EN 62271-100:2001/A2:2006

SLOVENSKI STANDARD
01-december-2007
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High-voltage switchgear and controlgear -- Part 100: High-voltage alternating-current
circuit-breakers (IEC 62271-100:2001/A2:2006)
Hochspannungs-Schaltgeräte und -Schaltanlagen -- Teil 100: Hochspannungs-
Wechselstrom-Leistungsschalter (IEC 62271-100:2001/A2:2006)
Appareillage a haute tension -- Partie 100: Disjoncteurs a courant alternatif a haute
tension (IEC 62271-100:2001/A2:2006)
Ta slovenski standard je istoveten z: EN 62271-100:2001/A2:2006
ICS:
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 62271-100/A2
NORME EUROPÉENNE
October 2006
EUROPÄISCHE NORM
ICS 29.130.10 Incorporates Corrigendum November 2006

English version
High-voltage switchgear and controlgear
Part 100: High-voltage alternating-current circuit-breakers
(IEC 62271-100:2001/A2:2006)
Appareillage à haute tension  Hochspannungs-Schaltgeräte und
Partie 100: Disjoncteurs à courant -Schaltanlagen
alternatif à haute tension Teil 100: Hochspannungs-Wechselstrom-
(CEI 62271-100:2001/A2:2006) Leistungsschalter
(IEC 62271-100:2001/A2:2006)
This amendment A2 modifies the European Standard EN 62271-100:2001; it was approved by CENELEC on
2006-10-01. 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, 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

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62271-100:2001/A2:2006 E

Foreword
The text of document 17A/754/FDIS, future amendment 2 to IEC 62271-100:2001, prepared by SC 17A,
High-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 A2 to EN 62271-100:2001
on 2006-10-01.
The following dates were fixed:
– latest date by which the amendment has to be
implemented at national level by publication of
(dop) 2007-07-01
an identical national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2009-10-01
with the amendment have to be withdrawn
Annex ZB has been added by CENELEC.
The contents of the corrigendum of November 2006 have been included in this copy.
__________
Endorsement notice
The text of amendment 2:2006 to the International Standard IEC 62271-100:2001 was approved by
CENELEC as an amendment to the European Standard without any modification.
__________
- 3 - EN 62271-100:2001/A2:2006
Annex ZB
(informative)
A-deviations
A-deviation: National deviation due to regulations, the alteration of which is for the time being outside the
competence of the CENELEC national member.
This European Standard does not fall under any Directive of the EC.
In the relevant CENELEC countries these A-deviations are valid instead of the provisions of the European
Standard until they have been removed.
Clause Deviation
(*)
1.1 Italy (I.S.P.E.S.L. Rules, 95 revision: VSR.8.B.1; VSR.8.B.2; M.15.D.2 to .4.)
For high-voltage alternating current circuit-breakers containing gas-filled compartments,
the design pressure is limited to a maximum of 0,5 bar (gauge) and the volume is limited
to a maximum of 2 m . Gas filled compartments having a design pressure exceeding
0,5 bar (gauge) or a volume exceeding 2 m shall be designed according to Italian
pressure vessel code for electrical switchgear (DM 1 December 1980 and DM
10 September 1981 published on Gazzetta Ufficiale n° 285 dated 16.10.1981). This
requirement is not applicable for gas filled compartments having a design pressure
exceeding 0,5 bar (gauge) but a volume not exceeding 25 dm .
Italian laws apply to gas pressurized enclosures made of both insulating and metallic
materials with a capacity of 25 litres or above, a design pressure higher than 0,05 kg/cm
and a temperature range: -25 °C/+100 °C (only for insulating materials).
Moreover the manufacturer of any electrical equipment which comprehends gas
pressurized enclosures must submit the design of the pressurized enclosures itself to a
proper legal Authority indicating the stresses and the loads which have any influence on
the design itself. For each of the stresses the manufacturer must indicate the design
values and the relevant computations.
Only the use of porcelain type A or S (Aluminous or Siliceous) is permitted.
(*)
I.S.P.E.S.L.: Istituto Superiore per la Prevenzione e la Sicurezza del Lavoro.
__________
INTERNATIONAL IEC
STANDARD 62271-100
AMENDMENT 2
2006-07
Amendment 2
High-voltage switchgear and controlgear –
Part 100:
High-voltage alternating-current circuit-breakers

This English-language version is derived from the original
bilingual publication by leaving out all French-language
pages. Missing page numbers correspond to the French-
language pages.
© IEC 2006 Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical,
including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
V
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

62271-100 Amend. 2  IEC:2006 – 3 –
FOREWORD
This amendment has been prepared by subcommittee 17A: High-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
17A/754/FDIS 17A/761/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.
_____________
Page 7
CONTENTS
Add, to the list, the following new Annexes L and M:
Annex L (informative) Explanatory notes on the revision of TRVs for circuit-breakers of rated
voltages higher than 1 kV and less than 100 kV
Annex M (normative) Requirements for breaking of transformer-limited faults by circuit-
breakers with rated voltage higher than 1 kV and less than 100 kV

Page 25
3 Definitions
Add, on page 31, the following definitions after 3.1.127:
3.1.128
effectively earthed neutral system
system earthed through a sufficiently low impedance such that for all system conditions the
ratio of the zero-sequence reactance to the positive-sequence reactance (X /X ) is positive
0 1
and less than 3, and the ratio of the zero-sequence resistance to the positive-sequence
reactance (R /X ) is positive and less than 1. Normally such systems are solidly earthed
0 1
(neutral) systems or low impedance earthed (neutral) systems
NOTE For the correct assessment of the earthing conditions not only the physical earthing conditions around the
relevant location but the total system is to be considered.

