Table 3-2. Barge Normal Electrical Power Distribution
Power generated by the 155kW SSG's,
Power generated by the 20 kW SAG or
shore-based power, or power from
equivalent wattage transmitted
another vessel supports the following'
to the barge supports the following only:
All ROWPU operating systems and both barge
Crew support systems including
and crew support systems such as:
dayroom and workshop equipment,
anchor winches, bridge and bow cranes,
communications, interior lighting,
trolley hoist, ventilating systems, exterior and
navigation lights, emergency battery
interior lighting, communications, navigation
charger, heating and air conditioning,
lights, dayroom and workshop equipment,
chlorination system initial startup,
bilges and sanitation systems.
ventilation, bilge pumps, and toilets
3-6.1 Watertight electrical cabling. Approved watertight electrical cabling and associated hardware is required for use
in receiving or transferring electrical power between the barge and a shore-based facility or another vessel.
3-7 Operating instructions
3-7.1 Operating controls and Indicators
3-7.1.1 General. Figure 3-10 shows an overall view of switchboard. It is divided into four different types of panels:
generator control panels, switchboard distribution panel, paralleling and control panel, and miscellaneous controls and
3-7.1.2 Generator control panels. Three panels (Figure 3-11) across top of switchboard (SSG 1 on left, SSG 2 in
center, and SAG on right, as you face the panel) control generator sets from the switchboard.
VOLTMETER (V). This gauge reads voltage output from generator.
AMMETER (A). This gauge reads amperage output from generator.
FREQUENCY METER (F). This gauge reads generator output frequency.
VOLTMETER SWITCH (VS). This switch selects bus V1-2 on left, OFF in center, and GEN V1-2, V2-3 or V3-1
AMMETER SWITCH (AS). This switch selects A-3 on left, OFF in center top, A-2 in center bottom and A-1 on
GOVERNOR SPEED CONTROL (GS). This toggle switch increases governor speed by moving left for
INCREASE and right for DECREASE. This switch is not connected on the SAG panel since the SAG does not
have a govemor.
VOLTAGE REGULATOR (VR). This two-position switch sets engine to either RUN or IDLE.
AUTOMATIC VOLTAGE CONTROL (VAR) RHEOSTAT. This rotating switch lowers generator output voltage by
turning toward LOWER (left) and raises output voltage by turning toward RAISE (right). On the SAG panel, this
switch is not installed.
ENGINE FAILURE LIGHTS. This grouping shows four warning lights, from left to right: REVERSE POWER,
OVERSPEED, LOW OIL PRESSURE and HIGH WATER TEMPERATURE. Use press-to-test technique for
ENGINE CONTROL SWITCH (ECS). This toggle switch has three positions: START, STOP and REMOTE. ECS
controls the engine start/stop switch (paragraph 3-19.1.1c). In run mode, engine runs at full speed, voltage
regulator operates and generator circuit breaker can be dosed.