SIST EN IEC 62271-112:2021
(Main)High-voltage switchgear and controlgear - Part 112: Alternating current high-speed earthing switches for secondary arc extinction on transmission lines (IEC 62271-112:2021)
High-voltage switchgear and controlgear - Part 112: Alternating current high-speed earthing switches for secondary arc extinction on transmission lines (IEC 62271-112:2021)
This part of IEC 62271 applies to AC high-speed earthing switches (hereafter termed HSES) designed for indoor and outdoor installation and for operation at service frequencies of 50 Hz and 60 Hz on systems having voltages of 550 kV and above.
HSESs described in this document are intended to extinguish the secondary arc remaining after clearing faults on transmission lines by the circuit-breakers.
For more detailed information on HSESs, refer to Annex A.
Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil 112: Schnellschaltende Wechselstrom-Erdungsschalter zum Löschen von sekundären Lichtbögen auf Freileitungen (IEC 62271-112:2021)
Appareillage à haute tension - Partie 112: Sectionneurs de terre rapides à courant alternatif pour l'extinction de l'arc secondaire sur les lignes de transport (IEC 62271-112:2021)
IEC 62271-112:2021 est disponible sous forme de IEC 62271-112:2021 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L’IEC 62271-112:2021 s’applique aux sectionneurs de terre rapides à courant alternatif (nommés ci-après HSES) conçus pour les installations intérieures et extérieures et pour fonctionner à des fréquences de 50 Hz et 60 Hz sur des réseaux de tensions assignées supérieures ou égales à 550 kV. Les HSES décrits dans le présent document sont destinés à supprimer l’arc secondaire demeurant après l’élimination des défauts sur les lignes de transport par les disjoncteurs. Pour de plus amples informations sur les HSES, voir l’Annexe A. Cette deuxième édition annule et remplace la première édition parue en 2013. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente: Le document a été mis à jour par rapport à la deuxième édition de l’IEC 62271-1:2017.
Visokonapetostne stikalne in krmilne naprave - 112. del: Hitra ozemljitvena stikala na izmenični tok za ugašanje sekundarnega obloka na prenosnih vodih (IEC 62271-112:2021)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN IEC 62271-112:2021
01-november-2021
Nadomešča:
SIST EN 62271-112:2014
Visokonapetostne stikalne in krmilne naprave - 112. del: Hitra ozemljitvena stikala
na izmenični tok za ugašanje sekundarnega obloka na prenosnih vodih (IEC 62271
-112:2021)
High-voltage switchgear and controlgear - Part 112: Alternating current high-speed
earthing switches for secondary arc extinction on transmission lines (IEC 62271-
112:2021)
Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil 112: Schnellschaltende
Wechselstrom-Erdungsschalter zum Löschen von sekundären Lichtbögen auf
Freileitungen (IEC 62271-112:2021)
Appareillage à haute tension - Partie 112: Sectionneurs de terre rapides à courant
alternatif pour l'extinction de l'arc secondaire sur les lignes de transport (IEC 62271-
112:2021)
Ta slovenski standard je istoveten z: EN IEC 62271-112:2021
ICS:
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
SIST EN IEC 62271-112:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN IEC 62271-112:2021
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SIST EN IEC 62271-112:2021
EUROPEAN STANDARD EN IEC 62271-112
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2021
ICS 29.130.10; 29.130.99 Supersedes EN 62271-112:2013 and all of its
amendments and corrigenda (if any)
English Version
High-voltage switchgear and controlgear - Part 112: Alternating
current high-speed earthing switches for secondary arc
extinction on transmission lines
(IEC 62271-112:2021)
Appareillage à haute tension - Partie 112: Sectionneurs de Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil
terre rapides à courant alternatif pour l'extinction de l'arc 112: Schnellschaltende Wechselstrom-Erdungsschalter
secondaire sur les lignes de transport zum Löschen von sekundären Lichtbögen auf Freileitungen
(IEC 62271-112:2021) (IEC 62271-112:2021)
This European Standard was approved by CENELEC on 2021-08-17. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard 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 European Standard 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, 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
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62271-112:2021 E
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SIST EN IEC 62271-112:2021
EN IEC 62271-112:2021 (E)
European foreword
The text of document 17A/1311/FDIS, future edition 2 of IEC 62271-112, prepared by SC 17A
“Switching devices” of IEC/TC 17 “High-voltage switchgear and controlgear” was submitted to the IEC-
CENELEC parallel vote and approved by CENELEC as EN IEC 62271-112:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022–05–17
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024–08–17
document have to be withdrawn
This document supersedes EN 62271-112:2013 and all of its amendments and corrigenda (if any).
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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62271-112:2021 was approved by CENELEC as a
European Standard without any modification.
