Overload estimation of transformers connected in delta-delta fashion

Q.  Consider three transformers connected in delta-delta fashion and supplying their rated load. Now if one of the transformer is removed then each of the remaining two transformer is overloaded. The overload on each transformer is given as
- Published on 30 Oct 15

a. 1
b. 1.232
c. 1.732
d. 1.872

ANSWER: 1.732

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