Lucent Technologies 415B Battery Plant for 4ESS
7 - 62 Retrofit of 415A Battery Plant
Issue 6 September 1999
Miscellaneous
Alarms
BD and VLV
Alarms
1. With all rectifiers off, apply a 100-ampere test load to the
plant. Observe the plant voltage on the front panel of the
Galaxy. Verify that the BD alarm is generated at
149±1Vdc. The Battery on Discharge (BD) and a MAJ
alarm will be displayed at Galaxy and a PMJ alarm
remoted.
Note: It may be necessary to use less than 100 amperes
in order to accurately determine the BD alarm level.
2. Turn all rectifiers on; set plant load to 400 amperes.
Change the VLV setting on the Galaxy to 143+1/-0 volts
using the path MENU
→
CONFIG
→
THRESHOLD.
3. Turn rectifiers off.
4. Allow batteries to discharge to threshold of Very Low
Voltage (VLV). Verify that a VLV alarm is activated along
with PMJ and critical at 143±1 volts.
Note: It may be necessary to increase or decrease the
load to verify the alarm level.
5. Return rectifiers on line. Decrease load to 100 amperes.
Verify that the alarms are retired after the voltage increases
above 143±1 volts.
6. Using the path MENU
→
CONFIG
→
THRESHOLD,
restore the VLV setting to 133 volts.
Battery String
Fuse
1. With batteries connected and a 50 to 100-ampere load,
insert or simulate a blown alarm fuse at battery string #1.
The LED lights at the battery string fuse holder. External
fuse major and OS MAJ alarms are generated, and BATT,
DIST, and MAJ LEDs light on the Galaxy front panel.
Verify that visual and audible Local Office alarms are
initiated and that a remote alarm has been received at the
Alarm Center.
2. Repeat procedure for all battery strings.
