switchgear 1. Ambient temperature: -15 ~40 ; daily average: 35 ; 2. Altitude: 1000m 3. Relative humidity:daliy average: 95%,m switchgearKGN8-12 fixed metal-clad switchgear (short for KGN8 switchg ear as below) applies to below 12kV, 3 phase AC 50/60Hz power system. It can be widely used for electric force, metallurgy, petrifaction and urban construction.