Lucent Technologies Lineage
®
2000 400A, 60Hz Ferroresonant Rectifier J85503C-3
8 - 8 Spare Parts and Replacement Procedures
Issue 10 July 2000
CM3 Digital Meter
Board
Minimize electrostatic discharge when handling circuit modules.
Observe all warnings in Section 4.
1. Turn the rectifier Power switch Off.
2. Turn the rectifier CB1 circuit breaker off (down).
3. At the ac service panel supplying power to the rectifier, remove
the input fuses assigned to the rectifier, or turn the circuit breaker
Off.
4. At the plant controller, remove the fuse REG fuse associated with
the rectifier.
5. At the rectifier, loosen the locking screws and open the door.
6. Disconnect control cable connector J5A from the CM4 board by
unlatching first, then pulling the connector.
7. Disconnect the connecting cables from CM3.
8. Remove CM3 from the two support standoffs by using a small
flat-bladed screwdriver to push in the latches on each standoff.
Remove the one screw holding CM3 in place.
9. Position the new CM3 board over the two standoffs. Replace the
screw. Verify that each latch snaps and locks in place.
10. Reconnect connecting cables to CM3.
11. Check calibration of rectifier meter per Section 7, “Calibrate CM3
Digital Meter.”
12. If the rectifier is to be restored to service, refer to Section 7,
“Restore Rectifier to Service.”