The HXGN-12ZF(R)box-type fixed metal-enclosed switchgear (referred to as ringmain unit)is suitable for 10kV AC networks with a frequency of 50Hz,used forbreaking load current,short-circuit current,and making short-circuit current.This ringmain unit is equipped with manual and electric spring mechanisms to operate the loadswitch,earthing switch,and isolation switch,which are manually operated.The unit hasstrong completeness,a compact size,and no risk of fire or explosion,and it featuresreliable "five-proof"functions.