A 480-V, 60-Hz, Y-Connected synchronous generator, having the synchronous reactance of 1.04 ohm and negligible armature resistance, is operating alone. The terminal voltage at rated field current at open circuit condition is 480V. 1. Calculate the voltage regulation 1. If load current is 100A at 0.8 PF lagging 2. If load current is 100A at 0.8 PF leading 3. If load current is 100A at unity PF 2. Calculate the real and reactive power delivered in each case. 3. State and explain whether the voltage regulation will improve or not if the load current is decreased to 50 A from 100 A at 0.8 PF lagging.
A 480-V, 60-Hz, Y-Connected synchronous generator, having the synchronous reactance of 1.04 ohm and negligible armature resistance, is operating alone. The terminal voltage at rated field current at open circuit condition is 480V. 1. Calculate the voltage regulation 1. If load current is 100A at 0.8 PF lagging 2. If load current is 100A at 0.8 PF leading 3. If load current is 100A at unity PF 2. Calculate the real and reactive power delivered in each case. 3. State and explain whether the voltage regulation will improve or not if the load current is decreased to 50 A from 100 A at 0.8 PF lagging.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Question
A 480-V, 60-Hz, Y-Connected synchronous generator,
having the synchronous reactance of 1.04 ohm and
negligible armature resistance, is operating alone. The
terminal voltage at rated field current at open circuit
condition is 480V.
1. Calculate the voltage regulation
1. If load current is 100A at 0.8 PF lagging
2. If load current is 100A at 0.8 PF leading
3. If load current is 100A at unity PF
2. Calculate the real and reactive power delivered in each
case.
3. State and explain whether the voltage regulation will
improve or not if the load current is decreased to 50 A
from 100 A at 0.8 PF lagging.
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