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A single-phase two stage sequence controller is designed to work on 230 V supply, and upper and lower current ratings must be 20 A and 21 A respectively. Find the transformer rating.

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in Power Electronics by (27.1k points)
A single-phase two stage sequence controller is designed to work on 230 V supply, and upper and lower current ratings must be 20 A and 21 A respectively. Find the transformer rating.

(a) 230 VA

(b) 4600 VA

(c) 9430 VA

(d) 9200 VA

The question was posed to me in final exam.

Origin of the question is Sequence Controller in section Voltage Controllers of Power Electronics

1 Answer

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by (45.1k points)
The correct choice is (c) 9430 VA

The explanation: Transformer rating is Vs(I1 + I2).

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