A specialized version that highlights changes between the 2003 and 2021 editions. VDE Verlag Preview Academic Discount Students and faculty can often get a 50% discount through their university. The full 2021 standard is available for roughly on major standard stores. IEC Webstore Summary of Noise Limit Requirements

The search for "iec 60034-9 pdf free download" is understandable. Standards are expensive, and budgets are tight. However, the cost of a non-compliant motor—failed audit, OSHA fine, worker injury lawsuit—is far higher than the price of the document.

While the 2021 edition moved some converter supply info to an informative annex, noise increments caused by variable frequency drives (VFDs) are a major focus for modern installations. Testing Conditions:

The standard applies to standard AC or DC rotating electrical machines with the following characteristics: Rated output from 1 kW up to 5,500 kW . Speed: Rated speeds not exceeding 3,750 min⁻¹ (rpm).

Machines must be tested at rated voltage and frequency to be compliant. iTeh Standards maximum noise levels allowed for a specific motor size or speed? Further Exploration