IEC 60947-6-1:2005/AMD1:2013

IEC 60947-6-1 ®
Edition 2.0 2013-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low-voltage switchgear and controlgear –
Part 6-1: Multiple function equipment – Transfer switching equipment

Appareillage à basse tension –
Partie 6-1: Matériels à fonctions multiples – Matériels de connexion de transfert
IEC 60947-6-1:2005/A1:2013
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IEC 60947-6-1 ®
Edition 2.0 2013-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low-voltage switchgear and controlgear –

Part 6-1: Multiple function equipment – Transfer switching equipment

Appareillage à basse tension –

Partie 6-1: Matériels à fonctions multiples – Matériels de connexion de transfert

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX Q
ICS 29.120.40, 29.130.20 ISBN 978-2-8322-1304-9

– 2 – 60947-6-1 Amend.1 © IEC:2013
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/1830FDIS 17B/1840/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• withdrawn,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.
_____________
60947-6-1 Amend.1 © IEC:2013 – 3 –
INTRODUCTION to the Amendment
This amendment includes the following significant technical changes with respect to the
second edition of IEC 60947-6-1 published in 2005:
• clarification of the scope and object;
• update of the normative references;
• clarification of the classification in Clause 4;
• new EMC test: voltage harmonics
• minimum test for derived TSE;
• alignments to the Amendment 1 (2010) of IEC 60947-1:2007:
– electrically or electronically controlled circuits;
– markings ("s", "sol", "r" or "f");
– constructional requirements including material requirements;
– requirement for screwless terminals;
– references to EMC test.
• alignments to the Amendment 1 (2012) of IEC 60947-4-1:2009:
– test at the rated conditional short-circuit current I of protected switching devices;
q
– short-circuit tests harmonisation.
• creation of bibliography.
_____________
1 Scope and object
Replace the existing first paragraph of this clause by the following new paragraph:
This part of IEC 60947 applies to transfer switching equipment (TSE) to be used in power
systems for transferring a load supply between a normal and an alternate source with a
supply interruption during transfer, the rated voltage of which does not exceed 1 000 V a.c. or
1 500 V d.c.
Replace in the second dash of the second paragraph "remote" by "remotely".
Renumber the existing note as "NOTE 1".
Delete, in the existing list, the existing items a) and b) under 1).
Add, at the end of the existing text, the following new notes:
NOTE 2 This standard covers also ATSE or RTSE which can be used for safety services as defined in
IEC 60364-1 and for which the installation requirements are given by IEC 60364-5-56.
NOTE 3 Other ATSE requirements are under consideration such as closed transition TSE (make before break
transfer operation).
2 Normative references
Replace the existing references to the IEC 60947-1, IEC 60947-2, IEC 60947-3, IEC 60947-4-
1 and to the IEC 60947-6-2 by the following new references:

– 4 – 60947-6-1 Amend.1 © IEC:2013
IEC 60947-1:2007, Low-voltage switchgear and controlgear – Part 1: General rules
Amendment 1:2010
IEC 60947-2:2006, Low-voltage switchgear and controlgear – Part 2: Circuit-breakers
Amendment 1:2009
Amendment 2:2013
IEC 60947-3:2008, Low-voltage switchgear and controlgear – Part 3: Switches, disconnectors,
switch-disconnectors and fuse-combination units
Amendment 1:2012
IEC 60947-4-1:2009, Low-voltage switchgear and controlgear – Part 4-1: Contactors and
motor-starters – Electromechanical contactors and motor-starters
Amendment 1:2012
IEC 60947-6-2:2002, Low voltage switchgear and controlgear – Part 6-2: Multiple function
equipment – Control and protective switching devices (or equipment) (CPS)
Amendment 1:2007
Add the following new references to the existing list:
IEC 60417-DB , Graphical symbols for use on equipment
CISPR 11:2009, Industrial, scientific and medical equipment – Radio-frequency disturbance
characteristics – Limits and methods of measurement
Amendment 1:2010
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
3 Terms and definitions, symbols and abbreviations
Add the following new term and new reference to the existing list as follows:
S
Switching position . 3.3.4
3.3 Main contact positions
Add, after the existing term and definition 3.3.3, the following new term and definition:
3.3.4
switching position (of a TSE)
mechanical configuration of the main contacts of a TSE regarding the load connexion to a
source, which could be either connected to the normal source in the normal position, the
alternate source in the alternative position, or disconnected in the off position (if applicable)
3.4 Symbols and abbreviations
Add the following new symbols and abbreviations to the existing list:
___________
Available at: http://www.graphical-symbols.info/equipment

