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ZN63 (VS1)-12 indoor high voltage vacuum circuit breaker (hereinafter referred to as circuit breaker) is a series of products independently developed by our company and has independent models. It can be used in industrial and mining enterprises, power plants and substations for the control and protection of electrical facilities, and can also be used in frequent operation sites. It has high reliability and mechanical life. Within the technical parameters of the circuit breaker and under normal use conditions, it can meet the various operations of the power grid under normal or accident conditions, including closing and breaking short circuit circuits. The VS1 series circuit breakers can be installed in the switchgear either as a fixed installation or as a pull-out handcart with a chassis car. Executive standards: GB1984-2003, IEC62271-100