IEC 61009-1:2010

IEC 61009-1 ®
Edition 3.0 2010-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Residual current operated circuit-breakers with integral overcurrent protection
for household and similar uses (RCBOs) –
Part 1: General rules
Interrupteurs automatiques à courant différentiel résiduel avec dispositif de
protection contre les surintensités incorporé pour usages domestiques et
analogues (DD) –
Partie 1: Règles générales
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IEC 61009-1 ®
Edition 3.0 2010-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Residual current operated circuit-breakers with integral overcurrent protection
for household and similar uses (RCBOs) –
Part 1: General rules
Interrupteurs automatiques à courant différentiel résiduel avec dispositif de
protection contre les surintensités incorporé pour usages domestiques et
analogues (DD) –
Partie 1: Règles générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XG
CODE PRIX
ICS 29.120.50 ISBN 978-2-88910-399-7
– 2 – 61009-1 © IEC:2010
CONTENTS
FOREWORD.9
INTRODUCTION.11
1 Scope.12
2 Normative references .13
3 Terms and definitions .14
3.1 Definitions relating to currents flowing from live parts to earth .14
3.2 Definitions relating to the energization of a residual current circuit-breaker .15
3.3 Definitions relating to the operation and functions of residual current circuit-
breakers.15
3.4 Definitions relating to values and ranges of energizing quantities .18
3.5 Definitions relating to values and ranges of influencing quantities .22
3.6 Definitions relating to terminals .23
3.7 Definitions relating to conditions of operation .24
3.8 Definitions relating to constructional elements.25
3.9 Definitions relating to tests .27
3.10 Definitions relating to insulation coordination.27
4 Classification.29
4.1 According to the method of operation .29
4.1.1 RCBO functionally independent of line voltage (see 3.3.8).29
4.1.2 RCBO functionally dependent on line voltage (see 3.3.9) .29
4.2 According to the type of installation.29
4.3 According to the number of poles and current paths .29
4.4 According to the possibility of adjusting the residual operating current .29
4.5 According to resistance to unwanted tripping due to voltage surges .30
4.6 According to behaviour in presence of d.c. components .30
4.7 According to time-delay (in presence of a residual current) .30
4.8 According to the protection against external influences .30
4.9 According to the method of mounting .30
4.10 According to the method of connection.30
4.11 According to the instantaneous tripping current (see 3.4.18) .30
4.12 According to the I²t characteristic .30
5 Characteristics of RCBOs.30
5.1 Summary of characteristics .30
5.2 Rated quantities and other characteristics .31
5.2.1 Rated voltage .31
5.2.2 Rated current (I ) .31
n
5.2.3 Rated residual operating current (I ) .32
Δn
5.2.4 Rated residual non-operating current (I ) .32
Δno
5.2.5 Rated frequency .32
5.2.6 Rated short-circuit capacity (I ) .32
cn
5.2.7 Rated residual making and breaking capacity (I ).32
Δm
5.2.8 RCBO type S.32
5.2.9 Operating characteristics in case of residual currents with d.c.
components.32
5.3 Standard and preferred values .32
5.3.1 Preferred values of rated voltage (U ) .32
n
61009-1 © IEC:2010 – 3 –
5.3.2 Preferred values of rated current (I ) .33
n
5.3.3 Standard values of rated residual operating current (I ) .33
Δn
5.3.4 Standard value of residual non-operating current (I ) .33
Δno
5.3.5 Standard values of rated frequency .33
5.3.6 Values of rated short-circuit capacity .34
5.3.7 Minimum value of the rated residual making and breaking capacity
(I ) .34
Δm
5.3.8 Limiting values of break time and non-actuating time for RCBO of
type AC and A .34
5.3.9 Standard ranges of overcurrent instantaneous tripping .35
5.3.10 Standard values of rated impulse withstand voltage (U ) .36
imp
6 Marking and other product information.36
7 Standard conditions for operation in service and for installation.38
7.1 Standard conditions.38
7.2 Conditions of installation .39
7.3 Pollution degree .39
8 Requirements for construction and operation.39
8.1 Mechanical design.39
8.1.1 General .39
8.1.2 Mechanism .40
8.1.3 Clearances and creepage distances (see also Annex B).41
8.1.4 Screws, current-carrying parts and connections.43
8.1.5 Terminals for external conductors.44
8.1.6 Non-interchangeability.46
8.2 Protection against electric shock .46
8.3 Dielectric properties and isolating capability .47
8.4 Temperature-rise.47
8.4.1 Temperature-rise limits.47
8.4.2 Ambient air temperature .48
8.5 Operating characteristics.48
8.5.1 Under residual current conditions .48
8.5.2 Under overcurrent conditions.48
8.6 Mechanical and electrical endurance.50
8.7 Performance at short-circuit currents.50
8.8 Resistance to mechanical shock and impact.50
8.9 Resistance to heat .50
8.10 Resistance to abnormal heat and to fire .50
8.11 Test device.50
8.12 Requirements for RCBOs functionally dependent on line voltage.51
8.13 Behaviour of RCBOs in case of a single-phase overcurrent through a three-
pole or four-pole RCBO .51
8.14 Behaviour of RCBOs in case of current surges caused by impulse voltages .51
8.15 Behaviour of RCBOs in case of earth fault currents comprising a d.c.
component .51
8.16 Reliability .52
8.17 Electromagnetic compatibility (EMC) .52
9 Tests .52
9.1 General .52
9.2 Test conditions.53

– 4 – 61009-1 © IEC:2010
9.3 Test of indelibility of marking .54
9.4 Test of reliability of screws, current-carrying parts and connections .54
9.5 Test of reliability of terminals for external conductors .55
9.6 Verification of protection against electric shock .57
9.7 Test of dielectric properties .57
9.7.1 Resistance to humidity .57
9.7.2 Insulation resistance of the main circuit .58
9.7.3 Dielectric strength of the main circuit.59
9.7.4 Insulation resistance and dielectric strength of auxiliary circuits .59
9.7.5 Secondary circuit of detection transformers .60
9.7.6 Capability of control circuits connected to the main circuit
withstanding high d.c. voltages due to insulation measurements.60
9.7.7 Verification of impulse withstand voltages (across clearances and
across solid insulation) and of leakage current across open contacts .61
9.8 Test of temperature-rise .63
9.8.1 Ambient air temperature .63
9.8.2 Test procedure .63
9.8.3 Measurement of the temperature of parts .63
9.8.4 Temperature-rise of a part .64
9.9 Verification of the operating characteristic .64
9.9.1 Verification of the operating characteristic under residual current
conditions.64
9.9.2 Verification of the operating characteristic under overcurrent
conditions.66
9.10 Verification of mechanical and electrical endurance .67
9.10.1 General test conditions.67
9.10.2 Test procedure .67
9.10.3 Condition of the RCBO after test .68
9.11 Verification of the trip-free mechanism .68
9.11.1 General test conditions.68
9.11.2 Test procedure .68
9.12 Short-circuit tests .69
9.12.1 General conditions for test .69
9.12.2 Test circuit for short-circuit performance .69
9.12.3 Values of test quantities .71
9.12.4 Tolerances on test quantities.71
9.12.5 Power factor of the test circuit .71
9.12.6 Measurement and verification of I t and of the peak current (I ) .72
p
9.12.7 Calibration of the test circuit.72
9.12.8 Interpretation of records .72
9.12.9 Condition of the RCBO for test .72
9.12.10 Behaviour of the RCBO during short-circuit tests.73
9.12.11 Test procedure .73
9.12.12 Verification of the RCBO after short-circuit test .77
9.12.13 Verification of the rated residual making and breaking capacity (I ) .78
Δm
9.13 Verification of resistance to mechanical shock and impact.79
9.13.1 Mechanical shock .79
9.13.2 Mechanical impact.80
9.14 Test of resistance to heat .82
9.15 Test of resistance to abnormal heat and to fire .83

