Details: supply of sulfur hexafluoride (sf-6) gas in steel pressure cylinder for 420 kv, 245 kv & 145 kv sf-6 circuit breakers at 400 kv sub-station agra the specification of sf-6 gas shall be as follows :- sf-6 % by weight £ 99.9 air ppm by weight £ 500 cf4 ppm by weight £ 500 h2o ppm by weight £ 15 mineral ppm by weight £ 10 acidity in terms of hf ppm by weight £ 0.3 hydrolysable fluorides in terms of hf ppm by weight £ 1 sf-6 gas must comply with iec 376 specifications . note :- 1 empty sf-6 cylinders shall be provided by upptcl. 2. contractor shall provide authentic certificates / documents regarding sf-6 gas.
Sector: Transmission