Voltage Phase Angle Differences between two incoming sources
Voltage Phase Angle Differences between two incoming sources
(OP)
In industrial plants which are fed with two incoming utility sources (double ended main switchgear)is it a likely occurrence that the two incoming sources are usually out of phase with one another for one reason or another? I don't have much experience with utility distribution systems so I'm not sure if these two sources are usually derived from two different utility distribution transformers or are tapped at different points in the system thus causing a phase angle difference at the incoming service to the plant. I know different loading can cause this difference as well.
I know this is certainly possible due to some of the reasons I mentioned but I am curious how often this occurs? This would obviously prevent paralleling of the mains at the incoming switchgear so I was also curious how that is typically addressed?
I know this is certainly possible due to some of the reasons I mentioned but I am curious how often this occurs? This would obviously prevent paralleling of the mains at the incoming switchgear so I was also curious how that is typically addressed?






RE: Voltage Phase Angle Differences between two incoming sources
RE: Voltage Phase Angle Differences between two incoming sources
RE: Voltage Phase Angle Differences between two incoming sources
RE: Voltage Phase Angle Differences between two incoming sources
If you do tie the feeder together, I highly recommend relays that to sink check/phase angle before closing the tie and setting which split the tie for excessive power flows.
But lies the question: why normally closed operation desired?
RE: Voltage Phase Angle Differences between two incoming sources
RE: Voltage Phase Angle Differences between two incoming sources
Bill
--------------------
"Why not the best?"
Jimmy Carter