EN 60947-1:2007/A1:2011

SLOVENSKI STANDARD
01-marec-2011
Nizkonapetostne stikalne naprave - 1. del: Splošna pravila (IEC 60947-
1:2007/A1:2010)
Low-voltage switchgear and controlgear - Part 1: General rules (IEC 60947-
1:2007/A1:2010)
Niederspannungsschaltgeräte - Teil 1: Allgemeine Festlegungen (IEC 60947-
1:2007/A1:2010)
Appareillage à basse tension - Partie 1: Règles générales (CEI 60947-1:2007/A1:2010)
Ta slovenski standard je istoveten z: EN 60947-1:2007/A1:2011
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/A1
NORME EUROPÉENNE
January 2011
EUROPÄISCHE NORM
ICS 29.130.20
English version
Low-voltage switchgear and controlgear -
Part 1: General rules
(IEC 60947-1:2007/A1:2010)
Appareillage à basse tension -  Niederspannungsschaltgeräte -
Partie 1: Règles générales Teil 1: Allgemeine Festlegungen
(CEI 60947-1:2007/A1:2010) (IEC 60947-1:2007/A1:2010)

This amendment A1 modifies the European Standard EN 60947-1:2007; it was approved by CENELEC on
2011-01-01. 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 Central Secretariat 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
Central Secretariat 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, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60947-1:2007/A1:2011 E

Foreword
The text of document 17B/1710/FDIS, future amendment 1 to IEC 60947-1:2007, prepared by SC 17B,
Low-voltage switchgear and controlgear, of IEC TC 17, Switchgear and controlgear, was submitted to the
IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to EN 60947-1:2007 on
2011-01-01.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the amendment has to be
implemented at national level by publication of
an identical national standard or by endorsement (dop) 2011-10-01
– latest date by which the national standards conflicting
with the amendment have to be withdrawn (dow) 2014-01-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of amendment 1:2010 to the International Standard IEC 60947-1:2007 was approved by
CENELEC as an amendment to the European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
[5] IEC 60947-7-1 NOTE  Harmonized as EN 60947-7-1.
[6] IEC 60998-2-2:2002 NOTE  Harmonized as EN 60998-2-2:2004 (modified).
__________
- 3 - EN 60947-1:2007/A1:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Add the following normative references to the existing list:

Publication Year Title EN/HD Year

IEC 60664-3 2003 Insulation coordination for equipment within EN 60664-3 2003
low-voltage systems -
Part 3: Use of coating, potting or moulding for
protection against pollution
IEC 60664-5 2007 Insulation coordination for equipment within EN 60664-5 2007
low-voltage systems -
Part 5: Comprehensive method for
determining clearances and creepage
distances equal to or less than 2 mm

IEC 60695-2-12 - Fire hazard testing - EN 60695-2-12 -
Part 2-12: Glowing/hot-wire based test
methods - Glow-wire flammability index
(GWFI) test method for materials

IEC 60999-1 1999 Connecting devices - Electrical copper EN 60999-1 2000
conductors - Safety requirements for screw-
type and screwless-type clamping units -
Part 1: General requirements and particular
requirements for clamping units for conductors
from 0,2 mm² up to 35 mm² (included)

IEC 60999-2 2003 Connecting devices - Electrical copper EN 60999-2 2003
conductors - Safety requirements for screw-
type and screwless-type clamping units -
Part 2: Particular requirements for clamping
units for conductors above 35 mm² up to
300 mm² (included)
IEC 61557-2 - Electrical safety in low voltage distribution EN 61557-2 -
systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or
monitoring of protective measures -
Part 2: Insulation resistance
IEC 60947-1 ®
Edition 5.0 2010-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
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
W
CODE PRIX
ISBN 978-2-88912-291-2
ICS 29.130.20
– 2 – 60947-1 Amend.1 Ó IEC:2010
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
17B/1710/FDIS 17/1721/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 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.
_____________
1 General
Replace the existing note of this clause by the following new note:
NOTE The product standards forming the series of IEC standards covering low-voltage switchgear and
controlgear are:
IEC 60947-2: Part 2: Circuit-breakers
IEC 60947-3: Part 3: Switches, disconnectors, switch-disconnectors and fuse combination units
IEC 60947-4: Part 4: Contactors and motor-starters
IEC 60947-5: Part 5: Control-circuit devices and switching elements
IEC 60947-6: Part 6: Multiple function equipment
IEC 60947-7: Part 7: Ancillary equipment
IEC 60947-8: Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines.