60947-6-1 Amend.1 © IEC:2013 – 5 –
ATSE Automatic transfer switching equipment
MTSE Manually operated transfer switching equipment
RTSE Remotely operated transfer switching equipment
TSE Transfer switching equipment
"r" Minimum short-circuit test current
I Rated conditional short-circuit current
q
4 Classification
Renumber the existing note as "NOTE 1".
Replace in a) the second existing dash by the following new dash:
– class CB: TSE that is capable of making, withstanding and is intended for breaking short-
circuit currents and is provided with over-current releases;
Replace, in the third existing dash of a), “short-circuit currents. TSE based" by "short-circuit
currents and is based".
Add, after the existing text of a), the following new notes:
NOTE 2 The mirror contact defined in IEC 60947-4-1 should be used to monitor the state of the contacts of a
class CC TSE.
NOTE 3 The appropriate ATSE classification for use for safety services in electrical supply systems is under
consideration.
Replace, in the second existing dash of b), "remote" by "remotely".
5.3 Rated and limiting values for the main circuit
Add, at the end of the existing text, "or in Table 11".
5.3.6.1 Rated short-time withstand current (I )
cw
Add, at the end of the third paragraph, "or in Table 11".
5.3.6.3 Rated short-circuit breaking capacity (I )
cn
Add, at the end of the first sentence of the third paragraph, "or in Table 11".
5.3.6.4 Rated conditional short-circuit current
Add, at the end of the second paragraph, "or in Table 11".
5.4 Utilization category
Replace, in the first paragraph, "assigned one" by "assigned to one" and replace "utilization
voltages" by "operational voltages".
5.5.2 Transfer control devices
Replace the existing item b) by the following new items:
b) the contact transfer time and the off time range for all TSE;
c) the operating transfer time and the return transfer time range for ATSE.
Add, after the existing text of this subclause, the following new text:

– 6 – 60947-6-1 Amend.1 © IEC:2013
The tolerance of the voltage frequency deviations and of the times shall be specified by the
manufacturer but no more than ±10 %. If the time value is lower than 1 s, the manufacturer
shall state the tolerances.
6.1 Nature of information
Replace the existing item h) by the following new item h):
h) rated short-circuit making capacity for class PC;
Add, at the end of item j), "for class PC and CC".
Replace the existing item n) by the following new item n):
n) operating sequence time data according to 5.5.2 b), time delays and their position in the
operating sequence if any;
Renumber the existing note as "NOTE 1".
Replace the existing item r) by the following new items and new note:
r) length of insulation to be removed before insertion of the conductor into the terminal;
s) maximum number of conductors which may be clamped;
t) 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.
u) switching position of the TSE.
NOTE 2 In the case of electronically controlled electromagnets, other information can also be necessary, for
example the control circuit configuration (see 4.5 and Annex U of IEC 60947-1:2007, Amendment 1 (2010)).
6.2 Marking
Replace, in the second paragraph, "and o)" by ", o) and u)".
Replace, in the last paragraph, "to r)" by "to t)".
6.3 Instructions for installation, operation and maintenance
Delete the existing second paragraph.
8.1.1.1 Resistance to abnormal heat and fire
Renumber this subclause as 8.1.1 and replace the existing text by the following new text:
Subclause 7.1.2 of IEC 60947-1:2007, Amendment 1 (2010) applies.
When tests on the equipment or on sections taken from the equip
...