SIST EN 62271-101:2013/A1:2018

SLOVENSKI STANDARD
SIST EN 62271-101:2013/A1:2018
01-maj-2018
9LVRNRQDSHWRVWQHVWLNDOQHLQNUPLOQHQDSUDYHGHO6LQWHWLþQRSUHVNXãDQMH
'RSROQLOR$,(&$&25
High-voltage switchgear and controlgear - Part 101: Synthetic testing (IEC 62271-
101:2012/A1:2017/COR1:2018)
Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil 101: Synthetische Prüfung (IEC
62271-101:2012/A1:2017/COR1:2018)
Appareillage à haute tension - Partie 101: Essais synthétiques (IEC 62271-
101:2012/A1:2017/COR1:2018)
Ta slovenski standard je istoveten z: EN 62271-101:2013/A1:2018
ICS:
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
SIST EN 62271-101:2013/A1:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 62271-101:2013/A1:2018

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SIST EN 62271-101:2013/A1:2018


EUROPEAN STANDARD EN 62271-101:2013/A1

NORME EUROPÉENNE

EUROPÄISCHE NORM
March 2018
ICS 29.130.10

English Version
High-voltage switchgear and controlgear - Part 101: Synthetic
testing
(IEC 62271-101:2012/A1:2017 + COR1:2018)
Appareillage à haute tension - Partie 101: Essais Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil
synthétiques 101: Synthetische Prüfung
(IEC 62271-101:2012/A1:2017 + COR1:2018) (IEC 62271-101:2012/A1:2017 + COR1:2018)
This amendment A1 modifies the European Standard EN 62271-101:2013; it was approved by CENELEC on 2018-01-04. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.



European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 62271-101:2013/A1:2018 E

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SIST EN 62271-101:2013/A1:2018
EN 62271-101:2013/A1:2018 (E)

European foreword
The text of document 17A/1149/FDIS, future edition 1 of IEC 62271-101:2012/A1 prepared by
IEC/SC 17A: “High-voltage switchgear and controlgear”, of IEC/TC 17: “Switchgear and controlgear”
was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN 62271-101:2013/A1:2018.

The following dates are fixed:
(dop) 2018-10-04
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-01-04
standards conflicting with the
document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 62271-101:2012/A1:2017+ COR1:2018 was approved by
CENELEC as a European Standard without any modification.
2

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SIST EN 62271-101:2013/A1:2018
EN 62271-101:2013/A1:2018 (E)

Replace Annex ZA by the following:
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.

NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.

Publication Year Title EN/HD Year

IEC 62271-100 2008 High-voltage switchgear and controlgear - EN 62271-100 2009
+ A1 2012 Part 100: Alternating current circuit-breakers + A1 2012
+ A2 2017 + A2 2017


3

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SIST EN 62271-101:2013/A1:2018

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SIST EN 62271-101:2013/A1:2018




IEC 62271-101

®


Edition 2.0 2017-11




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside



A MENDMENT 1

AM ENDEMENT 1





High-voltage switchgear and controlgear –

Part 101: Synthetic testing




Appareillage à haute tension –

Partie 101: Essais synthétiques
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.130.10 ISBN 978-2-8322-4811-9



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 62271-101:2013/A1:2018
– 2 – IEC 62271-101:2012/AMD1:2017
© 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/1149/FDIS 17A/1154/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 website 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 test procedure for test-duty T100a has been aligned with IEC 62271-100;
– Annexes A through D have been transferred to IEC 62271-306;
– Annex I has been revised and now includes Annex P of IEC 62271-100;
– Annexes K, L and N have been revised.

