Förfarande samt anordning för omkoppling av en elektrisk kopplare för växelström

摘要

In a method for switching an electric switching device (1) for alternating current arranged in a current path (2) between positions for breaking and closing the current path at a time considered to be an optimum for the conditions prevailing by achieving a relative movement of two contacts (30, 31-36) of an electric switching device arranged in the current path, the contacts are adapted to move a deterimed distance with respect to each other beforethe switching of the switching device is completed. Parameters useful for determining an optimum switching time are measured after the relative movement of the contacts for switching the switching device has been initiated and anre compared with values desired for these parameters at the time of the measurement with respect to obtaining a switching at an optimun time, and the relative movement of the contacts if controlled in dependence of the result of this comparison.