EN 60947-1:2007/A2:2014

SLOVENSKI STANDARD
01-junij-2015
Nizkonapetostne stikalne naprave - 1. del: Splošna pravila - Dopolnilo A2
Low-voltage switchgear and controlgear - Part 1: General rules
Niederspannungsschaltgeräte - Teil 1: Allgemeine Festlegungen
Appareillage à basse tension - Partie 1: Règles générales
Ta slovenski standard je istoveten z: EN 60947-1:2007/A2:2014
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60947-1:2007/A2

NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2014
ICS 29.130.20
English Version
Low-voltage switchgear and controlgear -
Part 1: General rules
(IEC 60947-1:2007/A2:2014)
Appareillage à basse tension -  Niederspannungsschaltgeräte -
Partie 1: Règles générales Teil 1: Allgemeine Festlegungen
(CEI 60947-1:2007/A2:2014) (IEC 60947-1:2007/A2:2014)
This amendment A2 modifies the European Standard EN 60947-1:2007; it was approved by CENELEC on 2014-10-14. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60947-1:2007/A2:2014 E

Foreword
The text of document 121A/15/FDIS, future IEC 60947-1:2007/A2, 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
The following dates are fixed:
(dop) 2015-07-14
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2017-10-14
standards conflicting with the
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 [and/or CEN] 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.

For the relationship with EU Directive see informative Annex ZZ, which is an integral part of this
document.
This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment
Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC).

Endorsement notice
The text of the International Standard IEC 60947-1:2007/A2:2014 was approved by CENELEC as a
European Standard without any modification.
In the Bibliography of EN 60947-1:2007, the following notes have to be added for the standards indicated:

IEC 60695-11-5 NOTE Harmonized as EN 60695-11-5.
IEC 60947-3:2008 NOTE Harmonized as EN 60947-3:2009 (not modified).
IEC 60947-3:2008/A1:2012 NOTE Harmonized as EN 60947-3:2009/A1:2012 (not modified).
IEC 60947-4-1:2009 NOTE Harmonized as EN 60947-4-1:2010 (not modified).
IEC 60947-4-1:2009/A1:2012 NOTE Harmonized as EN 60947-4-1:2010/A1:2012 (not modified).
IEC 60947-4-2:2011 NOTE Harmonized as EN 60947-4-2:2012 (not modified).
1)
IEC 60947-4-3:1999 NOTE Harmonized as EN 60947-4-3:2000 (not modified).
1)
IEC 60947-4-3:1999/A1:2006 NOTE Harmonized as EN 60947-4-3:2000/A1:2006 (not modified).
1)
IEC 60947-4-3:1999/A2:2011 NOTE Harmonized as EN 60947-4-3:2000/A2:2011 (not modified).
IEC 60947-5-2:2007 NOTE Harmonized as EN 60947-5-2:2007 (not modified).
IEC 60947-5-2:2007/A1:2012 NOTE Harmonized as EN 60947-5-2:2007/A1:2012 (not modified).
IEC 60947-6-1:2005 NOTE Harmonized as EN 60947-6-1:2005 (not modified).
IEC 60947-6-1:2005/A1:2013 NOTE Harmonized as EN 60947-6-1:2005/A1:2014 (not modified).

1)
Superseded by EN 60947-4-3:2014 (IEC 60947-4-3:2014).

- 3 - EN 60947-1:2007/A2:2014
IEC 60947-6-2:2002 NOTE Harmonized as EN 60947-6-2:2003 (not modified).
IEC 60947-6-2:2002/A1:2007 NOTE Harmonized as EN 60947-6-2:2003/A1:2007 (not modified).
IEC 61095:2009 NOTE Harmonized as EN 61095:2009 (not modified).
IEC 61439 Series NOTE Harmonized as EN 61439 Series (not modified).
IEC 61508-6 NOTE Harmonized as EN 61508-6.
CISPR 22 NOTE Harmonized as EN 55022.
ISO 50001 NOTE Harmonized as EN ISO 50001.

