Stellar Soft Starters

AC Motor Soft Starters | STELLAR™ SR22 Series Compact 3-Phase Soft Starters

SR22 semi-conductor solid state soft starters provide many advantages when used instead of electro-mechanical contactors to control 3-phase AC induction motors:

5A to 40A rated current versions
45mm and 55mm standard sizes
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

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PRODUCT INFO

Soft starter,5A,208-230/460VA

$494.00
Soft starter,7A,208-230/460VA

$533.00
Soft starter,9A,208-230/460VA

$539.00
Soft starter,12A,208-230/460A

$560.00
Soft starter,16A,208-230/460A

$598.00
Soft starter,22A,208-230/460A

$777.00
Soft starter,30A,208-230/460A

$1,034.00
Soft starter,36A,208-230/460A

$1,280.00
Soft starter,40A,208-230/460A

$1,535.00
Cooling Fan SR22 series,45mm

$167.00
Cooling Fan SR22 series,55mm

$175.00
Optional heat shrink Inst kit

$25.00

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 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

Applications

General purpose soft start applications where traditional across-the-line starting or wye-delta starting would typically be appropriate.
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, Voltage Regulator, Tumbler, Wood Chipper.

SR22 Series Soft Starters

Features

5-40A @ 208-460V
24 VDC control voltage
Easily and separately adjustable motor 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: 45 mm & 55 mm
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 Soft Starter Accessories

Cooling fan (increases # of motor 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 motors or larger motors can be started from lower-capacity power sources
- 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 starting current reduces electrical power costs by reducing peak demand

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 Soft Starters / Cooling Fans

Compact AC Motor Soft Starters Overview

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