KYN28A-12(Z) series armored removable AC metal-enclosed switchgear is suitable for three-phase AC 50Hz power system. It is used to control, protect and monitor circuits for receiving and distributing electrical energy wells. the newly introduced and developed high-current, high-breaking switchgear can also be used alone as a high-voltage generator outlet. KN28A- -212Z1 (G2Z51) switchgear can be equipped with intelligent measurement and control protection device; it can be equipped with 6-point or 9-point online temperature measurement technology; it can realize remote control electric operation grounding switch, electric rocking in and out circuit breaker handcart and cabinet Internal fault arc protection, etc. To realize intelligent control of switchgear. On the basis of the prototype KYN28A-121Z1IGZ51) switchgear, our company independently developed the KN28A-12[ZINB) switchgear, which is small in size and full in function, suitable for use in a compact environment.