EN 62271-104:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil 104: Hochspannungs-Lastschalter für Bemessungsspannungen ab 52 kV und darüber (IEC 62271-104:2009)Appareillages à haute tension - Partie 104: Interrupteurs à courant alternatif pour tensions assignées égales ou supérieures à 52 kV (CEI 62271-104:2009)High-voltage switchgear and controlgear - Part 104: Alternating current switches for rated voltages of 52 kV and above (IEC 62271-104:2009)29.130.10Visokonapetostne stikalne in krmilne napraveHigh voltage switchgear and controlgearICS:Ta slovenski standard je istoveten z:EN 62271-104:2009SIST EN 62271-104:2009en,fr01-oktober-2009SIST EN 62271-104:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD EN 62271-104 NORME EUROPÉENNE
EUROPÄISCHE NORM July 2009
CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: Avenue Marnix 17, B - 1000 Brussels
© 2009 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62271-104:2009 E
ICS 29.130.10; 29.130.99 Supersedes EN 60265-2:1993 + A1:1995 + A2:1998
English version
High-voltage switchgear and controlgear -
Part 104: Alternating current switches
for rated voltages of 52 kV and above (IEC 62271-104:2009)
Appareillage à haute tension -
Partie 104: Interrupteurs à courant alternatif pour tensions assignées
égales ou supérieures à 52 kV (CEI 62271-104:2009)
Hochspannungs-Schaltgeräte
und -Schaltanlagen -
Teil 104: Wechselstrom-Lastschalter
für Bemessungsspannungen über 52 kV (IEC 62271-104:2009)
This European Standard was approved by CENELEC on 2009-06-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, 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.
at national level by publication of an identical
national standard or by endorsement
(dop) 2010-03-01 – latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow) 2012-06-01 Annex ZA has been added by CENELEC. __________ Endorsement notice The text of the International Standard IEC 62271-104:2009 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated: IEC 60137 NOTE
Harmonized as EN 60137:2008 (not modified). __________ SIST EN 62271-104:2009

– 3 – EN 62271-104:2009
Annex ZA
(normative)
Normative references to international publications with their corresponding European publications
The following referenced documents are indispensable for the application 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
When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
Publication Year Title EN/HD Year
IEC 60050-441 1984 International Electrotechnical Vocabulary (IEV) -
Chapter 441: Switchgear, controlgear and fuses - -
IEC 60059 - 1) IEC standard current ratings EN 60059 1999 2)
IEC 60071 Series Insulation co-ordination
EN 60071 Series
IEC 60071-1 - 1) Insulation co-ordination -
Part 1: Definitions, principles and rules EN 60071-1 2006 2)
IEC 60270
- 1) High-voltage test techniques - Partial discharge measurements EN 60270 2001 2)
IEC 62271-1 2007 High-voltage switchgear and controlgear - Part 1: Common specifications EN 62271-1 2008
IEC 62271-100 - 1) High-voltage switchgear and controlgear - Part 100: Alternating current circuit-breakers EN 62271-100 2009 2)
IEC 62271-101 - 1) High-voltage switchgear and controlgear - Part 101: Synthetic testing EN 62271-101 2006 2)
IEC 62271-102 + corr. April
+ corr. May
2001 2002 2003 High-voltage switchgear and controlgear - Part 102: Alternating current disconnectors and earthing switches
EN 62271-102 + corr. March
2002 2005
IEC 62271-110 2005 High-voltage switchgear and controlgear - Part 110: Inductive load switching EN 62271-110 2005
1) Undated reference.
2) Valid edition at date of issue.
IEC 62271-104Edition 1.0 2009-04INTERNATIONAL STANDARD NORME INTERNATIONALEHigh-voltage switchgear and controlgear –
Part 104: Alternating current switches for rated voltages of 52 kV and above
Appareillage à haute tension –
Partie 104: Interrupteurs à courant alternatif pour tensions assignées égales ou supérieures à 52 kV
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XICS 29.130.10; 29.130.99 PRICE CODECODE PRIXISBN 2-8318-1037-9
– 2 – 62271-104 © IEC:2009 CONTENTS FOREWORD.5 1 General.7 1.1 Scope.7 1.2 Normative references.8 2 Normal and special service conditions.8 3 Terms and definitions.8 3.1 General terms.8 3.2 Assemblies.8 3.3 Parts of assemblies.8 3.4 Switching devices.9 3.5 Parts of switches.10 3.6 Operation.10 3.7 Characteristic quantities.10 4 Ratings.12 4.1 Rated voltage (Ur).12 4.2 Rated insulation level.12 4.3 Rated frequency (fr).12 4.4 Rated normal current and temperature rise (Ir).12 4.5 Rated short-time withstand current (Ik).12 4.6 Rated peak withstand current (Ip).12 4.7 Rated duration of short-circuit (tk).12 4.8 Rated supply voltage of closing and opening devices and of auxiliary and control circuits (Ua).12 4.9 Rated supply frequency of closing and opening devices and of auxiliary circuits.12 4.10 Rated pressure of compressed gas supply for controlled pressure systems.12 4.11 Rated filling levels for insulation and/or operation.12 4.101 Rated earth fault breaking current.13 4.102 Rated short-circuit making current.13 4.103 Rated mainly active load-breaking current.13 4.104 Rated closed-loop breaking current.13 4.105 Rated capacitive switching currents.13 4.106 Inductive load switching.14 4.107 Rated mechanical terminal load.14 4.108 Coordination of rated values for a general-purpose switch.14 4.109 Coordination of rated values for limited-purpose and special-purpose switches.15 5 Design and construction.15 5.1 Requirements for liquids in high-voltage switches.15 5.2 Requirements for gases in high-voltage switches.15 5.3 Earthing of high-voltage switches.15 5.4 Auxiliary equipment.16 5.5 Dependent power operation.16 5.6 Stored energy operation.16 5.7 Independent manual or power operation (independent unlatched operation).16 5.8 Operation of releases.16 SIST EN 62271-104:2009

