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| Q.49 | A 10,000 KVA, 3-phase, star-connected 11,000 V, 2-pole turbo generator has the following losses. (i) Open circuit core loss at 11000 V = 80 kW; (ii) Windage and frictional loss = 40 kW; (iii) Full load armature copper loss = 200 kW; and, (iv) Field copper loss = 90 kW. Ignoring the change in field current compute the percentage efficiency at rated load 0.8 pf leading. | |
| Ans | 1. 86.62 | |
| 2. 88.27 | ||
| 3. 95.12 | ||
| 4. 91.23 |
Correct Ans: 3
