In ungrounded system how do we deal with the unbesalanced load betwden phases
In ungrounded system how do we deal with the unbesalanced load betwden phases
Same way you would with line - line loads on any other system, connect load so that it is balanced as possible.
as others have said: there is no net unbalance. The other two phases pick up the "slack" of the one or vice-versa.As far as I underxtand when loads are not balanced the neutral will carry tbe difference but here with no neutral?
As far as I underxtand when loads are not balanced the neutral will carry tbe difference but here with no neutral?
...any unbalance would be same even if connected to a system with a neutral.On a system with a neutral conductor, the neutral carries unbalanced current from your line to neutral loads, but if you have no line to neutral loads how is the neutral going to carry any current?
If you have a lot of single phase load but none of it is line to neutral, the neutral has no current on it, and the same loads would still draw same current and any unbalance would be same even if connected to a system with no neutral.
A delta-configured secondary is also more tolerant of imbalance. Attached image depicts how the current of one single-phase load's current is handled by the three secondary windings. I used only one single phase load because the vector sum for three imbalanced single-phase loads isn't quite as obvious...As far as I underxtand when loads are not balanced the neutral will carry tbe difference but here with no neutral?
...any unbalance would be same even if connected to a system with a neutral.
He was just closing the loop. On the second lap.Thanks, I think:blink:
So 480V, 1ph loads on a 480V delta - say like 1ph lighting circuits?
Be very uncommon, most loads on un-grounded 3ph are 3ph loads, like heaters or motors.
Still, with the information you have given, say one did hve un-balance loading on a 3ph Delta - what difference would it make? I'd say it is a "so what".
ice
A delta-configured secondary is also more tolerant of imbalance. Attached image depicts how the current of one single-phase load's current is handled by the three secondary windings. I used only one single phase load because the vector sum for three imbalanced single-phase loads isn't quite as obvious...
No.Shouldn't the values be 17.3A, 6.35A, 6.35A? Phase vs Line current?
Look at it as two parallel power sources. Both have the same voltage and phase. The only difference is the impedance of the source...Shouldn't the values be 17.3A, 6.35A, 6.35A? Phase vs Line current?