3-7.2 Prestart procedures from switchboard
This chapter provides procedures when operating generator sets from the
switchboard. Section V and Section VI provide procedures for local operation of
generator sets at engine locations in void 4.
Perform prestart procedures in paragraph 3-19.3 for SSG 1 or SSG 2 or paragraph 3-25.2 for SAG.
Check that circuit breaker for starting generator (Figure 3-14) (P1, P2 or P3) is (OFF).
Check that shore power circuit breaker P4 (Figure 3-15) is (OFF).
Check that INCOMING GENERATOR selector switch (Figure 3-14) is (OFF).
Check that generator VOLTAGE REGULATOR switch is on IDLE (Figure 3-11).
Check that ENGINE CONTROL SWITCH is STOP (Figure 3-11).
Check that battery charger for starting generator is set on FLOAT (Figure 3-15).
Make sure EMS is operating by pushing up on monitor controller left of equipment monitoring processor. If video
screen does not come on, turn it on with switch beneath the screen. For more details on EMS, see TM 55-1930-
209-14 & P-11.
Check that 24 Vdc power panel in workshop is active (Figure 3-18) and circuit breaker 8P14 is closed (ON) This
procedure provides voltage to hold open solenoids in generator fuel lines. Emergency shutdown switches
activate these shutoff solenoids by removing this 24 Vdc power. If 24 Vdc panel is not active and circuit breaker
8P1 4 is not dosed, these holding solenoids are dosed and fuel for these generators is shut off. The generator
will start and run for about 2 minutes, and then fuel starvation will shut off engine.
If all power panel users are not turned off when all power sources on the barge are
turned off, DC battery pack will be drained of power. Without DC power to hold the
fuel cutoff solenoids open, generators will not operate to recharge the 24 Vdc
3-7.3 Generator set alarm and shutoff systems. The SSG's and SAG have built-in alarm and shutoff systems. Alarms
and emergency shutoff systems, discussed in this section, function whether SSG's are operated at the engine or at the
3-7.3.1 Alarm systems. Three alarm switches are set at levels of coolant temperature, oil pressure, and rpm less critical
than the emergency shutoff controls described in paragraph 3-7.3.2. When alarm conditions exist, three red lights in a
row of four ENGINE FAILURE lights (Figure 3-11) on affected generator set switchboard panel light up. When EMS is on
(TM 55-1930-209-14&P-11), these critical conditions are also made known to the crew by a blinking display on the EMS
video monitor on the forward ROWPU bulkhead, by a strobe light and horn in the ROWPU space, a horn on the
deckhouse top, and a buzzer in the dayroom. Alarms warn operators that an unsafe condition is developing and
corrective action must be taken immediately. If action is not taken, an emergency shutoff solenoid will shut down the
SSG. Alarms continue until turned off or until the unsafe condition is corrected. When the unsafe condition is corrected,
switches automatically reset. The fourth alarm condition, reverse power, is discussed in paragraph 3-7.5