designated as a source of casualty power to the
riser terminal by number.
Upon receiving this information, damage control
central orders the repair parties concerned to rig
casualty power from the equipment to the
designated source.
Repair parties rig casualty power and report each
section completed to damage control central.
After all sections have reported the rigging
completed, damage control central requests the
main engine control electrical officer to
energize casualty power.
Upon receiving the request to energize, main
engine control or the electrical officer directs the
designated switchboard to connect and energize
casualty power, and to report compliance.
The Electricians Mate on the designated
switchboard rigs the first cable from the source
of the system, closes the casualty power circuit
breaker, and reports casualty power energized to
main engine control, then reports compliance to
damage control central.
UNRIGGING CASUALTY POWER
Unrigging casualty power can be hazardous if not
handled correctly.
The steps to be taken to unrig
casualty power lines are as follows:
1.
2.
3.
4,
5.
Damage control central requests main engine
control to de-energize the casualty power
system.
Main engine control directs the designated
switchboard to de-energize and disconnect
casualty power, and to report compliance.
The Electricians Mate at the switchboard opens
the casualty power circuit breaker, unrigs both
ends of the first portable cable, and reports
casualty power de-energized, to main engine
control.
Main engine control reports
compliance to damage control central.
Upon receiving the de-energized reprt, damage
control central orders casualty power
disconnected at the equipment,
The repair partys Electricians Mate
disconnects both ends of the last portable cable
in the system at the load and reports, when
completed to damage control central.
6.
7.
Damage control central requests main engine
control to energize normal circuits to the
equipment and orders repair parties concerned
to unrig and restore the remainder of the portable
cables.
Main engine control directs the designated
switchboard to energize all normal circuits to the
equipment and to report compliance. Main
engine control reports compliance to damage
control central. The exercise is not considered
completed until damage control central receives
the report the equipment is operating on normal
power and all portable cables are restored on
their proper racks.
Speed is desirable in all casualty power operation;
however, safety precautions must never be sacrificed to
attain speed. A thorough knowledge of the casualty
power system and frequent drills by all personnel
involved are necessary for safe and expeditious results.
SHORE POWER
The number and locations of shore power
connections vary on different types of ships. Shore
power connections are provided at, or near, a suitable
weather-deck location to which portable cables from the
shore or from ships alongside can be connected to
supply power for the ships distribution system when the
ships service generators are not in operation. This
connection also can be used to supply power from the
ships service generators to ships alongside.
Shore-power arrangements and hardware used on
both ship and shore installations are so diversified that
no specific installation instructions can be outlined in
detail. Ashore installation that has one circuit breaker
supplying a number of cable sets presents a particular
hazard. In this case, you can verify phase rotation and
phase orientation only by energizing all shore terminals.
You should check phase rotation with only one set of
cables installed. The latest designs have a single,
3-phase receptacle for ship and shine-power terminals.
These receptacles are keyed in such a manner that phase
rotation and orientation cannot be altered provided both
the ship and shore use these receptacles, and the cables
are not spliced. Phase orientation need not be checked
before hookup. Systems that use 3-phase receptacles
are normally designed so that interlocks on receptacles
automatically trip associated circuit breakers whenever
the cover of the receptacle is open, and a shore-power
cable plug is not in place. However, you should still
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