2
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SIST EN IEC 62271-112:2021
EN IEC 62271-112:2021 (E)
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 60050-441 1984 International Electrotechnical Vocabulary - -
(IEV) - Part 441: Switchgear, controlgear
and fuses
+ A1 2000 - -
IEC 62271-1 2017 High-voltage switchgear and controlgear - EN 62271-1 2017
Part 1: Common specifications for
alternating current switchgear and
controlgear
IEC 62271-100 2021 High-voltage switchgear and controlgear - - -
Part 100: Alternating-current circuit-
breakers
IEC 62271-102 2018 High-voltage switchgear and controlgear - EN IEC 62271-102 2018
Part 102: Alternating current disconnectors
and earthing switches
IEC 62271-200 2011 High-voltage switchgear and controlgear - EN 62271-200 2012
Part 200: AC metal-enclosed switchgear
and controlgear for rated voltages above
1 kV and up to and including 52 kV
3
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SIST EN IEC 62271-112:2021
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SIST EN IEC 62271-112:2021
IEC 62271-112
®
Edition 2.0 2021-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-voltage switchgear and controlgear –
Part 112: Alternating current high-speed earthing switches for secondary arc
extinction on transmission lines
Appareillage à haute tension –
Partie 112: Sectionneurs de terre rapides à courant alternatif pour l’extinction de
l’arc secondaire sur les lignes de transport
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.10; 29.130.99 ISBN 978-2-8322-1001-6
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 IEC 62271-112:2021
– 2 – IEC 62271-112:2021 IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Normal and special service conditions . 8
5 Ratings . 8
6 Design and construction . 10
7 Type tests . 12
8 Routine tests . 15
9 Guide to the selection of HSESs (informative) . 15
10 Information to be given with enquiries, tenders and orders (informative) . 15
11 Transport, storage, installation, operating instructions and maintenance. 15
12 Safety . 16
Annex A (informative) Background information on the use of HSESs . 17
Annex B (informative) Induced current and voltage conditions for other cases . 22
Bibliography . 27
Figure 1 – Explanation of a multi-phase auto-reclosing scheme . 7
Figure 2 – Timing chart of HSES and circuit-breakers . 10
Figure A.1 – Single-line diagram of a power system . 18
Figure A.2 – Timing chart of the HSESs in relation to the transmission line circuit-
breakers . 18
Figure A.3 – Typical timing chart showing the time between fault initiation and a
successful re-close of the transmission line circuit-breakers . 19
Figure B.1 – System condition to explain successive fault . 23
Figure B.2 – Example of waveforms of delayed current zero phenomena . 23
Figure B.3 – Typical test circuit for electromagnetic coupling test-duty of a HSES with
delayed current zero crossings . 25
Figure B.4 – Typical test circuit for electrostatic coupling test-duty of HSES with
delayed current zero crossings . 25
Table 1 – Nameplate information . 11
Table 2 – Standard values of rated induced currents and voltages . 13
Table A.1 – Comparison of earthing switches . 20
Table A.2 – Comparison of a four-legged reactor and HSES . 21
Table B.1 – Preferred values for single-phase earth fault with delayed current zero
phenomena in the presence of a successive fault . 24
Table B.2 – Preferred values for multi-phase earth faults in a double-circuit system . 26
Table B.3 – Preferred values for covering the cases of categories 0 and 1 . 26
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SIST EN IEC 62271-112:2021
IEC 62271-112:2021 IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 112: Alternating current high-speed earthing switches
for secondary arc extinction on transmission lines
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 62271-112 has been prepared by subcommittee 17A: Switching devices, of IEC technical
committee 17: High-voltage switchgear and controlgear. It is an International Standard.
This second edition cancels and replaces the first edition published in 2013. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
The document has been updated to the second edition of IEC 62271-1:2017.
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SIST EN IEC 62271-112:2021
– 4 – IEC 62271-112:2021 IEC 2021
The text of this International Standard is based on the following documents:
FDIS Report on voting
17A/1311/FDIS 17A/1314/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
This International Standard should be read in conjunction with IEC 62271-1:2017, to which it
refers and which is applicable, unless otherwise specified. In order to simplify the indication of
corresponding requirements, the same numbering of clauses and subclauses is used as in
IEC 62271-1:2017. Amendments to these clauses and subclauses are given under the same
numbering, whilst additional subclauses, are numbered from 101.
A list of all parts in the IEC 62271 series, published under the general title High-voltage
switchgear and controlgear, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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.
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SIST EN IEC 62271-112:2021
IEC 62271-112:2021 IEC 2021 – 5 –
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 112: Alternating current high-speed earthing switches
for secondary arc extinction on transmission lines
1 Scope
This part of IEC 62271 applies to AC high-speed earthing switches (hereinafter termed HSES)
designed for indoor and outdoor installation and for operation at service frequencies of 50 Hz
and 60 Hz on systems having rated voltages of 550 kV and above.
