Products Features& Applicable scope:  
The Gas Insulated Metal Enclosed Switchgear (GIS) is a complete set of switchgear, which has circuit breaker, disconnector, earthing switch, current transformer, potential transformer, surge arrestor, busbar, ingoing and outgoing bushing or cable terminal all enclosed on a grounded metal tank and is filed with FS6 gas of specific pressure as the insukation medium. This product is applicable to three-phase, 50HZ, AC electric power system with the rated voltage of 72.5-252KV.  Comply with IEC62271-203 "Gas insulated Metal Enclosed Switchgear for Rated Voltage of 50kV and Above".