Controlling via a device for magnetic compensation of repulsion forces and contactor comprising such a device

摘要

The device i.e. magnetic compensator (30), has a magnetic piece (32) functionally coupled to a contact bridge (18) of a movable contact (16). A measuring unit (40) measures a magnitude representative of current flowing between the movable contact and a fixed contact (14). A processing unit (42) processes the magnitude representative of the current for comparison to a threshold. A control unit (44) controls supply units of a coil (22) according to the result of the processing unit to increase the current supplied to the coil when the current flowing between the contacts exceeds the threshold. An independent claim is also included for an electrical apparatus including a supply unit provided with an interrupter for disconnecting one of windings.