HSESs described in this document are intended to extinguish the secondary arc remaining after
clearing faults on transmission lines by the circuit-breakers.
For more detailed information on HSESs, refer to Annex A.
2 Normative references
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.
IEC 60050-441:1984, International Electrotechnical Vocabulary (IEV) – Part 441: Switchgear,
controlgear and fuses
IEC 60050-441:1984/AMD1:2000
IEC 62271-1:2017, High-voltage switchgear and controlgear – Part 1: Common specifications
for alternating current switchgear and controlgear
IEC 62271-100:2021, High-voltage switchgear and controlgear – Part 100: Alternating current
circuit-breakers
IEC 62271-102:2018, High-voltage switchgear and controlgear – Part 102: Alternating current
disconnectors and earthing switches
IEC 62271-200:2011, High-voltage switchgear and controlgear – Part 200: AC metal-enclosed
switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV
3 Terms and definitions
For the purposes of this document, the terms and definitions given in Clause 3 of
IEC 62271-1:2017, as well as the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
Additional terms and definitions are classified so as to be aligned with the classification used
in IEC 60050-441.
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3.1 General terms and definitions
3.1.101
secondary arc
arc that remains at the faulted point after interruption of the short-circuit current fed by the
network
Note 1 to entry: This secondary arc is supplied by electrostatic or electromagnetic induction from the adjacent live
phases.
3.1.102
single-phase auto-reclosing scheme
auto-reclosing scheme in which a faulted phase circuit is opened and automatically re-closed
independently from the other phases
3.1.103
multi-phase auto-reclosing scheme
auto-reclosing scheme applied to double circuit overhead lines in which all faulted phase circuits
are opened and re-closed independently provided that at least two different phases remain un-
faulted
Note 1 to entry: An example of multi-phase auto-reclosing scheme is indicated in Figure 1.
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SIST EN IEC 62271-112:2021
IEC 62271-112:2021 IEC 2021 – 7 –
Key
1) Up to 4 phases have a fault Closed circuit-breaker
2) Only the faulted phases have been tripped Open circuit-breaker
3) All circuit-breakers at both ends re-closed Re-closed circuit-breaker
Figure 1 – Explanation of a multi-phase auto-reclosing scheme
Note 2 to entry: Other than the scheme described in 3.1.102 and 3.1.103, a three-phase auto-reclosing scheme is
commonly applied. In this scheme, all three phases of one circuit are tripped and re-closed at both ends even if a
fault occurred in one phase. So far high-speed earthing switches are rarely applied with this scheme.
3.1.104
successive fault
additional earth fault that occurs in the adjacent phase circuit(s) during the time interval between
a single-phase earth fault and the opening of the high-speed earthing switch(es)
3.2 Assemblies of switchgear and controlgear
No particular definitions.
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3.3 Parts of assemblies
No particular definitions.
3.4 Switching devices
3.4.101
high-speed earthing switch
HSES
earthing switch that has the capability to:
– make, carry and interrupt the induced current;
– withstand the recovery voltage caused by electromagnetic and/or by electrostatic couplings
prior to circuit re-closure;
– make and carry the rated short-circuit current
Note 1 to entry: The high-speed operation applies normally to both closing and opening.
Note 2 to entry: A high-speed earthing switch is not intended to be used as a maintenance earthing switch.
3.4.102
high-speed earthing switch class M0
high-speed earthing switch having a normal mechanical endurance of 1 000 operation cycles
3.4.103
high-speed earthing switch class M1
high-speed earthing switch having an extended mechanical endurance of 2 000 operation
cycles for special requirements
3.5 Parts of switchgear and controlgear
No particular definitions.
3.6 Operational characteristics of switchgear and controlgear
No particular definitions.
3.7 Characteristics quantities
No particular definitions.
4 Normal and special service conditions
Clause 4 of IEC 62271-1:2017 is applicable.
5 Ratings
5.1 General
Clause 5 of IEC 62271-1:2017 is applicable with the following additions.
NOTE Categories corresponding to the fault modes are explained in Annex B.
5.5 Rated continuous current (I )
r
Subclause 5.5 of IEC 62271-1:2017 is not applicable.
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IEC 62271-112:2021 IEC 2021 – 9 –
5.101 Rated short-circuit making current (I )
ma
Subclause 5.101 of IEC 62271-102:2018 is applicable.
5.102 Rated operating sequence
The rated characteristics of the HSES are referred to the rated operating sequence.
a) C – t – O,
i1
or
b) C – t – O – t – C – t – O
i1 i2 i1
Where
– t is a time that is longer than the time required for secondary arc extinction and for dielectric
i1
recovery of air insulation at the faulted point. t is determined by users considering system
i1
stability. The preferred value of t is 0,15 s;
i1
– t is the intermediate time that is given by the system protection. t includes the closing
i2 i2
time of the circuit-breakers after the HSESs open, the duration of a new line fault and the
break-time of the circuit-breakers. Following this time t , the HSES can be reclosed. The
i2
preferred value of t is 0,5 s.
i2
In this case the HSES shall be able to operate without intentional time delay.
