Patent ID: 8569645

Claim:
A magnetic actuator circuit for high-voltage switchgear for a vacuum circuit breaker, comprising: at least one permanent magnet and at least one coil connected in series with a transistor switch that receives, on a control terminal, a first control signal that puts the transistor switch in a closed state or an open state; a first electromechanical switch connected in series with the transistor switch and coil, the first electromechanical switch being arranged to receive, on a control terminal, a second control signal that puts the first electromechanical switch into a closed or an open state, the first electromechanical switch and the transistor switch having a default state that is an open state, so that the second control signal: a) puts the electromechanical switch in a closed state at an instant prior to application of the first control signal that puts the transistor switch in its closed state; and b) returns the electromechanical switch to its open state once the transistor switch has been returned to its open state.