Leakage current detection device with self-testing function
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United States of America Patent
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Jan 17, 2017
Grant Date -
Jun 16, 2016
app pub date -
Feb 4, 2015
filing date -
Dec 15, 2014
priority date (Note) -
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Abstract
A leakage current detection device coupled to AC power supply wires carrying an AC signal, which includes: a leakage current detection circuit including a leakage current detector, the leakage current detection circuit operating during first half-cycles among positive and negative half-cycles of the AC signal to detect a leakage current of the power supply wires and to disconnect the power supply wires from an output side when a leakage current exceeding a first threshold value is detected; and a self-detecting circuit coupled to the leakage current detection circuit, operating during second half-cycles among the positive and negative half-cycles of the AC signal to test whether the leakage current detection circuit is functioning normally.
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