MVXO-12 series outdoor high-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is an outdoor power distribution equipment with a rated voltage of 12kV, three-phase AC 50Hz. It uses vacuum arc extinguishing and SF6 gas as the insulating medium, and is an improved product of the MVXOZ-12 column-mounted vacuum circuit breaker. The cabinet adopts the gas sealing, explosion-proof, and insulating structure technology introduced from Toshiba Corporation of Japan VSP5. The sealing performance of the inlet and outlet ducts has also been improved. The overall sealing performance is excellent. The SF6 gas filled inside does not leak and is not affected by the external environment; Its spring operating mechanism has been miniaturized in design and optimized for feasibility and stability. It adopts a direct-acting chain main drive and a multi-stage tripping system. Its action reliability and stability are several times higher than that of traditional domestic spring operating mechanisms; the main circuit The contact between the shaft and the sleeve adopts an inward and outward expansion chain structure. The contact resistance of the main circuit is small and the temperature rise is low. Therefore, the MVXOZ-12 outdoor vacuum circuit breaker is a maintenance-free product and is an excellent product for pole-mounted circuit breaker.

MVXO-12 also adds over-current protection, mechanism spring energy storage indication, and is equipped with an aviation socket for secondary electrical connection to facilitate integration with intelligent controllers.

Excellent electrical and mechanical properties make the MVXOZ-12 outdoor pole-mounted vacuum circuit breaker widely used. It is mainly used to break and close the load current and short-circuit current of the 10kV power system. It is suitable for protection and control in substations and industrial and mining enterprise power distribution systems, and is more suitable for places with frequent power grid operations. This product is matched with the controller and has excellent recloser function, which can meet the requirements of distribution automation system.