BS EN IEC 60947-9-1:2019
$142.49
Low-voltage switchgear and controlgear – Active arc-fault mitigation systems. Arc quenching devices
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 28 |
This part of IEC 60947 covers low-voltage arc quenching devices, hereinafter referred to as AQDs, which are intended to eliminate arc-faults in low-voltage assemblies (typically low-voltage switchgear and controlgear assemblies in accordance with the IEC 61439 series), by creating a lower impedance current path, to cause the arcing current to transfer to the new current path. This new current path is maintained until a short-circuit protection device (SCPD) interrupts the short-circuit current.
AQDs are installed in low-voltage assemblies, connected to the main circuit, preferably as close as possible to all primary power sources.
Their rated voltage does not exceed 1 000 V AC or 1 500 V DC. This document does not cover:
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sensors intended to detect arc-faults;
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devices intended to trigger the functioning of the arc quenching device;
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devices intended to interrupt arc-fault current;
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special requirements for AQDs for use in explosive atmospheres (e.g. ATEX).
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 5 | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications |
| 9 | English CONTENTS |
| 11 | FOREWORD |
| 13 | INTRODUCTION |
| 14 | 1 Scope 2 Normative references |
| 15 | 3 Terms and definitions 4 Classification 4.1 According to the number of operations 4.1.1 Single shot AQD |
| 16 | 4.1.2 Resettable AQD 4.2 According to the mounting characteristics 4.2.1 Fixed AQD 4.2.2 Withdrawable or plug-in AQD 5 Characteristics 5.1 Rated operational voltage (Ue) 5.2 Rated insulation voltage (Ui) 5.3 Rated impulse withstand voltage (Uimp) 5.4 Rated short-time withstand current (Icw) 5.5 Maximum voltage drop in low-impedance state |
| 17 | 5.6 Maximum operating time 5.7 Number of operating cycles (of a resettable AQD) 5.8 Maximum permissible temperature of the AQD main circuit terminals 6 Product information 6.1 Nature of information 6.2 Marking |
| 18 | 6.3 Instructions for installation, operation, maintenance, decommissioning and dismantling 7 Normal service, mounting and transport conditions 8 Constructional and performance requirements 8.1 Constructional requirements Table 1 – Product information |
| 19 | 8.2 Performance requirements 8.3 Electromagnetic compatibility (EMC) |
| 20 | 9 Tests 9.1 Kind of tests 9.2 Compliance with constructional requirements 9.3 Type tests 9.3.1 Performance tests |
| 22 | 9.3.2 Electromagnetic compatibility tests |
| 23 | 9.4 Routine tests 9.4.1 Closing operation 9.4.2 Dielectric test |
| 24 | Annex A (informative)Rationale for defining the maximum voltage drop valuein low-impedance state A.1 Condition for arc extinction |
| 25 | A.2 Determination of minimum distance and corresponding voltage drop |
| 26 | Bibliography |
