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I may have misled using the term loss, the voltage drop through the VFD is 8% or approximately 38 volts. That gives a maximum voltage at the output of the VFD of 441. Even with zero drop due to cabling, there is insufficient voltage for the motor.

The motor is rated at 350 HP but draws 550Amps and is 20inches in diameter. It is used as a submesible mixing pump. The PF is 76% and efficiency is 79%. Loss through the VFD is 8%.

We will be installing a specially designed motor that will require a minumum of 460 VAC at the motor terminals. The motor will be controlled by a Variable Frequency Drive. When calculating the volatge drops due to motor leads, supply cable and VFD losses, we need 525 VAC at the line side input...

What are the advantages/disadvantages/potential problems that need to be addressed when choosing between the following installations? Cost and redundancy need not be addressed. The installation of a single 4000kVA transformer or two 2000kVA transformers.

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