1. The contact distance is small, the contact distance of 10KV vacuum circuit breaker is only about 10mm, the operating power of the operating mechanism is small, the stroke of the mechanical part is small, and the mechanical life is long.
2. The arcing time is short, and has nothing to do with the switch current, generally only half a cycle.
3. After the arc is extinguished, the recovery speed of the contact gap medium is fast, and the performance is better for breaking near-zone faults.
4. Due to the small amount of wear when the dredging is breaking the current, the electrical life of the contact is long, with full capacity breaking up to 30-50 times, rated current breaking up to more than 5000 times, low noise and suitable for frequent operation.
5. Small size and light weight.
6. It is suitable for breaking capacitive load current.
Because of its many advantages, it is widely used in substations. The current models mainly include: ZN12-10, ZN28A-10, ZN65A-12, ZN12A-12, VS1, ZN30, etc.