61009-1 © IEC:2010 – 5 –
9.16 Verification of the operation of the test device at the limits of rated voltage .84
9.17 Verification of the behaviour of RCBOs functionally dependent on line
voltage, classified under 4.1.2.1, in case of failure of the line voltage.84
9.17.1 Determination of the limiting value of the line voltage (U ) .84
x
9.17.2 Verification of the automatic opening in case of failure of the line
voltage .84
9.17.3 Verification of the correct operation, in presence of a residual
current, for RCBOs opening with delay in case of failure of the line
voltage .85
9.17.4 Verification of correct operation of RCBOs with three or four current
paths, in presence of a residual current, the neutral and one line
terminal only being energized .85
9.17.5 Verification of the reclosing function of automatically reclosing
RCBOs .85
9.18 Verification of the limiting value of overcurrent in case of a single-phase load
through a three-pole or four-pole RCBO .85
9.19 Verification of behaviour of RCBOs in case of current surges caused by
impulse voltages .86
9.19.1 Current surge test for all RCBOs (0,5 μs/100 kHz ring wave test) .86
9.19.2 Verification of behaviour at surge currents up to 3 000 A (8/20 μs
surge current test) .86
9.20 Verification of resistance of the insulation against an impulse voltage .87
9.21 Verification of correct operation of residual currents with d.c. components .88
9.21.1 Type A residual current devices.88
9.22 Verification of reliability .89
9.22.1 Climatic test .89
9.22.2 Test with temperature of 40 °C .91
9.23 Verification of ageing of electronic components.91
9.24 Electromagnetic compatibility (EMC) .91
Annex A (normative) Test sequence and number of samples to be submitted for
certification purposes.118
Annex B (normative) Determination of clearances and creepage distances . 124
Annex C (normative) Arrangement for the detection of the emission of ionized gases
during short-circuit tests .126
Annex D (normative) Routine tests.129
Annex E (normative) Special requirements for auxiliary circuits for safety extra-low
voltage.130
Annex F (normative) Coordination between RCBOs and separate fuses associated in
the same circuit .131
Annex G (normative) Additional requirements and tests for RCBOs consisting of a
circuit-breaker and a residual current unit designed for assembly on site. 132
Annex H (informative) Void .136
Annex IA (informative) Methods for determination of short-circuit power-factor .137
Annex IB (informative) Glossary of symbols .139
Annex IC (informative) Examples of terminals.140
Annex ID (informative) Correspondence between ISO and AWG copper conductors . 143
Annex IE (informative) Follow-up testing programme for RCBOs. 144
Bibliography.148

Figure 1 – Thread-forming tapping screw (3.6.10).92

– 6 – 61009-1 © IEC:2010
Figure 2 – Thread-cutting tapping screw (3.6.11) .92
Figure 3 – Jointed test finger (9.6) .93
Figure 4 – Test circuit for the verification of
– operating characteristics (9.9.1)
– trip-free mechanism (9.11)
– behaviour in case of failure of line voltage (9.17.3 and 9.17.4) for RCBOs
functionally dependent on line voltage .94
Figure 5 – Test circuit for the verification of the correct operation of RCBOs, in the
case of residual pulsating direct currents .95
Figure 6 – Test circuit for the verification of the correct operation in case of residual
pulsating direct currents in presence of a standing smooth direct current of 0,006 A.96
Figure 7 – Test circuit for the verification of the suitability of an RCBO for use in IT
systems (9.12.11.2.2) .98
Figure 8 – Test circuit for the verification of the rated short-circuit capacity of a single-
pole RCBO with two-current paths (9.12) .99
Figure 9 – Test circuit for the verification of the rated short-circuit capacity of a two-
pole RCBO, in case of a single-phase circuit (9.12) .100
Figure 10 – Test circuit for the verification of the rated short-circuit capacity of a three-
pole RCBO on a three-phase circuit (9.12). 101
Figure 11 – Test circuit for the verification of the rated short-circuit capacity of a three-
pole RCBO with four current paths on a three-phase circuit with neutral (9.12) . 102
Figure 12 – Test circuit for the verification of the rated short-circuit capacity of a four-
pole RCBO on a three-phase circuit with neutral (9.12). 103
Figure 13 – Example of calibration record for short-circuit test. 104
Figure 14 – Mechanical shock test apparatus (9.13.1) . 105
Figure 15 – Mechanical impact test apparatus (9.13.2.1) . 106
Figure 16 – Striking element for pendulum impact test apparatus (9.13.2.1) . 107
Figure 17 – Mounting support for sample for mechanical impact test (9.13.2.1) . 108
Figure 18 – Example of mounting an unenclosed RCBO for mechanical impact test
(9.13.2.1).109
Figure 19 – Example of mounting of panel mounting type RCBO for the mechanical
impact test (9.13.2.1) .110
Figure 20 – Application of force for mechanical impact test of rail mounted RCBO
(9.13.2.2).111
Figure 21 – Ball-pressure test apparatus (9.14.2) .111
Figure 22 – Test circuit for the verification of the limiting value of overcurrent in case of
a single-phase load through a three-pole or four-pole RCBO (9.18) . 112
Figure 23 – Stabilizing period for reliability test (9.22.1.3).113
Figure 24 – Reliability test cycle (9.22.1.3) .114
Figure 25 – Example of a test circuit for verification of ageing of electronic
components (9.23) .115
Figure 26 – Damped oscillator current wave, 0,5 μs/100 kHz .115
Figure 27 – Test circuit for the ring wave test at RCBOs .116
Figure 28 – Surge current impulse 8/20 μs.116
Figure 29 – Test circuit for the surge current test at RCBOs .117
Figure B.1 to B.10 – Illustrations of the application of creepage distances . 125
Figure C.1 – Test arrangement .127
Figure C.2 – Grid .128

61009-1 © IEC:2010 – 7 –
Figure C.3 – Grid circuit.128
Figure IC.1 – Examples of pillar terminals.140
Figure IC.2 – Example of screw terminals and stud terminals. 141
Figure IC.3 – Example of saddle terminals.142
Figure IC.4 – Examples of lug terminals.142

