PAM Speed Switching
The most widely accepted speed changing device for the PAM Motor is the oil-filled, five pole, motor-operated speed-changing switch.
It is typically installed close to the motor to minimize cable requirements. There are six leads (three for each speed) from the switch to the motor.
The PAM Motor is usually started on its lower speed winding to keep the inrush current low. This prolongs motor life by keeping rotor and core temperature excursions to a minimum. Starting on the lower speed is also more desirable for driven equipment considerations.
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