Lucent Technologies Lineage
®
2000 50A Ferroresonant Rectifier J85502B-1
Issue 6 May 1999
Spare Parts and Replacement Procedures 8 - 17
DC Filter
Capacitors (C1,
C2, or C3)
1. Move the output terminal block TB3 aside by removing
the two mounting nuts, but do not remove the leads.
2. Remove the CM1 option board (see “Replacing CM1
Option Board”).
3. Remove the CBA1 bracket assembly per Section 5.7.2.
4. Remove the diode heat sink assembly (See “Diode Heat
Sink Assembly”).
5. Unscrew the two capacitor clamp screws from the center
mounting plate.
6. If the wire tie mentioned in the note above restricts the
movement of the wire attached to C3, gain access to the
rear compartment and cut the wire tie.
DANGER
DC capacitors may be charged even with power
disconnected from the rectifier. This would be true if the
main bus bar fuses are open. Always check all of the dc
capacitor terminals (observe polarity) with a voltmeter
before performing this procedure. Discharge capacitors in
a safe manner, if necessary.
Note
To successfully perform this procedure, it is usually
necessary to have access to the rear compartment of the
rectifier (see note following Step 5.
Note
There is a wire from C3 to the dc inductor L2 that is
mounted in the rear compartment. This wire is usually
held to another wire in the rear compartment by a wire tie.
The tied wire restricts tilting the top of the capacitors
forward, which is necessary in order to access their
mounting screws. If this wire tie is not in place, access to
the rear compartment is not necessary in order to remove
the dc capacitors.