Table 1 – Standard values of rated short-circuit capacity .34
Table 2 – Limiting values of break time and non-actuating time for alternating residual
currents (r.m.s. values) for type AC and A RCBO.34
Table 3 – Maximum values of break time for half-wave residual currents (r.m.s. values)
for type A RCBO .35
Table 4 – Ranges of overcurrent instantaneous tripping.36
Table 5 – Rated impulse withstand voltage as a function of the nominal voltage of the
installation .36
Table 6 – Standard conditions for operation in service .39
Table 7 – Minimum clearances and creepage distances.42
Table 8 – Connectable cross-sections of copper conductors for screw-type terminals .45
Table 9 – Temperature-rise values.48
Table 10 – Time-current operating characteristics.49
Table 11 – Requirements for RCBOs functionally dependent on line voltage.51
Table 12 – List of type tests .52
Table 13 – Test copper conductors corresponding to the rated currents.53
Table 14 – Screw thread diameters and applied torques .54
Table 15 – Pulling forces .56
Table 16 – Conductor dimensions .56
Table 17 – Test voltage of auxiliary circuits .60
Table 18 – Test voltage across the open contacts for verifying the suitability for
isolation, referred to the rated impulse withstand voltage of the RCBO and the altitude
where the test is carried out.61
Table 19 – Test voltage for verification of impulse withstand voltage for the parts not
tested in 9.7.7.1.63
Table 20 – List of short-circuit tests .69
Table 21 – Power factor ranges of the test circuit .71
Table 22 – Ratio between service short-circuit capacity (I ) and rated short-circuit
cs
capacity (I ) – (factor k).76
cn
Table 23 – Test procedure for I in the case of single- and two-pole RCBOs .76
cs
Table 24 – Test procedure for I in the case of three- and four-pole RCBOs .77
cs
Table 25 – Test procedure for I .77
cn
Table 26 – Tripping current ranges for type A RCBOs.88
Table 27 – Tests to be applied for EMC .92
Table A.1 – Test sequences.118
Table A.2 – Number of samples for full test procedure .120
Table A.3 – Number of samples for simplified test procedure. 122
Table A.4 – Test sequences for RCBOs having different instantaneous tripping
currents .123
Table A.5 – Test sequences for RCBOs of different classification according to 4.6 .123

– 8 – 61009-1 © IEC:2010
Table IE.1 – Test sequences during follow-up inspections .144
Table IE.2 – Number of samples to be tested.147

61009-1 © IEC:2010 – 9 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RESIDUAL CURRENT OPERATED CIRCUIT-BREAKERS
WITH INTEGRAL OVERCURRENT PROTECTION
FOR HOUSEHOLD AND SIMILAR USES (RCBOs) –

Part 1: General rules
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
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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
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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.
International Standard IEC 61009-1 has been prepared by subcommittee 23E: Circuit-
breakers and similar equipment for household use, of IEC technical committee 23: Electrical
accessories.
This third edition cancels and replaces the second edition, published in 1996, amendment 1
(2002) and amendment 2 (2006). It constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– complete revision of EMC sequences, including the new test T.2.6, already approved in
IEC 61543;
– clarification of RCDs current/time characteristics reported in Tables 2 and 3;
– revision of test procedure for I between 5 A and 200 A;
Δn
– 10 – 61009-1 © IEC:2010
– tests for the use of RCBOs in IT systems;
– testing procedure regarding the 6mA d.c. current superimposed to the fault current;
– improvement highlighting RCDs with multiple sensitivity;
– some alignments with IEC 60898-1.
The text of this standard is based on the following documents:
FDIS Report on voting
23E/682/FDIS 23E/686/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 61009 series, under the general title Residual current operated
circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs),
can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
61009-1 © IEC:2010 – 11 –
INTRODUCTION
This part includes definitions, requirements and tests covering all types of RCBOs. For
applicability to a specific type, this part applies in conjunction with the relevant part, as
follows:
Part 2-1: Applicability of the general rules to RCBOs functionally independent of line voltage.
Part 2-2: Applicability of the general rules to RCBOs functionally dependent on line voltage.

– 12 – 61009-1 © IEC:2010
RESIDUAL CURRENT OPERATED CIRCUIT-BREAKERS
WITH INTEGRAL OVERCURRENT PROTECTION
FOR HOUSEHOLD AND SIMILAR USES (RCBOs) –

Part 1: General rules
1 Scope
This International Standard applies to residual current operated circuit-breakers with integral
overcurrent protection functionally independent of, or functionally dependent on, line voltage
for household and similar uses (hereafter referred to as RCBOs), for rated voltages not
exceeding 440 V a.c. with rated frequencies of 50 Hz, 60 Hz or 50/60 Hz and rated currents
not exceeding 125 A and rated short-circuit capacities not exceeding 25 000 A for operation at
50 Hz or 60 Hz.
These devices are intended to protect people against indirect contact, the exposed conductive
parts of the installation being connected to an appropriate earth electrode and to protect
against overcurrents the wiring installations of buildings and similar applications. They may be
used to provide protection against fire hazards due to a persistent earth fault current, without
the operation of the overcurrent protective device.
RCBOs having a rated residual operating current not exceeding 30 mA are also used as a
means for additional protection in the case of failure of the protective means against electric
shock.
This standard applies to devices performing simultaneously the function of detection of the
residual current, of comparison of the value of this current with the residual operating value
and of opening
...

IEC 61009-1 ®
Edition 3.2 2013-09
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Residual current operated circuit-breakers with integral overcurrent protection
for household and similar uses (RCBOs) –
Part 1: General rules
Interrupteurs automatiques à courant différentiel résiduel avec dispositif de
protection contre les surintensités incorporé pour usages domestiques et
analogues (DD) –
Partie 1: Règles générales
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

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IEC 61009-1 ®
Edition 3.2 2013-09
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Residual current operated circuit-breakers with integral overcurrent protection

for household and similar uses (RCBOs) –

Part 1: General rules
Interrupteurs automatiques à courant différentiel résiduel avec dispositif de

protection contre les surintensités incorporé pour usages domestiques et

analogues (DD) –
Partie 1: Règles générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50 ISBN 978-2-8322-1101-4

IEC 61009-1 ®
Edition 3.2 2013-09
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Residual current operated circuit-breakers with integral overcurrent protection
for household and similar uses (RCBOs) –
Part 1: General rules
Interrupteurs automatiques à courant différentiel résiduel avec dispositif de
protection contre les surintensités incorporé pour usages domestiques et
analogues (DD) –
Partie 1: Règles générales
– 2 – 61009-1  IEC:2010+A1:2012
+A2:2013
CONTENTS
FOREWORD . 10
INTRODUCTION . 12

1 Scope . 13
2 Normative references . 15
3 Terms and definitions . 16
3.1 Definitions relating to currents flowing from live parts to earth . 16
3.2 Definitions relating to the energization of a residual current circuit-breaker . 16
3.3 Definitions relating to the operation and functions of residual current circuit-
breakers . 17
3.4 Definitions relating to values and ranges of energizing quantities . 20
3.5 Definitions relating to values and ranges of influencing quantities . 24
3.6 Definitions relating to terminals . 24
3.7 Definitions relating to conditions of operation . 26
3.8 Definitions relating to constructional elements . 27
3.9 Definitions relating to tests . 28
3.10 Definitions relating to insulation coordination . 28
4 Classification . 30
4.1 According to the method of operation . 30
4.1.1 RCBO functionally independent of line voltage (see 3.3.8) . 30
4.1.2 RCBO functionally dependent on line voltage (see 3.3.9) . 30
4.2 According to the type of installation . 31
4.3 According to the number of poles and current paths . 31
4.4 According to the possibility of adjusting the residual operating current . 31
4.5 According to resistance to unwanted tripping due to voltage surges . 31
4.6 According to behaviour in presence of d.c. components . 31
4.7 According to time-delay (in presence of a residual current) . 31
4.8 According to the protection against external influences . 31
4.9 According to the method of mounting . 32
4.10 According to the method of connection . 32
4.11 According to the instantaneous tripping current (see 3.4.18) . 32
4.12 According to the I²t characteristic . 32
4.13 According to the type of terminals . 32
5 Characteristics of RCBOs . 32
5.1 Summary of characteristics . 32
5.2 Rated quantities and other characteristics . 33
5.2.1 Rated voltage . 33
5.2.2 Rated current (I ) . 33
n
5.2.3 Rated residual operating current (I ) . 34
∆n
5.2.4 Rated residual non-operating current (I ) . 34
∆no
5.2.5 Rated frequency . 34
5.2.6 Rated short-circuit capacity (I ) . 34
cn
5.2.7 Rated residual making and breaking capacity (I ) . 34
∆m
5.2.8 RCBO type S . 34
5.2.9 Operating characteristics in case of residual currents with d.c.
components . 34
5.3 Standard and preferred values . 34

