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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...

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

Ques: A 3 phase induction motor draws 28A at no load and 92A at full load. What is the power factor of the motor at half load?

Can someone share what the voltage relationship will be for an ideal transformer with two secondary windings and one primary windings. I know for current it is Np * Ip = (Ns1 * Is1) + (Ns2 * Is2) Thanks

Power system analysis by grainger provides the formula (1.55) P.U Impedance =[ (actual impedance, ohm) x (base KVA)] / [(base voltage, Kv)^2 * 1000] If you do a derivation for PU Impdance = Zactual/Zbase where Zbase = (Vbase, KV)^2/ (Sbase, KVA) you get thesame result as shown above without...

Can anyone shed any more light why the motor voltage is thesame as that of the dc link other than the explanation offered in the book? I am still not getting it. Thanks

I'm having some confusion with the terms used in these questions and just want to make sure i get this right. So is a phase to phase voltage also the line voltage? I thoght a phase to phase voltage was the phase voltage but working with this assumption i got the answers wrong. Will appreciate...

Can anyone shed any more light on this topic? Any inputs will be appreciated. Just now realizing there was a seperate forum for electrical on the website. http://engineerboards.com/index.php?showtopic=12884

Anyone bought the updated book recently?? Suppossedly it has now been updated to match the new exam format. I bought the old edition a few months back and ended up returning it because it did not match the new exam format. Before i make another investment, i just wanted to get feedback from...

For those who already passed the PE power exam, can you recommend any books, articles, sample questions or anything that one can use to help tackle the power flow problems for the exam. It has been very difficult to find any sample problems in this area and the textbooks are more detailed and...

Has anyone taken testmasters recently for the PE power exam? If so can you share thoughts and recommendations. Thanks

Is anyone familiar with what the policies are if in GA if u decide not to take the PE exam on the next offering date? I did not make the April 2010 exam and i will like to skip the November 2010 and take it again in April 2011. I could not find any helpful information on the website. Thanks