5/1/2015
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Starting and Stopping of Diesel Engine Generator Sets in
Ships
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May 25, 2014 8:08 pm | Leave a Comment | Frozee
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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
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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
The ENG CONTROL switch on GECP /Local gives a choice of control position; LOCAL position
Scavenge Port Inspection onboard
places GECP /Local in control, and REMOTE position transfers control to MSB.
Ships
Control From Main Switch Board
Operation of Freshwater Generator with
Each diesel engine is ready for control from MSB when all of the following conditions are met:
Shell and Tube Freshwater Generator
1. 24 volt DC power is supplied to the control circuitry.
2. The turning bar is stored in the specified position.
Jacket Cooling Water
Testing of Water Mist Fire Fighting
System onboard Ships
3. The starting air valve is OPEN.
Maintenance of Water Mist Fire Fighting
4. The handle switch is positioned to RUN.
5. ENG CONTROL switch on GECP /Local is selected to REMOTE.
System
6. Each engine abnormal stop alarms are reset (alarm lamps are provided on GECP /Local).
Water Mist Fire Fighting System
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
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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.
Categories
Air Conditioning Boilers
Diesel
Engines Fire Detectors
Compressors
Fire Fighting Forms
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Posted in: Diesel Engines, Marine Electrical Technology, Motor Engineering Knowledge | Tagged: diesel engine
Refrigeration Safety
generator, diesel generator, diesel generator in ships, ship power production, starting of diesel generators, stopping
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May 2015
Operation of Circuit Breakers on Main Switch Board in
Ships
May 24, 2014 11:31 pm | Leave a Comment | Frozee
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Marine Engineering Study Materials - Page 12 of 89 - www.marineengineeringonline.com
Apr
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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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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