8
6LE007331A
Sentinel electronic trip unit
2.1 Description
The following characteristics are common to all the versions of the Sentinel electronic trip
units:
In
1
6 0
0 A
=
1
2
3
4
5
6
3
7
1
Display
2
button used to:
- clear an alarm after the air circuit breaker
has tripped,
- navigate through the display screens.
3
Dials for making adjustments to the
Sentinel electronic trip unit.
4
Rated current value In of the air circuit
breaker. This value is provided by the
Rating Plug installed in the electronic trip
unit.
5
USB-C port to connect a battery.
The Sentinel electronic trip unit is self-
powered when the circuit breaker is in
service except when:
- if the circuit breaker is open or de-
energised after tripping,
- if the withdrawable circuit breaker is in
test or disconnected position.
In these cases, you are advised to
connect an external battery to this USB-C
port or an external 24 V DC power supply
(Hager HTG911H) to the TU 24 V +/-
terminals of the terminal block in order to
view the settings through the display.
This USB-C port also allows connection
to a computer equipped with the
Hager
Power Setup
commissioning software
(see chapter 4.1 Principle)
6
Backup battery powering the display after
electrical tripping.
It ensures that the alarm signals on the
display providing information of the cause
of the tripping are maintained.
7
Backup battery housing hatch.
