| CPC G01R 23/02 (2013.01) [G01R 31/58 (2020.01)] | 7 Claims |
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1. An apparatus for detecting arcs on a line, comprising:
a current sensor outputting a signal corresponding to current flowing through the line;
a circuit breaker; and
a plurality of filters including a low-pass filter, at least one band-pass filter, and a high-pass filter, the plurality of filters being configured to filter a signal output from the current sensor,
wherein the apparatus is configured to:
perform analog-to-digital conversion (ADC) and a frequency analysis for a low-\ band signal filtered by the low-pass filter,
compare an amplitude of a mid-band signal filtered by the at least one band-pass filter with a first reference value without performing the ADC and a frequency analysis for the mid-band signal to generate a first comparison result,
compare an amplitude of a high-band signal filtered by the high-pass filter with a second reference value different from the first reference value without performing the ADC and a frequency analysis for the high-band signal to generate a second comparison result, and
determine whether an arc occurs on the line based on a result of the frequency analysis for the low-band signal, the first comparison result, and the second comparison result, and
block direct current flowing through the line by switching on the circuit breaker when it is determined that an arc has occurred on the line.
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