PROVISION OF EXTERNAL SUPPLY FOR INFRASTRUCTURE AT 7.426 ACRES LAND AT NAVAL STATION KOCHI

Supply, install, connecting up existing cables, testing and commissioning of HT 12 KV rated voltage and 11 KV operating voltage, 21 kA for 3 seconds, 3 phase 50 Hz,IP 54, SCADA compatible,motorised, two way Ring Main Unit (+CV+) comprising one number vacuum circuit breaker duly interlocked as Outgoing and one number motorised load break isolator as Incoming , battery chargers, totally enclosed metal clad switch gear with motorized 24 volt DC battery bank and charger, protection relays, having rated current of Ring Switch and Breaker is 630 Amp, both side extensible, with internal arc classification with AFLR with 21 kA for one second, copper bus bar with danger notice board, with factory made weather proof enclosure by the switchgear manufacturer and connecting existing cables to new RMU. The unit shall be painted in RAL7012/7035 paint shade with folowing specifications and all as per theIEC 60298,IEC 60265, IEC 60129,IEC 60420,IEC 60056,IEC 60694 and as per the specification of the manufacturer of Make : SIEMENS / ABB/SCHNEIDER.

(a) Ring Switch/Isolator (i) Capacity 11 KV, HT, 630 Amps. Triple pole, single break, having three position ('ON', 'OFF' and 'EARTH') Ring Main Switches, each with independent motor charged spring mechanism and fully rated earth switch. (ii) Air insulated cable boxes with gland plate suitable for bottom entry of single run of three core cable up to 300 sqmm. (iii) Cable Bushings (iv) Capacitive Voltage Indicator with LED Display. (v) Mimic diagram on front panel, complete with status indicators (ON-OFF-EARTH). (vi) Actuator Kit for motorised operation. (vii) One set of Potential Free contacts for SCADA Compatibility. (viii) Fault Passage Indicators (ix) One set of Right Angle Boots-NON TOUCH PROOF

(b) Vacuum Circuit Breaker : (i) Capacity 630 Amps, Triple pole, Vacuum Circuit Breaker, with independent motor charged spring mechanism and fully rated earth switch, with provision for earth of the cable. (ii) Air insulated cable box with gland plate suitable for bottom entry of single run of 3-core cable up to 300 sqmm. (iii) multi powered Over current, Earth Fault and short circuit three element numerical Relay with digital display(iv) Resin cast current transformers for protection mounted on Cable / cable box of ratio 60-30/1A, 5P10, 2.5VA. (v) Capacitive Voltage Indicators with LED Display. (vi) Mimic diagram on front panel, complete with status indicators (ON-OFF-EARTH). (vi) Motorised assembly. (vii) Epoxy Moulded low energy Tripping Coil for tripping the circuit breaker in fault condition. (viii) Right Angle Boots-NON TOUCH PROOF. (ix) Make of RMU and VCB need to be same.

(c) General spacifications : (i) One set of positive standard mechanical interlocks to avoid unsafe operations. (ii) Provision of pad locking for open, close, earth position in correct sequence. (iii) Mano meter for indicating SF6 gas pressure with green and red zone. (iv) Three mm thick stainless steel SF6 tank with robotically welded construction with IP67 protection. (v) External stud for earthing connections. (vi) SF6 Gas re filling provision. (vii) Extendable bushings for future extension with metallic end cap cover. (viii)Battery with charger (ix) Necessary foundation for RMU, weather protection roofing using galvolume sheet to be deemed in the quoted rate. Note:- Testing and Commissioning of RMU should be carried out by OEM rep at the site in presence of Engineer-in-charge.

Supply and laying in trenches, or fixing on walls or passing through cable duct / pipe XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured electric power cables (heavyduty Earthed Grade) with aluminium conductor, 11000 volts, grade having cross sectional area 3 core 185 sqmm, all as specified.

Supply and fixing of cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for XLPE armoured aluminium conductor cable of size 120 sqmm to 185 sqmm x 3 core all as specified. Make : 3M M-seal / Raychem / Denson / Cab Seal

Supply and fixing , cable straight through jointing kit for 11 KV (Earthed) grade cable, 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. Make : 3M M-seal / Raychem / Denson / Cab Seal

S&F cable route indicator over the HT cables made out of cast iron block of size 15x10 cm and thicknes 10 mm fixed with MS strip of size 32x4 mm upto length 75 mm and marked with 'MES HT Cable 185 /240 /300 Sqmm ' as required on cast iron block including necessary PCC and earth work etc complete including taking down old route indicators all as directed by the Engineer-in-charge.

Excavation in trenches not exceeding 1.5 metre wide and not exceeding 1.5 metre in depth and getting out in soft / loose soil for laying/removal/identifying the fault/relaying of cable etc all as specified and directed.

Returning , filling ,in including spreading, levelling, watering and well ramming in layers not exceeding 25 cm thick in soft / loose soil complete all as specified and directed.