Electromagnetic actuator arrangement

Details Electromagnetic actuator arrangement Electromagnetic actuator arrangement

H - Electricity

02

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H02H 3/00 (2006.01) H01H 71/24 (2006.01) H01H 83/14 (2006.01) H01H 47/02 (2006.01)

Patent

CA 2018965

ABSTRACT Electromagnetic Actuator Arrangement A residual current circuit breaker comprising a switch (SW1) biased open by a biasing spring (SP) and operated by a yoke (Y1) which attracts an armature (AR1) when its winding (L1) is energised is provided with means (C1, SCR1) for instantaneously reversing the magnetising force acting on the armature when the winding (L1) is de-energised in response to the detection of a fault current. As a result, the residual magnetism in the armature (AR1) is opposed by the reversed magnetic field from the winding (L1) and the tendency of the armature to stick to the yoke is avoided. Consequently, the tripping time is reduced.

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