IEC 60947-2:2016

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 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

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. The contents of the corrigendum of November 2016 have been included in this copy.