IEC 62271-110:2012

IEC 62271-110 ®
Edition 3.0 2012-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 110: Inductive load switching

Appareillage à haute tension –
Partie 110: Manœuvre de charges inductives

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IEC 62271-110 ®
Edition 3.0 2012-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –

Part 110: Inductive load switching

Appareillage à haute tension –

Partie 110: Manœuvre de charges inductives

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 29.130.10 ISBN 978-2-83220-410-8

– 2 – 62271-110 © IEC:2012
CONTENTS
FOREWORD . 4
1 General . 6
1.1 Scope . 6
1.2 Normative references . 6
Normal and special service conditions . 6
3 Terms and definitions . 7
4 Ratings . 8
5 Design and construction . 8
6 Type tests . 8
6.1 General . 8
6.2 Dielectric tests . 9
6.3 Radio interference voltage (r.i.v.) test . 9
6.4 Measurement of the resistance of circuits . 9
6.5 Temperature-rise tests . 9
6.6 Short-time withstand current and peak withstand current tests . 9
6.7 Verification of protection . 9
6.8 Tightness tests . 9
6.9 Electromagnetic compatibility tests (EMC) . 9
Mechanical and environmental tests . 9
6.101
6.102 Miscellaneous provisions for making and breaking tests . 9
6.103 Test circuits for short-circuit making and breaking tests . 10
6.104 Short-circuit test quantities . 10
6.105 Short-circuit test procedure . 10
6.106 Basic short-circuit test-duties . 10
6.107 Critical current tests. 10
6.108 Single-phase and double-earth fault tests . 10
6.113 High-voltage motor current switching tests . 10
6.114 Shunt reactor current switching tests . 16
7 Routine tests . 27
8 Guide to selection of switchgear and controlgear . 27
9 Information to be given with enquiries, tenders and orders . 27
10 Transport, storage, installation, operation and maintenance . 27
11 Safety . 27
12 Influence of the product on the environment . 27
Annex A (normative) Calculation of t values . 29
Bibliography . 31

Figure 1 – Motor switching test circuit and summary of parameters . 12
Figure 2 – Illustration of voltage transients at interruption of inductive current for first
phase clearing in a three-phase non-effectively earthed circuit . 16
Figure 3 – Reactor switching test circuit − Three-phase test circuit for in-service load
circuit configurations 1 and 2 (Table 2) . 18
Figure 4 – Reactor switching test circuit − Single-phase test circuit for in-service load
circuit configurations 1, 2 and 4 (Table 2) . 19

62271-110 © IEC:2012 – 3 –
Figure 5 – Reactor switching test circuit − Three-phase test circuit for in-service load
circuit configuration 3 (Table 2) . 20
Figure 6 – Illustration of voltage transients at interruption of inductive current for a
single-phase test . 28

Table 1 – Test duties at motor current switching tests . 14
Table 2 – In-service load circuit configurations . 17
Table 3 – Standard values of prospective transient recovery voltages – Rated voltages
12 kV to 170 kV for effectively and non-effectively earthed systems – Switching shunt
reactors with isolated neutrals (Table 2: In-service load circuit configuration 1) . 21
Table 4 – Standard values of prospective transient recovery voltages – Rated voltages
100 kV to 1 200 kV for effectively earthed systems – Switching shunt reactors with

earthed neutrals (Table 2: In-service load circuit configuration 2). 22
Table 5 – Standard values of prospective transient recovery voltages – Rated voltages
12 kV to 52 kV for effectively and non-effectively earthed systems – Switching shunt
reactors with isolated neutrals (Table 2: In-service load circuit configuration 3) . 23
Table 6 – Standard values of prospective transient recovery voltages – Rated voltages
12 kV to 52 kV for effectively and non-effectively earthed systems – Switching shunt
reactors with earthed neutrals (Table 2: In-service load circuit configuration 4) . 23
Table 7 – Load circuit 1 test currents . 24
Table 8 – Load circuit 2 test currents . 24
Table 9 – Test duties for reactor current switching tests . 25

– 4 – 62271-110 © IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 110: Inductive load switching

FOREWORD
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...