This is the "umbrella" standard. It contains all the general definitions, service conditions, construction requirements, performance characteristics, and verification methods that apply to any type of low-voltage assembly (up to 1,000 V AC or 1,500 V DC).
The assembly or its parts are subjected to physical destructive or non-destructive tests in a laboratory (e.g., short-circuit tests, temperature rise tests).
For electrical engineers, panel builders, and maintenance professionals, the standard is the definitive benchmark for low-voltage switchgear and controlgear assemblies. However, a common and highly specific search query— "iec 614391 and 2 pdf" (often a typographical compression of "IEC 61439-1 and 2 PDF")—reveals a critical need: users want the complete set of the two foundational parts of this standard in a portable document format.
Testing of mechanical operation (interlocks, doors, handles).
This is not a standalone product standard. It provides the definitions, service conditions, and technical characteristics (like voltage and current ratings) that all other parts of the series refer to. iec 614391 and 2 pdf
Ensures insulation can handle operating voltages and lightning impulses.
Assemblies must withstand mechanical impacts, thermal stresses, and corrosion.
Do you need assistance understanding a specific (like temperature rise or short-circuit limits)?
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This is the specific product standard for "PSC-assemblies" (often called switchboards or panelboards). It details the construction and performance criteria for power distribution systems. Key Technical Requirements
The most significant change from the historic IEC 60439 to the modern IEC 61439 standard was the elimination of the categories (Type-Tested Assemblies) and PTA (Partially Type-Tested Assemblies).
(General Rules): Available at the IEC Webstore .
When handling the "PDF" or technical file for a project, ensure it includes: This is not a standalone product standard
Suitability of connection points for incoming and outgoing cables. Performance Requirements:
IEC 61439-2: Power Switchgear and Controlgear (PSC) Assemblies
This part provides the common definitions, service conditions, and technical requirements applicable to all types of assemblies. It is not a standalone product standard and must be used in conjunction with a specific product part.