IEC 62606:2013

IEC 62606 ®
Edition 1.1 2017-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
General requirements for arc fault detection devices

Exigences générales des dispositifs pour la détection de défaut d’arcs

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IEC 62606 ®
Edition 1.1 2017-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
General requirements for arc fault detection devices

Exigences générales des dispositifs pour la détection de défaut d’arcs

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.01; 29.120.50 ISBN 978-2-8322-3958-2

IEC 62606 ®
Edition 1.1 2017-02
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
General requirements for arc fault detection devices

Exigences générales des dispositifs pour la détection de défaut d’arcs

– 2 – IEC 62606:2013+AMD1:2017 CSV
© IEC 2017
CONTENTS
FOREWORD . 9
INTRODUCTION . 11
1 Scope . 12
2 Normative references . 13
3 Terms and definitions . 14
4 Classification . 17
4.1 According to the method of construction . 17
4.2 According to the method of mounting and connection . 17
4.3 According to the number of poles and current paths . 17
4.4 AFDD providing monitoring information . 17
5 Characteristics of AFDDs . 17
5.1 Summary of characteristics and conditions to mitigate the risk of fire . 17
5.2 Rated quantities and other characteristics . 18
5.2.1 Rated voltage . 18
5.2.2 Rated current (I ) . 18
n
5.2.3 Rated frequency . 18
5.2.4 Rated making and breaking capacity (I ) . 18
m
5.2.5 Rated making and breaking capacity on one pole (I ) . 19
m1
5.3 Standard and preferred values . 19
5.3.1 Preferred values of rated voltage (U ) . 19
n
5.3.2 Preferred values of rated current (I ) . 19
n
5.3.3 Preferred Standard values of rated frequency . 19
5.3.4 Minimum value of the rated making and breaking capacity (I ) . 20
m
5.3.5 Minimum value of the rated making and breaking capacity on one
pole (I ) . 20
m1
5.3.6 Standard and preferred values of the rated conditional short-circuit
current (I ) and standard and preferred values of the rated
nc
conditional short circuit current for one pole (I ) . 20
nc1
5.3.7 Limiting values of operating criteria for AFDDs for low and high arc
currents . 21
5.4 Standard value of rated impulse withstand voltage (U ) . 22
imp
5.5 Coordination with short-circuit protective devices (SCPDs) . 22
5.5.1 General . 22
5.5.2 Rated conditional short-circuit current (I ) and rated conditional
nc
short-circuit on one pole (I ) . 22
nc1
5.5.3 Operating characteristics of opening means for AFDDs according
to 4.1.1 . 22
6 Marking and other product information . 23
6.1 Marking . 23
6.2 Additional marking for AFDDs according to 4.1.1 . 25
6.2.1 Marking of AFDDs . 25
6.2.2 Instructions for wiring and operation . 25
7 Standard conditions for operation in service and for installation . 25
7.1 Standard conditions . 25
7.2 Conditions of installation . 26
7.3 Pollution degree . 26
8 Requirements for construction and operation . 26

© IEC 2017
8.1 General . 26
8.2 Mechanical design . 27
8.2.1 General . 27
8.2.2 Mechanism . 28
8.2.3 Clearances and creepage distances (see Annex B) . 29
8.2.4 Screws, current-carrying parts and connections . 32
8.2.5 Terminals for external conductors . 32
8.3 Protection against electric shock . 34
8.4 Dielectric properties and isolating capability . 35
8.5 Temperature rise . 35
8.5.1 Temperature-rise limits . 35
8.5.2 Ambient air temperature . 36
8.6 Operating characteristics . 36
8.6.1 Operating characteristics of the protective device part . 36
8.6.2 Operating characteristics . 36
8.7 Mechanical and electrical endurance . 37
8.8 Performance at short-circuits currents . 37
8.9 Resistance to mechanical shock and impact . 37
8.10 Resistance to heat. 37
8.11 Resistance to abnormal heat and to fire . 37
8.12 Behaviour of AFDDs in case of overcurrents in the main circuit . 37
8.13 Behaviour of AFDDs in case of current surges caused by impulse voltages . 38
8.14 Reliability . 38
8.15 Electromagnetic compatibility (EMC) . 38
8.16 Masking test for correct operation behaviour in presence of various
appliances connected to the load side . 38
8.17 Performance of the AFD test device . 38
8.18 Performance in case of partial loss of supply connections . 39
9 Testing procedure . 39
9.1 General . 39
9.1.1 General testing procedure for the different type of AFDDs . 39
9.1.2 The characteristics of AFDDs are checked by means of type tests . 40
9.1.3 For certification purposes, type tests are carried out in test
sequences. . 40
9.1.4 Routine tests to be carried out by the manufacturer on each device . 40
9.2 Test conditions . 41
9.3 Test of indelibility of marking . 42
9.4 Test of reliability of screws, current-carrying parts and connections . 42
9.5 Test of reliability of terminals for external conductors . 43
9.6 Verification of protection against electric shock . 44
9.7 Test of dielectric properties . 45
9.7.1 General . 45
9.7.2 Resistance to humidity . 45
9.7.3 Insulation resistance of the main circuit . 46
9.7.4 Dielectric strength of the main circuit . 46
9.7.5 Insulation resistance and dielectric strength of auxiliary circuits . 47
9.7.6 Capability of control circuits connected to the main circuit in respect
of withstanding high d.c. voltages due to insulation measurements . 48
9.7.7 Verification of impulse withstand voltages (across clearances and
across solid insulation) and of leakage current across open contacts . 48

