First, a quick clarification: The keyword "iec 61439-39 pdf free download" contains a typo—there is no IEC 61439-39. The correct reference is . The "3" refers to Part 3 of the IEC 61439 series.
Without adhering to this standard, a distribution board could be a fire hazard or a shock risk. This is why even students and hobbyists seek the document.
Using mathematical formulas to predict performance, such as temperature rise.
Yes. That is the primary purpose. Any consumer unit (fuse box, breaker panel) sold in Europe or IEC-following countries must comply with this standard.
Only if the university has paid for a "campus-wide license" (rare). If the professor downloaded it individually, sharing it violates the license agreement.