_____________

2 Normative references
Replace the existing reference to IEC 62271-100:2008 by the following new reference:
IEC 62271-100:2008, High-voltage switchgear and controlgear – Part 100: Alternating current
circuit-breakers

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SIST EN 62271-101:2013/A1:2018
IEC 62271-101:2012/AMD1:2017 – 3 –
© IEC 2017
IEC 62271-100:2008/AMD 1:2012
IEC 62271-100:2008/AMD 2:2017
3.17
minimum clearing time
Replace the entire term, definition, note and source as follows:
3.17
(void)
Add, after the definition 3.18, a new term and definition as follows:
3.19
intermediate asymmetry
level of asymmetry in the other two phases having a reduced (intermediate) level of
asymmetry when in a three-phase system the short-circuit current is initiated simultaneously
in all phases and maximum asymmetry is obtained in one of the phases
4.1.2 High-current interval
Replace the entire subclause by the following:
The tolerance on the amplitude and the power frequency of the prospective breaking current
is given in 6.103.2 and 6.104.3 of IEC 62271-100:2008. Therefore, the following conditions
concerning the actual current through the test circuit-breaker shall be met:
– for symmetrical testing the current amplitude and final loop duration shall not be less than
90 % of the required values based on the current of the test-duty considered;
– for SLF test-duties and T100s and T100a when tested with ITRV, the product of the
current amplitude and the duration of the final loop shall not be less than 95 % of the
required values based on the current of the test-duty considered;
– for asymmetrical testing, both the current amplitude and final loop duration shall be
between 90 % and 110 % of the required values, based on the current of the test-duty
considered and time constant (see Tables L.12 to L.17).
In rare cases, where the applied voltage from the high current source is of the same
magnitude as the required test voltage in a direct test circuit, a higher deviation of the last
current loop is accepted provided that the prospective current loop with the auxiliary circuit-
breaker arcing is within the specified tolerances.
4.1.4 High-voltage interval
Replace the first sentence of the first hyphen by the following:
The initial value of the power-frequency recovery voltage, excluding the transient oscillations,
shall not be less than the equivalent initial value of the power-frequency recovery voltage
specified in 6.104.7 of IEC 62271-100:2008 which, for a test with symmetrical current, starts
with a minimum peak value of 0,95×k ×U √(2/3).
pp r
4.2.1 Current injection methods
Replace, in the first sentence, "(see Annex B)" by "(see IEC 62271-306)".
Add, after the second indent, the following new sentences:
Current injection method is mandatory for:
– short-line fault test duties;

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SIST EN 62271-101:2013/A1:2018
– 4 – IEC 62271-101:2012/AMD1:2017
© IEC 2017
– T100s and T100a when tested with ITRV.
The time during which the arc is fed only by the injected current shall be treated as part of the
length of the final current loop.
Replace the paragraph below the second hyphen by the following:
If any device with breaking capability interrupts the current through the test circuit-breaker at
the same time as the test circuit-breaker, the method is not a valid current injection method.
Replace, in item c), "(see Annex B)" by "(see IEC 62271-306)".
4.2.2 Voltage injection method
Replace, in the first sentence, "(see also Annex C)" by "(see IEC 62271-306)".
Delete the sentence below the third hyphen of the first list.
4.2.3 Duplicate circuit method (transformer or Skeats circuit)
Replace, in the first sentence, "(see also Annex D)" by "(see IEC 62271-306)".
Delete the penultimate paragraph.
Replace, in the last paragraph, "See Annex D" by "See IEC 62271-306".
4.2.4 Other synthetic test methods
Remove the last two paragraphs.
Table 3 – Test parameters during three-phase interruption for test-duties T10, T30, T60
and T100s, k = 1,3
pp
Replace "98" by "97" (3 instances).
5.2.2 Test circuit
Replace the second sentence of the first paragraph by the following:
Examples of circuits showing voltage and current wave shapes are given in Figures 5 and 6
for single-phase and Figure 7 for three-phase.
6 Specific requirements for synthetic tests for making and breaking
performance related to the requirements of 6.102 through 6.111 of
IEC 62271-100:2008
Replace the existing title by the following new title:
6 Type tests
Add, before the existing text of this clause, the following new title:
6.1 General
Replace the second paragraph by the following new paragraphs and new table:

