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| 1 | Servicing/maintenance of ring main unit (RMU) 3/4/5 way 11 KV of any make, by disconnecting the power supply,visual inspection, general cleaning of the unit using blower/soft cloth, cleaning of all the contacts/bus bars etc with CRC solution and fine emery paper and removing all carbon deposits due to flashings, applying superior quality petrolium jelly on all contacts, checking and tightening all hardwares, checking all components/insulators/studs, adjusting male/female bushings in proper spacing, checking suitability and correct operation of protections, control instruments and electrical connections of the circuit breaker operating mechanism, verification of wiring circuits, lubricating all moving parts, checking/rapairing and properly adjustment of opearting system, checking operation of functional locks, interlocks, signalling devices and auxiliary devices, measurement of the resistance of the main circuit, checking for any gas leakage, making all HT supply connections and testing for proper working complete all as directed. |
| 2 | Material and labourfor repairing/ maintenance/ servicing of HT11 KV VCB alongwith CTs/PTs of capacity upto 1250 A of any make and type by drawing out breaker from panel and carry out the following works complete all as specified :- |
| 3 | (a) Tripping off the breaker and racking out the breaker trolley complete from the panelfor servicing/inspection/overhauling. |
| 4 | (b) Servicing/Inspecting/checking of automatic safety shutter operation for serviceability and adjusting for proper operation. |
| 5 | (c) Servicing/Inspecting/checking ofcircuit spoutsand circuit spout connections for RYB phases. |
| 6 | (d) Checking of cross bar assembly, fixed contacts and current carrying parts of the breaker complete. |
| 7 | (e) Cleaning/decarbonizingof all fixed and moving contacts, levers, springs, etc with soft emery paper , CRC solution and soft dry cloth to remove all carbon deposits and tightening allscrews, nuts, bolts, spring etc and incl applying superior quality petrolium jelly on all contacts. |
| 8 | (f) Checking of safety/tripping relays and AC/DC power supply circuits for proper functioning. |
| 9 | (g)Checking, setting and adjustment of rack in/rack out, spring charging system and operation of the breaker trolley. |
| 10 | (h)Lubrication and greasing of breaker operating mechanism, all moving parts of the trolley, stopper bolt for proper operating and closing of shutter gear etc. |
| 11 | (j) Checking of all end terminals, tightening of all earth connections, tightening all hardware, rack-in the breaker, put in position, engage the VCB with the supply systemand testing for smooth functioning |
| 12 | Notes: (i) The rate quoted shall be deemed to include for necessary T&P, nuts, bolts, washers, gasket, insulation tapeetc. and testing and commissioning all as specified and as directed by the Engineer-in-Charge.(ii) Servicing/maintenance of VCBs shall be carried out by auhtorised service centre/agency/rep of any OEM as approved by GE. |
| 13 | M & L for rewiring of the complete control circuits of 11 KV HT VCB of any make with single core copper conductor cable of size as per existing for metering/ safety relays/ indicators/ charging system/ tripping closing wiring circuits/ connections from CTs/ PTs/ cubical lamp & socket/thermostat & space heater/DC power supply system for relays etc incl numbering ferrules for marking of the circuits complete all as specified and directed. |
| 14 | Supply only Rack in Rack Out Handle as per existing size, type and suitable for 11 KV VCB of any make/type complete all as specified and directed. |
| 15 | Supply only Spring Charging Handle as per existing size, type and suitable for 11 KV VCB of any make/type complete all as specified and directed. |
| 16 | Supply and fixing in repairs auxiliary Switch (7NO + 7NC) as per existing size/type and suitable for 11 KV VCB of any make and type complete all as specified and directed. |
| 17 | Disconnecting and taking out protection relays/ trip relays of any make and any type from HT panel boards, cleaning all the contacts properly, calibrating the relays by conducting secondary injection tests, checking of current transformers, checking the complete wiring circuits and rectification of defects in control wiring for proper tripping of circuit breakers through CTs and relays, reinstallation of relay into the system, making all connections, testing & commissioning complete all as specified and directed. |
| 18 | Supply and fixing in repairs tripping coil assembly 24 volts DC suitable for 11 KV HT VCB of any make and as per existing size/ type complete all as specified and directed.. |
| 19 | Supply and fixing in repairs closing coil assembly 24 volts DC suitable for 11 KV HT VCB of any make and as per existing size/type complete all as specified and directed. |
| 20 | Supply and fixing in repairs drive link assembly with adjustor as per existing size/ type and suitable for 11 KV HT VCB of any make and type complete all as specified and directed. |
| 21 | S and F in replacement voltage transformer ratio 11 KV/ 110 volts confirming to IS-3156 1992, 50 Hz, class B insulation with primary voltage 11 KV/ RT3 and secondary voltage 110 V/RT3, 50 VA, class 1.0 3P, type phase to earth complete incl making all connections complete all as specified and directed. |
