SIST EN 60947-2:2017

SLOVENSKI STANDARD
01-december-2017
1DGRPHãþD
SIST EN 60947-2:2006
SIST EN 60947-2:2006/A1:2009
SIST EN 60947-2:2006/A2:2013
Nizkonapetostne stikalne naprave - 2. del: Odklopniki (IEC 60947-2:2016)
Low-voltage switchgear and controlgear - Part 2: Circuit-breakers (IEC 60947-2:2016)
Niederspannungsschaltgeräte - Teil 2: Leistungsschalter (IEC 60947-2:2016)
Appareillage à basse tension - Partie 2: Disjoncteurs (IEC 60947-2:2016)
Ta slovenski standard je istoveten z: EN 60947-2:2017
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60947-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2017
ICS 29.130.20 Supersedes EN 60947-2:2006
English Version
Low-voltage switchgear and controlgear -
Part 2: Circuit-breakers
(IEC 60947-2:2016 + COR1:2016)
Appareillage à basse tension - Partie 2: Disjoncteurs Niederspannungsschaltgeräte - Teil 2: Leistungsschalter
(IEC 60947-2:2016 + COR1:2016) (IEC 60947-2:2016 + COR1:2016)
This European Standard was approved by CENELEC on 2016-07-12. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60947-2:2017 E
European foreword
The text of document 121A/71/FDIS, future edition 5 of IEC 60947-2, prepared by
SC 121A “Low-voltage switchgear and controlgear” of IEC/TC 121 “Switchgear and controlgear and
their assemblies for low voltage” was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 60947-2:2017.
The following dates are fixed:
• latest date by which the document has to be (dop) 2018-04-13
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2020-10-13
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60947-2:2006.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directives.

For the relationship with EU Directives and the standardization requests see informative Annex ZZA
and Annex ZZB, which are integral parts of this document.

Endorsement notice
The text of the International Standard IEC 60947-2:2016 + COR1:2016 was approved by CENELEC
as a European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60051 Series NOTE Harmonized as EN 60051 Series.
IEC 60112 NOTE Harmonized as EN 60112.
IEC 60898 Series NOTE Harmonized as EN 60898 Series.
IEC 60934 NOTE Harmonized as EN 60934.
IEC 60947-3 NOTE Harmonized as EN 60947-3.
IEC 60947-5-1 NOTE Harmonized as EN 60947-5-1.
IEC 61000-4-13 NOTE Harmonized as EN 61000-4-13.
IEC 61008-1:2010 NOTE Harmonized as EN 61008-1:2012 (modified).
IEC 61008-1:2010/A1:2012 NOTE Harmonized as EN 61008-1:2012/A1:2014 (modified).
IEC 61008-1:2010/A2:2013 NOTE Harmonized as EN 61008-1:2012/A2:2014 (modified).
IEC 61009-1:2010 NOTE Harmonized as EN 61009-1:2012 (modified).
IEC 61009-1:2010/A1:2012 NOTE Harmonized as EN 61009-1:2012/A1:2014 (modified).
IEC 61009-1:2010/A2:2013 NOTE Harmonized as EN 61009-1:2012/A2:2014 (modified).
IEC 61131-1:2003 NOTE Harmonized as EN 61131-1:2003 (not modified).
IEC 61439 Series NOTE Harmonized as EN 61439 Series.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu
Publication Year Title EN/HD Year

IEC 60068-2-14 -  Environmental testing - EN 60068-2-14 2009
Part 2-14: Tests - Test N: Change of
temperature
IEC 60068-2-30 -  Environmental testing - EN 60068-2-30 2005
Part 2-30: Tests - Test Db: Damp heat,
cyclic (12 h + 12 h cycle)
IEC 60269-1 2006 Low-voltage fuses - EN 60269-1 2007
Part 1: General requirements
IEC 60364 Series Low-voltage electrical installations HD 60364 Series
IEC 60664-1 2007 Insulation coordination for equipment EN 60664-1 2007
within low-voltage systems -
Part 1: Principles, requirements and tests
IEC 60947-1 2007 Low-voltage switchgear and controlgear - EN 60947-1 2007
Part 1: General rules
+A1 2010  +A1 2011
+A2 2014  +A2 2014
IEC 60947-4-1 -  Low-voltage switchgear and controlgear - EN 60947-4-1 2010
Part 4-1: Contactors and motor-starters -
Electromechanical contactors and motor-
starters
IEC 61000-3-2 -  Electromagnetic compatibility (EMC) - EN 61000-3-2 2014
Part 3-2: Limits - Limits for harmonic
current emissions (equipment input current
≤ 16 A per phase)
IEC 61000-3-3 -  Electromagnetic compatibility (EMC) - EN 61000-3-3 2013
Part 3-3: Limits - Limitation of voltage
changes, voltage fluctuations and flicker in
public low-voltage supply systems, for
equipment with rated current ≤ 16 A per
phase and not subject to conditional
connection
IEC 61000-4-2 -  Electromagnetic compatibility (EMC) - EN 61000-4-2 2009
Part 4-2: Testing and measurement
techniques - Electrostatic discharge
immunity test
Publication Year Title EN/HD Year

