SIST EN 60947-2:2017/A1:2020

SLOVENSKI STANDARD
SIST EN 60947-2:2017/A1:2020
01-maj-2020
Nizkonapetostne stikalne naprave - 2. del: Odklopniki - Dopolnilo A1 (IEC 60947-
2:2016/A1:2019)
Low-voltage switchgear and controlgear - Part 2: Circuit-breakers (IEC 60947-
2:2016/A1:2019)
Niederspannungsschaltgeräte - Teil 2: Leistungsschalter (IEC 60947-2:2016/A1:2019)
Appareillage à basse tension - Partie 2: Disjoncteurs (IEC 60947-2:2016/A1:2019)
Ta slovenski standard je istoveten z: EN 60947-2:2017/A1:2020
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
SIST EN 60947-2:2017/A1:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60947-2:2017/A1:2020

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SIST EN 60947-2:2017/A1:2020


EUROPEAN STANDARD EN 60947-2:2017/A1

NORME EUROPÉENNE

EUROPÄISCHE NORM
February 2020
ICS 29.130.20

English Version
Low-voltage switchgear and controlgear - Part 2: Circuit-
breakers
(IEC 60947-2:2016/A1:2019)
Appareillage à basse tension - Partie 2: Disjoncteurs Niederspannungsschaltgeräte - Teil 2: Leistungsschalter
(IEC 60947-2:2016/A1:2019) (IEC 60947-2:2016/A1:2019)
This amendment A1 modifies the European Standard EN 60947-2:2017; it was approved by CENELEC on 2019-08-12. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 60947-2:2017/A1:2020 E

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SIST EN 60947-2:2017/A1:2020
EN 60947-2:2017/A1:2020 (E)
European foreword
The text of document 121A/286/FDIS, future IEC 60947-2/A1, prepared by SC 121A "Low-voltage
switchgear and controlgear" of IEC/TC 121 "Switchgear and controlgear and their assemblies for low
voltage" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN 60947-2:2017/A1:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-08-07
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-02-07
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s).
For the relationship with EU Directive(s), see informative Annexes ZZA and ZZB, included in this
document.
Endorsement notice
The text of the International Standard IEC 60947-2:2016/A1:2019 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60364 (series) NOTE Harmonized as HD 60364 (series)
IEC 60364-5-52 NOTE Harmonized as HD 60364-5-52
IEC 60695-2-11:2014 NOTE Harmonized as EN 60695-2-11:2014 (not modified)
IEC 60898-1 NOTE Harmonized as EN 60898-1
IEC 61000-3-2 NOTE Harmonized as EN IEC 61000-3-2
IEC 61000-3-3 NOTE Harmonized as EN 61000-3-3
IEC 61238-1 NOTE Harmonized as EN 61238-1

2

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SIST EN 60947-2:2017/A1:2020
EN 60947-2:2017/A1:2020 (E)
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
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.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Annex ZA of EN 60947-2:2017 applies, except as follows:
Delete from the existing list of Annex ZA of EN 60947-2:20177 the following references:
Publication Year Title EN/HD Year
IEC 60364 Series Low-voltage electrical installations HD 60364 Series
IEC 61000-3-2 - Electromagnetic compatibility (EMC) - EN 61000-3-2 2014
Part 3-2: Limits - Limits for harmonic
current emissions (equipment input current
≤ 16 A per phase)
IEC 61000-3-3 - Electromagnetic compatibility (EMC) - EN 61000-3-3 2013
Part 3-3: Limits - Limitation of voltage
changes, voltage fluctuations and flicker in
public low-voltage supply systems, for
equipment with rated current ≤ 16 A per
phase and not subject to conditional
connection
CISPR 22 - Information technology equipment - Radio EN 55022 2010
disturbance characteristics - Limits and
+ AC 2011
methods of measurement
Replace the existing references of the following list by the following new references:
IEC 60269-1 2006 Low-voltage fuses - Part 1: General EN 60269-1 2007
requirements
  +A1 2009
  +A2 2014
IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) – Part EN 61000-4-2 2008
4-2: Testing and measurement techniques
– Electrostatic discharge immunity test
3

