send the formula for calculate the unbalance voltage in %

shankar
03/19/2010

Send me the formula,please...

pel.diagonalley@gmail.com

skilef
05/20/2010

The formula as defined by NEMA is... Voltage Unbalance = 100 x Maximum Deviation from Average Voltage / Average Voltage. Articles Example: 100 X 5 / 222 = 2.25

Dear Sir,

I want to know the formula of unbalance current as well as unbalance power & what is the effect on electrical equipments due to above cause?

AHFAZ
02/06/2011

AHFAZ, Below the Comment box there are two links to two more articles on Unbalanced Voltage with solutions for the problem. You may find those helpful.

You may want to check out the Phaseback unit from Applied Energy.

www.phaseback.com. They use a ferro magnetic resonate circuit (if I am calling it correctly) that balances voltages to within a few degrees of each other. They also have a DVS - drive voltage stabalizer that goes on the output of a drive for significantly reducing the amount of harmonics into the motor extending its life.

Preston Cobb
03/25/2013

Can I have the full steps to calculate unbalance voltage.

Is there a automatic calculator where you put in the values and get the result

atendra sen
10/25/2013

I''m not aware of that atendra other than what is on this page!

That''s pretty cool Preston!

good afternoon

I''m doing a refrigeration program and have had trouble making this voltage unbalance formula in excel, I could send this formula to my email

thank you very much

Henry Gonzalez

Henry Gonzalez
11/10/2013

Henry, try the below two links. They will get more into depth on the subject.

I cant figure out what I am doing wrong. I have 460, 460, and 480. Average is 466. I divide 14 by 466 and times by 100. I get 3%. The calculator says 2.86.

Please help, Thanks

David Esack
12/28/2013

Hi David, The calculator carries numbers to a certain number of decimal places below zero. In that case the average is 466.666... 3% is only 0.14% more than 2.85% so I''m thinking that isn''t enough to be concerning.

Hello friend took days trying to unbalance the formula in excel, I could indicate this formula

Henry Gonzalez

Henry Gonzalez
01/08/2014

Cool Henry! I''m glad you found it useful