User manual

User Manual – Rev B FCS Series II
FREQUENCY TRANSIENTS (Group 1 and A(CF) only)
Seq. No Frequency Time
1 400 5 Minute
2 440 150msec
3 420 1.5sec
4 400 5Sec.
5 350 150msec
6 380 1.5sec
7 400 5Sec.
Table 8-6: Normal Frequency Transient Sequence
put voltage is set to Vnom (115 V) while the
8-6. The test will cycle 5 times starting
FREQUENCY VARIATION
This test applies to Group1 and A(CF) only. The out
frequency is changed per the sequence listed in Table
from sequence 2. Steps 3 and 6 apply to A(CF) only.
(Group2 / A(NF) and Group3 / A(WF) only)
Seq. No Initial Frequency Slew rate Final Frequency
Group2 Group3 Hz/Sec Group2 Group3
1 100 650 800 360 360
2 650 800 100 or 200 360 360
3 360 Pause 5 sec 360 360 360
Table 8-7: Normal Frequency Variation Sequence
This test will apply to Group2/A(NF) and Group3/A(WF) only. . The output voltage is set to
Vnom (115 V) while the frequency is set to 360Hz for 5 minutes. The frequency is slowed per
the sequence listed in Table 8-7. The test will cycle 3 times. The frequency will return to
nominal after the test is completed. Slew rates of 200Hz apply to RTCA2 only.
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