Soft Starter

A soft starter is a device used with AC electrical motors to temporarily reduce the load and torque in the power train and electric current surge of the motor during start-up. This reduces the mechanical stress on the motor and shaft, as well as the electrodynamic stresses on the attached power cables and electrical distribution network, extending the lifespan of the system.

It can consist of mechanical or electrical devices, or a combination of both. Mechanical soft starters include clutches and several types of couplings using a fluid, magnetic forces, or steel shot to transmit torque, similar to other forms of torque limiter. Electrical soft starters can be any control system that reduces the torque by temporarily reducing the voltage or current input, or a device that temporarily alters how the motor is connected in the electric circuit.
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  1. Siemens Soft Starter 3RW3013-1BB14
    Sirius Siemens Sirius Soft Starter 3RW3013-1BB14
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    $161.33
  2. Siemens Soft Starter 3RW3014-1BB14
    Sirius 3kW 3HP
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    $230.77
  3. Siemens Soft Starter 3RW3014-1CB14
    Sirius 110-230V 50/60HZ
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    $461.54
  4. Siemens Soft Starter 3RW3016-1CB04
    Sirius 200-460VAC 50/60HZ
    Rating:
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    $365.38
  5. Siemens Soft Starter 3RW3017-1BB14
    Sirius 12.5A 5.5KW/400V 110-230V AC/DC
    Rating:
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    $274.04
  6. Siemens Soft Starter 3RW3017-2BB04
    Sirius 11A 3/3/7.5HP 24V
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    $1,105.52
  7. Siemens Soft Starter 3RW3025-1AB04
    Sirius SOFTSTART 14AMP 480V 3PHASE 24VCTL OPEN
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    $500.00
  8. Siemens Soft Starter 3RW3034-1AB04
    Sirius SOFT STARTER 20HP 480VAC, 7.5HP 208/230VAC
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    $995.97
  9. Siemens Soft Starter 3RW3034-1AB14
    Sirius SOFTSTART OPEN 27A 3PH 480V 100-230VCTL
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    $346.15
  10. Siemens Soft Starter 3RW3035-1AA12
    Sirius OPEN 32A 3PH 575V 100-230VCTL
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    $642.98
  11. Siemens Soft Starter 3RW3044-1AB04
    Sirius 30KW. 200-480VAC/DC 24V 63A
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    $832.28
  12. Siemens Soft Starter 3RW3044-1AB14
    Sirius SOFTSTART OPEN 54A 3PH 480V 100-230VCTL
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    $1,001.26
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