| 22 | S & F in repairs HT current transformer suitable for 11 KV HT RMU having ratio 200-100/1 A, burden 4 VA, 50 Hz , Class 5P, accuracy level factor 10 complete making all connections and testing for proper working complete all as specified and directed. |
| 23 | S & F in replacement HT current transformer suitable for 11 KV HT VCB of any make , having ratio 400/200 - 5 amps or 300/150 - 5 amps or 200/100 - 5 ampsaccuracy class 1.0 5P10, 10 VA, 50 Hzincl making alll connections complete all as specified and directed. |
| 24 | S & F in repairs DC power pack with battery back up , input 230 volts AC and output 24 volt DC, capacity 100 watt 4 amps complete with operation indicators, terminal block, safety fuse etc and making connections with the existing circuits in HT VCB panels complete all as specified and directed. |
| 25 | S & F in repairs relay provided on HT 11 KV SF-6 RMU panels for incoming and outgoing feeders for healthy tripping for over current and earth fault self powered numerical protection relay and testing for proper working complete all as specified and directed. |
| 26 | S & F in repairs single pole high speed master tripping relaysuitable for working on 24 volt DC, high burden type, flush mounting, with output contacts 3 NO 1 NC and hand reset opeartion indicator suitable for 11 KV HT panel for protection system complete all as specified and directed. |
| 27 | S & F in repairs feeder protection relay with features of overload relay tripping, 3 phase over current and earth fault trippingsuitable for working on 24 volt DC or 220 volts sigle phase AC as per existing, flush mounting, suitable for 11 KV HT panel for feeder protection system complete all as specified and directed. |
| 28 | Disconnecting power supply and taking out old defective batteries from the DC supply power panel, general cleaning of DC supply panel , supply and fixing new maintenance free lead acidsealed batteries 2 volt 100 AH capacity - 15 nos and making all series connections, checking and repairing the power circuit for proper charging and AC/DC supply changeover, checking all the circuits and replacing any defective parts such as relays etc, testing and commissioning complete all as specified and directed. |
| 29 | Supply and filling SF- 6 gas to maintain required pressure in RMU complete all as specified and directed. |
| 30 | S & F in replacement seal of RMU gas chamber/bottle after disconnecting of all the connections and remaking all connections for 11 KV HT RMU of any make and type complete all as specified and directed. |
| 31 | S & F in replacement HT danger notice plate of size 250mm x 200 mm duly pasted on 11 KV HT VCB panels complete all as specified and directed. |
| 32 | S & F in repairs LED indicators on the existing HT 11 KV panel boards all as per existing size/colour complete all as specified and directed. |
| 33 | S & F in replacement three way control swich for ON/OFF opeartion of 11 KV HT VCB all as per existing complete all as directed. |
| 34 | S & F in repairs RMU SF-6 breaker mechanism system suitable for ABB safe plus breakerscomplete all as per existing complete all as specified and directed. |
| 35 | Supply and fixing in repairs copper connection forC.T. With nut, bolt and double washers for 11 KV VCB of any make all as per existing complete all as specified and directed. |
| 36 | Supply and fixing in replacement vacuuminterrupter suitable for 11 KV HT VCB of any make/type800 amps capacity complete all as per existing size and type complete all as specified and directed. |
| 37 | Supply and fixing in repairs spring loaded tulip contact, suitable for 800 amps 11 KV HT VCBof any make/type complete all as specified and directed. |
| 38 | Supply and fixing in repairs spring loaded tulip contact, suitable for 1250 amps 11 KV HT VCBof any make/type complete all as specified and directed. |
| 39 | M & L duct covers made from chequred MS platesincl cutting to required shape as per site requirement, painting with two coats of black enamelled paint over a coat of red oxide primer complete all as specified and directed. |
| 40 | Supply and fixing in repairs space heater 240 volts single phase as per existing size/type and suitable for 11 KV VCB of any make complete all as specified and directed. |
| 41 | Supply and fixing in repairsthermostat for space heater , single phase range 0 to 90 degree celcius all as per existing size/type and suitable for 11 KV VCB of any make complete all as specified and directed. |
| 42 | S & F HT heat shrinkable type outdoor end termination cable jointing kit with jointing material and accessories sutable for 11000 volt (Earthed) grade XLPE cable of size 95 Sqmm, 3 core complete all as specified and directed. |
| 43 | S & F HT heat shrinkable type outdoor end termination cable jointing kit with jointing material and accessories sutable for 11000 volt (Earthed) grade XLPE cable of size 120 to 185 Sqmm, 3 core complete all as specified and directed. |
| 44 | S & F HT heat shrinkable type outdoor end termination cable jointing kit with jointing material and accessories sutable for 11000 volt (Earthed) grade XLPE cable of size 240 Sqmm, 3 core complete all as specified and directed. |
| 45 | S & F HT heat shrinkable type indoor end termination cable jointing kitsutable for 11000 volt (Earthed) grade XLPE cable of size 95 Sqmm, 3 core complete all as specified and directed. |
