IEC 62271-100:2008/AMD2:2017

IEC 62271-100 ®
Edition 2.0 2017-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
A MENDMENT 2
AM ENDEMENT 2
High-voltage switchgear and controlgear –
Part 100: Alternating-current circuit-breakers

Appareillage à haute tension –
Partie 100: Disjoncteurs à courant alternatif

IEC 62271-100:2008-04/AMD2:2017-06(en-fr)

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IEC 62271-100 ®
Edition 2.0 2017-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
A MENDMENT 2
AM ENDEMENT 2
High-voltage switchgear and controlgear –

Part 100: Alternating-current circuit-breakers

Appareillage à haute tension –

Partie 100: Disjoncteurs à courant alternatif

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.10 ISBN 978-2-8322-4357-2

– 2 – IEC 62271-100:2008/AMD2:2017
© IEC 2017
FOREWORD
This amendment has been prepared by subcommittee 17A: Switching devices, of IEC
technical committee 17: High-voltage switchgear and controlgear.
The text of this amendment is based on the following documents:
FDIS Report on voting
17A/1135/FDIS 17A/1139/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• withdrawn,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.
The contents of the corrigendum of January 2018 have been included in this copy.

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.
_____________
INTRODUCTION to the Amendment
This amendment includes the following significant technical changes:
– the rated TRV has been replaced by a rated first-pole-to-clear factor;
– the rated time quantities have been moved to Clause 5 (Design and construction) and are
no longer ratings. The determination of the break time has been moved to IEC 62271-306;
– the number of test specimens has been removed;
– new test procedure for test-duty T100a;
– TRVs for circuit-breakers having a rated voltage of 52 kV and below used in effectively
earthed neutral systems have been added;
– 6.111 (capacitive current switching) has been rewritten;
– a number of informative annexes have been moved to IEC TR 62271-306.

_____________
© IEC 2017
1.1 Scope
Add, after the third existing paragraph, the following paragraph:
This standard only covers direct testing.
1.2 Normative references
Replace, in the existing list, the reference to IEC 60137 by the following new reference:
IEC 60137:2008, Insulated bushings for alternating voltages above 1 000 V
Add, to the existing list, the following reference:
IEC 60270, High-voltage test techniques – Partial discharge measurements
3 Terms and definitions
3.1.132
cable system
Replace the existing references to "Table 1" (2 occurrences) to "Tables 24 and 44".
3.1.133
line system
Replace the existing definition by the following new definition, without modifying the notes.
system in which the TRV during breaking of terminal fault at 100 % of short-circuit breaking
current does not exceed the two-parameter envelope derived from Tables 25 and 45 of this
standard
Add, after the existing definition 3.1.133, the following new terms and definitions:
3.1.134
belted cable
multi-conductor cable in which part of the insulation is applied to each conductor individually,
and the remainder is applied over the assembled cores
[IEV 461-06-11]
3.1.135
individually screened cable
radial field cable
cable in which each core is covered with an individual screen
[IEV 461-06-12]
3.4.120
circuit-breaker class S2
Replace the existing definition by the following new definition:
circuit-breaker used in a line-system
Add, after definition 3.4.120, the following new term and definition:

– 4 – IEC 62271-100:2008/AMD2:2017
© IEC 2017
3.4.121
current chopping
current interruption prior to the natural power frequency current zero of the circuit connected
3.7.133
opening time
Replace the existing term, definition and notes as follows:
opening time (of a mechanical switching device)
[IEV 441-17-36]
3.7.134
arcing time (of a multipole switching device)
Replace the existing term, definition and source as follows:
arcing time (of a pole)
interval of time between the instant of the initiation of an arc in a pole and the instant of final
arc extinction in that pole
[IEV 441-17-37]
3.7.135
break-time
Replace the existing definition by the following:
interval of time between the beginning of the opening time of a mechanical switching device
and the end of the total arcing time
[IEV 441-17-39, modified]
3.7.136
closing time
Add, after the existing definition, the following new source:
[IEV 441-17-41, modified]
3.7.137
make time
Replace the source of the definition as follows:
[IEV 441-17-40, modified]
3.7.140
dead time (during auto-reclosing)
Add, after the existing note, the following source:
[IEV 441-17-44, modified]
3.7.144
make-break time
Replace the existing definition together with the notes by the following:
interval of time between the initiation of current flow in the first pole during a closing operation
and the end of the total arcing time during the subsequent opening operation

© IEC 2017
[IEV 441-17-43, modified]
3.7.159
minimum clearing time
Replace the definition and note as follows:
sum of the minimum opening time, minimum relay time (0,5 cycle) and the shortest arcing
time of a minor loop interruption in the phase with intermediate asymmetry that starts with a
minor loop at short-circuit current initiation
NOTE 1 This definition is applicable only for the determination of the test parameters during short-circuit breaking
tests according to test duty T100a.
NOTE 2 For testing purposes the minimum arcing time found during test-duty T100s is used.
Add, after the existing definition 3.7.160 added by Amendment 1, the following new terms and
definitions:
3.7.161
initiation of (opening or closing) operation
instant of receipt of command for operation at the control circuit
3.7.162
total arcing time
interval of time between the instant of the first initiation of an arc in a pole and the instant of
arc extinction in all poles
3.7.163
direct connection to an overhead line
connection between a circuit-breaker and an overhead line having a capacitance less than
5 nF
NOTE When the cable capacitance per unit length is 0,3 nF/m, it corresponds to a length of cable shorter than
approximately 17 m. For further information see IEC TR 62271-306.
3.8 Index of definitions
Add, to the existing alphabetical list, the following new lines:
belted cable . 3.1.134
current chopping . 3.4.121
direct connection to an overhead line . 3.7.163
individually screened cable . 3.1.135
initiation of (opening or closing) operation . 3.7.161
total arcing time . 3.7.162
4 Ratings
Replace item l) by the following new item:
l) rated first-pole-to-clear factor;
Replace the existing item o) by the following new item:

– 6 – IEC 62271-100:2008/AMD2:2017
© IEC 2017
o) void.
Replace item q) by the following new item:
q) rated line-charging breaking current, for circuit-breakers switching overhead transmission
lines (mandatory for circuit-breakers of rated voltages above 52 kV and circuit-breakers of
class S2);
Delete the existing item r) from the end of the second existing list, and place it at the
beginning of the third existing list before item s).
4.10 Rated pressures of compressed gas supply for insulation, operation and/or
interruption
Replace the title by the following:
4.10 Rated pressure of compressed gas supply for controlled pressure systems
Add, between subclause
...