Components installed as part of the normal electrical power system are listed on the parts list in drawings listed in
Appendix A and in the Components of End Item List in TM 55-1930-209-14&P-20.
Common and bulk items onboard are listed in the Expendable Supplies and Materials List in TM 55- 1930-209-1
Repair parts and special tools onboard are listed in the Repair Parts and Special Tools List in TM 55- 1930-209-
Items required but not furnished. All required items are furnished.
Tools and test equipment. Use existing tools and equipment. A complete list of tools and test equipment onboard
is in the Tools and Test Equipment List in TM 55-1930-209-14&P-8.
SECTION II. Description of operation
Description of operation. Normal electrical power is generated onboard by one of three diesel-powered generator
sets. Two of these are rated at 155 kW, designated as the SSG1 and SSG2 sets, and one is rated at 20 kW and designated
as the SAG set. Except for a few minutes when transferring power loads from one generator to another, only one of these
three generators is providing power (termed online") at any moment. These generator sets are normally operated and
controlled from the master switchboard in the ROWPU space. For maintenance and servicing, they can be locally operated
and controlled at the generator set location.
Either 155 kW SSG set supplies electrical power to the switchboard power distribution center. Power flow is then
distributed from the switchboard directly to ROWPU operating equipment and to subordinate distribution panels for the
auxiliary systems used in barge support. Electrical power generated by the 20 kW SAG set also flows through the
switchboard power distribution center, but power from the SAG is distributed only to crew support auxiliary systems such as
communications, day room equipment, workshop equipment, and interior lighting. When electrical power is supplied from
either a shore-based facility or from another vessel, the power is received through the shore power receptacle located on the
aft weather deck port side. From there it flows to the switchboard distribution center. Table 2-2 lists power distribution from
normal electrical power supply sources.
Table 2-2. Barge Normal Electrical Power Distribution
Power generated by the 155 kW SSGs,
Power generated by the 20 kW SAG or
shore-based power, or power from another
equivalent wattage transmitted to the barge
vessel supports the following:
supports the following only:
All ROWPU operating systems and both
Crew support systems including dayroon and
barge and crew support systems such as:
workshop equipment, communications, interior
anchor winches, bridge and bow cranes,
lighting, navigation lights, emergency battery
trolley hoist, ventilating systems, exterior
charger, heating and air conditioning,
and interior lighting, communications, navigation
chlorination system initial startup, ventilation,
lights, day room and workshop equipment,
bilge pumps, and toilets.
bilges, and sanitation systems.
SECTION III. Operating Instructions
Operating controls and Indicators
General. Figure 2-10 shows an overall view of the switchboard. lt is divided into four different types of panels:
generator control panels, switchboard distribution panel, paralleling and control panel, and miscellaneous controls and