IEC 60947-4-2

This standard applies to a.c. semiconductor motor controllers and starters, which may include a series mechanical switching device, intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V a.c. This standard characterizes a.c. semiconductor motor controllers and starters with and without bypass means.

This part of IEC 60947 applies to semiconductor motor controllers, starters and sft-starters which can include a series mechanical switching device, intended to be connected to circuits the rated voltage of which does not exceed 1 000 V AC. This document characterizes semiconductor motor controllers and starters with and without bypass means.