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Single Phase HVAC Compressor Soft Start
Carlo Gavazzi RSBS Series

This is still available, however, it is for OEM applications only.
Please contact us to discuss your application!

Great for residential applications!
RSBS23 Series, black and white
Energy conserving heat pump soft start
Single Phase HVAC Compressor Soft Start<BR>Carlo Gavazzi RSBS Series


This product has been retired.

Scroll compressors have earned a strong reputation in HVAC applications by proving to be a more reliable and efficient solution than other categories of compressors.

Scroll compressors are generally 10 to 15% more efficient than piston compressors. Worldwide initiatives promoting energy efficiency in the building sector are generating a growing interest for more cost saving and efficient HVAC solutions, making the use of scroll compressors more and more a necessity.

Softstarters provide a means of reducing high inrush currents and the associated effects. Through the application of a controlled voltage ramp or a current limiting algorithm, a smoother, jerk-free start is achieved.

Ramp-up time is slightly longer when compared to a DOL start, but still maintained below 600ms, so it complies with recommendations from scroll compressor manufacturers.

CARLO GAVAZZI has recently launched the RSBS Series single-phase plug-and-play soft start, which reduces the starting current with heat pumps, which are most popular in residential installations.

The Carlo Gavazzi RSBS soft start represents a solid innovation since it limits the amperage demand, which peaks when single-phase scroll compressors - usually used in heat pumps - are starting.

By maintaining the starting current below fixed limits, the RSBS allows to avoid high energy tariffs. It also reduces heat dissipation, thanks to bypassing of its internal power semiconductors.

The Carlo Gavazzi RSBS soft starter provides a 60% reduction in current and increases compressor lifetime. This new soft start extends the range of the already existing RSBS platform, to provide starting solutions for compressors rated up to 32 Arms. This product launch strengthens Carlo Gavazzi’s leading position in the single phase heat pump sector.

The RSBS can also be supplied with an optional auxiliary alarm relay (Option - V22).

Do you need a three-phase scroll compressor soft start? The Carlo Gavazzi RSBT is your answer!

  • Manufactured by Carlo Gavazzi
  • For OEM applications - please call to discuss your application before ordering
  • Provides up to 60% reduction in current and increases compressor lifetime!
    • Eliminate light flickering, voltage disturbances and stress on the compressor
  • Avoid high-energy tariffs by maintaing starting current below fixed limits
  • Optimized performance for scroll compressors
  • Integrated current limit feedback for inrush current reductions
  • Reduced mechanical stress
  • Integrated diagnostic features for safe operation at all times!
  • Rated operational voltage:
    • 230 VACrms, 50/60 Hz
  • Rated operational current:
    • up to 32A: AC-53b
  • Complies with EMC Class B (residential) requirements
    • Inrush current reduction up to 60%!
  • Integral bypassing of semiconductors
  • Built-in transient overvoltage protection
  • Undervoltage protection after ramp up
  • DIN rail or panel mount
  • EMC Compliant
  • Optional auxiliary alarm relay output
  • Relay Protection