– 4 – IEC 62606:2013+AMD1:2017 CSV
© IEC 2017
9.8 Test of temperature-rise . 52
9.8.1 Ambient air temperature . 52
9.8.2 Test procedure . 52
9.8.3 Measurement of the temperature of parts . 52
9.8.4 Temperature-rise of a part . 52
9.9 Verification of the operating characteristics . 53
9.9.1 General . 53
9.9.2 Series arc fault tests . 53
9.9.3 Parallel arc fault tests . 56
9.9.4 Masking test, verification of correct operation . 58
9.9.5 Unwanted tripping test . 60
9.10 Verification of mechanical and electrical endurance . 62
9.10.1 General test conditions . 62
9.10.2 Test procedure . 63
9.10.3 Condition of the AFDD after test . 63
9.11 Verification of the behaviour of the AFDD under short-circuit conditions . 63
9.11.1 General . 63
9.11.2 Short-circuit tests for AFDDs according to 4.1.1 . 64
9.12 Verification of resistance to mechanical shock and impact . 71
9.12.1 Mechanical shock . 71
9.12.2 Mechanical impact . 72
9.13 Test of resistance to heat . 74
9.14 Test of resistance to abnormal heat and to fire . 75
9.15 Verification of the trip-free mechanism . 76
9.15.1 General test conditions . 76
9.15.2 Test procedure . 76
9.16 Test of resistance to rusting . 77
9.17 Verification of limiting values of the non-operating current under overcurrent
conditions . 77
9.18 Verification of behaviour of AFDDs in case of current surges caused by
impulse voltages . 77
9.18.1 General . 77
9.18.2 Verification of behaviour at surge currents up to 3 000 A (8/20 ms
surge current test) . 77
9.19 Verification of reliability . 78
9.19.1 General . 78
9.19.2 Climatic test . 78
9.19.3 Test with temperature of 40 °C . 80
9.20 Verification of ageing of electronic components . 80
9.21 Electromagnetic compatibility (EMC) . 81
9.21.1 General . 81
9.21.2 EMC tests covered by other clauses of the present standard . 81
9.21.3 EMC tests to be performed . 81
9.21.4 AFDDs Performance criteria . 83
9.22 Verification of protection due to overvoltage due to a broken neutral in a
three phase system . 83
9.23 Verification of the behaviour in case of partial loss of supply connections . 83
Annex A (normative) Test sequence and number of samples to be submitted for
certification purposes . 111
Annex B (normative)  Determination of clearances and creepage distances . 120

© IEC 2017
Annex C (normative) Arrangement for the detection of the emission of ionized gases
during short-circuit tests . 125
Annex D (normative) Additional requirements and tests for AFDDs according to the
classification 4.1.3 designed to be assembled on site together with a main protective
device (circuit-breaker or RCCB or RCBO) . 128
Annex E (normative) Routine tests . 132
Annex F (informative) Description of the shaker arc test in 9.10.2 . 133
Annex IA (informative) Methods of determination of short-circuit power-factor . 135
Annex IB (informative) Examples of terminal designs . 137
Annex IC (informative) Correspondence between ISO and AWG copper conductors . 140
Annex ID (informative) Follow-up testing program for AFDDs . 141
Annex IE (informative) SCPDs for short-circuit tests . 145
Annex J (normative) Particular requirements for AFDDs with screwless type terminals
for external copper conductors . 147
Annex K (normative) Particular requirements for AFDDs with flat quick-connect
terminations . 155
Annex L (normative) Specific requirements for AFDDs with screw-type terminals for
external untreated aluminium conductors and with aluminium screw-type terminals for
use with copper or with aluminium conductors . 162
Bibliography . 172

