SUPPLY, INSTALLATION, TESTING AND COMMISSIONING OF CENTER ROTATING DOUBLE BREAK TYPE ISOLATOR-33KV (1250AMP)AT THE WATER SUPPLY SCHEME DALBAND SRINAGAR

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S/I/T/C of 33KV ISOLATOR CENTER ROTATING, DOUBLE BREAK TYPE ISOLATOR -33KV (1250AMP) AS PER THE SPECIFICATION BELOW: • TYPE : 33KV (OUTDOOR) • MAIN SWITCH: DOUBLE BREAK, CENTRE POST ROTATING GANG OPERATED (MANUAL) • Applicable Standard: IS:9921/IEC-129/IEC62271-102 • No of Pole : 3 Pole Gang Operator • Rated Voltage Nominal/Maximum: 33/36KV • Rated Frequency 50 Hz -5% to +3% • System earthing : Solidly earthed • Temperature rise: As per relevant IS/IEC publication • Insulation level impulse with stand voltage a) Across Isolating distance: 195 kVpeak b) To earth & between poles: 170 kVpeak • 1-minute power frequency with stand voltage a) Across Isolating distance: 80 kVpeak b) To earth & between poles: 70 kVpeak • Rated current in Amp :1250 • Short time current for 3 sec: 25kA • Rated Peak withstand Current: 62.5KAp • Minimum creepage distance of support and Rotating insulator: 25mm/KV • Mounting structure: Upright on G.I structure • Material of Moving and Fixed Contact: Copper Silver Plated (min 25 microns) • Operating Rod Earthing with flexible copper braid of suitable length : 25X6 sqmm

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