Ok just came back from making a visit out to the test site prior to this Friday's exam. I'm so glad I did because apparently the hotel name on the admission notice and the actual hotel name on the side of the expressway was not the same. It turns out that the former Best Western is now under new ownership but nobody bothered to change the name on the building to the new hotel name! So, advice to the others taking it this Friday, check out the test site before then, especially for anyone taking it in Chicago.
mudpuppy, Jim & John,
Thanks so much for the awsome feedback. Not only did you all show me how to solve it, but also reiterated the most important thing about per unit bases being equal.
Here comes another one of my hypothetical questions again (I feel I will make a good test maker one of these days!).
Suppose the line side MVA rating was actually 30 MVA and the generator side rating remains at 50 MVA.
Obviously they are different bases, so after find I_pu on the line side, I need to have the following equation before continuing to the generator side, correct?
I_pu_new = I_pu_old * (30 MVA / 50 MVA) = 0.35 * (30 MVA / 50 MVA) = 0.21 pu
Also, John, did you use equations 1.50 and 1.51 in the Grainger book (p.26-27) to solve this?