9
6LE007331A
Sentinel electronic trip unit
2.2 Display
Description of the display
Sentinel electronic trip units are equipped with a display which makes it possible to adjust
settings, visualise the instantaneous load current and see the tripping causes of hw+ circuit
breaker along with other alarm indications.
A
Z
E
6
7
8
9
1
2
3
4
5
R
1
Overload indicator
: displayed as soon as the current exceeds 105% of Ir.
2
Error indicator
: displayed when an error is detected.
3
Maintenance indicator
: displayed when a maintenance intervention is required.
4
Text display area
: displays the name of the protection parameter during adjustment or after a trip in
addition to the error codes of detected operating system alarms.
5
Low or missing battery indicator
: displayed if the electronic trip unit backup battery needs
changing or is not connected.
6
Trip
indicator
: together with the digital display zone, the text display zone and the phase display,
enables the cause of the tripping to be precisely determined.
7
Overload indicator
: flashes as soon as the current exceeds 105% of Ir and is lit and steady above
112.5% Ir
8
Overload pre-alarm indicator
: warns of an imminent tripping risk.
9
ReadyToProtect indicator
: displayed when the trip unit is operational and ready to protect.
A
Digital display zone
: used to display the values of the various settings and what the tripping value
was, using the following units.
A
Ampere
Â
Peak amperage
S
Second
I²t
I²t curve
Also displays the codes of the hardware alarm triggering system.
Z
Phase display
: Neutral on the left / Phase L1 / Phase L2 / Phase L3.
E
Reference screen
: shows the number of screens in the trip unit as well as its position in the display
order.
R
Bargraph:
used to view the currents read on the most highly loaded phase L1, L2 or L3 as a
percentage of the Ir setting.
