Pacific Power Source UPC-32 - Page 49

SECTION 4 OPERATION
39
4.4.2.1 MIL-STD-704D TRANSIENT PROGRAMS (continued)
OVER-FREQUENCY TRANSIENT (Program #102)
The power source will produce the over-frequency 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 115Vrms to
perform this test.
INITIAL CONDITIONS:
f
o:
407 Hz. (High Frequency Steady-State)
V
a
, V
b
, V
c:
115 VAC (Nominal Steady-State)
WFa, WFb, WFc: 1
DIRECT COUPLED
TRANSIENT COMMAND SEQUENCE:
Segment 1: F=425 Hz. Va=115, Vb=115, Vc=115, T=0.0002
Segment 2: F=425, Va=115, Vb=115, Vc=115, T=1
Segment 3: F=420, Va=115, Vb=115, Vc=115, T=0.0002
Segment 4: F=420, Va=115, Vb=115, Vc=115, T=4
Segment 5: F=410, Va=115, Vb=115, Vc=115, T=0.0002
Segment 6: F=410, Va=115, Vb=115, Vc=115, T=5
UNDER-FREQUENCY TRANSIENT (Program #103)
The power source will produce the under-frequency 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 115Vrms to
perform this test.
INITIAL CONDITIONS:
f
o:
393 Hz. (Low Frequency Steady-State)
V
a
, V
b
, V
c:
115 VAC (Nominal Steady-State)
WFa, WFb, WFc: 1
DIRECT COUPLED
TRANSIENT COMMAND SEQUENCE:
Segment 1: F=375 Hz. Va=115, Vb=115, Vc=115, T=0.0002
Segment 2: F=375, Va=115, Vb=115, Vc=115, T=1
Segment 3: F=380, Va=115, Vb=115, Vc=115, T=0.0002
Segment 4: F=380, Va=115, Vb=115, Vc=115, T=4
Segment 5: F=390, Va=115, Vb=115, Vc=115, T=0.0002
Segment 6: F=390, Va=115, Vb=115, Vc=115, T=5