Table 16-1. Operating Tests
MIL-STD-705
Test
procedure
Test parameter
1. Regulator and governor stability and
608. la
See tables l-4 and l-5.
transient response. (Short Term)
2. Overspeed protection device.
505.2a
2400 rpm to 2450 rpm.
3. Phase balance.
508.lc
See tables l-4 and l-5.
4. Circuit’ interrupter (short circuit).
512.lc
Instantaneously at 425 + 25 percent
of rated current.
5. Circuit interrupter (overload trip).
512.2c
8 ± 2 minutes at 130 percent
of rated current.
6. Circuit interrupter (undervoltage)
512.3c
Instantaneously below 48 volts. 6 ± 2
(Class 1 sets only).
seconds at 99 ± 4 volts or less.
7. Circuit interrupter (overvoltage).
512.3c
Not more than 1 second after voltage
has risen to and remained at any
value greater than 153 + 3 volts
for not less than 200 milliseconds.
8. Circuit interrupter
514.1
60 Hz = 55 ± 1
(Under Frequency Trip).
50 Hz = 46 ± l
400 Hz = 370 ± 5
9. Low oil pressure protective device.
515. la
Trip pressure 20 ± 2 psi.
10. Reverse power protective device.
Refer to para 16-8.
11. High coolant temperature protective.
515.2a
Trip temperature +222 ± 3° F.
12. Low fuel protective device.
Refer to para 16-9.
13. Regulator range.
511.lc
Test at both 50 Hz and 60 Hz for Mode
I sets. See tables 1-4 and 1-5.
14. Phase sequence (rotation).
507.1c
Ll, L2, L3.
15. Frequency adjustment range.
511.2b
See tables 1-4 and 1-5.
16. Parallel operation provisions.
Refer to para 16-10.
17. Malfunction indicator system.
Refer to para 16-12.
18. Maximum power.
640.lb
125 percent of rated load
CAUTION
Prior to performing any of the operating tests listed in table 16-1, insure that
the generator set is serviced with the correct fuel, oil and coolant as listed on
the data plate.
Change 1 16-3
