Lucent Technologies Lineage
®
2000 200A Ferroresonant Rectifier J85503B-2
Issue 8 January 1999
Product Description 2 - 3
Electronic
Current Limit
The rectifier provides a constant output voltage up to its rated
output current, at which point it provides constant current. This
current limit set point is typically adjustable from 30 to 110
percent of the rectifier rating, 60 to 220 amperes. When the
output current tends to increase above the current limit setting,
the current limit circuit overrides the voltage regulating signal
and limits the output current of the rectifier.
Backup Current
Limit
In addition to the electronic current limit, the ferroresonant
transformers are naturally current limiting to 125 to175 percent
of full load, or 250 to 350 amperes.
Selective High
Voltage
Shutdown
If the battery voltage goes too high, a Lineage
®
2000 controller
signals all of the connected rectifiers. This signal causes the
rectifier(s) delivering more than 10 percent of full load to shut
down. The remaining rectifiers continue to operate. The
J85503B-2, 200 ampere also accepts a selective high voltage
shutdown (HVSD) signal from any external source via the
interface board.
Internal Selective
High Voltage
Shutdown
(ISHVSD)
The rectifier will sense a high voltage condition at its output
terminals. If delivering more than 10 percent of its rated output,
20 amperes, the rectifier shuts down. This high voltage threshold
is user-selectable via programmable DIP switches. The ISHVSD
is a backup to the selective HVSD.
Backup High
Voltage
Shutdown
(BUHVSD)
This circuit operates if the selective HVSD or ISHVSD fails to
operate. The circuit prevents damage to the rectifier or
connected equipment in the event of high battery voltage. Each
rectifier senses its own output voltage, and when the voltage
exceeds a preset value, the rectifier shuts down. The backup high
voltage threshold is user-selectable via programmable DIP
switches. This circuit operates from an independent voltage
source in order to provide improved reliability of the high
voltage shutdowns.
Dynamic
Response
For any step load change of 10 to 90 percent, or 90 to 10 percent,
or a step change of 10 percent of the input voltage, the sense
point voltage remains within 5 percent of its setting, and returns
and remains in the 1/2 percent band within 300 milliseconds.
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Страница 72: ...Lucent Technologies Lineage 2000 200A Ferroresonant Rectifier J85503B 2 5 22 Installation Issue 8 January 1999 ...