT Potential Transformer(PT), 3 phase cast resin type 11/0.11KV, burden of 100VA/Phase, star-star connection complete all as specified and directed.

Supply and fix Current transformer, cast resin type 150-75/5/5 A, suitable for existing 11 KV panel complete all as specified and directed.

Supply and fix Vacuum Interrupter of 11 KV suitable for indoor VCB as per sample Complete all as specified and as directed by Engr-in-Charge.

Supply and fix HRC fuse link suitable for 11 KV grade PT of indoor VCB upto 3.15 Amps as per sample complete all as specified and as directed by Engr-in-Charge.

Supply and fix in replacement of digital non directional Over current and Earth fault protection relay numeric type with calibration as existing 11 KV HT panel including modification to existing panel as per site requirement including wiring complete all as specified and directed by Engr-in-Charge.

Material and labour for servicing/ testing/calibration of HT 11 KV relays ensuring of breaker tripping through relay by simulation CDG CDD complete for one panel complete such as Master trip relay, auxiliary relay etc complete all as specified and as per TNEB setting parameters as directed by Engineer-in-Charge

Material and labour for servicing/ testing/calibration of LT 440 Volts relays ensuring of breaker tripping through relay by simulation CDG CDD complete of ACBs of capacity 4000/3200/1600/800 Amps complete all as specified and directed by Engineer-in-Charge

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