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Question: 1 if the turns ratio of the transformers nin2 is...

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1. If the turns ratio of the transformers (NI/N2) is 600:2000 (0.3), and if they are configured in a Y-Y configuration, and the line to line voltage on the primary is 500 V a. Draw the two diagrams depicting the transformer connections, and the winding voltages b. Are the single phase transformers step up or a step down transformers? (Ans: Step up) c. What is the line to ground voltage on the secondary? (Ans: 963 V) d. What will be the line to line voltage on the secondary? (Ans: 1667 V) 2. If the turns ratio of the transformers is 3, and if they are configured in a Y-Δ configurtion, and the line to line voltage on the primary is 500 V a. Draw the two diagrams depicting the transformer connections, and the winding voltages b. Are the single phase transformers step up or a step down transformers? (Ans: Step down) c. What is the line to ground voltage on the primary? (Ans: 289 V) d. What will be the line to line voltage on the secondary? (Ans: 96.3 V) e. What wll the voltage measurement if the voltage of one of the secondary conductors is measured with respect to ground? (Ans: 55.6 V)
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