| 摘要 |
PURPOSE:To protect feeder lines from burning and to prevent malfunction of load by arranging a current interrupting member is series with the earth terminals of feeder line group to be connected with rails. CONSTITUTION:Upon fault of a power source, i.e. a voltage converter 6A, for a feeder line group A, a current interrupter 7 is closed to supply power from a voltage converter 6B to the feeder line group A. At this time, current from the rail 9 side is interrupted by a current interrupting means 11B and does not flow to the feeder line group A. Consequently, burning of the feeder line due to the current flowing in from the rail 9 side is prevented as well as variation of the earth current. |
