Discussion in 'Homework Help' started by ElecNerd, Jan 2, 2011.

1. ### ElecNerd Thread Starter New Member

Jan 2, 2011
20
0
In the process of completing some revision questions. Could someone advise me on how I would calculate the current in the red line and the total reactive power dissipated for a DELTA connected load comprised of an impedence of 10 <40° with a line voltage of 650V.

Whilst I understand a majority of the theory behind the DELTA connections I am getting confused with how to calculate these questions? Do I need a phasor diagram to work this out?

I am not after just the answers by any means - I am looking for guidance to be able to ultimately completely these myself however due to lack of guidance from the tutor a lot of the formulas are having to be researched myself...

Thanks again for all your help!

2. ### edgetrigger Member

Dec 19, 2010
133
19
for delta as explained to you in your other threads phase voltage and line voltage are same.

So VL = 650 = Vp

Vp = 650<0, that voltage has to be taken as 650 angle 0 degree

I = V/Z

Ip = 650<0/10<40
= 65<-40

IL = √3 65<-40 in polar form.