62271-100 Amend. 2  IEC:2006 – 5 –
3.1.129
non-effectively earthed neutral system
system other than effectively earthed neutral system, not meeting the conditions given in
3.1.128. Normally such systems are isolated neutral systems, high impedance earthed
(neutral) systems or resonant earthed (neutral) systems
NOTE For the correct assessment of the earthing conditions not only the physical earthing conditions around the
relevant location but the total system is to be considered.

Add, on page 33, the following definitions after 3.4.118:
3.4.119
cable system
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 Table 24 of this standard
NOTE 1 This definition is restricted to systems of rated voltages higher than 1 kV and less than 100 kV.
NOTE 2 Circuit-breakers of indoor substations with cable connection are generally in cable-systems.
NOTE 3 A circuit-breaker in an outdoor substation is considered to be in a cable-system if the total length of
cable (or equivalent length when capacitors are also present) connected on the supply side of the circuit-breaker is
at least 100 m. However if in an actual case with an equivalent length of cable shorter than 100 m a calculation can
show that the actual TRV is covered by the envelope defined from Table 24, then this system is considered as a
cable system.
NOTE 4 The capacitance of cable-systems on the supply side of circuit-breakers is provided by cables and/or
capacitors and/or insulated bus.
3.4.120
line system
system in which the TRV during breaking of terminal fault at 100 % of short-circuit breaking
current is covered by the two-parameter envelope derived from Table 25 of this standard and
exceeds the two-parameter envelope derived from Table 24 of this standard
NOTE 1 This definition is restricted to systems of rated voltages equal to or higher than 15 kV and less than
100 kV.
NOTE 2 In line-systems, no cable is connected on the supply side of the circuit-breaker, with the possible
exception of a total length of cable less than 100 m between the circuit-breaker and the supply transformer(s).
NOTE 3 Systems with overhead lines directly connected to a busbar (without intervening cable connections) are
typical examples of line-systems.
3.4.121
circuit-breaker class S1
circuit-breaker intended to be used in a cable system
3.4.122
circuit-breaker class S2
circuit-breaker intended to be used in a line-system, or in a cable-system with direct
connection (without cable) to overhead lines

Page 55
3.8 Index of definitions
Add the following definitions in the list of index:

62271-100 Amend. 2  IEC:2006 – 7 –
C
Cable system. 3.4.119
Circuit-breaker class S1. 3.4.121
Circuit-breaker class S2. 3.4.122
E
Effectively earthed neutral system . 3.1.128
L
Line system . 3.4.120
N
Non-effectively earthed neutral system . 3.1.129

Page 63
4 Rating
Replace, on page 65, the existing item p) by the following:
p) characteristics for short-line faults related to the rated short-circuit breaking current, for
circuit-breakers designed for direct connection to overhead lines, irrespective of the type
of network on the source side, and rated at 15 kV and above and at more than 12,5 kA
rated short-circuit breaking current;

Page 73
4.102.2 Representation of TRV
Replace, on page 75, the existing items b) and c) by the following:
b) Two-parameter reference line (see Figure 11):
u = reference voltage (TRV peak value), in kV;
c
t = time in µs.
TRV parameters are defined as a function of the rated voltage (U ), the first-pole-to-clear
r
factor (k ) and the amplitude factor (k ) as follows:
pp af
u = k × k (2/3 ) × U
c pp af r
where k is equal to
af
1,4 for terminal fault in the case of cable systems;
1,54 for terminal fault and short-line fault, in the case of line systems;
1,25 for out-of-phase;
t for the supply side circuit for short-line fault = t (terminal fault).
t for out-of-phase = 2 × t (terminal fault).
3 3
62271-100 Amend. 2  IEC:2006 – 9 –
c) Delay line of TRV (see Figures 10 and 11):
t = time delay, in microseconds;
d
u’ = reference voltage, in kilovolts;
t’ = time to reach u’, in microseconds
The delay line starts on the time axis at the rated time delay and runs parallel to the first
section of the reference line of rated TRV and terminates at the voltage u’ (time co-
ordinate t’).
For rated voltages lower than 100 kV:
t = 0,15 × t , for terminal fault and out-of-phase in the case of cable systems;
d 3
t = 0,05 × t , for terminal fault and short-line-fault in the case of line systems;
d 3
t = 0,15 × t , for out-of-phase in the case of line systems;
d 3
u’ = u /3 ;
c
t’ is derived from t and t according to Figure 11, t’ = t + t /3.

d 3 d 3
For rated voltages equal or higher than 100 kV:
t = 2 µs for terminal fault and for the supply side circuit for short-line fault;
d
t = 2 µs to 0,1 × t for out-of-phase;
d 1
u’ = u /2 ;
t’ is derived from u’, u /t (RRRV) and t according to Figure 10, t’ = t + u’/RRRV.
1 1 d d
Page 77
4.102.3 Standard values of TRV related to the rated short-circuit breaking current
Replace the first paragraph by the following:
Standard values of TRV for three-pole circuit-breakers of rated voltages less than 100 kV
make use of two parameters. Values are given in:
– Table 24, for cable systems;
– Table 25, for line systems.
Replace the fourth paragraph by the following:
The values given in the tables are prospective values. They apply to circuit-breakers for
general transmission and distribution in three-phase systems having service frequencies of
50 Hz or 60 Hz and consisting of transformers, overhead lines and cables.
Replace the existing item b) by the following:
b) circuit-breakers directly connected to transformers without appreciable additional
capacitance between the circuit-breaker and the transformer which provides approximately
50 % or more of the rated short-circuit breaking-current of the circuit-breaker. However the
special case of circuit-breakers of rated voltage less than 100 kV with a connection of low
capacitance to a transformer is covered in Annex M.

