titan1021
Senior Member
- Location
- Northern California
But you also have to take into account the tolerances on the 480V supply.That's only 9% higher than nameplate. Not only will most motors tolerate that, you won't have the full 480 volts at the motor after all the voltage drops accumulate.
That's only 9% higher than nameplate. Not only will most motors tolerate that, you won't have the full 480 volts at the motor after all the voltage drops accumulate.
Here no load volts is often near 500.
And that on a 440V motor...................
our 277-480 tends to hover around 495-500V no load. That’s only 4% voltage rise, but it’s about 13% higher than the motors rating.
Depending on your situation and where you are, the transformer could have taps and you could get the voltage lowered by 2.5% if needed.
will it work? Sure. How long?
I would definitely check the no load voltage.
Here’s some data on that motor.
http://www.teco.com.tw/fa/ecatalogue_file/en/HighEfficiencyMotor-AEHL-AEUL0710.pdf
From your link
Voltages - 220 V, 380 V, 400 V, 460 V or Daul Voltage.
I guess OP's is dual voltage with 220 being one of the two. Still possible this wasn't exactly intended to be used on 480 volts nominal, probably will work though but for how long?
Which gives a voltage tolerance of ±10%our 277-480 tends to hover around 495-500V no load. That’s only 4% voltage rise, but it’s about 13% higher than the motors rating.
Here’s some data on that motor.
http://www.teco.com.tw/fa/ecatalogue_file/en/HighEfficiencyMotor-AEHL-AEUL0710.pdf
Question is whether it truly is rated 440 volts, or is it intended to operate on 416 as well as 480? That does land about in the middle of that range.
Though places with 416 are usually 50 Hz so that idea isn't so good either.
The answer is highly questionable. May want to consider using a 480V to 440V transformer with adjustable secondary taps. Looks like 25KVA would be correct size. Motors dislike it when you change their intended voltage.
Consider the cost of that transformer vs the cost of a new motor. If the cost of a new properly sized 480V motor is less then the cost of transformer, go ahead and try the 440V motor. If the 440V motor fails, install the new 480V motor.
If cost of transformer is less than the cost of a new 480V motor, go ahead and install the correct transformer and all should work well.
So we should not use this motor on a 120/240 VAC supply?
https://smile.amazon.com/Grizzly-G25...6210578&sr=8-5
Grizzly Industrial G2527 - Motor 1/3 HP Single-Phase 1725 RPM TEFC 110V/220V
I say yes, and likewise for the motor in the OP, as long as there is no frequency disparity.
We've discussed this before, but this is the first time there's been a won't-work bent about it.