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You are looking at:  Drives > AC Motor Soft Starters > Compact 3-Phase Soft Starters (SR22 Series, 5A - 40A)

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For stock status, special notes and other information please see this product's detailed information page.
/images/categories/p3_t_compact3phasess.jpg
Compact 3-Phase Soft Starters (SR22 Series, 5A - 40A)
Basic 3-Phase Soft Starters (SR33 Series, 22A - 482A)
Full Featured 3-Phase Soft Starters (SR44 Series, 9A - 370A)



Compact AC Motor Soft Starters - SR22 Series

STELLAR™ SR22 Series Compact 3-Phase Soft Starters

  • 5A to 40A rated current versions
    @ 208–460V

  • 45mm and 55mm standard sizes

SR22 semi-conductor solid state soft starters provide many advantages when used instead of electro-mechanical contactors to control 3-phase AC induction motors:
  • The SR22 series motor soft starters use thyristors for controlled reduced voltage motor starting and stopping

  • These low voltage soft starters then switch to internal contacts for efficient running at the rated speed
Compact AC motor soft starter prices start at $119.00 (SR22-05).

Applications
General purpose soft start motor control applications where traditional across-the-line starting or wye-delta starting would typically be appropriate. Typical application types include:
  • Agitator
  • Air Compressor
  • Ball Mill
  • Centrifuge
  • Chiller
  • Conveyor
  • Crusher
  • Escalator
  • Fan (Low and High Inertia)
  • Feeder
  • Grinder
  • Hammer Mill
  • Lathe Machine
  • Mills (Flour, etc.)
  • Mixer (Unloaded or Loaded)
  • Pelletizer
  • Plastic and Textile Machines
  • Press (Flywheel)
  • Pump (Centrifugal)
  • Pump (Positive Displacement)
  • Rolling Mill
  • Saw (Band)
  • Saw (Circular)
  • Screen (Vibrating)
  • Transformer
  • Tumbler
  • Wood Chipper
Stellar Compact Soft Start Motor Controller
STELLAR SR22 Series Compact 3-Phase Soft Starters
Features
  • 5A-40A @ 208V-460V
  • 24 VDC control voltage
  • Easily and separately adjustable motor soft start and stop times
  • Two-phase control
  • Internal bypass contacts for run
  • Error and Run LEDs
  • DIN rail mounting
  • Cooling fans (available option)
  • Two standard-size widths: 45mm & 55mm
  • Six error/trip indications: AC Supply, Control Supply, Overheated, Bypass Failure, Shear Pin, Overcurrent
Standards and Approvals
  • UL listed* (E333109) *(optional fans are UL recognized: E132139, E77551, E89936)
  • RoHS
  • CE
Optional Motor Soft Starter Accessories
  • Cooling fan (increases # of motor soft starts/hour)
Advantages
  • Mechanical Advantages
    • Smooth acceleration; reduced shock and starting stress
    • Extend lifespan of mechanical drive train components
    • Fluid couplings and some clutches can be eliminated
  • Electrical Advantages
    • Reduced motor starting current
    • More AC motors or larger AC motors can be started from lower-capacity power sources
    • Soft start motor control allows motors to be started more frequently
    • Internal mechanical contacts open and close under reduced current, increasing lifespan and reliability
  • Economic Advantages
    • Lower overall costs for new installations
    • Reduced maintenance and replacement of mechanical drive train components
    • Reduced motor starting current reduces electrical power costs by reducing peak demand


AC Motor Soft Starter Selection / Sizing
  • Our Sizing Chart contains 3 easy steps to properly size your soft starter based on horsepower, voltage, and starting class

Compact Motor Soft Starters / Cooling Fans

Part No. Description Price
SR22-05 Soft Starter, 5A, 208-230/460 VAC, 3-phase 50/60 Hz, 45mm $119.00
SR22-07 Soft Starter, 7A, 208-230/460 VAC, 3-phase 50/60 Hz, 45mm $130.00
SR22-09 Soft Starter, 9A, 208-230/460 VAC, 3-phase 50/60 Hz, 45mm $139.00
SR22-12 Soft Starter, 12A, 208-230/460 VAC, 3-phase 50/60 Hz, 45mm $176.00
SR22-16 Soft Starter, 16A, 208-230/460 VAC, 3-phase 50/60 Hz, 45mm $196.00
SR22-22 Soft Starter, 22A, 208-230/460 VAC, 3-phase 50/60 Hz, 55mm $222.00
SR22-30 Soft Starter, 30A, 208-230/460 VAC, 3-phase 50/60 Hz, 55mm $300.00
SR22-36 Soft Starter, 36A, 208-230/460 VAC, 3-phase 50/60 Hz, 55mm $372.00
SR22-40 Soft Starter, 40A, 208-230/460 VAC, 3-phase 50/60 Hz, 55mm $449.00
SR22-FAN-45 Cooling Fan for 45mm soft starter $46.50
SR22-FAN-55 Cooling Fan for 55mm soft starter $46.50


Compact AC Motor Soft Starters Overview

For more details, select the "Products" tab and click on the desired "Item Code" or select the "Technical Info" tab.



  


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