Figure 1 – Thread forming tapping screw . 84
Figure 2 – Thread cutting tapping screw . 84
Figure 3 – Standard test finger (9.6) . 85
Figure 4 – Test circuit for series arc fault tests . 86
Figure 5 – Arc generator . 86
Figure 6 – Test circuit for parallel arc fault tests. 86
Figure 7 – Test circuit for parallel arc cable cutting test . 87
Figure 8 – Test apparatus . 87
Figure 9 – Test for verification of correct operation in case of parallel arc to ground . 87
Figure 10 – Test circuit for masking tests (inhibition and disturbing loads) . 87
Figure 11 – Test configuration for masking tests . 88
Figure 12 – EMI filter 1 for masking tests . 88
Figure 13 – EMI filter 2 for masking tests . 89
Figure 14 – EMI filter description installed in Figure 13 . 89
Figure 15 – Test circuit for masking tests with line impedance . 89
Figure 16 – Cross talk test . 90
Figure 17 – Controlled current test circuit Void . 91
Figure 18 – Controlled current with delay angle 45 °, 90 ° and 135 ° Void . 91
Figure 19 – Typical diagram for all short circuit tests except for 9.11.2.4 c) . 94
Figure 20 – Typical diagram for short circuit tests ((9.11.2.4.c) . 96
Figure 21 – Detail of impedance Z, Z and Z . 97
1 2
Figure 22 – Example of calibration record for short-circuit test (9.11.2.2 j) . 97
Figure 23 – Mechanical shock test apparatus (9.12.1) . 98
Figure 24 – Mechanical impact test apparatus (9.12.2.2) . 99

– 6 – IEC 62606:2013+AMD1:2017 CSV
© IEC 2017
Figure 25 – Striking element for pendulum impact test apparatus (9.12.2.2). 100
Figure 26 – Mounting support for sample for mechanical impact test (9.12.2.2). 101
Figure 27 – Example of mounting of unenclosed AFDD for mechanical impact test
(9.12.2.2) . 102
Figure 28 – Example of mounting of panel mounting type AFDD for the mechanical
impact test (9.12.2.2) . 103
Figure 29 – Application of force for mechanical test of rail mounted AFDD (9.12.2.3) . 104
Figure 30 – Ball-pressure test apparatus (9.13.2) . 104
Figure 31 – Surge current impulse 8/20 ms . 105
Figure 32 – Test circuit for the surge current test at AFDDs . 105
Figure 33 – Stabilizing period for reliability test (9.19.2.3) . 106
Figure 34 – Reliability test cycle (9.19.2.3) . 107
Figure 35 – Example for test circuit for verification of ageing of electronic components
(9.20) . 108
Figure 36 – Preparation of the cable specimens (9.9.2.6) . 109
Figure 37 – Example of arc voltage and current waveform obtained with cable
specimen . 109
Figure 38 – Test circuit for series arc in a three-phase system with balanced and
unbalanced load . 110
Figure 39 – Test configuration for masking tests for three-pole and four-pole AFDDs . 110
Figure C.1 – Test arrangement . 126
Figure C.2 – Grid . 127
Figure C.3 – Grid circuit . 127
Figure F.1 – Gap Measurement. 133
Figure F.2 – Shaker arc test table with Loose Terminals . 133
Figure F.3 – AFDD connected to the shaker arc table during test . 134
Figure IB.1 – Examples of pillar terminals . 137
Figure IB.2 – Examples of screw terminals and stud terminals . 138
Figure IB.3 – Examples of saddle terminals . 139
Figure IB.4 – Examples of lug terminals . 139
Figure IE-1 – Test apparatus for the verification of the minimum I t and I values to
p
be withstood by the AFDD . 146
Figure J.1 – Connecting samples . 152
Figure J.2 – Examples of screwless-type terminals . 154
Figure K.1 – Example of position of the thermocouple for measurement of the
temperature-rise . 158
Figure K.2 – Dimensions of male tabs . 159
Figure K.3 – Dimensions of round dimple detents (see Figure K.2) . 160
Figure K.4 – Dimensions of rectangular dimple detents (see Figure K.2) . 160
Figure K.5 – Dimensions of hole detents . 160
Figure K.6 – Dimensions of female connectors . 161
Figure L.1 – General arrangement for the test . 170
Figure L.2 – Example for the use of the terminals in the AFDD . 170
Figure L.3 – Example for the use of the terminals in the AFDD . 171
Figure L.4 – Example for the use of the terminals in the AFDD . 171

