SERIES-CONNECTED, SKIN-CURRENT HEATING PIPE INCLUDING CURRENT TROUBLE DETECTOR

摘要

SERIES-CONNECTED, SKIN-CURRENT HEATING PIPE INCLUDING CURRENT TROUBLE DETECTOR series-connected, skin-current heating pipe circuit comprises a ferromagnetic pipe and an insulated wire extending along and inside the ferromagnetic pipe, with one end connected to a single-phase a.c. source and the other end connected to each other. The circuit is characterized in provision of an impedance interposed between the other end of the pipe and of the wire, and a detector disposed in the proximity of the a.c. source to detect a current trouble when an insulation trouble occurs at any point throughout the entire length of the insulated wire.