GOST IEC 60947-4-3-2017 Low-voltage switchgear and controlgear. Part 4-3. Contactors and motor-starters. AC semiconductor controllers and contactors for non-motor loads
2018GOST IEC 60947-4-3-2017 Low-voltage switchgear and controlgear. Part 4-3. Contactors and motor-starters. AC semiconductor controllers and contactors for non-motor loads
2014GOST IEC 60947-4-3-2014 Low-voltage switchgear and controlgear. Part 4-3. Contactors and motor starters. AC semiconductor controllers and contactors for non-motor loads