Patent ID: 9105417
Filing Date: 2015-08-11
Classification: H01H

Abstract:
1. A method of controlling the opening or the closing of an AC electric circuit in an electricity meter by using a relay, the method timing commands for activating the relay so that the actual command for activating the relay triggers actual action of the relay on the electric circuit at a time when an electrical parameter of said circuit reaches a value that is zero, so as to limit the formation of electric arcs in the relay, wherein the method comprises the following steps: requesting activation of the relay at a given initial moment (t collecting a stored inertial delay (di) of the relay between an actual order for activating the relay and the relay actually taking action on the electric circuit for determining said inertial delay (di), the stored inertial delay being determined by initial calibration of the relay and being checked and corrected by performing an activation without a time delay when the electricity meter is put into operation; measuring an electrical parameter of the electric circuit until a second moment (t imparting a time delay on the activation request until the actual order for activating the relay is issued so that actual action of the relay takes place at the second moment (t