NOTE t and t are set by system control scheme and a HSES itself is to be operated according to its own operating
i1 i2
time.
Figure 2 shows the time chart for the rated operating sequence of C – t – O – t – C – t – O.
i1 i2 i1
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Key
Circuit- Transmission line circuit-breakers that
3 Contact touch of HSESs
breaker interrupt the fault
HSES High-speed earthing switches 4 Energizing of the opening release of the HSESs
1 Energizing of the closing circuit of the 5 Contact separation of HSESs
HSESs
2 Current start in HSESs 6 Arc extinction in HSESs
t , t Times defined in 5.102 7 Fully open position of HSESs
i1 i2
NOTE 1 A common value for the re-closing time of the circuit-breaker is 1 s to guarantee system stability.
NOTE 2 t is normally within the range of 0,15 s to 0,5 s.
i1
NOTE 3 t is normally within the range of 0,5 s to 1 s.
i2
NOTE 4 The operating sequence b) is for system stability requirements to cover cases where another fault occurs
on the same phase.
NOTE 5 The HSES closing time is normally less than 0,2 s.
Figure 2 – Timing chart of HSES and circuit-breakers
6 Design and construction
Clause 6 of IEC 62271-1:2017 is applicable with the following modifications.
6.5 Dependent power operation
Subclause 6.5 of IEC 62271-1:2017 is not applicable.
6.7 Independent unlatched operation (independent manual or power operation)
Subclause 6.7 of IEC 62271-1:2017 is not applicable.
6.11 Nameplates
The designation of the equipment is specified as HSES.
Items to be indicated on the nameplate are listed in Table 1.
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IEC 62271-112:2021 IEC 2021 – 11 –
Table 1 – Nameplate information
Item Abbreviation Unit
Name of manufacturer
Type designation
Serial number
Year of manufacture
Rated voltage U kV
r
Rated lightning impulse withstand voltage U kV
p
Rated switching impulse withstand voltage U kV
s
Rated power-frequency withstand voltage U kV
d
Rated short-time withstand current I kA
k
Rate peak withstand current I kA
p
t
Rated duration of short-circuit s
k
Rated short-circuit making current I kA
ma
Filling pressure for insulation P MPa
re
Filling pressure for operation P MPa
rm
U
Rated supply voltage(s) of auxiliary and control circuits V
a
Specify DC/AC (with rated frequency)
f
Rated frequency Hz
r
Mechanical endurance class M /M
1 2
Electrical endurance class E /E
1 2
Type and mass fluid (liquid or gas) for insulation M kg
f
Mass (including fluid) M kg
Operating sequence C-t -O or
r1
C-t -O-t -C-t -O
r1 r2 r1
(t , t )
r1 r2
Minimum and maximum ambient temperature °C
a
Category (option)
a
Category is to refer to Clause B.2
6.12 Locking devices
Subclause 6.12 of IEC 62271-1:2017 is not applicable.
6.101 Anti-pumping device
Anti-pumping device shall be provided for pneumatic and hydraulic operating mechanism.
6.102 Special requirements for HSES
A HSES shall be able to earth transmission lines and re-open to achieve their full voltage
withstand within the dead time of the auto-reclosing duty cycle of the transmission line circuit-
breakers. The dead time is defined by system stability and is normally set around 1 s enabling
dielectric recovery of insulation capability at the fault location. Fast operating capability for both
making and breaking is required.
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The HSES shall have a capability to by-pass secondary arc current on the transmission lines.
The HSES shall have a capability to break induced current by electromagnetic and/or
electrostatic coupling on transmission lines with a transient recovery voltage specified in
Table 2.
The HSES shall have a capability to withstand recovery voltage after interruption and rated
power frequency voltage to earth (U /√3) in open position.
r
The HSES shall be single-pole operated, unless otherwise specified.
7 Type tests
7.1 General
Clause 7 of IEC 62271-1:2017 is applicable with the following additions.
The dielectric performance shall be verified for phase-to-earth in the open position only in
accordance with IEC 62271-1:2017.
7.3 Radio interference voltage (RIV) test
Subclause 7.3 of IEC 62271-1:2017 is applicable for open position only.
7.5 Continuous current tests
Subclause 7.5 of IEC 62271-1:2017 is not applicable.
7.101 Tests to prove the short-circuit making performance
Subclause 7.101 of IEC 62271-102:2018 is applicable.
7.102 Operating and mechanical endurance tests
Subclause 7.102 of IEC 62271-102:2018 is applicable with the following modifications.
The rated operating sequence shall be verified
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