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IEC 60947-2
Edition 5.0 2019-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Low-voltage switchgear and controlgear –
Part 2: Circuit-breakers
Appareillage à basse tension –
Partie 2: Disjoncteurs
IEC 60947-2: 2016-06/AMD1:2019-07(en-fr)
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IEC 60947-2
Edition 5.0 2019-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Low-voltage switchgear and controlgear –
Part 2: Circuit-breakers
Appareillage à basse tension –
Partie 2: Disjoncteurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.20 ISBN 978-2-8322-6997-8
– 2 – IEC 60947-2:2016/AMD1:2019
© IEC 2019
FOREWORD
This amendment has been prepared by subcommittee 121A: Low-voltage switchgear and
controlgear, of IEC technical committee 121: Switchgear and controlgear and their assemblies
for low voltage.
The text of this amendment is based on the following documents:
FDIS Report on voting
121A/286/FDIS 121A/302/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website 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• withdrawn,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.
_____________
1.1 Scope and object
Replace the existing first paragraph by the following:
This part of IEC 60947 series applies to circuit-breakers, intended to be installed and
operated by instructed or skilled persons, the main contacts of which are intended to be
connected to circuits, the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c.;
it also contains additional requirements for integrally fused circuit-breakers.
th
Replace the 16 existing paragraph by the following:
For certain specific applications (for example traction, rolling mills, marine service,
downstream of variable frequency drives, use in explosive atmospheres), particular or
additional requirements may be necessary.
1.2 Normative references
Replace the existing references to IEC 61000-4-2, IEC 61140, and CISPR 11 by the following
new references:
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
IEC 61140:2016, Protection against electric shock – Common aspects for installation and
equipment
© IEC 2019
CISPR 11:2015, Industrial, scientific and medical equipment – Radio-frequency disturbance
characteristics – Limits and methods of measurement
CISPR 11:2015/AMD1:2016
Delete the existing references to IEC 60364 (all parts), IEC 61000-3-2, IEC 61000-3-3 and
CISPR 22.
Add the following new normative references to the existing list:
IEC 60228, Conductors of insulated cables
IEC 61545, Connecting devices – Devices for the connection of aluminium conductors in
clamping units of any material and copper conductors in aluminium bodied clamping units
CISPR 32:2015, Electromagnetic compatibility of multimedia equipment – Emission
requirements
Add, after the existing definition 2.22, the following new definition:
2.23
closing release
closing coil
release, energized by a source of voltage, which triggers the closing of the circuit-breaker
Note 1 to entry: A closing release is an auxiliary device of the circuit-breaker, and is different from the "closing
device" mentioned in the figures of Annex A, and in IEC 60947-1, which is part of the test setup and is intended to
establish the short-circuit current.
4.7.1 Types
Renumber existing item "4) other releases." to item "5) other releases.".
Add new item "4) closing release;".
4.7.2 Characteristics
Change existing item 1) to read "1) shunt release and undervoltage release (for opening), and
closing release:", keeping dashed items unchanged.
5.2 Marking
Replace the existing text, including all lettered items, by the following new text and Table 13:
Each circuit-breaker shall be marked in a durable manner; data to be provided and
corresponding locations are indicated in Table 13.