IEC 61000-4-3 2006 Electromagnetic compatibility (EMC) - EN 61000-4-3 2006
Part 4-3: Testing and measurement
techniques - Radiated, radio-frequency,
electromagnetic field immunity test
+A1 2007  +A1 2008
+A2 2010  +A2 2010
IEC 61000-4-4 2012 Electromagnetic compatibility (EMC) - EN 61000-4-4 2012
Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst
immunity test
IEC 61000-4-5 2014 Electromagnetic compatibility (EMC) - EN 61000-4-5 2014
Part 4-5: Testing and measurement
techniques - Surge immunity test
IEC 61000-4-6 2013 Electromagnetic compatibility (EMC) - EN 61000-4-6 2014
Part 4-6: Testing and measurement
techniques - Immunity to conducted
disturbances, induced by radio-frequency
fields
IEC 61000-4-11 -  Electromagnetic compatibility (EMC) - EN 61000-4-11 2004
Part 4-11: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations
immunity tests
IEC 61140 -  Protection against electric shock - EN 61140 2016
Common aspects for installation and
equipment
IEC 62475 2010 High-current test techniques - Definitions EN 62475 2010
and requirements for test currents and
measuring systems
CISPR 11 -  Industrial, scientific and medical EN 55011 2016
equipment - Radio-frequency disturbance
characteristics - Limits and methods of
measurement
1)
CISPR 22 -  Information technology equipment - Radio EN 55022 2010
1)
disturbance characteristics - Limits and + AC 2011
methods of measurement
1)
Superseded by EN 50561-1:2013.
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
This European standard has been prepared under the European Commission standardisation request
C(2016) 7641 final of 30.11.2016 , ('M/552'), as regards harmonised standards in support of Directive
2014/30/EU relating to electromagnetic compatibility, to provide one voluntary means of conforming to
essential requirements of Directive 2014/30/EU of the European Parliament and of the Council of 26
February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic
compatibility [2014 OJ L96].
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZZA.1 confers, within the limits
of the scope of this standard, a presumption of conformity with the corresponding essential
requirements of that Directive, and associated EFTA regulations.

Table ZZA.1 – Correspondence between this European standard and the
Essential Requirements set out in Directive 2014/30/EU [2014 OJ L96]

Clause(s) / sub-clause(s)
Essential requirements of
Remarks / Notes
Directive 2014/30/EU
of this EN
Annex I. 1(a) (electromagnetic 7.3, B.7.3, B.8.12.2, F.5, J.1,
J.3, M.7.2.12, M.8.16.2, N.3,
disturbances)
P.7.3 and no others.
Annex I. 1(b) (electromagnetic 7.3, B.7.3, B.8.12.1, F.2.2, F.3, Full coverage of requirements
F.4, J.1, J.2, M.7.2.12, for conducted and radiated
immunity)
M.8.16.1, N.1, N.2, P.7.3 and disturbances in the range
no others. 150 kHz to 2,7 GHz
WARNING 1: Presumption of conformity stays valid only as long as a reference to this European
standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2: Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
COMMISSION IMPLEMENTING DECISION C(2016) 7641 final of 30.11.2016 on a standardisation request to the
European Committee for Standardisation, to the European Committee for Electrotechnical Standardisation and to the
European Telecommunications Standards Institute as regards harmonised standards in support of Directive 2014/30/EU
of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member
States relating to electromagnetic compatibility.
Annex ZZB
(informative)
Relationship between this European standard and the safety objectives of
Directive 2014/35/EU [2014 OJ L96] aimed to be covered
This European Standard has been prepared under a Commission’s standardization request relating to
harmonized standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means
of conforming to safety objectives of Directive 2014/35/EU of the European Parliament and of the
Council of 26 February 2014 on the harmonization of the laws of the Member States relating to the
making available on the market of electrical equipment designed for use within certain voltage limits
[2014 OJ L96].
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZZB.1 confers, within the limits
of the scope of this standard, a presumption of conformity with the corresponding safety objectives of
that Directive, and associated EFTA regulations.
Table ZZB.1 – Correspondence between this European standard and Annex I of Directive
2014/35/EU [2014 OJ L96]
Safety objectives of Directive Clause(s) / sub-clause(s) of this EN Remarks/note
2014/35/EU
1 a) Foreword, 1.1, 4, 5, B.5, H.5, L.5,
M.5, O.5, P.5, R.5
1 b) 5, L.5, M.5, O.4, P.5
1 c) 5.3
2 a) 5.2, 5.3, 7.1.3, 7.1.4, 7.2.3, 8.3, 8.4
2 b) 7.2.2, 7.3, 8.3.2, F.1, J.3
2 c) 5.3, 7.1, 7.1.2, 7.1.3, 7.1.5, 7.2.1, 7.3,
8.3.3 to 8.3.6, 8.4, 8.5, F.1, J.2, J.3
2 d) 5.2, 7.1.3, 7.1.4, 7.2.3, 8.3.2, F.2.2
3 a) 5.3, 7.1.2, 7.1.5, 7.2.1, 8.3.3 to 8.3.6,
8.4, 8.5
3 b) 7.3, F.1, J.3
3 c) 1.1, 7.2, 8.3
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
IEC 60947-2 ®
Edition 5.0 2016-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Low-voltage switchgear and controlgear –