62271-100 Amend. 2  IEC:2006 – 11 –
Replace the existing item c) by the following:
c) circuit-breakers in substations with series reactors (information is given in 8.103.7 and in
Clause L.5 for circuit-breakers rated less than 100 kV);
Replace the sixth paragraph by the following:
The transient recovery voltage corresponding to the rated short-circuit breaking current when
a terminal fault occurs, is used for testing at short-circuit breaking currents equal to the rated
value. However, for testing with short-circuit breaking currents less than 100 % of the rated
value, other values of transient recovery voltage are specified (see 6.104.5). Further
additional requirements apply to circuit-breakers designed for direct connection to overhead
lines, rated at 15 kV and above and having rated short-circuit breaking currents exceeding
12,5 kA, which may be operated in short-line fault conditions (see 4.105).

Page 77
4.102.3 Standard values of TRV related to the rated short-circuit breaking current
Replace, on page 79, title and Table 1a by the following tables:

62271-100 Amend. 2  IEC:2006 – 13 –
Table 24 – Standard values of transient recovery voltage for class S1 circuit-breakers –
Rated voltage higher than 1 kV and less than 100 kV –
Representation by two parameters

a
Rated Type of test First-pole- Ampli- TRV Time Time Voltage Time RRRV
voltage to-clear tude peak delay

factor factor value
u /t
c 3
U k k u u’ t’
r pp af c t3 td
kV/µs
kV p.u. p.u. kV µs µs kV µs
Terminal 1,5 1,4 6,2 41 6 2,1 20 0,15
fault
3,6
Out-of- 2,5 1,25 9,2 82 12 3,1 40 0,11
phase
Terminal 1,5 1,4 8,2 44 7 2,7 21 0,19
fault
b
4,76
Out-of- 2,5 1,25 12,1 88 13 4,0 43 0,14
phase
Terminal 1,5 1,4 12,3 51 8 4,1 25 0,24
fault
7,2
Out-of- 2,5 1,25 18,4 102 15 6,1 49 0,18
phase
Terminal 1,5 1,4 14,1 52 8 4,7 25 0,27
fault
b
8,25
Out-of- 2,5 1,25 21,1 104 16 7,0 50 0,20
phase
Terminal
1,5 1,4 20,6 61 9 6,9 29 0,34
fault
Out-of-
2,5 1,25 30,6 122 18 10,2 59 0,25
phase
Terminal 1,5 1,4 25,7 66 10 8,6 32 0,39
fault
b
Out-of- 2,5 1,25 38,3 132 20 12,8 64 0,29
phase
Terminal 1,5 1,4 30 71 11 10,0 34 0,42
fault
17,5
Out-of- 2,5 1,25 44,7 142 21 14,9 69 0,31
phase
Terminal 1,5 1,4 41,2 87 13 13,7 42 0,47
fault
Out-of- 2,5 1,25 61,2 174 26 20,4 84 0,35
phase
Terminal 1,5 1,4 44,2 91 14 14,7 44 0,49
fault
b
25,8
Out-of- 2,5 1,25 65,8 182 27 21,9 88 0,36
phase
Terminal 1,5 1,4 61,7 109 16 20,6 53 0,57
fault
Out-of-
2,5 1,25 91,9 218 33 30,6 105 0,42
phase
Terminal 1,5 1,4 65,2 109 16 21,7 53 0,60
fault
b
Out-of- 2,5 1,25 97,0 218 33 32,3 105 0,45
phase
Terminal 1,5 1,4 82,8 125 19 27,6 60 0,66
fault
b
48,3
Out-of- 2,5 1,25 123 250 38 41,1 121 0,49
phase
Terminal 1,5 1,4 89,2 131 20 29,7 63 0,68
fault
Out-of- 2,5 1,25 133 262 39 44,2 127 0,51
phase
Terminal 1,5 1,4 124 165 25 41,4 80 0,75
fault
72,5
Out-of- 2,5 1,25 185 330 50 61,7 160 0,56
phase
a
RRRV = rate of rise of recovery voltage.
b
Used in North America.
62271-100 Amend. 2  IEC:2006 – 15 –
c
Table 25 – Standard values of transient recovery voltage for class S2 circuit-breakers –
Rated voltage equal to or higher than 15 kV and less than 100 kV –
Representation by two parameters

a
Rated Type of test First-pole- Ampli- TRV Time Time Voltage Time RRRV
voltage to-clear tude peak delay

factor factor value
u /t
c 3
U k k u t t u’ t’
r pp af c 3 d
kV/µs
kV p.u. p.u. kV µs µs kV µs
b
15 Terminal fault 1,5 1,54 28,3 31 2 9,4 12 0,91
Short-line 1 1,54 18,9 31 2 6,3 12 0,61
fault
Out-of-phase 2,5 1,25 38,3 62 9 12,8 30 0,62
17,5 Terminal fault 1,5 1,54 33,0 34 2 11,0 13 0,97
Short-line 1 1,54 22,0 34 2 7,3 13 0,65
fault
Out-of-phase 2,5 1,25 45 68 10 14,9 33 0,65
24 Terminal fault 1,5 1,54 45,3 43 2 15,1 16 1,05
Short-line 1 1,54 30,2 43 2 10,1 16 0,70
fault
Out-of-phase 2,5 1,25 61 86 13 20,4 42 0,71