© IEC 2017
Figure L.5 – Example for the use of the terminals in the AFDD . 171
Figure L.6 – Example for the use of the terminals in the AFDD . 171

Table 1 – Limit values of break time for U = 230 V and 400 V AFDDs . 21
n
Table 2 – Limit values of break time for U = 120 V AFDDs . 21
n
Table 3 – Maximum allowed number of arcing half-cycles within 0,5 s for U 230 V
n
AFDDs and U = 120 V AFDDs . 21
n
Table 4 – Rated impulse withstand voltage as a function of the nominal voltage of the
installation . 22
Table 5 – Marking and position of marking . 23
Table 6 – Standard conditions for operation in service . 26
Table 7 – Minimum clearances and creepage distances (1 of 2). 30
Table 8 – Connectable cross-sections of copper conductors for screw-type terminals . 33
Table 9 – Temperature-rise values . 36
Table 10 – List of type tests . 40
Table 11 – Test copper conductors corresponding to the rated currents . 41
Table 12 – Screw thread diameters and applied torques . 42
Table 13 – Pulling forces . 44
Table 14 – Test voltage of auxiliary circuits . 47
Table 15 – Test voltage for verification of impulse withstand voltage . 50
Table 16 – Test voltage for verifying the suitability for isolation, referred to the rated
impulse withstand voltage of the AFDD and the altitude where the test is carried out . 50
Table 17 – Tests to be made to verify the behaviour of AFDDs under short-circuit
conditions . 64
Table 18 – Minimum values of l t and l . 65
p
Table 19 – Power factors for short-circuit tests . 67
Table 20 – Tests already covered in this standard . 81
Table 21 – Tests to be applied for EMC . 81
Table 22 – Preferred values of rated voltage . 19
Table A.1 – Test sequences for AFDDs classified according to 4.1.1 . 112
Table A.2 – Test sequences for AFDDs classified according to 4.1.2 . 114
Table A.3 – Test sequences for AFDDs classified according to 4.1.3 . 116
Table A.4 – Number of samples for full test procedure . 118
Table A.5 – Number of samples for simplified test procedure . 119
Table ID.1 – Test sequences during follow-up inspections . 141
Table ID.2 – Number of samples to be tested. 144
Table IE.1 – Indication of silver wire diameters as a function of rated currents and
short-circuit currents . 145
Table J.1 – Connectable conductors . 149
Table J.2 – Cross-sections of copper conductors connectable to screwless-type
terminals . 150
Table J.3 – Pull forces . 151
Table K.1 – Informative table on colour code of female connectors in relationship with
the cross section of the conductor . 156
Table K.2 – Overload test forces . 157

– 8 – IEC 62606:2013+AMD1:2017 CSV
© IEC 2017
Table K.3 – Dimensions of tabs . 158
Table K.4 – Dimensions of female connectors . 161
Table L.1 – Marking for terminals . 163
Table L.2 – Connectable cross-sections of aluminium conductors for screw-type
terminals . 164
Table L.3 – List of tests according to the material of conductors and terminals . 165
Table L.4 – Connectable conductors and their theoretical diameters . 165
Table L.5 – Cross sections (S) of aluminium test conductors corresponding to the
rated currents . 166
Table L.6 – Test conductor length . 167
Table L.7 – Equalizer and busbar dimensions . 167
Table L.8 – Test current as a function of rated current . 169
Table L.9 – Example of calculation for determining the average temperature
deviation D . 169

© IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
GENERAL REQUIREMENTS FOR ARC FAULT DETECTION DEVICES
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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This consolidated version of the official IEC Standard and its amendment has been prepared
for user convenience.
IEC 62606 edition 1.1 contains the first edition (2013-07) [documents 23E/785/FDIS and 23E/797/
RVD] and its corrigendum 1 (2013-11), and its amendment 1 (2017-02) [documents 23E/993/FDIS
and 23E/1003/RVD].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendment 1. Additions are in green text, deletions are in strikethrough red text.
A separate Final version with all changes accepted is available in this publication.

– 10 – IEC 62606:2013+AMD1:2017 CSV
© IEC 2017
International Standard IEC 62606 has been prepared by subcommittee 23E: Circuit-breakers
and similar equipment for household use, of IEC technical committee 23: Electrical
accessories.
This publication has been drafted in accordance with the ISO
...

