| 摘要 |
A ground fault circuit interrupter (1) is described which provides protection in the event of loss of neutral (3) or ground (4), excess potential between neutral and ground and reversed input connections. Sep arate, independent tripping circuits are used for these latter faults and for ground faults, thus eliminating problems due to inte rfering signals and reducing reliance on any one or group of components. An opto-emitter (25) and opto-detector (30) arrangement is used for detecting and causing tripping of a circuit breaker (6) in the event of faults other than ground fault s.
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