US Patent 7109602 Contactless power supply system and branch box used therefor

An arrangement comprising a magnetic body (12) having a hole portion (11) for passage of a primary-side first induction line (2), a primary-side second induction line (5) for electrically feeding a load in a contact less manner, an added line (17) passing through the hole portion (11) of the magnetic body, and 1th contact (19) for short-circuiting the added line 17. According to this arrangement, short-circuiting provided by the 1th contact (19) can cut off electric feeding to the primary-side second induction line (5), thereby isolating the load (second-side power receiving circuit) without mechanically switching the power supply line.