| 摘要 |
A circuit interrupter is disclosed which provides for tripping of a line lead on occurrence of a loss of neutral or an earth leakage fault without the need for an earth connection. The circuit interrupter includes a circuit breaker which is activated by discharge of a capacitor in a closed loop, the capacitor being connected across the output of a D.C. power supply. A loss of neutral fault is detected as the potential of a neutral lead rises through a pull-up resistor and tripping will occur before the neutral rises to a potential at which the power supply becomes inoperative.
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