60947-1 Amend.1 Ó IEC:2010 – 3 –
1.2 Normative references
Add the following normative references to the existing list:
IEC 60664-3:2003, Insulation coordination for equipment within low-voltage systems – Part 3:
Use of coating, potting or moulding for protection against pollution
IEC 60664-5:2007, Insulation coordination for equipment within low-voltage systems – Part 5:
Comprehensive method for determining clearances and creepage distances equal to or less
than 2 mm
IEC 60695-2-12, Fire hazard testing – Part 2-12: Glowing/hot-wire based test methods –
Glow-wire flammability test method for materials
IEC 60999-1:1999, Connecting devices – Electrical copper conductors – Safety requirements
for screw-type and screwless-type clamping units – Part 1: General requirements and
particular requirements for clamping units for conductors from 0,2 mm² up to 35 mm²
(included)
IEC 60999-2:2003, Connecting devices – Electrical copper conductors – Safety requirements
for screw-type and screwless-type clamping units – Part 2: Particular requirements for
2 2
clamping units for conductors above 35 mm up to 300 mm (included)
IEC 61557-2, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500
V d.c. – Equipment for testing, measuring or monitoring of protective measures – Part 2:
Insulation resistance
2 Definitions
Replace, in the alphabetical list, the existing references to these terms by the following new
references:
Clamping unit . 2.3.26
Multiple tip contact system . 2.3.29
Prepared conductor . 2.3.28
Screw-type terminal . 2.3.24
Screwless-type terminal . 2.3.25
Unprepared conductor . 2.3.27

This correction does not apply to the English text.
Add, in the alphabetical list, the following new terms and references:
Connecting device . 2.3.22
Electronically controlled electromagnet . 2.3.32
Electronic overload relay with current or voltage asymmetry function . T.2.2
Electronic overload relay with ground/earth fault detection function . T.2.1
Electronic overload relay with phase reversal function . T.2.3
Electronic overload relay with over voltage function . T.2.4
Electronic overload relay with under power function . T.2.6
External control device . U.1.1
Inhibit current . T.2.5
Maximum cross-section . 2.3.31
Minimum cross-section. 2.3.30
Non-universal clamping unit. 2.3.26.2
Non-universal terminal . 2.3.25.2

– 4 – 60947-1 Amend.1 Ó IEC:2010
Push-wire terminal . 2.3.25.3
Terminal . 2.3.23
Universal clamping unit . 2.3.26.1
Universal terminal. 2.3.25.1

Replace the existing terms and definitions 2.3.22 to 2.3.28 by the following new terms and
definitions:
2.3.22
connecting device
a device for the electrical connection of one (or more) conductor(s), comprising one (or more)
terminal(s), either fixed to a base or forming an integral part of the equipment
[IEC 60999-1:1999, 3.3]
2.3.23
terminal
conductive part of one pole of a device for electrical connection to external circuit, composed
of one or more clamping unit(s) and insulation if necessary
[IEC 60999-1:1999, 3.2, modified]
2.3.24
screw-type terminal
terminal intended for the connection and disconnection of conductors or for the inter-
connection of two or more conductors, the connection being made, directly or indirectly, by
means of screws or nuts of any kind
NOTE Examples are given in Annex D.
2.3.25
screwless-type terminal
terminal intended for the connection and disconnection of conductors or for the
interconnection on two or more conductors, the connection being made, directly or indirectly,
by means of springs, wedges, eccentrics or cones, etc.
NOTE Examples are given in Annex D.
2.3.25.1
universal terminal
terminal for the connection and disconnection of all types of conductors (rigid and flexible)
[IEC 60998-2-2:2002, 3.101.1]
2.3.25.2
non-universal terminal
terminal for the connection and disconnection of a certain kind of conductor only (for example,
solid conductors only or rigid [solid and stranded] conductors only)
[IEC 60998-2-2:2002, 3.101.2]
2.3.25.3
push-wire terminal
non-universal terminal in which the connection is made by pushing in rigid (solid or stranded)
conductors
[IEC 60998-2-2:2002, 3.101.3]
60947-1 Amend.1 Ó IEC:2010 – 5 –
2.3.26
clamping unit
the part(s) of the terminal necessary for the mechanical clamping and the electrical
connection of the conductor(s), including the parts which are necessary to ensure the correct
contact pressure
[IEC 60999-1:1999, 3.1]
2.3.26.1
universal clamping unit
clamping unit intended for all types of conductors
2.3.26.2
non-universal clamping unit
clamping unit intended for certain types of conductors only, for example:
– push-wire clamping unit for solid conductors only
– push-wire clamping unit for rigid (solid and stranded) conductors only
NOTE On push-wire clamping unit the connection is made by simple insertion of rigid conductors. (see 7.1.8.1)
2.3.27
unprepared conductor
conductor which has been cut and the insulation of which has been removed for insertion into
a terminal
NOTE A conductor the shape of which is arranged for introduction into a terminal or the strands of which are
twisted to consolidate the end is considered to be an unprepared conductor.
2.3.28
prepared conductor
conductor, the strands of which are soldered or the end of which is fitted with a cable lug,
eyelet, etc.
Add, after definition 2.3.28, the following new terms and definitions 2.3.29 to 2.3.32 :
2.3.29
multiple tip contact system
contact system comprising more than one contact gap per pole, which can be switched, in
series and/or in parallel
2.3.30
minimum cross-section
value of the smallest connectable conductor cross-section stated by the manufacturer as
suitable for the terminal
NOTE The manufacturer may declare several minimum cross-sections depending on the type of conductor, for
example rigid, stranded, flexible, with or without ferrule.
2.3.31
maximum cross-section
value of the largest connectable conductor cross-section stated by the manufacturer as
suitable for the terminal
NOTE 1 The manufacturer may declare several maximum cross-sections depending on the type of conductor, for
example rigid, stranded, flexible, with or without ferrule.
NOTE 2 The term “rated cross-section” used in IEC 60947-7-1 and IEC 60999-2 and the term “rated connecting
capacity” of a clamping unit used in IEC 60999-1 are considered equivalent when referring to certain thermal,