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SIST EN 62271-101:2013/A1:2018
IEC 62271-101:2012/AMD1:2017 – 5 –
© IEC 2017
Requirements concerning testing of metal enclosed and dead tank circuit-breakers are given
in Annex N.
General requirements for circuit-breakers with opening resistors are given in Annex R of
IEC 62271-100:2008/AMD1:2012. A method available for testing circuit-breakers having
opening resistors is reported in Annex F.
The abbreviations given in Table 6 are used to specify the operations to be performed.
Table 6 – Abbreviations used for operation during synthetic tests
Cd Closing operation in a direct circuit at the voltage of the current source which can be less than the
voltage specified in 6.104.1 of IEC 62271-100:2008
(Cd) Closing operation as Cd, which may be carried out under no-load conditions
Cd Closing operation against the rated short-circuit making current according to 6.104.2 of
asy
IEC 62271-100:2008/AMD2:2017 in a direct circuit at conditions described under Cd
Cs Closing operation against a symmetrical current equal to the rated short-circuit breaking current,
sym
carried out at the required applied voltage in a synthetic circuit
Od Breaking operation at the voltage of the current source only and with the specified breaking current
Os Breaking operation with specified parameters in a synthetic circuit
t Time interval between operations (0,3 s or 3 min depending on the rated operating sequence)
t' Time interval between operations (3 min)
t" Time interval between operations (15 s)
SP Single-phase test as defined in 6.108 of IEC 62271-100:2008/AMD2:2017
DEF Double-earth fault test as defined in 6.108 of IEC 62271-100:2008/AMD2:2017
NOTE Due to the characteristics of synthetic testing it may be difficult to comply with the specified time intervals
of the rated operating sequence. See 6.105.1 of IEC 62271-100:2008/AMD1:2008.

In order to comply with all test requirements, it may be necessary to make more operations
than specified in the normal test-duty. In such cases the circuit-breaker may be reconditioned
and the test duty repeated.
6.102.10 Demonstration of arcing times
Replace the subclause by the following:
6.102.10 Demonstration of arcing times
6.102.10.1 General
The basic requirements to be met are given in 6.102.10 of IEC 62271-100:2008/AMD2:2017.
In order to be able to perform synthetic tests on the same basis as direct tests, normally it will
be necessary to apply special re-ignition methods to prolong the arcing of the test circuit-
breaker through the necessary number of zeros of the power-frequency current. See Annex H
for re-ignition methods to prolong arcing.
The "step-by-step" method described in Annex H is the method used on most synthetic tests.
The method is considered to be a sufficiently close approximation of the direct testing
procedure.
The arcing is prolonged by means of thermal re-ignitions. As this method makes it possible to
force the test circuit-breaker to re-ignite in all conditions, special care shall be taken not to re-
ignite the circuit-breaker at the instant of a current zero when the circuit-breaker can clear.
For this purpose it is necessary to determine, for each terminal fault, short-line fault and out-

