EN 60947-4-2:2012

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviations
4 Classification
5 Characteristics of a.c. semiconductor motor
  controllers and starters
6 Product information
7 Normal service, mounting and transport conditions
8 Constructional and performance requirements
9 Tests
Annex A (normative) - Marking and identification
        of terminals
Annex B - Vacant
Annex C (normative) - Co-ordination at the crossover
        current between the starter and associated
        SCPD
Annex D - Vacant
Annex E - Vacant
Annex F (informative) - Operating capability
Annex G (informative) - Examples of control circuit
        configurations
Annex H - Vacant
Annex I (normative) - Modified test circuit for
        short-circuit testing of semiconductor motor
        controllers and starters
Annex J (informative) - Flowchart for constructing
        bypassed semiconductor controllers tests
Annex K (normative) - Extended functions within
        electronic overload relays
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications
Annex ZZ (informative) - Coverage of Essential
         Requirements of EU Directives

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 publication is to be read in conjunction with IEC 60947-1:2007.