GIS is a new kind of super -voltage and high-capacity SF6, gas-insulated metal-enclosed switchgear, digesting and absorbing GIS product of super-voltage technology from home and abroad, and combining many years of researching &developing experience and the latest research results. 
GIS is a complete apparatus which consists of circuit breaker, disconnector, earthing switch, current transformer, voltage transformer, lightening arrester, bus bar ,outgoing &incoming line bushings and cable terminals enclosed in earthing metal enclosure and filled SF6 as insulating and arc-distinguish medium.