Three Phase Soft Starters

The three phase soft starter connects between the contactor and the motor. While it does reduce the starting current and provide compressor reverse protection, its main function is to reduce locked rotor amperage (LRA) at startup to provide a more controlled start to limit the mechanical noise and shock of a three phase motor or compressor.

The three phase soft starter is also designed to learn the motor characteristics of the load. After a few starts it will have automatically adjusted itself to the load and the electrical supply impedance at the site. Contact us for more information.

Features & Benefits

  • For motors 2 to 20 horse power electrical
  • Reduces locked rotor amperage (LRA) up to 40% at startup
  • Eliminates light flicker
  • Reduces startup noise
  • Automatic optimization of motor current
  • Reduced stress and heating of compressor/motor extends the life
  • Monitor protection on two of the three phases
  • Allows systems to meet certain utility requirements
  • Easy installation with supplied wiring (special wiring options available)

Motor Protection Functions

  • Low voltage shutdown
  • Delay function limits number of motor starts per hour
  • Thyristor protected for long life
  • Provides phase reversal protection
  • Internal timing prevents rapid cycling faults
  • Useful for off-grid and brownout applications
  • Self-testing diagnostics

Models

  • Part# SS3S2-20-US-460 (460V, 60Hz)
  • Part# SS3G-50 (415V, 50Hz)
  • Part# SS3-A (415V, 50Hz with neutral)

Literature

Video

Specifications

Voltage 415 or 460 volts AC
Frequency Models available for 60Hz or 50Hz
Maximum Cont. Current25 amps rms
Dimensions135mm x 75mm x 50mm (high)
MaterialABS flameproof (UL-94VO)
Software Fault Delay300 seconds
Software OptimizationCompensates for motor size
Phase Rotation DetectionLock-out for reverse phase sequence
Duty Cycle15 starts/hr
Initial Power on Delay2 seconds
Shutdown on Low VoltageLess than 195 volts to neutral
Power Loss Reset150ms detection

Dimensions

Hyper Engineering is not to be held responsible for erroneous literature regarding capacities, dimensions, applications, etc. stated herein. Products, specifications, and data in this literature are subject to change without notice. The information herein is intended for use only by persons having the appropriate technical knowledge and skills (at their own discretion and risk). Since conditions of use are outside Hyper Engineering's control, we cannot assume any liability for results obtained or damages occurred due to improper application.

Over 250,000 Sure-Starts in use worldwide!