IEC 62606 ®
Edition 1.2 2022-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
General requirements for arc fault detection and protection devices (AFDDs)

Exigences générales des dispositifs pour la détection et la protection de défaut
d'arcs (DPDA)
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IEC 62606 ®
Edition 1.2 2022-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
General requirements for arc fault detection and protection devices (AFDDs)

Exigences générales des dispositifs pour la détection et la protection de défaut

d'arcs (DPDA)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.01; 29.120.50 ISBN 978-2-8322-6105-7

IEC 62606 ®
Edition 1.2 2022-11
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
General requirements for arc fault detection and protection devices (AFDDs)

Exigences générales des dispositifs pour la détection et la protection de défaut
d'arcs (DPDA)
– 2 – IEC 62606:2013+AMD1:2017
+AMD2:2022 CSV © IEC 2022
CONTENTS
FOREWORD . 9
INTRODUCTION . 11
1 Scope . 12
2 Normative references . 13
3 Terms and definitions . 15
4 Classification . 18
4.1 According to the method of construction . 18
4.2 According to the method of mounting and connection . 18
4.3 According to the number of poles and current paths . 18
4.4 AFDD providing monitoring information . 18
5 Characteristics of AFDDs . 19
5.1 Summary of characteristics and conditions to mitigate the risk of fire . 19
5.2 Rated quantities and other characteristics . 19
5.2.1 Rated voltage . 19
5.2.2 Rated current (I ) . 19
n
5.2.3 Rated frequency . 19
5.2.4 Rated making and breaking capacity (I ) . 20
m
5.2.5 Rated making and breaking capacity on one pole (I ) . 20
m1
5.3 Standard and preferred values . 20
5.3.1 Preferred values of rated voltage (U ) . 20
n
5.3.2 Preferred values of rated current (I ) . 21
n
5.3.3 Preferred Standard values of rated frequency . 21
5.3.4 Minimum value of the rated making and breaking capacity (I ) . 21
m
5.3.5 Minimum value of the rated making and breaking capacity on one
pole (I ) . 21
m1
5.3.6 Standard and preferred values of the rated conditional short-circuit
current (I ) and standard and preferred values of the rated
nc
conditional short circuit current for one pole (I ) . 21
nc1
5.3.7 Limiting values of operating criteria for AFDDs for low and high arc
currents . 22
5.4 Standard value of rated impulse withstand voltage (U ) . 22
imp
5.5 Coordination with short-circuit protective devices (SCPDs) . 23
5.5.1 General . 23
5.5.2 Rated conditional short-circuit current (I ) and rated conditional
nc
short-circuit on one pole (I ) . 23
nc1
5.5.3 Operating characteristics of opening means for AFDDs according to
4.1.1 . 23
6 Marking and other product information . 24
6.1 Marking . 24
6.2 Additional marking for AFDDs according to 4.1.1 . 25
6.2.1 Marking of AFDDs . 25
6.2.2 Instructions for wiring and operation . 26
7 Standard conditions for operation in service and for installation . 26
7.1 Standard conditions . 26
7.2 Conditions of installation . 27
7.3 Pollution degree . 27
8 Requirements for construction and operation . 27

+AMD2:2022 CSV © IEC 2022
8.1 General . 27
8.2 Mechanical design . 28
8.2.1 General . 28
8.2.2 Mechanism . 29
8.2.3 Clearances and creepage distances (see Annex B) . 30
8.2.4 Screws, current-carrying parts and connections . 33
8.2.5 Terminals for external conductors . 33
8.3 Protection against electric shock . 35
8.4 Dielectric properties and isolating capability . 36
8.5 Temperature rise . 36
8.5.1 Temperature-rise limits . 36
8.5.2 Ambient air temperature . 37
8.6 Operating characteristics . 37
8.6.1 Operating characteristics of the protective device part . 37
8.6.2 Operating characteristics . 37
8.7 Mechanical and electrical endurance . 38
8.8 Performance at short-circuits currents . 38
8.9 Resistance to mechanical shock and impact . 38
8.10 Resistance to heat. 38
8.11 Resistance to abnormal heat and to fire . 38
8.12 Behaviour of AFDDs in case of overcurrents in the main circuit . 38
8.13 Behaviour of AFDDs in case of current surges caused by impulse voltages . 39
8.14 Reliability . 39
8.15 Electromagnetic compatibility (EMC) . 39
8.16 Masking test for correct operation behaviour in presence of various
appliances connected to the load side . 39
8.17 Performance of the AFD test device . 39
8.18 Performance in case of partial loss of supply connections . 40
9 Testing procedure . 40
9.1 General . 40
9.1.1 General testing procedure for the different type of AFDDs . 40
9.1.2 The characteristics of AFDDs are checked by means of type tests . 41
9.1.3 For certification purposes, type tests are carried out in test

