High-voltage switchgear and controlgear - Part 105: Alternating current switch-fuse combinations for rated voltages above 1 kV up to and including 52 kV

IEC 62271-105:2012 applies to three-pole units for public and industrial distribution systems which are functional assemblies of switches including switch-disconnectors and current-limiting fuses designed so as to be capable of
- breaking, at the rated recovery voltage, any current up to and including the rated short-circuit breaking current;
- making, at the rated voltage, circuits to which the rated short-circuit breaking current applies.
It does not apply to fuse-circuit-breakers, fuse-contactors, combinations for motor-circuits or to combinations incorporating single capacitor bank switches. This second edition cancels and replaces the first edition of IEC 62271-105, published in 2002, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- implementation of figures at the place where they are cited first;
- renumbering of tables;
- addition of some of the proposals from IEC paper 17A/852/INF;
- addition of missing subclauses of IEC 62271-1;
- implementation of 6.105 "Extension of validity of type tests" and consequently removing of the relevant parts in the different existing clauses;
- change of 7th paragraph of 6.101.4 as there is now a definition of NSDD given in 3.7.4 of IEC 62271-1:2007. Harmonization with IEC 62271-107;
- some referenced clauses in other standards like IEC 60282-1 were changed and therefore changed the editions under 1.2 to the ones referred to;
- addition of a new Annex C defining tolerances.
This publication is to be read in conjunction with IEC 62271-1:2007.

Appareillage à haute tension - Partie 105: Combinés interrupteurs-fusibles pour courant alternatif de tensions assignées supérieures à 1 kV et jusqu'à 52 kV inclus

La CEI 62271-105:2012 est applicable aux appareils tripolaires utilisés dans les réseaux de distribution publics ou les installations industrielles qui forment des ensembles fonctionnels composés d'interrupteurs ou d'interrupteurs-sectionneurs et de fusibles limiteurs de courant, conçus pour être capable de
- couper, à la tension de rétablissement assignée, tous les courants jusqu'au pouvoir de coupure assigné inclus;
- établir, à la tension assignée, des circuits pour lesquels le pouvoir de coupure assigné s'applique.
Elle ne s'applique ni aux combinés disjoncteurs-fusibles, ni aux contacteurs-fusibles, ni aux combinés destinés à la manoeuvre et à la protection des moteurs ou des batteries de condensateurs. Cette deuxième édition annule et remplace la première édition de la CEI 62271-105, publiée en 2002, et constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- la mise en place des figures aux endroits où elles sont citées en premier;
- la renumérotation des tableaux;
- l'ajout, en partie, de propositions issues du document 17A/852/INF de la CEI;
- l'ajout de paragraphes manquants de la CEI 62271-1;
- l'introduction du 6.105 "Extension de la validité des essais de type" et en conséquence, suppression des parties correspondantes dans les différents articles existants;
- la modification du septième alinéa du 6.101.4, du fait qu'il y a maintenant une définition des NSDD (décharges disruptives non soutenues) donnée au 3.7.4 de la CEI 62271 1:2007. Harmonisation avec la CEI 62271-107;
- certains articles référencés dans d'autres normes, comme dans la CEI 60282-1, ont été modifiés, si bien que les éditions indiquées au 1.2 ont été modifiées en consequence;
- l'ajout d'une nouvelle Annexe C définissant les tolérances.
Cette publication doit être lue conjointement avec la CEI 62271-1:2007.

