MINIATURE CIRCUIT BREAKER

摘要

A miniature circuit breaker having a control unit arranged to produce a trip signal to trigger a trip mechanism into opening a pair of contacts if it determines that an overcurrent condition occurs based on an output of a current sensor; an electric motor operable to close the contacts via a contact closing mechanism; a force transfer mechanism arranged to transform a first trigger force into a second trigger force larger than the first trigger force, wherein the force transfer mechanism couples an electromechanical actuator to a contact opening mechanism such that the second trigger force triggers the contact opening mechanism into opening the contacts; and/or a mechanical energy store arranged to accumulate mechanical energy from operation of the closing actuator and subsequently to release accumulated mechanical energy to close the contacts.