sequences. . 42
9.1.4 Routine tests to be carried out by the manufacturer on each device . 42
9.2 Test conditions . 42
9.3 Test of indelibility of marking . 43
9.4 Test of reliability of screws, current-carrying parts and connections . 44
9.5 Test of reliability of terminals for external conductors . 45
9.6 Verification of protection against electric shock . 46
9.7 Test of dielectric properties . 47
9.7.1 General . 47
9.7.2 Resistance to humidity . 47
9.7.3 Insulation resistance of the main circuit . 47
9.7.4 Dielectric strength of the main circuit . 48
9.7.5 Insulation resistance and dielectric strength of auxiliary circuits . 49
9.7.6 Capability of control circuits connected to the main circuit in respect
of withstanding high d.c. voltages due to insulation measurements . 49
9.7.7 Verification of impulse withstand voltages (across clearances and
across solid insulation) and of leakage current across open contacts . 50

– 4 – IEC 62606:2013+AMD1:2017
+AMD2:2022 CSV © IEC 2022
9.8 Test of temperature-rise . 53
9.8.1 Ambient air temperature . 53
9.8.2 Test procedure . 54
9.8.3 Measurement of the temperature of parts . 54
9.8.4 Temperature-rise of a part . 54
9.9 Verification of the operating characteristics . 54
9.9.1 General . 54
9.9.2 Series arc fault tests . 54
9.9.3 Parallel arc fault tests . 58
9.9.4 Masking test, verification of correct operation . 60
9.9.5 Unwanted tripping test . 62
9.10 Verification of mechanical and electrical endurance . 64
9.10.1 General test conditions . 64
9.10.2 Test procedure . 64
9.10.3 Condition of the AFDD after test . 65
9.11 Verification of the behaviour of the AFDD under short-circuit conditions . 65
9.11.1 General . 65
9.11.2 Short-circuit tests for AFDDs according to 4.1.1 . 65
9.12 Verification of resistance to mechanical shock and impact . 73
9.12.1 Mechanical shock . 73
9.12.2 Mechanical impact . 74
9.13 Test of resistance to heat . 76
9.14 Test of resistance to abnormal heat and to fire . 77
9.15 Verification of the trip-free mechanism . 78
9.15.1 General test conditions . 78
9.15.2 Test procedure . 78
9.16 Test of resistance to rusting . 78
9.17 Verification of limiting values of the non-operating current under overcurrent
conditions . 79
9.18 Verification of behaviour of AFDDs in case of current surges caused by
impulse voltages . 79
9.18.1 General . 79
9.18.2 Verification of behaviour at surge currents up to 3 000 A (8/20 µs
surge current test) . 79
9.19 Verification of reliability . 80
9.19.1 General . 80
9.19.2 Climatic test . 80
9.19.3 Test with temperature of 40 °C . 81
9.20 Verification of ageing of electronic components . 82
9.21 Electromagnetic compatibility (EMC) . 82
9.21.1 General . 82
9.21.2 EMC tests covered by other clauses of the present standard .
9.21.3 EMC tests to be performed .
9.21.4 AFDDs Performance criteria .
9.21.2 Electromagnetic emission of AFDDs . 85
9.21.3 Electromagnetic immunity of AFDDs . 85
9.22 Verification of protection due to overvoltage due to a broken neutral in a
three phase system . 88
9.23 Verification of the behaviour in case of partial loss of supply connections . 88

+AMD2:2022 CSV © IEC 2022
Annex A (normative) Test sequence and number of samples to be submitted for
certification purposes . 116
Annex B (normative)  Determination of clearances and creepage distances . 125
Annex C (normative) Arrangement for the detection of the emission of ionized gases
during short-circuit tests . 130
Annex D (normative) Additional requirements and tests for AFDDs according to the
classification 4.1.3 designed to be assembled on site together with a main protective
device (circuit-breaker or RCCB or RCBO) . 133
Annex E (normative) Routine tests . 138
Annex F (informative) Description of the shaker arc test in 9.10.2 . 139
Annex IA (informative) Methods of determination of short-circuit power-factor . 141
Annex IB (informative) Examples of terminal designs . 143
Annex IC (informative) Correspondence between ISO and AWG copper conductors . 146
Annex ID (informative) Follow-up testing program for AFDDs . 147
Annex IE (informative) SCPDs for short-circuit tests . 151
Annex J (normative) Particular requirements for AFDDs with screwless type terminals
for external copper conductors . 153
Annex K (normative) Particular requirements for AFDDs with flat quick-connect
terminations . 161
Annex L (normative) Specific requirements for AFDDs with screw-type terminals for
external untreated aluminium conductors and with aluminium screw-type terminals for