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

Annex ZA of EN 60947-1:2007 applies, except as follows:

Publication Year Title EN/HD Year
Delete from the Annex ZA of EN 60947-1:2007 "IEC 60439-1:1999 and its
amendment A1:2004".
Replace the existing references of the following list by the following new references:
IEC 60664-1 2007 Insulation coordination for equipment EN 60664-1 2007
within low-voltage systems -
Part 1: Principles, requirements and tests
IEC 61000-3-3 2013 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
IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) - EN 61000-4-2 2009
Part 4-2: Testing and measurement
techniques - Electrostatic discharge
immunity test
IEC 61000-4-4 2012 Electromagnetic compatibility (EMC) - EN 61000-4-4 2012
Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst
immunity test
IEC 61000-4-6 2013 Electromagnetic compatibility (EMC) - EN 61000-4-6 2014
Part 4-6: Testing and measurement
techniques - Immunity to conducted
disturbances, induced by radio-frequency
fields
IEC 61000-4-8 2009 Electromagnetic compatibility (EMC) - EN 61000-4-8 2010
Part 4-8: Testing and measurement
techniques - Power frequency magnetic
field immunity test
CISPR 11 (mod) 2009 Industrial, scientific and medical EN 55011 2009
equipment - Radio-frequency disturbance
+A1 2010 +A1 2010
characteristics - Limits and methods of
measurement
- 5 - EN 60947-1:2007/A2:2014
Add, to the existing references the new amendments as follows:
IEC 60947-5-1 2003 Low-voltage switchgear and controlgear - EN 60947-5-1 2004
Part 5-1: Control circuit devices and + corr. November 2004
switching elements - Electromechanical + corr. July 2005
control circuit devices
+A1 2009 +A1 2009
IEC 61000-3-2 2005 Electromagnetic compatibility (EMC) - EN 61000-3-2 2006
Part 3-2: Limits - Limits for harmonic
+A1 2008 +A1 2009
current emissions (equipment input current
+A2 2009 +A2 2009
≤ 16 A per phase)
IEC 61000-4-3 2006 Electromagnetic compatibility (EMC) - EN 61000-4-3 2006
Part 4-3: Testing and measurement
+A1 2007 +A1 2008
techniques - Radiated, radio-frequency,
+A2 2010 +A2 2010
electromagnetic field immunity test
IEC 61000-4-13 2002 Electromagnetic compatibility (EMC) - EN 61000-4-13 2002
Part 4-13: Testing and measurement
+A1 2009 +A1 2009
techniques - Harmonics and
interharmonics including mains signalling
at a.c. power port, low frequency immunity
tests
Add the following new references as follows:
IEC 60092-504 2001 Electrical installations in ships - - -
Part 504: Special features - Control and
instrumentation
IEC 60300-3-5 2001 Dependability management - - -
Part 3-5: Application guide - Reliability test
conditions and statistical test principles
IEC 61508 Series Functional safety of EN 61508 Series
electrical/electronic/programmable
electronic safety-related systems
IEC 61649 2008 Weibull analysis EN 61649 2008
IEC 62061 2005 Safety of machinery - Functional safety of EN 62061 2005
safety-related electrical, electronic and + corr. February 2010
programmable electronic control systems
IEC 62430 2009 Environmentally conscious design for EN 62430 2009
electrical and electronic products
IEC 62474 2012 Material declaration for products of and for EN 62474 2012
the electrotechnical industry
ISO 13849-1 2006 Safety of machinery - Safety-related parts EN ISO 13849-1 2008
of control systems -
Part 1: General principles for design

Replace Annex ZZ by the following new one:

Annex ZZ
(informative)
Coverage of Essential Requirements of EU Directives
This European Standard has been prepared under a mandate given to CENELEC by the
European Commission and the European Free Trade Association and within its scope the
standard covers protection requirements of Annex I Article 1 of the EU Directive 2004/108/EC.
Compliance with this standard provides presumption of conformity with the specified essential
requirements of the Directives concerned.
NOTE: Other requirements and other EU Directives may be applicable to the products falling
within the scope of this standard.

IEC 60947-1 ®
Edition 5.0 2014-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
A MENDMENT 2
AM ENDEMENT 2
Low-voltage switchgear and controlgear –

Part 1: General rules
Appareillage à basse tension –

Partie 1: Règles générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XA
ICS 29.130.20 ISBN 978-2-8322-1798-6

