Plant Powering 2

[miltonzv]

What is the shorterm and longterm effect of powering a plant of 525Volt motors with 550V supply

 

[itsmoked]

That is only a 5% difference.

In the short term? None.

In the long term? Perhaps a little more energy cost maybe a percent. Possibly longer motor life due to possibly reduced current and hence slightly reduced winding temps. (Very slightly) Possibly longer motor life due to never under-voltaging your motors even in the plants darkest corners. Under voltage is the big motor killer not over voltage.

If you had a reversed voltage condition from your stated position I would say don't do it!!

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

 

[waross]

No problem. Reduced current and probable longer insulation life.
Some common voltages for motors and systems in North America are.
Motor System
Rated Nominal
Voltage Voltage
115 120
230 240
460 480
575 600
Respectfully

 

[powerjunx]

miltonzv,

i agree to itsmoked.

Motor will operate satisfactorily either short or long term provided that:

1.) motor operates within 10% voltage variation from rating.
2.) frequency is within 5% variation from rating.

Morever, 30% voltage variation is equivalent to single phase condition.