TRIPPING UNIT FOR CIRCUIT BREAKER

摘要

A multipolar circuit breaker includes main circuits having main contacts and a latching mechanism for tripping the main contacts of main circuits. A tripping unit configured to actuate the latching mechanism in response to detection of an over-current in at least one of the main circuits. The tripping unit is plugged into a section of the circuit breaker and includes at least one bimetal strip connected in series with at least one of the main circuits and operatively connected with the latching mechanism.