Part 2: Circuit-breakers
Appareillage à basse tension –

Partie 2: Disjoncteurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.20 ISBN 978-2-8322-3355-9

– 2 – IEC 60947-2:2016 © IEC 2016
CONTENTS
FOREWORD . 14
1 General . 16
1.1 Scope and object . 16
1.2 Normative references . 17
2 Terms and definitions. 18
3 Classification . 22
4 Characteristics of circuit-breakers . 23
4.1 Summary of characteristics . 23
4.2 Type of circuit-breaker . 23
4.3 Rated and limiting values of the main circuit . 23
4.3.1 General . 23
4.3.2 Rated voltages . 23
4.3.3 Currents . 24
4.3.4 Rated frequency . 24
4.3.5 Rated duty . 24
4.3.6 Short-circuit characteristics . 24
4.4 Selectivity categories . 27
4.5 Control circuits . 27
4.5.1 Electrical control circuits . 27
4.5.2 Air-supply control circuits (pneumatic or electro-pneumatic) . 27
4.6 Auxiliary circuits . 27
4.7 Releases . 28
4.7.1 Types . 28
4.7.2 Characteristics . 28
4.7.3 Current setting of over-current releases . 28
4.7.4 Tripping time setting of over-current releases . 29
4.8 Integral fuses (integrally fused circuit-breakers) . 29
5 Product information . 29
5.1 Nature of the information . 29
5.2 Marking . 29
5.3 Instructions for installation, operation and maintenance . 31
6 Normal service, mounting and transport conditions . 31
7 Constructional and performance requirements. 31
7.1 Constructional requirements . 31
7.1.1 General . 31
7.1.2 Withdrawable circuit-breakers . 31
7.1.3 Additional requirements for circuit-breakers suitable for isolation . 32
7.1.4 Clearances and creepage distances . 32
7.1.5 Requirements for the safety of the operator . 32
7.1.6 List of construction breaks. 32
7.1.7 Additional requirements for circuit-breakers provided with a neutral pole . 33
7.1.8 Digital inputs and outputs for use with programmable logic controllers
(PLCs) . 33
7.2 Performance requirements . 33
7.2.1 Operating conditions . 33
7.2.2 Temperature-rise . 36

