The design is verified through the strict application of calculations and design rules, including safety margins. For example, temperature rise can be verified via assessment using simple calculation models if the total current is low (typically under 630 A). 4. Crucial Technical Requirements in Parts 1 and 2
: Power Switchgear and Controlgear Assemblies (PSC-Assemblies) (The specific product standard for main distribution boards, sub-distribution panels, and motor control centers). IEC 61439-1: The Foundational General Rules
: Proving the copper busbars and structural framing can survive the massive electromagnetic forces generated during a short circuit. iec 614391 and 2 pdf
Complete Guide to IEC 61439-1 and -2: Standards for Low-Voltage Switchgear and Controlgear Assemblies
Includes additional requirements for internal separation (Forms 1 to 4) to protect operators and equipment. Schneider Electric Blog IEC 61439-1:2020 - Standard | IECEE The design is verified through the strict application
If the Assembly Manufacturer deviates from the Original Manufacturer’s explicit instructions (e.g., substituting a different brand of circuit breaker or changing busbar geometry without approval), they become the de facto Original Manufacturer. This means they inherit full responsibility for performing expensive laboratory design verifications themselves. The 13 Design Verification Checks
IEC 61439 is a series of standards that replaces the older IEC 60439, which was first published in 1970. The new series, published in 2008, comprises several parts, with IEC 61439-1 and 2 being the most relevant. These standards outline the requirements for low-voltage switchgear assemblies, which are essential components in electrical distribution systems. Crucial Technical Requirements in Parts 1 and 2
Compliance with IEC 61439-1 and IEC 61439-2 offers several benefits, including: