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| 1 | Taking down HT switch gear (Vacuum circuit breaker ) of capacity 11 KV 250/350 MVA , up to 1250 Amps comprising of following repairs, servicing, carrying out preventive maintenance and refixing the same after repairs/ servicing. |
| 2 | (a) Tripping off the breaker, lowering the breaker with raising/lowering handle and pulling out the breaker complete from the panel along with the trolley for servicing/inspection/overhauling |
| 3 | (b) Servicing/Inspecting/checking of automatic safety shutter operation for serviceability and replacement of spares if required. |
| 4 | (b) Servicing/Inspecting/checking of circuit spout and circuit spout connections for RYB phases and replacement of spares if required. |
| 5 | (c) Dismantling and checking of cross bar assembly, fixed contacts and current carrying parts of the breaker, trolley, insulated assembly and checking lamination with clamps, epoxy spout, isolator assembly etc. |
| 6 | (d) Setting, reassembling, cleaning, adjustment of fixed contacts, main contact, arcing contacts and chamber baffle pot assembly, moving contact for proper setting of auxiliary contacts operating mechanism. |
| 7 | (e) Servicing/Inspecting/checking of secondary sockets/busbar earthing plugs/earthing sockets and replacement of spares if required. |
| 8 | (f) Checking, setting and adjustment of lowering and raising operation of the breaker trolley. |
| 9 | (g) Lubrication and greasing of all moving parts of the trolley, stopper bolt for proper operating and closing of shutter gear, isolation resistance of trolley of with vacuum interrupter assembly. |
| 10 | (h) The inspection of HT switch gear shall involve:-(i) Inspection of truck & hoist assembly.(ii) Inspection of assembly & components of solenoid assembly.(iii) Inspection of assembly & components of dependent mechanism.(iv) Inspection of assembly & components of spring box mechanism.(v) Inspection of motor mechanism spring charge assembly (vi) Inspection of assembly of trip unit & related components, Indoor type |
| 11 | Notes: (i) The rate quoted shall be deemed to include for necessary T&P, nuts, bolts, washers, gasket, insulation tape, compound, to put in to the VCBs and panels in serviceable condition, testing and commissioning all as specified and as directed by the Engineer-in-Charge.(ii) Major spares like Breaker bushings, vacuum interrupter, busbar spout, busbar spout connections, circuit spout/circuit spout connections/buffer fixed contacts, moving contacts, solenoid spares, dependent/spring mechanism/ motor mechanism, trip unit etc will be measured and paid separately under relevant items of Schedule 'A'. However the rate quoted shall be deemed to include for any other minor spares require replacement. |
| 12 | All as per Item No1 above but of capacity 33 KV 250/350 MVA , up to 2000 Amps |
| 13 | Supply only the following spares suitable for 11/33 KV HT VCB panel repair work under relevant Schedule. |
| 14 | (a) Torsion spring suitable for 11KV VCB |
| 15 | (b) Torsion spring suitable for 33 KV VCB |
| 16 | (c) Motor cut off switch suitable suitable for 11KV VCB |
| 17 | (d) Motor cut off switch suitable suitable for 33 KV VCB |
| 18 | (e) Charging motor suitable for 11KV VCB |
| 19 | (f) Charging motor suitable for 33 KV VCB |
| 20 | (g) LED Indication Lamps |
| 21 | (h) Shunt trip coil 110 V DC/220 V DC |
| 22 | (j) Shunt trip coil 110 V DC/220 V DC with assembly |
| 23 | (k) Breaker control switch |
| 24 | (l) Busbar Spout |
| 25 | (m) Circuit spout |
| 26 | (n) Control circuit fuses 2 A to 63 A |
| 27 | (o) HRC fuse (PT HT side) |
| 28 | (p) PT plug contact |
| 29 | (q) VCB buffers |
| 30 | (r) 110 Volt DC closing coil assembly |
| 31 | (s) Push to trip knob red assembly |
| 32 | (t) Push to trip knob green assembly |
| 33 | (u) Ratchet wheel |
| 34 | (v) Nylon release lever |
| 35 | (w) VCB charging powl |
| 36 | (x) Shutters for racking shaft |
| 37 | (y) Bus bar support insulator for VCB panel |
| 38 | (z) Vacuum interrupter |
| 39 | (aa) Monoblock for busbar spout/circuit spout |
| 40 | (ab) Spring drum suitable for 11KV VCB |
| 41 | (ac) Spring drum suitable for 33 KV VCB |
| 42 | (ad) Spring suitable for 11 KV VCB |
| 43 | (ae) Spring suitable for 33 KV VCB |
| 44 | (af) Roller chain suitable for 33/11 KV VCB |
