Calculate also the currents

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 3.54P: An infinite bus, which is a constant voltage source, is connected to the primary of the...
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1. A 3-phase, star-connected alternator generates 6,360 V per phase and supplies 500 kW at a
p.f. 0.9 lagging to a load through a step-down transformer of turns 40:1. The transformer is
delta connected on the primary side and star-connected on the secondary side. Calculate the
value of the line volts at the load. Calculate also the currents in (a) alternator windings (b)
transformer primary windings (c) transformer secondary windings.
[476 V (a) 29.1 A (b) 16.8 A (c) 672 A]
Transcribed Image Text:1. A 3-phase, star-connected alternator generates 6,360 V per phase and supplies 500 kW at a p.f. 0.9 lagging to a load through a step-down transformer of turns 40:1. The transformer is delta connected on the primary side and star-connected on the secondary side. Calculate the value of the line volts at the load. Calculate also the currents in (a) alternator windings (b) transformer primary windings (c) transformer secondary windings. [476 V (a) 29.1 A (b) 16.8 A (c) 672 A]
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