– 2 – IEC 60947-1:2007/AMD2:2014
© IEC 2014
FOREWORD
This amendment has been prepared by subcommittee 17B: Low-voltage switchgear and
controlgear, of IEC technical committee 17: Switchgear and controlgear.
The text of this amendment is based on the following documents:
FDIS Report on voting
121A/15/FDIS 121A/21/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 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
_____________
1.1 Scope and object
Replace the existing text of this subclause by the following new text:
This standard applies, when required by the relevant product standard, to low-voltage
switchgear and controlgear hereinafter referred to as "equipment" or "device" and 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.
This standard states the general rules and common safety requirements for low-voltage
switchgear and controlgear, including:
– definitions;
– characteristics;
– information supplied with the equipment;
– normal service, mounting and transport conditions;
– constructional and performance requirements;
– verification of characteristics and performance;
– environmental aspects.
IEC 60947-1:2007/AMD2:2014 – 3 –
© IEC 2014
This standard does not apply to low-voltage switchgear and controlgear assemblies which are
dealt with in IEC 61439 series, as applicable.
1.2 Normative references
Delete the existing reference to "IEC 60439-1:1999" and its Amendment 1.
Replace the existing references by the following new references:
IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 61000-3-3:2013, Electromagnetic compatibility (EMC) – 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
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
IEC 61000-4-4:2012, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
measurement techniques – Electrical fast transient/burst immunity test
IEC 61000-4-6:2013, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
IEC 61000-4-8:2009, Electromagnetic compatibility (EMC) – Part 4-8: Testing and
measurement techniques – Power frequency magnetic field immunity test
CISPR 11:2009, Industrial, scientific and medical equipment – Radio-frequency disturbance
characteristics – Limits and methods of measurement
Amendment 1 (2010)
Add, to the existing references, the new amendments as follows:
IEC 60947-5-1:2003, Low-voltage switchgear and controlgear – Part 5-1: Control circuit
devices and switching elements – Electromechanical control circuit devices
Amendment 1 (2009)
IEC 61000-3-2:2005, Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for
harmonic current emissions (equipment input current ≤ 16 A per phase)
Amendment 1 (2008)
Amendment 2 (2009)
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and
measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test
Amendment 1 (2007)
Amendment 2 (2010)
IEC 61000-4-13:2002, Electromagnetic compatibility (EMC) – Part 4-13: Testing and
measurement techniques – Harmonics and interharmonics including mains signalling at a.c.
power port, low-frequency immunity tests
Amendment 1 (2009)
Add the following new normative references as follows:

– 4 – IEC 60947-1:2007/AMD2:2014
© IEC 2014
IEC 60092-504:2001, Electrical installations in ships – Part 504: Special features – Control
and instrumentation
IEC 60300-3-5:2001, Dependability management – Part 3-5: Application guide – Reliability
test conditions and statistical test principles
IEC 61508 (all parts), Functional safety of electrical/electronic/programmable electronic
safety-related systems
IEC 61649:2008, Weibull analysis
IEC 62061:2005, Safety of machinery – Functional safety of safety-related electrical,
electronic and programmable electronic control systems
IEC 62430:2009, Environmentally conscious design for electrical and electronic products
IEC 62474:2012, Material declaration for products of and for the electrotechnical industry
ISO 13849-1:2006, Safety of machinery – Safety-related parts of control systems – Part 1:
General principles for design
2 Definitions
Replace, in the alphabetical list, the existing references to these terms, modified by
Amendment 1, by the following new references:
Electronically controlled electromagnet . 2.3.36
Maximum cross-section . 2.3.35
Minimum cross-section . 2.3.34
Multiple tip contact system . 2.3.33
Replace, in the alphabetical list, the entry "Over-current discrimination" by the following new
entry:
Over-current selectivity . 2.5.23
Add, in the alphabetical list, the following new terms and references:
Flexible conductor . 2.3.32
Individual enclosure . 2.2.23
Insulation coordination barrier . 2.1.23
Rated control circuit supply voltage . 2.5.67
Rated control circuit voltage . 2.5.66
Rigid conductor . 2.3.31
Solid conductor . 2.3.29
Solid insulation . 2.1.22
Stranded conductor . 2.3.30

2.1 General terms
Add, at the end of the existing subclause, the following new terms and definitions:
2.1.22
solid insulation
solid insulating material interposed between two conductive parts

