IEC 60947-4-3:2014

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, symbols and
  abbreviations
4 Classification
5 Characteristics of a.c. semiconductor controllers
  and contactors
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 (informative) - Typical service conditions for
        controllers and contactors
Annex C Vacant
Annex D Vacant
Annex E Vacant
Annex F (informative) - Operating capability
Annex G Vacant
Annex H Vacant
Annex I (normative) - Modified test circuit for
        short-circuit testing of semiconductor
        contactors and controllers
Annex J (informative) - Flowchart for constructing
        bypassed semiconductor controllers tests
Bibliography

IEC 60947-4-3:2014 applies to a.c. semiconductor non-motor load controllers and contactors intended for performing electrical operations by changing the state of a.c. electric circuits between the ON-state and the OFF-state. Typical applications are classified by utilization categories given in Table 2. This second edition cancels and replaces the first edition published in 1999, Amendment 1:2006 and Amendment 2:2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) Update of the marking requirements (6.1);
b) Update of the EMC requirements (8.3.2); and
c) Update of the tests requirements (9.3.1, 9.4, 9.4.1.1, 9.4.1.2, 9.4.2.1, 9.4.2.2, 9.4.2.3, 9.4.2.4, 9.4.2.6).

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