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SIST EN 60947-2:2017/A1:2020
EN 60947-2:2017/A1:2020 (E)
Publication Year Title EN/HD Year
IEC 61000-4-11 - Electromagnetic compatibility (EMC) - EN 61000-4-11 2004
Part 4-11: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations
immunity tests
IEC 61140 2016 Protection against electric shock - EN 61140 2016
Common aspects for installation and
equipment
CISPR 11 2015 Industrial, scientific and medical equipment EN 55011 2016
- Radio-frequency disturbance (modified)
characteristics - Limits and methods of
measurement
+A1 2016 +A1 2017
Add the following new references as follows:
IEC 60228 - Conductors of insulated cables EN 60228 2005
+ AC 2005
1
IEC 61545 1996 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 EN 55032 2015
equipment – Emission requirements
+ AC 2016

1
Dated as no equivalent European Standard exists.
4

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SIST EN 60947-2:2017/A1:2020
EN 60947-2:2017/A1:2020 (E)
Annex ZZA
(informative)

Relationship between this European standard and the essential
requirements of Directive 2014/30/EU [2014 OJ L96] aimed to be
covered and the standardisation request M/552
This European standard has been prepared under the European Commission standardisation request
12
C(2016) 7641 final of 30.11.2016 , ('M/552'), as regards harmonised standards in support of Directive
2014/30/EU relating to electromagnetic compatibility, to provide one voluntary means of conforming to
essential requirements of Directive 2014/30/EU of the European Parliament and of the Council of 26
February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic
compatibility [2014 OJ L96].
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZZA.1 confers, within the limits
of the scope of this standard, a presumption of conformity with the corresponding essential
requirements of that Directive, and associated EFTA regulations.
Table ZZA.1 — Correspondence between this European standard and the Essential
Requirements set out in Directive 2014/30/EU [2014 OJ L96]
Essential requirements of Clause(s) / sub-clause(s) Remarks / Notes
Directive 2014/30/EU of this EN
Annex I. 1(a) (electromagnetic 7.3, B.7.3, B.8.13.2, F.5, J.1, Full coverage of requirements
disturbances) for conducted and radiated
J.3, M.7.2.12, M.8.16.2, N.3,
disturbances in the range
P.7.3
150 kHz to 6 GHz
Annex H of EN 55011 shall not
be applied in conjunction with
the emission limits specified in
J.3 for the purposes of the
presumption of conformance.
Annex I. 1(b) (electromagnetic 7.3, B.7.3, B.8.13.1, F.2.2, F.3,
immunity)
F.4, J.1, J.2, M.7.2.12,
M.8.16.1, N.1, N.2, P.7.3
WARNING 1: Presumption of conformity stays valid only as long as a reference to this European
standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2: Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.


2
COMMISSION IMPLEMENTING DECISION C(2016) 7641 final of 30.11.2016 on a standardisation request to
the European Committee for Standardisation, to the European Committee for Electrotechnical Standardisation
and to the European Telecommunications Standards Institute as regards harmonised standards in support of
Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of
the laws of the Member States relating to electromagnetic compatibility
5

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SIST EN 60947-2:2017/A1:2020
EN 60947-2:2017/A1:2020 (E)
Annex ZZB
(informative)

