The standard exists to ensure that electrical assemblies are safe for operators, resilient in harsh environments, and capable of functioning predictably under varying electrical loads. Transitioning from the Old IEC 60439 Standard
A: Throughout the document, "assembly" refers specifically to a low-voltage switchgear and controlgear assembly that incorporates devices and self-contained components.
The IEC 61439 series is a set of international standards that specify the safety and performance requirements for low-voltage switchgear and controlgear assemblies. This new series was introduced to harmonize and replace the older IEC 60439 series, bringing a clearer, more risk-based approach to the industry.
The change from the series to the IEC 61439 series was not just an update; it was a complete structural overhaul that brought the standards into the modern era. Key differences between the two systems are highlighted below: iec 61439-1 standard pdf
Official and authorized sources to purchase and download the standard include:
The IEC 61439-1 standard, "Low-voltage switchgear and controlgear assemblies – Part 1: General rules," establishes the foundational safety and performance requirements for low-voltage electrical systems. It replaces the older IEC 60439 series, moving to a unified "design verification" approach involving testing, comparison, or assessment, rather than the previous TTA/PTTA classification. For more information, read the guide at
Under the current standard, an assembly is either verified or not verified. The standard divides engineering responsibilities between two roles: The standard exists to ensure that electrical assemblies
Assures that moving parts, locks, interlocks, and drawers operate reliably over their intended lifespan. 5. Routine Verification: The Final Quality Check
: Power switchgear and controlgear assemblies (PSC-assemblies)
What will it be installed in (e.g., industrial, residential, construction site)? This new series was introduced to harmonize and
Assemblies for power distribution in public networks IEC 61439-6: Busbar trunking systems (busways)
Global electrical manufacturers publish free, detailed whitepapers and engineering guides based on the IEC 61439-1 text to help builders comply with the regulations.
As the foundation of the series, is the most widely referenced document. It cannot be used alone to specify or determine the conformity of an assembly, but it must be used together with the relevant "Part 2" standard (e.g., IEC 61439-2 for power switchgear).
It minimizes the risk of power outages caused by structural or electrical failure inside the enclosure. Key Verification Methods