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 TM 55-1905-223-24-18-1
switchboard through the bus tie. Upon loss of ship's service power from the main
switchboard, automatic bus transfer equipment within the emergency switchboard
isolates the emergency switchboard and provides for automatic or manual starting of
the emergency generator. Power monitoring of the emergency generator is provided by
for the emergency generator output is also provided. A main switchboard bus tie
circuit breaker and bus tie bypass switch permit distribution of emergency power
(240 Vac) to the main switchboard. The emergency generator circuit breaker is
prevented from being closed by an interlock system when primary power is being
provided through the bus tie. Power distribution is accomplished through circuit
breakers on the switchboard 240 Vac, 120 Vac, and 24 Vdc distribution panels. A
step-down transformer provides 120 Vac back to the switchboard, and a 24 Vdc battery
charger and switchboard batteries provide 24 Vdc back to the switchboard for
distribution.
e. Shore Power Box. The shore power box is located on the 01 level, aft
exterior bulkhead. The two-connection shore power box provides a cable connection
for shore power and another cable connection for providing shore power to another
vessel in tandem.
1-12. Control and Monitoring System. The control and monitoring system provides
for the centralization of control and monitoring functions for the main propulsion
power train, selected pumps, ship's service diesel generators, and vital alarms.
Pilothouse and engine room propulsion control is possible without intervention of
engine room personnel. Primary control is from the pilothouse console with one
soldier at the engine room console. The system permits constant automatic
monitoring of vital machinery operating conditions and initiation of many functions
from the engine room console. The control and monitoring system consists of the
f o l l o w i n g : engine room console, pilothouse console, machinery plant monitoring and
alarm system, engine order telegraph, steering control panel, dual station throttle
control system, bowthruster and auxiliary fire pump control, fire detection, and bow
ramp control.
a. Engine Room Console (ERC). The ERC provides a centralized engine room
l o c a t i o n for: controlling propulsion shafts direction and speed; monitoring
machinery alarm conditions; acknowledging engine orders; alerting engineering
personnel of assistance needed and acknowledging the dead man alarm notification
from the bridge. These functions are provided to the ERC via interfaces with the
machinery plant monitoring system, engine order telegraph, and dual station throttle
control system.
b. Pilothouse Console (PHC). The PHC provides control and monitoring of the
main propulsion power train speed and direction during usual ship operating and
maneuvering conditions without intervention of engine room personnel. The PHC also
provides for: machinery plant monitoring; autopilot operation; steering system
selection and monitoring; bowthruster/auxiliary fire pump engine control;
bowthruster control; communicating desired propulsion shaft direction and speed to
the ERC; operation of blinker lights; operation of bow ramp; operation of ship's
intercommunications system; and activation of ship's general alarm system. These
functions are provided to the PHC via interface with the machinery plant monitoring
system; autopilot; steering control panel, helm (wheel) and rudder angle indicator;
dual station throttle control system, port and starboard main propulsion engine
shaft tachometers; bowthruster engine shaft tachometer; bowthruster control panel;
engine order telegraph; blinker light key; ship's intercommunications panel; and the
general alarm contactor.
1-7
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