IEC 61008-2-2:2024

IEC 61008-2-2 ®
Edition 2.0 2024-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Residual current operated circuit-breakers without integral overcurrent
protection for household and similar uses (RCCBs) –
Part 2-2: RCCBs according to classification 4.1.2, 4.1.3, 4.1.4, 4.1.5 and 4.1.6

Interrupteurs automatiques à courant différentiel résiduel sans dispositif de
protection contre les surintensités incorporé pour usages domestiques et
analogiques (ID) –
Partie 2-2: ID conformes à la classification en 4.1.2, 4.1.3, 4.1.4, 4.1.5 et 4.1.6
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IEC 61008-2-2 ®
Edition 2.0 2024-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Residual current operated circuit-breakers without integral overcurrent

protection for household and similar uses (RCCBs) –

Part 2-2: RCCBs according to classification 4.1.2, 4.1.3, 4.1.4, 4.1.5 and 4.1.6

Interrupteurs automatiques à courant différentiel résiduel sans dispositif de

protection contre les surintensités incorporé pour usages domestiques et

analogiques (ID) –
Partie 2-2: ID conformes à la classification en 4.1.2, 4.1.3, 4.1.4, 4.1.5 et 4.1.6

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50  ISBN 978-2-8327-0009-9

– 2 – IEC 61008-2-2:2024 © IEC 2024
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Classification . 7
4.1 According to the supply conditions . 7
5 Characteristics of RCCBs . 8
5.1 Summary of characteristics . 8
5.2 Rated quantities and other characteristics . 8
5.3 Standard and preferred values . 8
6 Marking and other product information . 8
7 Standard conditions for operation in service and for installation . 9
8 Requirements for construction and operation . 9
9 Tests . 11
9.1 General . 11
Annex A (normative) Test sequence and number of samples to be submitted for
certification purposes . 32
A.1 Test sequences . 32
A.2 Number of samples to be submitted for full test procedure . 33
A.3 Number of samples to be submitted for simplified test procedures if submitting
simultaneously a range of RCCBs of the same fundamental design . 34
Annex D (normative) Routine tests . 38
D.3 Dielectric strength test . 38
Bibliography . 39

Figure 22 – Example for test circuit for verification of ageing of electronic components . 24
Figure 26 – Gauges of Form A and Form B . 24
Figure 28 – Test circuit for the verification of operating characteristics and trip-free
mechanism for RCCB classified according to 4.1.2 to 4.1.6 . 25
Figure 29 – Test circuit for the verification of the correct operation in the event of
residual pulsating direct currents . 26
Figure 30 – Test circuit for the verification of the correct operation in the event of
residual pulsating direct currents in the presence of a standing smooth direct current of
0,006 A . 27
Figure 31 – Test circuit for verification of the standing current in the FE . 28
Figure 33 – Typical diagram for all short circuit tests except for 9.11.2.3 c) for RCCBs
according to 4.1.3 . 30
Figure 34 – Typical diagram for short circuit tests according to 9.11.2.3 c) for RCCBs
according to 4.1.3 . 31

Table 33 – Requirements for RCCBs classified according to 4.1.2 to 4.1.6 . 23
Table 200 – Gauges for the verification of the rated connecting capacity
of the FE terminal . 23
Table 201 – Additional withstand values and duration of temporary overvoltages for
RCCBs classified according to 4.1.3 . 23

Table A.1 – Test sequences . 32
Table A.2 – Number of samples for full test procedure . 34
Table A.3 – Number of samples for simplified test procedure . 35
Table A.4 – Test sequences for RCCBs of different classification according to
IEC 61008-1:2024, 4.3 . 37

– 4 – IEC 61008-2-2:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RESIDUAL CURRENT OPERATED CIRCUIT-BREAKERS
WITHOUT INTEGRAL OVERCURRENT PROTECTION
FOR HOUSEHOLD AND SIMILAR USES (RCCBs) –

