In the example, what ratio is used to convert 4160 V to 416 V with a potential transformer?

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Multiple Choice

In the example, what ratio is used to convert 4160 V to 416 V with a potential transformer?

Explanation:
Potential transformers reduce high line voltages by a turns ratio. The secondary voltage equals the primary voltage divided by the turns ratio (Np/Ns). A ratio of 10:1 means ten turns on the primary for every one on the secondary, so the secondary voltage is one-tenth of the primary. Therefore 4160 V becomes 416 V when using a 10:1 ratio. The other ratios would produce different voltages: 5:1 would give 832 V, 1:10 would step up to 41,600 V, and 4:1 would yield 1,040 V.

Potential transformers reduce high line voltages by a turns ratio. The secondary voltage equals the primary voltage divided by the turns ratio (Np/Ns). A ratio of 10:1 means ten turns on the primary for every one on the secondary, so the secondary voltage is one-tenth of the primary. Therefore 4160 V becomes 416 V when using a 10:1 ratio. The other ratios would produce different voltages: 5:1 would give 832 V, 1:10 would step up to 41,600 V, and 4:1 would yield 1,040 V.

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