– 6 – 60947-1 Amend.1 Ó IEC:2010
mechanical and electrical requirements, as stated by the manufacturer and as specified in their relevant product
standard.
2.3.32
electronically controlled electromagnet
electromagnet in which the coil is controlled by a circuit with active electronic elements
4 Characteristics
In the existing line "Rated ultimate short-circuit breaking capacity" of the list, replace "4.3.2.4"
a
by " ".
a
In the existing line "Rated uninterrupted current" of the list, replace " " by "4.3.2.4".
4.5.1 Electrical control circuits
Replace the existing title and text of this subclause by the following:
4.5.1 Electrically or electronically controlled circuits
Characteristics of electrical and electronic control circuits:
– type of current;
– rated frequency or d.c.;
– rated control circuit voltage U (a.c., d.c.);
c
– rated control supply voltage U (a.c., d.c.), where applicable;
s
– nature of external control circuit devices (contacts, sensors, optocouplers, electronic
active components, etc);
– power consumption.
NOTE 1 In case of an electrical control circuit a distinction has been made above between the control circuit
voltage U , which is the voltage which would appear across the "a" contacts (see 2.3.12) in the control circuit, and
c
the control supply voltage U , which is the voltage applied to the input terminals of the control circuit of the
s
equipment and may be different from the control circuit voltage, due to the presence of built-in transformers,
rectified, resistors, etc.
NOTE 2 In case of an electronically control circuit a distinction is made between the control circuit voltage U ,
c
which is the controlling input signal, and the control supply voltage U , which is the voltage applied to energize the
s
power supply terminals of the control circuit equipment and may be different from U due to the presence of built-in
c
transformers, rectifiers, resistors, electronic circuitry, etc.
The rated control circuit voltage and rated frequency, if any, are the values on which the
operating and temperature-rise characteristics of the control circuit are based. The correct
operating conditions are based upon a value of the control supply voltage not less than 85 %
of its rated value, with the highest value of control circuit current flowing, nor more than
110 % of its rated value.
The electronic part of an electronically controlled electromagnet may form an integral part or a
separate part provided it is an intrinsic function of the device. In both cases, the device shall
be tested with this electronic part mounted as in normal use.
Annex U gives examples and illustrations of different circuit configurations.
The ratings and characteristics of control circuit devices shall comply with the requirements of
IEC 60947-5 (see the note of Clause 1).
4.7 Relays and releases
Add, at the end of the existing list, the following new dashed item:

