The working principle of a vacuum circuit breaker is based on a vacuum arc extinguishing chamber. When the moving and stationary contacts are opened by the operating mechanism, an arc is generated between the contacts. The surface of the contact emits steam at high temperatures. Due to the special shape of the contact, a magnetic field is generated when current passes through it. The arc moves rapidly along the tangent direction of the contact surface under the action of the magnetic field, and finally extinguishes at natural zero crossing. The dielectric strength between the contacts will quickly recover . Characteristic: 1.Small size and light weight: The vacuum circuit breaker is designed to be compact and suitable for use in limited spaces. 2.Suitable for frequent operation: Due to its structural characteristics, vacuum circuit breakers are suitable for frequent operation with low maintenance workload. 3.No maintenance required: The arc extinguishing process of vacuum circuit breakers does not require maintenance, reducing maintenance costs. 4.High insulation strength: The vacuum environment provides high insulation strength, suitable for high-voltage electronic equipment systems. Application Area Vacuum circuit breakers are widely used in industrial and mining enterprises, power plants, and substations, especially in places that require oil-free, low maintenance, and frequent operation. They can be configured in central cabinets, double-layer cabinets, and fixed cabinets for controlling and protecting high-voltage electrical equipment.