A 100-kVA, 4800-480-V, 60-Hz, single-phhase distributión has 6 V/turn and an equivalent impedance referred to the high side of 8.48/71° 0. The transformer is operating in the step-down mode supplying a 50-kVA, unity power-factor load at 480 V. Determine (a) the output volt- age when the load is removed; (b) the inherent voltage regulation of the transformer when operating at 78 percent power-factor lagging. Note: By definition, inherent voltage regulation infers rated kVA.

A 100-kVA, 4800-480-V, 60-Hz, single-phhase distributión has 6 V/turn and an equivalent impedance referred to the high side of 8.48/71° 0. The transformer is operating in the step-down mode supplying a 50-kVA, unity power-factor load at 480 V. Determine (a) the output volt- age when the load is removed; (b) the inherent voltage regulation of the transformer when operating at 78 percent power-factor lagging. Note: By definition, inherent voltage regulation infers rated kVA.

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 3.14P: A single-phase 50-kVA,2400/240-volt,60-Hz distribution transformer is used as a step-down...

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