Question 3.25: A 10 kVA 440/220 V, 50 Hz single-phase transformer gave the ...
A 10 kVA 440/220 V, 50 Hz single-phase transformer gave the following test results when both the following tests were conducted on the high-voltage side:
Open circuit test : 440 V, 1.0 A, 100 W
Short circuit test : 20 V, 22.7 A, 130 W.
Using the test data, calculate the efficiency and voltage regulation at 0.8 power factor lagging.
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