Can anyone have any comment on what will be the load voltages and load power of the system (3 phase 480V, 10 MVA Y transformer connected to A balance delta load of 100 ohm each legs). i looked at the following links which is similar to the questions but after 75 posts, the disagreement is still on.
(http://forums.mikeholt.com/showthread.php?t=92341).
I am not a Power expert, but the following is my two cents:
1. ALWAYS start with drawing up a "Single Phase Diagram"
2. Solve for the I line
3. Convert the I line to I phase (Depending on the load connection )
4. Calculate the requested values
So to solve this problem, when you draw a single diagram you end up with
V source=480/SQR(3)=277.13 Volts,
Z line=100 Ohms
Then I line=2.77 Amperes.
Now convert this line current to phase current by multiplying by SQR3 (delta connection), then I phase =4.8 Amperes
Pphase=Iph^2*Zph=4.8^2*100=2304 Watts
Three Phase Power=3*Pphase=3*2304=6912 Watts
I hope this helps!