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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
240 Shipboard Electrical Power Systems
10.2 OVERLOAD PROTECTION
The fuse and circuit breaker clears fault only if the overcurrent is greater than 200%
of its own rated current. That leaves a protection gap between 115% overload allowed
in most equipments for an hour or two and 200% overload. This gap is bridged by
the overload protection. In its simplest and often used form shown in Figure10.6,
it consists of a pair of bimetallic links that remains closed in normal operation, but
deforms differentially to open the contacts when overheated.
Ambient Temperature
% of Nominal Rating
–50
80
60
100
40
120
0 25 –25 50 75 100°C
Standard and fast-acting fuses ...
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Publisher Resources

ISBN: 9781439828175