60947-1 Amend.1 Ó IEC:2010 – 7 –
- extended functions as given in Annex T.
4.8 Co-ordination with short-circuit protective devices (SCPD)
Replace the existing note by the following new note:
NOTE IEC/TR 61912-1 gives guidance on co-ordination with SCPDs.
5.1 Nature of information
In the list of characteristics, add after “- rated impulse withstand voltage (see 4.3.1.3)”, the
following new dashed item:
– relay or release characteristics (see 4.7);
Add the following new text before the existing note of this subclause:
– length of insulation to be removed before insertion of the conductor into the terminal;
– maximum number of conductors which may be clamped.
For non-universal screwless terminals:
– “s” or "sol" for terminals declared for rigid-solid conductors;
– "r" for terminals declared for rigid (solid and stranded) conductors;
– "f" for terminals declared for flexible conductors .
In the case of electronically controlled electromagnets, other information may also be
necessary, for example control circuit configuration (see 4.5 and Annex U).
5.2 Marking
Add, at the end of this subclause, the following new paragraphs:
In the case of electronically controlled electromagnets, information other than that given in 5.1
may also be necessary (see also 4.5 and Annex U).
The indication "s", "sol", "r" or "f" for non-universal screwless terminals shall be marked on the
device or, if the space available is not sufficient, on the smallest package unit or in technical
information provided with the product.
In the case of a group of terminals located together, a single marking on the device is
acceptable.
7.1.2.1 General materials requirements
Replace the first paragraph of this subclause by the following new paragraph:
Parts of insulating materials which might be exposed to thermal stresses due to electrical
effects within the equipment shall not be adversely affected by abnormal heat and by fire.
Delete the existing last paragraph of this subclause.
7.1.2.2 Glow wire testing
Replace the existing first three paragraphs of this subclause by the following new text:
The suitability of materials used is verified by:
a) making tests on the equipment; or

– 8 – 60947-1 Amend.1 Ó IEC:2010
b) making tests on sections taken from the equipment; or
c) making tests on any parts of identical material having representative thickness; or
d) providing data from the insulating material supplier fulfilling the requirements according to
IEC 60695-2-12.
The suitability shall be determined with respect to resistance to abnormal heat and fire.
The manufacturer shall indicate which methods, amongst a), b), c) and d) shall be used.
7.1.2.3 Test based on flammability category
Add, after the existing text, the following new paragraph:
Alternatively, the manufacturer may provide data from the insulating material supplier fulfilling
the requirements given in Annex M.
7.1.7.1 Additional constructional requirements
Replace the existing third dashed item of the list by the following new dashed item:
– visibility of all moving main contacts.
7.1.8.1 Constructional requirements
Replace the second paragraph of this subclause by the following new paragraph:
Terminal connections shall be such that the force to connect the conductors may be applied
by screws, screwless-type or other equivalent means so as to ensure that the necessary
contact pressure is maintained.
Add, after the existing Note 1 of this subclause, the following new text:
Screwless-type clamping units, unless otherwise specified by the manufacturer, shall accept
rigid and flexible conductors as indicated in Table 1.
On screwless-type clamping unit, the connection or disconnection of conductors shall be
made as follows:
– on universal clamping units by the use of a general purpose tool or a convenient device,
integral with the clamping unit to open it for the insertion or withdrawal of the conductors;
– on push-wire clamping units by simple insertion. For the disconnection of the conductors
an operation other than a pull only on the conductor shall be necessary. The use of a
general purpose tool or of a convenient device, integral with the clamping unit is allowed
in order to "open" it and to assist the insertion or the withdrawal of the conductor.
7.1.10.2 Protective earth terminal
In the last paragraph of this subclause, replace the reference to 2.1.1.5 by a reference to
2.1.15.
7.2.1.2 Limits of operation of power operated equipment
Add, after the existing fourth paragraph of this subclause, the following new text:
The limits between which an equipment, with an electronically controlled electromagnet, shall
drop out and open fully are
- for d.c.: 75 % to 10 % of their rated control supply voltage U ,
s
60947-1 Amend.1 Ó IEC:2010 – 9 –
- for a.c.: 75 % to 20 % of their rated control supply voltage U , or 75 % to 10 % of their
s
rated control supply voltage U if specified by the manufacturer.
s
Add, after the last existing paragraph of this subclause, the following new paragraph:
The drop out time may need to be specified for particular applications. In this case the drop
out time shall be measured during the test associated with the verification of this subclause.
7.2.3 Dielectric properties
Add, at the end of the first paragraph, the following new second sentence:
For reduced clearances and creepage distances through the use of coating see IEC 60664-3;
for clearances and creepage distances equal to or less than 2 mm see IEC 60664-5.
7.3.1 General
Add, after the existing Note 2 of this subclause, the following new paragraph:
For the purpose of this standard, the phrase “electronic circuit” excludes circuits in which all
components are passive (including diodes, resistors, varistors, capacitors, surge suppressors,
inductors).
7.3.2.2 Equipment incorporating electronic circuits
Delete the existing second paragraph of this subclause.
8.2.4 Mechanical properties of terminals
Replace the existing title of this subclause by the following new title:
8.2.4 Mechanical and electrical properties of terminals

