ELECTRICAL SWITCHING APPARATUS INCLUDING ALTERNATING CURRENT ELECTRONIC TRIP CIRCUIT WITH ARC FAULT DETECTION CIRCUIT

摘要

An electrical switching apparatus (1) includes a transductor circuit (100) that senses a direct current between at least one input terminal and at least one output terminal and outputs an alternating current proportional to the direct current between the input terminal and the output terminal. The electrical switching apparatus also includes a current sensor (130) configured to sense an alternating current component of the direct current. The electrical switching apparatus further includes an alternating current electronic trip circuit (200) including an arc fault detection circuit (210) configured to detect an arc fault based on the sensed alternating current component. The alternating current electronic trip circuit is also configured to control pairs of separable contacts (406) to trip open based on the alternating current output from the transductor circuit or the detected arc fault.