2081 ChaitraChapter 2: Transformer2.7 Transformation of Impedances, Voltage Regulation
Define referred quantities in transformer. Derive the expression for the referred quantities (voltage, current, impedance) in a transformer.
Transformer
ENEE 202 · Chapter 2
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Transformer
Transformation of Impedances, Voltage Regulation
2 questions- 2081 ChaitraChapter 2: Transformer2.7 Transformation of Impedances, Voltage Regulation
A single phase, 100kVA, 2000/200 V, 50Hz transformer has an impedance drop of 10% and resistance drop of 5%. Calculate;
a) The regulation at full load 0.8 power factor lagging.
b) The value of power factor at which regulation is zero.
Losses and Efficiency of 1-Phase Transformer, All Day Efficiency
1 question- 2081 ChaitraChapter 2: Transformer2.11 Losses and Efficiency of 1-Phase Transformer, All Day Efficiency
Daily loading of a 150 kVA transformer having iron loss of $400\ \text{W}$ and full load copper loss of $1700\ \text{W}$ is given below.
Time Load (kW) Power factor 6:00 – 10:00 50 0.9 10:00 – 17:00 60 0.85 17:00 – 21:00 70 0.8 21:00 – 6:00 10 0.95 Determine the all-day efficiency of the transformer.
Tests: Polarity Test, Open Circuit Test, Short Circuit Test, Sumpner's Test
2 questions- 2082 KartikChapter 2: Transformer2.12 Tests: Polarity Test, Open Circuit Test, Short Circuit Test, Sumpner's TestClick to unlock premiumSee the full question with a premium plan
- 2082 KartikChapter 2: Transformer2.12 Tests: Polarity Test, Open Circuit Test, Short Circuit Test, Sumpner's TestClick to unlock premiumSee the full question with a premium plan
Parallel Operation of Transformer: 1-Phase and 3-Phase
1 question- 2082 KartikChapter 2: Transformer2.17 Parallel Operation of Transformer: 1-Phase and 3-PhaseClick to unlock premiumSee the full question with a premium plan