MIL-STD-1275 Characteristics Of 28 Volt Dc Input Power To Utilization Equipment In Military VehiclesThis standard defines the operating voltage limits and transient voltage characteristics of the 28 VDC electrical power at the input power terminals to the utilization equipment connected to the electrical power distribution system on military ground vehicle platforms.

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MIL-STD-1275E

300

250

200

250V, 70µs

Utilization equipment may be damaged in this voltage range

100V, 1 ms

150

100

50

Volts

0

-50

-100

-150

18V, 1 ms

-200

-250

·250V, 70µs

Utilization equipment may be damaged in this voltage range

-300

0                 100               200               300               400               500               600               700               800               900              1000

Time (µs)

Figure 7.  Envelope of spikes for 28VDC systems.

5.1.3.2.2   Emitted voltage surges.

Emitted voltage surges from utilization equipment shall be within the limits shown in Figure 8.

5.2     Voltage compatibility verification setup.

5.2.1    Environmental conditions.

Testing of the EUT according to this standard shall be performed under the following environmental conditions:

Temperature:                           +23°C ± 5°C (+73°F ± 9°F) Relative Humidity:                 0% to 90% humidity

Atmospheric Pressure:            80kPa to 102kPa (23.62 inHg to 30.12 inHg)

Testing under different environmental conditions (e.g., extremes of operating temperature) shall be conducted at the discretion of the appropriate authority.

The electromagnetic environment (e.g., background noise) shall not interfere with the measurement instrumentation setup.

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