Q) Sketch and describe a 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.