61009-1  IEC:2010+A1:2012 – 3 –
+A2:2013
5.3.1 Preferred values of rated voltage (U ) . 34
n
5.3.2 Preferred values of rated current (I ) . 35
n
5.3.3 Standard values of rated residual operating current (I ) . 35
∆n
5.3.4 Standard value of residual non-operating current (I ) . 35
∆no
5.3.5 Standard values of rated frequency . 35
5.3.6 Values of rated short-circuit capacity . 36
5.3.7 Minimum value of the rated residual making and breaking capacity
(I ) . 36
∆m
5.3.8 Limiting values of break time and non-actuating time for RCBO of
type AC and A . 36
5.3.9 Standard ranges of overcurrent instantaneous tripping . 37
5.3.10 Standard values of rated impulse withstand voltage (U ) . 38
imp
6 Marking and other product information. 38
7 Standard conditions for operation in service and for installation . 40
7.1 Standard conditions . 40
7.2 Conditions of installation . 41
7.3 Pollution degree . 41
8 Requirements for construction and operation . 41
8.1 Mechanical design . 41
8.1.1 General . 41
8.1.2 Mechanism . 42
8.1.3 Clearances and creepage distances (see also Annex B) . 43
8.1.4 Screws, current-carrying parts and connections . 46
8.1.5 Terminals for external conductors . 47
8.1.6 Non-interchangeability . 50
8.2 Protection against electric shock . 50
8.3 Dielectric properties and isolating capability . 51
8.4 Temperature-rise . 51
8.4.1 Temperature-rise limits . 51
8.4.2 Ambient air temperature . 52
8.5 Operating characteristics . 52
8.5.1 Under residual current conditions . 52
8.5.2 Under overcurrent conditions . 52
8.6 Mechanical and electrical endurance . 54
8.7 Performance at short-circuit currents . 54
8.8 Resistance to mechanical shock and impact . 54
8.9 Resistance to heat . 54
8.10 Resistance to abnormal heat and to fire . 54
8.11 Test device. 54
8.12 Requirements for RCBOs functionally dependent on line voltage . 55
8.13 Behaviour of RCBOs in case of a single-phase overcurrent through a three-
pole or four-pole RCBOVoid . 55
8.14 Behaviour of RCBOs in case of current surges caused by impulse voltages . 55
8.15 Behaviour of RCBOs in case of earth fault currents comprising a d.c.
component . 55
8.16 Reliability . 56
8.17 Electromagnetic compatibility (EMC) . 56

– 4 – 61009-1  IEC:2010+A1:2012
+A2:2013
9 Tes t s . 56
9.1 General . 56
9.2 Test conditions . 57
9.3 Test of indelibility of marking. 58
9.4 Test of reliability of screws, current-carrying parts and connections . 58
9.5 Test of reliability of screw-type terminals for external copper conduc tors. 59
9.6 Verification of protection against electric shock . 62
9.7 Test of dielectric properties . 62
9.7.1 Resistance to humidity . 62
9.7.2 Insulation resistance of the main circuit . 63
9.7.3 Dielectric strength of the main circuit . 64
9.7.4 Insulation resistance and dielectric strength of auxiliary circuits . 64
9.7.5 Secondary circuit of detection transformers . 65
9.7.6 Capability of control circuits connected to the main circuit
withstanding high d.c. voltages due to insulation measurements . 65
9.7.7 Verification of impulse withstand voltages (across clearances and
across solid insulation) and of leakage current across open contacts . 66
9.8 Test of temperature-rise . 71
9.8.1 Ambient air temperature . 71
9.8.2 Test procedure . 71
9.8.3 Measurement of the temperature of parts . 71
9.8.4 Temperature-rise of a part . 71
9.9 Verification of the operating characteristic . 72
9.9.1 Verification of the operating characteristics under residual current
conditions . 72
9.9.2 Verification of the operating characteristic under overcurrent
conditions . 75
9.10 Verification of mechanical and electrical endurance . 77
9.10.1 General test conditions . 77
9.10.2 Test procedure . 77
9.10.3 Condition of the RCBO after test . 78
9.11 Verification of the trip-free mechanism . 78
9.11.1 General test conditions . 78
9.11.2 Test procedure . 78
9.12 Short-circuit tests . 78
9.12.1 General conditions for test . 78
9.12.2 Test circuit for short-circuit performance . 79
9.12.3 Values of test quantities . 80
9.12.4 Tolerances on test quantities . 81
9.12.5 Power factor of the test circuit . 81
9.12.6 Measurement and verification of I t and of the peak current (I ) . 81
p
9.12.7 Calibration of the test circuit . 81
9.12.8 Interpretation of records . 82
9.12.9 Condition of the RCBO for test . 82
9.12.10 Behaviour of the RCBO during short-circuit tests . 83
9.12.11 Test procedure . 83
9.12.12 Verification of the RCBO after short-circuit test . 87
9.12.13 Verification of the rated residual making and breaking capacity (I ) . 88
m
61009-1  IEC:2010+A1:2012 – 5 –
+A2:2013
9.13 Verification of resistance to mechanical shock and impact . 89
9.13.1 Mechanical shock . 89
9.13.2 Mechanical impact . 89
9.14 Test of resistance to heat . 92
9.15 Test of resistance to abnormal heat and to fire . 93
9.16 Verification of the operation of the test device at the limits of rated voltage . 94
9.17 Verification of the behaviour of RCBOs functionally dependent on line
voltage, classified under 4.1.2.1, in case of failure of the line voltage . 94
9.17.1 Determination of the limiting value of the line voltage (U ) . 94
x
9.17.2 Verification of the automatic opening in case of failure of the line
voltage . 95
9.17.3 Verification of the correct operation, in presence of a residual
current, for RCBOs opening with delay in case of failure of the line
voltage . 95
9.17.4 Verification of correct operation of RCBOs with three or four current
paths, in presence of a residual current, the neutral and one line
terminal only being energized . 95
9.17.5 Verification of the reclosing function of automatically reclosing
RCBOs . 95
9.18 Verification of the limiting value of overcurrent in case of a single-phase load
through a three-pole or four-pole RCBOVoid . 95
9.19 Verification of behaviour of RCBOs in case of current surges caused by
impulse voltages . 96
9.19.1 Current surge test for all RCBOs (0,5 s/100 kHz ring wave test) . 96
9.19.2 Verification of behaviour at surge currents up to 3 000 A (8/20 s
surge current test) . 96
9.20 Verification of resistance of the insulation against an impulse voltageVoid . 97
9.21 Verification of correct operation of residual currents with d.c.
componentsVoid . 98
9.21.1 Type A residual current devices . 98
9.22 Verification of reliability. 99
9.22.1 Climatic test . 99
9.22.2 Test with temperature of 40 °C . 101
9.23 Verification of ageing of electronic components . 101
9.24 Electromagnetic compatibility (EMC) . 102
9.24.1 Tests covered by the present standard . 102
9.24.2 Tests to be carried out according to IEC 61543 . 102
9.25 Test of resistance to rusting . 102