Part 2-2: RCCBs according to classification
4.1.2, 4.1.3, 4.1.4, 4.1.5 and 4.1.6

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,
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 61008-2-2 has been prepared by subcommittee 23E: Circuit-breakers and similar
equipment for household use, of IEC technical committee 23: Electrical accessories. It is an
International Standard.
This second edition cancels and replaces the first edition published in 1990. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) harmonization of all clauses between the IEC 61008, IEC 61009 and IEC 60755 series using
blocks and modules approach;
b) harmonization of all tables and figures between the IEC 61008, IEC 61009 and IEC 60755
series;
c) terms and definitions are now referred to IEC 62873-2;
d) modification of 4.1 for classification according to supply conditions;
e) modification of Clause 6 for markings of RCCBs with a functional earth (FE);
f) specific tests for operating characteristics of RCCBs according to classifications 4.1.2,
4.1.3, 4.1.4, 4.1.5 and 4.1.6;
g) specific test conditions for dielectric properties (9.7), temperature rise (9.8), electrical and
mechanical endurance (9.10), short-circuit tests (9.11), verification of trip-free (9.15),
behaviour in case of loss of the supply voltage (9.17), surge current tests (9.19), reliability
(9.20), ageing (9.21) and temporary overvoltage (TOV) (9.24);
h) additional tests for RCCBs with a terminal connected to the FE: connecting capacity of FE
terminal (9.200) and limitation of standing current in the FE (9.201).
The text of this International Standard is based on the following documents:
Draft Report on voting
23E/1370/FDIS 23E/1387/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This International Standard is to be used in conjunction with IEC 61008-1:2024.
Where this document states "addition", "deletion" or "replacement", the corresponding
requirement, test specification or explanatory material in IEC 61008-1:2024 is adapted
accordingly.
Where this document defines a new subclause, this subclause number starts at 200 (for
example an additional definition in this part would read 3.200).
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 61008 series, published under the general title Residual current
operated circuit-breakers without integral overcurrent protection for household and similar uses
(RCCBs), can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
– 6 – IEC 61008-2-2:2024 © IEC 2024
RESIDUAL CURRENT OPERATED CIRCUIT-BREAKERS
WITHOUT INTEGRAL OVERCURRENT PROTECTION
FOR HOUSEHOLD AND SIMILAR USES (RCCBs) –

Part 2-2: RCCBs according to classification
4.1.2, 4.1.3, 4.1.4, 4.1.5 and 4.1.6

1 Scope
IEC 61008-1:2024, Clause 1 is applicable except for the first paragraph, which is replaced by
the first paragraph below, and the last paragraph, which is replaced by the second paragraph
and note below:
This document applies to residual current operated circuit-breakers, without integral overcurrent
protection, for household and similar uses (hereafter referred to as RCCBs), classified
according to IEC 61008-1:2024, 4.1.2, 4.1.3, 4.1.4, 4.1.5 and 4.1.6. RCCBs according to this
document are intended for voltages not exceeding 440 V AC with frequencies of 50 Hz, 60 Hz
or 50/60 Hz and currents not exceeding 125 A, intended principally for protection against shock
hazard.
This document applies in conjunction with IEC 61008-1:2024. It specifies requirements, tests
and test sequences to verify compliance and is used for certification purposes.
NOTE Devices according to this part are not permitted in: DE
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 61008-1:2024, Residual current operated circuit-breakers without integral overcurrent
protection for household and similar uses (RCCBs) – Part 1: General rules
IEC 61543:2022, Residual current-operated protective devices (RCDs) for household and
similar use – Electromagnetic compatibility
IEC 62873-2, Residual current operated circuit-breakers for household and similar use – Part 2:
Residual current devices (RCDs) – Vocabulary
IEC 62873-3-1, Residual current operated circuit-breakers for household and similar use –
Part 3-1: Particular requirements for devices with screwless-type terminals for external copper
conductors
IEC 62873-3-2, Residual current operated circuit-breakers for household and similar use –
Part 3-2: Particular requirements for devices with flat quick-connect terminations

