Generally if it is under 10HP, the differences are immaterial. Smaller motors are manufactured under a compromise based on using a 220V design base +-10%, which makes them suitable for 198 - 244V, and it is generally accepted that 208V is used in "smaller" facilities where the distance from the service drop to the motor will not make it so that the VD is severe enough to go lower than that.220V-3 PH motor
Can it be run at 208V?
Needs to be installed with a Variable frequency drive.
Why not? You can get more then rated HP out of any motor, the cost is increased current and increased heating most likely resulting in shorter life. Generally motors will try to deliver the load being demanded from them and if voltage is too high or too low it compensates with a change in current. It can get much more complex then that, but that is generally a good base of what will happen.You will not get the same Hp out of the motors at reduced voltage.
Why not? You can get more then rated HP out of any motor, the cost is increased current and increased heating most likely resulting in shorter life. Generally motors will try to deliver the load being demanded from them and if voltage is too high or too low it compensates with a change in current. It can get much more complex then that, but that is generally a good base of what will happen.
I agree, I should have clarified that to maintain heat within limits and retain motor life expectancy, you would need to reduce the Hp.
Maybe he won't need it if he is using a VFD.You will not get the same Hp out of the motors at reduced voltage.
You can't get 230V out with 208V in.Since some drives have the option of adjusting the output voltage, if this is the case leave it at the factory default of 230V.
The day I figure out how to make a drive create something that isn't there, I'll be fabulously wealthy enough to kill myself with excess pleasure. So if I ever stop posting here, you'll know what happened...:thumbsup:You can't get 230V out with 208V in.
I don't know whether to wish you well or badly in your endeavours............The day I figure out how to make a drive create something that isn't there, I'll be fabulously wealthy enough to kill myself with excess pleasure. So if I ever stop posting here, you'll know what happened...:thumbsup:
You could if the drive included a boost converter for the DC. But nobody would be willing to pay for that when they could just use a boost transformer on the input instead.You can't get 230V out with 208V in.
I just knew some pedant would come up with that.............You could if the drive included a boost converter for the DC.
I just knew some pedant would come up with that.............
Plus whatever tolerance limits apply to the 208V supply.I don't think you will see any problems with it. If you think about it you will be about 5% low on the voltage which
in practice isn't a big deal.
You can't get 230V out with 208V in.
YW!I stand corrected.