High-voltage switchgear and controlgear - Part 107: Alternating current fused circuit-switchers for rated voltages above 1 kV up to and including 52 kV

IEC 62271-107:2019 is available as IEC 62271-107:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62271-107:2019 applies to three-pole-operated fused circuit-switchers designed with rated voltages above 1 kV up to and including 52 kV for use on three-phase alternating current systems of either 50 Hz or 60 Hz. This third edition cancels and replaces the second edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) technical changes introduced by the second edition of IEC 62271-1 are applied, where relevant;
b) rated TRV is removed and TRV is now treated as a test parameter), as in IEC 62271-100;
c) the term "thermal current" is no longer used; the rated continuous current is linked to the installed fuse-links, and values shall be provided by the manufacturer together with the list of the acceptable fuse-links; for tests purpose, the highest rated continuous current listed is referred, where previously the wording was "rated maximum thermal current", for consistency with IEC 62271-105;
d) making and breaking test duties are independent type tests (as some may be omitted if the switching device has been validated as a load-break switch). However, TDIt0 and TDIlow are kept as a sequence as they are linked to the same rated value (It0);
e) differentiation has been introduced between requirements expressed for fulfilling the function expected from a fused circuit-switcher, from requirements only relevant when the function is performed by a stand-alone device. The goal is to avoid duplication or conflicts of requirements with a standard dealing with assemblies, when the function is implemented within such an assembly.

Appareillage à haute tension - Partie 107: Circuits-switchers à fusibles pour courant alternatif de tension assignée supérieure à 1 kV et jusqu'à 52 kV inclus

IEC 62271-107:2019 est disponible sous forme de IEC 62271-107:2019 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 62271-107:2019 s'applique aux circuits-switchers à fusibles à manœuvre tripolaire conçus avec des tensions assignées supérieures à 1 kV et inférieures ou égales à 52 kV, pour utilisation sur des réseaux alternatifs triphasés de fréquence 50 Hz ou 60 Hz. Cette troisième édition annule et remplace la deuxième édition parue en 2012. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) les modifications techniques introduites par la deuxième édition de l'IEC 62271-1 sont appliquées, lorsqu'elles sont pertinentes;
b) la TTR assignée est supprimée et la TTR est maintenant traitée comme un paramètre d'essai, comme dans l'IEC 62271-100;
c) le terme "courant thermique" n'est plus employé; le courant permanent assigné est lié aux éléments de remplacement installés, et les valeurs doivent être fournies par le constructeur ainsi que la liste des éléments de remplacement acceptables; pour les besoins des essais, le courant continu assigné le plus élevé est indiqué dans la liste, en lieu et place du terme "valeur de courant thermique maximal assignée" à des fins de cohérence avec
l'IEC 62271-105;
d) les séries d'essais d'établissement et de coupure sont des essais de type indépendants (certains peuvent être omis si l'appareil de coupure a été validé en tant qu'interrupteur de charge). Cependant, TDIt0 et TDIlow sont conservés sous forme de séquence car ils sont liés à la même valeur assignée (It0);
e) une distinction est désormais faite entre les exigences formulées pour remplir la fonction attendue d'un circuit-switcher à fusibles, et celles uniquement pertinentes lorsque la fonction est assurée par un appareil autonome. L'objectif est d'éviter la duplication ou les conflits d'exigences avec une norme traitant des ensembles, lorsque la fonction est mise en œuvre au sein d'un tel ensemble.