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SIST EN 62271-101:2013/A1:2018
– 6 – IEC 62271-101:2012/AMD1:2017
© IEC 2017
of-phase test duty, the minimum arcing time of the circuit-breaker. At least two breaking tests,
one clearance and one re-ignition, are necessary for this determination.
The clearance at the minimum arcing time is the first valid breaking operation. The other test
is performed to demonstrate that a re-ignition at an early current zero would take place
between the arcing contacts. This re-ignition test shall not be the last in a test duty.
For Od operations, a tolerance of ±2 ms on the arcing time applies.
The extra tests necessary to demonstrate correct behaviour at early current zeros will usually
contribute insignificantly to contact wear, etc., due to the short arcing times. Therefore, no re-
conditioning should be necessary because of these tests.
The re-ignition(s) obtained when determining the minimum arcing time do(es) not indicate a
failure of the circuit-breaker. However, it is important to establish that this re-ignition has
taken place between the arcing contacts only. When using a current injection method, the
interruption of the injected current a few loops after the re-ignition is often a useful means for
the judgement. Thorough inspection of screens, arcing and main contacts, etc., should also
be made to verify correct behaviour.
NOTE When performing Od-COs, or COd-COs operations the first opening operation is performed in a direct test
circuit. This first opening operation should represent the minimum arcing time found for single opening operations.
In case the arcing time of this first opening operation is longer than required, the test is considered as more severe.
The minimum clearing time for test-duty T100a is validated by the minimum arcing time of an
interruption after a major loop with intermediate asymmetry.
6.102.10.2 Three-phase tests
Depending on the test circuit used, the test procedures given here may not cover the
rd
conditions of the 3 pole-to-clear for solidly earthed systems (k = 1,3). For this case the
pp
same procedures may be applied, with the manufacturer’s consent, by combining the TRV and
nd rd
di/dt parameters for the 2 pole-to-clear and the arcing time corresponding to the 3 pole-to-
clear. Alternatively, an additional test may be performed with the TRV, di/dt and the maximum
rd
arcing time corresponding to the 3 pole-to-clear.
For alternative testing procedures of multi-enclosure type circuit-breakers with operating
mechanism characteristics that require three-phase current, see Annex K.
6.102.10.2.1 Test duties T10, T30, T60, T100s, T100s(b)
The test procedure is as follows:
For convenience of testing, the pole in phase A is kept as the first-pole-to-clear.
First the minimum arcing time and correct re-ignition behaviour are established. This is done
by changing the setting of the tripping impulse in steps of 18° (possibly this has to be
repeated several times). After having done so, the setting of the control of the tripping impulse
has to be advanced by approximately 40°, starting from the shortest arcing time at which the
circuit-breaker cleared. For the last test, the setting of the control of the tripping impulse has
to be advanced by approximately 20°, starting from the shortest arcing time at which the
circuit-breaker cleared:
– first valid breaking operation: t , minimum arcing time in phase A;
arc min
– re-ignition test: t = t − 18°, re-ignition in phase A;
arc reig arc min
– second valid breaking operation: t = t + 40°, longest arcing time in phase A;
arc max arc min
– third valid breaking operation: t = t + 20°, medium arcing time in phase A.
arc med arc min

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SIST EN 62271-101:2013/A1:2018
IEC 62271-101:2012/AMD1:2017 – 7 –
© IEC 2017
The first valid breaking operation and re-ignition test consist of single opening operations. The
second and third valid breaking operations are carried out as part of the rated operating
sequence. If the rated operating sequence is CO-15s-CO, the third valid breaking operation is
not required (see 6.102.10 of IEC 62271-100:2008/AMD2:2017).
For comparison with the arcing time settings used in three-phase direct tests, see Figure 8.
6.102.10.2.2 Test duty T100a
The intention is to demonstrate in a series of breaking tests the requirement a) and b) as
defined in clause 6.102.10.2.2 of IEC 62271-100:2008/AMD2:2017:
– condition a) where arc extinction occurs in the first-pole-to-clear at the end of a major loop
in the first phase with the required asymmetry criteria and with the longest possible arcing
time t ;
arc1
– condition b) where arc extinction occurs at the end of an extended major loop in the last-
pole-to-clear or in the second-pole-to-clear with the required asymmetry criteria and with
the longest possible arcing time, t and t as follows:
arc2 arc3
• the longest possible arcing time t applies for the last-pole-to-clear for circuit-
arc2
breakers rated for k = 1,5;
pp
• the longest possible arcing time t applies for the second-pole-to-clear for circuit-
arc3
breakers rated for k = 1,3 or 1,2.
pp
The test procedure, for three-phase testing, is as follows:
In order to simplify the test procedure, the pole in phase A is kept as the first-pole-to-clear. As
a consequence the pole in phase C will be subjected to increased electrical wear. In order to
obtain similar electrical wear on the poles of phase B and C, the test can be performed by
exchanging the poles of phases B and C for the second breaking operation.
First the minimum arcing time t (Figures 9 and 10, first test) and re-ignition behaviour
arc min
(Figures 9 and 10, second test) shall be demonstrated having intermediate asymmetry in
phase A (Tables L.12 to L.17, columns 7, 8 and 9) and with the major extended loop occurring
in phase C. This is done by changing the setting of the tripping impulse in steps of dα = 18°
(possibly this has to be repeated several times).
Before the next operation, initiation of short-circuit current shall be advanced by 60° where
the required asymmetry changes to phase A (Figures 9 and 10 third test). Arc extinction shall
occur in phase A, the first-pole-to-clear at the end of a major loop with the required
asymmetry criteria and with the maximum arcing time demonstrating condition a) mentioned
above.
The maximum arcing time t for the first pole-to-clear is achieved when the following
arc1
condition is met:
t = t + ∆t – T × dα/360°
arc1 arc min a1
In the next operation, the initiation of short-circuit current shall be delayed by 60°. As a result
the required asymmetry changes to phase C. Arc extinction shall occur in phase C at the end
of a major extended loop with the required asymmetry criteria and with the maximum arcing
time demonstrating condition b) mentioned above:
– the maximum arcing time t for the last-pole-to-clear for circuit-breakers intended to be
arc2
used in non-effectively earthed neutral systems (Figure 9 fourth test) is achieved when the
following condition is met:
t = t + ∆t – T × dα/360°
arc2 arc min a2

