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The standard provides a clear matrix (Table D.1) detailing which verification methods are permissible for each of the 13 core performance characteristics. 13 Core Verification Characteristics
: Applicable to assemblies with rated voltages up to 1000 V AC or 1500 V DC . Best Practices for Implementation iec 614391 standard pdf best
There is no "Part 391." The correct search should be or IEC 61439-2 . The standard provides a clear matrix (Table D
: Direct physical testing in a laboratory environment. such as PIMA :
IEC 61439-1 establishes the general requirements for all low-voltage assemblies (up to 1000 V AC or 1500 V DC). It is not a standalone product standard; rather, it provides the general rules that are cited by specific product parts in the series, such as PIMA :