REPAIR AND REFURBISHMENT OF EXTERNAL ELECTRIFICATION WITH LIGHTENING CONDUCTOR EARTHING MAIN SWITCH GEARS PARTS OF TRANSFORMER, VCBs AND ALLIED SERVICES IN AF DOMESTIC AREA UNDER GE AVADI

Amount

Overhauling / servicing of HT, 11KV, 50Hz, oil circuit breaker, 400Amps, 250MVA capacity including thorough inspection of the OCB and carrying out the following maintenance nature of works for proper and efficient functioning of OCB's all as specified and as directed. Make of OCB panel - Crompton Greaves.

(i) Check, clean, align, adjust / tighten all terminals of fixed and moving contacts, apply petrolleum jelly to all surfaces of contacts check insulation resistance and set for proper functioning. (ii) Check, clean, align, adjust / tighten all terminals of trip coil check insulation resistance and set for proper functioning. (iii) Check, clean, align, adjust / tighten all terminals of potential transformer and current transformer, check insulation resistance and set for proper functioning. (iv) Check, clean, align, adjust / tighten all terminals of Internal wiring circuits of complete panel, replace unserviceable fuse, check insulation resistance and set for proper functioning.

(v) Check transformer oil (insulating oil) of the complete OCB filter with filtration plant equipment and testing of oil. (vi) Check, clean, align, adjust / tighten all terminals of over load and earth fault relay units, conduct secondary injection test on each relay, set for proper function / activation for tripping the OCB whenever fault occurs. (viii) Check, clean, align, adjust / tighten all terminals of Battery bank with battery charger and wiring connections to and from battery, check voltage, charging system etc., rectify defects, if any and test for proper functioning. (ix) Check, clean, align, adjust / tighten all terminals of Earthing at VCB's and earth pits, carry out earth resistance test of all earth electrodes.

Overhauling / servicing of HT, 11KV, 50Hz, vaccum circuit breakers, /SF6 400Amps, 250MVA capacity including thorough inspection of the VCB and carrying out the following maintenance nature of works for proper and efficient functioning of VCB's all as specified and as directed. Make of VCB panel - Crompton Greaves.

(i) Check, clean, align, adjust / tighten all terminals of fixed and moving contacts, apply petrolleum jelly to all surfaces of contacts check insulation resistence and set for proper functioning. (ii) Check, clean, align, adjust / tighten all terminals of trip coil check insulation resistence and set for proper functioning. (iii) Check, clean, align, adjust / tighten all terminals of potential transformer and current transformer, check insulation resistence and set for proper functioning. (iv) Check, clean, align, adjust / tighten all terminals of Internal wiring circuits of complete panel, replace unserviceable fuse, check insulation resistance and set for proper functioning. (v) Check, clean, align, adjust / tighten all terminals of over load and earth fault relay units, conduct secondary injection test on each relay, set for proper function / activation for tripping the VCB whenever fault occurs.

(vi) Check, clean, align, adjust / tighten all terminals of bus bars terminal connections check insulation resistance. (vii) Check, clean, align, adjust / tighten all terminals of Battery bank with battery charger and wiring connections to and from battery, check voltage, charging system etc., rectify defects, if any and test for proper function. (viii) Check, clean, align, adjust / tighten all terminals of Earthing at VCB's and earth pits, carry out earth resistance test of all earth electrodes. Note for Item No: 1 and 2 (i) The entire overhauling / servicing works including replacement of unserviceable parts as described above, of the OCB's and VCB's shall be carried out through any authorised service dealer / centre of M/s Crompton Greaves and necessary test certificate for satisfactory function of the OCB and VCB/SF6 panels and system from the authorised service dealer / service centre shall be submitted in triplicate. (ii) Dismantling and replacement of unserviceable parts shall be measured and paid for separately.

Dismantling and removing unserviceable indicator lamps from HT OCB / VCB panels, Supply and fix same type / model / capacity indicator lamps connecting up and testing all as directed.

Dismantling and removing unserviceable digital ammeter / voltmeter / frequency meter, panel flush mounting type, from HT OCB / VCB panel, Supply and fix same type / model / capacity digital type meter connecting up and testing.

Dismantling and removing unserviceable fuse units from HT OCB / VCB panels, and Supply and fix same type / model / capacity fuse units connecting up and testing all as directed.

Dismantling and removing unserviceable trip catch from 11KV VCB, supply, fix connect and test trip catch with all linkage assemblies suitable for 11KV VCB. Make : Crompton Greaves.

Dismantling and removing unserviceable rack in and rack out segment gear from 11KV VCB, supply, fix, connect and test rack in rack out segment gear suitable for 11KV VCB. Make : Crompton Greaves.