IEC 60947-2:2016 © IEC 2016 – 3 –
7.2.3 Dielectric properties . 37
7.2.4 Ability to make and break under no load, normal load and overload
conditions . 37
7.2.5 Ability to make and break under short-circuit conditions . 38
7.2.6 Vacant . 38
7.2.7 Additional requirements for circuit-breakers suitable for isolation . 38
7.2.8 Specific requirements for integrally fused circuit-breakers . 39
7.2.9 Co-ordination between a circuit-breaker and another short-circuit
protective device . 39
7.3 Electromagnetic compatibility (EMC) . 39
8 Tests . 39
8.1 Kind of tests . 39
8.1.1 General . 39
8.1.2 Type tests . 39
8.1.3 Routine tests . 40
8.2 Compliance with constructional requirements . 40
8.3 Type tests . 40
8.3.1 Test sequences . 40
8.3.2 General test conditions . 48
8.3.3 Test sequence I: General performance characteristics . 56
8.3.4 Test sequence II: Rated service short-circuit breaking capacity . 65
8.3.5 Test sequence III: Rated ultimate short-circuit breaking capacity . 66
8.3.6 Test sequence IV: Rated short-time withstand current . 68
8.3.7 Test sequence V: Performance of integrally fused circuit-breakers . 69
8.3.8 Test sequence VI: combined test sequence . 71
8.3.9 Critical d.c. load current test . 72
8.4 Routine tests . 73
8.4.1 General . 73
8.4.2 Mechanical operation tests . 74
8.4.3 Verification of the calibration of overcurrent releases . 74
8.4.4 Verification of the operation of undervoltage and shunt releases . 75
8.4.5 Additional tests for CBRs . 75
8.4.6 Dielectric tests . 75
8.4.7 Test for the verification of clearances less than those corresponding to
case A of Table 13 of IEC 60947-1:2007 . 76
8.5 Special tests – Damp heat, salt mist, vibration and shock . 76
Annex A (normative) Co-ordination between a circuit-breaker and another short-circuit
protective device associated in the same circuit . 79
A.1 General . 79
A.2 Scope and object . 79
A.3 General requirements for the co-ordination of a circuit-breaker with another
SCPD . 80
A.3.1 General considerations . 80
A.3.2 Take-over current . 80
A.3.3 Behaviour of C in association with another SCPD . 80
A.4 Type and characteristics of the associated SCPD . 80
A.5 Verification of selectivity . 81
A.5.1 General . 81
A.5.2 Consideration of selectivity by desk study . 81
A.5.3 Selectivity determined by test . 82

– 4 – IEC 60947-2:2016 © IEC 2016
A.6 Verification of back-up protection . 83
A.6.1 Determination of the take-over current . 83
A.6.2 Verification of back-up protection . 83
A.6.3 Tests for verification of back-up protection . 83
A.6.4 Results to be obtained . 84
Annex B (normative)  Circuit-breakers incorporating residual current protection . 90
B.1 General . 90
B.1.1 Preamble . 90
B.1.2 Scope and object . 90
B.2 Terms and definitions . 91
B.2.1 Terms and definitions relating to currents flowing from live parts to
earth . 91
B.2.2 Terms and definitions relating to the energization of a CBR . 91
B.2.3 Terms and definitions relating to the operation and the functions of a
CBR . 92
B.2.4 Terms and definitions relating to values and ranges of energizing
quantities . 93
B.3 Classification . 94
B.3.1 Classification according to the method of operation of the residual
current function . 94
B.3.2 Classification according to the possibility of adjusting the residual
operating current . 94
B.3.3 Classification according to time-delay of the residual current function . 94
B.3.4 Classification according to behaviour in presence of a d.c. component . 94
B.4 Characteristics of CBRs concerning their residual current function . 94
B.4.1 Rated values . 94
B.4.2 Preferred and limiting values . 95
B.4.3 Value of the rated residual short-circuit making and breaking capacity
(I ) . 96
∆m
B.4.4 Operating characteristics in case of an earth fault current in the
presence or absence of a d.c. component . 96
B.5 Marking . 96
B.6 Normal service, mounting and transport conditions . 97
B.7 Design and operating requirements . 98
B.7.1 Design requirements . 98
B.7.2 Operating requirements . 98
B.7.3 Electromagnetic compatibility . 100
B.8 Tests . 100
B.8.1 General . 100
B.8.2 Verification of the operating characteristic . 103
B.8.3 Verification of dielectric properties . 104
B.8.4 Verification of the operation of the test device at the limits of rated
voltage . 105
B.8.5 Verification of the limiting value of the non-operating current under
over-current conditions. 105
B.8.6 Verification of the resistance against unwanted tripping due to surge
currents resulting from impulse voltages . 106
B.8.7 Verification of the behaviour of CBRs of type A in the case of an earth
fault current comprising a d.c. component . 107
B.8.8 Verification of the behaviour of CBRs functionally dependent on line
voltage classified under B.3.1.2.1 . 108

IEC 60947-2:2016 © IEC 2016 – 5 –
B.8.9 Verification of the behaviour of CBRs functionally dependent on line
voltage as classified under B.3.1.2.2 in the case of failure of line voltage . 109
B.8.10 Verification of the residual short-circuit making and breaking capacity . 110
B.8.11 Verification of the effects of environmental conditions . 111
B.8.12 Verification of electromagnetic compatibility . 111
B.8.13 Test for variations or interruptions of voltage and for voltage dips . 113
Annex C (normative)  Individual pole short-circuit test sequence . 120
C.1 General . 120
C.2 Test of individual pole short-circuit breaking capacity . 120
C.3 Verification of dielectric withstand . 120
C.4 Verification of overload releases . 120
Annex D Vacant . 121
Annex E (informative) Items subject to agreement between manufacturer and user . 122
Annex F (normative) Additional tests for circuit-breakers with electronic over-current