8.2.4.2 Tests of mechanical strength of terminals
Replace, in the existing first paragraph of this subclause, "cross-sectional area" by " cross-
section".
Add, after the existing first paragraph of this subclause, the following new paragraph:
Screwless-type clamping unit according to 7.1.8.1 are tested with conductors of the maximum
cross-section.
8.2.4.3 Testing for damage to and accidental loosening of conductors (flexion test)
Replace, in the existing item a) of this subclause, "smallest cross-section" by "minimum cross-
section".
Replace, in the existing item b) of this subclause, "largest cross-section" by "maximum cross-
section".
Replace, in the existing item c) of this subclause, "smallest and largest cross-sections" by
"minimum and maximum cross-sections".

– 10 – 60947-1 Amend.1 Ó IEC:2010
8.2.4.4.1 Round copper conductors
Replace the existing third paragraph of this subclause by the following paragraph:
The force shall be applied without jerks for 1 min, in the direction of the axis of the conductor.
8.2.4.5 Test for insertability of unprepared round copper conductors having the
maximum specified cross-section
In the existing title of this subclause, replace "maximum specified cross-section" by "maximum
cross-section".
Add, after the existing subclause 8.2.4.6, the two following new subclauses 8.2.4.7 and
8.2.4.8:
8.2.4.7 Electrical performance of screwless-type clamping units
Subclauses 9.8 of IEC 60999-1 and 9.8 of IEC 60999-2 apply.
NOTE 1 The terms “smallest cross-sectional area” and “largest cross-sectional area” of IEC 60999 series are
respectively "minimum cross section" (2.3.30) and "maximum cross section" (2.3.31) defined in this standard.
NOTE 2 The test current generally applied is I or I declared for the product.
th the
The detailed test requirements may be adapted in the product standards.
NOTE 3 The product standard should consider the practicality of the detailed test requirements.
8.2.4.8 Ageing test for screwless-type clamping units
Subclauses 9.10 of IEC 60999-1 and 9.10 of IEC 60999-2 apply.
NOTE 1 The terms “smallest cross-sectional area” and “largest cross-sectional area” of IEC 60999 series are
respectively "minimum cross section" (2.3.30) and "maximum cross section" (2.3.31) defined in this standard.
NOTE 2 The test current generally applied is I or I declared for the product.
th the
The detailed test requirements may be adapted in the product standards.
NOTE 3 The product standard should consider the practicality of the detailed test requirements.
8.2.5.2.1 Dependent and independent manual operation
Add, after the existing third paragraph of this subclause, the following new paragraph:
Where the device has more than one contact system in series, all contact systems that are in
series shall be held in the closed position.
Add, at the end of this subclause, the following new paragraph:
Verification shall be made according to 8.2.5.3.1.
8.2.5.2.2 Dependent power operation
Add, after the first paragraph of this subclause, the following new paragraph:
Where the device has more than one contact system in series, all contact systems that are in
series shall be held in the closed position.

60947-1 Amend.1 Ó IEC:2010 – 11 –
8.2.5.2.3 Independent power operation
Add, after the first paragraph of this subclause, the following new paragraph:
Where the device has more than one contact system in series, all contact systems that are in
series shall be held in the closed position.
8.3.3.2.1 Power operated equipment
Add, at the end of this subclause, the following new text:
In the case of a power operated equipment with electronically controlled electromagnet,
supplied with a.c., where a drop out range is declared with limits between 75 % to 10 % of
their rated control supply voltage U , the equipment shall, in addition, be submitted to the
s
capacitive drop out test as follows:
A capacitor C shall be inserted in series in the supply circuit U , the total length of the
s
connecting conductors being £3 m. The capacitor is short-circuited by a switch of negligible
impedance. The supply voltage shall then be adjusted to 110 % U .
s
It shall be verified that the equipment drops out when the switch is operated to the open
position.
The value of the capacitor shall be
C (nF) = 30 + 200 000 / (f ´ U )
s
where
f is the minimum rated frequency (Hz);
U is the maximum rated supply voltage (V).
s
For example for a coil rated 12…24 V – 50 Hz, the capacitor value is 196 nF (calculation
made with U max).
s
The test voltage is the highest value of the declared rated supply voltage range U .
s
NOTE The value of the capacitor simulates a typical control wiring of 100 m long cable of 1,5 mm2
(0,3 nF/m that is 30 nF for 100 m) connected to a static output having a 1,3 mA leakage current
(200 000 in the formula ≈ 10 E+9 *1,3 E-3/2*p).
8.3.3.3.2 Measurement of the temperature of parts
Replace the fifth paragraph of this subclause by the two following new paragraphs:
For electromagnet coils, the method of measuring the temperature by variation of resistance
shall generally be used. Other methods are permitted only if it is impracticable to use the
resistance method, for example for electronically controlled electromagnet. When measured
by another method than the resistance method the limits of temperature rise permitted shall
be adjusted accordingly. The product standard shall state the method and the limits.
In the case of an electronically controlled electromagnet, coil temperature measuring by
variation of resistance may be impracticable; in such a case, other methods are permitted,
e.g. thermocouples or other suitable methods. When measured by another method than the
resistance method the limits of temperature rise permitted shall be adjusted accordingly. The
product standard shall state the method and the limits.

