Switchgear KYN28A-12(24)Armored Withdrawable AC Metal-Enclosed Switchgear The KYN28A-12(24) type (GZS1) indoor armored withdrawable AC metal-enclosed switchgear (hereinafter referred to as the switchgear) is a three-phase AC 50Hz complete set of indoor distribution equipment designed to receive and distribute network electrical energy at 3-12KV. It is used for controlling, protecting, and monitoring circuits. Various types of microcomputer-based comprehensive relay protection devices can be installed on the relay compartment panel of this product, enabling intelligent control of the system. It has remote control, remote measurement, remote signaling, and remote adjustment functions, controlled through a field network with a CAN bus communication interface. The switchgear features "five prevention" functions, including preventing misoperation of the circuit breaker, preventing the handcart from being pushed or pulled with a load, preventing the grounded switch from closing when energized, preventing the grounded switch from supplying power in the grounded position, and preventing accidental entry into the live interval. The cabinet can be equipped with both VS1 (ZN63), ZN12V vacuum circuit breakers, and imported VD4 vacuum circuit breakers with VC series vacuum contactors.