use with copper or with aluminium conductors . 168
Bibliography . 178

Figure 1 – Thread forming tapping screw . 89
Figure 2 – Thread cutting tapping screw . 89
Figure 3 – Standard test finger (9.6) . 90
Figure 4 – Test circuit for series arc fault tests . 91
Figure 5 – Arc generator . 91
Figure 6 – Test circuit for parallel arc fault tests. 91
Figure 7 – Test circuit for parallel arc cable cutting test . 92
Figure 8 – Test apparatus . 92
Figure 9 – Test for verification of correct operation in case of parallel arc to ground . 92
Figure 10 – Test circuit for masking tests (inhibition and disturbing loads) . 92
Figure 11 – Test configuration for masking tests . 93
Figure 12 – EMI filter 1 for masking tests . 93
Figure 13 – EMI filter 2 for masking tests . 94
Figure 14 – EMI filter description installed in Figure 13 . 94
Figure 15 – Test circuit for masking tests with line impedance . 94
Figure 16 – Cross talk test . 95
Figure 17 – Controlled current test circuit Void . 96
Figure 18 – Controlled current with delay angle 45 °, 90 ° and 135 ° Void . 96
Figure 19 – Typical diagram for all short circuit tests except for 9.11.2.4 c) . 99
Figure 20 – Typical diagram for short circuit tests ((9.11.2.4.c) . 101
Figure 21 – Detail of impedance Z, Z and Z . 102
1 2
Figure 22 – Example of calibration record for short-circuit test (9.11.2.2 j) . 102

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+AMD2:2022 CSV © IEC 2022
Figure 23 – Mechanical shock test apparatus (9.12.1) . 103
Figure 24 – Mechanical impact test apparatus (9.12.2.2) . 104
Figure 25 – Striking element for pendulum impact test apparatus (9.12.2.2). 105
Figure 26 – Mounting support for sample for mechanical impact test (9.12.2.2). 106
Figure 27 – Example of mounting of unenclosed AFDD for mechanical impact test
(9.12.2.2) . 107
Figure 28 – Example of mounting of panel mounting type AFDD for the mechanical

impact test (9.12.2.2) . 108
Figure 29 – Application of force for mechanical test of rail mounted AFDD (9.12.2.3) . 109
Figure 30 – Ball-pressure test apparatus (9.13.2) . 109
Figure 31 – Surge current impulse 8/20 µs . 110
Figure 32 – Test circuit for the surge current test at AFDDs . 110
Figure 33 – Stabilizing period for reliability test (9.19.2.3) . 111
Figure 34 – Reliability test cycle (9.19.2.3) . 112
Figure 35 – Example for test circuit for verification of ageing of electronic components
(9.20) . 113
Figure 36 – Preparation of the cable specimens (9.9.2.6) . 114
Figure 37 – Example of arc voltage and current waveform obtained with cable
specimen . 114
Figure 38 – Test circuit for series arc in a three-phase system with balanced and
unbalanced load . 115
Figure 39 – Test configuration for masking tests for three-pole and four-pole AFDDs . 115
Figure C.1 – Test arrangement . 131
Figure C.2 – Grid . 132
Figure C.3 – Grid circuit . 132
Figure F.1 – Gap Measurement. 139
Figure F.2 – Shaker arc test table with Loose Terminals . 139
Figure F.3 – AFDD connected to the shaker arc table during test . 140
Figure IB.1 – Examples of pillar terminals . 143
Figure IB.2 – Examples of screw terminals and stud terminals . 144
Figure IB.3 – Examples of saddle terminals . 145
Figure IB.4 – Examples of lug terminals . 145
Figure IE-1 – Test apparatus for the verification of the minimum I t and I values to
p
be withstood by the AFDD . 152
Figure J.1 – Connecting samples . 158
Figure J.2 – Examples of screwless-type terminals . 160
Figure K.1 – Example of position of the thermocouple for measurement of the
temperature-rise . 164
Figure K.2 – Dimensions of male tabs . 165
Figure K.3 – Dimensions of round dimple detents (see Figure K.2) . 166
Figure K.4 – Dimensions of rectangular dimple detents (see Figure K.2) . 166
Figure K.5 – Dimensions of hole detents . 166
Figure K.6 – Dimensions of female connectors . 167
Figure L.1 – General arrangement for the test . 176
Figure L.2 – Example for the use of the terminals in the AFDD . 176

