The VBG-40.5P series indoor high-voltage AC vacuum circuit breaker (hereinafter referred to as VBG) is an indoor switchgear component with a rated voltage of 40.5KV and below, and a three-phase AC 50Hz. The circuit breaker adopts a spring operated mechanism and integrated design with the circuit breaker body. The installation form inside the switchgear is withdrawable, and its basic structure and external dimensions are shown in Figure 1.

The product complies with relevant domestic and international standards such as GB, DL, IEC, etc., and its performance reaches the M2-E2 level.