Circuit breaker with improved magnetic trip response
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United States of America Patent
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Feb 27, 1996
Grant Date -
N/A
app pub date -
Aug 2, 1994
filing date -
Aug 2, 1994
priority date (Note) -
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Abstract
An industrial-rated circuit breaker includes an electronic trip unit for long time, short time and instantaneous overcurrent protection. Current transformers contained within the circuit breaker enclosure sample the circuit current and supply the trip unit with signals indicative of the circuit current in real time. Upon receipt of an overcurrent condition the trip unit actuates the circuit breaker operating mechanism to separate the circuit breaker contacts for circuit interruption. A supplemental magnet trip actuator interacts with the current transformer and the operating mechanism to provide enhanced short circuit response.
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