Recent content by stinkycheese

Passed Elec-Power Florida! mauldinite and stinkycheese to the rescue. A few months ago I remember thinking that all I'd need for the exam was the Camara PE Reference book... thanks to this board for correcting that naivete, among so many other mistakes that I was on the way to making over the...

The original post was for last months' exam, but for future test-takers: definitely get the 2011. It's stressful enough during the exam just finding all the arcane bits of NEC that are relevant to these questions, and after a few minutes of page flipping you don't want the nagging feeling of...

I felt pretty good about it too and am hoping I'm not being naive (200+ hrs studying I guess: SpinUp once, 4 CIs once, PPI twice). A reference that was VERY helpful was the ABB Protective Relaying book. It pays to have friends in the utility business, or you can have a few bake sales to buy that...

Just got these first two bound at Kinkos and they may help other last-minute reference assemblers. Good luck tomorrow everyone! Transformers, Source Impedance: />http://www.phillipsengineers.com/documents/TransformerandSourceImpedance_000.pdf System grounding, symmetrical components, etc...

Sorry if this is a repost, but this is a handy guide for paralleling transformers from the artist formerly known as Square D: />http://products.schneider-electric.us/support/technical-library/?event=detail&oid=09008926802f9112&cat=0b008926800f5616

I have the ABB relaying book (it's good to have friends at the utility!) and 211#1 does appear to be a three-line-to-ground fault. 211#2: line-to-ground. 211#3: no idea. If 0 and 2 were flipped, it would be line-line? 211#4: two-lines-to-ground fault

The question asks- for a three-phase motor requiring 3360kVAR in PF correction, you have 140 kVAR units. How many would you need per phase, if the units are to be connected in series? CI's answer is for 8 per phase. They say in the solution that series/parallel combinations don't matter, you...

There are a few questions from Complex Imaginary that ask about capacitor banks. To pick one (4-70), a 3P motor needs its PF improved by 3360 kVARs, using 140 kVAR units. The answer seems to be a straightforward 1120 kVAR/phase, or 8 units per phase. What I'm confused about is that CI claims...

It looks like I was the one confused about conjugates. Argh. Thanks!

For the CI problem: The cross-sectional area at any point in the core is x^2. If you look at the top right of the core you'll see an <--x--> in white. It's hard to see on the grayscale shading. For CI the only dimension that matters is the area of the core A. 1.6T = 1.6Wb/m2. If 1.6Wb/m2 *...

kW: Imotor current would be I=14.43<-53.13 Imotor apparent power would be S=sqrt(3) * 14.43 * 480 = 12000<+53.13 (double check- correct as this is lagging) An easier way (for me) than the NCEES solution here is to just add the S vector forms. 8000<-45.6 + 12000<+53.13 =...

Just working a problem when my display started to fade unless I pointed the solar cell at the window. Just a heads-up in case this wasn't on your exam-day checklist already!

The CI answer is 6.6. As I wrote above, I got 3.65A.

Thanks genie17 for the quick reply! -sc

There is no load on phase B.