Circuit breaker having a microprocessor-controlled tripping device and a bypass circuit
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United States of America Patent
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Feb 13, 2007
Grant Date -
Jul 28, 2005
app pub date -
Mar 8, 2003
filing date -
Mar 13, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A circuit breaker includes current detectors, a microprocessor-controlled tripping device, and a bypass circuit that interacts with a watchdog circuit that monitors the proper functioning of the microprocessor. A switchable reference voltage is made available to the bypass circuit as a function of the momentary supply voltage. During short circuits, the bypass circuit, immediately upon being switched on, responds to very high limit current values, whereas after the switch-on phase, it already responds at moderately high limit current values.
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