IEC 60947-1:2007/AMD2:2014 – 5 –
© IEC 2014
2.1.23
insulation coordination barrier
solid insulating material that is not an integral part, provided for the purpose of increasing
either creepage distances or clearance distances or both
2.2 Switching devices
Add, at the end of the existing subclause, the following new term and definition:
2.2.23
individual enclosure
enclosure designed and dimensioned to contain one equipment only
2.3 Parts of switching devices
Add, after the existing definition 2.3.28 added by Amendment 1, the following new terms and
definitions and renumber the existing definitions 2.3.29 to 2.3.32 as 2.3.33 to 2.3.36
respectively:
2.3.29
solid conductor
conductor consisting of a single wire
NOTE 1 The solid conductor may be circular or shaped.
NOTE 2 Solid conductor is defined as class 1 conductor in IEC 60228, or by IEC 60344, or equivalent AWG/kcmil.
[461-01-06, modified]
2.3.30
stranded conductor
conductor consisting of a number of wires, all or some of which are wound in a helix
NOTE Stranded conductor is defined as class 2 conductor in IEC 60228, or by IEC 60344, or equivalent
AWG/kcmil.
[151-12-36, modified]
2.3.31
rigid conductor
solid or stranded conductor having wires of such diameters, or so assembled, that the
conductor is not suitable for use in a flexible cable
2.3.32
flexible conductor
stranded conductor having wires of diameters small enough and so assembled that the
conductor is suitable for use in a flexible cable
NOTE Flexible conductor is defined as class 5 or class 6 conductor in IEC 60228, or by IEC 60344, or equivalent
AWG/kcmil.
[461-01-11, modified]
2.5 Characteristic quantities
2.5.23
over-current discrimination
Replace the existing term by the new following term:

– 6 – IEC 60947-1:2007/AMD2:2014
© IEC 2014
over-current selectivity
Replace, in the existing note of this definition, the word “discrimination” by “selectivity”.
Delete the existing source "[441-17-15]".
Add, after the existing definition 2.5.65, the following new terms and definitions:
2.5.66
rated control circuit voltage
U
c
rated voltage which is controlling the input signal of the control device
2.5.67
rated control circuit supply voltage
U
s
rated voltage applied to energize the power supply terminals of the control circuit
4 Characteristics
Add, in the existing table, the following new line:
Characteristic Symbol Subclause
Pole impedance of the switching device Z 4.3.7

Replace, in the existing line "Rated conditional short-circuit current", the symbol " – " by " I ",
q
as follows:
Characteristic Symbol Subclause
Rated conditional short-circuit current I 4.3.6.4
q
Replace the existing line “Rated control supply voltage” as follows:
Characteristic Symbol Subclause
Rated control circuit supply voltage U 4.5.1
s
4.3.6.1 Rated short-time withstand current (I )
cw
Replace the existing text of this subclause by the following new text:
The rated short-time withstand current of an equipment is the value of short-time current,
assigned to the equipment by the manufacturer, that the equipment can carry without
damage, under the test conditions specified in the relevant product standard.
4.3.6.4 Rated conditional short-circuit current
Replace the existing title of this subclause by the following new title:
4.3.6.4 Rated conditional short-circuit current (I )
q
Add, before the existing Subclause 4.4, the following new subclause:

