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 TM 55-1905-223-24-3
SECTION II. EQUIPMENT DESCRIPTION AND DATA
1-6. General Description. The ship's service generator sets are made up of a 300 hp engine and a 250 kW
power unit. Elements of the generator sets include the following: the air induction system, lubrication system,
cooling system, exhaust system (air piping and water cooled manifold), fuel system, fuel check valves, and the
electrical system. An electric starting motor supports one generator set, while an air starter is provided for the
second.
1-7. Characteristics, Capabilities, and Features. A very broad view of the ship's service generator set is as
follows:
a. Characteristics.
(1) Characteristics. The NTA 855-GC is a 300 HP, in-line, 6 cylinder, water cooled diesel engine
designed for marine use.
(2) Capabilities and Features.
(a) Prime mover for ship's service generator.
(b) Cooling system designed for keel cooling.
(c) Equipped with remote and local control stations.
(d) Aftercooled intake manifold.
b. Generator.
(1) Characteristics. Each ship's service generator is a 250 kilowatt, 240 volt, 60 Hertz, 3 phase
mechanically (engine) driven power unit.
(2) Capabilities and Features.
(a) Brushless exciter.
(b) Continuous use.
(c) Remote, automatic synchronization controls.
(d) Provides the ship's primary electrical power.
(e) Self-ventilating cooling.
1-8. Location and Description of Major Components. Figure 1-1 shows views of each side of the generator
set with the locations of major components indicated. Refer to Figure 1-1 and the reference number key for the
description of these components.
1-2
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