62271-104 © IEC:2009 – 3 – 5.9 Low- and high-pressure interlocking and monitoring devices.16 5.10 Nameplates.16 5.11 Interlocking devices.17 5.12 Position indication.18 5.13 Degree of protection by enclosures.18 5.14 Creepage distances for outdoor insulators.18 5.15 Gas and vacuum tightness.18 5.16 Liquid tightness.18 5.17 Fire hazard (flammability).18 5.18 Electromagnetic compatibility (EMC).18 5.19 X-ray emission.18 5.20 Corrosion.18 5.101 Closing mechanism.18 5.102 Mechanical strength.18 5.103 Position of the movable contact system and its indicating or signalling device.18 6 Type tests.19 6.1 General.19 6.2 Dielectric tests.20 6.3 Radio interference voltage (r.i.v.) tests.21 6.4 Measurement of the resistance of circuits.21 6.5 Temperature rise tests.21 6.6 Short-time withstand current and peak withstand current tests.21 6.7 Verification of the protection.21 6.8 Tightness tests.21 6.9 Electromagnetic compatibility tests (EMC).21 6.10 Additional tests on auxiliary and control circuits.21 6.11 X-Radiation test procedure for vacuum interrupters.21 6.101 Mechanical operation tests.22 6.102 Miscellaneous provision for making and breaking tests.24 6.103 Test circuits for making and breaking tests.26 6.104 Test quantities.36 6.105 Capacitive current switching tests.39 6.106 Inductive load switching (test duty 5).42 6.107 Tests for general-purpose switches.43 6.108 Tests for limited-purpose switches.44 6.109 Tests for special-purpose switches.44 6.110 Type test reports.44 7 Routine tests.45 7.1 Dielectric tests on main circuit.45 7.2 Tests on auxiliary and control circuits.45 7.3 Measurement of the resistance of the main circuit.45 7.4 Tightness test.45 7.5 Design and visual checks.45 7.101 Mechanical operating tests.45 8 Guide to the selection of high-voltage switches.46 8.1 Selection of rated values.46 SIST EN 62271-104:2009

– 4 – 62271-104 © IEC:2009 8.2 Continuous or temporary overload due to changed service conditions.46 8.101 General.46 8.102 Conditions affecting application.46 8.103 Insulation coordination.46 9 Information to be given with enquiries, tenders and orders.47 9.1 Information with enquiries and orders.47 9.2 Information with tenders.47 10 Transport, storage, installation, operation and maintenance.47 11 Safety.47 12 Influence of the high voltage switch on the environment.47 Bibliography.48
Figure 1 – Single-phase test circuit for mainly active load current switching
for test duties 1 and 3.27 Figure 2 – Single-phase test circuit for transmission line closed loop
and parallel-transformer current switching test, for test duties 2a and 2b.27 Figure 3 – Three-phase test circuit for mainly active load current switching,
for test duties 1 and 3.28 Figure 4 – Supply and load side transient for mainly active load current switching tests (see Table 4).29 Figure 5 – Three-phase test circuit for transmission line closed loop
and parallel-transformer current switching test for test duties 2a and 2b.30 Figure 6 – Illustration of the transient associated with transmission line closed loop current breaking tests (see Table 5).32 Figure 7 – Three-phase test circuit for short circuit making current test for test duty 6.35 Figure 8 – Single-phase test circuit for short circuit making current test for test duty 6.35
Table 1 – Preferred values of line- and cable-charging breaking
currents for a general-purpose switch.15 Table 2 – Nameplate information.17 Table 3 – Type tests.20 Table 4 – Supply circuit TRV parameters for mainly active load current breaking tests.29 Table 5 – TRV parameters for transmission line closed loop current breaking tests.31 Table 6 – Test duties for single-phase tests on three-pole switches having a non-simultaneity between poles of 0,25 cycle or less.32 Table 7 – Test duties for single-phase tests on three-pole switches having more than 0,25 cycle non-simultaneity and switches operated pole after pole.33 Table 8 – TRV parameters for parallel transformer current breaking tests.34 Table 9 – Test duties for three-phase tests on three-pole switches.36
62271-104 © IEC:2009 – 5 – INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 104: Alternating current switches
for rated voltages of 52 kV and above
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 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. International Standard IEC 62271-104 has been prepared by subcommittee 17A: High-voltage switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear. This standard cancels and replaces IEC 60265-2 (1988). The main changes with respect to IEC 60265-2 are as follows: – alignment with IEC 62271-1 and IEC 62271-100; – requirements for capacitive current switching aligned with those in IEC 62271-100: classes C1 and C2 are introduced. SIST EN 62271-104:2009

– 6 – 62271-104 © IEC:2009 The text of this standard is based on the following documents: FDIS Report on voting 17A/857/FDIS 17A/865/RVD
Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. This standard is to be read in conjunction with IEC 62271-1 (2007), IEC 62271-100, IEC 62271-102 (2001) and IEC 62271-110 (2005). In order to simplify the indication of corresponding requirements, the same numbering of clauses and subclauses is used as in IEC 62271-1. Modifications to these clauses and subclauses are given under the same numbering, whilst additional subclauses are numbered from 101. A list of all the parts in the IEC 62271, 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 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.
62271-104 © IEC:2009 – 7 – HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 104: Alternating current switches
for rated voltages of 52 kV and above
1 General 1.1 Scope This part of IEC 62271 is applicable to three-pole alternating current switches for rated voltages 52 kV and above, having making and breaking current ratings, for indoor and outdoor installations, and for rated frequencies up to and including 60 Hz. This standard is also applicable to the operating devices of these switches and to their auxiliary equipment. NOTE 1 Switches for gas insulated switchgear are covered by this standard. NOTE 2 Switches having a disconnecting function and called switch-disconnectors are also covered by IEC 62271-102. NOTE 3 Earthing switches are not covered by this standard. Earthing switches forming an integral part of a switch are covered by IEC 62271-102. The main object of this standard is to establish requirements for switches used in transmission and distribution systems. General-purpose switches for this application are designed to comply with the following service applications: – carrying rated normal current continuously; – carrying short-circuit currents for a specified time; – switching of mainly active loads; – switching of no-load transformers; – switching of the charging current of unloaded cables, overhead lines or busbars; – switching of closed-loop circuits; – making short-circuit currents. A further object of this standard is to establish requirements for limited-purpose and special- purpose switches used in transmission and distribution systems. Limited-purpose switches shall comply with one or more of the service applications indicated above. Special-purpose switches may comply with one or more of the service applications indicated above and, in addition, shall be suitable for one or more of the following applications: – switching single capacitor banks; – switching back-to-back capacitor banks; – switching shunt reactors including secondary or tertiary reactors switched from the primary side of the transformer; – applications requiring an increased number of operating cycles; – switching under earth fault conditions in non-effectively earthed neutral systems. SIST EN 62271-104:2009