3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62873-2, in
IEC 61008-1 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.200
limiting impedance value
R
x
maximum impedance value from the FE to the supply source for which protection is ensured
when the RCCB classified in accordance with 4.1.3 is supplied from any one phase only and
FE
4 Classification
IEC 61008-1:2024, Clause 4 applies with the following modifications (deletion of 4.1.1):
4.1 According to the supply conditions
4.1.2 RCCB with 2 or 4 current paths operating correctly on the occurrence of residual
current within the voltage range of 1,1 U and 85 V
e
The RCCB does not open automatically in the event of loss of supply.
NOTE In China, the lower limit value of 50 V (line to neutral) is required (for RCCBs with I ≤ 30 mA) instead of
Δn
85 V.
4.1.3 RCCB according to 4.1.2 fitted with a functional earth (FE) and able to continue to
provide protection when supplied from just one phase and FE
4.1.3.1 Does not open automatically in the event of loss of supply and continues to provide
residual current protection in the case of supply from just one phase and FE.
4.1.3.2 Does not open automatically in the event of loss of one or more phases and provides
protection by opening automatically if supplied from just one phase and FE.
4.1.4 RCCB with 3 current paths operating correctly on the occurrence of residual
current within the voltage range of 1,1 U and 0,7 U
e e
The RCCB does not open automatically in the case of loss of supply.
These devices are not intended to be supplied from single-phase circuits.
4.1.5 RCCB operating correctly on the occurrence of residual current within the voltage
range 1,1 U and U
e x
The device opens automatically, with or without delay, in the event of a supply voltage drop to
a value less than U .
x
– 8 – IEC 61008-2-2:2024 © IEC 2024
4.1.6 RCCB according to 4.1.5, however reclosing automatically after restoration of the
supply voltage
5 Characteristics of RCCBs
IEC 61008-1:2024, Clause 5 applies with the following modifications.
5.1 Summary of characteristics
IEC 61008-1:2024, 5.1 applies with the following addition:
– minimum operating voltage U (see 5.2.1.200);
x
– rated value R (see 5.3.200).
x
5.2 Rated quantities and other characteristics
Add the following subclause:
5.2.1.200 Minimum operating voltage (U )
x
The minimum operating voltage, where applicable, as declared by the manufacturer for RCCBs.
5.3 Standard and preferred values
Add the following subclause:
5.3.200 Rated values for R
x
The standard value for R is 2 Ω for:
x
– single-pole RCCBs with two current paths; or
– three-pole with four current paths; or
– RCCBs rated 120 V or 120/240 V.
NOTE These devices are intended to be used in TN-systems only.
For other RCCBs, the standard R value shall be 6 kΩ unless a lower value is declared by the
x
manufacturer.
6 Marking and other product information
IEC 61008-1:2024, Clause 6 applies with the following addition.
6.200 Marking of RCCBs classified according to 4.1.3
This Subclause 6.200 applies to RCCBs classified according to 4.1.3.
in Ω, for values other than those specified in
RCCB shall be marked with the rated value R
x
5.3.200 (e.g. R = 5 000 Ω).
x
This information may be marked on the side or on the back of the device and shall be visible
only before the device is installed.