IEC 60947-1:2007/AMD2:2014 – 7 –
© IEC 2014
4.3.7 Pole impedance of the switching device (Z)
The pole impedance may be stated by the manufacturer and is determined by measuring the
voltage drop resulting from the current flowing through the pole.
4.5.1 Electrically or electronically controlled circuits
Replace the existing fourth dashed item, modified by Amendment 1, by the following new
dash:
– rated control circuit supply voltage U (a.c., d.c.), where applicable;
s
Replace the existing Note 1 added by Amendment 1 by the following new note:
NOTE 1 Distinction is made between the rated control circuit voltage U and the rated control circuit supply
c
voltage U which may be different from U due to the presence of built-in transformers, rectifiers, resistors,
s c
electronic circuitry, etc.
Delete the existing Note 2 added by Amendment 1.
Replace the existing paragraph after Note 2, added by Amendment 1, by the following new
paragraph:
The correct operating conditions are based upon a value of the control circuit supply voltage
not less than 85 % of its rated value U , with the highest value of control circuit current
s
flowing, nor more than 110 % of its rated value.
5.1 Nature of information
Replace the existing eighteenth dashed item under “Characteristics” by the following new
dash:
– control circuit supply voltage, kind of current and frequency, if different from those of the
control coil;
Add, in the existing list “Characteristics” after the item “suitability for isolation”, the following
two new dashed items:
– pole impedance of the switching device (Z);
– material declaration as per Annex W;
5.3 Instructions for installation, operation and maintenance
Move the first sentence of the second existing paragraph to the end of the first paragraph.
Replace the second sentence of the second paragraph by the following new sentence:
For equipment only suitable in environment A (see 7.3.1), the manufacturer shall provide the
following notice in documentation, available as information to potential customers and with the
product for users:
Add, after the existing Subclause 5.3, the following new subclause:
5.4 Environmental information
Material declarations according to Annex W shall be provided if required by the relevant
product standard.
– 8 – IEC 60947-1:2007/AMD2:2014
© IEC 2014
6.1.1 Ambient air temperature
Replace, in the existing Note 1 “IEC 60439-1” by “IEC 61439 series”.
7.1.2.2 Glow wire testing
Replace, in the existing note, "IEC 60695-2-2" by "IEC 60695-11-5".
Add, at the end of existing note, the following new sentence:
The needle flame test is used as an alternative test for addressing flame retardancy requirements for shipboard
applications.
7.1.4 Clearances and creepage distances
Replace the existing text of this subclause by the following new three subclauses:
7.1.4.1 General
For equipment tested according to 8.3.3.4 of this standard, minimum values are given in
Table 13 and Table 15.
Electrical requirements are given in 7.2.3.
In the other cases, guidance for minimum values is given in the relevant product standard.
NOTE Depending on the risk level (severity of harm and the probability of occurrence), the non-accessibility to
hazardous-live parts is considered under normal service conditions (see 6.1) or under single-fault conditions (see
4.2 of IEC 61140:2001, 7.1.10 and Annex N).
7.1.4.2 Insulation coordination barriers for creepage distances
When solid insulation is used as an insulation coordination barrier to comply with required
creepage distances, the material used shall comply with the glow wire requirements in 7.1.2.2
or the flammability requirements in 7.1.2.3.
7.1.4.3 Insulation coordination barriers for clearance distances
When solid insulation is used as an insulation coordination barrier to comply with required
clearance distances and does not physically support or maintain the relative position of
uninsulated parts involved, the barrier material shall comply with the glow wire requirements
in 7.1.2.2 and shall conform to the glow-wire test requirements of 8.2.1.1.1 at a temperature
of 650 °C or the AI values in Table M.2. Alternatively the material shall comply with the
requirements in 7.1.4.2.
7.2.1.2 Limits of operation of power operated equipment
Replace, in the first existing paragraph, “control supply voltage” by “control circuit supply
voltage”.
Replace, in the existing paragraph, after the note, “rated control supply voltage” by “rated
control circuit supply voltage”.
Replace, in the first (one occurrence) and second dashed items (two occurrences) of the fifth
existing paragraph, introduced by Amendment 1, “rated control supply voltage” by “rated
control circuit supply voltage”.

IEC 60947-1:2007/AMD2:2014 – 9 –
© IEC 2014
7.2.1.4 Limits of operation of shunt releases
Replace, in the existing paragraph, “rated control supply voltage” by “rated control circuit
supply voltage”.
7.2.2.5 Control circuits
Add, after the existing text, the following new paragraph:
Digital inputs and/or digital outputs contained in switchgear and controlgear, and intended to
be compatible with programmable logic controllers (PLCs) are covered by Annex S.
7.2.2.8 Other parts
Replace, in the existing text, "plastics and insulating materials" by "insulating parts".
7.2.3.3 Clearances
Replace, in the second sentence of the second paragraph, "are higher than" by "are equal to
or higher than".
7.2.3.5 Solid insulation
Delete the last existing sentence of this subclause.
Add, at the end of this subclause, the following new note:
NOTE For more information on the design of solid insulation, see 5.3.1 of IEC 60664-1:2007.
Add, before the existing Subclause 7.3, the following new subclause:
7.2.8 Pole impedance
Where the pole impedance is given, it shall be tested according to 8.3.3.8.
7.3.3.1 Equipment not incorporating electronic circuits
Replace the existing text of this subclause by the following new text:
The requirements for electromagnetic emissions for equipment not incorporating electronic
circuits are deemed to be satisfied, and no verification is necessary.
NOTE For equipment not incorporating electronic circuits, electromagnetic disturbances can only be generated by
equipment during occasional switching operations. The duration of the disturbances is less than 200 ms in accordance
with CISPR 22.
The frequency, the level and the consequences of these emissions are considered as part of
the normal electromagnetic environment of low-voltage installations.
7.3.3.2.1 Limits for high-frequency emissions
Replace the first three existing paragraphs of this subclause by the following new text and
new note:
The high-frequency (greater than 9 kHz) continuous emissions from equipment incorporating
electronic switching circuits shall not exceed the limits specified in the relevant product
standard, based on CISPR 11 for environment A and for environment B.
NOTE One-time disturbances no longer than 200 ms need no further evaluation.

