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Shipboard Electrical Power Systems
book

Shipboard Electrical Power Systems

by Mukund R. Patel
December 2011
Intermediate to advanced content levelIntermediate to advanced
370 pages
12h 24m
English
CRC Press
Content preview from Shipboard Electrical Power Systems
162 Shipboard Electrical Power Systems
Problem 6.12: A 1-ph, 100 kVA, 460/120 V transformer with 3% R and 6% X
is powering a 3-kW heater. Determine the total continuous circuit imped-
ance in ohms looking from the source side, and the current drawn from
the source.
Problems 6.13: Determine a 3-phase 480 V/208Y-120 V transformer kVA
rating if the daily variations in the secondary load current are 150 A for
5 h, 170 A for 1 h, and 130 A for 18 h, taking into account the service fac-
tor of 1.15 for 2 hours. Allow 30% margin for future growth.
QUESTIONS
Question 6.1 Explain the difference between power transformer, voltage
(potential) transformer, and current transformer.
Question 6.2 Why doesn’t the 3-phase transformer need the 4th core ...
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Publisher Resources

ISBN: 9781439828175