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The voltage gradually decays with time to 290 volts by the following equation:
•
•
Stay at 290V for 92.45 seconds before returning to 270V.
Prior to the test, a range change may take place if the power source is set at the low voltage
range. Note: See Section 9.4.6 under HIGH VOLTAGE TRANSIENT.
The ← key (backspace) will terminate the test at any time.
Note: A range change will result in momentary loss of power to the EUT. If this is not
acceptable, the power source must be left in high range at all times.
UNDER VOLTAGE
This test will change the output voltage for the selected phase in the following sequence:
1. 28V system:
0V for 7sec.
•
20V for 93sec.
•
2. 270V system:
•
0V for 7sec.
•
240V for 93sec.
The ← key (backspace) will terminate the test at any time.
9.4.8.4
Emergency Test
From the MIL704 DC MENU scroll to the EMERGENCY DC entry using the up and down cursor
keys (Figure 9-19). Press the ENTER key to start the EMERGENCY TEST.
VOLTAGE
This test will change the output voltage for the selected phase in the following sequence:
1. 28V system:
•
18V for 1 minute.
29V for 1 minute.
•
•
28V for 1 minute.
2. 270V system:
•
250V for 1 minute.
280V for 1 minute.
•
•
270V for 1 minute.
The ← key (backspace) will terminate the test at any time.
V = 289.6 + 3.02/t. for 0.05
Figure 9-19: Emergency Test
≤
≤
t
7.55
160
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