– 12 – 60947-1 Amend.1 Ó IEC:2010
8.3.3.4.1 Type tests
Add, at the end of item 1), the following new text:
For the dielectric test between phases, all circuits between these phases may be
disconnected for the test.
NOTE 3 The purpose of this test is to check the functional insulation only.
When the circuits of equipment include devices such as motors, instruments, snap
switches, capacitors and solid state devices which, according to their relevant
specifications, have been subjected to dielectric test voltages lower than those specified in
this standard, such devices shall be disconnected for the test.
Where the control circuit normally connected to the main circuit is disconnected, the
method used to maintain the main contacts closed shall be indicated in the test report.
For the dielectric test between phase and earth, all circuits shall be connected.
NOTE 4 The connection of all circuits for this test takes into account the function of protection against electric
shock of the insulation between phase and earth.
Printed circuit boards and modules with multi-point connectors may be disconnected or
replaced by dummies during the insulation test. This does not apply, however, to
auxiliaries for which, in case of an insulation fault, voltage may pass onto accessible parts
not connected to the housing or from the side of higher voltage to the side of lower
voltage, e.g. auxiliary transformers, measuring equipment, pulse transformers, the
insulation stress of which is equal to that for the main circuit.
Replace the last paragraph of item 2) a) by the following new paragraph:
Clearances equal to or larger than the values of case A of Table 13 may be verified by
measurement, according to the method described in Annex G.
Replace the last paragraph of item 3) a), by the following new paragraph:
The values of Table 12A are deemed to cover the ability to withstand temporary overvoltages
(see the footnote b of Table 12A).
Add, after the first paragraph of item 3) b), the following new note:
NOTE "practically sinusoidal" means that the ratio between the peak value and the r.m.s. value is Ö2 ±3 %.
Delete the last existing sentence of item 3) b).
Replace the existing text of item 3) c), by the following new text and note:
The test voltage shall be applied to for 5 s in accordance with items i), ii) and iii) of
2) c) above.
NOTE The product standard may increase the test duration to 60 s.
8.3.4.1.2 Test circuit
Replace the existing first paragraph of item c) by the following new paragraph:
In each test circuit (Figures 9, 10, 11 and 12), the resistors and reactors are inserted between
the supply source S and the equipment D under test. The positions of the closing device A
and the current sensing devices (I , I , I ) may be different. The closing device A may be
1 2 3
located on low voltage side or alternatively on the primary side. In the latter case the testing
station has to demonstrate that the voltage wave is not distorted by the residual flux of the
short-circuit transformer. The connections of the equipment under test to the test circuit shall
be stated in the relevant product standard.

