Single Phase Soft Starters

This product has been developed specifically to soft start large single phase compressors and motors. It provides a dramatic reduction in the starting current but still provides full start torque. It will automatically adjust itself to cover the range of 0.5 to 7 hp. It is fully self-contained in a conveniently small, double insulated enclosure. Contact us for more information.

Two Versions Available

  • Master - includes the function of the contactor
  • Slave - used in conjunction with an existing contactor

Features & Benefits

  • For motors 0.5 to 7 horse power electrical
  • Reduces locked rotor amperage (LRA) up to 70% at startup
  • Eliminates light flicker
  • Reduces startup noise
  • Automatic optimization of motor current
  • Reduced stress and heating of compressor/motor extends the life
  • Allows systems to meet certain utility requirements
  • Reduction in the horse power required for mobile power generation
  • Easy installation with supplied wiring (special wiring options available)

Motor Protection Functions

  • Protects the compressor/motor from getting damaged at low voltages
  • Delay function limits number of motor starts per hour
  • Thyristor protected for long life (master model only)
  • No extra motor contactor needed (master model only)
  • Provides phase reversal protection
  • Internal timing prevents rapid cycling faults
  • Useful for off-grid and brownout applications
  • Self-testing diagnostics (master model only)

Models

  • Part# SS6S0.5-1.75-USL-115V (covers all - 60/50Hz)
  • Part# SS6S2-3.5-USL-230V (1.5 to 3 hp - 60/50Hz)
  • Part# SS6S3.5-7-USL-230V (3.5 to 7 hp - 60/50Hz)

Literature

Video

Specifications

Voltage220-240 volts AC
Frequency Models work on 50Hz or 60Hz
Maximum Starting Current44 amps rms, typically 40 amps rms
Maximum Step Starting Current 39 amps rms, typically 36 amps rms
Maximum Supply Impedance0.8 ohms
Control Input240 volts AC
Dimensions135mm x 75mm x 50mm (high)
MaterialABS flameproof (UL-94VO)
Software Cycle Delay 180 sec., defrost cycle compatible
Software Fault Delay300 seconds
Software Optimization 1.5 to 7 hp compressors
Duty Cycle15 starts/hr
Shutdown on Low VoltageLess than 195 volts
Power Loss Reset100ms detection
Motor MonitoringMonitors start winding potential
Motor ReversalShutdown for 180 sec.
EMC Compliance #N2002

Dimensions

Electrical

Sure-Start vs. Locked Rotor Amperage

Typical Amperage Reduction with Sure-Start

Nominal Tons RefrigerationMotor SizeBefore Sure-StartAfter Sure-Start
7 Btu7 hp183A55A
6 Btu6 hp150A40A
5 Btu5 hp130A36A
4 Btu4 hp100A29A
3 Btu3 hp75A23A
2 Btu2 hp50A15A

Wiring Schematic

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!