Lucent Technologies -48V CPS4000/CPS4000 PLUS Cabinet Power System
Issue 13 December 2000 Alarms, Controls, and Displays 7 - 17
Plant Battery Test (PBT)
Introduction A plant battery test feature is available that allows the user to test battery
health and capacity safely without jeopardizing the load; i.e., a user
supplied contact closure across J6-29 and J6-30 will reduce the rectifier
output voltage set point to approximately 48 volts, which creates a
battery on discharge condition.
SW1 is used to enable the Plant Battery Test and Rectifier On/Standby
feature.
Plant Voltage
Indication
If the batteries are present and healthy, the plant voltage will remain
above 48 volts. If the batteries are not present or are not able to support
the load, the plant voltage will immediately drop to approximately 48
volts without any consequence to the load.
Determining
Reserve Capacity
If the batteries are present and working, the user may then safely place
the rectifiers in standby by placing a short across J6-28 and J6-30 in
order to continue the discharge and further determine the reserve
capacity of the batteries.
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