AS1f0303
AS1f0304
Figure 1-5.--MMG-1A mobile electric power plant.
Figure 1-6.--A/S37A-3 shipboard mobile electric power plant.
It is not self-propelled and must be towed or manually
moved. It provides 115/200-volt, 3-phase, 400-Hz, 90
to test the output power characteristics of 28-volt dc and
kVA ac power, and 28-volt dc power at 750 amperes
115/200-volt ac, 3-phase, four-wire, 400-Hz mobile
continuous, 1,000 amperes intermittently. This unit is
electric power plants or motor generator sets. This unit
used primarily at shore stations.
is used both aboard ship and at shore stations.
Q1-33.
The NC-8A/A-1 is powered by a 4-cylinder,
MMG-1A Mobile Electric Power Plant
two-stroke-cycle Detroit Diesel engine.
The MMG-1A (fig. 1-5) is a small, compact,
1. True
trailer-mounted, electric motor-driven generator set. It
2. False
is not self-propelled and must be towed or manually
Q1-34.
Which of the following mobile electric power
moved. It is powered by a 3-phase, 60-Hz, 220- or
plants has a 90 kVA generator?
440-volt ac external power source. It provides
115/200-volt, 3-phase, 400-Hz, 60 kVA ac power, and
1.
NC-8A/A1
28-volt dc power at 500 amperes continuous, 1,000
2.
NC-10C
amperes intermittently. This unit is used both aboard
3.
MMG-1A
ship and at shore stations.
4.
A/S37A-3
Q1-35.
Which of the following mobile electric power
A/S37A-3 Shipboard Mobile Electric Power Plant
plants are used aboard ship?
The A/S37A-3 (fig. 1-6) is a four-wheel,
1.
MMG-1A and A/S37A-3
self-propelled, rear-wheel-drive vehicle powered by a
2.
NC-8A/A1 and NC-10C
3-53 series, two-cycle Detroit Diesel engine. The
3.
MMG-1A and NC-10C
engine drives the electric generator and the hydraulic
4.
NC-10C and DA-675/MSM
propulsion system. The generator provides
115/200-volt, 3-phase, 400-Hz, 45 kVA ac power, and
28-volt dc power at 1,000 amperes. This unit is used
primarily aboard ship.
Dummy Load Electric, DA-675/MSM
The dummy load electric unit, DA-675/MSM,
often referred to as a load bank (fig. 1-7), is a
AS1f0305
four-wheel, trailer-mounted, electrical dummy load. It
is not self-propelled and must be towed or manually
moved. It is used at intermediate maintenance facilities
Figure 1-7.--DA-675/MSM dummy load electric unit.
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