General Information

Status
Published
Publication Date
27-May-2019
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
28-May-2019
Ref Project

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IEC 62271-107:2019 - High-voltage switchgear and controlgear - Part 107: Alternating current fused circuit-switchers for rated voltages above 1 kV up to and including 52 kV
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IEC 62271-107
Edition 3.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 107: Alternating current fused circuit-switchers for rated voltages
above 1 kV up to and including 52 kV
Appareillage à haute tension –
Partie 107: Circuits-switchers à fusibles pour courant alternatif de tension
assignée supérieure à 1 kV et jusqu'à 52 kV inclus
IEC 62271-107:2019-05(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62271-107
Edition 3.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 107: Alternating current fused circuit-switchers for rated voltages
above 1 kV up to and including 52 kV
Appareillage à haute tension –
Partie 107: Circuits-switchers à fusibles pour courant alternatif de tension
assignée supérieure à 1 kV et jusqu'à 52 kV inclus
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.10 ISBN 978-2-8322-6924-4

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 – IEC 62271-107:2019 © IEC 2019
CONTENTS

FOREWORD ........................................................................................................................... 6

INTRODUCTION ..................................................................................................................... 8

1 Scope .............................................................................................................................. 9

2 Normative references ...................................................................................................... 9

3 Terms and definitions .................................................................................................... 10

3.1 General terms and definitions ............................................................................... 10

3.2 Assemblies of switchgear and controlgear ............................................................ 10

3.3 Parts of assemblies .............................................................................................. 10

3.4 Switching devices ................................................................................................. 10

3.5 Parts of switchgear and controlgear ...................................................................... 10

3.6 Operational characteristics of switchgear and controlgear ..................................... 11

3.7 Characteristic quantities ....................................................................................... 11

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

4 Normal and special service conditions ........................................................................... 14

5 Ratings .......................................................................................................................... 15

5.1 General ................................................................................................................. 15

5.2 Rated voltage (U ) ................................................................................................ 15

5.3 Rated insulation level (U , U , U ) ....................................................................... 15

d p s

5.4 Rated frequency (f ) .............................................................................................. 15

5.5 Rated continuous current (I ) ................................................................................ 15

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

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

5.8 Rated duration of short-circuit (t ) ......................................................................... 16

5.9 Rated supply voltage of auxiliary and control circuits (U ) .................................... 16

5.10 Rated supply frequency of auxiliary and control circuits ........................................ 16

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

5.101 Rated short-circuit breaking current (I ) .............................................................. 16

5.102 Rated short-circuit making current (I ) ............................................................... 16

5.103 Rated take-over current (I ) ................................................................................. 17

6 Design and construction ................................................................................................ 18

6.1 Requirements for liquids in fused circuit-switchers ................................................ 18

6.2 Requirements for gases in fused circuit-switchers ................................................. 18

6.3 Earthing of fused circuit-switchers ........................................................................ 18

6.4 Auxiliary and control equipment and circuits ......................................................... 18

6.5 Dependent power operation .................................................................................. 18

6.6 Stored energy operation........................................................................................ 18

6.7 Independent unlatched operation (independent manual or power operation) ......... 18

6.8 Manually operated actuators ................................................................................. 18

6.9 Operation of releases............................................................................................ 18

6.10 Pressure/level indication ....................................................................................... 18

6.11 Nameplates .......................................................................................................... 18

6.12 Locking devices .................................................................................................... 20

6.13 Position indication ................................................................................................. 20

---------------------- Page: 4 ----------------------
IEC 62271-107:2019 © IEC 2019 – 3 –

6.14 Degrees of protection provided by enclosures ....................................................... 20

6.15 Creepage distances for outdoor insulators ............................................................ 20

6.16 Gas and vacuum tightness .................................................................................... 20

6.17 Tightness for liquid systems .................................................................................. 20

6.18 Fire hazard (flammability) ..................................................................................... 20

6.19 Electromagnetic compatibility (EMC) ..................................................................... 20

6.20 X-ray emission ...................................................................................................... 20

6.21 Corrosion .............................................................................................................. 21

6.22 Filling levels for insulation, switching and/or operation .......................................... 21

6.101 Basic requirements for fuses ................................................................................. 21

6.102 Linkages between the fuse striker(s) and the circuit-switcher release ................... 21

6.103 Low over-current conditions (long fuse-pre-arcing time conditions) ....................... 21

6.104 Rated continuous current values ........................................................................... 21

7 Type tests ..................................................................................................................... 22

