MIL-DTL-38195D
TABLE VI. First article tests. 1/
Applicable
Title
Test parameters
paragraph or table
Short circuit test
Perform at rated voltage and frequency
Table II; Table V
Over-speed test
Perform as specified
3.4.2.1; Table V
Frequency and voltage stability test (long
Perform at rated voltage and frequency
3.9.3.3; Table II; Table
term)
V
Voltage unbalance with unbalanced load
Perform at rated voltage and frequency
Table II; Table V
Voltage and frequency regulation test
Perform at rated voltage and frequency
3.9.3.1; Table II; Table
V
Phase balance (voltage) test
Perform at rated voltage and frequency
Table II; Table V
High temperature test (temperature rise)
Perform at rated voltage and frequency and
Table II; Table V
at ambient temperature of 125° F
Overload test (ac generator)
Perform at rated voltage and frequency and
3.5.1.2; Table V
at ambient temperature of 125° F 2/
Perform the following tests at an ambient
DC power unit (transformer-rectifier) test
temperature of 125° F
200 amperes at 28 ± 1 VDC for 2 hours
Table III; Table V
.. Rated load test
300 ± 50 amperes at 28 ± 1 VDC for 5
Table III; Table V
.. Overload test
minutes
Output current shall be self-limiting at 300 ±
Table III; Table V
.. Current limit test
50 Amperes at 28 VDC
Table III; Table V
.. Regulation test
Regulation from no-load to full load and
full load to no-load shall not exceed ± 1.5
VDC
Table III; Table V
.. Ripple voltage test
The output ripple voltage at 200 Amperes at
28 VDC load and VDC shall not exceed 5%.
1/
See 4.3.3.
2/
CAUTION: Exercise care to avoid excessive exhaust temperature on the turbine engine.
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