FIELD: electricity.
SUBSTANCE: invention relates to the method 50 performed in a control unit 12 to open a contactor device 1. The contactor device 1 comprises a carrier 8 configured to move between a closed position, in which current is allowed to flow along the current path and an open position, in which the current path is open. The control unit 12 is configured to allow the carrier 8 to move between the closed position and the open position by turning on the power supply of the electromagnetic circuit winding 6. The method 50 comprises the steps of: initiating 51 the opening of the contactor device 1 by turning off the power of the winding 6. A power failure involves using a demagnetization circuit 40 comprising a discharge member 37. The discharge member 37 is configured to consume energy in the winding 6; the discharge element 37 is shunted 52 at the first time; and the power supply 53 of the winding 6 is re-enabled.
EFFECT: preventing the rebound effects and high shock load of the armature in the contactor.
18 cl, 8 dwg
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