3phase system, unbalance

[Jed057]

Dear Guru,
just need some help concerning unbalace load in 3 phase system.

Nomally, I saw only magtitude different between 3 phase but today after check at site on MCC.
I fould the angle diff between Phase A and B is 120 degree but the problem in between A and C is 127 degree why not 120 what is wrong in this system, pls advise.

Thanks
young eng.

 

[dpc]

Are you measuring voltage or current?

David Castor

http://www.cvoes.com

 

[davidbeach]

120 degrees between phases is nominal. Many things can lead to off-nominal phase angle separation. Some are not to worry about, others may be cause for concern. Without more information it would be hard to tell what you have.

 

[Jed057]

Thanks for your answer.
I measuring current.

 

[dpc]

The current angles depends on the power factor of the loads.



David Castor

http://www.cvoes.com