Applies to assemblies used in electrical energy generation, transmission, distribution, and conversion.
, highlighting the responsibilities of the original manufacturer versus the assembly builder. Hager Guide : A detailed Guide to the New IEC 61439 Standard that explains the transition from the old 60439 series. Schneider Electric Blog : A useful overview of what the standards mean for equipment specifications , particularly the removal of the old TTA/PTTA categories. Major Changes to Note
Depending on the installation environment (e.g., dusty factories, outdoor locations, or clean server rooms), the enclosure must provide adequate protection against contact with live parts and the ingress of solids or liquids, rated via the IP code system. Forms of Internal Separation iec 614391 and 2 pdf
The older 60439 standard relied on "Type Tested" (TTA) vs. "Partially Type Tested" (PTTA) labels. The 61439 series replaced this with a more flexible yet stringent system. Eliminates ambiguity in testing. Increases responsibility for the "Original Manufacturer."
This method allows a manufacturer to validate a new variant by comparing it structured-form against a reference design that has already been physically tested. Strict mathematical derivation rules apply to ensure the variant does not compromise safety margins. 3. Verification by Assessment Applies to assemblies used in electrical energy generation,
These are particularly helpful as they highlight the changes between the old 60439 and the current 61439 standards.
Once the design framework is verified, every single completed panel leaving the workshop must undergo (previously known as routine testing). This guarantees that errors during assembly or wiring have not compromised the system integrity. Routine verification covers: Schneider Electric Blog : A useful overview of
: Checking wiring layout, IP protection rating, clearances, and labels.