General Information

Status
Published
Publication Date
26-Sep-2012
Technical Committee
Current Stage
PPUB - Publication issued
Start Date
27-Sep-2012
Completion Date
27-Sep-2012
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IEC 62271-105
Edition 2.0 2012-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 105: Alternating current switch-fuse combinations for rated voltages above
1 kV up to and including 52 kV
Appareillage à haute tension –
Partie 105: Combinés interrupteurs-fusibles pour courant alternatif de tensions
assignées supérieures à 1 kV et jusqu'à 52 kV inclus
IEC 62271-105:2012
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
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---------------------- Page: 2 ----------------------
IEC 62271-105
Edition 2.0 2012-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 105: Alternating current switch-fuse combinations for rated voltages above
1 kV up to and including 52 kV
Appareillage à haute tension –
Partie 105: Combinés interrupteurs-fusibles pour courant alternatif de tensions
assignées supérieures à 1 kV et jusqu'à 52 kV inclus
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XA
ICS 29.130.10 ISBN 978-2-83220-401-6

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
---------------------- Page: 3 ----------------------
– 2 – 62271-105 © IEC:2012
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 of switchgear and controlgear ............................................................ 8

3.3 Parts of assemblies .............................................................................................. 8

3.4 Switching devices ................................................................................................. 8

3.5 Parts of switchgear and controlgear ...................................................................... 9

3.6 Operation ........................................................................................................... 10

3.7 Characteristic quantities ..................................................................................... 10

3.101 Fuses ................................................................................................................. 14

4 Ratings ........................................................................................................................... 15

4.1 Rated voltage (U ) .............................................................................................. 15

4.2 Rated insulation level ......................................................................................... 15

4.3 Rated frequency (f ) ............................................................................................ 15

4.4 Rated normal current and temperature rise ......................................................... 15

4.4.1 Rated normal current (I ) ......................................................................... 15

4.4.2 Temperature rise ..................................................................................... 15

4.5 Rated short-time withstand current (I ) ............................................................... 15

4.6 Rated peak withstand current (I ) ....................................................................... 15

4.7 Rated duration of short-circuit (t ) ....................................................................... 15

4.8 Rated supply voltage of closing and opening devices and of auxiliary and

control circuits (U ) ............................................................................................. 16

4.9 Rated supply frequency of closing and opening devices and of auxiliary

circuits ................................................................................................................ 16

4.10 Rated pressure of compressed gas supply for controlled pressure systems ........ 16

4.11 Rated filling levels for insulation and/or operation ............................................... 16

4.101 Rated short-circuit breaking current .................................................................... 16

4.102 Rated transient recovery voltage ........................................................................ 16

4.103 Rated short-circuit making current ...................................................................... 16

4.104 Rated transfer current (striker operation) (I ) ............................................. 17

rtransfer

4.105 Rated take-over current for release-operated combinations (I ) ......................... 17

5 Design and construction ................................................................................................. 17

5.1 Requirements for liquids in switch-fuse combinations ......................................... 17

5.2 Requirements for gases in switch-fuse combinations .......................................... 17

5.3 Earthing of switch-fuse combinations .................................................................. 17

5.4 Auxiliary and control equipment .......................................................................... 17

5.5 Dependent power operation ................................................................................ 17

5.6 Stored energy operation ..................................................................................... 17

5.7 Independent manual or power operation (independent unlatched operation) ....... 17

5.8 Operation of releases ......................................................................................... 17

5.9 Low- and high-pressure interlocking and monitoring devices ............................... 17

5.10 Nameplates ........................................................................................................ 17

---------------------- Page: 4 ----------------------
62271-105 © IEC:2012 – 3 –

5.11 Interlocking devices ............................................................................................ 18

5.12 Position indication .............................................................................................. 18

5.13 Degrees of protection provided by enclosures..................................................... 18

5.14 Creepage distances for outdoor insulators .......................................................... 18

5.15 Gas and vacuum tightness .................................................................................. 19

5.16 Liquid tightness .................................................................................................. 19

5.17 Fire hazard (flammability) ................................................................................... 19

5.18 Electromagnetic compatibility (EMC)................................................................... 19

5.19 X-ray emission .................................................................................................... 19

5.20 Corrosion ............................................................................................................ 19

