KYN28-12 withdrawout AC metal-enclosed high voltage switch cabinet, is 3.6-12 kv three-phase ac fifty hz single busbar and single bus section system or double busbar system complete set of power distribution unit. Mainly used for power station service power, power transmission and transformation system of substation by distribution, industrial and mining enterprises, institutions, such as distribution situation under control, protection, detection. Can be used to control the high frequent start motor, etc.