Annex A (normative) Test sequence and number of samples to be submitted for
certification purposes . 131
Annex B (normative) Determination of clearances and creepage distances . 138
Annex C (normative) Arrangement for the detection of the emission of ionized gases
during short-circuit tests . 145
Annex D (normative) Routine tests . 148
Annex E (normative) Special requirements for auxiliary circuits for safety extra-low
voltage . 149
Annex F (normative) Coordination between RCBOs and separate fuses associated in
the same circuit . 150
Annex G (normative) Additional requirements and tests for RCBOs consisting of a
circuit-breaker and a residual current unit designed for assembly on site . 151

– 6 – 61009-1  IEC:2010+A1:2012
+A2:2013
Annex H (informative) Void . 155
Annex IA (informative) Methods for determination of short-circuit power-factor . 156
Annex IB (informative) Glossary of symbols . 158
Annex IC (informative) Examples of te rminals . 159
Annex ID (informative) Correspondence between ISO and AWG copper conductors . 162
Annex IE (informative) Follow-up testing programme for RCBOs . 163
Annex J (normative) Particular requirements for RCBOs with screwless type
terminals for external copper conductors . 167
Annex K (normative) Particular requirements for RCBOs with flat quick-connect
terminations . 175
Annex L (normative) Specific requirements for RCBOs with screw-type terminals
for external untreated aluminium conductors and with aluminium screw-type terminals
for use with copper or with aluminium conductors . 182
Bibliography . 192

Figure 1 – Thread-forming tapping screw (3.6.10) . 103
Figure 2 – Thread-cutting tapping screw (3.6.11) . 103
Figure 3 – Jointed test finger (9.6) . 104
Figure 4 – Test circuit for the verification of
– operating characteristics (9.9.1)
– trip-free mechanism (9.11)
– behaviour in case of failure of line voltage (9.17.3 and 9.17.4) for RCBOs
functionally dependent on line voltage . 105
Figure 5 – Test circuit for the verification of the correct operation of RCBOs, in the
case of residual pulsating direct currents . 106
Figure 6 – Test circuit for the verification of the correct operation in case of residual
pulsating direct currents in presence of a standing smooth direct current of 0,006 A . 107
Figure 7 – Test circuit for the verification of the suitability of an RCBO for use in IT
systems (9.12.11.2.2) . 109
Figure 7 – Typical diagram for all short-circuit tests except for 9.12.11.2.2 . 110
Figure 8 – Test circuit for the verification of the rated short-circuit capacity of a single-
pole RCBO with two-current paths (9.12) . 111
Figure 8 – Typical diagram for short-circuit tests according to 9.12.11.2.2 . 112
Figure 9 – Test circuit for the verification of the rated short-circuit capacity of a two-
pole RCBO, in case of a single-phase circuit (9.12) . 113
Figure 9 – Detail of impedances Z, Z and Z . 113
1 2
Figure 10 – Test circuit for the verification of the rated short-circuit capacity of a three-
pole RCBO on a three-phase circuit (9.12) Void. 114
Figure 11 – Test circuit for the verification of the rated short-circuit capacity of a three-
pole RCBO with four current paths on a three-phase circuit with neutral (9.12) Void . 115
Figure 12 – Test circuit for the verification of the rated short-circuit capacity of a four-
pole RCBO on a three-phase circuit with neutral (9.12) Void . 116
Figure 13 – Example of calibration record for short-circuit test . 117
Figure 14 – Mechanical shock test apparatus (9.13.1) . 118
Figure 15 – Mechanical impact test apparatus (9.13.2.1) . 119
Figure 16 – Striking element for pendulum impact test apparatus (9.13.2.1) . 120
Figure 17 – Mounting support for sample for mechanical impact test (9.13.2.1) . 121

61009-1  IEC:2010+A1:2012 – 7 –
+A2:2013
Figure 18 – Example of mounting an unenclosed RCBO for mechanical impact test
(9.13.2.1) . 122
Figure 19 – Example of mounting of panel mounting type RCBO for the mechanical
impact test (9.13.2.1) . 123
Figure 20 – Application of force for mechanical impact test of rail mounted RCBO
(9.13.2.2) . 124
Figure 21 – Ball-pressure test apparatus (9.14.2) . 124
Figure 22 – Test circuit for the verification of the limiting value of overcurrent in case of
a single-phase load through a three-pole or four-pole RCBO (9.18)Void . 125
Figure 23 – Stabilizing period for reliability test (9.22.1.3) . 126
Figure 24 – Reliability test cycle (9.22.1.3) . 127
Figure 25 – Example of a test circuit for verification of ageing of electronic
components (9.23) . 128
Figure 26 – Damped oscillator current wave, 0,5 s/100 kHz . 128
Figure 27 – Test circuit for the ring wave test at RCBOs . 129
Figure 28 – Surge current impulse 8/20 s . 129
Figure 29 – Test circuit for the surge current test at RCBOs . 130
Figure B.1 to B.10 – Illustrations of the application of creepage distances . 139
Figure B.1 – Examples of methods of measuring creepage distances and clearances . 144
Figure C.1 – Test arrangement . 146
Figure C.2 – Grid . 147
Figure C.3 – Grid circuit . 147
Figure IC.1 – Examples of pillar terminals . 159
Figure IC.2 – Example of screw terminals and stud terminals . 160
Figure IC.3 – Example of saddle terminals . 161
Figure IC.4 – Examples of lug terminals . 161
Figure J.1 – Connecting samples . 172
Figure J.2 – Examples of screwless-type terminals . 173
Figure K.1– Example of position of the thermocouple for measurement of the
temperature-rise . 178
Figure K.2 – Dimensions of male tabs . 179
Figure K.3 – Dimensions of round dimple detents (see Figure K.2) . 180
Figure K.4 – Dimensions of rectangular dimple detents (see Figure K.2) . 180
Figure K.5 – Dimensions of hole detents . 180
Figure K.6 – Dimensions of female connectors . 181
Figure L.1 – General arrangement for the test . 190
Figure L.2 . 190
Figure L.3 . 191
Figure L.4 . 191
Figure L.5 . 191
Figure L.6 . 191

Table 1 – Standard values of rated short-circuit capacity . 36
Table 2 – Limiting values of break time and non-actuating time for alternating residual
currents (r.m.s. values) for type AC and A RCBO . 36