b
25,8 Terminal fault 1,5 1,54 48,7 45 2 16,2 17 1,08
Short-line 1 1,54 32,4 45 2 10,8 17 0,72
fault
Out-of-phase 2,5 1,25 66 90 14 21,9 44 0,73
36 Terminal fault 1,5 1,54 67,9 57 3 22,6 22 1,19
Short-line 1 1,54 45,3 57 3 15,1 22 0,79
fault
Out-of-phase 2,5 1,25 92 114 17 30,6 55 0,81

b
38 Terminal fault 1,5 1,54 71,7 59 3 23,9 23 1,21
Short-line 1 1,54 47,8 59 3 15,9 23 0,81
fault
Out-of-phase 2,5 1,25 97 118 18 32,3 57 0,82

b
48,3 Terminal fault 1,5 1,54 91,1 70 4 30,4 27 1,30
Short-line 1 1,54 60,7 70 4 20,2 27 0,87
fault
Out-of-phase 2,5 1,25 123 140 21 41,1 68 0,88
52 Terminal fault 1,5 1,54 98,1 74 4 32,7 28 1,33
Short-line 1 1,54 65,4 74 4 21,8 28 0,88
fault
Out-of-phase 2,5 1,25 133 148 22 44,2 72 0,90
72,5 Terminal fault 1,5 1,54 137 93 5 45,6 36 1,47
Short-line 1 1,54 91,2 93 5 30,4 36 0,98
fault
Out-of-phase 2,5 1,25 185 186 28 61,7 90 0,99

a
RRRV = rate of rise of recovery voltage.

b
Used in North America.
c
For short-line faults: transient recovery voltage and time quantities are those of the supply circuit. Short-line fault is
only applicable for circuit-breakers designed for direct connection to overhead lines.

62271-100 Amend. 2  IEC:2006 – 17 –
Replace, on page 85 and Amendment 1, the heading of Table 2 by the following:
Table 2 – Standard multipliers for transient recovery voltage values for second and
third clearing poles for rated voltages above 1 kV

Replace, on page 85, NOTE 1 by the following:
NOTE 1 Values for rated voltages less than 100 kV are under consideration.

Page 89
4.105 Characteristics for short-line faults
Replace the existing text of 4.105 by the following:
Characteristics for short-line faults are required for class S2 circuit-breakers designed for
direct connection to overhead lines (without intervening cable connections) and having a rated
voltage of 15 kV and above and a rated short-circuit breaking current exceeding 12,5 kA.
These characteristics relate to the breaking of a single-phase earth fault in a system with
earthed neutral, where the first-pole-to-clear factor is equal to 1,0.
NOTE In this standard, a single-phase test at phase-to-earth voltage covers all types of short-line fault (see
Annex L, Clause L.3).
The short-line fault circuit is composed of a supply circuit on the source side of the circuit-
breaker and a short-line on its load side (see Figure 15), with the following characteristics:
a) supply circuit characteristics:
– voltage equal to the phase-to-earth voltage U /√3 corresponding to the rated voltage U
r r
of the circuit-breaker;
– short-circuit current, in case of terminal fault, equal to the rated short-circuit breaking
current of the circuit-breaker;
− prospective transient recovery voltage, in case of short-line fault, given by the
standard values in
ƒ Table 25, for circuit-breakers in line systems with rated voltages less than 100 kV ;
ƒ Tables 1b and 1c, for circuit-breakers with rated voltages from 100 kV up to and
including 170 kV;
ƒ Table 1d, for circuit-breakers with rated voltages 245 kV and above.
– ITRV characteristics for circuit-breakers of 100 kV and above derived from Table 3.
b) line characteristics:
– standard values of the RRRV factor, based on a surge impedance Z of 450 Ω, the peak
factor k and the line side time delay t are given in Table 4. For determination of the
dL
line side time delay and the rate-of-rise of the line side voltage, see Figure 16;
− the method for calculation of transient recovery voltages from the characteristics is
given in Annex A.
62271-100 Amend. 2  IEC:2006 – 19 –
Replace, on page 91, the existing Table 4, by the following new table:
Table 4 – Standard values of line characteristics for short-line faults
Rated Number of Surge Peak RRRV factor Time
voltage conductors impedance factor delay
per phase 50 Hz   I   60 Hz
U Z k s* t
r dL
kV
Ω (kV/µs)/kA µs
1 450 1,6 0,200 0,240 0,1
15 ≤ U ≤ 38
r
48,3 ≤ U ≤ 170 1 to 4 450 1,6 0,200 0,240 0,2
r
1 to 4 450 1,6 0,200 0,240 0,5
U ≥ 245
r
NOTE These values cover the short-line faults dealt with in this standard. For very short lines
(t < 5t ) not all requirements as given in the table can be met. The procedures for approaching very
L dL
short lines will be given in the application guide to this standard (currently prepared by CIGRE WG A3-
11).
* For the RRRV factor s, see Annex A.

Page 91
4.106 Rated out-of-phase making and breaking current
Replace the existing item b) by the following:
b) the transient recovery voltage shall be in accordance with:
– Table 24, for circuit-breakers in cable systems with rated voltages less than 100 kV;
– Table 25, for circuit-breakers in line systems with rated voltages less than 100 kV;
– Tables 1b and 1c, for circuit-breakers with rated voltages from 100 kV up to and
including 170 kV;
– Table 1d, for circuit-breakers with rated voltages 245 kV and above.

