Question-3

Consider the three single-phase two-winding transformers shown in Figure. 2. The

high-voltage windings are connected in Y.

(a) For the low-voltage side, connect the windings in A, and label the terminals a,

b, and c in accordance with the American standard.

(b) Relabel the terminals as a', b', and c' such that VAN is 90 out of phase with

Va'n for positive sequence.