Casualty Power System

1
Casualty Power System

• Lesson Topic 3.7

2
Enabling Objectives

• Select the procedures necessary to control and
  repair damage to shipboard equipment and systems
• Match the following damage control systems with
  their purpose and locations 1. Firemain 2.
  Drainage 3. Ventilation 4. Casualty power

3
Casualty Power System

• Temporary power if permanently installed
  emergency distribution cables are damaged
• Doesnt supply power to all electrical equipment
• Supplies to vital systems and limited facilities
• Supplies to a limited number of ordnance items
  necessary for defense

4
Casualty Power System

• Important features
• Preservation of watertight integrity
• Simplicity of installation operation
• Flexibility of application
• Interchangeability of parts equipment
• Minimum weight space requirements

5
Components and parts

• Terminals
• Aid in rigging casualty power circuits
• Maintain watertight integrity
• Horizontal/longitudinal cable runs
• Cables can be connected to either end of the
  bulkhead terminal

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Terminal
7
Terminal
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Casualty Power System Components and parts

• Phase identification on terminals
• Marked with letters A, B ,and C
• Raised buttons - Corresponds to the phase on
  cable
• Special tool is provided to secure cable
• Viking casualty power terminals
• Casualty power cables can only be connected one
  way due to shape of terminal receptacles
• Secured to terminal by thumb screws

9
Casualty Power System Components and parts

• Cables
• 93 amperes continuous
• 200 amperes for 4 hours
• Additional cable in lengths totaling 150 ft are
  stowed in damage control repair stations

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Cables
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Cables
12
Cables
3 Phases
Thumb screws
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Cables
Thumb screws
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Cable runs

• Small ships
• One horizontal cable run on main deck
• Large ships
• Two horizontal cable runs

15
Phase identification on older cables

• Phase A - One serving, black
• Phase B - Two servings, white
• Phase C - Three servings, red
• Older cables
• Identical to old method but uses O-rings vice
  servings

16
Phase identification on new cables

• One-piece plug in assembly
• Fastened by thumb screws
• Only fit one way
• Installed on DD-963 and CG-47 class ships

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Casualty Power System Components and parts

• Risers
• Vertical conduit with terminal at each end
• Permanently installed or portable cable
• Connection points for cables between decks
• Risers Connection located to provide easy
  connections to vital areas

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Casualty Power System Components and parts

• Vertical risers
• From switchboard compartments
• To power loads
• Total capacity of generator is greater than 500
  kW
• Two vertical port starboard risers provided
• Capacity is less than 500 kW
• One vertical port starboard risers provided

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Responsibility for energizing the system

• DCA determines route
• DCO/Engineering Officer will designate the
  switchboard riser to be used as the source of
  power
• Final energizing connection will be made upon
  direct orders of the DCA

20
Casualty Power System application

• Post signs DANGER HIGH VOLTAGE", at each
  connection at 10 intervals
• load to source

Danger
High
Voltage
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Sequence of Command In Rigging Casualty Power
From To Actions 1. DCC REPAIR
5 Investigate loss
of power to_______ 2. REPAIR 5
DCC All
sources of power
to_____are lost. (Verified) 3. DCC MAIN
CONTROL Secure all sources of
power to _____ 4. MAIN CONTROL DCC
All sources of power to ____
are secured 5. DCC REPAIR 5
All sources of power to ____ are
secured
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Sequence of Command In Rigging Casualty Power
From To Actions 6. DCC
MC
Designate source of power to______ 7.
MC DCC Riser
terminal_____(Source) is source of power to
____(Load) 8. DCC Rep. 5 Rig casualty
power cable from___(Load) to
riser terminal _____(Source) 9. Rep
5. DCC Casualty power cable rigged
from______(Load) to riser terminal
_____(Source) Note Electrical Person in charge
report to DCC
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Sequence of Command In Rigging Casualty Power
From To Actions 10.
Bridge DCC Bridge pass the wordStand
clear of Casualty Power Cables
rigged. 11. DCC Rep. 5 Power available to
______ 12. Rep. 5 DCC Operating on casualty
power
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Sequence of Command In Un-Rigging Casualty Power
From To Actions 1.
DCC MC Deenergize and unrig casualty
power cable to riser terminal 2.
MC DCC Casualty power deenergized and
unrigged to riser terminal. 3. DCC Rep.
5 Unrig casualty power cable from riser to
terminal___to___(load) 4. Rep.
5 DCC Return all normal sources of power
to______(load)
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Sequence of Command In Un-Rigging Casualty Power
From To Actions 5.
DCC MC Return all normal sources of power
to______(load). 6. Rep. 5 DCC All normal
sources of power available
to_______(load) 7. Rep. 5 DCC All normal
sources of power available to
______(load) 8. Rep. 5 DCC ______(Load)
operating on normal power.
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Summary and Review

• Casualty Power System
• Component Parts
• Terminals
• Cables
• Risers
• Vertical risers
• Application
• How to rig/unrig casualty power