User Manual

Description
2.4 Electronic trip unit ETU600
3WA Air Circuit Breakers
82 Equipment Manual, 05/2021, 92310000002-03
2.4.3.4 Display after a trip
Note
Trip indication via the display is only possible with an activated ETU600 electronic trip unit.
Alternatively, after pressing the “QUERY” button on the ETU front, the last trip cause can be
displayed via LED.
If the electronic trip unit was activated without interruption for two hours or more, the trip
cause LED can light up for at least 10 s.
A trip of the circuit breaker is indicated by an orange trip cause LED, stored in the trip log of
the ETU600, and shown on the display with “TRIP”.
After acknowledging the trip by pressing the F4 operating key, details regarding the trip
become visible. These always contain:
• Sequence number of the trip
• Trip cause with specification of the phase
• Associated setting
• Time stamp and last metering values before tripping
The trip is acknowledged via the F1 operating key. After acknowledgement, the system
returns to the menu page which was displayed before tripping.
Note
For circuit breakers without external power supply or a VTM680 voltage tap module, the
ETU600 will not be active after tripping. In order to obtain detailed information about the trip
cause, the ETU600 can be activated via the USB-
C interface via a notebook, USB power supply
unit, or battery pack.