60947-1 Amend.1 Ó IEC:2010 – 13 –
Table 15 – Minimum creepage distances
Replace the existing Table 15 by the following new Table 15:
Table 15 – Minimum creepage distances
Minimum creepage distances for equipment subject to long term stress
Printed wiring
Rated
material
insulation
voltage of
Pollution degree
equipment
or working
1 2 1 2 3 4
voltage
Material groups
a.c. r.m.s.
b, c
or d.c.
All
All except All I II III I II IIIa IIIb I II IIIa IIIb
IIIb
V mm mm mm mm mm mm mm mm mm mm mm mm mm mm
10 0,025 0,04 0,08 0,4 0,4 0,4 1 1 1 1,6 1,6 1,6
12,5 0,025 0,04 0,09 0,42 0,42 0,42 1,05 1,05 1,05 1,6 1,6 1,6
16 0,025 0,04 0,1 0,45 0,45 0,45 1,1 1,1 1,1 1,6 1,6 1,6
20 0,025 0,04 0,11 0,48 0,48 0,48 1,2 1,2 1,2 1,6 1,6 1,6
25 0,025 0,04 0,125 0,5 0,5 0,5 1,25 1,25 1,25 1,7 1,7 1,7
32 0,025 0,04 0,14 0,53 0,53 0,53 1,3 1,3 1,3 1,8 1,8 1,8
40 0,025 0,04 0,16 0,56 0,8 1,1 1,4 1,6 1,8 1,9 2,4 3
50 0,025 0,04 0,18 0,6 0,85 1,2 1,5 1,7 1,9 2 2,5 3,2
63 0,04 0,063 0,2 0,63 0,9 1,25 1,6 1,8 2 2,1 2,6 3,4
80 0,063 0,1 0,22 0,67 0,95 1,3 1,7 1,9 2,1 2,2 2,8 3,6
100 0,1 0,16 0,25 0,71 1 1,4 1,8 2 2,2 2,4 3 3,8
125 0,16 0,25 0,28 0,75 1,05 1,5 1,9 2,1 2,4 2,5 3,2 4
160 0,25 0,4 0,32 0,8 1,1 1,6 2 2,2 2,5 3,2 4 5
200 0,4 0,63 0,42 1 1,4 2 2,5 2,8 3,2 4 5 6,3
250 0,56 1 0,56 1,25 1,8 2,5 3,2 3,6 4 5 6,3 8
320 0,75 1,6 0,75 1,6 2,2 3,2 4 4,5 5 6,3 8 10
400 1 2 1 2 2,8 4 5 5,6 6,3 8 10 12,5
500 1,3 2,5 1,3 2,5 3,6 5 6,3 7,1 8 10 12,5 16
a
630 1,8 3,2 1,8 3,2 4,5 6,3 8 9 10 12,5 16 20
800 2,4 4 2,4 4 5,6 8 10 11 12,5 16 20 25
1 000 3,2 5 3,2 5 7,1 10 12,5 14 16 20 25 32
1 250  4,2 6,3 9 12,5 16 18 20 25 32 40
1 600  5,6 8 11 16 20 22 25 32 40 50
2 000  7,5 10 14 20 25 28 32 40 50 63
2 500  10 12,5 18 25 32 36 40 50 63 80
a
3 200  12,5 16 22 32 40 45 50 63 80 100
4 000  16 20 28 40 50 56 63 80 100 125
5 000  20 25 36 50 63 71 80 100 125 160
6 300  25 32 45 63 80 90 100 125 160 200
8 000  32 40 56 80 100 110 125 160 200 250
10 000  40 50 71 100 125 140 160 200 250 320
a
Values of creepage distances in this area have not been established. Material group IIIb is in general not
recommended for application in pollution degree 3 above 630 V and in pollution degree 4.
b
As an exception, for rated insulation voltages 127 V, 208 V, 415/440 V, 660/690 V and 830 V, creepage distances
corresponding to the lower values 125 V, 200 V, 400 V, 630 V and 800 V respectively may be used.
c
The values of creepage distances stated for 250 V can be used for 230 V (±10 %) nominal voltage.
NOTE 1 It is appreciated that tracking or erosion will not occur on insulation subjected to working voltages of 32 V and
below. However, the possibility of electrolytic corrosion has to be considered and for this reason minimum creepage
distances have been specified.
NOTE 2 Voltage values are selected in accordance with the R series.
– 14 – 60947-1 Amend.1 Ó IEC:2010
Table 23 – Tests for EMC – Immunity
Replace the existing Table 23 by the following new Table 23:
Table 23 – Tests for EMC – Immunity
(see 8.4.1.2)
Type of test Test level required
Electrostatic discharge immunity test 8 kV / air discharge
IEC 61000-4-2 or
4 kV / contact discharge
Radiated radio-frequency electromagnetic field immunity test 10 V/m
80 MHz to 1 GHz
IEC 61000-4-3
Radiated radio-frequency electromagnetic field immunity test 3 V/m
1,4 GHz to 2 GHz
IEC 61000-4-3
Radiated radio-frequency electromagnetic field immunity test 1 V/m
2 GHz to 2,7 GHz
IEC 61000-4-3
Electrical fast transient/burst immunity test 2 kV/ 5 kHz on power ports
IEC 61000-4-4 1 kV/ 5 kHz on signal ports
a
2 kV (line to earth)
1,2/50 ms – 8/20 ms surge immunity test
IEC 61000-4-5 1 kV (line to line)
Conducted radio-frequency immunity test 10 V
(150 kHz to 80 MHz)
IEC 61000-4-6
b
Power frequency magnetic field immunity test 30 A/m
IEC 61000-4-8
c, d, e c, d, e
Voltage dips immunity test (50 Hz/ 60 Hz) Class 2 Class 3
e
IEC 61000-4-11
0 % during 0,5 cycle 0 % during 0,5 cycle
and 1 cycle and 1 cycle
70 % during 40 % during
25 / 30 cycles 10/12 cycles
70 % during
25/30 cycles
80 % during
250/300 cycles
c, d, e c, d, e
Short interruptions immunity test Class 2 Class 3
IEC 61000-4-11
0 % during 250/300 0 % during 250/300
cycles cycles
f
Immunity to harmonics in the supply No requirements
IEC 61000-4-13
NOTE Performance criteria are given in the relevant product standard based on the acceptance criteria given in
Table 24.
a
Regarding applicability see 7.2 and 8.2 of IEC 61000-4-5 (Not applicable for low voltage d.c. input/output ports
(£ 60 V), when the secondary circuits (isolated from the a.c. mains) are not subject to transient overvoltages).
b
Applicable only to equipment containing devices susceptible to power frequency magnetic fields (see 8.4.1.2.7).
c
The given percentage means percentage of the rated operating voltage, e.g. 0 % means 0 V.
d
Class 2 applies to points of common coupling and in-plant points of common coupling in the industrial
environment in general.
Class 3 applies to in-plant couplings in industrial environment only. This class should be considered when a
major part of the load is fed through converters; welding machines are present; large motors are frequently
started or loads vary rapidly.
The product standard shall state the applicable class.

