IEC 60947-2:2006/AMD1:2009
(Amendment)Amendment 1 - Low-voltage switchgear and controlgear - Part 2: Circuit-breakers
Amendment 1 - Low-voltage switchgear and controlgear - Part 2: Circuit-breakers
Amendement 1 - Appareillage à basse tension - Partie 2: Disjoncteurs
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IEC 60947-2 ®
Edition 4.0 2009-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low-voltage switchgear and controlgear –
Part 2: Circuit-breakers
Appareillage à basse tension –
Partie 2: Disjoncteurs
IEC 60947-2:2006/A1:2009
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IEC 60947-2 ®
Edition 4.0 2009-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low-voltage switchgear and controlgear –
Part 2: Circuit-breakers
Appareillage à basse tension –
Partie 2: Disjoncteurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
U
CODE PRIX
ICS 29.130.20 ISBN 978-2-88910-336-2
– 2 – 60947-2 Amend. 1 © IEC:2009
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/1636/FDIS 17B/1651/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 maintenance result 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• withdrawn;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.
_______________
Replace in the whole document "Utilization category" by "Selectivity category" except in
Annex L.
CONTENTS
Add the following:
8.5 Special tests – Damp heat, salt mist, vibration and shock
Insert the following:
Figure K.2 – Template for characteristics of cut-off current versus prospective current from
1 kA to 200 kA
Figure K.3 – Template for characteristics of cut-off current versus prospective current from
0,01 kA to 200 kA
Figure K.4 – Template for characteristics of let-through energy versus prospective current
from 1 kA to 200 kA
Figure K.5 – Template for characteristics of let-through energy versus prospective current
from 0,01 kA to 200 kA
60947-2 Amend. 1 © IEC:2009 – 3 –
Figure K.6 – Example of the use of template K.2
Figure K.7 – Example of the use of template K.4
Insert the following:
Table 9b – Applicability of tests or test sequences to four-pole circuit-breakers in a
given frame size and design when tested according to the alternative programme 1 of 8.3.1.4
Table 9c – Applicability of tests or test sequences to 3-pole circuit-breakers in a
given frame size and design when tested according to the alternative programme 2 of 8.3.1.4
1.2 Normative references
Delete the reference to IEC 60364-4-41:2001.
Add the following reference:
IEC 60417, Graphical symbols for use on equipment
IEC 60617, Graphical symbols for diagrams
Replace “IEC 60755:1983” by “IEC/TR 60755:1983”.
Replace the reference to IEC 60947-1:2004 by the following:
IEC 60947-1:2007, Low-voltage switchgear and controlgear – Part 1: General rules
Add, after IEC 60947-4-1:2000, the following reference:
Amendment 2 (2005)
Replace the reference to IEC 61000-3-2:2000 by the following:
IEC 61000-3-2:2005, Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for
harmonic current emissions (equipment input current ≤ 16 A per phase)
Add, after IEC 61000-3-3:1994, the following reference:
Amendment 2 (2005)
Replace the reference to IEC 61000-4-3:2002 by the following:
– 4 – 60947-2 Amend. 1 © IEC:2009
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and
measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test
Replace the reference to IEC 61000-4-4:1995 by the following:
IEC 61000-4-4:2004, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
measurement techniques – Electrical fast transient/burst immunity test
Replace the reference to IEC 61000-4-5:1995 by the following:
IEC 61000-4-5:2005, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
Add, after IEC 61000-4-6:2003, the following reference:
Amendment 2 (2006)
Replace “IEC 61000-5-2:1997” by “IEC/TR 61000-5-2:1997”.
Add, after IEC 61008-1:1996, the following reference:
Amendment 2 (2006)
Add, after IEC 61009-1:1996, the following reference:
Amendment 2 (2006)
Add, after IEC 61009-1:1996, the following reference:
IEC 61131-1:2003, Programmable controllers – Part 1: General information
Add, after CISPR 11:2003, the following reference:
Amendment 2 (2006)
Add, after CISPR 22:2005, the following reference:
Amendment 2 (2006)
2.3
current-limiting circuit-breaker
Replace the existing definition by the following:
circuit-breaker that, within a specified range of current, prevents the let-through current
reaching the prospective peak value and which limits the let-through energy (I t) to a value
less than the let-through energy of a half-cycle wave of the symmetrical prospective current
NOTE 1 Reference may be made to either the symmetrical or asymmetrical prospective peak value of let-through
current.
NOTE 2 The let-through current is also referred to as the cut-off current (see IEV 441-17-12).