The following additional information is required in the manufacturer's instructions:
– this device will provide protection in installations where the earth loop impedance does not
exceed the R value.
x
The FE-wire or terminal shall be identified by the marking "FE".
In addition, if a terminal is used, the marking of the maximum rated connecting capability (e.g.
"max 2,5 mm ") shall be visible close to the terminal.
The following colours are not allowed for the FE-wire:
– green, yellow, blue and green-and-yellow.
The manufacturer's instructions shall state that the FE shall be connected directly to the PE
and looping in the FE terminal is not allowed.
Compliance is verified by inspection.
6.201 Marking of RCCBs classified according to 4.1.5 and 4.1.6
For RCCBs classified according to 4.1.5 and 4.1.6 and opening with a delay in the event of
failure of the line voltage, the manufacturer shall state in its product information the range of
such delay.
Compliance is verified by inspection.
7 Standard conditions for operation in service and for installation
IEC 61008-1:2024, Clause 7 applies.
8 Requirements for construction and operation
IEC 61008-1:2024, Clause 8 applies with the following modifications:
8.1.2 Mechanism
IEC 61008-1:2024, 8.1.2 applies with the following addition:
In the case of RCCBs classified according to 4.1.6, the operating means shall remain in the ON
position following automatic opening of the contacts; when the line voltage is re-established,
the contacts shall reclose automatically unless in the meantime the operating means has been
placed in the OFF position. For this type of RCCB, the operating means shall not be used as a
means for indicating the closed and open positions.
8.1.3 Clearances, creepage distances and solid insulation
IEC 61008-1:2024, 8.1.3.1 applies with the following addition:
For RCCBs classified according to 4.1.3, IEC 61008-1:2024, Table 20 applies with the following
additional requirement:
In the evaluation of the minimum required clearances and creepage distances, the FE is
considered as a live part. In the case of RCCBs provided with flying leads, the measurements
are carried out with the RCCB installed as in normal use.

– 10 – IEC 61008-2-2:2024 © IEC 2024
8.1.5 Terminals for external conductors
IEC 61008-1:2024, 8.1.5 applies with the following addition for RCCBs classified according to
4.1.3:
8.1.5.200 Additional requirements for FE terminal or FE-wire
This Subclause 8.1.5.200 applies to RCCBs classified according to 4.1.3.
The rated connecting capacity of the FE terminal shall not exceed 2,5 mm and it shall not be
possible to connect a wire greater than 2,5 mm .
The RCCB FE-wire shall have a cross-section of at least 0,75 mm .
Compliance is checked by the tests of 9.200, inspection and measurement.
8.1.5.201 Screwless or flat quick-connect terminal for FE
This Subclause 8.1.5.201 applies to RCCBs classified according to 4.1.3.
It shall not be possible to connect a wire with cross-sectional area greater than 2,5 mm to an
FE terminal.
– If the FE terminal is of a screwless type, it shall be for one conductor only and shall comply
with IEC 62873-3-1;
– If the FE terminal is of a flat quick-connect terminations type, it shall be limited to one wire
and shall comply with IEC 62873-3-2.
8.12 Requirements for RCCBs in the event of loss of supply
RCCBs shall operate according to their classification in the event of loss of supply (see
Table 33).
For RCCBs classified according to 4.1.5 and 4.1.6, U shall not be greater than 0,85 U (or, if
x e
relevant, 0,85 times the minimum value of the range of rated voltages).
RCCBs classified according to 4.1.6 shall not reclose automatically after opening due to a
residual current.
Compliance is checked by the test of 9.17.
8.17 Resistance to temporary overvoltages (TOV)
IEC 61008-1:2024, 8.17 applies with the following addition:
For RCCBs classified according to 4.1.3, the following additional requirements regarding the
resistance to temporary overvoltages (TOV) apply:
Withstand values of alternating overvoltage levels and duration are given in Table 201.
Compliance of the above requirement is checked by the test of 9.24.200.

8.200 Standing current in the FE under normal conditions
This Subclause 8.200 applies to RCCBs classified according to 4.1.3.
The standing current from the FE through the protective conductor shall not exceed 1 mA under
normal supply conditions.
Compliance is checked by the test of 9.201.2.
8.201 Standing current in the FE in the case of RCCB supplied from just one phase and
FE
This Subclause 8.201 applies to RCCBs classified according to 4.1.3.
When the RCCB is supplied from just one phase and FE as for single-phase conditions, the
standing current in the FE shall not exceed 2 mA.
Compliance is checked by the test of 9.201.3.
9 Tests
IEC 61008-1:2024, Clause 9 applies with the following modifications.
9.1 General
IEC 61008-1:2024, 9.1 applies with the following modification:
Replace the third paragraph by:
The test sequences and the number of samples to be submitted are stated in Annex A.
9.7 Test of dielectric properties
IEC 61008-1:2024, Clause 9.7 applies with the following modifications.
9.7.2 Insulation resistance of the main circuit
IEC 61008-1:2024, 9.7.2 applies with the following additions:
Add at the end of 9.7.2 b) the following:
For RCCBs classified according to 4.1.3, for the purpose of this test, the FE is considered as a
pole and the electronic circuit between poles and FE shall be disconnected.
For RCCBs classified according to 4.1.5 and 4.1.6 not remaining in the closed position, each
pole is bridged by an external connection;
Add at the end of 9.7.2 c) the following:
For RCCBs classified according to 4.1.3, for the purpose of this test, the FE is connected to all
poles.
For RCCBs classified according to 4.1.5 and 4.1.6 not remaining in the closed position, each
pole is bridged by an external connection;

