ELECTICAL EQUIPMENT Flashcards
Electrical Distribution system on the CVN-71:
Equipped with an UNGROUNDED, 4160 VAC Ring Bus Electrical Distribution System.
How many Electrical Zones?
9
How many Load Centers onboard?
32
How many Out of Load Centers?
9 General Load Centers
15 Functional Load Centers
9 General Load Center Feeds:
Ventilation
Lighting
Receptacles
15 Functional Load Centers Feed Specific Equipment?
ACEs
A/C Plants
Fire pumps
Who authorized all work on Energized equipment?
CO
What are the Major Electrical components?
Automatic Bus Transfer
Manual Bus Transfer
Casualty Power
Major Electrical Components
Automatic Bus Transfer:
Feeds vital equipment or lighting (Medical, Fire Pumps, Steering, AFFF station)
Automatically transfer from normal power to emergency upon loss of power.
Major Electrical Components
Manual Bus Transfer (MBT):
Feeds vital equipment:
Ventilation
Combat systems equipment
Major Electrical Components
Casualty Power:
Used to provide emergency power to vital equipment due to battle damage of primary and alternate sources
The seven 400 HZ Loads are:
Fire Control Systems
NSSM Launcher
Gyrocompass
Aircraft Electrical Servicing Station
Radars
FWD/AFT IC Switchboards
What is the Degaussing ?
To counteract ship’s magnetic field
What are the 2 types of magnetic fields ?
Induced and Permanent
2 types of magnetic field are based on?
Where the ship was built
Type of metal used for the ship
Direction of the ship’s heading and geographical location on earth
