One of the most significant shifts from the older standards is the removal of the distinction between TTA (Type Tested Assemblies) PTTA (Partially Type Tested Assemblies) Under IEC 61439, this has been replaced by a rigorous Verification approach. There are now three ways to verify compliance: Verification by Testing: Physical laboratory tests. Verification by Calculation/Comparison:
Part 2 works in conjunction with Part 1. It provides specific requirements for power switchgear assemblies (PSC-assemblies) intended for distribution of electrical energy. These are the typical main low-voltage switchboards found in industrial plants, commercial buildings, and utility substations. Iec 61439-1 And 2 Pdf
The IEC 61439 series offers several benefits to the electrical industry, including: One of the most significant shifts from the
For those interested in learning more about IEC 61439-1 and 2, several resources are available: Why It Matters IEC 61439-2 - Legrand Group
: The "Product Standard" specifically for power switchgear and controlgear assemblies (PSC-assemblies). Why It Matters IEC 61439-2 - Legrand Group
✅ Safety First: Ensures proper thermal withstand, insulation, and temperature rise limits. ✅ Reliability: Guarantees assemblies can handle short-circuit stresses. ✅ Compliance: Mandatory for CE marking and many global certifications.
This part defines the specific requirements for power switchgear assemblies (often called PSC-assemblies). It covers equipment used for the distribution and control of energy for all types of loads. Schneider Electric Blog Key Changes: Moving Beyond "Type Tested"