SECTION 4
OPERATION
44
4.4.2.1 MIL-STD-704D TRANSIENT PROGRAMS (cont)
OVER-VOLTAGE TRANSIENT (Program #100)
The power source will produce the over-voltage transient excursion as defined by MIL-STD-704D
(Paragraph 5.2.3.2.1). The power source
must
be configured for a voltage range of at least 180Vrms to
perform this test.
INITIAL CONDITIONS:
f
o
= 400 Hz.
V
a
, V
b
, V
c
= 124 VAC
(High-Line Steady-State)
WFa=1, WFb=1, WFc=1
XFMR COUPLED, XFMR RATIO=1.5 (or higher)
TRANSIENT COMMAND SEQUENCE:
Segment 1:
F=400 Hz. Va=180, Vb=180, Vc=180, T=0.0002
Segment 2:
F=400, Va=180, Vb=180, Vc=180, T=0.01
Segment 3:
F=400, Va=124, Vb=124, Vc=124, T=0.07
The above transient commands are stated for the transient voltage excursion to occur on all phases,
simultaneously. MIL-STD-704D allows for the transient to occur on a single phase or on any
combination of phases. To exclude a phase from the transient excursion, simply change the appropriate
Va, Vb or Vc field in Segment 1 and 2 to remain the same as the steady-state voltage.
UNDER-VOLTAGE TRANSIENT (Program #101)
The power source will produce the under-voltage transient excursion as defined by MIL-STD-704D
(Paragraph 5.2.3.2.1). The power source
must
be configured for a voltage range of at least 108Vrms to
perform this test.
INITIAL CONDITIONS:
f
o
= 400 Hz.
V
a
, V
b
, V
c
= 108 VAC
(Low-Line Steady-State)
WFa=1, WFb=1, WFc=1
DIRECT COUPLED
TRANSIENT COMMAND SEQUENCE:
Segment 1:
F=400 Hz. Va=80, Vb=80, Vc=80, T=0.0002
Segment 2:
F=400, Va=80, Vb=80, Vc=80, T=0.01
Segment 3:
F=400, Va=108, Vb=108, Vc=108, T=0.07
Summary of Contents for UPC-12
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Page 17: ...SECTION 1 GENERAL 5 PACIFIC Figure 1 3a SCU UPC 32 Figure 1 3b UPC 32 Figure 1 3c UPC 12 ...
Page 46: ...SECTION 4 OPERATION 34 PA CIFIC FIGURE 4 1 POWER SOURCE FRONT PANEL ...
Page 77: ...SECTION 4 OPERATION 65 90 0 100 0 85 95 100 90 FIGURE 4 6 2 1 EDITED WAVEFORM ...
Page 139: ...NOTES 127 NOTES ...
