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Ground fault detection circuit

  • US 9,541,593 B2
  • Filed: 02/21/2014
  • Issued: 01/10/2017
  • Est. Priority Date: 02/22/2013
  • Status: Expired due to Fees
First Claim
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1. A ground fault detection circuit comprising:

  • a fuse; and

    a fuse detect circuit coupled in parallel with the fuse, the fuse detect circuit including an isolated DC or AC source arranged to inject a sensing current into the fuse and detection means arranged to detect the sensing current that was injected into the fuse and that has passed through the fuse or a signal indicative thereof;

    the fuse and the fuse detect circuit being arranged to be coupled between a reference point and a second point of a monitored circuit for which ground faults are to be detected;

    wherein the fuse detect circuit is further arranged to;

    detect a fuse break indicative of a ground fault condition; and

    disable at least a portion of the monitored circuit.

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