This combination switch consists of a dry-type combined metering transformer, a circuit breaker, and a high-voltage electric energy metering control box. It is suitable for distribution transformers with a rated frequency of 50Hz, a rated voltage of 10kV, a capacity of 6000kVA and below, and for electric energy metering and prepayment control in urban and rural outdoor power systems. The voltage transformer and current transformer are vacuum cast with epoxy resin, which has the advantages of arc resistance, UV resistance, and aging resistance. The surface of the transformer uses a creepage skirt to increase its creepage distance.

The circuit breaker adopts vacuum arc extinguishing technology, and can be equipped with a spring operating mechanism or a permanent magnet operating mechanism. This circuit breaker is suitable for rural power distribution systems, outdoor substation outlets, urban networks as section switches, and industrial and mining enterprises. The power distribution system is used for protection, control or frequent operation to open and close the load current, overload current and short-circuit current in the power system.