SPECIAL REPAIR/REPLACEMENT OF HT EQUIPMENTS VCBS,TRANSFORMER,HT PANEL ETC AGAINST BER UNDER GE(NW) NOFRA, COLABA, MUMBAI

Dismantling/ taking down carefully unserviceable/ outlived BER Transformers from various sub stations at NOFRA and transported to AGE E/M Store yard safely complete all as specified and as directed by Engneer-in-Charge.

Dismantling/ taking down carefully unserviceable/ outlived BER HT Switch Gear from various sub stations and transported to AGE E/M Store yard safely complete all as specified and as directed by Engneer-in-Charge.

Supply , install, testing and commissioning of indoor type vacuum circuit breaker independent Panel Switch board (1 incomer & 2 Outgoings) with posibility of future extension at either one side of panel board, capacity 11 KV, 800 Amp, 3 Phase, 3 wire, 50 Hz, having a rupturing capacity of 350 MVA at 11 KV , 25 KA breaking capacity for 3 sec, Internal arc type tested for 25KA for 1 sec with AFLR clasification, totally enclosed with extended copper bus bar of 800 Amps for each phase, floor mounting, metal clad, Indoor extensible type, flush front, Horizontal isolation, Horizontal drawout type with Electrical and Mechanical interlock and automatic safety shutter gear including padlocking arrangement, isolation plugs, assambly of 3 vaccum interrupters (Should be VCB manufacturer's own make), with each pole individually encapsulated by epoxy insulations and self - aligning finger type isolating contacts, truck having integral racking with necessary interlocks (for insertion and removing of VCB), manual and automatic motor charged independent closing/ tripping spring , trip free operating mechanism with closing and tripping push buttons and mechanical breaker ,interconnected with OEM's own factory made (system house not allowed), Full voltage heat shrinkable 11KV sleeve (PVC sleeve not accepted) insulated electrolytic copper bus bar of 800 Amps and all protection, indication, Operation, monitoring and control and accessories as per the specification for each VCB. Resin Cast Wound type CT Ratio : 200-100A/ 5-5 A, Core1: 5P20, 10 VA; Core 2: 0.5, 7.5 VA for incoming and 100-50A/5-5A core 1-5P10, 10VA, core 2-0.5, 7.5 VA for outgoing VCB's(2Nos) VT Ratio: 11KV/1.732/110V/1.732/110V/1.732, -Core 1: 1.0, 100VA for incoming VCB. IEC 61850 , HSR-PRP complient Numerical relay having protections of 50,51, 50N,51N, 67RYBN, 50LBB, 27, 59 etc for each VCB(1No incoming and 2 Nos out going) M & L for Digital type ammeter with selector switch for 1 No incoming & 02 Nos outgoing VCB and Digital type voltmeter with selector switch for incoming VCB. Multifunction Meter of ACC Class 0.5, having facility to see KW, KVA, KVAR, PF, KWH, KVARH, KVAH, A,V etc.10 window Annunciation with hooter for incoming & 02 Nos outgoing VCB. Master trip relay and trip circuit supervision relay for incoming & 02 Nos outgoing VCB, LR & TNC switch, space heaters with thermostat, DC fail relay for each VCB.01 Incomer + 2Nos Outgoings ). Power Pack 230 V AC / 110V DC 30 min battery back up for each VCB (01No incomer and 2Nos out going VCB's) Note :- (a) 240 volts SP power supply required for operation of VCB operating mechanism motor and other controls shall be provided from the existing power point with 2.5 sqmm, 3 core PVC insulated round flexible multi stranded copper conductor cable 1100 volt grade and unit rate quoted shall deemed to be included the cost of the same. (b) Setting of the relay will be done by rep of OEM only in presence of Engineer-in-Charge.

Supply, installation, testing and commissioning of Transformer double wound, step down, 11000/433 volts, oil type, minimum 500 KVA capacity indoor type or next nearest higher capacity as per OEM design, conforming to conforming to Energy Efficency Level -II of IS Code 1180 (part-I) including amendment No 04 March 2021, 5 star rating , ONAN, Dyn 11, core type with copper conductor.Transformer shall be provided with Off circuit Rotary type tap switch so as to provided for a voltage adjustment on H.V, from +5% to -5% (in step of 2.5%) of rated voltage of 11000 volts in 4 equal steps (5 position) to obtain rated voltage of 433 volts on LV side including cable box on LT and HT side, with 12 KV system highest voltage at HV side, 28 KV (rms) HV power frequency, 75 kVp HV impulse withstand voltage, trasnformer shall be designed for losses as per IS Code 1180 (part-I) including amendment No 04 March 2021 and for 110% continuous overfluxing withstand capaibility, complete with first fill of new transformer oil having dielectric strength not less than 60 KV, suitable mounting arrangement as per manufacturers specifications complete and other standard accesssories as under : (a) 12kV off circuit tapping switch. b) Oil conservator tank with drain plug and filling cap. c) Silica gel dehydrating breather charged with silica gel . d) Oil level gauge. e) Oil filter valve. f) Oil drain valve. g) Thermometer pocket (with oil temp. indicator) h) Diagram and rating plate. j) Two earthing arrangements k) Lifting lugs. l) Four bidirectional plain roller m) Air vent plug. n) Explosion vent. o) Cable box on H.V side. p) Cable box on L.V side. q) Additional neutral terminal brought outside the LV cable box for earthing. r) HV&LV cable boxes. s) Radiator valves. t) Oil temp. indicator. u) Winding temp. indicator v) Magnetic oil level gauge. w) Inspection Cover. x) marshalling box etc complete all as specified and directed by the Engr-in-charge