5.101 Linkages between the fuse striker(s) and the switch release ............................... 19

5.102 Low over-current conditions (long fuse-pre-arcing time conditions) ..................... 19

6 Type tests ...................................................................................................................... 20

6.1 General .............................................................................................................. 20

6.1.1 Grouping of tests .................................................................................. 20

6.1.2 Information for identification of specimens ............................................ 21

6.1.3 Information to be included in the type-test reports ................................. 21

6.2 Dielectric tests .................................................................................................... 21

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.............................................. 22

6.101 Making and breaking tests .................................................................................. 22

6.101.1 General ................................................................................................. 22

6.101.2 Conditions for performing the tests ........................................................ 22

6.101.3 Test-duty procedures ............................................................................ 28

6.101.4 Behaviour of the combination during tests ............................................. 33

6.101.5 Condition of the apparatus after testing ................................................. 33

6.102 Mechanical operation tests ................................................................................. 34

6.103 Mechanical shock tests on fuses ......................................................................... 34

6.104 Thermal test with long pre-arcing time of fuse ..................................................... 35

6.105 Extension of validity of type tests ........................................................................ 35

6.105.1 Dielectric ............................................................................................... 35

6.105.2 Temperature rise ................................................................................... 35

6.105.3 Making and breaking ............................................................................. 35

7 Routine tests .................................................................................................................. 36

7.101 Mechanical operating tests ................................................................................. 36

8 Guide for the selection of switch-fuse combinations ........................................................ 36

8.1 Selection of rated values ....................................................................................... 36

8.2 Continuous or temporary overload due to changed service conditions ................... 37

8.101 Guide for the selection of switch-fuse combination for transformer protection ........ 37

8.101.1 General ................................................................................................. 37

8.101.2 Rated short-circuit breaking current ...................................................... 37

---------------------- Page: 5 ----------------------
– 4 – 62271-105 © IEC:2012
8.101.3 Primary fault condition caused by a solid short-circuit on the

transformer secondary terminals ........................................................... 37

8.102 Coordination of switch and fuses for extension of the reference list ....................... 38

8.102.1 General ................................................................................................. 38

8.102.2 Rated normal current ............................................................................ 38

8.102.3 Low over-current performance .............................................................. 39

8.102.4 Transfer current .................................................................................... 39

8.102.5 Take-over current .................................................................................. 39

8.102.6 Extension of the validity of type tests .................................................... 39

8.103 Operation .............................................................................................................. 39

9 Information to be given with enquiries, tenders and orders ............................................. 40

9.1 Information with enquiries and orders .................................................................... 40

9.2 Information with tenders ........................................................................................ 40

10 Transport, storage, installation, operation and maintenance ........................................... 40

11 Safety ............................................................................................................................. 41

12 Influence of the product on the environment ................................................................... 41

Annex A (informative) Example of the coordination of fuses, switch and transformer ............ 42

Annex B (normative) Procedure for determining transfer current .......................................... 45

Annex C (normative) Tolerances on test quantities for type tests ......................................... 50

Bibliography .......................................................................................................................... 51

Figure 1 – Arrangement of test circuits for test duties TD and TD ............................. 23

Isc IWmax

Figure 2 – Arrangement of test circuits for test-duty TD .............................................. 24

Itransfer

Figure 3 – Arrangement of test circuits for test-duty TD ..................................................... 24

Ito

Figure 4 – Determination of power-frequency recovery voltage ............................................. 26

Figure 5 – Representation of a specified TRV by a two-parameter reference line and a

delay line .............................................................................................................................. 27

Figure 6 – Example of a two-parameter reference line for a TRV .......................................... 28

Figure 7 – Characteristics for determining take-over current ................................................. 32

Figure 8 – Transfer current in relation to the primary fault current I due to a solid

short circuit in the transformer secondary terminal ................................................................ 38

Figure A.1 – Characteristics relating to the protection of an 11 kV – 400 kVA

transformer ........................................................................................................................... 43

