Systems, devices, and methods for arc fault detection
First Claim
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1. A system comprising:
- an arc fault detection circuit comprising;
a first zero crossing analysis sub-system comprising a counter configured to determine, for a first waveform, a first count of dips that occur between a first sequential pair of predetermined zero crossings of a second waveform; and
a count analysis sub-system comprising a comparator configured to request a trip of an electrical device responsive to a determination that said first count of dips is greater than a first count threshold, but below a second count threshold.
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Abstract
Certain exemplary embodiments can include an arc fault detection circuit. The arc fault detection circuit can include a zero crossing analysis sub-system including a counter configured to determine, for a first waveform, a count of dips that occur between a pair of predetermined zero crossings of a second waveform. The second waveform can be obtained from an electrical circuit.
40 Citations
19 Claims
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1. A system comprising:
an arc fault detection circuit comprising; a first zero crossing analysis sub-system comprising a counter configured to determine, for a first waveform, a first count of dips that occur between a first sequential pair of predetermined zero crossings of a second waveform; and a count analysis sub-system comprising a comparator configured to request a trip of an electrical device responsive to a determination that said first count of dips is greater than a first count threshold, but below a second count threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method comprising:
producing an arc fault detection circuit comprising; a first zero crossing analysis sub-system comprising a counter configured to determine, for a first waveform, a first count of dips that occur between a first sequential pair of predetermined zero crossings of a second waveform; and a count analysis sub-system comprising a comparator configured to request a trip of an electrical device responsive to a determination that said first count of dips is greater than a first count threshold, but below a second count threshold.
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19. A machine-readable medium comprising machine executable instructions for activities comprising:
requesting a trip of an electrical device associated with an electrical circuit responsive to a determination that a count of dips is greater than a first count threshold, but below a second count threshold, said count of dips determined, for a first waveform, between a sequential pair of predetermined zero crossings of a second waveform.
Specification