Page 111
Table 6 – Nameplate information
Replace, on page 113, the row on classification with the following:
Abbrevi- Unit Circuit- Operating Condition:
ation breaker device Marking only required if
Classification  y If different from E1, C1, M1,
S1 for rated voltages less
than 100 kV
If different from E1, C1, M1
for rated voltages 100 kV
and above
62271-100 Amend. 2  IEC:2006 – 21 –
Page 119
Table 7 – Type tests
Replace “short-line fault tests *” by the following:
* #
Short-line fault tests (U ≥ 15 kV and I > 12,5 kA, in case of direct connection to
r sc
overhead lines in systems with earthed neutral)

Page 203 and Amendment 1
6.104.5.1 General
Replace, on page 205, the fifth paragraph and item a) by the following:
TRV parameters are defined as follows as a function of the rated voltage (U ), the first-pole-
r
to-clear factor (k ) and the amplitude factor (k ). The actual values of k and k are stated
pp af pp af
in Tables 24, 25, 1b, 1c, 26, 27, 14a and 14b. The first-pole-to-clear factor kpp is 1,3 as listed
in Table 14a for all circuit-breakers rated 100 kV and above where systems are usually
effectively earthed. For non-effectively earthed systems from 100 kV to 170 kV, kpp = 1,5 as
listed in Table 14b.
a) For rated voltages less than 100 kV
A representation by two parameters of the prospective TRV is used for all test-duties.
– In Table 26, for circuit-breakers in cable systems.
u = k × k (2/3 ) × U where k is equal to 1,4 for test-duty T100, 1,5
TRV peak value
c pp af r af
for test-duty T60, 1,6 for test duty T30 and 1,7 for test duty T10, 1,25 for out-of-phase
breaking.
Time t for test-duty T100 is taken from Table 24. Time t for test-duties T60, T30 and T10
3 3
is obtained by multiplying the time t for test-duty T100 by 0,44 (for T60), 0,22 (for T30)
and 0,22 (for T10).
– In Table 27, for circuit-breakers in line systems.
TRV peak value u = k × k (2/3 ) × U where k is equal to 1,54 for test-duty T100 and
c pp af r
af
the supply side circuit for short-line fault, 1,65 for test-duty T60, 1,74 for test duty T30 and
1,8 for test duty T10, 1,25 for out-of-phase breaking.
Time t for test-duty T100 is taken from Table 25 Time t for test-duties T60, T30 and T10
.
3 3
is obtained by multiplying the time t for test-duty T100 by 0,67 (for T60), 0,40 (for T30)
and 0,40 (for T10).
– Time delay t for test-duty T100 is 0,15 × t for cable systems, 0,05 × t for line systems,
d 3 3
0,05 × t for the supply side circuit for short-line fault.
– Time delay t is 0,15 × t for test-duties T60, T30 and T10 and for out-of-phase breaking.
d 3
– Voltage u'=u /3.
c
– Time t' is derived from u', t and t according to Figure 11, t’ = t + t /3.
3 d d 3
62271-100 Amend. 2  IEC:2006 – 23 –
Page 207 and Amendment 1
6.104.5.2 Test duties T100s and T100a
Replace the first five paragraphs by the following:
For rated voltages less than 100 kV, the specified standard values are given in
– Table 26 for circuit-breakers in cable systems,
– Table 27 for circuit-breakers in line systems.
For rated voltages of 100 kV and above, the specified standard values are given in Tables
14a and 14b.
The specific reference lines, delay lines and ITRV are given by the standard values in Tables
24, 25, 1b, 1c, 1d, 2 and 3.
With reference to ITRV, if a test is made with a TRV following the straight reference line
specified in requirement b) of 6.104.5.1 and shown in Figure 12b, it is assumed that the effect
on the circuit-breaker is similar to that of any ITRV defined in requirement b) of 6.104.5.1 and
Figure 12b.
Owing to limitations of the testing station, it may not be feasible to comply with the
requirement of item b) of 6.104.5.1 with respect to the time delay t as specified in Tables 1b,
d
1c or 1d. Where short-line fault duties are also to be performed, any such deficiency of the
TRV of the supply circuit shall be compensated by an increase of the voltage excursion to the
first peak of the line-side voltage (see 6.109.3). The time delay of the supply circuit shall be
as small as possible, but shall in any case not exceed the values given in brackets in Table
27 or Table 14a or Table 14b.
Page 209 and Amendment 1
6.104.5.3 Test-duty T60
Replace the text of 6.104.5.3 by the following:
For rated voltages less than 100 kV, the specified standard values are given in
– Table 26 for circuit-breakers in cable systems,
– Table 27 for circuit-breakers in line systems.
For rated voltages of 100 kV and above, the specified standard values are given in Table 14a
and Table 14b.
6.104.5.4 Test-duty T30
Replace the text of 6.104.5.4 by the following:
a) For rated voltages less than 100 kV, the specified standard values are given in
– Table 26 for circuit-breakers in cable systems,
– Table 27 for circuit-breakers in line systems.
In direct or synthetic testing, it may be difficult to meet the small values of time t . The
shortest time that can be met should be used but not less than the values specified. The
values used shall be stated in the test report.

