Section III. TECHNICAL PRINCIPLES OF OPERATION

TM 55-1915-200-10

Section III. TECHNICAL PRINCIPLES OF OPERATION

electrical power is provided by an emergency generator

1-10. GENERAL. The following paragraphs provide the

and is distributed through the emergency switchboard to

technical principles of operation of the LSV systems.

allow continued operation of essential systems and

equipment during loss of primary power. In port, the

1-10.1.

Power Generation System.

The power

LSV receives shore power through a cable connected to

generation system provides primary and emergency

the shore terminal box.

electrical power (FIGURE 1-20). Primary power is

provided by two diesel engine driven ship's service

1-10.1.1. Ship's Service Diesel Generator Engine. Two

generators and is routed to the main and emergency

switchboards for distribution to various locations

generator set engines power individual ship's service

(FIGURE 121). The engine room lighting panel L1 (1),

generators, which provide primary electrical power

main engine circulating pump panel (6), main engine

throughout the LSV. One diesel generator is air started;

sump heater panel (14), and the engine room space

the other is electrically started. Engine control is

heater panel (17) are located in the engine room. The

provided from the engine room console.

motor control center (20) is located in the engine control

room. The port main deck lighting panel L-2 (2) is

1-10.1.2. Ship's Service Generator.

located in the port passageway of the main deck. The

starboard main deck lighting panel L-3 (3) is located in

Two 250 kW generators provide 440 volts, 3 phase, 60

the starboard passageway of the main deck. The upper

hertz ship's service power. Each generator is capable of

machinery room power panel P-2 (18) is located in the

providing 110 percent of the necessary sea load for the

upper machinery room. The emergency generator room

propulsion and safety of the ship and preservation of

power panel P-3 (16) and the load center panel (7) are

cargo under normal operation. The generators may be

located in the emergency generator room. The forward

operated in parallel; however, normal operation has one

power panel P-1 (19) and forward lighting panel L-6 (21)

generator on line and the other in reserve.

are located in the port hydraulic machinery room of the

mezzanine deck. The poop deck power panel P-5 (15)

1-10.1.3. Main Switchboard. The main switchboard

is located in the center passageway of the poop deck.

provides generator selection, and power distribution for

The officers deck lighting panel L-4 (4) is located in the

both primary and secondary power. Primary power

center passageway of the officers deck. The galley

consists of 440 Vac supplied by the ship's service

power distribution panels 7A and 7B (13) are located in

generator or from shore facility sources. Secondary

the galley. The pilothouse lighting panel L-5 (5) and the

power is 120 Vac, 60 hertz, supplied from the main

pilothouse emergency panel EP-2 (8) are located on the

switchboard through stepdown transformers.

inboard port bulkhead of the pilothouse. The radio room

panel EP-1 (11), filter panel EP-1 (12), and the

1-10.1.4. Emergency Switchboard. The emergency

electronic emergency panel (10) are located in the radio

switchboard normally receives primary power from the

room. The navigation lights panel (9) is located on the

main

port side of the pilothouse console.

Emergency

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