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5/1/2015 Marine Engineering Study Materials - Page 12 of 89 - www.marineengineeringonline.com
http://marineengineeringonline.com/page/12/ 1/5
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Starting and Stopping of Diesel Engine Generator Sets inShipsMay 25, 2014 8:08 pm | Leave a Comment | Frozee
The power plant of a ship normally consist of three diesel generators driven by diesel engines. One
generator is normally used when the ship is at the sea while more sets of diesel generators are
employed during entering or leaving port and during loading or unloading. The diesel generators can
also be set as automatic starting stand-by generators.
Manual Start-Stop Control of Diesel Engines
Starting and stopping operation of the diesel engines can be controlled either from the main switch
board (MSB) synchro panel or from the generator engine control panel (GECP / Local) located near
generator.
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5/1/2015 Marine Engineering Study Materials - Page 12 of 89 - www.marineengineeringonline.com
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The “ENG CONTROL” switch on GECP /Local gives a choice of control position; LOCAL position
places GECP /Local in control, and REMOTE position transfers control to MSB.
Control From Main Switch Board
Each diesel engine is ready for control from MSB when all of the following conditions are met:
1. 24 volt DC power is supplied to the control circuitry.
2. The turning bar is stored in the specified position.
3. The starting air valve is OPEN.
4. The handle switch is positioned to RUN.
5. “ENG CONTROL” switch on GECP /Local is selected to REMOTE.
6. Each engine abnormal stop alarms are reset (alarm lamps are provided on GECP /Local).
Fulfillment of the above conditions is identified by lighting of “READY TO START” lamp on synchro
panel (one for each diesel engine).
Starting of Diesel Generator Sets
With “READY TO START” lamp lighting, position “ENG CONTROL” switch on synchro panel to START
; the engine starts. If the engine does not reach 300 rpm or above within 20 seconds of “ENG
CONTROL” switch operation, it will be alarmed on GECP /Local as start failure and “START FAIL”
lamp provided on MSB will be lighted and alarm issued.
Stopping of Diesel Generator Sets
Position “ENG CONTROL” switch to STOP after the generator is disconnected from the MSB bus.
Scavenge Port Inspection onboard
Ships
Operation of Freshwater Generator with
Jacket Cooling Water
Shell and Tube Freshwater Generator
Testing of Water Mist Fire Fighting
System onboard Ships
Maintenance of Water Mist Fire Fighting
System
Water Mist Fire Fighting System
Alexa Rank
Categories
Air Conditioning BoilersCompressors DieselEngines Fire Detectors
Fire Fighting Forms
5/1/2015 Marine Engineering Study Materials - Page 12 of 89 - www.marineengineeringonline.com
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Posted in: Diesel Engines, Marine Electrical Technology, Motor Engineering Knowledge | Tagged: diesel engine
generator, diesel generator, diesel generator in ships, ship power production, starting of diesel generators, stopping
of diesel generators
Operation of Circuit Breakers on Main Switch Board inShipsMay 24, 2014 11:31 pm | Leave a Comment | Frozee
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5/1/2015 Marine Engineering Study Materials - Page 12 of 89 - www.marineengineeringonline.com
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All Air Circuit Breakers (ACB) can be operated either electrically or manually. There are two operation
methods available.
Electrical Operation
The electrical operation of an air circuit breaker is initiated by an automatic control signal produced in
the main switch board or by manual operation of the corresponding one of breaker control switches;
these control switches are located on the synchro panel of the switch board and marked “ACB
CONTROL”. Pull the breaker control switch knob towards you and turn it clockwise to close the
breaker, or anticlockwise to open the breaker. As soon as the knob is released, it returns to the
central position and is locked in this position.
Manual Operation
Direct manual operation of the air circuit breaker is recommended only for inspection and
maintenance. Pull the manual control lever of the breaker towards you to close and press the trip
button in the breaker front to open.
Molded Case Circuit Breakers (MCCB)
All other circuit breakers used for distribution and load circuit protection purposes are molded case
circuit breakers. These breakers are automatically tripped, should overload or short circuit develop in
their load circuits; the re-establishment of connection can be made easily and safely without need for
replacement of elements such as fuses.
See Also: Main Switch Board Safety
See Also: Main Switch Board
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5/1/2015 Marine Engineering Study Materials - Page 12 of 89 - www.marineengineeringonline.com
http://marineengineeringonline.com/page/12/ 5/5
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Posted in: Marine Electrical Technology, MEO Examination Study Materials | Tagged: acb, air circuit breaker
operation, air circuit breakers, mccb, molded case circuit breakers, operation of air circuit breakers
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