1256LE008146B
Alarm management
7.9 Maintenance and backup battery alarms
Low or absent back-up battery alarm
The backup battery powers the trip unit's internal clock and the display of the trip alarms after
a tripping (if an external 24 V DC power supply is connected the backup battery will not be
engaged).
The sentinel Energy trip unit monitors the presence of the backup battery and provides an alert
if it detects it is lost due to being missing or having a charge level that is too low.
The low or missing back-up battery alarm appears on the sentinel Energy display in the form
of an icon in the notification area.
ATTENTION
If a low or missing battery alarm appears, check that the backup battery is present and
refer to the maintenance guide 6LE007897A.
1
Low or missing battery alarm icon.
LONG TIME
Ir
Ir
0.5s
tr
Thi
CURVE
1
640A
0.40xIn
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