User Manual

Description
2.4 Electronic trip unit ETU600
3WA Air Circuit Breakers
Equipment Manual, 05/2021, 92310000002-03
71
2.4.2.2 Display and operating keys F1 to F4
The ETU600 electronic trip unit has an integrated color display. This can be used to display
metering values, set parameters, and report events.
The four operating keys F1 to F4 are assigned menu-dependent actions. One to four
operating keys can be active.
(1)
Action that is executed by the assigned operating key
(2)
Operating keys
The display is also used for detailed representation of events. A description of selected events
is given in Chapter Display and menu structure (Page 76).
2.4.2.3 LED displays
Status information of the ETU600 electronic trip unit and the last trip cause are indicated by
LEDs.
LED
Meaning
Description
ACT (active)
Activation of the ETU
Off ETU not activated
Flashing
(frequency: 1 Hz)
ETU activated
AL (alarm)
Two-stage overload alarm
Off Current is less than the set alarm threshold AL1
On Current in a phase exceeds the alarm threshold 1
On Current in a phase is greater than or equal to the
setting Ir of the overload protection