– 8 – 61009-1  IEC:2010+A1:2012
+A2:2013
Table 3 – Maximum values of break time for half-wave residual currents (r.m.s. values)
for type A RCBO . 38
Table 4 – Ranges of overcurrent instantaneous tripping . 38
Table 5 – Rated impulse withstand voltage as a function of the nominal voltage of the
installation . . 38
Table 6 – Standard conditions for operation in service . 41
Table 7 – Minimum clearances and creepage distances . 45
Table 8 – Connectable cross-sections of copper conductors for screw-type terminals . 48
Table 9 – Temperature-rise values . 52
Table 10 – Time-current operating characteristics . 53
Table 11 – Requirements for RCBOs functionally dependent on line voltage . 55
Table 12 – List of type tests . 56
Table 13 – Test copper conductors corresponding to the rated currents . 57
Table 14 – Screw thread diameters and applied torques . 59
Table 15 – Pulling forces . 60
Table 16 – Conductor dimensions . 61
Table 17 – Test voltage of auxiliary circuits . 65
Table 18 – Test voltage across the open contacts for verifying the suitability for
isolation, referred to the rated impulse withstand voltage of the RCBO and the altitude
where the test is carried out . 67
Table 19 – Test voltage for verification of impulse withstand voltage for the parts not
tested in 9.7.7.1 . 69
Table 20 – List of short-circuit tests . 79
Table 21 – Power factor ranges of the test circuit . 81
Table 22 – Ratio between service short-circuit capacity (I ) and rated short-circuit
cs
capacity (I ) – (factor k) . 85
cn
Table 23 – Test procedure for I in the case of single- and two-pole RCBOs . 86
cs
Table 24 – Test procedure for I in the case of three- and four-pole RCBOs . 86
cs
Table 25 – Test procedure for I . 87
cn
Table 26 – Tripping current ranges for type A RCBOs . 75
Table 27 – Tests to be applied for EMC covered by this standard . 102
Table 28 – Test voltage for verifying the suitability for isolation, referred to the rated
impulse withstand voltage of the RCBO and the altitude where the test is carried out . 69
Table 29 – Tests to be carried out accoding to IEC 61543 . 102
Table A.1 – Test sequences . 131
Table A.2 – Number of samples for full test procedure . 134
Table A.3 – Number of samples for simplified test procedure . 136
Table A.4 – Test sequences for RCBOs having different instantaneous tripping
currents . 137
Table A.5 – Test sequences for RCBOs of different classification according to 4.6 . 137
Table IE.1 – Test sequences during follow-up inspections . 163
Table IE.2 – Number of samples to be tested . 166
Table J.1 – Connectable conductors . 169
Table J.2 – Cross-sections of copper conductors connectable to screwless-type
terminals . 170
Table J.3 – Pull forces . 171

61009-1  IEC:2010+A1:2012 – 9 –
+A2:2013
Table K.1 – Informative table on colour code of female connectors in relationship with
the cross section of the conductor . 176
Table K.2 – Overload test forces . 177
Table K.3 – Dimensions of tabs . 178
Table K.4 – Dimensions of female connectors . 181
Table L.1 – Marking for terminals . 183
Table L.2 – Connectable cross-sections of aluminium conductors for screw-type
terminals . 184
Table L.3 – List of tests according to the material of conductors and terminals . 185
Table L.4 – Connectable conductors and their theoretical diameters . 185
Table L.5 – Cross sections (S) of aluminium test conductors corresponding to the rated
currents . 186
Table L.6 – Test conductor length . 187
Table L.7 – Equalizer and busbar dimensions . 187
Table L.8 – Test current as a function of rated current . 189
Table
...

IEC 61009-1 ®
Edition 3.1 2012-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Residual current operated circuit-breakers with integral overcurrent protection
for household and similar uses (RCBOs) –
Part 1: General rules
Interrupteurs automatiques à courant différentiel résiduel avec dispositif de
protection contre les surintensités incorporé pour usages domestiques et
analogues (DD) –
Partie 1: Règles générales
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IEC 61009-1 ®
Edition 3.1 2012-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Residual current operated circuit-breakers with integral overcurrent protection

for household and similar uses (RCBOs) –

Part 1: General rules
Interrupteurs automatiques à courant différentiel résiduel avec dispositif de

protection contre les surintensités incorporé pour usages domestiques et

analogues (DD) –
Partie 1: Règles générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX CV
ICS 29.120.50 ISBN 978-2-8322-0083-4

– 2 – 61009-1  IEC:2010+A1:2012
CONTENTS
FOREWORD . 10
INTRODUCTION . 12

1 Scope . 13
2 Normative references . 15
3 Terms and definitions . 16
3.1 Definitions relating to currents flowing from live parts to earth . 16
3.2 Definitions relating to the energization of a residual current circuit-breaker . 16
3.3 Definitions relating to the operation and functions of residual current circuit-
breakers . 17
3.4 Definitions relating to values and ranges of energizing quantities . 20
3.5 Definitions relating to values and ranges of influencing quantities . 24
3.6 Definitions relating to terminals . 24
3.7 Definitions relating to conditions of operation . 26
3.8 Definitions relating to constructional elements . 27
3.9 Definitions relating to tests . 28
3.10 Definitions relating to insulation coordination . 28
4 Classification . 30
4.1 According to the method of operation . 30
4.1.1 RCBO functionally independent of line voltage (see 3.3.8) . 30
4.1.2 RCBO functionally dependent on line voltage (see 3.3.9) . 30
4.2 According to the type of installation . 31
4.3 According to the number of poles and current paths . 31
4.4 According to the possibility of adjusting the residual operating current . 31
4.5 According to resistance to unwanted tripping due to voltage surges . 31
4.6 According to behaviour in presence of d.c. components . 31
4.7 According to time-delay (in presence of a residual current) . 31
4.8 According to the protection against external influences . 31
4.9 According to the method of mounting . 32
4.10 According to the method of connection . 32
4.11 According to the instantaneous tripping current (see 3.4.18) . 32
4.12 According to the I²t characteristic . 32
4.13 According to the type of terminals . 32
5 Characteristics of RCBOs . 32
5.1 Summary of characteristics . 32
5.2 Rated quantities and other characteristics . 33
5.2.1 Rated voltage . 33
5.2.2 Rated current (I ) . 33
n
5.2.3 Rated residual operating current (I ) . 34
∆n
5.2.4 Rated residual non-operating current (I ) . 34
∆no
5.2.5 Rated frequency . 34
5.2.6 Rated short-circuit capacity (I ) . 34
cn
5.2.7 Rated residual making and breaking capacity (I ) . 34
∆m
5.2.8 RCBO type S . 34
5.2.9 Operating characteristics in case of residual currents with d.c.
components . 34

61009-1  IEC:2010+A1:2012 – 3 –
5.3 Standard and preferred values . 34
5.3.1 Preferred values of rated voltage (U ) . 34
n
5.3.2 Preferred values of rated current (I ) . 35
n
5.3.3 Standard values of rated residual operating current (I ) . 35
∆n
5.3.4 Standard value of residual non-operating current (I ) . 35
∆no
5.3.5 Standard values of rated frequency . 35
5.3.6 Values of rated short-circuit capacity . 36
5.3.7 Minimum value of the rated residual making and breaking capacity
(I ) . 36
∆m
5.3.8 Limiting values of break time and non-actuating time for RCBO of
type AC and A . 36
5.3.9 Standard ranges of overcurrent instantaneous tripping . 37
5.3.10 Standard values of rated impulse withstand voltage (U ) . 38
imp
6 Marking and other product information. 38
7 Standard conditions for operation in service and for installation . 40
7.1 Standard conditions . 40
7.2 Conditions of installation . 41
7.3 Pollution degree . 41
8 Requirements for construction and operation . 41
8.1 Mechanical design . 41
8.1.1 General . 41
8.1.2 Mechanism . 42
8.1.3 Clearances and creepage distances (see also Annex B) . 43
8.1.4 Screws, current-carrying parts and connections . 46
8.1.5 Terminals for external conductors . 47
8.1.6 Non-interchangeability . 50
8.2 Protection against electric shock . 50
8.3 Dielectric properties and isolating capability . 51
8.4 Temperature-rise . 51
8.4.1 Temperature-rise limits . 51
8.4.2 Ambient air temperature . 52
8.5 Operating characteristics . 52
8.5.1 Under residual current conditions . 52
8.5.2 Under overcurrent conditions . 52
8.6 Mechanical and electrical endurance . 54
8.7 Performance at short-circuit currents . 54
8.8 Resistance to mechanical shock and impact . 54
8.9 Resistance to heat . 54
8.10 Resistance to abnormal heat and to fire . 54
8.11 Test device. 54
8.12 Requirements for RCBOs functionally dependent on line voltage . 55
8.13 Behaviour of RCBOs in case of a single-phase overcurrent through a three-
pole or four-pole RCBO Void . 55
8.14 Behaviour of RCBOs in case of current surges caused by impulse voltages . 55
8.15 Behaviour of RCBOs in case of earth fault currents comprising a d.c.
component . 55
8.16 Reliability . 56
8.17 Electromagnetic compatibility (EMC) . 56

