Exciter Field Voltage and Current Versus Load
Frequency
Percent of Rated Load
0
25
50
75
100
125
Exciter
Exciter
Exciter
Exciter
Exciter
Exciter
volts Amps
Volts Amps
volts
Amps
volts Amps
volts Amps
Volts Amps
50 HZ ,23 2.35
10.3
2.95
12.4
3.55
14.5
4.15
16.6
4.75
19.3
5.5
60 HZ 4.2
1.35
5.74
1.85
7.3
2.35
8.84
2.85
10.4
3.35
11.94
3.85
d. Main Generator. (400 Hz) Exciter field
voltage and current versus load. see the following:
Exciter Field Voltage and Current Versus Load
Frequency
Percent of Rated Load
0
25
50
75
100
125
Exciter
Exciter
Exciter
Exciter
Exciter
Exciter
Volts Amps
volts Amps
Volts Amps
Volts Amps
Volts Amps
Volts Amps
400 HZ 11.1 3.35
12.2
3.70
13.04
3.95
14.2
4.30
15.3
4.65
13.3
4.95
e.
Engine.
Refer to Operator and Organizational
Maintenance Manual.
f. Excitation Assembly.
DOD drawing No. 70-1367 . . . . . . . . 50/60 Hz
DOD drawing No. 70-1368 . . . . . . . .400 Hz,
Type . . . . . . . . . . . . . solid state, with capability
to automatically flash field of
generator.
Voltage regulation:
Precise sets. . . . . . . 1 percent of rated voltage.
Utility sets. . . . . . . . 3 percent of rated voltage.
Voltage stability:
Short term (30 seconds)
Precise sets. . . . . . within bandwidth equal to 1
percent of rated voltage,
Utility sets. . . . . . . . within bandwidth equal to 2
percent of rated voltage.
Long term (4 hours)
Precise sets. . . . . . within bandwidth equal to 2
percent of rated voltage.
Utility sets. . . . . . . within bandwidth equal to 4
percent of rated voltage.
Voltage Drift (8 hours). . ..1 percent with a change
ambient temperature up to 60° F
(33. 3°C).
Transient performance (application or rejection of
rated load).
Resumption of steady state condition:
Precise sets. . . . . . . within 0.5 second.
Utility sets. . . . . . . . within 3 seconds.
Overshoot and Undershoot:
Precise sets (50/60 Hz). . . .15 percent of rated
voltage,
Precise sets (400 Hz). . . . . .12 percent of rated
voltage.
Utility sets. . . . . . . . . . . . . . .20 percent of rated
voltage.
g. Engine Accessories.
(1) Fuel injection pump.
Manufacturer. . . . . . . Roosa Master
Model. . . . . . . . . . . . . . DCMFC 629-2LQ
Type. . . . . . . . . . . . . . . Fuel metering distributor,
twin cylinders
Drive type. . . . . . . . . . gear
Governor type. . . . . . . flyweight (centrifugal)
Rotation . . . . . . . . . . . . Clockwise (viewed from driven
end),
Cylinders (output) . . .6
Mounting, . . . . . . . . . . . Flange
Plunger diameter. . .
0.290 inches
Operational Data
Line pressure (maximum permissible) 8000 psi
Maximum permissible transister pump pressure
130 psi
Transfer pump lift at 200 pump rpm (minimum)
18 in. high
Pump speed (maximum permissible)
3000 rpm
(2) Fuel transfer pumps. Refer to Operator and
Organizational Maintenance Manual.
(3) Governor hydraulic actuator.
DOD drawing no. . . . . . .
Position transducer. . . .
Input pressure. . . . . . . . .
Type . . . . . . . . . . . . . . . . . .
Gem . . . . . . . . . . . . . . . . . .
69-790-2.
variable reluctance type.
320 psi.
differential pressure
operated.
2.
(4) Hydraulic pump.
Manufacturer. . . . . . . . . . . John S. Barnes.
Manufacturer’s model no. . . . GC-5183-A-DA.
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