| 摘要 |
A line protection electromagnetic actuator, comprising several windings surrounding a movable magnetic core capable of moving from a rest position to an actuating position under the effect of the magnetic field created by the windings, and comprising: - a differential winding (2) generating a magnetic field in response to a differential fault on the current line to be protected; - a magnetic winding (1), engaged with the differential winding (2), and generating a magnetic field in response to a short-circuit fault on the current line to be protected. This electromagnetic actuator is characterised in that it also comprises a third winding (3) wound in a short circuit and engaged with said differential winding (2) and magnetic winding (1), generating a magnetic field opposed to the magnetic field created by the magnetic winding (1). |
