Advantages of per unit computations

Q.  Which among these is the major advantage of per unit computations?
- Published on 09 Oct 15

a. Per unit impedance of transformers is the same referred to either side of it.
b. For simulating steady state and transient models in the computer this method is very useful.
c. Manufactures usually specify the impedance of an apparatus in per unit system.
d. All of these

ANSWER: All of these

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