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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
322 Shipboard Electrical Power Systems
For example, a motor with a design temperature rise of 80°C in 40°C ambient air, the
design average operating temperature of the coils would be 40 + 80 = 120°C, so the
insulation must be rated for 130°C (Class B) to allow a 10°C margin for local hotspot.
If the motor is operating in the boiler room with 65°C ambient air, then its tem-
perature rise must be limited to 55°C, so that the operating temperature does not rise
above the 120°C design limit. For this, the motor horsepower must be appropriately
selected and derated for higher ambient temperature.
Safety in arc welding and metal cutting: For manual arc welding, metal cutting,
or other processes requiring hands-on operations, the industry ...
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Publisher Resources

ISBN: 9781439828175