List seven breakers found on a type 23 electrical distribution system.
Supply breaker
Interconnecting breaker
Shore supply/Ship supply breaker
Electric motor breaker
Motor Generator feeder breaker
Motor Generator Supply breaker
Diesel Generator alternative supply breaker
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What is the purpose of the generator test box and where is it connected ?
It is used to test and trial the generators using different loads and is connected forward and aft of the 600V bus bars.
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What is the purpose of the converter regulator ?
It steps up 600V to 750V used for propulsion.
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What are the 3 types of EDP and state their characteristics.
Type 1- circuit fed directly off normal, circuit fed directly off alternative, multiple circuits fed off normal/alternative as switched, made up of ACOS/ROCOS
Type 2- multiple circuits fed from Normal/Alternative as switched.
Type 3- Has a single input fe
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What is meant by the term shedable ?
Shedable EDP's are used to dump supply to un-necessary equipment and redirect it to propulsion systems in emergency situations.
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What is an alternative way we can produce 450V ?
We can reconfigure a 600V generator to 450V using a 4 position switch located on the back of the switchboard.
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