When you want to order a diagram for a dual-speed motor, you need to choose the variant you need.
If you are not sure, we will help you with advice.
In any case, attach an image of the nameplate.
Brief explanation:
- Two Speed * Three Phase * Variable Torque
Fans, blowers and centrifugal pumps. Variable torque motors have horsepower
ratings that vary as the square of the speed, while torque varies
directly with the speed.
- Two Speed * Three Phase * Constant Torque
Mixers, compressors, conveyors, printing presses, extractors, feeders and
laundry machines. Constant torque motors are capable of developing the
same torque for all speeds. Their horsepower ratings vary directly with the
speed.
- Two Speed * Three Phase * Constant Horsepower
Machine tools, such as drills, lathes, punch presses, hoists, cranes and milling machines.
Constant horsepower motors develop the same horsepower at all operating
speeds, and the torque varies inversely with the speed.
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