Supply, installation, testing and commissioning of Transformer double wound, step down, 11000/433 volts, oil type, minimum 400 KVA capacity indoor type or next nearest higher capacity as per OEM design, conforming to conforming to Energy Efficency Level -II of IS Code 1180 (part-I) including amendment No 04 March 2021, 5 star rating , ONAN, Dyn 11, core type with copper conductor.Transformer shall be provided with Off circuit Rotary type tap switch so as to provided for a voltage adjustment on H.V, from +5% to -5% (in step of 2.5%) of rated voltage of 11000 volts in 4 equal steps (5 position) to obtain rated voltage of 433 volts on LV side including cable box on LT and HT side, with 12 KV system highest voltage at HV side, 28 KV (rms) HV power frequency, 75 kVp HV impulse withstand voltage, trasnformer shall be designed for losses as per IS Code 1180 (part-I) including amendment No 04 March 2021 and for 110% continuous overfluxing withstand capaibility, complete with first fill of new transformer oil having dielectric strength not less than 60 KV, suitable mounting arrangement as per manufacturers specifications complete and other standard accesssories : (a) 12kV off circuit tapping switch. b) Oil conservator tank with drain plug and filling cap. c) Silica gel dehydrating breather charged with silica gel d) Oil level gauge. e) Oil filter valve. f) Oil drain valve. g) Thermometer pocket (with oil temp. indicator) h) Diagram and rating plate. j) Two earthing arrangements.k) Lifting lugs. l) Four bidirectional plain roller m) Air vent plug. n) Explosion vent. o) Cable box on H.V side. p) Cable box on L.V side. q) Additional neutral terminal brought outside the LV cable box for earthing. r) HV&LV cable boxes. s) Radiator valves. t) Oil temp. indicator. u) Winding temp. indicator v) Magnetic oil level gauge. w) Inspection Cover. x) marshalling box. complete all as complete all as specified and directed by the Engr-in-charge

Supply, installation, testing and commissioning of Transformer double wound, step down, 11000/433 volts, oil type, minimum 250 KVA capacity indoor type or next nearest higher capacity as per OEM design, conforming to conforming to Energy Efficency Level -II of IS Code 1180 (part-I) including amendment No 04 March 2021, ONAN, Dyn 11, core type with copper conductor.Transformer shall be provided with Off circuit Rotary type tap switch so as to provided for a voltage adjustment on H.V, from +5% to -5% (in step of 2.5%) of rated voltage of 11000 volts in 4 equal steps (5 position) to obtain rated voltage of 433 volts on LV side including cable box on LT and HT side, with 12 KV system highest voltage at HV side, 28 KV (rms) HV power frequency, 75 kVp HV impulse withstand voltage, transformer shall be designed for losses as per IS Code 1180 (part-I) including amendment No 04 March 2021 and for 110% continuous overfluxing withstand capaibility, complete with first fill of new transformer oil having dielectric strength not less than 60 KV, suitable mounting arrangement complete and other standard accesssories : (a) 12kV off circuit tapping switch. b) Oil conservator tank with drain plug and filling cap. c) Silica gel dehydrating breather charged with silica gel d) Oil level gauge. e) Oil filter valve. f) Oil drain valve. g) Thermometer pocket (with oil temp. indicator) h) Diagram and rating plate. j) Two earthing arrangements.k) Lifting lugs. l) Four bidirectional plain roller m) Air vent plug. n) Explosion vent. o) Cable box on H.V side. p) Cable box on L.V side. q) Additional neutral terminal brought outside the LV cable box for earthing. r) HV&LV cable boxes.s) Radiator valves. t) Oil temp. indicator. u) Winding temp. indicator v) Magnetic oil level gauge. w) Inspection Cover. x) marshalling box. complete all as specified and directed by the Engr-in-charge

Excavating in trenches n exc 1.5m wide & n exc 1.5m in depth; for foundation, etc. or for manholes n.exc.10 Sqm on plan and n.exc.1.5m in depth and getting out in soft/loose soil complete all as specified.

Returning filling in , including spreading, leveling, watering and well ramming in layers not exc 25 cm with soft/ loose soil.

Removing excavated material n.exc 50 m and depositing where directed at a level n.exc 1.5 m above the starting point.

Supply and laying un-reinforced precast concrete cable cover, Class LV, type -I, flat size 250 x 150 x 40 mm laid in trenches complete all as specified and directed.