Motor protection switch complete device (basic device and electronic trip unit) according to IEC60947-4-1, electronic wide-range overload protection (4:1), phase failure and asymmetry protection, adjustable trip class, high short-circuit breaking capacity, isolating function. Flexible adjustment of the current range through exchangeable electronic trip units. Can be expanded with auxiliary switch, voltage release, current limiter, door coupling handles. World market device, ATEX approval