Combined trip unit and accessory module for electronic trip circuit breakers
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United States of America Patent
Stats
-
Jul 12, 1988
Issued Date -
N/A
app pub date -
Jul 30, 1987
filing date -
Jul 7, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A combined trip actuator and accessory module for molded case circuit breakers is accessible in the field for user selected accessory options. The trip actuator includes a U-shaped stator with a permanent magnet at the end of one leg. A spring-loaded armature member extends across both legs to form a closed-loop magnetic circuit. The over-current trip coil and shunt trip coil are arranged on one leg with the undervoltage coil arranged on the other leg. The accessory module is accessible from the top surface of the breaker cover for field installation of the undervoltage and shunt trip coils to provide the corresponding undervoltage and shunt trip functions.
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