Lucent Technologies Lineage
®
2000 200A Ferroresonant Rectifier J85503B-2
Issue 8 January 1999
Product Description 2 - 11
CM1
The CM1 circuit module (329A Fuse Board) protects the control
circuits from faults in the rectifier power train. It contains alarm
fuses, bleeder resistors, access points for the plant shunt voltage,
and an isolated RFA transfer contact.
CM2
The CM2 circuit module (208F1 Control Board) contains the
following circuits:
CM3
The CM3 circuit module (323D Digital Meter Board) controls
the digital Output meter and all indicators on the rectifier
control panel. The meter displays the rectifier’s output current,
voltage, or the plant battery voltage, depending on the position
of the selector switch. See Figure 2-2.
CM4
The CM4 circuit module (330C Interface Board) provides alarm
and control circuitry that permits the rectifier to interface with
various controllers. It also provides additional monitoring points
and new alarm interface points for AC fail, RFA test, load share,
LCA, and LSF.
CM5/CM6
The CM5 and CM6 circuit modules are identical boards,
ED83156-30 Group 3. These boards contain a triac/thyristor
snubber network and EMI circuitry. Refer to schematic drawing
SD83281-01 for further information.
CM7
The CM7 circuit modules (425C and 425D Transformer Boards)
contain the sense transformer, bleeder resistors, and walk-in
reset relay. Use of these boards depends upon ac input voltage.
Table 2-A: CM2 Circuits
Local power supplies
Restart feature
Feedback regulator
Unbalance shutdown
Walk-in feature
Fuse alarm
Backup high voltage shutdown
Electronic current limit
Remote shutdown
Output current isolation circuit
Manual on/off relay
Load share circuit
Phase monitor
RFA test
Rectifier portion of external selective high voltage shutdown
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