Recent content by kduff70

I was working this problem from a PE example exam and I was  stuck on how the solution to the problem for find the phase current was formulated. I understand the vector property but how was this equation formed to find the phase current has me stuck. thank you for any help on this I have ...

I was going over problem 537 of the Pe sample exam . To get a good understanding of this question would the  Icharging current flow through the line length of a conductor  acting as shunt capacitor to ground therefore the line length , the voltage to ground and the radius of the conductor would...

thank you very much this was an eye opener

Do anyone  know how to solve for Line voltage in a delta configuration see attachment please

thank you this was the way I thought this problem would have work out by finding the Eg  but the way  the problem was work on the solution had me confused

RG1 any better understanding of the problem?

I attach the Kaplan solution to help make sense of the question

I have been working problems for the PE test in October and came across this problem in Kalpan  practice problem. Do anybody have a good ideal on how to solve this problem. Kaplan has a formula but it doesn't seem to work .  I have attached the problem . any help on this one will be greatly...

Thank you all but I have finally figure it out . I agree with TNPE the base method is the best approach. I attach my hand written calculation to show how I came up with  the answer . When finding the Vbase of the motor  I took the Vbase of T1 over The ratio of T2 and I get the Vbase of the motor...

This was a  practice problem for Kaplan  Sample exam  PE Power book  . I thought I would try some of the problem to get practice  but I never came across a V base problem Like this one  and it just has me stuck . All other Vbase problem I seem to get from other books .  I haven't seen this type...

I Thank all you  for your help on this I understand finding the impedance in pu , but it just stuck on the beginning step of establishing the V base as 11.1775V .  This part has me stuck, For some reason. Is there a way you can show me a step by step approach on just how you were able to get...

Thank you  Omer, I get what your saying if to take base voltage coming from the primary side of T1 you would use the ratio (220/25) but when you get to T2 the ratio is reversed it is not clear to me.  I'm thinking the  voltage base of T1 would be multiplied  by the T2 Ratio (130Sqrt3/13) but...

I'm sorry but can you explain to me  a little more on how the voltage base  for the motor side is calculated. I  don't understand how the voltage base through  transformer 1  is 22(220/25) I thought is should be 22(25/220) if you can explain this part maybe the light bulb in my head will go on...

Here the full Problem  Thank you

Can any help me lock down the concept of Vbase through a transformer ? I have attach a problem from Kaplan PE Power exam. I'm stuck on how they  solve for the base voltage on the motor side of the problem. The have the  solution saying Vbase = 22 (220/25) (13/sqrt3*130) give you 11.1775 as the...