Vd4 vacuum circuit breaker is an indoor switchgear component insulated by air. Circuit breakers meet the requirements of gb1984,dl/t403, German dinvde0670, iec60056 and 60694 standards. Under normal operation conditions or fault conditions (especially short circuit conditions), circuit breakers can ensure safe and reliable operation and operation as long as they are in the range of technical parameters. Vd4 vacuum circuit breaker can operate frequently or break short circuit current many times in the range of working current. VD4 vacuum circuit breaker is suitable for reclosing operation and has very high operation reliability and service life. Vd4 vacuum circuit breaker adopts vertical insulation sleeve to defend against various climatic effects; and in the aspect of maintenance and maintenance, it is usually only necessary to clean or lubricate the operating mechanism. The installation form of vd4 vacuum circuit breaker in switchgear can be either fixed or removable, and can also be installed on the frame.