| 摘要 |
In a method for disconnecting a switching contact from a mating contact in a switch which switches alternating current, a short mechanical pulse is applied to the switch with a pulse direction for disconnecting the contacts with a phase angle of approximately 13° before a next or a following zero crossing of the current. To this end, a piezoactuator is provided on the mating contact. Said piezoactuator can also measure the applied contact force, so that the pulse is triggered, in addition to said phase angle, only at a very low contact force which tends towards zero.
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