Figure A.2 – Discrimination between HV and LV fuses .......................................................... 44

Figure B.1 – Practical determination of the transfer current ................................................... 46

Figure B.2 – Determination of the transfer current with the iterative method .......................... 48

Table 1 – Nameplate markings .............................................................................................. 18

Table 2 – Standard values of prospective TRV for test-duty TD based on
Itransfer

practice in Europe ................................................................................................................. 30

Table 3 – Standard values of prospective TRV for test-duty TD based on
Itransfer

practice in the United States of America and Canada ............................................................ 31

Table 4 – Summary of test parameters for test duties ........................................................... 32

Table C.1 – Tolerances on test quantities for type tests ........................................................ 50

---------------------- Page: 6 ----------------------
62271-105 © IEC:2012 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 105: Alternating current switch-fuse combinations
for rated voltages above 1 kV up to and including 52 kV
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

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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

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services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

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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 62271-105 has been prepared by subcommittee 17A, High-voltage

switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear.

This second edition cancels and replaces the first edition of IEC 62271-105, published in

2002, and constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
– implementation of figures at the place where they are cited first;
– renumbering of tables;
– addition of some of the proposals from IEC paper 17A/852/INF;
– addition of missing subclauses of IEC 62271-1;

– implementation of 6.105 "Extension of validity of type tests" and consequently removing of

the relevant parts in the different existing clauses;
---------------------- Page: 7 ----------------------
– 6 – 62271-105 © IEC:2012

– change of 7th paragraph of 6.101.4 as there is now a definition of NSDD given in 3.7.4 of

IEC 62271-1:2007. Harmonization with IEC 62271-107;

– some referenced clauses in other standards like IEC 60282-1 were changed and therefore

changed the editions under 1.2 to the ones referred to;
– addition of a new Annex C defining tolerances.
The text of this standard is based the following documents:
FDIS Report on voting
17A/1013/FDIS 17A/1022/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, to which it refers and which

is applicable, unless otherwise specified in this standard. In order to simplify the indication of

corresponding requirements, the same numbering of clauses and subclauses is used as in

IEC 62271-1. 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 publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 8 ----------------------
62271-105 © IEC:2012 – 7 –
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 105: Alternating current switch-fuse combinations
for rated voltages above 1 kV up to and including 52 kV
1 General
1.1 Scope

Subclause 1.1 of IEC 62271-1:2007 is not applicable, and is replaced as follows:.

This part of IEC 62271 applies to three-pole units for public and industrial distribution systems

which are functional assemblies of switches including switch-disconnectors and current-

limiting fuses designed so as to be capable of

– breaking, at the rated recovery voltage, any current up to and including the rated short-

circuit breaking current;

– making, at the rated voltage, circuits to which the rated short-circuit breaking current

applies.

It does not apply to fuse-circuit-breakers, fuse-contactors, combinations for motor-circuits or

to combinations incorporating single capacitor bank switches.

In this standard, the word “combination” is used for a combination in which the components

constitute a functional assembly. Each association of a given type of switch and a given type

of fuse defines one type of combination.

In practice, different types of fuses may be combined with one type of switch, which give

several combinations with different characteristics, in particular concerning the rated currents.

Moreover, for maintenance purposes, the user should know the types of fuses that can be

combined to a given switch without impairing compliance to the standard, and the
corresponding characteristics of the so-made combination.

A switch-fuse combination is then defined by its type designation and a list of selected fuses

is defined by the manufacturer, the so-called “reference list of fuses”. Compliance with this

standard of a given combination means that every combination using one of the selected

fuses is proven to be in compliance with this standard.

The fuses are incorporated in order to extend the short-circuit breaking rating of the

combination beyond that of the switch alone. They are fitted with strikers in order both to open

automatically all three poles of the switch on the operation of a fuse and to achieve a correct

operation at values of fault current above the minimum melting current but below the minimum

breaking c
...

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