Lucent Technologies -48V CPS4000/CPS4000 PLUS Cabinet Power System
Issue 13 December 2000 Glossary Appendix C - 1
Appendix
C
Glossary
AC Fail An indicator found in CPS plants, this alarm is issued (yellow LED)
when the ac service voltage to a rectifier falls below the normal input
operating voltage range.
ACU The Alarm Control Unit (ES647) provides plant monitoring, display and
control features, and office alarm outputs.
Alarm This red LED lights to indicate that a rectifier has shut down due to an
output under voltage condition, a thermal alarm, or an operated internal
fuse.
Alarm Return (AR) A signal path between the control unit and the battery modules that
provides a common return path for alarm signals.
Ampere Hour (AH) Ampere hour is a rating for batteries that specifies duration of a
discharge for a given load. It is a convention for expressing “drain (or
load) current” multiplied by time.
Average
Busy-Hour
Current Drain
The average busy-hour current drain during busy season with the plant
operating at the normal voltage.
Batt Major Alarm A signal to the Control Unit indicating that a battery temperature is
above 65 degrees Celsius.
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