7.1 General ................................................................................................................. 22

7.2 Dielectric tests ...................................................................................................... 22

7.3 Radio interference voltage (RIV) test .................................................................... 22

7.4 Resistance measurement ...................................................................................... 22

7.5 Continuous current tests ....................................................................................... 22

7.6 Short-time withstand current and peak withstand current tests .............................. 22

7.7 Verification of the protection ................................................................................. 22

7.8 Tightness tests ..................................................................................................... 23

7.9 Electromagnetic compatibility tests (EMC) ............................................................ 23

7.10 Additional tests on auxiliary and control circuits .................................................... 23

7.11 X-radiation test for vacuum interrupters ................................................................ 23

7.101 Making and breaking tests .................................................................................... 23

7.101.1 General ......................................................................................................... 23

7.101.2 Conditions for performing the tests ................................................................ 23

7.101.3 Test duty procedures ..................................................................................... 29

7.101.4 Behaviour of the fused circuit-switcher during tests ....................................... 35

7.101.5 Condition of the apparatus after tests ............................................................ 35

7.102 Mechanical operation tests ................................................................................... 36

7.102.1 General ......................................................................................................... 36

7.102.2 Test procedure .............................................................................................. 36

7.102.3 Condition of fused circuit-switcher during and after mechanical

operation tests ............................................................................................... 37

7.102.4 Condition of the fuses during and after mechanical operation tests ................ 37

7.103 Extension of validity of type tests .......................................................................... 37

7.103.1 General ......................................................................................................... 37

7.103.2 Dielectric properties ....................................................................................... 38

7.103.3 Continuous current tests ................................................................................ 38

7.103.4 Making and breaking ..................................................................................... 38

8 Routine tests ................................................................................................................. 38

8.1 General ................................................................................................................. 38

8.2 Dielectric test on the main circuit .......................................................................... 38

8.3 Tests on auxiliary and control circuits ................................................................... 38

8.4 Measurement of the resistance of the main circuit ................................................. 39

8.5 Tightness test ....................................................................................................... 39

8.6 Design and visual checks ...................................................................................... 39

---------------------- Page: 5 ----------------------
– 4 – IEC 62271-107:2019 © IEC 2019

8.101 Mechanical operating tests ................................................................................... 39

9 Guide to the selection of fused circuit-switchers (informative) ........................................ 40

9.1 General ................................................................................................................. 40

9.2 Selection of rated values ....................................................................................... 40

9.3 Cable interface consideration ................................................................................ 40

9.4 Continuous or temporary overload due to changed service conditions ................... 40

9.5 Environmental aspects .......................................................................................... 40

9.101 Additional criteria .................................................................................................. 40

9.102 Rated short-circuit breaking current ...................................................................... 41

9.103 Rated continuous current ...................................................................................... 41

9.104 Currents between rated continuous current and I of the fuses ............................. 41

9.105 Transfer current .................................................................................................... 41

9.106 Take-over current ................................................................................................. 41

9.107 Extension of the validity of type tests .................................................................... 42

9.108 Operation .............................................................................................................. 42

9.109 Comparison of performances of fused circuit-switchers with performances of

switch-fuse combinations and circuit-breakers ...................................................... 43

10 Information to be given with enquiries, tenders and orders (informative) ........................ 43

10.1 General ................................................................................................................. 43

10.2 Information with enquiries and orders ................................................................... 43

10.3 Information with tenders ........................................................................................ 43

11 Transport, storage, installation, operating instructions and maintenance ....................... 44

12 Safety ............................................................................................................................ 44

13 Influence of the product on the environment .................................................................. 44

Annex A (informative) Applicability of the rated take-over current test duty .......................... 45

A.1 Problem formulation .............................................................................................. 45

A.2 Background .......................................................................................................... 45

A.3 Terms, definitions and symbols ............................................................................. 46

