A single-phase transformer with a 2-kVA rating has a 480-V primary and a 120-V secondary. Determine the primary and secondary full-load currents of the transformer.

Question

RRB Paper · Accepted Answer

To determine the primary and secondary full-load currents of the transformer, we can use the formula:

I = P / (V × PF)

where I is the current, P is the apparent power, V is the voltage, and PF is the power factor.

Since the transformer is single-phase and has a 2-kVA rating, the apparent power is 2 kVA. The primary voltage is 480 V and the secondary voltage is 120 V.

Primary full-load current:

I1 = 2,000 VA / (480 V × 1 PF) = 4.17 A

Secondary full-load current:

I2 = 2,000 VA / (120 V × 1 PF) = 16.67 A

Therefore, the primary and secondary full-load currents of the transformer are 4.17 A and 16.67 A, respectively.

So, the correct answer is 4.17 A and 16.67 A.

A single-phase transformer with a 2-kVA rating has a 480-V primary and a 120-V secondary. Determine the primary and secondary full-load currents of the transformer.

4.17 A and 16.67 A

10 A and 13. 2 A

6 A and 16.67 A

Insufficient Data

The correct answer is `No. 1: 4.17 A and 16.67 A`

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A single-phase transformer with a 2-kVA rating has a 480-V primary and a 120-V secondary. Determine the primary and secondary full-load currents of the transformer.

4.17 A and 16.67 A

10 A and 13. 2 A

6 A and 16.67 A

Insufficient Data

The correct answer is No. 1: 4.17 A and 16.67 A

The correct answer is `No. 1: 4.17 A and 16.67 A`