Lucent Technologies Lineage
®
2000 25A Ferroresonant Rectifier J85502A-1
Issue 4 May 1998
Product Description 2 - 5
point voltage remains within 5 percent of its setting, and returns
and remains in the 1/2 percent band within 300 milliseconds.
For batteryless operation, for any step load change of 50 to 90
percent, or 90 to 50 percent, or a step change of 10 percent of the
input voltage, the sense point voltage remains within 10 percent
of its setting, and returns and remains in the 2 percent band
within 500 milliseconds.
Electromagnetic Compatibility
The J85502A-1, 25-ampere rectifier complies with FCC Docket
20780, Part 15, Subpart J as required for Class A applications. In
addition, the rectifier meets all specified operating
characteristics when subjected to electric fields up to 10 volts per
meter over a frequency range of 20 to 1000MHz.
Circuit Modules
The rectifier's signal processing and control circuitry are located
on replaceable circuit modules or packs. Circuit modules are
plug-in boards that can be ordered separately. Table 8-A lists
recommended spare parts for the rectifier. All circuit modules
are accessible by opening the rectifier door. Figure 5-2 shows the
location of the circuit modules and other features of the rectifier.
Figures 6-2, 6-3, and 7-1 show the CM1, CM2, and CM3 board
layouts, respectively. A description of each module follows.
•
The CM1 circuit module (ED83158-30 Group 2, A)
contains circuitry common to several rectifiers in the
Lineage
®
2000 rectifier family. The factory provides the
options required for each application by removing certain
wire straps and resistors from the CM1 board. The factory
modification of CM1 is complete when the board is
installed in the rectifier. However, ordered spare or
replacement CM1 boards have not been modified. The
customer must make this modification. See Section 8 for
information on parts to be removed and retained.
•
The CM2 circuit module (205A1 control board) contains
the following circuits:
Local power supplies
Feedback regulator
Walk-in feature
Backup high voltage shutdown (BUHVSD)
Rectifier portion of external selective HVSD
