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  1. S

    Electrical: Power PE Exam Study Materials

    All items sold EXCEPT #1
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    Electrical: Power PE Exam Study Materials

    Hi All, I just passed the PE exam so I'm selling the following materials. Priced to sell. I'll also donate 10% of the proceeds to this forum as a thank you. 1) Electrical Machines, Drives, and Power Systems (5th Edition); Theodore Wildi Condition: Decent condition, some handwritten notes...
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    NCEES #540

    Do we need to convert all per unit impedances to a common base? It doesn't look like we do.
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    NEC Power Exam 114

    Hi All, I'm having a hard time understanding the problem and what is given/being asked. We are given an AC voltage of 679 V. Is this the RMS Line to Line voltage (or average or peak)? How do we know that this is equal to the load Peak Line to Line voltage? I've been tring to figure this out...
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    Graffeo Ex 51 - Using MVA Method

    W9TWJ, Where did you get that 1000 from (in red above)? Shouldn't that be the line to line voltage (230kV)?
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    Graffeo Ex. 18 Per Unit

    We only changed the base of each zone because it was specified in the problem correct? What is the advantage of doing this? Would it not be easier to simply use the transformer ratings as base values? For example, using T1 values as base, we would get, for the generator: x_pu =...
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    Problem 530 (NCEES)

    Sorry for bringing an old thread back to life, but what is the significance of the problem statement "Assuming the transformer and the 12.47KV system have the same X/R ratio... "? What if this were not the case?
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