3-13.5 Shutdown procedures
3-13.5.1 Normal shutdown procedures. When all electrical power is to be terminated and emergency system is not
needed, shutdown as follows:
On DC panel, open (ON) circuit breakers 1P14 thru 8P14 and fused circuit 9P14 (Figure 3-18).
On emergency lighting panel, verify that circuit breakers 10P13A-1 thru 10P13A-8 (Figure 3-19) are open (OFF).
On inverter, turn ON/OFF switch to OFF.
On battery charger, turn to OFF (Figure 3-20).
On power panel 3 (120 Vac) open (OFF) circuit breaker 10P13 (Figure 3-5).
Fumes from battery electrolyte may be flammable and explosive. Do NOT smoke
or have open flames when checking electrolyte or working on batteries.
Check batteries in battery bank and make sure electrolyte is above plates in each cell of each battery.
Clean all major components of system. See TM 55-1930-209-14 & P-9, Electrical Power Systems.
3-13.5.2 Emergency shutdown procedures. Operating either system shutdown or total shutdown buttons does not
affect the emergency power system.
Section V. 155 kW ship service generators,
3-14 Description. Two diesel powered generator sets, each rated at 155 kW, serve as primary electrical power sources
for the barge. When shore power is not used, one SSG must be online when any of the ROWPU major systems are
being operated. These SSG's, number 1 in void 4 port and number 2 in void 4 starboard, are Caterpillar diesel engine
driven generator sets. Each SSG consists of a Caterpillar 3306TA diesel engine and a Caterpillar Model SR4 generator
mounted, with isolation isolators, on a common base. The set weighs 3960 pounds dry and 4180 pounds wet and is 118
inches long, 39 inches wide, and 59 inches high. The third generator set, rated at 20 kW, supplies power for the barge
when ROWPU major systems are not operating and there is a lower demand for electrical power. Information on the SAG
is in Section VI. Generator set installation and electrical hookups are shown on drawings listed in
TM 55-1930-209-14 & P-9.
3-14.1 3306TA diesel engine. This engine is a 6-cylinder inline, 638-cubic inch displacement, four-stroke cycle diesel.
Turbo charged and after cooled, it provides its maximum output at 1800 rpm. It has a 24 Vdc electric starter and battery
bank. A battery charger mounted in the switchboard keeps the SSG batteries charged. A heat exchanger provides
seawater cooling for both engine coolant and engine lubricating oil. Instrumentation includes an engine service meter
calibrated in hours and protective cutoffs that activate in the event engine coolant temperature or oil pressure exceed
maximum allowable limits.
3-14.2 SR4 generator. This generator has a revolving field and is statistically regulated with a rotating brushless exciter.
It has no brushes or commutator and uses a solid-state automatic voltage regulator. For a more detailed technical
description, refer to manufacturers' manuals listed in Section VI of TM 55-1930-209-14&P-9.
3-15 Capabilities. Either SSG is capable of providing all electrical power for barge operations. For load transfer
purposes only, SSG's can be operated in parallel with each other or either one can be operated in parallel with the
auxiliary generator. When properly operated and maintained, these SSG's are rated for "prime power-continuous
operation." With full barge fuel tanks, the SSG's can operate nonstop for 7 days. The supply of other consumables used
by the electrical power system, such as lubricating oil, will last 30 days.