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AC Motor Soft Starters

AC Motor Soft Starters: - Application types include:

General purpose soft start motor control applications where traditional across-the-line starting or wye-delta starting would typically be appropriate.
  • Agitator
  • Air Compressor
  • Ball Mill
  • Centrifuge
  • Chiller
  • Conveyors
  • 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
  • Voltage Regulator
  • Tumbler
  • Wood Chipper.

Compact 3-Phase Soft Starters (SR22 Series, 5A - 40A)Compact 3-Phase Soft Starters (SR22 Series, 5A - 40A)

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.
  • 5-40A @ 208-460V
  • 24 VDC control voltage
  • 3- Phase (two-phases controlled)
  • Internal bypass contacts for run
  • Error and Run LEDs
  • DIN rail mounting
  • Two standard-size widths: 45mm & 55mm
  • Six error/trip indications: AC Supply, Control Supply, Overheated, Bypass Failure, Shear Pin, Overcurrent
  • UL listed* (E333109) *(optional fans are UL recognized: E132139, E77551, E89936, CE, RoHS)
  • Accessories: Cooling fan (increases # of motor soft starts/hour)
Basic 3-Phase Soft Starters (SR33 Series, 22A - 482A)Basic 3-Phase Soft Starters (SR33 Series, 22A - 482A)

SR33 semi-conductor solid state soft starters provide many advantages when used instead of electro-mechanical contactors to control 3-phase AC induction motors, and are designed to fit in place of existing wye-delta starters.
  • 22-482A @ 208-460V
  • 24 VDC or 115 VAC I/O
  • 24 VDC control voltage
  • 3-Phase (two-phases controlled)
  • Internal bypass contacts for run
  • Designed to replace wye/delta starters
  • Fault indication of 4 or 7 fault types, depending upon model: SCR or Power Supply, Overheat, Control Power Supply, Bypass Relay Failure, Shearpin, Overload, Overcurrent
  • CE, UL E333109 listed (soft starters SR33-350 to SR33-482 are not UL listed or recognized)
  • Accessories: Heat-shrink insulation kit SR33-HS1
Legacy Full Featured 3-Phase Soft Starters (SR44 Series)Legacy Full Featured 3-Phase Soft Starters (SR44 Series)

SR44 series solid state starters have an Automatic Application Setup that fully configures the motor soft starter for a specific application with one entry. SR44 series motor starters also have a built-in "Optimizing" mode that reduces energy costs when used on lightly loaded and oversized AC motors, and external bypass capability for efficient running at rated speed.
  • 9370A @ 230460VAC (suitable for use on 208V systems)
  • 115 or 230 VAC selectable control voltage
  • Fully programmable, full three-phase motor control
  • External bypass capability for run
  • Can be connected in-the-delta, allowing use of a smaller soft starter
  • Can be used for motor reversing (with external contactors)
  • Keypad: 6 buttons with 2-line, 32-character display
  • Programmable I/O for remote/PLC-based control
  • IP20, panel mount, CE, REACH, RoHS listed
  • UL (cULus E333109) listed (Options SR44-KPD & SR44-RS485 are not UL approved)
  • Accessories: Communication/Modbus card SR44-RS485, Remote keypad SR44-KPD (requires SR44-RS485)
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