62271-100 Amend. 2  IEC:2006 – 25 –
b) For rated voltages of 100 kV and above, the specified standard values are given in Tables
14a and 14b.
NOTE The contribution of transformers to the short-circuit current is relatively larger at smaller values of short-
circuit current as in T30 and T10 conditions. However, most systems have effectively earthed neutrals at ratings of
100 kV and above. With the system and transformer neutrals effectively earthed, the first-pole-to-clear factor of 1,3
is applicable for all test duties. In some systems for rated voltages of 100 kV up to and including 170 kV,
transformers with non-effectively earthed neutrals are in service, even though the rest of the system may have
effectively earthed neutrals. Such systems are considered special cases and are covered in Tables 1c and 14b
where the TRVs specified for all test duties are based on a first-pole-to-clear factor of 1,5. For rated voltages
above 170 kV, all systems and their transformers are considered to have effectively earthed neutrals.

6.104.5.5 Test-duty T10
Replace the text of 6.104.5.5 by the following:
a) For rated voltages less than 100 kV, the specified standard values are given in
– Table 26 for circuit-breakers in cable systems,
– Table 27 for circuit-breakers in line systems.
b) For rated voltages of 100 kV and above, the specified standard values are given in Tables
14a and 14b. The time t is a function of the natural frequency of transformers.
In direct or synthetic testing, for rated voltages 1 kV and above, it may be difficult to meet the
small values of time t . The shortest time that can be met should be used but not less than
the values specified. The values used shall be stated in the test report.

Page 213
Table 13 – Standard values of prospective transient recovery voltage – Rated voltage below
100 kV – Representation by two parameters
Replace Table 13 by the following Tables 26 and 27:

62271-100 Amend. 2  IEC:2006 – 27 –
Table 26 – Standard values of prospective transient recovery voltage for class S1
circuit-breakers – Rated voltage higher than 1 kV and less than 100 kV –
Representation by two parameters
a
Rated Test duty First-pole- Ampli- TRV Time Time Voltage Time RRRV
voltage to-clear tude peak delay

factor factor value
u /t
c 3
U k k u t t u’ t’
r pp af c 3 d
kV/µs
kV p.u. p.u. kV µs µs kV µs
T100 1,5 1,4 6,2 41 6 2,1 20 0,15
T60 1,5 1,5 6,6 18 3 2,2 9 0,37
3,6
T30 1,5 1,6 7,1 9 1,4 2,4 4,4 0,79
T10 1,5 1,7 7,5 9 1,4 2,5 4,4 0,83
T100 1,5 1,4 8,2 44 7 2,7 21 0,19
T60 1,5 1,5 8,7 19 3 2,9 9 0,46
b
4,76
T30 1,5 1,6 9,3 10 1,5 3,1 5 0,93
T10 1,5 1,7 9,9 10 1,5 3,3 5 0,99
T100 1,5 1,4 12,3 51 8 4,1 25 0,24
T60 1,5 1,5 13,2 22 3 4,4 11 0,60
7,2
T30 1,5 1,6 14,1 11 2 4,7 5 1,28
T10 1,5 1,7 15,0 11 2 5,0 5 1,36
T100 1,5 1,4 14,1 52 8 4,7 25 0,27
T60 1,5 1,5 15,2 23 3 5,1 11 0,66
b
8,25
T30 1,5 1,6 16,2 11 2 5,4 6 1,47
T10 1,5 1,7 17,2 11 2 5,7 6 1,56
T100 1,5 1,4 20,6 61 9 6,9 29 0,34
T60 1,5 1,5 22,0 27 4 7,3 13 0,81
T30 1,5 1,6 23,5 13 2 7,8 6 1,81
T10 1,5 1,7 25,0 13 2 8,3 6 1,92
T100 1,5 1,4 25,7 66 10 8,6 32 0,39
T60 1,5 1,5 27,6 29 4 9,2 14 0,95
b
T30 1,5 1,6 29,4 15 2 9,8 7 1,96
T10 1,5 1,7 31,2 15 2 10,4 7 2,08
T100 1,5 1,4 30,0 71 11 10,0 34 0,42
T60 1,5 1,5 32,1 31 5 10,7 15 1,04
17,5
T30 1,5 1,6 34,3 16 2 11,4 8 2,14
T10 1,5 1,7 36,4 16 2 12,1 8 2,28

62271-100 Amend. 2  IEC:2006 – 29 –
Table 26 (continued)
a
Rated Test duty First-pole- Ampli- TRV Time Time Voltage Time RRRV
voltage to-clear tude peak delay

factor factor value
u /t
c 3
U k k u t t’
r t t
pp af c 3
d d
kV/µs
kV p.u. p.u kV µs µs kV µs
T100 1,5 1,4 41 87 13 13,7 42 0,47
T60 1,5 1,5 44,1 38 6 14,7 19 1,16
T30 1,5 1,6 47,0 19 3 15,7 9 2,47
T10 1,5 1,7 50 19 3 16,7 9 2,63
T100 1,5 1,4 44,2 91 14 14,7 44 0,49
T60 1,5 1,5 47,4 40 6 15,8 18 1,19
b
25,8
T30 1,5 1,6 50,6 20 3 16,9 10 2,53
T10 1,5 1,7 53,7 20 3 17,9 10 2,69
T100 1,5 1,4 61,7 109 16 20,6 53 0,57
T60 1,5 1,5 66,1 48 7 22 23 1,38
T30 1,5 1,6 70,5 24 3,6 23,5 12 2,94
T10 1,5 1,7 75,0 24 3,6 25 12 3,13
T100 1,5 1,4 65,2 109 16 21,7 53 0,60
T60 1,5 1,5 69,8 48 7 23,3 23 1,45
b
T30 1,5 1,6 74,5 24 3,6 24,8 12 3,1
T10 1,5 1,7 79,1 24 3,6 26,4 12 3,3
T100 1,5 1,4 82,8 125 19 27,6 60 0,66
T60 1,5 1,5 88,7 55 8 29,6 27 1,61
b
48,3
T30 1,5 1,6 94,6 28 4 31,5 13 3,38
T10 1,5 1,7 101 28 4 33,5 13 3,61
T100 1,5 1,4 89,2 131 20 29,7 63 0,68
T60 1,5 1,5 95,5 58 9 31,8 28 1,65
T30 1,5 1,6 102 29 4 34 14 3,52
T10 1,5 1,7 108 29 4 36,1 14 3,72
T100 1,5 1,4 124 165 25 41,4 80 0,75
T60 1,5 1,5 133 73 11 44,4 35 1,82
72,5
T30 1,5 1,6 142 36 5 47,4 18 3,94
T10 1,5 1,7 151 36 5 50,3 18 4,19

