ARMY TM 9-6115-643-24
AIR FORCE TO 35C2-3-445-22
1.10 DIFFERENCES BETWEEN MODELS.
1.10.1
The differences between models of the generator sets covered in this manual areas follows:
a. Model MEP-804A is equipped with a 50/60 Hz generator, 50/60 Hz frequency meter, and frequency selector switch.
b. Model MEP-814A is equipped with a 400 Hz generator and 400 Hz frequency meter.
1.10.2
Performance characteristics for the two models are shown in TABLE 1-2.
TABLE 1-2. Performance Characteristics
1. Voltage:
(a) Voltage waveform
deviation factor:
Single voltage
harmonics:
(b) Voltage unbalance
(c) Phase balance voltage
(d) Voltage modulation
(e) Voltage regulation
(f) Short-term stability
(30 seconds)
(g) Long-term stability
(4 hours)
(h) Voltage drift (60°F
(16°C) in 8-hour
period)
(i) Dip and rise for
rated load
Recovery time
(j) Dip for low power factor
load
Recovery time
(k) Adjustment range VAC
120/208V connection
240/416V connection
120/208V connection
240/416V connection
MEP-804A
5% (max)
2% (max)
5% of rated
voltage (max)
1% of rated
voltage (max)
2% (max)
1% (max)
1% of rated voltage
2% of rated voltage
±1% (max)
15% of rated
voltage (max)
0.5 seconds
30% of no-load
voltage (max)
0.7 seconds
95% of no-load
voltage
50 Hz
190-213V
380-426V
60 Hz
197-240V
395-480V
MEP-814A
5% (max)
2% (max)
5% of rated
voltage (max)
1% of rated
voltage (max)
2% (max)
1% (max)
1% of rated voltage
2% of rated voltage
±1% (max)
12% of rated
voltage (max)
0.5 seconds
25% of no-load voltage
(max)
0.7 seconds 95% of no-load
voltage
400 Hz
197-229V
395-458V
1-8