– 12 – IEC 61008-2-2:2024 © IEC 2024
9.7.6 Capability of control circuits connected to the main circuit withstanding high DC
voltages due to insulation measurements
For RCCBs classified according to 4.1.3, the text of IEC 61008-1:2024, 9.7.6 is replaced by the
following:
The test is carried out on the RCCB fixed on a metal support, in the closed position, with all
control circuits connected as in service.
A DC voltage source is used with the following characteristics:
+25
– open voltage: 600 V V
– maximum ripple: 5 %
+2
– short-circuit current: 12 mA mA
This test voltage is applied for 1 min, in turn between each pole and the other poles connected
together to the frame. For the purpose of this test the FE is considered as part of the frame.
After this treatment, under the conditions of 9.9.1.2.3, the RCCB shall trip with a test current of
I . Only one test is carried out, the break time shall comply with IEC 61008-1:2024, Table 11.
Δn
Moreover, the RCCB shall be capable of performing satisfactorily the tests specified in 9.9.1.5.1
or 9.9.1.5.2 as applicable with only one measurement.
9.7.7.2 Verification of clearances with the impulse withstand voltage
IEC 61008-1:2024, 9.7.7.2 applies with the following additions:
Add after the fifth paragraph (before list item a)) the following:
For RCCBs classified according to 4.1.5 and 4.1.6, not remaining in the closed position, each
pole is bridged by an external connection.
For the tests according to 9.7.7.2 b), the following applies:
For RCCBs classified according to 4.1.3, the test of 9.7.7.2 b) is carried out by applying the
impulse voltage between:
– the metal support connected together with the terminal(s) intended for the protective
conductor(s), or FE, and
– the phase pole(s) and neutral pole (or path) connected together.
9.8 Test of temperature-rise
IEC 61008-1:2024, Clause 9.8 applies with the following modifications.
9.8.2 Test procedure
IEC 61008-1:2024, 9.8.2 applies with the following addition:
The test is performed at any convenient voltage, the electronic components being supplied at
the rated voltage.
Special samples, permitting to supply the electronic components at the rated voltage may be
prepared by the manufacturer for this test.
NOTE Figure 22 gives an example of a test circuit for supplying RCCBs including electronic components with rated
voltage, but at reduced energy consumption of the complete test arrangement.
9.9 Verification of the operating characteristics
9.9.1 Verification of the operating characteristics under residual current conditions
9.9.1.1 Test circuit and test procedure
The RCCB is installed as for normal use.
The test circuit shall be of negligible inductance. For tests according to 9.9.1.2, the test circuit
shall correspond to Figure 28. For tests according to 9.9.1.3, the test circuit shall correspond
to Figure 29 or Figure 30, as applicable.
Unless otherwise specified in this document, the tests shall be carried out at 1,1 U .
e
The FE, if any, is connected to the supply neutral, via the resistor R .
x
The instruments for the measurement of the residual current shall display (or allow to determine)
the true RMS value.
Unless otherwise specified in this document, the tests are performed with no load at the ambient
air temperature of 20 °C ±5 °C.
The RCCB shall perform the tests of 9.9.1.2 and 9.9.1.3, as applicable. Each test is performed
by applying the residual current to one pole only, taken at random, with five measurements,
unless otherwise specified in this document.
For RCCBs having more than one rated frequency, the tests shall be carried out at the lowest
