DH1(VS1)-12M Indoor High‑Voltage Vacuum Circuit Breaker

General Description

Model DH1(VS1)‑12M Permanent‑Magnet Indoor High‑Voltage Vacuum Circuit Breaker is indoor switchgear for three‑phase AC 50 Hz, 12 kV rated‑voltage power systems. It serves as protection and control units for power grid facilities and power equipment in industrial and mining enterprises. It is suitable for applications requiring frequent operations under rated operating current, or locations where short‑circuit currents need to be interrupted repeatedly.

This circuit breaker adopts an integrated design of operating mechanism and breaker main body. It can be used as a fixed‑mounted unit, or equipped with a dedicated propelling mechanism to form a withdrawable truck‑mounted unit.

Performance Advantages

This product is equipped with single‑/bi‑stable permanent‑magnet operating mechanism. Permanent magnets inside the mechanism provide holding force to keep the switch at closed or open positions. Compared with conventional spring‑type operating mechanisms, it greatly reduces the quantity of mechanical components and shortens the mechanical transmission chain, which significantly improves switch reliability and extends mechanical service life.