SF6 Gas-insulated indoor switch disconnector (SFG), Rated voltage 12KV SFG is ... , including the earthing switch, are in robust epoxy resin housings filled with SF6 (1.45 bar). Safety: Made to highest IEC standards ... leak proof enclosure, inspection windows, integrated voltage indicator, interlocking device, gas gauge, etc. Economy: A life span of minimum 30 years ...