For those standard nine-wire motors that have internal Wye (or star) connections from the factory, a mental image of the winding arrangement may provide some insight for t… See more

When the supply voltage is lower, the total resistance of the load must also be lower in … See more

Since the voltage is squared, doubling that voltage from a low (240) to a high (480) source would require a 4x increase in resistance to maintain an equal output power. In o… See more

For high voltage, the total resistance must be 4x higher than for low voltage in order to maintain the rated output power. The image representation of this wiring scheme is easier to vi… See more