SENSOR FOR GROUND FAULT INTERRUPTER APPARATUS

摘要

Sensor apparatus for a ground fault interrupter operative to open or interrupt an electric circuit in response to the occurrence of a ground fault therealong. The sensor apparatus is operative to detect differences in the mangitudes of the currents respectively flowing in the entrance and return paths of an electric power circuit having at least a pair of conductors providing such paths; and it includes magnetic and electrostatic shield structure adapted to pass such conductors therethrough to form the primary winding of a differential transformer, and it further includes a transformer core coaxially related to the shield structure and equipped with a secondary winding to define a differential transformer in conjunction with the power conductors.