Abstract: An over current protection system, the system includes: a sampling rate unit, adapted to determine a sampling rate of at least one alternating input current in response to an alternating input current cycle duration; and a controller, adapted to receive samples of the at least one alternating input current and to initiate an appliance of an over current protection measure if at least one of the following conditions is fulfilled: an amplitude of an alternating input current exceeds a first threshold before magnitudes of multiple alternating input current samples exceed a second threshold; and magnitudes of multiple alternating input current samples exceed a third threshold, wherein the third threshold exceeds the first and second thresholds.