250HP 480V or 4160v
250HP 480V or 4160v
(OP)
At what horsepower should I change from 480v to 4160v? I may have a 250hp or larger motor that I will need to feed. What is a general a rule of thumb for maximum horse power on a 480v circuit.
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: 250HP 480V or 4160v
If you have ONE large motor, it probably makes sense to stick with 480 V as long as you can supply it from your existing 480V transformer. That will usually be the limiting factor. You can buy a 1000 hp 480 V motor. But starting it might be a problem. If you have ten 300 hp motors, it will probably be less expensive to go with 4160V.
Likewise, you can buy 100 hp medium voltage motors, but you will pay a hefty premium until you get up around 300 hp or so.
And if this motor is to be fed from an Adj. Freq Drive, that's a different scenario entirely.
RE: 250HP 480V or 4160v
Eng-Tips: Help for your job, not for your homework Read FAQ731-376