Recent content by trying2pass

The generator voltage is 22 kV, the transformer ratio is 25kv:220 kV. The expectation is that the voltage will be slightly lower than 220 kV. The voltage on the high-side of T1 will be 22kV*(220kV/25kV) = 193.6 kV. The beauty of pu analysis is that T1 and T2 are not even part of the problem...

That makes so much more sense!! I tried it on 3.18 and 3.19 and it worked! However, I did try this very same concept to the next two problems (3.20 and 3.21) and got one of the conversions wrong. Here are the ratings: (One line connected from left to right) Generator G: 200MVA, 22kv, x=.2pu...

I read your post more than a few times. It makes sense, but still confused, but not as confused after reading your post. I guess my next question would be how did you know which voltage or ratio goes on the numerator and which goes on the denominator? When you say turns ratio I immediately...

T1: 240MVA Delta/Y 45KV:345KV T2: 210MVA Y/Y 345KV:138KV T3: 180MVA Y/Delta 132KV:13.6KV Region 1 includes the ground, voltage source Vg, and primary of T1. Region 2 includes the secondary of T1 and primary of T2 with an impedance of Z12 between them. Region 3 includes the secondary of T2...

Both of these questions ask for the internal voltage of a machine, but both uses different equations. Why? I know there is something I'm missing and I'm sure it's really simple. For #135, I used E(internal)=E(terminal)+I(X'd) which I got correct. For #522, I used the same equation as #135...

Thanks Flyer! That makes sense and definitely clears things up.

I wasn't able to get online for a couple days. Thanks for your responses, but I'm still somewhat confused. If you take a look at NCEES #517 with the synch. motor at 8KVA with a leading .7pf(+) and induction motor at 14.43A with lagging .6pf(-), voltage is 480V. Question asked for the power...

I thought I had this in the bag, but I've done more questions and it was opposite of what I was doing. Can someone clear things up for me. Leading and lagging power factors and their angles. I use a negative angle for a leading (+) pf and a positive angle for laggin (-) pf. Is this correct...

Has anyone done the Electrical one?

Has anyone tried this online practice problem cafe and is it worth to get? Are the questions different from the NCEES power questions or practically the same? Thanks all.

I'm taking my exam in Oct too and saw this in the application. I am in the same situation, but I have two PE's in my office as my reference. I had a friend call and said that not all of them needs to be a registered PE, but i do not know that for sure.

Good Luck!!