Balanced three phase 866V Y source feeding delta load through transmission line

Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
Sign up Log in
4 replies · 3K views
s_arm
Messages
2
Reaction score
0

Homework Statement


A balanced three phase 866v, 60Hz Y connected source feeds a balanced delta connected load via 100km long three wire transmission line. The impedance of each wire of the transmission line is 1+j2 ohm. The three phase impedance of the load is 177-j246 ohm. If the phase sequence is positive determine:
the line and phase currents
the power absorbed by the load
the power dissipated by the transmission line


Homework Equations


is the 100km important in this question?


The Attempt at a Solution


I have tried to figure out the resistance of each conductor, but not sure if it's relevant
 

Discussion

Physics news on Phys.org
s_arm said:
1.

Homework Equations


is the 100km important in this question?


100 km isn't, but 1 + j2 is.
 
In what way should it be used?
 
s_arm said:
In what way should it be used?

In no way. All you need to know is the impedance of each line, plus the other data you're given.
 
Hint: a delta load can be redrawn as a wye load; then, since you have a balanced network, you can focus on one phase only ...