RO
SR EN 60947-4-2:2012
Low-voltage switchgear and controlgear -- Part 4-2: Contactors and motor-starters - AC semiconductor motor controllers and starters
IEC 60947-4-2:2011 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 third edition replaces the second edition published in 1999 and its Amendments 1 (2001) and 2 (2006). It is a technical revision. This edition includes the following significant technical changes with respect to the previous edition and its amendments: - updated EMC normative references and associated requirements, - new references to IEC 60947-1, - marking of electronic relays without thermal memory, - marking of tripping time at 0 °C ambient or below, - new test requirements for limits of operation of time-delay overload relays, - new classes of overload current withstand time, - damp heat, salt mist, vibration and shock tests, - short-circuit test in the smallest enclosure, - update of the routine and sampling tests. This p
Status :
Withdrawn
Approval date : 11/29/2012
Withdrawal date : 1/11/2026
Number of pages : 108
ICS : 29.130.20 Low voltage switchgear and controgear
Technical Committee : 9 - Low-voltage switchgear and controlgear
- Replaces SR EN 60947-4-2:2001/A1:2003
- Replaces SR EN 60947-4-2:2001/A2:2007
- Replaces SR EN 60947-4-2:2001
- Normative reference SR EN 60269-1:2008
- Normative reference SR EN 60034-1:2011
- Normative reference SR EN 60269-1:2008/A1:2010
- Normative reference SR EN 60947-1:2008
- Normative reference SR EN 55011:2010
- Normative reference SR EN 60085:2008
- Normative reference SR EN 55011:2010/A1:2011
- Replaced by SR EN IEC 60947-4-2:2023