The KYN28A-12Z indoor metal-clad draw-out switchgear, made in Anhui Xinlong Electrical company is a assembled electrical power distributing equipment for AC.6~12Kv,3 phases,50Hz,signal or double busbar system, mainly used in power distributing system of electrical power plants,power transmitting work-net,industries and secondary substations as receiving and distributing equipment or as a controlling,protecting or supervising equipment of starting H. voltage motors, and so on.The switchgear meets with IEC298, GB3906 standards, having many features that preventing circuit breaker break from being pulled out with load.preventing the circuit breaker from being Mal-operated by close or open,preventing persons from entering into live chambers and preventing earthing switch from being closed when main breaker is closed.The switchgear is equipped with VA1 vacuum breaker or VS1、VA vacuum circuit breaker of Schneider CO.,Ltd. or VD4 vacuum breaker of ABB company as main breaker.The switchgear is a electrical distributing equipment with reliable and higher electrical performance.