– 4 – 61009-1  IEC:2010+A1:2012
9 Tests . 56
9.1 General . 56
9.2 Test conditions . 57
9.3 Test of indelibility of marking . 58
9.4 Test of reliability of screws, current-carrying parts and connections . 58
9.5 Test of reliability of screw-type terminals for external copper conductors . 59
9.6 Verification of protection against electric shock . 61
9.7 Test of dielectric properties . 62
9.7.1 Resistance to humidity . 62
9.7.2 Insulation resistance of the main circuit . 62
9.7.3 Dielectric strength of the main circuit . 63
9.7.4 Insulation resistance and dielectric strength of auxiliary circuits . 64
9.7.5 Secondary circuit of detection transformers . 65
9.7.6 Capability of control circuits connected to the main circuit
withstanding high d.c. voltages due to insulation measurements . 65
9.7.7 Verification of impulse withstand voltages (across clearances and
across solid insulation) and of leakage current across open contacts . 66
9.8 Test of temperature-rise . 71
9.8.1 Ambient air temperature . 71
9.8.2 Test procedure . 71
9.8.3 Measurement of the temperature of parts . 71
9.8.4 Temperature-rise of a part . 72
9.9 Verification of the operating characteristic . 72
9.9.1 Verification of the operating characteristic under residual current
conditions . 72
9.9.2 Verification of the operating characteristic under overcurrent
conditions . 74
9.10 Verification of mechanical and electrical endurance . 75
9.10.1 General test conditions . 75
9.10.2 Test procedure . 75
9.10.3 Condition of the RCBO after test . 76
9.11 Verification of the trip-free mechanism . 76
9.11.1 General test conditions . 76
9.11.2 Test procedure . 76
9.12 Short-circuit tests . 77
9.12.1 General conditions for test . 77
9.12.2 Test circuit for short-circuit performance . 78
9.12.3 Values of test quantities . 79
9.12.4 Tolerances on test quantities . 79
9.12.5 Power factor of the test circuit . 79
9.12.6 Measurement and verification of I t and of the peak current (I ) . 80
p
9.12.7 Calibration of the test circuit . 80
9.12.8 Interpretation of records . 80
9.12.9 Condition of the RCBO for test . 80
9.12.10 Behaviour of the RCBO during short-circuit tests . 81
9.12.11 Test procedure . 82
9.12.12 Verification of the RCBO after short-circuit test . 85
9.12.13 Verification of the rated residual making and breaking capacity (I ) . 86
∆m
61009-1  IEC:2010+A1:2012 – 5 –
9.13 Verification of resistance to mechanical shock and impact . 87
9.13.1 Mechanical shock . 87
9.13.2 Mechanical impact . 88
9.14 Test of resistance to heat . 90
9.15 Test of resistance to abnormal heat and to fire . 91
9.16 Verification of the operation of the test device at the limits of rated voltage . 92
9.17 Verification of the behaviour of RCBOs functionally dependent on line
voltage, classified under 4.1.2.1, in case of failure of the line voltage . 93
9.17.1 Determination of the limiting value of the line voltage (U ) . 93
x
9.17.2 Verification of the automatic opening in case of failure of the line
voltage . 93
9.17.3 Verification of the correct operation, in presence of a residual
current, for RCBOs opening with delay in case of failure of the line
voltage . 93
9.17.4 Verification of correct operation of RCBOs with three or four current
paths, in presence of a residual current, the neutral and one line
terminal only being energized . 94
9.17.5 Verification of the reclosing function of automatically reclosing
RCBOs . 94
9.18 Verification of the limiting value of overcurrent in case of a single-phase load
through a three-pole or four-pole RCBO Void . 94
9.19 Verification of behaviour of RCBOs in case of current surges caused by
impulse voltages . 94
9.19.1 Current surge test for all RCBOs (0,5 µs/100 kHz ring wave test) . 94
9.19.2 Verification of behaviour at surge currents up to 3 000 A (8/20 µs
surge current test) . 95
9.20 Verification of resistance of the insulation against an impulse voltage Void . 95
9.21 Verification of correct operation of residual currents with d.c. components . 96
9.21.1 Type A residual current devices . 96
9.22 Verification of reliability . 98
9.22.1 Climatic test . 98
9.22.2 Test with temperature of 40 °C . 99
9.23 Verification of ageing of electronic components . 100
9.24 Electromagnetic compatibility (EMC) . 100
9.25 Test of resistance to rusting . 100

Annex A (normative) Test sequence and number of samples to be submitted for
certification purposes . 129
Annex B (normative) Determination of clearances and creepage distances . 137
Annex C (normative) Arrangement for the detection of the emission of ionized gases
during short-circuit tests . 144
Annex D (normative) Routine tests. 147
Annex E (normative) Special requirements for auxiliary circuits for safety extra-low
voltage . 148
Annex F (normative) Coordination between RCBOs and separate fuses associated in
the same circuit . 149
Annex G (normative) Additional requirements and tests for RCBOs consisting of a
circuit-breaker and a residual current unit designed for assembly on site . 150
Annex H (informative) Void . 154
Annex IA (informative) Methods for determination of short-circuit power-factor . 155
Annex IB (informative) Glossary of symbols . 157

– 6 – 61009-1  IEC:2010+A1:2012
Annex IC (informative) Examples of terminals . 158
Annex ID (informative) Correspondence between ISO and AWG copper conductors . 161
Annex IE (informative) Follow-up testing programme for RCBOs . 162
Annex J (normative) Particular requirements for RCBOs with screwless type
terminals for external copper conductors . 166
Annex K (normative) Particular requirements for RCBOs with flat quick-connect
terminations . 174
Annex L (normative) Specific requirements for RCBOs with screw-type terminals
for external untreated aluminium conductors and with aluminium screw-type terminals
for use with copper or with aluminium conductors . 181
Bibliography . 166

