Data obtained from short-circuit and open-circuit tests of a 240-kVA, 4800 /240-V, 60-Hz transformer are: Open-circuit test, Short-circuit test, low-side data high-side data Vị = 240 V Io = 10 A Po = 1440 W Vsc 187.5 V Isc 50 A Psc = 2625 W a) Determine the parameters of the equivalent circuit. b) Considering the full load at 0.8 PF lagging, obtain: Load current referred to primary and secondary. ii. Primary no-load current iii. Primary input iv. Primary input voltage i. urrent Voltage regulation vi. Transformer efficiency c) What is the load kVA for maximum efficiency and the maximum efficiency at 0.8 power factor? V.

Data obtained from short-circuit and open-circuit tests of a 240-kVA, 4800 /240-V, 60-Hz transformer are: Open-circuit test, Short-circuit test, low-side data high-side data Vị = 240 V Io = 10 A Po = 1440 W Vsc 187.5 V Isc 50 A Psc = 2625 W a) Determine the parameters of the equivalent circuit. b) Considering the full load at 0.8 PF lagging, obtain: Load current referred to primary and secondary. ii. Primary no-load current iii. Primary input iv. Primary input voltage i. urrent Voltage regulation vi. Transformer efficiency c) What is the load kVA for maximum efficiency and the maximum efficiency at 0.8 power factor? V.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.28MCQ

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