– 10 – IEC 60947-1:2007/AMD2:2014
© IEC 2014
8.2 Compliance with constructional requirements
th
Replace, in the 4 existing dash of the list, “the mechanical properties of terminals” by “the
mechanical and electrical properties of terminals”.
8.2.4.1 General conditions for tests
Replace, in the second sentence, the reference to "IEC 60028" by "IEC 60228".
8.2.4.7 Electrical performance of screwless-type clamping units
Replace, in the existing Note 1 introduced by Amendment 1, the references "(2.3.30)" and
"(2.3.31)" by "(2.3.24)" and "(2.3.35)" respectively.
Replace the existing Note 2 introduced by Amendment 1 by the following new note:
NOTE 2 For the largest cross-sectional area the test current generally applied is I or I declared for the
th the
product. For the smallest cross-sectional area, the test current is given in Table 4 and Table 5 of IEC 60947-7-
1:2009.
8.2.4.8 Ageing test for screwless-type clamping units
Replace, in the existing Note 1 introduced by Amendment 1, the references "(2.3.30)" and
"(2.3.31)" by "(2.3.34)" and "(2.3.35)" respectively.
Replace the existing Note 2 introduced by Amendment 1 by the following new note :
NOTE 2 For the largest cross-sectional area the test current generally applied is I or I declared for the
th the
product. For the smallest cross-sectional area, the test current is given in Table 4 and Table 5 of IEC 60947-7-
1:2009.
8.3.2 General test conditions
Replace, in the existing note, “IEC 60439” by “IEC 61439 series”.
8.3.2.1 General requirements
Delete the existing note.
8.3.2.2.3 Recovery voltage
Replace, in the existing Note 1, "system voltage" by "supply network voltage".
8.3.3.2.1 Power operated equipment
Replace, in the second existing paragraph, introduced by Amendment 1, “rated control supply
voltage” by “rated control circuit supply voltage”.
Replace the fifth existing paragraph added by Amendment 1 by the following new paragraph:
The value of the capacitor shall be
C = 30 + 200 000 / (f × U)
where
C is expressed in nF;
f is the minimum rated frequency expressed in Hz;
U is the maximum value of U expressed in V.
s
IEC 60947-1:2007/AMD2:2014 – 11 –
© IEC 2014
8.3.3.3.1 Ambient air temperature
Replace the second existing paragraph by the following new paragraph:
During the test, the ambient temperature shall be between +10 °C and +40 °C and shall not
vary by more than 10 K. The ambient temperature shall not vary by more than 3 K during the
last quarter of the test or the last hour of the test, whichever is the shorter. The test shall be
conducted until this condition is achieved.
Delete the third existing paragraph of this subclause.
8.3.3.4.1 Type tests
Delete Note 2 in the existing item 1).
Renumber, in the existing item 1), “Note 3” and “Note 4” added by Amendment 1 as “Note 2”
and “Note 3” respectively.
Replace, in the existing item 3) c), the text modified by Amendment 1 by the following new
text and new note:
The test voltage shall be applied to for 60 s in accordance with items i), ii) and iii) of 2) c)
above.
NOTE For devices already type-tested according to this standard and its Amendment 1 or earlier, a re-testing
according to 60 s is not necessary.
Replace, in the existing item 6), the existing text “Under consideration” by "Equipment with
d.c. ratings only shall be tested with d.c. test voltage".
Add, before the existing Subclause 8.3.4, the following new subclause:
8.3.3.8 Pole impedance
The pole impedance shall be determined during the test and with the conditions given in
8.3.3.3.4. The test in an enclosure is not deemed necessary even if the switching device can
be used in an individual enclosure.
The voltage drop U shall be measured between the line and load terminals (terminals
d
included) of the switching device using the same measuring points as for the temperature
rise. The measurement shall be performed after a time sufficient for the temperature-rise to
reach a steady-state value.
The impedance per pole is defined as follows:
Z = U / I [Ω]
d th
The declared value (see 5.1 modified by this Amendment 2), in the case of multiple identical
poles, shall be the average value obtained from the tests.
Care should be taken that voltage drop measurement does not significantly affect the
temperature rise nor affect significantly the impedance.
NOTE The method is the same irrespective of the number of poles of the switching device.
8.4 Tests for EMC
Replace the existing text of this subclause by the following new text:

