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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
142 Shipboard Electrical Power Systems
6.3 SELECTION OF KVA RATING
The transformer size (kVA rating) for a given load prole is determined based on the
following factors:
The peak load it would supply, taking into account the NEC load factors if
numerous small loads with intermittent use are connected to it. Large loads
are accounted for their individual on and off timing.
For transformers supplying harmonic-rich power electronics loads, the
additional harmonics heating is accounted for by selecting correct K-rating
(discussed latter).
About 30% margin is then added for the future growth, which will make
the transformer operate at about 1/1.3 = 0.77 or 77% of the rated capacity
until the load grows to full capacity. This indirectly makes ...
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Publisher Resources

ISBN: 9781439828175