60947-2 Amend. 1 © IEC:2009 – 5 –
NOTE 3 Templates for the graphical representation of the cut-off current characteristic and the let-through energy
characteristic are given in Figures K.2 to K.5 and examples of the use of the templates in Figures K.6 and K.7.
Add, after definition 2.20, the following new definition 2.21:
2.21
programmable logic controller
PLC
digitally operating electronic system, designed for use in an industrial environment, which
uses a programmable memory for the internal storage of user-oriented instructions for
implementing specific functions such as logic, sequencing, timing, counting and arithmetic, to
control, through digital or analogue inputs and outputs, various types of machines or
processes. Both the PLC and its associated peripherals are designed so that they can be
easily integrated into an industrial control system and easily used in all their intended
functions
[IEC 61131-1, definition 3.5]
3.8
Replace the reference to 7.1.11 of IEC 60947-1 by the reference to 7.1.12 of IEC 60947-1.
4.3.2.4 Current rating for four-pole circuit-breakers
Replace the reference to 7.1.8 of IEC 60947-1 by the reference to 7.1.9 of IEC 60947-1.
5.2 Marking
Replace, under item a), last bullet, the reference to 7.1.5.1 of IEC 60947-1 by the reference to
7.1.6.1 of IEC 60947-1.
Correct, under item b),7th bullet, the symbol with the symbol
Replace, under item b), 13th bullet, the reference to 7.1.9.3 of IEC 60947-1 by the reference
to 7.1.10.3 of IEC 60947-1.
Replace, under item e), the reference to 7.1.7.4 of IEC 60947-1 by the reference to 7.1.8.4 of
IEC 60947-1.
– 6 – 60947-2 Amend. 1 © IEC:2009
7.1 Constructional requirements
Replace the five first paragraphs of the subclause by the following:
Subclause 7.1 of IEC 60947-1 applies. Where, in Subclause 7.1.2.2 of IEC 60947-1, the test
temperature is to be specified, the test temperature required by this standard is 960°C.
7.1.2 Additional requirements for circuit-breakers suitable for isolation
Replace, in the second paragraph, the reference to 7.1.6 of IEC 60947-1 by the reference to
7.1.7 of IEC 60947-1.
7.1.5 List of construction breaks
Add a new item f).
th
f) in the case of the 4-pole variant, replacement of the trip unit in the 4 pole by a link, to
provide an unprotected neutral.
7.1.6 Additional requirements for circuit-breakers provided with a neutral pole
Replace, in the first paragraph, the reference to 7.1.8 of IEC 60947-1 by the reference to
7.1.9 of IEC 60947-1.
Add, after Subclause 7.1.6, the following new Subclause 7.1.7:
7.1.7 Digital inputs and outputs for use with programmable logic controllers (PLCs)
Annex S of IEC 60947-1 applies. For the purposes of this standard this requirement does not
apply to digital inputs and outputs dedicated to devices other than PLCs.
8.1.1
Add, after the second dashed item, the following new third dashed item:
− special tests (see 8.5).
60947-2 Amend. 1 © IEC:2009 – 7 –
8.3.1 Test sequences
Replace the first four paragraphs of this subclause by the following:
8.3.1.1 General
Type tests are grouped together in a number of sequences, as shown in Table 9.
For each sequence, tests shall be made in the order listed unless otherwise specified in this
standard.
8.3.1.2 Tests omitted from sequence I and made separately
With reference to 8.1.1 of IEC 60947-1, the following tests of test sequence I (see 8.3.3) may
be omitted from the sequence and made on separate samples:
– tripping limits and characteristics (8.3.3.1); in which case the sample(s) tested in the
sequence shall be subjected to the tests of 8.3.3.1.3, at the maximum setting only and
without the additional test of item b) to verify the time-current characteristic;
– test of dielectric properties (8.3.3.2);
– test of under-voltage releases of 8.3.3.3.2 (item c) and 8.3.3.3.3, to verify the
requirements of 7.2.1.3 of IEC 60947-1, and tests of under-voltage releases at alternative
frequencies (see 8.3.2.1);
– test of shunt releases of 8.3.3.3.2 (item d) and 8.3.3.3.3, to verify the requirements of
7.2.1.4 of IEC 60947-1, and tests of shunt releases at alternative frequencies (see
8.3.2.1);
– additional tests for operational capability without current for withdrawable circuit-breakers
(8.3.3.3.5).
8.3.1.3 Applicability of sequences according to the relationship between short-circuit
ratings
The applicability of test sequences according to the relationship between I , I and I is
cs cu cw
given in Table 9a.
a
Table 9 – Overall schema of test sequences
Replace, in the fifth row (s
...
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