– 12 – IEC 60947-1:2007/AMD2:2014
© IEC 2014
Emission and immunity tests are type tests and shall be carried out using the manufacturer’s
instructions for installation in accordance with the reference EMC standards.
The product standard shall specify any particular test condition (e.g. use of an enclosure) and
additional measures necessary to verify the performance criteria of the product (e.g.
application of dwell times).
Add, before the existing Subclause 8.4.2, the following new subclause:
8.4.1.2.9 Harmonics in the supply
Under consideration.
Table 1 – Standard cross-sections of round copper conductors and approximate
relationship between mm and AWG/kcmil sizes
Replace, in the existing title of this table, “Standard” by “Nominal” and in the header of this
table “Rated” by “Nominal”.
Table 3 – Temperature-rise limits of accessible parts (see 7.2.2.2 and 8.3.3.3.4)
In order to delete the reference to footnote b, replace the headline “Parts which need not be
b
touched during normal operation :” by “Parts which need not be touched during normal
operation”.
Table 4 – Tightening torques for the verification of the mechanical strength of screw-
type terminals
Replace, in the existing title of this table,“(see 8.3.2.1, 8.2.6 and 8.2.6.2)” by “(see 8.2.4.2 and
8.3.2.1)”.
Figure 14 – Verification of short-circuit making and breaking capacities on d.c.
Replace the existing figure by the following new figure (addition of "A " in Figure 14b)):
IEC 60947-1:2007/AMD2:2014 – 13 –
© IEC 2014
a) Calibration of the circuit
Prospective peak making
current = A
b) Oscillogram corresponding to
a break after the current has
passed its maximum value
Short-circuit breaking capacity:
Current I = A at voltage U = B
Short-circuit making capacity:
Current I = A at voltage U = B
c) Oscillogram corresponding to a
break before the current has
reached its maximum value
Short-circuit breaking capacity:
Current I = A at voltage U = B
2 2
Short-circuit making capacity:
Current I = A at voltage U = B
IEC
Table 12A – Dielectric test voltage corresponding to the rated insulation voltage
b
Replace the existing footnote of this table by the following new footnote:
b
Test voltages based on 6.1.3.4.1, fifth paragraph, of IEC 60664-1:2007.
Annex A – Examples of utilization categories for low-voltage switchgear and
controlgear
Replace the existing title and text of this annex by the following:

– 14 – IEC 60947-1:2007/AMD2:2014
© IEC 2014
Annex A
(informative)
Harmonisation of utilization categories
for low-voltage switchgear and controlgear

The IEC 60947 series contains different parts specifying requirements for different types of
low-voltage switchgear. Standards for products covered by the IEC 60947 series have been
developed at different periods of time and by various working groups. It results in many
utilization categories for similar applications in the IEC 60947 series.
The objective of this annex is to give the harmonisation framework for the low-voltage
switchgear and controlgear as given in Table A.1. A future objective under consideration is to
specify a common set of requirements for testing of the products from different parts of the
IEC 60947 series.
The intended benefits are to:
– simplify the standards by bringing all similar categories together under one common set of
categories;
– help the user in the selection of equipment for specific applications.
Table A.1 – Utilization categories used in the IEC 60947 series
Nature Category Relevant
of Typical switched load IEC product
c d
current Proposed Present standard
a.c. AC-20 AC-20 No-load condition
AC-21 AC-21 Resistive loads, including moderate overloads
IEC 60947-
3:2008, Amd
AC-22 AC-22 Mixed resistive and inductive loads, including moderate
1 (2012)
overloads
AC-23 AC-23 Motor loads or other highly inductive loads
AC-1 AC-1 Non-inductive or slightly inductive loads
AC-2 AC-2 Slip-ring motors or switching of mixed resistive and inductive
loads, including moderate overloads
AC-3 AC-3 Squirrel-cage motors
a b
AC-4 AC-4 Squirrel-cage motors: plugging , inching
IEC 60947-
4-1:2009,
AC-5a AC-5a Discharge lamp ballasts
Amd 1
(2012)
AC-5b AC-5b Incandescent lamps
AC-6a AC-6a Transformers
AC-6b AC-6b Capacitor banks
AC-8 AC-8a Hermetic refrigerant compressor
AC-8 AC-8b
AC-2a AC-52a Slip ring motor stators: 8 h duty with on-load currents for
start, acceleration, run
AC-2b AC-52b Slip ring motor stators: intermittent duty
AC-3a AC-53a Squirrel-cage motors: 8 h duty with on-load currents for start,
acceleration, run IEC 60947-
4-2:2011
AC-3b AC-53b Squirrel-cage motors: intermittent duty
AC-8a AC-58a Hermetic refrigerant compressor motors with automatic
resetting of overload releases: 8 h duty with on-load currents
for start, acceleration, run
IEC 60947-1:2007/AMD2:2014 – 15 –
© IEC 2014
Nature Category Relevant
of Typical switched load IEC product
c d
current Proposed Present standard
AC-8b AC-58b Hermetic refrigerant compressor motors with automatic
resetting of overload releases: intermittent duty

