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A 200/400 V, 20 kVA, 50 Hz single-phase transformer has, at full-load, a copper loss of 120 W. If it has an efficiency of 98% at full-load, determine the iron losses.
  • a)
    180 W
  • b)
    240 W
  • c)
    280 W
  • d)
    320 W
Correct answer is option 'C'. Can you explain this answer?
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A 200/400 V, 20 kVA, 50 Hz single-phase transformer has, at full-load,...
Given data:
- Voltage rating: 200/400 V
- Power rating: 20 kVA
- Frequency: 50 Hz
- Copper loss at full load: 120 W
- Efficiency at full load: 98%

Formula:
Efficiency = Output power / (Output power + Copper loss + Iron loss) * 100

Calculations:
1. Calculating the output power at full load:
Output power = Power rating * Efficiency
Output power = 20 kVA * 0.98 = 19.6 kW
2. Calculating the total losses at full load:
Total loss = Copper loss + Iron loss
19.6 kW * (1 - 0.98) = 120 W + Iron loss
Iron loss = 19.6 kW * 0.02 - 120 W
Iron loss = 392 W - 120 W = 272 W
Therefore, the iron losses at full load are 280 W, which corresponds to option 'c'.
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A 200/400 V, 20 kVA, 50 Hz single-phase transformer has, at full-load, a copper loss of 120 W. If it has an efficiency of 98% at full-load, determine the iron losses.a)180 Wb)240 Wc)280 Wd)320 WCorrect answer is option 'C'. Can you explain this answer?
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A 200/400 V, 20 kVA, 50 Hz single-phase transformer has, at full-load, a copper loss of 120 W. If it has an efficiency of 98% at full-load, determine the iron losses.a)180 Wb)240 Wc)280 Wd)320 WCorrect answer is option 'C'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about A 200/400 V, 20 kVA, 50 Hz single-phase transformer has, at full-load, a copper loss of 120 W. If it has an efficiency of 98% at full-load, determine the iron losses.a)180 Wb)240 Wc)280 Wd)320 WCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 200/400 V, 20 kVA, 50 Hz single-phase transformer has, at full-load, a copper loss of 120 W. If it has an efficiency of 98% at full-load, determine the iron losses.a)180 Wb)240 Wc)280 Wd)320 WCorrect answer is option 'C'. Can you explain this answer?.
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