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

The test operator shall monitor the operation of the EUT.  Voltage surges emitted by the EUT

shall be within the limits shown in Figure 8.

5.3.4    Reverse polarity.

Connect the positive (+) terminal of the EUT to the negative (-) terminal of the power supply system.  Connect the negative (-) terminal of the EUT to the positive (+) terminal of the power supply system.  Set the voltage on the power supply to 33 VDC and leave connected for five (5) minutes.  Connect EUT input terminals to power with the correct polarity and verify device operates as specified.  Any deviation from normal operation shall be recognized as a failure of the EUT.

5.3.5    Electromagnetic compatibility.

The EUT shall demonstrate compliance with the applicable performance specification requirements for control of electromagnetic interference and voltage spikes induced by lightning, electromagnetic pulses, and power switching prior to MIL-STD-1275 testing.  Electromagnetic interference testing is not covered by this standard.

5.3.6    Electrostatic discharge.

The EUT shall demonstrate compliance with the applicable performance specification requirements for immunity to electrostatic discharge prior to MIL-STD-1275 testing. Electrostatic discharge testing is not covered by this standard.

6          NOTES

(This section contains information of a general or explanatory nature, which may be helpful, but is not mandatory.)

6.1     Intended use.

The intent of this document is to describe the nominal 28 VDC voltage characteristics, common across military ground vehicles, at the input power terminal of the utilizing electrical and electronic assemblies directly connected to the distribution network.  This lays the groundwork for commonality across vehicle platforms.  The vehicle's design authority is responsible to ensure that the 28 VDC delivered to the input power terminal of the utilization equipment meets these requirements.

6.2     Acronyms.

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