Figure 1 – Thread-forming tapping screw (3.6.10) . 101
Figure 2 – Thread-cutting tapping screw (3.6.11) . 101
Figure 3 – Jointed test finger (9.6) . 102
Figure 4 – Test circuit for the verification of
– operating characteristics (9.9.1)
– trip-free mechanism (9.11)
– behaviour in case of failure of line voltage (9.17.3 and 9.17.4) for RCBOs
functionally dependent on line voltage . 103
Figure 5 – Test circuit for the verification of the correct operation of RCBOs, in the
case of residual pulsating direct currents . 104
Figure 6 – Test circuit for the verification of the correct operation in case of residual
pulsating direct currents in presence of a standing smooth direct current of 0,006 A . 105
Figure 7 – Test circuit for the verification of the suitability of an RCBO for use in IT
systems (9.12.11.2.2) .
Figure 7 – Typical diagram for all short-circuit tests except for 9.12.11.2.2 . 108
Figure 8 – Test circuit for the verification of the rated short-circuit capacity of a single-
pole RCBO with two-current paths (9.12) .
Figure 8 – Typical diagram for short-circuit tests according to 9.12.11.2.2 . 110
Figure 9 – Test circuit for the verification of the rated short-circuit capacity of a two-
pole RCBO, in case of a single-phase circuit (9.12) .
Figure 9 – Detail of impedances Z, Z and Z . 111
1 2
Figure 10 – Test circuit for the verification of the rated short-circuit capacity of a three-
pole RCBO on a three-phase circuit (9.12) Void . 112
Figure 11 – Test circuit for the verification of the rated short-circuit capacity of a three-
pole RCBO with four current paths on a three-phase circuit with neutral (9.12) Void . 113
Figure 12 – Test circuit for the verification of the rated short-circuit capacity of a four-
pole RCBO on a three-phase circuit with neutral (9.12) Void . 114
Figure 13 – Example of calibration record for short-circuit test . 115
Figure 14 – Mechanical shock test apparatus (9.13.1) . 116
Figure 15 – Mechanical impact test apparatus (9.13.2.1) . 117
Figure 16 – Striking element for pendulum impact test apparatus (9.13.2.1) . 118
Figure 17 – Mounting support for sample for mechanical impact test (9.13.2.1) . 119
Figure 18 – Example of mounting an unenclosed RCBO for mechanical impact test
(9.13.2.1) . 120
Figure 19 – Example of mounting of panel mounting type RCBO for the mechanical
impact test (9.13.2.1) . 121

61009-1  IEC:2010+A1:2012 – 7 –
Figure 20 – Application of force for mechanical impact test of rail mounted RCBO
(9.13.2.2) . 122
Figure 21 – Ball-pressure test apparatus (9.14.2) . 122
Figure 22 – Test circuit for the verification of the limiting value of overcurrent in case of
a single-phase load through a three-pole or four-pole RCBO (9.18) Void . 123
Figure 23 – Stabilizing period for reliability test (9.22.1.3) . 124
Figure 24 – Reliability test cycle (9.22.1.3) . 125
Figure 25 – Example of a test circuit for verification of ageing of electronic
components (9.23) . 126
Figure 26 – Damped oscillator current wave, 0,5 µs/100 kHz . 126
Figure 27 – Test circuit for the ring wave test at RCBOs . 127
Figure 28 – Surge current impulse 8/20 µs . 127
Figure 29 – Test circuit for the surge current test at RCBOs . 128
Figure B.1 to B.10 – Illustrations of the application of creepage distances .
Figure B.1 – Examples of methods of measuring creepage distances and clearances . 143
Figure C.1 – Test arrangement . 145
Figure C.2 – Grid . 146
Figure C.3 – Grid circuit . 146
Figure IC.1 – Examples of pillar terminals . 158
Figure IC.2 – Example of screw terminals and stud terminals. 159
Figure IC.3 – Example of saddle terminals . 160
Figure IC.4 – Examples of lug terminals . 160
Figure J.1 – Connecting samples . 171
Figure J.2 – Examples of screwless-type terminals . 172
Figure K.1 – Example of position of the thermocouple for measurement of the
temperature-rise . 177
Figure K.2 – Dimensions of male tabs . 178
Figure K.3 – Dimensions of round dimple detents (see Figure K.2) . 179
Figure K.4 – Dimensions of rectangular dimple detents (see Figure K.2) . 179
Figure K.5 – Dimensions of hole detents . 179
Figure K.6 – Dimensions of female connectors . 180
Figure L.1 – General arrangement for the test. 189
Figure L.2 . 189
Figure L.3 . 190
Figure L.4 . 190
Figure L.5 . 190
Figure L.6 . 190

Table 1 – Standard values of rated short-circuit capacity . 36
Table 2 – Limiting values of break time and non-actuating time for alternating residual
currents (r.m.s. values) for type AC and A RCBO . 36
Table 3 – Maximum values of break time for half-wave residual currents (r.m.s. values)
for type A RCBO . 37
Table 4 – Ranges of overcurrent instantaneous tripping . 38

– 8 – 61009-1  IEC:2010+A1:2012
Table 5 – Rated impulse withstand voltage as a function of the nominal voltage of the
installation . 38
Table 6 – Standard conditions for operation in service . 41
Table 7 – Minimum clearances and creepage distances . 45
Table 8 – Connectable cross-sections of copper conductors for screw-type terminals . 48
Table 9 – Temperature-rise values . 52
Table 10 – Time-current operating characteristics . 53
Table 11 – Requirements for RCBOs functionally dependent on line voltage . 55
Table 12 – List of type tests . 56
Table 13 – Test copper conductors corresponding to the rated currents . 57
Table 14 – Screw thread diameters and applied torques . 58
Table 15 – Pulling forces . 60
Table 16 – Conductor dimensions .
Table 17 – Test voltage of auxiliary circuits . 65
Table 18 – Test voltage across the open contacts for verifying the suitability for
isolation, referred to the rated impulse withstand voltage of the RCBO and the altitude
where the test is carried out . 66
Table 19 – Test voltage for verification of impulse withstand voltage for the parts not
tested in 9.7.7.1 . 69
Table 20 – List of short-circuit tests . 77
Table 21 – Power factor ranges of the test circuit . 80
Table 22 – Ratio between service short-circuit capacity (I ) and rated short-circuit
cs
capacity (I ) – (factor k) . 84
cn
Table 23 – Test procedure for I in the case of single- and two-pole RCBOs . 84
cs
Table 24 – Test procedure for I in the case of three- and four-pole RCBOs . 85
cs
Table 25 – Test procedure for I . 85
cn
Table 26 – Tripping current ranges for type A RCBOs . 97
Table 27 – Tests to be applied for EMC . 100
Table 28 – Test voltage for verifying the suitability for isolation, referred to the rated
impulse withstand voltage of the RCBO and the altitude where the test is carried out . 69
Table A.1 – Test sequences. 129
Table A.2 – Number of samples for full test procedure . 133
Table A.3 – Number of samples for simplified test procedure . 135
Table A.4 – Test sequences for RCBOs having different instantaneous tripping
currents . 136
Table A.5 – Test sequences for RCBOs of different classification according to 4.6 . 136
Table IE.1 – Test sequences during follow-up inspections . 162
Table IE.2 – Number of samples to be tested . 165
Table J.1 – Connectable conductors . 168
Table J.2 – Cross-sections of copper conductors connectable to screwless-type
terminals . 169
Table J.3 – Pull forces . 170
Table K.1 – Informative table on colour code of female connectors in relationship with
the cross section of the conductor. 175
Table K.2 – Overload test forces . 176
Table K.3 – Dimensions of tabs . 177

61009-1  IEC:2010+A1:2012 – 9 –
Table K.4 – Dimensions of female connectors . 180
Table L.1 – Marking for terminals . 182
Table L.2 – Connectable cross-sections of aluminium conductors for screw-type
terminals . 183
Table L.3 – List of tests according to the material of conductors and terminals . 184
Table L.4 – Connectable conductors and their theoretical diameters . 184
Table L.5 – Cross sections (S) of aluminium test conductors corresponding to the rated
currents . 185
Table L.6 – Test conductor length . 186
Table L.7 – Equalizer and busbar dimensions . 186
Table L.8 – Test current as a function of rated current . 188
Table L.9 – Example of calculation for determining the average temperature deviation D . 188

– 10 – 61009-1  IEC:2010+A1:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RESIDUAL CURRENT OPERATED CIRCUIT-BREAKERS
WITH INTEGRAL OVERCURRENT PROTECTION
FOR HOUSEHOLD AND SIMILAR USES (RCBOs) –

Part 1: General rules
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-
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...