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A 220 V, 60 Hz single-phase transformer has hysteresis loss of 340 watts and eddy current loss of 120 watts. If the transformer is operated from, 230 V, 50 Hz supply mains, then total core-loss, assuming steinmetz’s constant equal to 1.6 will be _______ w .
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- 119.3 watt
- 539.3 watt
- 51.3 watt
- None of the above
Correct Option: B
| = | |||
| V2 | f2 Bm2 |
| ∴ | = | . | |||
| 230 | 50 | Bm2 |
⇒ Bm2 = 1.255 Bm1
| ∴ Ph2 = Ph1 × | |
| f1 Bxm1 |
| = 340 × | (1.255)1.6 = 408.0 watts | |
| 60 |
| Pe2 = Pe1 × |  |  | 2 | |
| f1 .Bm1 |
| = 120 × | | × 1.255 | | 2 | = 131.3 watts | |
| 60 |
Total loss= Ph2 + Pe2 = 408 + 131.3 = 539.3 watt.