protection . 123
F.1 General . 123
F.2 List of tests . 123
F.2.1 General . 123
F.2.2 Electromagnetic compatibility (EMC) tests . 123
F.2.3 Suitability for multiple frequencies . 124
F.2.4 Dry heat test . 124
F.2.5 Damp heat test. 124
F.2.6 Temperature variation cycles at a specified rate of change . 124
F.3 General test conditions . 124
F.3.1 General . 124
F.3.2 Electromagnetic compatibility tests . 124
F.4 Immunity tests . 125
F.4.1 Harmonic currents . 125
F.4.2 Electrostatic discharges . 126
F.4.3 Radiated RF electromagnetic fields . 126
F.4.4 Electrical fast transient/burst (EFT/B) . 126
F.4.5 Surges . 127
F.4.6 Conducted disturbances induced by RF fields (common mode) . 127
F.4.7 Current dips . 127
F.5 Emission tests . 128
F.5.1 Harmonics . 128
F.5.2 Voltage fluctuations . 128
F.5.3 Conducted RF disturbances (150 kHz to 30 MHz) . 128
F.5.4 Radiated RF disturbances (30 MHz to 1 GHz) . 128
F.6 Suitability for multiple frequencies . 129
F.6.1 General . 129
F.6.2 Test conditions . 129
F.6.3 Test procedure . 129
F.6.4 Test results . 129
F.7 Dry heat test . 129
F.7.1 Test procedure . 129
F.7.2 Test results . 130
F.7.3 Verification of overload releases . 130
F.8 Damp heat test . 130

– 6 – IEC 60947-2:2016 © IEC 2016
F.8.1 Test procedure . 130
F.8.2 Verification of overload releases . 130
F.9 Temperature variation cycles at a specified rate of change . 130
F.9.1 Test conditions . 130
F.9.2 Test procedure . 130
F.9.3 Test results . 131
F.9.4 Verification of overload releases . 131
Annex G (normative) Power loss . 144
G.1 General . 144
G.2 Test methods . 144
G.2.1 General case . 144
G.2.2 AC circuit-breakers of rated current not exceeding 400 A . 144
G.2.3 DC circuit-breakers . 145
G.3 Test procedure . 145
Annex H (normative) Test sequence for circuit-breakers for IT systems . 147
H.1 General . 147
H.2 Individual pole short-circuit . 147
H.3 Verification of dielectric withstand . 148
H.4 Verification of overload releases . 148
H.5 Marking . 148
Annex J (normative)  Electromagnetic compatibility (EMC) – Requirements and test
methods for circuit-breakers . 149
J.1 General . 149
J.2 Immunity . 150
J.2.1 General . 150
J.2.2 Electrostatic discharges . 152
J.2.3 Radiated RF electromagnetic fields . 153
J.2.4 Electrical fast transients/bursts (EFT/B) . 153
J.2.5 Surges . 153
J.2.6 Conducted disturbances induced by RF fields (common mode) . 154
J.3 Emission . 154
J.3.1 General . 154
J.3.2 Conducted RF disturbances (150 kHz to 30 MHz) . 155
J.3.3 Radiated RF disturbances (30 MHz to 1 000 MHz) . 155
Annex K (informative)  Glossary of symbols and graphical representation of
characteristics . 160
Annex L (normative) Circuit-breakers not fulfilling the requirements for overcurrent
protection . 169
L.1 General . 169
L.2 Terms and definitions . 169
L.3 Classification . 169
L.4 Rated values . 169
L.4.1 Rated current (I ) . 169
n
L.4.2 Rated conditional short-circuit current (I ) . 170
cc
L.5 Product information . 170
L.6 Constructional and performance requirements . 170
L.7 Tests . 170
L.7.1 General . 170
L.7.2 Rated conditional short-circuit tests . 171

IEC 60947-2:2016 © IEC 2016 – 7 –
Annex M (normative) Modular residual current devices (without integral current
breaking device) . 174
M.1 General . 174
M.1.1 Field of application . 174
M.1.2 Field of application . 174
M.2 Terms and definitions . 174
M.2.1 Terms and definitions relating to the energization of an MRCD . 174
M.2.2 Terms and definitions relating to the operation and the functions of an
MRCD . 175
M.3 Classification . 175
M.3.1 Classification according to the configuration of the primary conductors . 175
M.3.2 Classification according to the method of operation . 176
M.3.3 Classification according to the possibility of adjusting the residual
operatin
...