HXGN port-12/24 series box-type fixed fully enclosed switchgear is a switchgear in three-phase AC 50Hz, rated voltage 12/24kV ring network power supply and distribution system, namely air-insulated ring cabinet, also known as vacuum ring cabinet. It is suitable for the power supply and distribution system of 10kV ring network, industrial and mining enterprises, high-rise buildings, residential districts, etc. The main switch adopts vacuum arc extinguishing, which has the advantages of strong interrupting ability and reliable performance, especially suitable for frequent operation mode.