230 VAC at 50, 60 or 400 Hz single phase. The power supply can also operate from a 24 VDC storage battery in the battery standby mode.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12

MIL-PRF-49080D

3.8.8

Rain. The power supply shall operate in its normal operational configuration while

exposed to rain. Failure of the power supply to maintain the required output during testing shall

constitute a failure of this test. Before and after testing as specified in 4.6.10, the power supply shall

meet full specification performance for the following measurements:

Measurement

Reqt Para.

Test Para.

Input and Output Voltage

Ripple Voltage

Electromagnetic interference (EMI). The power supply shall comply with the

3.9

applicable emissions and susceptibility requirements of MIL-STD-461 Table V, Aircraft, Army,

Including Flight Line (see 4.8). Susceptibility tests shall be monitored for conformance with the

ripple voltage requirements of 3.7.4 of this document. RS103 shall be performed from 10 KHz to

400 MHz as follows:

Susceptibility Level

Frequency Range

10 KHz to 1.99 MHz

1 Volt/meter

2.0 MHz to 29.99 MHz

5 Volt/meter

30 MHz to 400 MHz

10 Volt/meter

Air-seal. The power supply shall be capable of maintaining a negative pressure.

3.10

The decrease in vacuum shall not exceed 0.1 pound per minute when tested. The case shall provide

means for enabling performance of the air-seal test (see 4.6.11 and 6.4).

3.11

Reliability. The power supply shall have a 90% probability of providing 500 hours

of failure-free operation under the conditions listed in a) through c) below. When tested in

accordance with 4.10, no chargeable failures shall occur during the duration of the required test

time (see 6.5.2 for chargeable failure definition). Test items shall meet the requirements of 3.7.3

and 3.12.

Ambient temperature of 122�F (50�C).

Duty cycle-intermittent operation.

Environment-ground mobile.

The above requirement shall be verified in accordance with 4.10.