Kyn28a-12 type indoor metal armored medium mounted switchgear is a three-phase ac 50Hz, rated voltage 12KV, working current up to 4000A complete set of indoor power distribution device. It is suitable for power plants, substations, industrial and mining enterprises, etc. to receive and distribute electric energy, to control, protect and monitor the circuit, and to be used in frequently operated places.

Products by the cabinet put oneself in another's position and spare parts (handcart) in two parts, the cabinet put oneself in another's position structure adopt aluminized zinc plate or galvanized sheet, using metal clapboard space for circuit breaker room (handcart room), main bus-bar chamber, cable chamber and relay control room, and all metal construction are reliable grounding, the primary loop system of each compartment has independent pressure release channel.