AFX SERIES® OPERATION MANUAL
SECTION 6:
Entire Contents Copyright
2018 by Pacific Power Source, Inc. (PPS)
• All Rights Reserved • No reproduction without written authorization from PPS.
AFX Series Power Source Operation Manual
Page 124 of 402
Voltage and Frequency Transient Example 1
This example is based on an actual avionics test requirement from RTCA/DO160 Section 16
test number 16.5.2.1d. This is a single-phase abnormal voltage and frequency limit test for
airborne equipment operated from 400Hz AC power.
The requirement from the test standard is shown in the table below:
TEST
VOLTAGE (V rms)
FREQUENCY (Hz)
1
122
430
2
100
430
3
122
370
4
100
370
Table 6-10: RTCA/DO160 Section 16 test number 16.5.2.1d
There are four tests, each runs for at least 5 minutes or 300 seconds. Each test step has a
different voltage and frequency deviation from the nominal 115V and 400Hz. This is
graphically illustrated by the image below.
Time
à
120.0
110.0
100.0
90.0
0.0
115Vac
Volt AC
Step #1
Step #3
Step #4
Step #5
Step #2
Freq
400Hz
Figure 6-12: RTCA/DO160 Section 16 test number 16.5.2.1d
To generate this DO160 test sequence, the following transient list entries are required.
Times shown in milliseconds.
#
Ramp
Freq
Volt
Dwell
1
0.2
430
122.00
300000
2
0.2
370
100.00
300000
3
0.2
430
122.00
300000
4
0.2
370
100.00
300000
5
1000
400
115.00
300000
Table 6-11: Voltage Transient List for Example 1