Dismantling and removing unserviceable big gear and small gear assembly from 11KV VCB, supply, fix, connect and test big gear and small gear assembly suitable for 11KV VCB.Make : Crompton Greaves.

Dismantling and removing unserviceable spring charging motor from 11KV VCB, supply, fix, connect and test spring charging motor suitable for 11KV VCB. Make : Crompton Greaves.

Taking down defective transformer 11KV / 0.433 KV step down capacity from 63 KVA to 500 KVA capacity from pole / structures after disconnecting all electrical connection removing from sub station as directed., and refixing the same after repairs including transportation / loading / unloading of transformer from sub station to work site and connecting HV / LV side including all connecting and jointing materials such as suitable size of lugs, bolts, nuts etc., complete all as directed.

Opening / striping off transformer 11KV / 0.433 KV step down capacity from 63 KVA to 500 KVA including draining off oil, lifting the core and coil assembly, washing and cleaning dust, dirt and sludge deposit etc., from all parts. Remvoing damaged / defective parts, making internal connection servicing of tap changer and reassembling the transformer after repair and replacement defective parts including Supply and fix new cork sheet, gasket, packing nuts, bolts, washer etc., complete as required filling fresh transformer oil and testing complete. Note : Fresh transformer oil and other spare parts incorporated shall be measured under relevant item.

Supply and fix high voltage coil including double paper insulated conductor of same gauge as per existing and all insulating material, varnishing with vaccum impregnation and baking of coil suitable for various capacities of step down transformer of copper wound all as directed.

Supply and fix low voltage coil including double paper insulated conductor of same gauge as per existing and all necessary insulating material varnishing with vaccum impregnation and baking of coil suitable for various capacities of step down transformer of copper wound all as directed.

Supply and fix HV porcelain bushing of 11KV grade with gasket suitable for step down transformer upto 500KVA capacity complete.

Supply and fix LT brass stud with 5 Nos brass nut, brass washers, check nuts, conical rubber bush etc., for transformer upto 500 KVA capacity complete.

Supply and fix oil level indicator suitable for transfomer upto 500KVA capacity complete including taking existing unserviceable indicator.

Supply and fix of oil temperature gauge as per IS specification complete all as specified and directed, suitable for Transfomer upto 500 KVA capacity complete including taking down existing unserviceable temprature gauge

Supply and pouring the new transformer oil after dehydration and dielectric strength should not be less than 60KV at 2.5mm gap for duration of one minute. Insulating (transformer) oil conforming to IS 336 for filling / topping up of transformer complete. Note : New transformer oil shall be supplied in the sealed barrel (209 ltrs).

Dismantling existing unserviceable breather assembly complete with silical jell from the transformers, Supply and fix new breather assembly of same type filled with new silica jell for transfomers upto 500KVA capacity at site.

Dismantling existing unserviceable tap changer assembly complete from the transformer upto 500KVA at site, Supply and fix new assembly of same type and testing all as directed.

Filteration of trasformer oil from transformers of any make / model / type, pole or plinth mounted, installed at various locations under ON load conditions, through portabel filteration plant capable of filteration, circulation and heating continuously for a period of minimum 4 hours or till such time the die electric strength of transformer oil with stands 50KVA at 2mm gap for one minute all as directed. Note : 1. Transformer oil shall be tested at site before and after filteratiion and record maintained. 2. Filteration plant shall be shifted transported from one sub station to another on completion of work at each site.

Material and Labour for painting outer surfaces of transformers of capacity above 100KVA, any type / make / model, pole or plinth mounted, installed at various sub stations with one coat of synthetic enamel paint of approved colour, after cleaning all surfaces including writing by paint SM / MES numbers, capacity, make, date of oil testing etc., all as directed. Note: Approximately one litre paint will be required for one trasnformer.

Material and Labour for painting outer surfaces of transformers of capacity upto and 100KVA, any type / make / model, pole or plinth mounted, installed at various sub stations with one coat of synthetic enamel paint of approved colour, after cleaning all surfaces including writing by paint SM / MES numbers, capacity, make, date of oil testing etc., all as directed. Note: Approximately half litre paint will be required for one trasnformer.

Supply and fixing copper Earthing continuity conductor or main earthing lead of size 20 x 3 mm copper strip fixed to wall on batten or recess or chases or buried in ground or drawn in existing conduit / pipe or fixed to poles or any other indicated situation for loop earthing etc. including taking down old strip all as directed.

Excavation in trenches not exceeding 1.5mtr. In depth and not exc 1.5mtr in width and getting out in soft/ loose soil for laying of cable etc all as directed

All as per item No 25 but exceeding 1.5 m and not exceeding 3.0 m in depth for foundation of pole etc.

