E. Dold & Söhne GmbH & Co. KG

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E-Mail: dold-relays@dold.com

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UH 9018


UH 9018

Mains / motor voltage

Nominal motor power

Approvals and Markings


  • 0066471
  • UH9018 3AC400V 50/60Hz 1,5kW
The softstarter UH 9018 is an electronic device designed to enable 1-phase or 3-phase induction... more

Product description

The softstarter UH 9018 is an electronic device designed to enable 1-phase or 3-phase induction motors to start smoothly. The devices slowly ramps up the current on two phases, therefore allowing the motor torque to build up slowly.This reduces the mechanical stress on the machine and prevents damage to conveyed material. These features allow cost saving constructions of mechanical gear. When the motor is up to full speed the power semiconductors in UH 9018 are bridged to prevent internal power losses and heat build up. In addition UH 9018 allows a softstop function prolonging the stop time of the motor, preventing high counter torques from abruptly stopping the motor.

Technical specifications

Widths: 45 mm
Load voltage up to: 3AC 400 V
For three-phase motors, 400 V up to: 7,5 kW
Signalling output: Yes
Extra functions: Temperature monitoring, Mains monitoring
Type: UH 9018


  • Protection of the drive unit
  • Integrated bridging contactor (Bypass)
  • Easy operation
  • Comprehensive diagnostic via LED-flashing codes possible


  • According to IEC/EN 60947-4-2
  • Softstart with softstop
  • For motors from 1.5 kW to 7.5 kW
  • 2-phase control
  • Adjustable ramp time, starting torque and starting voltage
  • Kickstart-(Boost-)function
  • DIN-rail mounting
  • Width: 45 mm