problem with this calculation see if i am right. or they posted it wrong
Using the given information, determine the approximate short circuit current available at the transformer secondary: 13,800-277Y/480V, 2500 kVA, 5% Impedance
first should be 480Y/277 not 277y/480.
basically this would be the calculation. I= (2500*1000)/(480*1.732)= 3007.08
z= (100/5)= 20
short circuit = 3007.08*20= 60189
so i would just go with the closest answer correct? and also they should fix the error on 277Y.
I work it out to the same answer. Seems you did it right and I would go for the closest answer.
Originally Posted by rasilva
The questions clearly states "determine the approximate short circuit current". Go with the closest answer.
Originally Posted by madMAX
yes sir but its wrong wording that what confused 277y/480 doesn't exist, 480y/277 exist
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