Returning, fillling in trenches, including spreading, levelling, watering and well ramming in layers not exceeding 25cm thick using soil obtained from excavation all as directed.

Removing excavated material/ surplus soil and depositing where directed at a distence not exceeding 50mtr.at a level not exceeding 1.5 mtr from strting point.

Supply lay/spread in trenches, dry river sand, clean, including spreading, levelling, punning for laying /cushioning of cables all as specified in clause No 19.75 of SSR Part I and as directed.

Material and Labour for sub class 'B' bircks of standard size for cable protection, laid across the trench all as specified and directed.

Supply , laying, connecting and testing HT UG cable XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armored, electric power cable (heavy duty ) with stranded aluminium conductors , 11000 volts (earthed) grade cross sectional area 120 Sq mm 3core. including taking down old cable all as directed.

Supply and fix/errect/ground, HT cable route indicator, made out of GI plate 3 mm thick and 6 inches dia duly marked with working voltage, size of cable and route , fixed with angle iron of size 25 mmX 25 mm X 3 mm thick , 50 Cm long embedded in PCC 1:2:4, type B1 of size 30 Cm X 30 Cm X 30 Cm in ground complete all as specified and as directed. NOTE :- Rate quoted deemed to be inclusive of PCC, excavation and earth work.

Dismantling of U/S joint and Material and Labour cable end jointing kit for 11 KV grade cable for outdoor termination heat shrinkable type joint complete with jointing materials and accessories suitable for 3 core XLPE armnoured aluminium conductor cable for 120 Sqmm to 185 sqmm connecting up and testing all as specified and directed.

Dismantling of U/S joint and Material and Labour cable end jointing kit for 11 KV grade cable for Indoor termination hot shrinkable type joint complete with jointing materials and accessories suitable for 3 core XLPE armnoured aluminium conductor cable for 120 Sqmm to 185 sqmm connecting up and testing all as specified and directed.

Dismantling HT cable straight through joint and Material and Labour for cable jointing, heat shrinkable, straight through type, complete with all accessories and insulating material / compound etc., as per manufacturer's instruction, suitable for HT, 11000 volts, XLPE UG cables of size 3 core 95 / 120 sq.mm connecting up and testing all as specified and directed.

Dismantling unserviceable lighting arrestor and Supply and fix Lightning Arrestor, HT, 11000 volts, expulsion type, complete with all fittings, transmission class, discharge capacity 65 Kilo Amps all as directed

Supply and fix Air break gang operated switch, HT, 11000 volts, Triple pole mechanically operated, mounted on insulators and steel frames with operating mechanism worked from ground level with operating rod, handle etc., for current rating up to 200 Amps, fixed on pole / structures including taking down the existing unserviceable air break switch all as directed.

Material and Labour for HT, 11000 volts grade , DISC type insulator, single disc assembly, of size 145 mm height and 255 mm dia , ball and socket type, porcelain, vitreous, white or brown , for tension with tensile clamps for conductors. including taking down the existing unserviceable.

Material and Labour for cross arms, bracings, supports, clamps, back plates etc., fabricted with strututral steel sections including bolts, nuts, washers etc., welding , bending cold or hot, drilling holes for bolts, in any shape or size, as indicated or as directed and inclusive of one coat of primer, one under coat , and finishing coat of aluminium paint all as directed.

Dismantling of overhead HT lines ACSR conductors of any size, from poles /insulators, restringing / refixing the same with necessary aluminum binding wires, for reducing sag on conductors etc., all as directed.

Supply and fix Horn Gap type Fuse unit, 11000 volts grade, mounted on insulators and steel frame, single pole, fixed on DP structures all specified and as directed including dismantling existing unserviceable fuse unit.

Material and Labour for in replacement of numerical over current protection relay (2OC + 1 EF + 1 REF IDMTL and INST. Protction ) digital type alongwith high set facility suitable for 11 KV HT VCB including provisioning blanking sheet to match the existing surface of the VCB Make: Compton Greaves cat NO- CGI 14C or equivalent L&T/ ABB / AREVA

Supply and fixing resin cost current transformer 11 KV indoor type of protection and metering of accuracy class-1, 5P 10 dual core of ratio 100/50/5 amps, 15 KVA burden by dismantling of existing CT's by disconnecting supply complete all as specified and directed.

Supply, test and commissiong of potential Transfomer 11KV, 50Hz, Class- 0.2, Burdrn -50VA, fixed type 3 phase resin cast indoor type , dismantling of existing PT's by disconnecting supply complete all as specified and directed.

HARI ENTERPRISES

PSK Enterprises

EASHWAR ELECTRICALS