What is the difference between IEC 61439 and 60439?

The field of electrical engineering encompasses a wide range of standards and regulations that govern the design and performance of electrical installations. In this article, we will explore the key differences between two important standards - IEC 61439 and 60439.

IEC 61439: The New Standard

IEC 61439 is the latest international standard for low-voltage switchgear and control gear assemblies. Introduced in 2009, it replaced the earlier IEC 60439 standard. This new standard was developed to enhance the safety, reliability, and efficiency of electrical systems.

IEC 61439 focuses on several important aspects, including:

Clear Classification: The new standard introduces a clear distinction between Type Tested Assemblies (TTA), Partially Type Tested Assemblies (PTTA), and Constructed Assemblies (CA). This facilitates easier selection and comparison of different assembly types for specific applications.

Verification of Performance: IEC 61439 requires that all assemblies undergo tests to ensure their performance under various conditions. This verification process involves testing for temperature rise, short-circuit withstand capability, and degree of protection.

Improvements in Design: The new standard promotes improved internal separation, busbar design, and insulation coordination to minimize the risk of electrical faults. Additionally, it emphasizes the importance of proper connection and labeling of components.

IEC 60439: The Previous Standard

Prior to the introduction of IEC 61439, the industry relied on IEC 60439 as the standard for low-voltage switchgear and control gear assemblies. While no longer in use, it is still important to understand the key features of this previous standard.

IEC 60439-1 provided general guidelines for construction and testing of low-voltage switchgear assemblies, but it did not provide as detailed requirements and standardized design options as IEC 61439. This allowed for more flexibility but also increased the risk of inconsistent performance and safety hazards.

Conclusion

The transition from IEC 60439 to 61439 represents a significant improvement in the field of electrical engineering. The new standard, IEC 61439, provides clearer classification, stringent performance verification, and better design guidelines. Its focus on safety, reliability, and efficiency ensures that electrical installations meet the highest industry standards. Engineers and practitioners should familiarize themselves with IEC 61439 to ensure compliance and enhance the performance of their electrical systems.