| 摘要 |
A ground fault detector providing protection from leakage current to ground by sensing unbalance in supply and neutral conductor currents to actuate a circuit breaker. A solid state circuit including amplifier and detector and having the unbalance signal of a current transformer as an input for energizing a trip coil of the breaker when the unbalance current exceeds a predetermined level. Improved circuitry providing temperature compensation, insensitivity to turn on and other transients and noise, and protection against overheating due to breaker hang-up.
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