Soft start and soft stop

Soft start and soft stop overview

Soft start and soft stop overview

The soft start and soft stop devices of SoftCompact® and LEKTROMIK® families in an overview


SoftCompact® AM, SM

Start attentuation (AM) and soft starters (SM, SM2)
0,5 – 7,5 kW

  • AMStart attenuation with bridging relay
    SMSoft start with bridging relay for single-phase capacitor motors
    SM2Soft start with bridging relay and soft stop
  • Switch-on torque and run-up voltage ramp separately adjustable
  • Module housing for mounting on 35 mm DIN rails. Very compact version with a width of 45 mm.
  • Terminals and potentiometers are well protected against accidental contact
  • Easily retrofitted
  • Can be used as a combined soft-start and injection brake using the electronic brake modules LEKTROMIK B1
  • Conveyor belts
  • Packing equipment
  • Long-travel drives for cranes
  • Compressors
  • Heat pumps
  • Vibration transporters
  • Machines with gearbox, belt or chain drives
  • Special version for pole-change motors
LEKTROMIK<sup>®</sup> S2, SD2


Soft start and soft stop LEKTROMIK®S2, SD2
4 – 2000 kW

  • 3-phase control
  • Wide voltage range 3AC 110 – 500 V or 3AC 220 – 690 V
  • Ramp-up time, ramp-down time and starting torque adjustable
  • Ramp-up times up to 100 s possible
  • Can be combined with electronic DC injection brakes
  • Current limit and upgrading with special functions
  • Control of external bridging contactor
  • Can be used as voltage controller
  • S2: Option I2 integrated
  • SD2: “Delta” connection (6 motor cables)
  • Pumps
  • Fans and compressors
  • Refrigeration compressors
  • Conveyor belts
  • Grinding machines
  • Saws
  • High speed and high load belts
  • Drives with pole-change motors
  • Machines with gearbox, belt or chain drives
  • Centrifuges