Overview
IEC TS 63107:2020 addresses the integration and testing of internal arc-fault mitigation systems (IAMS) within low-voltage power switchgear and controlgear assemblies (PSC-assemblies) according to IEC 61439-2. This technical specification, published by the International Electrotechnical Commission (IEC), sets out the requirements for the correct integration and verification of IAMS to ensure proper functioning in practical applications. IEC TS 63107:2020 is designed to be used in conjunction with IEC 61439-1 and IEC 61439-2, and references additional device-specific standards for components such as arc quenching devices (AQD) and arc-fault control devices (IACD).
While this specification focuses on the correct operation of IAMS within PSC-assemblies, it does not directly address personnel safety or damage to the assemblies-these concerns are the focus of IEC TR 61641.
Key Topics
- System Components: Defines IAMS as comprising internal arc-fault control devices (IACD) and internal arc-fault reduction devices (IARD), which detect and mitigate internal arc-faults in PSC-assemblies.
- Integration Requirements: Details how to integrate IAMS components into PSC-assemblies, including the selection, quantity, and placement of sensors.
- Testing and Verification: Establishes procedures to verify correct operation-such as detecting arc-faults, avoiding unintended activation, and ensuring effective mitigation.
- Design and Construction: Addresses considerations for device selection, installation, and the necessary documentation to support integration and future maintenance.
- System Performance: Requires verification under normal and specific conditions, including immediate post-energization scenarios.
- Guidance for Users and Manufacturers: Annexes provide advice for both users (specifying PSC-assemblies with IAMS) and original manufacturers (integration best practices).
Applications
IEC TS 63107:2020 is highly relevant for manufacturers, assemblers, and users of low-voltage switchgear and controlgear assemblies seeking to incorporate arc-fault detection and mitigation capabilities. Its practical value includes:
- Enhanced Equipment Resilience: Integrating IAMS can reduce damage to PSC-assemblies following an internal arc-fault, supporting rapid recovery and improved uptime.
- Reliability in Operation: Proper testing ensures that IAMS will not trigger unnecessarily due to normal switching operations, minimizing the risk of service interruptions.
- Optimization of Protection: By specifying protected areas and tailored mitigation strategies, PSC-assemblies can be customized to meet end-user needs or installation requirements.
- Maintenance and Restoration: Clear instructions on handling, maintenance, and restoring IAMS after activation help ensure long-term reliability and reduce technical uncertainty for operators and service technicians.
- Component Compatibility: The standard reinforces the need for all IAMS components (IACD, IARD, AQD) to meet their own product standards, ensuring system interoperability and compliance.
Related Standards
IEC TS 63107:2020 is part of a family of international standards governing power switchgear and controlgear assemblies and associated protection systems. Key related standards include:
- IEC 61439-1: General rules for low-voltage switchgear and controlgear assemblies.
- IEC 61439-2: Specific requirements for power switchgear and controlgear assemblies (PSC-assemblies).
- IEC 60947-9-1: Product standard for arc quenching devices (AQD).
- IEC 60947-9-2: Standard for optical-based arc-fault detection and mitigation devices (IACD).
- IEC TR 61641: Testing for enclosed low-voltage assemblies under arcing due to internal faults, focusing on personnel safety and damage mitigation.
- IEC 60947-2: Standards for short-circuit protective devices (SCPD).
- IEC 62606: Arc fault detection devices (not within the scope of IEC TS 63107).
Professionals involved in the design, integration, or specification of arc-fault mitigation systems should familiarize themselves with IEC TS 63107:2020 and its referenced standards to ensure full compliance and optimal protection in low-voltage PSC-assemblies.
Open preview (PDF)Integration of internal arc-fault mitigation systems in power switchgear and controlgear assemblies (PSC‑Assemblies) according to IEC 61439-2