Relationship between this European standard and the safety
objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be
covered
This European Standard has been prepared under a Commission’s standardization request relating to
harmonized standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means
of conforming to safety objectives of Directive 2014/35/EU of the European Parliament and of the
Council of 26 February 2014 on the harmonization of the laws of the Member States relating to the
making available on the market of electrical equipment designed for use within certain voltage limits
[2014 OJ L96].
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZZB.1 confers, within the limits
of the scope of this standard, a presumption of conformity with the corresponding safety objectives of
that Directive, and associated EFTA regulations.
Table ZZB.1 — Correspondence between this European standard and Annex I of Directive
2014/35/EU [2014 OJ L96]
Safety objectives of Clause(s) / sub-clause(s) of this Remarks/note
Directive 2014/35/EU EN
1 a) Foreword, 1.1, 4, 5, B.5, D.5, H.5,
L.5, M.5, O.5, P.5, R.5, Annex K
1 b) 5, D.5, L.5, M.5, O.4, P.5
1 c) 1.1, 2.1, 5.3 Refer to 2 a) to 2 d) and 3
a) to 3 c) in this table.
2 a) 5.2, 5.3, 7.1.3, 7.1.4, 7.2.3,
8.3, 8.4
2 b) 7.2.2, 7.3, 8.3.2, F.1, J.3, D.8
2 c) 5.3, 7.1, 7.1.2, 7.1.3, 7.1.5,
7.2.1, 7.3, 8.3.3 to 8.3.6,
8.4, 8.5, F.1, J.2, J.3, Annex D
2 d) 5.2, 7.1.3, 7.1.4, 7.2.3,
8.3.2, F.2.2, B.7, M.7
3 a) 5.3, 7.1.2, 7.1.5, 7.2.1,
8.3.3 to 8.3.6, 8.4, 8.5, B.7, M.7
3 b) 7.3, F.1, J.3, Annex D
3 c) 1.1, 7.2, 8.3
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
6

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SIST EN 60947-2:2017/A1:2020
EN 60947-2:2017/A1:2020 (E)
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
7

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SIST EN 60947-2:2017/A1:2020

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SIST EN 60947-2:2017/A1:2020



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




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60947-2:2017/A1:2020
– 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

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SIST EN 60947-2:2017/A1:2020
IEC 60947-2:2016/AMD1:2019 – 3 –
© 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.

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SIST EN 60947-2:2017/A1:2020
– 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

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SIST EN 60947-2:2017/A1:2020
IEC 60947-2:2016/AMD1:2019 – 5 –
© 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 accordance with 3.14 of
IEC 60695-2-11:2014). For products containing a plurality of small parts, the total mass of
non-tested parts located in close proximity to each other shall not exceed 10 g. Proximity shall
be based on engineering judgment that takes into consideration the risk of propagation of fire.
Where, in 7.1.2.2 of IEC 60947-1:2007/AMD1:2010/AMD2:2014, the test temperature is to be
specified, the value required by this document for the parts necessary to retain in position
current-carrying parts is:
– 960 °C for the main circuit;
– 850 °C for the other circuits.
7.2.2.3 Main circuit
Replace the existing text by the following new text:

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SIST EN 60947-2:2017/A1:2020
– 6 – IEC 60947-2:2016/AMD1:2019
© IEC 2019
The main circuit of a circuit-breaker, including the over-current releases that may be
associated with it, shall be capable of carrying its rated current I , under the conditions of
n
Clause 8, without the temperature rises exceeding the limits specified in Table 7.
8.3 Type tests
Replace the last existing paragraph by the following new paragraph:
In order to facilitate locating a particular test condition or test, an alphabetical index is given
below, using the terms most likely to be used (not necessarily the exact terms appearing in
the relevant subclause heading).
8.3.1.3 Applicability of sequences according to the relationship between short-circuit
ratings
Replace, in the alphabetical index of tests, in line "Overload releases (verification)", reference
"8.3.4.5" by "8.3.4.6".
a
Table 9 – Overall schema of test sequences
nd
Replace, in test sequence IV row, the existing text of 2 column by the following new text:
b
Circuit-breakers of selectivity category B and circuit-breakers of selectivity category A with
an assigned short-time withstand current (see 4.4)
Table 9b – Applicability of tests or test sequences to 1, 2 and 4-pole circuit-breakers
according to the alternative programme 1 of 8.3.1.4
c
Replace the existing text of the table footnote " " by the following new text:
C
Test at maximum kVA rating (I × corresponding U ).
cu e
Table 9c – Applicability of tests or test sequences to 1, 2 and 3-pole circuit-breakers
according to the alternative programme 2 of 8.3.1.4
c
Replace the existing text of the table footnote " " by the following new text:
C
Test at maximum kVA rating (I × corresponding U ).
cu e
8.3.2.1 General requirements
Replace the existing second paragraph after the note by the following new paragraph:
For the tests in free air concerning overload performance, short-circuit, and short-time
withstand current where applicable, a metallic screen shall be placed on all sides of the
circuit-breaker in accordance with the manufacturer’s instructions. Details, including distances
of the metallic screen from the circuit-breaker, shall be stated in the test report.
Replace the existing fifth paragraph before Table 10 by the following:
The tightening torques to be applied to the terminal screws shall be in accordance with the
manufacturer's instructions (see Table 13, item 3.11).
Table 10 – Number of samples for test
“e”
Replace, in the existing table footnote , “test” by “testing.

