complex imaginary test 2 problem 66

Professional Engineer & PE Exam Forum

Help Support Professional Engineer & PE Exam Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
R

rick.conner

Active member
Joined
Sep 29, 2011
Messages
34
Reaction score
0
question reads: "what is the current for a 3-phase, delta-connected, 200kVA load with a power factor of 0.92 if the supplied voltage is 12.5k V?

so I assumed the load is the total 3-phase load and the voltage is L-L. so the line current is I=200kva/sqrt(3)/12.5kV = 9.2A

solutions say that all you need to do is S=VI so I=200kVA/12.5kV = 16. this is only right if the load is per phase correct?

thanks

 
Rick I have the exact same issue with this question, and get the same answer as you, 9.2A = Iline. I believe ComplexImaginary is very wrong with their answer. The only other way to read this question is that they're asking for the current in the delta connected load (phase current). If so the answer would be 9.2 / sqrt(3) = 5.3, which is not an answer choice. The use of S = VI in the solution is simply not correct for this 3 phase problem.

 

Similar threads

Y
PE Power #8
Replies
7
Views
3K
akyip
A
K
PE Exam Question
Replies
1
Views
4K
DLD PE
DLD PE
B
Solving for Fault Current using Square Root 3
Replies
9
Views
5K
Zach Stone P.E.
Zach Stone P.E.
A
A complex load across 2 phases - PPI Exam 1 Question 8 and NCEES Exam Question 110
Replies
0
Views
866
akyip
A
A
3-phase transformer short circuit test: Cram for Exam Vol 2 Question 58
Replies
3
Views
2K
Redy321
R

Latest posts

Back
Top