AC-1 AC-51 Non-inductive or slightly inductive loads
IEC 60947-
4-3:1999
AC-5a AC-55a Discharge lamps ballast
Amd 1
AC-5b AC-55b Incandescent lamps
(2006)
AC-6a AC-56a Transformers
Amd 2
(2011)
AC-6b AC-56b Capacitor banks
AC-12 AC-12 Resistive loads and solid-state loads with isolation by
optocouplers
IEC 60947-
5-1:2003
AC-13 AC-13 Solid-state loads with transformer isolation
Amd 1
AC-14 AC-14 Small electromagnetic loads
(2009)
AC-15 AC-15 a.c. electromagnetic loads
AC-12 AC-12 Resistive loads and solid state loads with optical isolation IEC 60947-
5-2:2007
AC-140 AC-140
Small electromagnetic loads with holding (closed) current
Amd 1
≤ 0,2 A, e.g. contactor relays
(2012)
AC-1 AC-31 Non inductive or slightly inductive loads
AC-2 AC-32 Slip-ring motors or switching of mixed resistive and inductive loads,
including moderate overloads
IEC 60947-
AC-3 AC-33 Squirrel-cage motors 6-1:2005
AC-5a AC-35 Discharge lamp ballast
AC-5b AC-36 Incandescent lamps
AC-40 AC-40 Distribution circuits comprising mixed resistive and reactive
loads having a resultant inductive reactance
AC-1 AC-41 Non-inductive or slightly inductive loads
AC-2 AC-42 Slip-ring motors or switching of mixed resistive and inductive
IEC 60947-
loads, including moderate overloads
6-2:2002
Amd 1
AC-3 AC-43 Squirrel-cage motors
(2007)
a b
AC-4 AC-44 Squirrel-cage motors: plugging , inching
AC-5a AC-45a Discharge lamp ballasts
AC-5b AC-45b Incandescent lamps
AC-7a AC-7a Slightly inductive loads for household appliances and similar
IEC 61095:2
applications
AC-7b AC-7b Motor-loads for household applications
d.c. DC-20 DC-20 Connecting and disconnecting under no-load conditions
DC-21 DC-21 Resistive loads, including moderate overloads
IEC 60947-
3:2008, Amd
DC-22 DC-22 Mixed resistive and inductive loads, including moderate
1 (2012)
overloads (e.g. shunt motors)
DC-23 DC-23 Highly inductive loads (e.g. series motors)
DC-1 DC-1 Non-inductive or slightly inductive loads
IEC 60947-
Shunt-motors
DC-3 DC-3
4-1:2009,
Amd 1
Series-motors
DC-5 DC-5
(2012)
DC-6 DC-6 Incandescent lamps
DC-12 DC-12 Control of resistive loads and solid-state loads with isolation
IEC 60947-
by optocouplers
5-1:2003
Amd 1
DC-13 DC-13 Control of electromagnets

– 16 – IEC 60947-1:2007/AMD2:2014
© IEC 2014
Nature Category Relevant
of Typical switched load IEC product
c d
current Proposed Present standard
(2009)
DC-14 DC-14 Control of electromagnetic loads having economy resistors in
circuit
DC-12 DC-12 Control of resistive loads and solid state loads with optical IEC 60947-
isolation 5-2:2007
Amd 1
DC-13 DC-13 Control of electromagnets
(2012)
DC-1 DC-31 Non-inductive or slightly inductive loads
IEC 60947-
DC-3 DC-33 Shunt-motors
6-1:2005
DC-6 DC-36 Incandescent lamps
DC-40 DC-40 Distribution circuits comprising mixed resistive and reactive
loads having a resultant inductive reactance
IEC 60947-
DC-1 DC-41 Non-inductive or slightly inductive loads
6-2:2002
Shunt-motors
DC-3 DC-43 Amd 1
(2007)
Series-motors Incandescent lamps
DC-5 DC-45
DC-6 DC-46 Incandescent lamps
a
By plugging is understood stopping or reversing the motor rapidly by reversing motor primary connections
while the motor is running.
b
By inching (jogging) is understood energizing a motor once or repeatedly for short periods to obtain small
movements of the driven mechanism.
c
Utilization categories intended to be harmonized throughout product standards in their future editions.
d
Present utilization category as defined in the referred edition of the product standard in the last column until it
is changed to the proposed utilization category.

Annex K – Vacant
Replace the existing title and text of this annex by th
...