CURRENT SENSOR FOR ELECTRIC WIRE

摘要

PROBLEM TO BE SOLVED: To confirm opened and closed conditions in a current sensor to determine whether correct defect inspection for an insulated electric wire is conducted or not. SOLUTION: A detection means for the opened and closed conditions for detecting a contact condition of magnetic cores is provided in the current sensor wherein the insulated electric wire in a hot-line condition is inserted into a closed magnetic path formed by bringing the two magnetic cores into contact, so as to detect a current flowing in the insulated electric wire based on a magnetic field of the closed magnetic path.