Capacitor start / capacitor run motors are more efficient and require less running current than motors with start capacitors only. These motors have two capacitors in series with the main stator winding. Start capacitors have a high capacity while the run capacitors do not. One optimizes starting torque while another optimizes running characteristics. Throughout both starting and operation all the windings in the motor remain energized.
At operating speed, the switch disconnects the start capacitor and turns on the run capacitor to maintain the motor's performance. Optimum levels of both starting torque and running characteristics are achieved with this design.
Capacitor start / capacitor run motors are used over a wide range of single phase applications primarily starting hard loads.
They are available in sizes from 1/2 to 25 horsepower.
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