| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To surely and easily detect the occurrence of a failure in a stopper diode apparatus for supplying a frost formation removing current to an overhead wire when frost formation is removed from the overhead wire, and achieve a sure and stable operation when a frost formation removing zone has a long distance and the zone is extended. <P>SOLUTION: The stopper diode 12, an iron core 13 and a coil 14 are built in a fixed section 11. A permanent magnet 20 and a short conductor 21 for connecting the coil and stopper diode are built in a movable section 19. The movable section is attached to the fixed section by a suction force of the permanent magnet during a normal operation (a), and attached to the fixed section by a suction force between the permanent magnet and the iron core during an operation of a train (b). The stopper diode and the coil are separated in a circuit, and the failure of the stopper diode is detected and indicated by protruding the movable section from the fixed section using a reaction force between an electromagnet and the permanent magnet when the stopper diode is failed by a short circuit during the frost formation removing current is supplied to the overhead wire (c). <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