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SIST EN 62271-101:2013/A1:2018
– 8 – IEC 62271-101:2012/AMD1:2017
© IEC 2017
– the maximum arcing time t for the second-pole-to-clear for circuit-breakers intended to
arc3
be used in effectively earthed neutral systems (Figure 10 fourth test) is achieved when the
following condition is met:
t = t + ∆t – T × dα/360°
arc3 arc min a3
where ∆t , ∆t , ∆t are the relevant time parameters to be selected from Tables L.12 to
a1 a2 a3
L.17.
The order of the last two breaking operations can be interchanged.
Some circuit-breakers will not clear at the end of a major loop after the required arcing time.
However, this test is valid if the circuit-breaker clears the subsequent minor loop, that
becomes the last-pole-to-clear. The corresponding parameters for the last-pole-to-clear shall
be applied.
For comparison with the arcing settings used in three-phase direct tests, see Figures 9 and 10.
6.102.10.3 Single-phase tests in substitution for three-phase conditions, out-of-phase
and short-line fault tests
6.102.10.3.1 General
The procedures as described in 6.102.10.3 of IEC 62271-100:2008/AMD2:2017 are applicable
with the following changes. These procedures are meant to demonstrate the first-pole-to-clear,
the second-pole-to-clear and the third-pole-to-clear conditions, with current and voltage
parameters applicable for the first-pole-to-clear.
6.102.10.3.3 Test-duty T100a
The test procedure is as follows.
The minimum arcing time t and re-ignition behaviour shall be demonstrated with the
arc min
major loop at intermediate asymmetry (Tables L.12 to L.17, columns 8 and 9). This is done by
changing the setting of the tripping impulse in steps of 18° (possibly this has to be repeated
several times).
After that, two breaking operations at required asymmetry shall be performed as described
below. Tables L.12 to L.17, columns 3 and 4, give the required values of the peak short-circuit
current and loop duration that shall be attained in the last loop prior to the interruption.
One breaking operation, corresponding to condition a) of 6.102.10.2.2 of
IEC 62271-100:2008/AMD2:2017, shall demonstrate interruption at the end of the major loop
with an arcing time equivalent to the maximum arcing time under three-phase conditions t
arc1
of the first-pole-to-clear.
The maximum arcing time t for the first pole-to-clear is achieved when the following
arc1
condition is met:
t = t + ∆t – T × dα/360°
arc1 arc min a1
Another breaking operation, corresponding to condition b) of 6.102.10.2.2 of
IEC 62271-100:2008/AMD2:2017, shall demonstrate interruption at the end of the major loop
with an arcing time equivalent to the maximum arcing time under three-phase conditions:
– the maximum arcing time t for the last-pole-to-clear for circuit-breakers intended to be
arc2
used in non-effectively earthed neutral systems (k = 1,5) is achieved when the following
pp
condition is met:

