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Systems
TYPICAL AC GENERATOR (GEN-SET)
OVERVIEW
The diesel generator (gen-set) is used to provide on board
alternating current (AC) when the vessel is unplugged from
the dockside cord. Generator frequency known as hertz is
domestically set at 60 while overseas countries normally
require a setting of 50. As the generator reaches full rated
no load output (amps) at 60 hertz it should display 120
volts. At 50 hertz it should display 230 volts.
The generator is located in the port engine room. Some
basic system components are identifi ed below.
MUFFLER
SOUND ENCLOSURE
TYPICAL GENERATOR
FEED
FUEL FILTER
PORT 46SC FUEL TANK SHOWN
Typical Generator Fuel System
The generator is supplied by the same fuel tanks as the
engines. The generator fuel and return valve are normally
marked for identifi cation purposes. The feed valve features
off and on positions. “Off ” position is 90 degrees
perpendicular to the valve.
“On” position is in line with the valve as shown above.
The return generator valve is located on the forward top
of the port fuel tank. Familiarize yourself with the location
of all equipment and valves.
Note: Normally the generator feed and return use a 3/8
inch barb located on the fuel tank.
The fuel system features an in-line remote fuel fi lter located
below the generator. It’s job is to keep fi ne particles and
water out of the generator fuel injection system. Refer to
the vendor information for periodic maintenance schedules.
Clean fuel is the life line of diesel engine performance.
The generator features a sound enclosure which reduces
noise and enables quick access for most inspections,
troubleshooting and routine maintenance.
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