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This test will change the output frequency in the sequence shown in Table 9-13.
SEQUENCE
The ← key (backspace) will terminate the test at any time.
VOLT UNBALANCE
This test will change the output voltage for the selected phase only in the following sequence:
112V for 1 minute.
•
•
118V for 1 minute.
•
115V for 1 minute.
The test will be repeated on three phase systems to include all three phases if the coupling is set to all.
The ← key (backspace) will terminate the test at any time.
PHASE DIFFERENCE
This test applies to three phase systems only. The phase angle for the selected phase will
change relative to phase A in the following sequence:
If phase B is selected:
236° for 1 minute.
•
244° for 1 minute.
•
240° for 1 minute.
•
If phase C is selected:
•
116° for 1 minute.
•
124° for 1 minute.
120° for 1 minute
•
VOLTAGE MODULATION
This test will vary the output voltage by ±2.5V rms over a period of one second. The test will last
for 2 minutes. The ← key (backspace) will terminate the test at any time.
FREQUENCY MODULATION
REVISION
M ODULA TION
This test will vary the output frequency as defined by Table 9-14 over a period of one minute.
The test will last for 4 minutes. The ← key (backspace) will terminate the test at any time.
WAVEFORM DISTORTION
FREQUENCY
400Hz
VFREQ
1
393
2
407
3
400
Table 9-13: Steady state frequency
D
±7Hz
Table 9-14: Frequency Modulation
60 Hz
360
59
800
61
SSF
60
E
F (400Hz /VFREQ)
±4Hz
TIME
1 minute
1 minute
1 minute
F (60HZ)
±4Hz
±0.5Hz
152
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