Under IEC 61439, the Assembly Manufacturer must provide:
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.
How to read them together:
Searching for an "iec 614391 and 2 pdf" without understanding this relationship leads to confusion. You need both files open side-by-side.
IEC 61439-1 is the foundation. It defines the common rules, definitions, and service conditions for all low-voltage switchgear assemblies. iec 614391 and 2 pdf
Key topics covered in Part 1:
Bottom line for Part 1: You cannot understand any other part without first reading Part 1. It sets the vocabulary and general test philosophy.
To understand the importance of the new standard, one must look back. The old IEC 60439 series had a fundamental flaw: it allowed "design verification" to be separated from "individual testing" in a way that created loopholes.
The biggest change is the shift from a design-constrained approach to a performance-based approach. Under IEC 60439, there was a concept of "Type-tested assemblies" (TTA) vs. "Partially type-tested assemblies" (PTTA). PTTA assemblies were often poorly verified. Under IEC 61439, the Assembly Manufacturer must provide:
IEC 61439 eliminates the PTTA concept entirely. Every assembly must now be verified against a defined set of performance characteristics (rated current, short-circuit withstand, insulation coordination, etc.) using one of three methods:
This is why the IEC 61439-1 and -2 PDF is so valuable—it contains the detailed test sequences, acceptance criteria, and temperature rise limits that were not fully codified in the older standard.
Using an unauthorized PDF for commercial panel design or certification (e.g., CE, UKCA, or CCC marking) is risky. Auditors and certification bodies (like TÜV, UL, or DEKRA) require proof that you referenced the official, current edition (which as of 2024 is Edition 2 or 3 for most parts). An outdated or bootlegged PDF may lead to non-compliance and liability.
While Part 1 provides the "constitution," Part 2 provides the "laws" specifically for power switchgear (typical applications: main distribution boards, motor control centers, industrial panels). Searching for an "iec 614391 and 2 pdf"
Searching for "IEC 61439-1 and 2 PDF" is a common starting point for electrical engineers, panel builders, and maintenance technicians. If you’ve typed that phrase, you likely need the official rules for designing, testing, or certifying low-voltage switchgear and controlgear assemblies (e.g., distribution boards, motor control centers, and main switchboards).
Let’s cut through the noise: What do these two parts cover? Why are they separate? And where can you legitimately access them?
Every assembly leaving the factory must undergo: