35KV Indoor Vacuum Circuit Breaker ZN85-40.5T/630AUsed in a three-phase AC power system with a rated voltage of 40.5kV and a frequency of 50Hz, this product is primarily used to interrupt and connect the load current, overload current, and short-circuit current of rural, urban, and small-scale power systems. The overall structure is a three-phase common box design, with the three-phase vacuum interrupters housed within a metal box. It utilizes SMC insulating material for phase-to-phase and phase-to-ground insulation, offering high insulation strength. The circuit breaker can be equipped with isolation switches or surge flow delay protectors according to customer requirements. It can be operated manually or electrically with the option for wireless remote control. The vacuum interrupter employs fixed-sealing technology, featuring a small size, long lifespan, high reliability, and an exposed shielding cover. Encapsulated in epoxy resin, it has excellent weather resistance and is easy to transport. The operating mechanism uses highly reliable dual-stable permanent magnet technology, with a simple structure and no need for maintenance. The mechanical lifespan can reach 30,000 operations. Epoxy resin encapsulation; meets environmental protection requirements; verified outdoor performance; ozone and UV-resistant; sturdy, lightweight, and not easily broken; permanent magnet mechanism; few moving parts; no maintenance required; utilizes dual-stable permanent magnet technology.