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Two 3-limb, 3-phase delta-star connected transformers are supplied from the same source. One of the transformers is of Dy 1 and the other is of Dy 11 connection. The phase difference between the corresponding phase voltages of the two secondaries would be
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- 0°
- 30°
- 60°
- 120°
Correct Option: C
The connection D of 1 signifies that secondary phase voltage lags the corresponding primary phase voltage by 30°; and connection Dy 11 signifies that secondary phase voltage leads the corresponding primary phase voltage by 30°. Thus phase difference between corresponding phase voltages of the two secondaries would be 60°.
