The BQVN-12GD series three-station indoor high-voltage vacuum circuit breaker has excellent electrical and mechanical properties, compact and stable structure, and is suitable for a variety of high-voltage power systems, especially in 6-12kV medium-voltage power grids to provide high-quality protection. The product design conforms to the trend of modern miniaturization, has high reliability, long life and low maintenance requirements, and is an ideal safety protection device in the power system.