TM 55-1930-209-14&P-9-1
2-10.2
Generator control panels Three panels (Figure 2-11) across the top of the switchboard (SSG 1 on left, SSG 2 in
center, and SAG on right) control the generator sets.
a.
VOLTMETER. Reads voltage output from generator. Left gauge in top row of gauges.
b.
AMMETER. Reads amperage output from generator. Center gauge in top row of gauges.
c.
FREQUENCY METER. Reads generator output frequency. Right gauge in top row of gauges.
d.
VOLTMETER SWITCH. Selects bus Vi -2 on left, OFF in center, and GEN VI -2, V2-3, or V3-1 on right. Left
switch in top row of switches.
e.
AMMETER SWITCH. Selects A-3 on left, OFF in center top, A-2 in center bottom, and A-1 on right. Left center
switch in top row of switches.
f.
GOVERNOR SPEED CONTROL. Toggle switch increases governor speed by moving left for INCREASE and
right for DECREASE. Right center switch on top row of switches. Not connected on the SAG panel since the
SAG does not have a governor.
g.
VOLTAGE REGULATOR. Two-position switch sets engine to either RUN or IDLE. Right switch in top row of
switches.
h.
AUTOMATIC VOLTAGE CONTROL RHEOSTAT. Rotating switch controls generator output voltage. Left
switch on bottom row of switches and warning lights. Not installed on the SAG panel.
i.
ENGINE FAILURE LIGHTS. This grouping shows four warning lights, from left to right: REVERSE POWER,
OVER SPEED, LOW OIL PRESSURE, and HIGH WATER TEMPERATURE. Press to test to check lights.
j.
ENGINE CONTROL SWITCH. Toggle switch has three positions: START, STOP, and REMOTE. Controls the
engine START/STOP switch. In run mode, engine runs at full speed, voltage regulator operates, and generator
circuit breaker can be closed. Right switch on bottom row of switches and warning lights.
2-10.3
Switchboard distribution panel. This panel controls two functions: fault detection and power
a.
440 volt ground fault detection. This panel shows three lights labeled: PHASE 1, PHASE 2, and PHASE 3. A
fourth light is a press-to-test check for these three indicator bulbs.
b.
Barge 1 power distribution panel has 13 active and 1 spare circuit breaker (Figure 2-12). Barges 2 and 3
distribution panel has 13 active and 3 spare circuit breakers (Figure 2-13).
2-10.4
Paralleling and control panels. These panels (Figure 2-14) are located in center of switchboard below SSG 2
control panel. They include the following controls and indicators:
a.
VOLTMETER. Reads incoming generator voltage selected with the INCOMING GENERATOR switch. Left
gauge in top row of three gauges.
b.
FREQUENCY METER. Reads generator output frequency selected with INCOMING GENERATOR switch.
Center gauge in row of gauges.
c.
SYNCHROSCOPE. Shows synchronization between the incoming generator selected with INCOMING
GENERATOR switch and the switchboard bus. Right gauge in row of gauges.
d.
INCOMING GENERATOR SWITCH. Switch has four positions: OFF, GEN 1, GEN 2, and GEN 3. Switch
selects which generator is being synchronized with the bus. That generator’s voltage and frequency are shown
on gauges above the switch. Place switch in OFF position when not being used for synchronization.
e.
GENERATOR status lights. These sub panels, just below grab rail on center portion of switchboard, show
status of each generator. RUN light shows generator is running. The next two lights show generator circuit
breaker position as OPEN or CLOSED. The sub panels are labeled GENERATOR 1 on the left, GENERATOR
2 in the center, and GENERATOR 3 on the right.
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