Motor protection breakers as a form of effective drive protection

摘要

What are motor breakers and what do they do? In short words: motor protection breakers are connectors for connecting, protecting and separating current circuits with load. Moreover, these connectors protect drives from damage due to start-up block, overload, short circuit or one phase failure in 3-phase mains. They are characterized by the presence of a thermal and electromagnetic release and the possibility to connect to them undervoltage release, shunt release, auxiliary contacts and release-signalling contacts.