It does not always has to be a frequency inverter if you require a moderate run-up and run-down time. Modern switches switch soft, have a torque setting, reverse, has an inegrated monitor for the motor temperature, a relay for the motor brake and report every disturbance to the conrol system. All of it for 400 V and the control signals through 24 V or a field-bus-system.
This electronical motor starter MONO-Switch switch only one three-phase asynchonous motor or a single-phase motor on and off. The MONO-Switch is available from 0.09KW to 3KW