and highest frequency, except for test in 9.9.1.2.5 where verification is performed at only one
frequency.
For RCCBs having multiple settings of residual operating current, the tests shall be made for
each setting.
9.9.1.2 Tests for all RCCBs
9.9.1.2.1 Verification of correct operation in case of a steady increase of the residual
current
The switches S , S , S , S and the RCCB being in the closed position, the residual current is
1 2 3 4
steadily increased, starting from a value not higher than 0,2 I , trying to attain the value of I
Δn Δn
within 30 s. The test shall be performed five times, the tripping current being measured each
time.
All five measured values shall be situated between I and I .
Δno Δn
For RCCBs where the load and line terminals are not marked, the test shall be performed by
connecting the supply on one side of the poles for two samples and then on the other side of
the poles for one sample.
– 14 – IEC 61008-2-2:2024 © IEC 2024
9.9.1.2.2 Verification of correct operation on closing on a residual current
The test circuit being calibrated at the value of the rated residual operating current I and the
Δn
switches S , S , S and S being closed, the RCCB is closed to simulate service conditions as
1 2 3 4
closely as possible. The break time is measured five times. No measurement shall exceed the
limiting value specified for I in IEC 61008-1:2024, Table 11, according to the type of RCCB.
Δn
9.9.1.2.3 Verification of correct operation in case of sudden appearance of residual
current
1) All types
The test circuit being successively calibrated at each of the values of residual current
specified in IEC 61008-1:2024, Table 11, the switches S , S , S and the RCCB being in
2 3 4
the closed position, the test voltage is suddenly established by closing the switch S .
The RCCB shall trip during each test.
Five measurements of the break time are made at each value of residual current.
No value shall exceed the relevant specified limiting value given in IEC 61008-1:2024,
Table 11.
2) Additional test for type S
The test circuit being successively calibrated at each of the values of residual current
specified in IEC 61008-1:2024, Table 11, the switches S , S , S and the RCCB being in
1 3 4
the closed position, the residual current is suddenly established by closing the switch S for
periods corresponding to the relevant minimum non-actuating times, with a tolerance of
%.
–5
Each application of residual current shall be separated from the previous one by an interval
of at least 1 min.
The RCCB shall not trip during any of the tests.
9.9.1.2.4 Verification of correct operation in case of sudden appearance of residual
currents between 5 I and 500 A
∆n
The test circuit is calibrated successively to the following values of the residual current:
5 A, 10 A, 20 A, 50 A, 100 A and 200 A.
The switches S , S , S and the RCCB being in the closed position, the residual current is
1 3 4
suddenly established by closing the switch S .
The RCCB shall trip during each test. The break time shall not exceed the times given in
IEC 61008-1:2024, Table 11.
The test is made once for each value of residual current on one pole only, taken at random.
9.9.1.2.5 Verification of correct operation with load
The tests of 9.9.1.2.2 and 9.9.1.2.3 are repeated, the pole under test and one other pole of the
RCCB being loaded with rated current at rated voltage. For 9.9.1.2.2, the device is open before
the test.
For the test of 9.9.1.2.3, the switches S , S , S and the RCCB are in closed position. The
1 3 4
residual current is established by closing S .
For this test, it is not intended to reach thermal steady-state conditions.