+AMD2:2022 CSV © IEC 2022
Figure L.3 – Example for the use of the terminals in the AFDD . 177
Figure L.4 – Example for the use of the terminals in the AFDD . 177
Figure L.5 – Example for the use of the terminals in the AFDD . 177
Figure L.6 – Example for the use of the terminals in the AFDD . 177

Table 1 – Limit values of break time for U = 230 V and 400 V AFDDs . 22
n
Table 2 – Limit values of break time for U = 120 V AFDDs . 22
n
Table 3 – Maximum allowed number of arcing half-cycles within 0,5 s
for U 230 V AFDDs and U = 120 V AFDDs . 22
n n
Table 4 – Rated impulse withstand voltage as a function of the nominal voltage of the
installation . 23
Table 5 – Marking and position of marking . 24
Table 6 – Standard conditions for operation in service . 27
Table 7 – Minimum clearances and creepage distances (1 of 2). 31
Table 8 – Connectable cross-sections of copper conductors for screw-type terminals . 34
Table 9 – Temperature-rise values . 37
Table 10 – List of type tests . 42
Table 11 – Test copper conductors corresponding to the rated currents . 43
Table 12 – Screw thread diameters and applied torques . 44
Table 13 – Pulling forces . 45
Table 14 – Test voltage of auxiliary circuits . 49
Table 15 – Test voltage for verification of impulse withstand voltage . 51
Table 16 – Test voltage for verifying the suitability for isolation, referred to the rated
impulse withstand voltage of the AFDD and the altitude where the test is carried out . 52
Table 17 – Tests to be made to verify the behaviour of AFDDs under short-circuit
conditions . 66
Table 18 – Minimum values of l t and l . 67
p
Table 19 – Power factors for short-circuit tests . 68
Table 20 – Tests already covered in this standard .
Table 21 – Tests to be applied for EMC .
Table 21 – Immunity tests . 85
Table 22 – Preferred values of rated voltage . 20
Table A.1 – Test sequences for AFDDs classified according to 4.1.1 . 117
Table A.2 – Test sequences for AFDDs classified according to 4.1.2 . 119
Table A.3 – Test sequences for AFDDs classified according to 4.1.3 . 121
Table A.4 – Number of samples for full test procedure . 123
Table A.5 – Number of samples for simplified test procedure . 124
Table ID.1 – Test sequences during follow-up inspections . 147
Table ID.2 – Number of samples to be tested. 150
Table IE.1 – Indication of silver wire diameters as a function of rated currents and
short-circuit currents . 151
Table J.1 – Connectable conductors . 155
Table J.2 – Cross-sections of copper conductors connectable to screwless-type
terminals . 156
Table J.3 – Pull forces . 157

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+AMD2:2022 CSV © IEC 2022
Table K.1 – Informative table on colour code of female connectors in relationship with
the cross section of the conductor . 162
Table K.2 – Overload test forces . 163
Table K.3 – Dimensions of tabs . 164
Table K.4 – Dimensions of female connectors . 167
Table L.1 – Marking for terminals . 169
Table L.2 – Connectable cross-sections of aluminium conductors for screw-type

terminals . 170
Table L.3 – List of tests according to the material of conductors and terminals . 171
Table L.4 – Connectable conductors and their theoretical diameters . 171
Table L.5 – Cross sections (S) of aluminium test conductors corresponding to the
rated currents . 172
Table L.6 – Test conductor length . 173
Table L.7 – Equalizer and busbar dimensions . 173
Table L.8 – Test current as a function of rated current . 175
Table L.9 – Example of calculation for determining the average temperature
deviation D . 175

+AMD2:2022 CSV © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION

___________
GENERAL REQUIREMENTS FOR ARC FAULT DETECTION AND
PROTECTION DEVICES (AFDDs)
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 62606 edition 1.2 contains the first edition (2013-07) [documents 23E/785/FDIS and
23E/797/RVD] and its corrigendum 1 (2013-11), its amendment 1 (2017-02) [documents
23E/993/FDIS and 23E/1003/RVD], and its amendment 2 (2022-11) [documents
23E/1267/FDIS and 23E/1304/RVD] and its corrigendum 1 (2023-03).
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendments 1 and 2. Additions are in green text, deletions are in
strikethrough red text. A separate Final version with all changes accepted is available
in this publication.
– 10 – IEC 62606:2013+AMD1:2017
+AMD2:2022 CSV © IEC 2022
International Standard IEC 62606 has been prepared by subcommittee 23E: Circuit-breakers
and similar equipment for household use, of IEC technical committee 23: Electrical
accessories.
This
...