age ratio? Pro B/ A 50 KVA, 2300/230 V, 60 Hz transformer has a high voltage winding resistance of 0.652 and a low-voltage winding resistance of 0.0065 2. Laboratory tests showed the following results: Open circuit test: V = 230 V, I -5.7A, P = 190 W Short circuit test: V-41.5 V, 1-21.7 A, P-No wattmeter was used. 18 (a) Compute the value of primary voltage needed to give rated secondary voltage when the transformer is connected as a step-up one and is delivering 50 KVA at a power factor of 0.8 lagging. (b) Compute the efficiency under conditions of part (a).

age ratio? Pro B/ A 50 KVA, 2300/230 V, 60 Hz transformer has a high voltage winding resistance of 0.652 and a low-voltage winding resistance of 0.0065 2. Laboratory tests showed the following results: Open circuit test: V = 230 V, I -5.7A, P = 190 W Short circuit test: V-41.5 V, 1-21.7 A, P-No wattmeter was used. 18 (a) Compute the value of primary voltage needed to give rated secondary voltage when the transformer is connected as a step-up one and is delivering 50 KVA at a power factor of 0.8 lagging. (b) Compute the efficiency under conditions of part (a).

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter28: Three-phase Transformers

Section: Chapter Questions

Problem 2PA

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