When you open your legal IEC 61439-1 and -2 PDF, here is the critical content you will find:
The standard is periodically revised. As of early 2025, the most current versions are:
When searching for an "iec 614391 and 2 pdf" , ensure the edition date matches the latest version. Using a 2011 (Edition 2) PDF for a new project would result in non-compliance.
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.
| Aspect | IEC 61439-1 | IEC 61439-2 | |--------|-------------|-------------| | Role | General rules | Specifics for power assemblies | | Rated current | Not defined | Up to 6300A typical (unlimited by standard) | | Forms of separation | Defined (Form 1 to 4b) | Mandatory specification | | Withdrawable / removable parts | General requirements | Specific tests for locking, position indication | | Internal separation (busbars, functional units) | Basic principles | Detailed requirements for compartmentalization | | Example applications | All assemblies | Main switchboards, MCCs, distribution boards | When you open your legal IEC 61439-1 and
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.
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: When searching for an "iec 614391 and 2
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.