The Permanent Magnet Vacuum Circuit Breaker (hereinafter referred to as the breaker) is an outdoor high-voltage switching device used in three-phase AC 50Hz networks with rated voltage of 7.2–12kV. Equipped with a permanent magnet operating mechanism and combined with an intelligent control terminal and PT (power transformer), it forms a complete intelligent circuit breaker. It is widely used in substation feeder terminals, industrial/mining distribution lines, and urban/rural transmission and distribution systems for protection and control, especially in locations requiring frequent operation and in automated urban/rural distribution networks.
Key Features
Vacuum arc extinguishing ensures reliable breaking performance, minimal contact wear, and maintenance-free operation
Epoxy resin composite external insulation provides excellent voltage withstand and weather resistance; oil-free and SF₆-free, environmentally friendly
Permanent magnet operating mechanism delivers a mechanical life of up to 30,000 operations and enables rapid fault isolation for fast protection
Optional integrated visible isolating blade with clear visible break and anti-misoperation interlocking device
Optional manual operating mechanism allows manual closing in emergency situations
Applicable Standard
GB/T 1984 High-voltage alternating-current circuit-breakers
