Pacific Power Source LMX Series, Руководство по эксплуатации

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LMX SERIES™ OPERATION MANUAL
SECTION 6:
Front Panel Operation
Entire Contents Copyright
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2018 by Pacific Power Source, Inc. (PPS) • All Rights Reserved • No reproduction without written authorization from PPS.
LMX Series Power Source Operation Manual Page 123 of 463
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 6-9: 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 6-10: 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 6-10: Voltage Transient List for Example 1