Product Overview ZN63-24 type indoor high-voltage AC Vacuum Circuit Breaker is an indoor switchgear with a rated voltage of 24KV and three-phase AC 50Hz, which is suitable for control or protection switching of power plants, substations and industrial and mining enterprises and other transmission and distribution systems, especially for breaking main loads and frequent operation in high-altitude areas and can be a protection and control unit for power equipment of the power grid system and industrial and mining companies, it is especially suitable for the place of frequent requiring operation or multiple short-circuit current breaking due to the particular superiority of vacuum circuit breaker.