Pacific UPC-32 Operation Manual page 56

SECTION 4 OPERATION
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:
TRANSIENT COMMAND SEQUENCE:
Segment 1:
Segment 2:
Segment 3:
The above transient commands are stated for the transient voltage excursion to occur on all phases,
simultaneously.
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:
TRANSIENT COMMAND SEQUENCE:
Segment 1:
Segment 2:
Segment 3:
f = 400 Hz.
o
V , V , V = 124 VAC (High-Line Steady-State)
a b c
WFa=1, WFb=1, WFc=1
XFMR COUPLED, XFMR RATIO=1.5 (or higher)
F=400 Hz. Va=180, Vb=180, Vc=180, T=0.0002
F=400, Va=180, Vb=180, Vc=180, T=0.01
F=400, Va=124, Vb=124, Vc=124, T=0.07
MIL-STD-704D allows for the transient to occur on a single phase or on any
f = 400 Hz.
o
V , V , V = 108 VAC (Low-Line Steady-State)
a b c
WFa=1, WFb=1, WFc=1
DIRECT COUPLED
F=400 Hz. Va=80, Vb=80, Vc=80, T=0.0002
F=400, Va=80, Vb=80, Vc=80, T=0.01
F=400, Va=108, Vb=108, Vc=108, T=0.07
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