– 8 – 62271-104 © IEC:2009 1.2 Normative references The following referenced documents are indispensable for the application 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 – Chapter 441: Switchgear, controlgear and fuses IEC 60059, IEC standard current ratings IEC 60071 (all parts), Insulation co-ordination IEC 60071-1: Insulation co-ordination – Part 1: Definitions, principles and rules IEC 60270, High-voltage test techniques – Partial discharge measurements IEC 62271-1:2007, High-voltage switchgear and controlgear – Part 1: Common specifications IEC 62271-100: High-voltage switchgear and controlgear – Part 100: Alternating-current circuit-breakers IEC 62271-101: High-voltage switchgear and controlgear – Part 101: Synthetic testing IEC 62271-102:2001, High-voltage switchgear and controlgear – Part 102: Alternating current disconnectors and earthing switches IEC 62271-110:2005, High-voltage switchgear and controlgear – Part 110: Inductive load switching 2 Normal and special service conditions Clause 2 of IEC 62271-1 is applicable. 3 Terms and definitions For the purposes of this document, definitions of general terms are based on IEC 60050-441 and IEC 60071-1.
Additional terms and definitions are based solely on
IEC 60050-441. 3.1 General terms No particular definitions. 3.2 Assemblies No particular definitions. 3.3 Parts of assemblies No particular definitions. SIST EN 62271-104:2009

62271-104 © IEC:2009 – 9 – 3.4 Switching devices 3.4.101 switch switching device capable of making, carrying and breaking currents under normal circuit conditions, which may include specified operating overload conditions and also carrying for a specified time currents under specified abnormal circuit conditions, such as those of short- circuit [IEV 441-14-10] 3.4.102 switch-disconnector switch which, in the open position, satisfies the isolating requirements specified for a disconnector [IEV 441-14-12] 3.4.103 general-purpose switch switch capable of performing, with currents up to its rated breaking currents, all making and breaking operations which may normally occur; capable of carrying and making short-circuit currents NOTE Refer to 4.108 for specific ratings of a general-purpose switch. 3.4.104 limited-purpose switch switch which complies with one or more, but not with all, service applications of a general- purpose switch 3.4.105 special-purpose switch switch suitable for switching requirements other than those specified for a general-purpose switch NOTE Examples of such requirements are capacitor bank switching, shunt reactor switching, switching under earth fault conditions, and a capability of an increased number of operating cycles. 3.4.106 class C1 switch special-purpose switch with low probability of restrike during capacitive current breaking as demonstrated by specific type tests 3.4.107 class C2 switch special-purpose switch with very low probability of restrike during capacitive current breaking as demonstrated by specific type tests 3.4.108 single capacitor bank switch special-purpose switch intended for switching of a single capacitor bank with charging currents up to its rated single capacitor bank breaking current 3.4.109 back-to-back capacitor bank switch special-purpose switch intended for breaking capacitor bank-charging currents, with one or more capacitor banks connected to the bus or supply side of the switch, up to its rated back- to-back capacitor bank breaking current. The switch shall be capable of making the associated inrush current, up to its rated capacitor bank inrush making current SIST EN 62271-104:2009

– 10 – 62271-104 © IEC:2009 3.4.110 shunt reactor switch special-purpose switch intended for switching a shunt reactor, including secondary or tertiary reactors switched from the primary side of the transformer 3.5 Parts of switches No particular definitions. 3.6 Operation No particular definitions. 3.7 Characteristic quantities 3.7.101 breaking capacity (of a switching device or a fuse) value of prospective current that a switching device or a fuse is capable of breaking at a stated voltage under prescribed conditions of use and behaviour
NOTE 1 The voltage to be stated and the conditions to be prescribed are dealt with in the relevant publications.
NOTE 2 For switching devices, the breaking capacity may be termed according to the kind of current included in the prescribed conditions, e.g. line-charging breaking capacity, cable charging breaking capacity, single capacitor bank breaking capacity, etc.
[IEV 441-17-08] 3.7.102 mainly active load breaking capacity breaking capacity when opening a mainly active load circuit in which the load can be represented by resistors and reactors in parallel 3.7.103 no-load transformer breaking capacity breaking capacity when opening a no-load transformer circuit 3.7.104 closed-loop breaking capacity breaking capacity when opening a closed transmission line loop circuit, or a transformer in parallel with one or more transformers, i.e. a circuit in which both sides of the switch remain energized after breaking, and in which the voltage appearing across the terminals is substantially less than the system voltage 3.7.105 cable-charging breaking capacity breaking capacity when opening a cable circuit at no load 3.7.106 line-charging breaking capacity breaking capacity when opening an overhead line circuit at no load 3.7.107 busbar charging breaking capacity breaking capacity when opening a busbar circuit at no load 3.7.108 single capacitor bank breaking capacity breaking capacity when opening a single capacitor bank circuit connected to a supply that does not include another capacitor bank adjacent to the bank being switched SIST EN 62271-104:2009

