Patent ID: 7259944
Filing Date: 2007-08-21
Classification: H01H

Abstract:
1. A method for operation of a switching device having a switching chamber, at least one main current path and an associated auxiliary current path, wherein the switching device includes a quenching device for an arc and a PTC limiter, adapted to switch from a non-current-limiting mode to a current-limiting mode and adapted to form a switching voltage when there is a high current load, comprising: resetting the PTC limiter if the arc commutates back from the auxiliary current path to the main current path, whereby the current in the auxiliary current path decreases to a low value or to zero; and resetting the PTC limiter from the current-limiting mode to the non-current-limiting mode in a time period of <1 ms, after the current in the auxiliary current path decreases to a low value or to zero.