Intelligent motor management

A motor soft starter is a device used with AC electrical motors to temporarily reduce the load and torque in the power train and electric current surge of the motor during start-up. This reduces the mechanical stress on the motor and shaft, as well as the electrodynamic stresses on the attached power cables and electrical distribution network, extending the lifespan of the system.

Features (depending on model)
  • Kick-start (starting torque boost)
  • Constant current limit
  • Current ramp (for variable loads)
  • Reverse rotation with low torque
  • DC current braking
  • Coast stop
  • Prolonged soft-stop ramp
  • Soft braking in reverse with external contactor
  • Two or three-wire operation
  • Programmable relays
  • Fieldbus options for Profibus ® DP, DeviceNet ® and Modbus ® RTU
  • Version -L: control voltage 24V (DC/AC)
  • Version -H: control voltage 110 ... 240 V AC and 380 ... 440V AC
  • Optional I / O-module to monitor external signals such as temperature, feed pressure, over / under-pressure or additional signals from a PLC
  • Remote control (option)


Machine and plant building, pumps and fans, conveyors, HVAC building automation, torque controlled drives