e
The value in front of the slash mark (/) is for 50 Hz and the value behind for 60 Hz tests.
f
Requirements are under study for the future.

60947-1 Amend.1 Ó IEC:2010 – 15 –
Figure 9 – Diagram of the test circuit for the verification of short-circuit making and
breaking capacities of a single-pole equipment on single-phase a.c. or on d.c.
Replace the existing note of this figure by the following new note:
NOTE Adjustable loads X and R may be located either on the high-voltage side or on the low-voltage side of the
supply circuit.
Figure 10 – Diagram of the test circuit for the verification of short-circuit making and
breaking capacities of a two-pole equipment on single-phase a.c. or on d.c.
Replace the existing Note 1 of this figure by the following new Note 1:
NOTE 1 Adjustable loads X and R may be located either on the high-voltage side or on the low-voltage side of
the supply circuit.
Figure 11 – Diagram of the test circuit for the verification of short-circuit making and
breaking capacities of a three-pole equipment
Replace the existing Note 1 of this figure by the following new Note 1:
NOTE 1 Adjustable loads X and R may be located either on the high-voltage side or on the low-voltage side of
the supply circuit.
Figure 12 – Diagram of the test circuit for the verification of short-circuit making and
breaking capacities of a four-pole equipment
Replace the existing Note 1 of this figure by the following new Note 1:
NOTE 1 Adjustable loads X and R may be located either on the high-voltage side or on the low-voltage side of
the supply circuit.
– 16 – 60947-1 Amend.1 Ó IEC:2010
Annex C (normative) – Degrees of protection of enclosed equipment
C.13.5.2 Acceptance conditions for first characteristic numeral 5
Replace the last existing paragraph of this subclause by the new following text:
After this period the equipment is to be removed from the test chamber within 15 min and
submitted to a power-frequency dielectric test for 1 min, the value being 2 U max. with a
e
minimum of 1 000 V. Application of the test voltage and the acceptance criteria shall be as
specified in 8.3.3.4.1 item 3) c) and item 3) d).
C.14 Tests for protection against water indicated by second characteristic
numeral
Replace the existing subclauses and text of this clause by the following new subclauses and
text:
C.14.1 Test means
Subclause 14.1 of IEC 60529 applies.
C.14.2 Test conditions
Subclause 14.2 of IEC 60529 applies.
C.14.3 Acceptance conditions
Subclause 14.3 of IEC 60529 applies with the following addition:
The equipment is then submitted to a power-frequency dielectric test for 1 min, the value
being 2 U max. with a minimum of 1 000 V. Application of the test voltage and the
e
acceptance criteria shall be as specified in 8.3.3.4.1 item 3) c) and item 3) d).

60947-1 Amend.1 Ó IEC:2010 – 17 –
Annex D (informative) – Examples of terminals
Replace the existing title and text of this annex by the following new title and text:
Annex D
(informative)
...