Recent content by Gnana

Be familiar on how to do voltage drop calcultions.

I finally passed the PE - power. Thanks to all on here. This was the most helpful resource i had. I also want to add a special thank you to Cableguy.

I finally passed the PE - power. Thanks to all on the EB.com especially to Cableguy.

Any better explanation, guidance to answering this question?

I don't believe so. You should take a look at the syllabus in the NCEES PE power sample question booklet. These topics are not included.

Boy oh boy am i lost.... How did u conclude the rotor is driven in the opposite direction? And since i did not grasp the concept yet, i don't know what will happen if it's a 6 pole machine.

A 3 ph, 4 pole synchronous motor and a 3 ph 4 pole slip ring induction motor are mechanically coupled. Their stators are also connected to a balanced 3 ph 60 hz supply. A 3 ph resistive load is connected across the slip rings. The frequency of the current in the resistive load is? a)30Hz b)60Hz...

Thank you Dark knight!!

Dark Knight, do u still have this question and solution available? I will like a copy. Thanks

Problem 18 Per 2008 NEC code section 430.32(1), for motors with service factor 1.15 or greater 1.25 * 28 = 35A and not 1.4 * 28 = 39.2A as indicated. Problem 19 Per 2008 NEC code section 430.32(1) for motors with temp rise over 40 deg, all other motors 1.15 * 26 = 29.9 and not 1.3 *26 = 33.8

Be careful with this article, example 18 and 19 are also incorrect.

The example number 11 " What is the ampacity of a #10 ZW2 conductor in a raceway with 5 current carrying conductors?" They have an answer of 32 amps. Does anyone think it's incorrect? I got 30amps ( see table 310.16 and 240.4D) X 0.8 (see table 310.15.B.2.a) = 24amps

The linke below might be a starting point http://www.mpoweruk.com/performance.htm

Any suggestions where to find sample problems on this topic? Or anyone has some sample problems they could share? Thanks

I hope it does not make it to the PE but best be prepared than sorry u didn't. I am still struggling to understand the algerbraic soloution. Can you clarify what u meant by {"This means at full load, you have a phasor magnitude of 92 amps, with a j28 reactive component, along with an 87.x...