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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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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

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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

and ChecklistsGeneralEngineeringKnowledge Heat

Exchangers Hydraulics Inert Gas

System Instrumentation and

Control Lubricating Oil MarineElectrical TechnologyMEOExaminationStudy MaterialsMotor EngineeringKnowledge Naval

Architecture and ShipConstruction Pumps

Refrigeration Safety andEnvironmental ProtectionSewage Treatment Turbochargers

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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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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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