IEC 60947-9-1:2019

IEC 60947-9-1 ®
Edition 1.0 2019-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switchgear and controlgear –
Part 9-1: Active arc-fault mitigation systems – Arc quenching devices

Appareillage à basse tension –
Partie 9-1: Systèmes actifs de limitation des défauts d'arc – Dispositifs
d'extinction d'arc
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IEC 60947-9-1 ®
Edition 1.0 2019-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switchgear and controlgear –

Part 9-1: Active arc-fault mitigation systems – Arc quenching devices

Appareillage à basse tension –

Partie 9-1: Systèmes actifs de limitation des défauts d'arc – Dispositifs

d'extinction d'arc
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.40; 29.130.20 ISBN 978-2-8322-6404-1

– 2 – IEC 60947-9-1:2019 © IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Classification . 8
4.1 According to the number of operations . 8
4.1.1 Single shot AQD . 8
4.1.2 Resettable AQD . 9
4.2 According to the mounting characteristics . 9
4.2.1 Fixed AQD . 9
4.2.2 Withdrawable or plug-in AQD . 9
5 Characteristics . 9
5.1 Rated operational voltage (U ) . 9
e
5.2 Rated insulation voltage (U ) . 9
i
5.3 Rated impulse withstand voltage (U ) . 9
imp
5.4 Rated short-time withstand current (I ) . 9
cw
5.5 Maximum voltage drop in low-impedance state . 9
5.6 Maximum operating time . 10
5.7 Number of operating cycles (of a resettable AQD) . 10
5.8 Maximum permissible temperature of the AQD main circuit terminals . 10
6 Product information . 10
6.1 Nature of information . 10
6.2 Marking . 10
6.3 Instructions for installation, operation, maintenance, decommissioning and
dismantling . 11
7 Normal service, mounting and transport conditions . 11
8 Constructional and performance requirements . 11
8.1 Constructional requirements . 11
8.2 Performance requirements . 12
8.3 Electromagnetic compatibility (EMC) . 12
9 Tests . 13
9.1 Kind of tests . 13
9.2 Compliance with constructional requirements . 13
9.3 Type tests . 13
9.3.1 Performance tests . 13
9.3.2 Electromagnetic compatibility tests . 15
9.4 Routine tests. 16
9.4.1 Closing operation. 16
9.4.2 Dielectric test . 16

Annex A (informative) Rationale for defining the maximum voltage drop value in low-
impedance state . 17
A.1 Condition for arc extinction . 17
A.2 Determination of minimum distance and corresponding voltage drop . 18
Bibliography . 19

Table 1 – Product information . 11

– 4 – IEC 60947-9-1:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 9-1: Active arc-fault mitigation systems –
Arc quenching devices
FOREWORD
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