... the traditional circuit breaker (fuse), contactors, overload (or over-current, phase) relays, starters, main isolator, etc. function with ... can be realized General (not frequent start) motor loads, frequent starter motor load, the load distribution control and protection circuit. ... , D). 2)into the main circuit poles: 3 pole,4pole. 3) subjects rated current rating: C framework includes: 12A, 16A, 18A ...