| 摘要 |
PURPOSE:To eliminate a lead from an intermediate potential point of a main battery for driving an electric motor vehicle by lighting a leakage display lamp by a current form a sub-battery for electric units at the time of a leakage of a (+) side electric circuit of the main battery and lighting the lamp by a current from the main battery at the time of a ground leakage of a (-) side electric circuit. CONSTITUTION:When a short-circuiting point occurs at a point A of a (+) side feeder 1A of a main battery 1, a closed loop current 1a flows in a circuit of a (+) connection terminal of a sub-battery 7, a resistor 6, a light emitting diode 5, a diode 4, a resistor 3, a switch 2, the feeder 1A, the point A, a vehicle body and a (-) connection terminal of the battery 7. Accordingly, the short- circuit of the feeder 1A is detected by light emission of the diode 5. On the other hand, when a shortcircuiting point occurs at a feeder 1B, a current flows in a circuit of the feeder 1A, the switch 2, a resistor 8, a diode 9, a light emitting diode 10, the resistor 6, the (+), (-) connection terminals of the battery 7 and the feeder 1B, and the short-circuit of the feeder 1B is detected by light emission of the diode 10. |