| 45 | Material and labour for Strip Opening the busbar of the HT 11 KV VCB panels for decarbonising of busbar and connected items/removing the old teared/ unsv insulation from the bus bar, checking the IR value before fixing the HT sleeve and refixing the heat shrinkable insulating tape and sleeve suitable for 11 kv busbar not less than 3mm thick having dielectric strength not less than 15kv/mm and HT insulation tape for CT/ PT connection complete painting of VCB panels inside and outside with approved color including lettering details all as per existing and checking the IR value before testing and commissioning the bus bar all as specified . Note :- Test sheet of IR value shall be submitted by the contractor, no cost extra shall be paid by the department and all testing requirement shall be arrange by the contractor including transportation and T&P. |
| 46 | Material and labour for Strip Opening the busbar of the HT 3 Nos HT 33 KV VCB panels for decarbonising of busbar and connected items/removing the old teared/ unsv insulation from the bus bar, checking the IR value before fixing the HT sleeve and refixing the heat shrinkable insulating tape and sleeve suitable for 33 kv busbar and HT insulation tape for CT/ PT connection complete painting of VCB panels inside and outside with approved color including lettering details all as per existing and checking the IR value before testing and commissioning the bus bar all as specified . Note :- Test sheet of IR value shall be submitted by the contractor, no cost extra shall be paid by the department and all testing requirement shall be arrange by the contractor including transportation and T&P. |
| 47 | Supply and fix in replacement & testing and commissioning of CTs epoxy cast wound primary with minimum primary current 60 to 400 A, single/ double ratio, double core (Protection core-5P10 & Metering core- Class 1.0), 25 KA for 1 sec of 15 VA minimum Burden including necessary fixing arrangement to match with the existing system complete all as directed Make - as per OEM HT panel manufacturers.. |
| 48 | Supply & laying 1.5 sqmm flexible PVC stranded copper conductor cable, unsheathed, 1100 V grade for control wiring. |
| 49 | Supply & laying 2.5 sqmm flexible PVC stranded copper conductor cable, unsheathed, 1100 V grade for control wiring. |
| 50 | S& Fixing in replacement of space heater with thermostat and new connected separate control with wiring |
| 51 | Disconnect and taking out the IDMT/ Numerical/ Microprocessor based relay of any type of any Make-(3 Phase + EF) over current IDMT with instant trip, Separate curve selection for phase and EF from Latching of fault current up to last 5 faults with time stamping. Inbuilt Trip circuit supervision function (TCS).Inbuilt Breaker Failure function (50BF).Programmable Annunciation contacts. Site selectable CT secondary i.e. 1A/5ASelf Supervision of relay. Metering function. Fully communicable with IEC standard open protocol IEC60870-5-103.Aux.V-24-240AC/DC11 KV HT panel, cleaning the contacts, calibrating the relay by conducting secondary injection tests, checking of current transformer, rectification of defects in control wiring for proper tripping of circuit breakers through CTs and relay and tripping coils, adjustment/setting to plug and time multiplier settings of the relay to achieve the discrimination in tripping, tune/synchronies upstream breaker relay settings, re-installation of relay, & commissioning etc complete all as specified and as directed. Please Enable Macros to View BoQ information |
| 52 | Disconnect and taking out the IDMT/ Numerical/ Microprocessor based relay of any type of any Make-(3 Phase + EF) over current IDMT with instant trip, Separate curve selection for phase and EF from Latching of fault current up to last 5 faults with time stamping. Inbuilt Trip circuit supervision function (TCS).Inbuilt Breaker Failure function (50BF).Programmable Annunciation contacts. Site selectable CT secondary i.e. 1A/5ASelf Supervision of relay. Metering function. Fully communicable with IEC standard open protocol IEC60870-5-103.Aux.V-24-240AC/DC11 KV HT panel, cleaning the contacts, calibrating the relay by conducting secondary injection tests, checking of current transformer, rectification of defects in control wiring for proper tripping of circuit breakers through CTs and relay and tripping coils, adjustment/setting to plug and time multiplier settings of the relay to achieve the discrimination in tripping, tune/synchronies upstream breaker relay settings, re-installation of relay, & commissioning etc complete all as specified and as directed. Please Enable Macros to View BoQ information |
