Siemens SENTRON 3WA1 - Page 82

Description
2.4 ETU300 electronic trip unit
3WA1 air circuit breaker
80 Equipment Manual, 02/2023, 92310000002-06
LED
Meaning
Description
AL (alarm)
Two-stage overload alarm
Off
Current is less than 90% of the set value Ir of
the overload protection
On
Current in a phase is between 90% and 100%
of the set value Ir of the overload protection
On
Current in a phase is greater than or equal to
the setting Ir of the overload protection
INFO
Display of status
information
Off
Normal operating state
On
Warning is present
On
Error present
DAS+
DAS+ maintenance
mode
Off
DAS+ not activated
On
DAS+ activated
L, S, I, G
Last trip cause
Off
Normal operating state
On
Tripping due to:
L
Long time LT
S
Short-circuit ST
I
Short-circuit INST
G
Ground fault GF
If the ETU300 is not activated, the trip cause can be displayed by pressing the Query button. A
prerequisite for the display of the trip cause is that the ETU300 was activated for at least 2 hours
before the tripping operation. The trip cause is stored for 24 hours in this case.
Additional information on the display of error messages can be found in Chapter Display
of errors and alarms (Page 181).