– 4 – IEC 60947-2:2016/AMD1:2019
© IEC 2019
Table 13 – Product information
Item Information Marking
location
1.1 rated current (I ) Visible
n
1.2 Visible
suitability for isolation, if applicable, with the symbol (IEC 60617-S00288:2001-07
combined with IEC 60617-S00219:2001-07)
1.3 indication of the open and closed position with O (IEC 60417-5008;2002-10) and I Visible
(IEC 60417-5007;2002-10) respectively, if symbols are used (see 7.1.6.1 of IEC 60947-
1:2007)
2.1 manufacturer’s name or trade mark Marked
2.2 type designation or catalogue reference Marked
2.3 IEC 60947-2, if the manufacturer claims compliance with the standard Marked
2.4 selectivity category A or B Marked
2.5 rated operational voltage(s) U (see 4.3.2.1 and, where applicable, Annex H) Marked
e
2.6 Marked
unsuitability for IT systems, if applicable, with the symbol (IEC 60417-6363:2016-07)
2.7 rated impulse withstand voltage (U ) Marked
imp
2.8 value (or range) of the rated frequency, and/or the indication "d.c." (or the symbol Marked
(IEC 60417-5031:2002-10))
2.9 rated service short-circuit breaking capacity (I ) at the corresponding rated voltage (U ) Marked
cs e
2.10 rated ultimate short-circuit breaking capacity (I ) at the corresponding rated voltage (U ) Marked
cu e
2.11 rated short-time withstand current (I ), and associated short-time delay, for selectivity Marked
cw
category B
a
2.12 range of the current setting (I ) of the adjustable overload release
Marked
r
a
2.13 range of the rated instantaneous short-circuit current setting (I ), for adjustable releases
Marked
i
2.14 reference temperature for non-compensated thermal releases, if different from 30 °C Marked
2.15 terminals identification, according to 7.1.8.4 of IEC 60947-1:2007 Marked
2.16 line and load terminals, if applicable Marked
2.17 neutral pole terminals, if applicable, by the letter N Marked
2.18 protective earth terminal, where applicable, by the symbol Marked
(IEC 60417-5019:2006-08)
(see 7.1.10.3 of IEC 60947-1:2007)
3.1 rated short-circuit making capacity (I ), if higher than that specified in 4.3.6.1 Literature
cm
3.2 rated insulation voltage (U ), if higher than the maximum rated operational voltage Literature
i
3.3 pollution degree if other than 3 Literature
3.4 conventional enclosed thermal current (I ) if different from the rated current Literature
the
3.5 IP code, where applicable (see Annex C of IEC 60947-1:2007/AMD1:2010) Literature
3.6 minimum enclosure size and ventilation data (if any) to which marked ratings apply Literature
3.7 details of minimum distance between circuit-breaker and earthed metal parts for circuit- Literature
breakers intended for use without enclosures
3.8 suitability for environment A or environment B per Annex J, as applicable Literature
3.9 RMS sensing, if applicable, in accordance with F.4.1.1 Literature
3.10 minimum cable cross-section, if different from Table 9 of IEC 60947-1:2007, for ratings Literature
≤ 20 A according to rated ultimate short-circuit breaking capacity I
cu
3.11 values of tightening torque for the circuit-breaker terminals Literature
© IEC 2019
Item Information Marking
location
3.12 current derating for terminals and connections, if applicable Literature
4.1 for closing releases (see 2.23) and/or motor-operators, rated control circuit voltage, kind of Aux
current and rated frequency for a.c.
4.2 rated control circuit voltage of the shunt release and/or of the under-voltage release (or of Aux
the no-voltage release), kind of current and rated frequency for a.c.
4.3 rated current of indirect over-current releases Aux
4.4 number and type of auxiliary contacts, rated operational currents at the rated operational Aux
voltages, and rated frequency for a.c.
Key
Visible: visible from the front when the circuit-breaker is installed as in service and the actuator is
accessible
Marked: marked on the circuit-breaker
Literature: provided in the manufacturer's literature
Aux: marked on the auxiliaries or on the circuit-breaker, if marking space is sufficient; additionally, data
shall be made available in the manufacturer's literature
a
Where applicable, I and I ranges may be displayed instead of being marked on the circuit-breaker.
r i
5.3 Instructions for installation, operation and maintenance
Replace the existing text by the following new text:
Subclause 5.3 of IEC 60947-1:2007/AMD2:2014 applies with the following addition:
Additional information for the decommissioning and dismantling of the circuit-breaker shall be
provided to the user in the case of a foreseeable hazardous condition, for example due to
stored energy or hazardous substances.
7.1.1 General
Replace the existing text by the following new text:
Subclause 7.1 of IEC 60947-1:2007/AMD1:2010/AMD2:2014 applies with the following
modifications:
The requirements of 7.1.2 of IEC 60947-1:2007/AMD1:2010/AMD2:2014 do not apply to parts
with a mass lower than 2 g (insignificant mass, in accordan
...