| 46 | S & F HT heat shrinkable type indoor end termination cable jointing kitsutable for 11000 volt (Earthed) grade XLPE cable of size 120 to 185 Sqmm, 3 core complete all as specified and directed. |
| 47 | S & F HT heat shrinkable type indoor end termination cable jointing kitsutable for 11000 volt (Earthed) grade XLPE cable of size 240 Sqmm, 3 core complete all as specified and directed. |
| 48 | S & F in replacement three phase digital type voltmeter with input 0-110 VAC and range 0-11 KV AC , accuracy ± 1.0%, PTR 11 KV/ V3/ 110V/ V3, square shape size 96x96 mm , flush mounting type ,on the HT 11 KV panel boarrds at various locations all as per existing incl making all connections with control wiring and testing for proper working complete all as specified and directed. |
| 49 | S & F in replacement three phase digital type ammeter with input 0-5 AAC and range 0-200 AAC, accuracy ± 1.0% , square shape size 96x96 mm , flush mounting type ,on the HT 11 KV panel boarrds at various locations all as per existing incl making all connections with control wiring and testing for proper working complete all as specified and directed. |
| 50 | S & F in replacement contact arm suitable for HT 11 KV VCB of 800 amps capacity of any make and type complete all as specified and directed. |
| 51 | M & L chequred rubber mat for electrical purpose ISI marked of size 1 mtr X 2 mtr and 19 mm thickness complete all as specified and directed. |
| 52 | S & F in replacement electric motor 230 volts AC suitable for operating mechanism of HT 11 KV VCB of of any make/type complete all as per existing and testing for proper functioning complete all as specified and directed. |
| 53 | Supply and fixing in repairs door handle kit suitable for HT VCB 11 KV 630/ 800/ 1250 amps capacity of any make, for proper locking of the main door complete all as specified and directed. |
| 54 | S & F in replacement bus bar spoute bushing suitable for HT 11 KV VCB panel board of of any make and type complete all as specified and directed. |
| 55 | Excavation in post holes (or similar holes) each not exc 0.5 Cum, getting out, returning filling in and ramming earth or broken rubble mixed with earth around, in layers not exc 25cm, watering, and removing surplus soil to a distance not exc 50m and making good surface complete in soft/loose soil complete all as specified and directed. |
| 56 | Taking down existing chain link fencing from any type of post complete all as specifed and directed |
| 57 | Dismantling RCC Post or struts any section including taking down embedded portion and making good disturbed ground complete all as specifed and directed |
| 58 | M&L in repairs for mild steel work as of posts and struts in fencing including cutting tops to shape as directed, drilling holes, notching for wire etc flat iron fillets (for securing wire mesh etc) including all necessary drilling, bolting or riveting etc and similar work confirming to Fe-290 Gde E-165 complete including painting with two coats of synthetic enamel paint of approved colour over a coat of red oxide primer complete all as specified and directed. |
| 59 | Supply and fixing of Galvanized Steel Chain Link fencing of mesh size 50mm x 50mm and dia of wire 4.00 mm with and including line wires fixed to any type of standards, rails, straining bolts, etc. including provision of binding wire complete all as specified and directed |
| 60 | Supply and fix 10 mm dia mild steel round bar as in line wire for chain link fencing fixed with GI wire including including painting with two coats of synthetic enamel paint of approved colour over a coat of red oxide primer complete all as specified and directed. |
| 61 | Surface excavation n.exc (not exceeding) 30 cm deep and averaging 15cm deep and getting out in hard/dense soil in the transformer yard complete all as specified and directed. |
| 62 | Supply and spread graded coarse aggregate of 63mm nominal size around outdoor transformer and HT 11 KV two/four pole structure complete all as specified and directed. |
| 63 | M&L for Brickwork with sub class ‘B’ bricks, straight or curved on plan exc 6 m mean radius with old size bricks built in Cement Mortar 1:6, including demolition of brickwork in any type of mortar complete all as specified and directed. |
| 64 | M&L forrendering 10 mm thick cement plaster 1:6 on fair faces of brick work or concrete surfaces finished even and smooth (with out using extra cement) complete all as specified and directed. |
| 65 | Earthing complete with galvanised steel earth plate electrode 60cmx60cmx6 mm thick burried directly 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 Mtr below normal ground level, connected to galvanised earth lead strip 32x6mm diaby means of bolts, nuts, check nuts and washers of GI or steel all as shown in electrical plate No. 5 of SSR Part-I 1991 connected to earthing test point panel all as specified or indicated and testing on completion as directed by the Engineer-in-Charge including necessary excavation & earth work in any type of soil, funnel, PCC chamber (1 : 3 : 6) type C1, CI pit cover and frame , charcol, salt includingearth lead protected by 40 mm dia medium grade GI pipe and 20mm dia medium grade GI Pipe for watering complete all as specified and directed. |
| 66 | Note :- Earth lead strip 32 x 6 mm and GI 40 mm dia protecion pipe upto 7.5 mtr length will be deemed to include in the unit rate quoted. |
