IEC 60947-4-2:2020 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.
IEC 60947-4-2 Ed. 4.0 b:2020
Original price was: $455.00.$227.00Current price is: $227.00.
Low-voltage switchgear and controlgear – Part 4-2: Contactors and motor-starters – AC semiconductor motor controllers and starters
International Electrotechnical Commission , 06/26/2020
Pages: 230




