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IEC 60947-4-2-2020 pdf free download - Low-voltage switchgear and controlgear – Part 4-2: Contactors and motor-starters – Semiconductor motor controllers, starters and soft-starters This part of lEC 60947 applies to semiconductor motor controllers,starters and soft-starterswhich can include...

IEC 60947-4-2-2011 pdf free download - Low-voltage switchgear and controlgear – Part 4-2: Contactors and motor-starters – AC semiconductor motor controllers and starters. This standard applies to a.c. semiconductor motor controllers and starters,which may includea series mechanical...