Q) Sketch and describe a Typical Ships Electrical Distribution System.
Typical Ships Electrical Distribution System
The electrical power
distribution system on board a ship is designed so as to provide a secure
supply to all loads with adequate built in protection for the equipment and
operating personnel. The general scheme of a ship’s electrical power system is
common to nearly all ships.
Both the auxiliary and
emergency services are supplied by the Main generators during normal operating
conditions. In event of emergency, only the emergency services are supplied by
the Emergency generator.
The below figure shows a
typical electrical distribution system of a vessel.
The main generators are
connected to the main bus bar via air circuit breakers. The main bus bar
supplies 440V directly, 220V via transformers and 24V DC via transformers and
rectifiers.
The main bus bar is
connected to the emergency switch board via the tiebreaker. Emergency generator
is also connected to the emergency switch board.
Arrangements are also made
for shore supply to be connected.
