Indoor vacuum circuit breaker

Indoor vacuum circuit breaker(VCB) designed installed in the indoor medium voltage switchgear at the voltage rate of 11KV or 33KV. The indoor vacuum circuit breaker is applicated to protect and control the grid equipment and industrial enterprise power equipment. Particularly suitable for use in the number of operations on the rated voltage and current operations, or the number of places to open and close short circuit failures.

Because the insulating medium for arc extinguishing medium and contact gap after arc extinguishing is the vacuum, so this type of circuit breaker called vacuum circuit breaker. Indoor vacuum circuit breakers have dual functions of control and protection in the power system. It has the advantage of no explosion, small size, and high reliability, and it is one of the devices with the largest maintenance workload in the primary equipment of the power system.

The main performance parameter of the indoor vacuum circuit breaker is the vacuum degree of the vacuum interrupter. The level of the vacuum directly affects the withstand voltage level and the breaking capacity during the use of the vacuum switch.

The vacuum degree is mainly due to the manufacturing quality, transportation, installation, and operation process. The degree of vacuum in the arc chamber is of great importance in the engineering field.