EN 60947-2:2017

FOREWORD
1 General
2 Terms and definitions
3 Classification
4 Characteristics of circuit-breakers
5 Product information
6 Normal service, mounting and transport conditions
7 Constructional and performance requirements
8 Tests
Annex A (normative) - Co-ordination between a
        circuit-breaker and another short-circuit
        protective device associated in the same
        circuit
Annex B (normative) - Circuit-breakers incorporating
        residual current protection
Annex C (normative) - Individual pole short-circuit
        test sequence
Annex D - Vacant
Annex E (informative) - Items subject to agreement
        between manufacturer and user
Annex F (normative) - Additional tests for circuit-breakers
        with electronic over-current protection
Annex G (normative) - Power loss
Annex H (normative) - Test sequence for circuit-breakers
        for IT systems
Annex J (normative) - Electromagnetic compatibility
        (EMC) - Requirements and test methods for
        circuit-breakers
Annex K (informative) - Glossary of symbols and
        graphical representation of characteristics
Annex L (normative) - Circuit-breakers not fulfilling
        the requirements for overcurrent protection
Annex M (normative) - Modular residual current
        devices (without integral current breaking device)
Annex N (normative) - Electromagnetic compatibility
        (EMC) - Additional requirements and test methods
        for devices not covered by Annex B, Annex F and
        Annex M
Annex O (normative) - Instantaneous trip circuit-breakers
        (ICB)
Annex P (normative) - DC circuit-breakers for use in
        photovoltaic (PV) applications
Annex Q Vacant
Annex R (normative) - Circuit-breakers incorporating
        residual current protection with automatic
        re-closing functions
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their corresponding
         European publications
Annex ZZA (informative) - Relationship between this
          European standard and the essential requirements
          of Directive 2014/30/EU [2014 OJ L96] aimed to
          be covered and the standardisation request M/552
Annex ZZB (informative) - Relationship between this
          European standard and the safety objectives of
          Directive 2014/35/EU [2014 OJ L96] aimed to
          be covered

IEC 60947-2:2016 is available as IEC 60947-2:2016
RLV which contains the International Standard and its Redline
version, showing all changes of the technical content compared to
the previous edition.


IEC 60947-2:2016 applies to circuit-breakers, the main contacts of which are intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c.; it also contains additional requirements for integrally fused circuit-breakers. This fifth edition cancels and replaces the fourth edition published in 2006, Amendment 1:2009 and Amendment 2:2013. This edition constitutes a technical revision. This edition includes the following significant additions with respect to the previous edition:

- tests for verification of selectivity in Annex A (see A.5.3);

- critical load current tests for d.c. circuit-breakers (see 8.3.9);

- new Annex P for circuit-breakers for use in photovoltaic applications;

- new Annex R for residual-current circuit-breakers with automatic reclosing functions.