Operation
6.2 Alarms
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01
207
Alarms of ETUs of the 6-series
The electronic trip units of the 6-series indicate the signals and alarms on the display and
with the warning displays. This LED ACT additionally indicates that the ETU is ready for
operation.
①
LED ACT
②
Warning display 1
③
Warning display 2
④
"i Test" control key
⑤
Display
Display of the LED ACT
The LED name "ACT" stands for ACTIVE. This LED indicates that the ETU is ready for
operation. If the LED does not light up, the power supply of the ETU is interrupted and the
ETU is not ready to operate.
ACT
Alarm / status
Measure / comment
Flashing slowly
(1 Hz; 0.1 s on / 0.9 s off)
ETU ready
No measures required
Off
ETU without power supply
Check the power supply of the
ETU via the main circuit or the
auxiliary current conductors.