High Pressure Equipment Set,type alternating-current metal-clad and metal-enclosed withdrawable switchear is a indoor complete set of power distribution unit of three-phase AV 50Hz and rated voltage of 40.5KV.Used for receiving and distributing the electric energy in power plants,transformer substations,mining and industrial enterprises,etc.it controls,protects and detects the circuits,also is applicable to frequent opetation lccations.This switchgear complies with GB/T11022-1999, GB/T3906-1991.