General requirements (Part 1)
Specification of rated ambient temperatures, humidity levels, pollution degrees, and altitude limits. Electrical Characteristics: Defining rated voltage ( Uncap U sub n ), rated insulation voltage ( Uicap U sub i ), rated impulse withstand voltage ( Uimpcap U sub i m p end-sub ), and rated currents ( Incap I sub n
Part 1 of the standard dictates the mandatory requirements for all assemblies.
: Verifying that field cables can be safely connected and terminated. Performance Characteristics iec 614391 and 2 pdf
The IEC 61439 series is structured as a base standard paired with product-specific parts. You cannot use Part 2 without referencing Part 1.
: Testing the continuity of the protective earth grounding circuit. Summary Checklist for Compliance Responsible Party Key Actions Required Design Original Manufacturer Lab testing, calculation, comparison against 12 attributes. Production Assembly Manufacturer
In practical terms, this means:
IEC 61439-1 and IEC 61439-2 are important standards for low-voltage power distribution systems. By understanding the requirements of these standards, manufacturers, users, and regulators can ensure that low-voltage power distribution systems are designed, constructed, and tested to meet safety, performance, and environmental requirements.
While Design Verification is done once by the Original Manufacturer, must be performed by the Assembly Manufacturer on every single completed panel before it leaves the workshop.
The International Electrotechnical Commission (IEC) developed the IEC 61439 series to replace the older, ambiguous IEC 60439 standard. The older framework relied heavily on the concepts of "Type-Tested Assemblies" (TTA) and "Partially Type-Tested Assemblies" (PTTA). This created confusion in the market regarding what actually constituted a fully verified panel. General requirements (Part 1) Specification of rated ambient
The latest 2020 edition of Part 2 represents a significant technical revision over the 2011 version and remains current today. Key changes include clarifications on the design verification process, updates to internal separation requirements, and the introduction of detailed annexes for specific applications, such as assemblies used in photovoltaic (PV) installations (Annex DD). Compliance with IEC 61439-2 also forms part of the requirement for affixing the CE mark, where applicable.
Resistance to dust, solid objects, and water ingress.
Power-frequency withstand voltage tests and impulse withstand voltage tests. where applicable. Resistance to dust