a
RRRV = rate of rise of recovery voltage.
b
Used in North America.
62271-100 Amend. 2  IEC:2006 – 31 –
c
Table 27 – Standard values of prospective transient recovery voltage
for class S2 circuit-breakers – Rated voltage equal to or higher than 15 kV
and less than 100 kV – Representation by two parameters

a
Rated Test duty First-pole- Ampli- TRV Time Time Voltage Time RRRV
voltage to-clear tude peak delay

factor factor value
u /t
c 3
U k k u t t u’ t’
r pp af c 3 d
kV/µs
kV p.u. p.u. kV µs µs kV µs
T100 1,5 1,54 28,3 31 2 (5) 9,4 12 (15) 0,91
T60 1,5 1,65 30,3 21 3 10,1 10 1,44
b
T30 1,5 1,74 32,0 12,5 2 10,7 6 2,56
T10 1,5 1,80 33,1 12,5 2 11,0 6 2,67
T100 1,5 1,54 33,0 34 2 (5) 11,0 13 (17) 0,97
T60 1,5 1,65 35,3 23 3 11,8 11 1,53
17,5
T30 1,5 1,74 37,3 14 2 12,4 7 2,66
T10 1,5 1,8 38,6 14 2 12,9 7 2,76
T100 1,5 1,54 45,3 43 2 (6) 15,1 16 (21) 1,05
T60 1,5 1,65 48,4 29 4 16,1 14 1,67
T30 1,5 1,74 51,2 17 3 17,0 8 3,01
T10 1,5 1,8 52,9 17 3 17,6 8 3,11
T100 1,5 1,54 48,7 45 2 (7) 16,2 17 (22) 1,08
T60 1,5 1,65 52,1 30 5 17,4 15 1,74
b
25,8
T30 1,5 1,74 55,0 18 3 18,3 9 3,06
T10 1,5 1,8 56,9 18 3 19,0 9 3,16
T100 1,5 1,54 67,9 57 3 (9) 22,6 22 (28) 1,19
T60 1,5 1,65 72,7 38 6 24,2 18 1,91
T30 1,5 1,74 76,7 23 3 25,6 11 3,33
T10 1,5 1,8 79,4 23 3 26,5 11 3,45
T100 1,5 1,54 71,7 59 3 (9) 23,9 23 (29) 1,22
T60 1,5 1,65 76,8 40 6 25,6 19 1,92
b
T30 1,5 1,74 81,0 24 4 27,0 11,9 3,38
T10 1,5 1,8 83,8 24 4 28,0 11,9 3,49
T100 1,5 1,54 91,1 70 4 (11) 30,4 27 (34) 1,30
T60 1,5 1,65 97,5 47 7 32,5 23 2,07
b
48,3
T30 1,5 1,74 103 28 4 34,3 13,5 3,68
T10 1,5 1,8 107 28 4 35,5 13,5 3,82
T100 1,5 1,54 98,1 74 4 (11) 32,7 28 (36) 1,33
T60 1,5 1,65 105 50 7 35,0 24 2,10
T30 1,5 1,74 111 30 4 36,9 14 3,70
T10 1,5 1,8 115 30 4 38,3 14 3,83
T100 1,5 1,54 137 93 5 (14) 45,6 36 (45) 1,47
T60 1,5 1,65 146 62 9 48,8 30 2,35
72,5
T30 1,5 1,74 155 37 6 51,5 18 4,19
T10 1,5 1,8 160 37 6 53,3 18 4,32

62271-100 Amend. 2  IEC:2006 – 33 –
Table 27 (continued)
a
RRRV = rate of rise of recovery voltage.
b
Used in North America.
c
Where two values of the times t and t’ are given, separated by brackets (T100), the one in brackets can be used
d
if short-line fault tests are also made. If this is not the case, the lower values of t and t’ apply.
d
Page 227 and Amendment 1
6.106.1 Test-duty T10
Replace the text of 6.106.1 by the following:
Test-duty T10 consists of the rated operating sequence at 10 % of the rated short-circuit
breaking current with a d.c. component of less than 20 % and a transient and power
frequency recovery voltage as specified in 6.104.5.5 and 6.104.7 (see also Tables 26, 27, 14a
and 14b).
6.106.2 Test-duty T30
Replace the text of 6.106.2 by the following:
Test-duty T30 consists of the rated operating sequence at 30 % of the rated short-circuit
breaking current with a d.c. component of less than 20 % and a transient and power
frequency recovery voltage as specified in 6.104.5.4 and 6.104.7 (see also Tables 26, 27, 14a
and 14b).
6.106.3 Test-duty T60
Replace the text of 6.106.3 by the following:
Test-duty T60 consists of the rated operating sequence at 60 % of the rated short-circuit
breaking current with a d.c. component of less than 20 % and a transient and power
frequency recovery voltage as specified in 6.104.5.3 and 6.104.7 (see also Tables 26, 27, 14a,
14b).
6.106.4 Test-duty T100s
Replace the first paragraph of 6.106.4 by the following:
Test-duty T100s consists of the rated operating sequence at 100 % of the rated short-circuit
breaking current, taking account of 6.104.3, and with
– a transient and power frequency recovery voltage as specified in Tables 26, 27, 14a, 14b
and 6.104.7, and
– 100 % of the rated short-circuit making current, taking account of 6.104.2, and
– an applied voltage as specified in 6.104.1.

62271-100 Amend. 2  IEC:2006 – 35 –
Page 237
6.108.2 Test current and recovery voltage
Replace the second paragraph of 6.108.2 by the following:
The d.c. component of the breaking current shall not exceed 20 % of the a.c. component. The
transient recovery voltage shall meet the requirements of items a) and b) of 6.104.5.1.
Standard values are derived from u , t , u and t of Tables 24, 25, 1b and 1c. The values to
1 1 c 3
be used for single-phase and double earth fault tests are given in Table 16 marked by the
index ( ):
sp
Page 239
6.109 Short-line fault tests
6.109.1 Applicability
Replace the text of 6.109.1 by the following:
Short-line fault tests are short-circuit tests additional to the basic short-circuit test-duties
covered by 6.106. These tests shall be made to determine the ability of a circuit-breaker to
break short-circuit currents under short-line fault conditions characterised by a transient
recovery voltage as a combination of the source and the line side components.
Short-line fault tests are applicable only to class S2 circuit-breakers designed for direct
connection to overhead lines, irrespective of the type of network on the source side, having a
rated voltage of 15 kV and above and a rated short-circuit breaking current exceeding 12,5 kA.

6.109.2 Test current
Replace the text of 6.109.2 by the following:
The test current shall take into account the source and line side impedances. The source side
impedance shall be that corresponding to approximately 100 % rated short-circuit breaking
current I and the phase-to-earth value of the rated voltage U .
sc r
Standard values of the line side impedance are specified corresponding to a reduction of the
a.c. component of the rated short-circuit breaking current to:
– 90 % (L ) and 75 % (L ) for circuit-breakers with a rated voltage equal to or higher than
90 75
48,3 kV,
– 75 % (L ) for circuit-breakers with a rated voltage 15 kV and above and less than
48,3 kV.
In a test, the line length represented on the line side of a circuit-breaker may differ from the
length of the line corresponding to currents equal to 90 % and 75 % of the rated short-circuit
breaking current.
62271-100 Amend. 2  IEC:2006 – 37 –
For rated voltages equal or higher than 48,3 kV, tolerances on these standardised lengths are
–20 % and 0 % for tests at 90 % of the rated short-circuit breaking current and ±20 % for
tests at 75 % of the rated short-circuit breaking current.
For rated voltages equal and higher than 15 kV and less than 48,3 kV, tolerances on these
standardised lengths are 0 % and –20 % for tests at 75 % of the rated short-circuit breaking
current.
These tolerances for the line lengths give the following deviations of the short-circuit currents:
− L at 0 % deviation: I = 90 % of I ;
90 L sc
− L at –20 % deviation: I = 92 % of I ;
90 L sc
− L at +20 % deviation: I = 71 % of I ;
75 L sc
− L at 0 % deviation: I = 75 % of I ;
75 L sc
– L at –20 % deviation: I = 79 % of I .
75 L sc
For the case stated in 6.109.4, item c) another test (L ) at 60 % of the rated short-circuit
breaking current is required. The tolerance on the corresponding standardised line length is
±20 %. This results in the following deviations of the short-circuit current:
L at +20 % deviation: I = 55 % of I ;
−
60 L sc
L at –20 % deviation: I = 65 % of I .
−
60 L sc
For further information see Annex J and Clause L.3.

Page 245
6.109.4 Test-duties
Replace the text of 6.109.4 by the following:
The short-line fault tests shall be single-phase tests. The series of test-duties is specified
below. Each test-duty consists of the rated operating sequence. For convenience of testing,
the closing operations may be performed as no-load operations.
The test circuit shall be in accordance with 6.109.3.
For these test-duties, the percentage d.c. component at the instant of contact separation shall
be less than 20 % of the a.c. component.
The test-duties related to test currents according to 6.109.2 are as follows:
a) Test-duty L
At the current for L given in 6.109.2 and the appropriate prospective transient recovery
voltage.
This test duty is only mandatory for circuit-breakers with a rated voltage equal to or higher
than 48,3 kV.
62271-100 Amend. 2  IEC:2006 – 39 –
b) Test-duty L
At the current for L given in 6.109.2 and the appropriate prospective transient recovery
voltage.
c) Test-duty L
At the current for L given in 6.109.2 and the appropriate prospective transient recovery
voltage.
This test-duty is mandatory only for circuit-breakers with a rated voltage equal to or higher
than 48,3 kV and only if the minimum arcing time obtained during test-duty L is a quarter
of a cycle or more longer than the minimum arcing time determined during test-duty L .
Page 275
6.111.10 Tests with specified TRV
Replace Table 20 by the following:
Table 20 – Specified values of u , t , u , and t
1 1 c 2
Test-duties Recovery
...