62271-104 © IEC:2009 – 11 – 3.7.109 back-to-back capacitor bank breaking capacity breaking capacity when opening a capacitor bank circuit connected to a supply that includes one or more capacitor banks adjacent to the bank being switched 3.7.110 capacitor bank inrush making current high frequency and high magnitude current occurring when closing a capacitor bank circuit onto a supply including one or more capacitor banks adjacent to the bank being switched NOTE The frequency and magnitude of the inrush current depend upon the values of capacitance and the values of the inductance between the capacitor banks. 3.7.111 shunt reactor breaking capacity breaking capacity when opening a shunt reactor circuit, including secondary or tertiary reactors switched from the primary side of the transformer 3.7.112 earth-fault breaking capacity breaking capacity in the faulty phase of a non-effectively earthed neutral system when clearing an earth fault on an unloaded cable or overhead line on the load side of the switch 3.7.113 cable and line charging breaking capacity under earth fault conditions breaking capacity in the sound phases of an effectively earthed neutral or non-effectively earthed neutral system when switching off an unloaded cable or overhead line, with an earth fault on the supply side of the switch 3.7.114 breaking current (of a switching device or a fuse) current in a pole of a switching device or in a fuse at the instant of initiation of the arc during a breaking process [IEV 441-17-07] 3.7.115 (peak)-making current peak value of the first major loop of the current in a pole of a switch during the transient period following the initiation of current during a making operation NOTE 1 The peak value may differ from one pole to another and from one operation to another as it depends on the instant of current initiation relative to the wave of the applied voltage. NOTE 2 Where, for a polyphase circuit, a single value of (peak) making current is referred to, it is, unless otherwise stated, the highest value in any phase. 3.7.116 short-circuit making capacity making capacity for which the prescribed conditions include a short-circuit at the terminals of the switching device [441-17-10] 3.7.117 simultaneity between poles maximum difference between the instant of contact touch in the first pole and the last pole when closing and the maximum time difference between the instant of contact separation between the first pole and the last pole when opening SIST EN 62271-104:2009

– 12 – 62271-104 © IEC:2009 4 Ratings1 Clause 4 of IEC 62271-1 is applicable with the additions indicated below. 4.1 Rated voltage (Ur) Subclause 4.1 of IEC 62271-1 is applicable. 4.2 Rated insulation level Subclause 4.2 of IEC 62271-1 is applicable. 4.3 Rated frequency (fr) Subclause 4.3 of IEC 62271-1 is applicable. 4.4 Rated normal current and temperature rise (Ir) Subclause 4.4 of IEC 62271-1 is applicable. 4.5 Rated short-time withstand current (Ik) Subclause 4.5 of IEC 62271-1 is applicable. 4.6 Rated peak withstand current (Ip) Subclause 4.6 of IEC 62271-1 is applicable. 4.7 Rated duration of short-circuit (tk) Subclause 4.7 of IEC 62271-1 is applicable. 4.8 Rated supply voltage of closing and opening devices and of auxiliary and control circuits (Ua) Subclause 4.8 of IEC 62271-1 is applicable. 4.9 Rated supply frequency of closing and opening devices and of auxiliary circuits Subclause 4.9 of IEC 62271-1 is applicable. 4.10 Rated pressure of compressed gas supply for controlled pressure systems Subclause 4.10 of IEC 62271-1 is applicable. 4.11 Rated filling levels for insulation and/or operation Subclause 4.11 of IEC 62271-1 is applicable. ————————— 1
Note concerning the rated values:
In English, the terms “rated making current” and “rated breaking current” are now used where formerly “rated
making capacity” and “rated breaking capacity” were used, the intended meaning being adequately conveyed by the use of “rated”. In French, the terms “pouvoir de fermeture assigné” and “pouvoir de coupure assigné” continue to be used. SIST EN 62271-104:2009

