is the foundation. It defines the common rules, definitions, and service conditions for all low-voltage switchgear assemblies.
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." iec 614391 and 2 pdf
One of the most significant reasons to study the IEC 61439-1 and 2 PDF is to understand the process. The standard identifies three equivalent methods to verify a design: is the foundation
You cannot understand any other part without first reading Part 1. It sets the vocabulary and general test philosophy. "Partially Type Tested" (PTTA) labels
Understanding the hierarchy is crucial. IEC 61439-1 contains the "umbrella" requirements that apply to all types of assemblies. IEC 61439-2 then contains clauses that modify, replace, or add to Part 1 specifically for power switchgear.