Lucent Technologies Lineage
®
2000 200A Ferroresonant Rectifier J85503B-2
7 - 12 Troubleshooting and Adjustments
Issue 8 January 1999
Adjustments
This section includes procedures to check fuses (Clear RFA and
FA), calibrate the meter, adjust the current limit, and set the
internal selective high voltage shutdown (ISHVSD) for rectifiers
without controllers. It may be necessary to remove the rectifier
from service before completing these procedures.
Clear Rectifier
Failure Alarm
(RFA)
A fuse alarm (FA) may be present with the RFA alarm.
1. Observe and record the status of the fuses in the plant
controller. If the controller has an efficiency algorithm,
disable this feature.
2. Turn the rectifier Power switch Off.
3. If any of the following fuses are blown, remove the
rectifier from service and replace fuse(s) with one of the
same type and capacity.
– Alarm fuses F1, F2, and F3 on CM1
– Output filter capacitor fuses F1, F2, F3, F4, F5.
4. Restore the rectifier to service.
5. 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.
The rectifier voltage may be too high.
1. Observe and record the rectifier output voltage, Rect V,
and plant float voltage, Plt V. The rectifier voltage is
normally greater than the plant voltage by an amount equal
to the lead drop between rectifier and batteries, less than 2
volts. Adjusting the plant voltage makes a corresponding
adjustment in the rectifier voltage.
2. If the rectifier output voltage is greater than the plant
float voltage by more than the expected lead drop, then use
the following procedures:
a. Holding the meter selector switch in the Plt V position,
turn the Float Adj potentiometer counterclockwise to
lower the output voltage to the correct value.
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