IEC 62271-108:2020

High-voltage switchgear and controlgear - Part 108: High-voltage alternating current disconnecting circuit-breakers for rated voltages above 52 kV

IEC 62271-108:2020

Name:IEC 62271-108:2020   Standard name:High-voltage switchgear and controlgear - Part 108: High-voltage alternating current disconnecting circuit-breakers for rated voltages above 52 kV
Standard number:IEC 62271-108:2020   language:English and French language
Release Date:08-Jul-2020   technical committee:SC 17A - Switching devices
Drafting committee:MT 31 - TC 17/SC 17A/MT 31   ICS number:01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION

IEC 62271-108
Edition 2.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 108: High-voltage alternating current disconnecting circuit-breakers for
rated voltages above 52 kV
Appareillage à haute tension –
Partie 108: Disjoncteurs-sectionneurs à courant alternatif à haute tension
de tensions assignées supérieures à 52 kV





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IEC 62271-108
Edition 2.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –

Part 108: High-voltage alternating current disconnecting circuit-breakers for

rated voltages above 52 kV
Appareillage à haute tension –

Partie 108: Disjoncteurs-sectionneurs à courant alternatif à haute tension

de tensions assignées supérieures à 52 kV

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.10 ISBN 978-2-8322-8507-7

– 2 – IEC 62271-108:2020 © IEC 2020
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
3.1 General terms and definitions . 7
3.2 Assemblies of switchgear and controlgear . 7
3.3 Parts of assemblies . 7
3.4 Switching devices . 7
3.5 Parts of switchgear and controlgear . 7
3.6 Operational characteristics of switchgear and controlgear . 7
3.7 Characteristic quantities . 8
3.8 Index of definitions . 8
4 Normal and special service conditions . 9
5 Ratings . 9
5.1 General . 9
5.3 Rated insulation level (U , U , U ) . 9
d p s
6 Design and construction . 9
6.1 General . 9
6.11 Nameplates. 9
6.12 Locking devices . 10
6.13 Position indication . 10
6.101 Requirements for simultaneity of poles during single closing and single
opening operations . 10
6.102 Operation of disconnecting circuit-breakers . 10
6.103 Pressure limits of fluids for operation . 10
6.104 Vent outlets . 10
6.105 Time quantities . 10
6.106 Static mechanical loads . 11
6.107 Disconnecting circuit-breaker classification . 11
6.108 Requirements in respect of the isolating distance of disconnecting circuit-
breakers . 11
7 Type tests . 11
7.1 General . 11
7.2 Dielectric tests . 11
7.3 Radio interference voltage (RIV) test . 11
7.4 Resistance measurement . 11
7.5 Continuous current tests . 11
7.6 Short-time withstand current and peak withstand current tests . 12
7.7 Verification of the protection . 12
7.8 Tightness tests . 12
7.9 Electromagnetic compatibility tests (EMC) . 12
7.10 Additional tests on auxiliary and control circuits . 12
7.11 X-radiation for vacuum interrupters . 12
7.101 Mechanical and environmental tests . 12
7.102 Miscellaneous provisions for making and breaking tests . 13
7.103 General considerations for making and breaking tests . 13

7.104 Demonstration of arcing times . 13
7.105 Short-circuit test quantities . 13
7.106 Short-circuit test procedure . 13
7.107 Terminal fault tests . 13
7.108 Additional short-circuit tests . 13
7.109 Short-line fault tests . 13
7.110 Out-of-phase making and breaking tests . 13
7.111 Capacitive current tests . 14
7.112 Tests to verify the proper function of the position indicating device . 14
7.113 Combined function test . 14
8 Routine tests . 18
8.1 General . 18
9 Guide to the selection of disconnecting circuit-breakers (informative) . 18
10 Information to be given with enquires, tenders and orders (informative) . 18
11 Transport, storage, installation, operation instructions and maintenance. 19
12 Safety . 19
13 Influence of the product on the environment . 19
Annex A (informative) Explanatory notes and examples of disconnecting circuit-
breakers . 20
Bibliography . 21

Figure 1 – Test sequence for mechanical operations and short-circuit combined
function tests when performed as separate tests . 15
Figure 2 – Test sequence for mechanical operations and short-circuit combined
function tests when performed in one sequence . 16
Figure A.1 – A making or breaking unit (or several identical units connected in series)
which satisfies the dielectric requirements of
...

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