Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: EN IEC 60947-9-1:2019
• Năm ban hành / Publication date: 2019
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Low-voltage switchgear and controlgear - Part 9-1: Active arc-fault mitigation systems - Arc quenching devices
• Phạm vi áp dụng / Scope of standard: 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 lowvoltage 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: • sensors intended to detect arc-faults; • devices intended to trigger the functioning of the arc quenching device; • devices intended to interrupt arc-fault current; • special requirements for AQDs for use in explosive atmospheres (e.g. ATEX).