IEC 62271-103:2021

High-voltage switchgear and controlgear - Part 103: Alternating current switches for rated voltages above 1 kV up to and including 52 kV

IEC 62271-103:2021

Name:IEC 62271-103:2021   Standard name:High-voltage switchgear and controlgear - Part 103: Alternating current switches for rated voltages above 1 kV up to and including 52 kV
Standard number:IEC 62271-103:2021   language:English and French language
Release Date:10-May-2021   technical committee:SC 17A - Switching devices
Drafting committee:MT 45 - TC 17/SC 17A/MT 45   ICS number:29.130.10 - High voltage switchgear and controlgear

IEC 62271-103
Edition 2.0 2021-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-voltage switchgear and controlgear –
Part 103: Alternating current switches for rated voltages above 1 kV up to and
including 52 kV
Appareillage à haute tension –
Partie 103: Interrupteurs à courant alternatif pour tensions assignées
supérieures à 1 kV et inférieures ou égales à 52 kV





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IEC 62271-103
Edition 2.0 2021-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-voltage switchgear and controlgear –

Part 103: Alternating current switches for rated voltages above 1 kV up to and

including 52 kV
Appareillage à haute tension –

Partie 103: Interrupteurs à courant alternatif pour tensions assignées

supérieures à 1 kV et inférieures ou égales à 52 kV

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.10 ISBN 978-2-8322-9770-4

– 2 – IEC 62271-103:2021 © IEC 2021
CONTENTS
FOREWORD . 8
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
3.1 General terms and definitions . 11
3.2 Assemblies of switchgear and controlgear . 11
3.3 Parts of assemblies . 11
3.4 Switching devices . 12
3.5 Parts of switchgear and controlgear . 12
3.6 Operational characteristics of switchgear and controlgear . 13
3.7 Characteristic quantities . 13
3.8 Index of definitions . 17
4 Normal and special service conditions . 18
5 Ratings . 18
5.1 General . 18
5.2 Rated voltage (U ) . 18
r
5.3 Rated insulation level (U , U , U ) . 18
d p s
5.4 Rated frequency (f ) . 18
r
5.5 Rated continuous current (I ) . 18
r
5.6 Rated short-time withstand current (I ) . 19
k
5.7 Rated peak withstand current (I ) . 19
p
5.8 Rated duration of short-circuit (t ) . 19
k
5.9 Rated supply voltage of auxiliary circuits and control circuits (U ) . 19
a
5.10 Rated supply frequency of auxiliary and control circuits . 19
5.11 Rated pressure of compressed gas supply for controlled pressure systems . 19
5.101 Rated mainly active load-breaking current (I ) . 19
load
5.102 Rated closed-loop breaking current (I ) . 19
loop
5.103 Rated parallel power transformer breaking current for special purpose
switches (I ) . 19
pptr
5.104 Rated cable-charging breaking current (I ) . 19
cc
5.105 Rated line-charging breaking current (I ) . 19
lc
5.106 Rated single capacitor bank breaking current for special purpose switches
(I ) . 20
sb
5.107 Rated back-to-back capacitor bank breaking current for special purpose
switches (I ) . 20
bb
5.108 Rated back-to-back capacitor bank inrush making current for special
purpose switches (I ) . 20
in
5.109 Rated earth fault breaking current (I ) . 20
ef1
5.110 Rated cable- and line-charging breaking current under earth fault conditions
(I ) . 20
ef2
5.111 Rated motor breaking current for special purpose switches (I ) . 20
mot
5.112 Rated short-circuit making current (I ) . 21
ma
5.113 Types of switches and their associated ratings . 21

5.113.1 Types of switches . 21
5.113.2 Rated making and breaking currents for general purpose switches . 21
5.113.3 Rated making and breaking currents for limited purpose switches . 22
5.113.4 Rated making and breaking currents for special purpose switches . 22
5.113.5 Ratings for switches backed by fuses . 22
5.114 Mechanical endurance class of switches . 23
5.114.1 Class M1 switch . 23
5.114.2 Class M2 switch . 23
5.115 Electrical endurance class of general purpose switches . 23
5.115.1 Class E1 general purpose switch . 23
5.115.2 Class E2 general purpose switch . 23
5.115.3 Class E3 general purpose switch . 23
5.116 Capacitive breaking capability class of switches . 23
5.116.1 General . 23
5.116.2 Class C1 switch . 23
5.116.3 Class C2 switch . 24
6 Design and construction . 24
6.1 Requirements for liquids in switchgear and controlgear . 24
6.2 Requirements for gases in switchgear and controlgear . 24
6.3 Earthing of switchgear and controlgear . 24
6.4 Auxiliary and control equipment and circuits . 24
6.5 Dependent power operation . 24
6.6 Stored energy operation . 24
6.7 Independent unlatched operation (independent manual or power operation) . 24
6.8 Manually operated actuators . 24
6.9 Operation of releases . 24
6.10 Pressure/level indication . 24
6.11 Nameplates. 25
6.11.1 General . 25
6.11.2 Application . 25
6.12 Locking devices . 27
6.13 Position indication .
...

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