100
6LE007331A
Replacing the backup battery
When the low or missing battery indicator appears, the electronic trip unit backup battery
must be replaced.
The backup battery can be replaced with the circuit breaker open or closed.
To do so:
1
1
Low or missing battery indicator
Action
Illustration
1
If necessary, remove
the seal to open the
transparent cover
protecting access to the
trip unit.
ATTENTION
If the backup battery is discharged, the electronic trip unit will be unable to display
the cause of any tripping unless an external Hager HTG911H 24 V DC power supply is
connected to the TU 24 V +/- terminal block of the inputs and outputs or if an external
battery is connected the USB-C port of the electronic trip unit.