Lucent Technologies Lineage
®
2000 400A, 60Hz Ferroresonant Rectifier J85503C-3
Issue 10 July 2000
Troubleshooting and Adjustments 7 - 13
3. If the rectifier output voltage is less than the plant voltage and/or
all rectifiers shut down, then use the following procedures.
a. If the CM2 board has not been replaced, then replace it at this
time.
b. If the rectifier started, minor alarm retired on controller, and the
rectifier RFA light extinguished, then the RFA problem has
been cleared. Otherwise, continue with the following
procedures.
If replacing the CM2 board does not clear the problem, then the outputs
from T1 and T2 are probably unbalanced. Try the following:
1. Check the wiring to the thyristors. (See Figure 8-1.)
2. Check for defective thyristors. Replace, if defective.
Verify that the controller's high voltage shutdown circuit is operating
properly. (See your controller manual.)
Clear Fuse Alarm
(FA)
1. If the circuit breaker (CB1) is tripped, restore the rectifier to
service and check power output fuse F7.
2. If CB1 did not trip, check alarm fuses F1,F2, and F3 on CM1.
These fuses are accessible by opening the door of the rectifier.
CM1 is near the output filter capacitors. Also check output fuse
alarm switch SW1 on F7 for open fuse (raised) indicator.
3. If the F2 or F3 alarm fuse is blown, check for possible trouble and
replace the fuse.
4. If the F1, F2, G3, F4. F5 or F6 capacitor fuse or F1 alarm fuse on
CM1 is blown, check for a shorted output capacitor. Remove the
rectifier from service to replace any shorted capacitor and/or
blown fuse.
Calibrate CM3
Digital Meter
Calibration is not feasible unless the test meter has an accuracy of ± 0.02
percent or better. Table 7-G provides digital meter tolerances.
