KYN281-12(Z) Metal-clad Removable AC Metal-enclosed Switchgear (hereinafter referred to as switchgear) is a power distribution device that rated voltage 3.6~12V, three-phase AC 50Hz single busbar and busbar section system. It is mainly used in the power plant, small and middle scale generator, industrial and mineral enterprise, substation and large-scale high-voltage motor to control, protect and inspect. The switchgear is in conformity with the standards GB3906, IEC298. There is five-protection interlocking function, such as preventing the overload from pulling or pushing the breaker handle, preventing from the mistaken closing or opening the breaker, preventing the earthing switch from closing or opening the breaker at the closing position, preventing from entering the live compartment and preventing the earthing switch from mistakenly closing when it is live. The performance of the power distribution unit is advantageous and the vacuum breaker could be chosen from ZN63□-12 type that is developed by our company or the VD4 type made by ABB Co.