TM 55-1930-209-14&P-1
3-16 Special limitations.
3-16.1 The SSG's consume fuel at about 12.7 gph at 100 percent of power at 1800 rpm and as low as 4.2 gph at 25
percent of power at the same rpm.
3-16.2 SSG's will not operate in parallel with an external power source.
3-16.3 SSG's are designed to operate at ambient temperatures of -22 to 122°F.
3-17 Performance characteristics. The voltage level can be adjusted within ±5 percent of rated voltage Voltage droop is
adjustable for proper division of reactive kVA when operating in parallel with other generators Voltage gain is adjustable to
compensate for engine speed variation when operating with a speed droop governor. Full load rpm is 1800, low idle is
1200 rpm. Electrical output characteristics at an 0.8 power factor are listed.
kW
155
kVA
193 75
Voltage
440 Vac
Current
255 amps
Phase
3
Hertz
60
3-18 Description of operation. Normal electrical power for barge operations is supplied by one of the two SSG's. By
transferring loads between generator sets, barge operations can continue without interruption. While any two of the three
generators onboard can be operated In parallel, this procedure is for load transfer only and not for continuous operation.
To transfer the electrical load from one generator to another, start the unused generator. After warmup, parallel its load
with the current loaded generator and transfer the load (paragraph 2-14, Vol. 9) Run down, cool off, and shut down the
now unused generator. This paralleling and transferring of electrical load can be done between the 20 kW auxiliary
generator and either of the two SSG's or between SSG's.
3-18.1 Remote control and startup requirements. While the three generator sets are located in voids 4, they are
normally operated from the switchboard in the ROWPU space. Normally, one of the first actions upon entering the barge
is to start the auxiliary (20 kW) generator to provide power for barge housekeeping activities This generator does not
provide sufficient power to support operation of major ROWPU components, however, so prior to starting a major
ROWPU component, one of the SSG's must be brought online. Start an SSG, parallel it with the SAG, and transfer the
load to the SSG. Then shut down the SAG
3-19 Operating controls and indicators.
3-19.1 3306TA diesel engine
3-19.1.1 Controls for operating engine at the SSG
a.
ENGINE CONTROL switch. This switch on SSG switchboard panel has START, REMOTE, and OFF/RESET
positions. To start engine from switchboard, move ECS to START and engine will automatically crank and run.
To start engine at the engine, move ECS on switchboard to REMOTE and use engine START/STOP switch on
the engine. To stop engine from switchboard, move ECS to OFF/RESET.
b.
VOLTAGE REGULATOR switch. Located on switchboard. IDLE position allows engine to run at low speed for
warmup and maintenance checks. RUN position allows engine to run at full speed of 1800 rpm While set on
IDLE, generator's circuit breaker connecting its power to the switchboard bus will not close.
3-37
