What Mills Get Wrong When Sourcing an EMI Filter Supplier for High-Current Drives
Mills running heavy three-phase motor drives often source filters based on voltage and current alone, without checking whether the filter’s emission class actually matches the installation environment. A part rated for one classification can pass bench testing and still cause interference once installed near sensitive control equipment. This piece explains what an EMI filter supplier actually needs to account for at high current levels, using BLA Etech’s BL359-320-B, a 480VAC/320A three-phase filter built for heavy industrial loads, as the reference point, and why mills running aging equipment alongside newer automation need to revisit filter selection rather than assuming legacy specs still apply.
