Electric leak breaker for self-test
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United States of America Patent
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Issued Date -
Nov 3, 2005
app pub date -
Jul 21, 2004
filing date -
Apr 30, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention disclosed herein is an electric leak breaker for self-test. The electric leak breaker for self-test comprises power supply lines for connecting a power source supply with a load; a zero-phase current transformer installed on the power supply lines and for sensing a current difference between the power supply lines; a leakage current detecting unit connected to the zero-phase current transformer for detecting whether a leakage current occurs to generate a detection signal; a driving unit for making the power supply lines broken when a critical voltage or a voltage higher than the critical voltage is provided; and a self-test unit for periodically inducing the leakage current at the power supply lines to test whether the leakage detecting unit is normally operating, and for providing a lower voltage than the critical voltage to the driving unit to test whether the driving unit is normally operating in a self-test operation. According to the present invention, it is possible to periodically test the electric leak breaker as well as to overcome an inconvenience to push a reset button.
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