NOTE The loading with rated current is not shown in Figure 28.
9.9.1.2.6 Tests at the temperature limits
The RCCB shall perform the tests specified in 9.9.1.2.3 under the following conditions,
successively:
1) ambient air temperature: −5 °C, off load, RCCBs according to 4.1.2 and 4.1.3 are supplied
at 0,85 U , RCCBs according to 4.1.4 are supplied at 0,7 U , RCCBs according to 4.1.5 and
e e
4.1.6 are supplied at U .
x
2) ambient air temperature: +40 °C, the RCCB having been previously loaded with the rated
current, until it attains thermal steady state conditions. The verification of correct operation
at residual currents is performed at 1,1 U .
e
Preheating may be carried out at any convenient voltage at either 50 Hz or 60 Hz but
auxiliary circuits and the electronic circuitry shall be connected to their normal operating
voltage.
In practice, these conditions are reached when the variation of temperature rise does not
exceed 1 K per hour.
For the tripping tests in 2), the flow of rated current may be interrupted, provided that the
total interruption period does not exceed 30 s. As soon as the sum of interruption periods
exceeds 30 s, the RCCB shall be loaded again with rated current for 5 min before next
tripping time measurement.
9.9.1.3 Additional verification of correct operation for RCCBs of type A
9.9.1.3.1 Verification of correct operation in case of a continuous rise of residual
pulsating direct current
The test shall be performed according to Figure 29.
The switches S , S , S and the RCCB shall be closed. The relevant thyristor shall be controlled
1 2 4
in such a manner that current delay angles α of 0°, 90° and 135° are obtained. Each pole of the
RCCB shall be tested twice at each of the current delay angles, in position I as well as in
position II of the switch S .
For each test, the current shall be steadily increased at an approximate rate of 1,4 I /
Δn
30 amperes per second for RCCBs with I > 0,01 A, and at an approximate rate of 2 I /
Δn Δn
30 amperes per second for RCCBs with I ≤ 0,01 A, starting from zero. The tripping current
Δn
shall be in accordance with IEC 61008-1:2024, Table 14.
9.9.1.3.2 Verification of correct operation in case of suddenly appearing residual
pulsating direct currents
The RCCB shall be tested according to Figure 29.
The circuit being successively calibrated at the values specified hereafter and the switches S ,
S and the RCCB being in the closed position, the residual current is suddenly established by
closing the switch S .
The test is carried out at each value of residual current specified in IEC 61008-1:2024, Table 12,
according to the type of RCCB.
Two measurements of the break time are made at each value of residual current, at a current
delay angle α = 0° with the switch S in position I for the first measurement and in position II
for the second measurement.
– 16 – IEC 61008-2-2:2024 © IEC 2024
No value shall exceed the specified limiting values.
9.9.1.3.3 Verification of correct operation with load
The tests of 9.9.1.3.1 are repeated, the pole under test and one other pole of the RCCB being
loaded with the rated current, at the rated voltage.
For this test it is not intended to reach thermal steady-state conditions.
NOTE The loading with rated current is not shown in Figure 29.
9.9.1.3.4 Verification of correct operation in case of residual pulsating direct currents
superimposed by a smooth direct current of 0,006 A
The RCCB shall be tested according to Figure 30 with a half wave rectified residual current
(current delay angle α = 0°) superimposed by a smooth direct current of 0,006 A of same
polarity.
Each pole of the RCCB is tested in turn, twice at each of positions I and II.
For each test, the current shall be steadily increased at an approximate rate of 1,4 I /
Δn
30 amperes per second for RCCBs with I > 0,01 A, and at an approximate rate of 2 I /
Δn Δn
30 amperes per second for RCCBs with I ≤ 0,01 A, starting from zero. The tripping current
Δn
shall be in accordance with the upper limit of IEC 61008-1:2024, Table 14.
9.9.1.4 Additional tests at minimum voltage
For all types of RCCBs the tests of 9.9.1.2.1, 9.9.1.2.2 and additionally, for type A RCCBs the
or 2 I as relevant), are repeated in the following
tests of 9.9.1.3.1 and 9.9.1.3.2 (at 1,4 I
Δn Δn
conditions:
– For RCCBs according to 4.1.2 and 4.1.3, at 85 V connected to any two current paths chosen
at random, one of the current paths being the neutral, if available;
– For RCCBs according to 4.1.4, at 0,7 U connected to any two current paths chosen at
e
random;
– For RCCBs according to 4.1.5 and 4.1.6, at U connected to any current paths chosen at
x
random, one of the current paths being the neutral, if available.
9.9.1.5 Verification of the correct operation of RCCBs classified according to 4.1.3
9.9.1.5.1 Verification for RCCB classified according to 4.1.3.1 when supplied between
one phase and FE
The test is pe
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