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SIST EN 60947-2:2017/A1:2020
IEC 60947-2:2016/AMD1:2019 – 7 –
© IEC 2019
8.3.2.5 Test conditions for temperature-rise tests
Replace the existing fifth paragraph by the following:
For four-pole circuit-breakers, a test shall first be carried out on the 3-phase poles; for the
neutral pole, the additional single-phase test of 8.3.3.3.4 of IEC 60947-1:2007 applies only
when there is a construction break between the neutral pole and the phase poles (see 7.1.6),
in which case the test current is the rated current of the neutral pole.
8.3.2.6.4.2 Tests on one-, two- and three-pole circuit-breakers
Replace the existing title of this subclause by the following new title:
8.3.2.6.4.2 Common tests on one-, two-, three- and four-pole circuit-breakers
8.3.2.6.4.3 Tests on four-pole circuit-breakers
Replace the existing title of this subclause by the following new title:
8.3.2.6.4.3 Additional tests on four-pole circuit-breakers
Delete the existing first paragraph.
Replace the existing second and third paragraphs by the following new paragraphs:
Additional sequences of operations on one or more new samples, in accordance with
Table 10, shall be carried out on the fourth pole and its adjacent pole, according to test
sequences III or V, as applicable, and test sequence IV if applicable. This requirement applies
even when test sequence III is replaced by test sequence II (I = I ) or test sequence IV is
cu cs
replaced by test sequence VI (I = I ), i.e., additional tests according to test sequence III or
cw cs
V, and test sequence IV, as applicable, are required.
Alternatively, at the request of the manufacturer, these tests may be combined with the tests
of 8.3.2.6.4.2 and made on the same samples, in which case the test in each relevant test
sequence shall comprise
– the test on three adjacent poles,
– the test on the fourth pole and the adjacent pole.
8.3.3.2.2 Short-circuit releases
Replace, in the existing fifth paragraph, third sentence, "indivudal" by "individual".
8.3.3.2.3 Overload releases
a) Instantaneous or definite time-delay releases
Replace, in the existing last paragraph, "(see 8.3.3.2.3)" by "(see 8.3.3.2.1)".
b) Inverse time-delay releases
Replace, in the existing second paragraph, "(see 8.3.3.2.4)" by "(see 8.3.3.2.1)".
Replace, in the existing third paragraph, "see 4.7.3 and 5.2 item b)" by "see 4.7.3 and
Table 13 item 2.14".
8.3.3.4.2.2 Mechanical operation
Replace, in the existing first dashed item, "closing device" with "closing release".

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SIST EN 60947-2:2017/A1:2020
– 8 – IEC 60947-2:2016/AMD1:2019
© IEC 2019
8.3.3.4.3 Operational performance capability without current
th
Replace, in the existing second sentence of the 7 paragraph, "closing devices" with "closing
releases".
8.3.3.4.4 Operational performance capability with current
th
Replace, in the existing second sentence of the 6 paragraph, "closing devices" with "closing
releases".
8.3.3.6.2 Test voltage
Replace the existing first paragraph with the following:
Subclause 8.3.3.4.1, item 4) b), of IEC 60947-1:2007/AMD1:2010 applies.
...