ARMY TM 9-6115-671-14
AIR FORCE TO 35C2-3-446-32
MARINE CORPS TM 09249A/09246A-14
1-15
1.14
DIFFERENCES BETWEEN MODELS.
1.14.1 The differences between generator set models covered in this manual are as follows:
a.
Model MEP-805B is equipped with a 50/60 Hz AC generator and three DCS modules which may
not be used on the MEP-815B (see Table 1-1).
b.
Model MEP-815B is equipped with a 400 Hz AC generator and three DCS modules which may
not be used on the MEP-805B (see Table 1-1).
1.14.2 Performance characteristics for the two models are shown in Table 1-2.
TABLE 1-2. PERFORMANCE CHARACTERISTICS
MEP-805B
MEP-815B
1. Voltage:
a. Voltage wave form deviation factor
5% (max.)
5% (max.)
Singe voltage harmonics
2% (max.)
2% (max.)
b. Voltage unbalance
5% of rated voltage (max.)
5% of rated voltage (max.)
c. Phase balance voltage
1% of rated voltage (max.)
1% of rated voltage (max.)
d. Voltage modulation
1% (max.)
1% (max.)
e. Voltage regulation
1% (max.)
1% (max.)
f.
Short-term stability (30 seconds)
1% of rated voltage
1% of rated voltage
g. Long-term stability (4 hours)
2% of rated voltage
2% of rated voltage
h. Voltage drift (60°F [16°C] in 8-hour
1% (max.)
1% (max.)
period)
i.
Dip and rise for rated load
15% of rated voltage (max.)
12% of rated voltage (max.)
Recovery time
0.5 seconds
0.5 seconds
j.
Dip for low power factor load
30% of no-load voltage
25% of no-load voltage
(max.)
(max.)
Recovery time
0.7 seconds 95% of no-load
0.7 seconds 95% of no-load
voltage
Voltage
k. Adjustment range VAC
50 Hz
400 Hz
120/208V connection
190-213V
195-229V
240/416V connection
380-426V
395-458V
60 Hz
120/208V connection
197-240V
240/416V connection
395-480V
2. Frequency:
a. Regulation
0.25% of rated frequency
0.25% of rated frequency
b. Short-term steady-state stability
0.5% of rated frequency
0.5% of rated frequency
(30 seconds)
c. Long-term steady-state stability
1% of rated frequency
1% of rated frequency
(4 hours)
d. Frequency drift (60°F [16°C] in 8 hour
0.5% (max.)
0.5% (max.)
period)
e. Undershoot with application of load
4% of rated frequency (max.)
1.5% of rated frequency (max.)
Recovery time
2 seconds
1 second
f.
Overshoot with application of load
4% of rated frequency (max.)
1.5% of rated frequency (max.)
Recovery time
2 seconds
1 second
g. Adjustment range
48-52 Hz, not below 45 Hz
390-420 Hz, not below 370
for 50 Hz operation
Hz or above 430 Hz
58-62 Hz, not above 65 Hz
for 60 Hz operation
