IEC TR 60890 is a Technical Report (TR) published by the International Electrotechnical Commission (IEC). It provides a calculation method used to verify the temperature rise of low-voltage switchgear and controlgear assemblies (often referred to as ASSEMBLIES or panels).
Instead of performing a physical, destructive temperature rise test (which is expensive and time-consuming), manufacturers can use the calculation methods outlined in this document to prove that their assembly design will not overheat under specific operating conditions.
Given:
Steps:
Result: Internal air temperature ≈ 40°C (ambient) + 27 K = 67°C → acceptable for most devices. iec tr 60890 pdf
| Method | Accuracy | Cost | Time | Input Data Required | Best For | |--------|----------|------|------|---------------------|----------| | Full test (IEC 61439-1 Annex B) | High | $$$$ ($5k-20k) | Weeks | Prototype, measurement setup | Final certification, high-risk designs | | TR 60890 (enclosure method) | Medium ( ±20%) | $ (PDF only) | Hours | Component losses, dimensions | Routine designs, early estimates | | CFD simulation | High | $$ (software license) | Days to weeks | Full 3D model, thermal properties | Complex non-standard enclosures | | Rule of thumb (over-engineering) | Low | Free | Minutes | None | Simple, low-density panels |
Absolutely. For engineers and panel builders, the IEC TR 60890 PDF is a tool that pays for itself on the first project. It eliminates guesswork, reduces the need for costly prototypes, and provides a defensible, standardized method for temperature rise assessment. IEC TR 60890 is a Technical Report (TR)
While you must obtain it legally from the IEC or a national body, the cost is minimal compared to the liability of an overheated switchboard. Whether you are designing a distribution board for a hospital or a control panel for a factory, this technical report is an essential reference for safe, compliant, and efficient design.
Final Action Step: Visit the IEC Webstore today, search for "IEC TR 60890:2014+AMD1:2017 CSV," and secure your legitimate copy. Then, download the calculation spreadsheets (available from various third-party engineering sites) to automate the process. Do not rely on free, illegal copies—your career and your clients' safety depend on accuracy and compliance. Steps:
Disclaimer: This article is for informational purposes. Always refer to the official IEC TR 60890 PDF for exact formulas and tables. The author is not liable for any engineering decisions made based on this summary.
The document typically covers:
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