62271-104 © IEC:2009 – 13 – 4.101 Rated earth fault breaking current The rated earth fault breaking current, for a non-effectively earthed neutral system is the maximum earth fault current in the faulted phase that the switch shall be capable of breaking at its rated voltage. NOTE The TRV (transient recovery voltage) of an isolated neutral system is more severe than the TRV of a resonant earthed system, even if detuned. 4.102 Rated short-circuit making current The rated short-circuit making current is the maximum peak prospective current that the switch shall be capable of making at its rated voltage. 4.103 Rated mainly active load-breaking current The rated mainly active load-breaking current is the maximum mainly active load current that the switch shall be capable of breaking at its rated voltage. 4.104 Rated closed-loop breaking current The rated closed-loop breaking current is the maximum closed-loop current the switch shall be capable of breaking. Separate ratings for transmission line loop current and parallel transformer current may be assigned. 4.105 Rated capacitive switching currents 4.105.1 Rated line-charging breaking current The rated line-charging breaking current is the maximum line-charging current that the switch shall be capable of breaking at its rated voltage. 4.105.2 Rated cable-charging breaking current The rated cable-charging breaking current is the maximum cable-charging current that the switch shall be capable of breaking at its rated voltage. 4.105.3 Rated single capacitor bank breaking current The rated capacitor bank breaking current is the maximum capacitor current the switch shall be capable of breaking at the rated voltage under the conditions of use and behaviour prescribed in this standard. The breaking current refers to the switching of a shunt capacitor bank where no shunt capacitors are connected to the source side of the switch. 4.105.4 Rated back-to-back capacitor bank breaking current The rated back-to-back capacitor bank breaking current is the maximum capacitor bank breaking current that the switch shall be capable of breaking at its rated voltage with one or more capacitor banks connected on the supply side of the switch adjacent to the bank being switched, such as to produce the rated capacitor bank inrush making current. This breaking current refers to the switching of a shunt capacitor bank where one or several shunt capacitor banks are connected to the source side of the switch giving an inrush making current equal to the rated back-to-back capacitor bank inrush making current. NOTE Similar conditions could apply for switching at substations with cables. SIST EN 62271-104:2009

– 14 – 62271-104 © IEC:2009 4.105.5 Single capacitor bank inrush making current No rating or preferred values are defined. This is because inrush currents associated with single capacitor banks are not considered critical. 4.105.6 Rated back-to-back capacitor bank inrush making current The rated back-to-back capacitor bank inrush making current is the peak value of the current that the switch shall be capable of making at its rated voltage and with a frequency of the inrush current appropriate to the service conditions (see Table 9 of IEC 62271-100). NOTE The back-to-back capacitor bank making performance is covered when – the tested peak inrush making current is equal to or greater than the rated value, and
– the tested frequency of the inrush making current is equal to or greater than 77 % of the rated value. The applicability of this rule is limited to frequencies below 6 000 Hz. 4.105.7 Rated cable and line-charging breaking current under earth fault conditions The rated cable and line-charging breaking current under earth fault conditions, for a non-effectively earthed neutral system is the current in the sound phases that the switch shall be capable of breaking at its rated voltage. NOTE The maximum cable and line-charging current under fault conditions is √3 times the cable and line charging current occurring in normal conditions. This covers the most severe case, which occurs with individually screened cables. 4.106 Inductive load switching 4.106.1 Shunt reactor breaking current The shunt reactor breaking current is the maximum shunt reactor current that the switch shall be capable of breaking at its rated voltage. NOTE The minimum shunt reactor breaking current, if other than zero, that the switch is capable of breaking should be specified by the manufacturer. 4.106.2 Rated no-load transformer breaking current The rated no-load transformer breaking current is the maximum no-load transformer current the switch shall be capable of breaking at its rated voltage. 4.107 Rated mechanical terminal load Subclause 4.103 of IEC 62271-102 is applicable. 4.108 Coordination of rated values for a general-purpose switch A general-purpose switch shall have specific ratings for each switching duty as follows: – rated mainly active load breaking current equal to the rated normal current; – rated no-load transformer breaking current equal to 1,0 % of the rated normal current; – rated transmission line loop breaking current equal to the rated normal current; – rated parallel transformer breaking current equal to 50 % of the rated normal current;
– rated cable-charging breaking current as shown in Table 1; – rated line-charging breaking current as shown in Table 1; – rated short-circuit making current equal to the rated peak withstand current. SIST EN 62271-104:2009

62271-104 © IEC:2009 – 15 – The standard values of ratings should be selected from the R10 series specified in IEC 60059. Table 1 – Preferred values of line- and cable-charging breaking
currents for a general-purpose switch Rated voltage Ur
kV Rated cable-charging breaking current I4a A Rated line-charging breaking current I4b A 52 72,5 100 123 145 170 245 300 362 420 550 800 25 25 31,5 31,5 31,5 40 40 50 50 63 – – 2 3 5 8 20 12,5 25 31,5 50 63 80 125 NOTE 1 Higher values selected from the R10 series may be stated by the man
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