HOW DOES THE COST OF A PHASE CONVERTER COMPARE TO THAT OF REPLACING THREE-PHASE MOTORS WITH SINGLE-PHASE ONES?

By Glen Floreancig

In small horsepower ratings (under 3 HP), it may actually be economical to replace the motors.

When the motor size is larger than 5 HP, however, single-phase motors are extremely difficult to find and expensive.

Single-phase motors are also far more maintenance-prone and much less efficient than three-phase motors.

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