Lucent Technologies Lineage
®
2000 400A, 60Hz Ferroresonant Rectifier J85503C-3
7 - 2 Troubleshooting and Adjustments
Issue 10 July 2000
Remove
Rectifier
From Service
In general, adjustments should be made to a rectifier while it is removed
from service. If a problem is suspected with a rectifier, find the problem
in Tables 7-A through Table 7-F. Then follow this procedure for
removing the rectifier from service before making the adjustments.
1. Observe and record the rectifier output voltage.
2. Turn the rectifier Power switch Off.
3. Turn the rectifier circuit breaker CB1 off (down).
4. At the ac service panel supplying power to the rectifier, remove
the input fuses assigned to the rectifier or turn the circuit breaker
Off. Use applicable lock-out tag-out procedures.
5. At the plant controller, remove the REG fuse associated with the
rectifier.
6. At the rectifier, loosen the locking screws and open the door.
7. Locate the CM4 interface board.
Caution: The REG fuse associated with the rectifier in the plant
controller must be removed before cable connector J5A is
disconnected or damage to rectifier circuit pack may result.
Support the CM4 interface board with your hands when
disconnecting the cable leads or damage to interface board may
result.
Do NOT disconnect plant control cable connector J5A from
interface board CM4 by pulling the cable.
8. Disconnect J5A from CM4 by unlatching first, then pulling the
cable connector.
9. If the rectifier voltage was NOT at the desired float voltage before
it was turned off, rotate the rectifier Float Adj potentiometer fully
counterclockwise.