A.4 Assumptions about the fuse melting process ......................................................... 47

A.4.1 General ......................................................................................................... 47

A.4.2 First phase .................................................................................................... 47

A.4.3 Second phase ................................................................................................ 47

A.4.4 Modelling of the "application margin" ............................................................. 48

A.5 Mathematical expression of the application requirements ...................................... 48

A.5.1 General ......................................................................................................... 48

A.5.2 First pole-to-clear .......................................................................................... 48

A.5.3 Second pole-to-clear ..................................................................................... 48

A.6 Analysis ................................................................................................................ 50

A.6.1 Applications with fuse strikers ........................................................................ 50

A.6.2 Applications with protection relays ................................................................. 51

A.7 Conclusions .......................................................................................................... 52

Annex B (informative) Particular conditions existing in certain countries .............................. 53

Bibliography .......................................................................................................................... 54

Figure 1 – Characteristics for determining the take-over current ........................................... 17

Figure 2 – Arrangement of test circuits for test duties TD , TD , TD and TD ........... 26

Ir Isc Ito Ilow
---------------------- Page: 6 ----------------------
IEC 62271-107:2019 © IEC 2019 – 5 –

Figure 3 – Representation of a specified TRV by a two-parameter reference line and a

delay line .............................................................................................................................. 28

Figure 4 – Example of a two parameters envelope for a TRV ................................................ 29

Figure 5 – Measurement of the power frequency recovery voltage with striker operation ....... 31

Figure A.1 – Visualization of the application margin for a given fuse ..................................... 47

Table 1 – Nameplate information .......................................................................................... 19

Table 2 – Summary of test parameters for test duties ........................................................... 34

Table 3 – Comparison between switch-fuse combination and fused circuit-switcher .............. 43

Table 4 – Comparison between fused circuit-switcher and circuit breaker ............................. 43

Table A.1 – Minimum application margin Am according to fuse characteristic ........................ 51

Table A.2 – Minimum protection time delay ........................................................................... 51

Table A.3 – Examples of possible need for time delay .......................................................... 52

Table B.1 – Voltages used in the Czech Republic ................................................................. 53

Table B.2 – Rated insulation levels for voltage ratings of Table B.1 ...................................... 53

---------------------- Page: 7 ----------------------
– 6 – IEC 62271-107:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 107: Alternating current fused circuit-switchers for
rated voltages above 1 kV up to and including 52 kV
FOREWORD

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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62271-107 has been prepared by subcommittee 17A: Switching

devices, of IEC technical committee 17: High-voltage switchgear and controlgear

This third edition cancels and replaces the second edition published in 2012. This edition

constitutes a technical revision.

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

edition:

a) technical changes introduced by the second edition of IEC 62271-1 are applied, where

relevant;

b) rated TRV is removed and TRV is now treated as a test parameter, as in IEC 62271-100;

c) the term "thermal current" is no longer used; the rated continuous current is linked to the

installed fuse-links, and values shall be provided by the manufacturer together with the list

of the acceptable fuse-links; for tests purpose, the highest rated continuous current listed

---------------------- Page: 8 ----------------------
IEC 62271-107:2019 © IEC 2019 – 7 –

is referred, where previously the wording was "rated maximum thermal current", for

consistency with IEC 62271-105;

d) making and breaking test duties are independent type tests (as some may be omitted if

and
the switching device has been validated as a load-break switch). However, TD
It0
TD are kept as a sequence as they are linked to the same rated value (I );
Ilow t0

e) differentiation has been introduced between requirements expressed for fulfilling the

function expected from a fused circuit-switcher, from requirements only relevant when the

function is performed by a stand-alone device. The goal is to avoid duplication or conflicts

of requirements with a standard dealing with assemblies, when the function is
implemented within such an assembly.
The text of this International Standard is based on the following documents:
FDIS Report on voting
17A/1216/FDIS 17A/1227/RVD
Full information on the voting for the approval of this International Standard
...

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