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SIST EN 62271-101:2013/A1:2018
IEC 62271-101:2012/AMD1:2017 – 9 –
© IEC 2017
= t + ∆t – T × dα/360°
t
arc2 arc min a2
– the maximum arcing time t for the second-pole-to-clear for circuit-breakers intended to
arc3
= 1,3 or k = 1,2) is achieved when the
be used in effectively earthed neutral systems (k
pp pp
following condition is met:
t = t + ∆t – T × dα/360°
arc3 arc min a3
where ∆t , ∆t , ∆t are the relevant time parameters to be selected from Tables L.12 to
a1 a2 a3
L.17.
The order of the last two breaking operations may be interchanged.
Since some circuit-breakers will not clear after a major loop, a test is still valid if the circuit-
breaker interrupts at the subsequent minor loop.
6.102.10.3.5 Splitting of test-duties in test series, taking into account the associated
TRV for each pole-to-clear
The procedures as described in 6.102.10.3.5 of IEC 62271-100:2008/AMD2:2017 are
applicable and the test procedure for synthetic testing is given in Annex L.
6.102.10.3.101 Modified procedure in cases where the circuit-breaker did not interrupt
during a test with a medium arcing time, during breaking tests with
symmetrical current
If the circuit-breaker did not interrupt at the expected current zero during a breaking operation
with symmetrical current with a medium arcing time then it is necessary to perform an
additional breaking operation.
The breaking operation shall demonstrate interruption with the "ultimate maximum arcing time”
t which is:
arc ult max
t = t + T × (150 / 360), if k = 1,5
arc ult max arc med pp
t = t + T × (180 / 360), if k = 1,3, 1,2 or 1,0
arc ult max arc med pp
where
t is the medium arcing time at which the circuit-breaker did not interrupt;
arc med
is the ultimate maximum arcing time.
t
arc ult max
If the circuit-breaker does not interrupt during this additional breaking operation, it is
permissible to carry out maintenance work on the circuit-breaker according to 6.102.9.5 of
IEC 62271-100:2008/AMD2:2017 and repeat the test-duty where the breaking operation with
the medium arcing time is replaced by the breaking operation with the ultimate maximum
arcing time.
For test duties T10, T30, T60, L , L and L , the t is demonstrated with (Cd)Os.
90 75 60 arc ult max
For test duty T100s, the t is demonstrated with CdOs.
arc ult max
For OP1 and OP2 test duties, the t is demonstrated with Os.
arc ult max
6.106 Basic short-circuit test-duties
Delete the second paragraph and the list of abbreviations.

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SIST EN 62271-101:2013/A1:2018
– 10 – IEC 62271-101:2012/AMD1:2017
© IEC 2017
6.106.5 Test-duty T100a
Replace the second paragraph of item a) by the following:
Required values of the peak short-circuit current and loop duration shall be in accordance
with the values in Tables L.12 to L.17.
Delete the fourth paragraph from item a) starting with "The required asymmetry level".
Replace the third paragraph of item b) by the following:
The corresponding corrected values can be found in Tables L.12 to L.17.
Replace the last sentence of 1) of item c) by the following:
See Annex I for more guidance.
Replace the last paragraph of 2) of item c) by the following:
Different test circuits for different asymmetry conditions may be needed in order to obtain the
required values. A test with one single test circuit may over-stress the circuit-breaker and
requires the consent of the manufacturer.
Add the following paragraph to item c):
3) u and RRRV for second-pole-to-clear and last-pole-to-clear are obtained from the
c
respective values for symmetrical
...