Power Generation Flashcards
What are the three basic items do we need to generate power?
1- PRIME MOVER
(A gas turbine, Steam turbine, Diesel engine)
2- AC generator also known as an ALTERNATOR
3- A SWITCHBOARD
Main supply systems
•Usually a minimum of four generations with a SUPPLY BREAKER in its own switch board section with its own BUS-BARS, linked by a BUSBAR LINKING BREAKER.
Main supply Systems
•Two switchboards (one fwd and one aft, or one port and one stbd) linked by INTERCONNECTING BREAKERS.
Main supply systems
•Each switchboard has it’s own set of bus bars.
Main supply system
•Bud bars supply power to the Electrical Distribution Centres (EDC) via FEEDER BREAKERS.
Main supply system
EDCs are situated around the ship and contain switches known as moulded case circuit breakers (MCCB)
Main supply systems
Each MCCB feeds power to the ships services.
Distribution systems
- Configured as a ring main.
* The ring main contains a generator or generators.
Major components
Seven major components to the power distribution system:
•Generator
•Supply breaker, Bushbar linking breakers, interconnecting breakers.
•Feeder breaker
•Electrical Distribution centres
•Fuse panels
•transformers
Distribution system
Power
- When the ship is alongside we get power from shore generators using shore cables.
- Ships can also take power from other ships using cables connected between power boxes in each ship.
Number of generators is dependent on the the class of ship so what is it for T45 and T23.
T45- has four.
T23- six plus an emergency generator.
