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Send me an offer by PM for any of these and if we come to agreement, I'll pull from eBay. I passed on my first try, so these all have good juju! :) Casio fx-115ES: https://www.ebay.com/itm/283363379800- SOLD Graffeo's Engineer's Guide to Passing Power...

Can anyone recommend some good last minute protection practice problems? I've worked through the related problems in Power Systems Analysis (Glover), Power System Relaying (Horowitz), as well as the EngPro and Graffeo guides and the NCEES exam.  I found the EngPro exam and NCEES exam...

All, A quick question about #129 in the NCEES practice exam. This is a voltage drop problem with a main distribution panel (MDP) feeding another panel, Panel A. The problem gives the MDP voltage as 480V, a load current of 400A with power factor 0.80, and provides cable details for the 250'...

Good morning, Can anyone please recommend references for power electronics? Inverters and rectifiers (specifically 3 phase) are definitely a weak spot in my understanding and references. The references I've found online thusfar seem to get too detailed for what is needed for the PE exam. I'm...

All, I have what I think may be a really basic question but it keeps tripping me up. When is the conjugate of the current used with the formula S=VI*? The 3 phase equations S=sqrt(3)VI and S=3VI don't seem to use the conjugate, but I don't know why. I've also run into some single phase...

This problem gives the following information regarding two parallel transformers: Impedance of T1 = 5.25%, Impedance of T2 = 4.75%, total current =11,500A. The question then asks for T1's current contribution. I get: I = 11500*(0.0525/(0.0525+0.0475) = 6037.5A However, the answer provided...

Can anyone recommend a good (preferably free) reference for demand and reliability topics? I've searched the web but haven't found anything concise and useful. I'm looking for something including definitions related to load and demand, MUT/MDT/MTBF, etc. Thanks!