Skip to Main Content
This article deals with the selection of low-voltage motors for hazardous areas when supplied by frequency converter. When the ATmosphere Explosive (ATEX) Directives were released in 2003, the only clear point was that ex motors with converter supply had to be safe. Otherwise, the requirements in relevant standards were different for the motors depending on the protection type or voltage, and also, the installation standard was adding new guidelines. In addition, each country had its own history and practices, which confuse the end users and manufacturers. These ATEX Directives are the first attempt to harmonize the rules with respect to the past and the actual installed base.
Date of Publication: November-December 2008