Siemens SENTRON 3VA27 - Page 206

Operation
6.2 Alarms
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
204 Manual, 10/2018, L1V30499596002-01
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.
LED displays of the protection releases
L
S
I
G
Alarm / status
Measure / comment
Flashing fast
(2 Hz)
Flashing fast
(2 Hz)
Flashing fast
(2 Hz)
Flashing fast
(2 Hz)
Auxiliary solenoid
closing coil / shunt
release (CC/ST) not
connected or
trip command failed
Check connections.
Flashing slowly
(0.5 Hz)
Flashing fast
(2 Hz)
Flashing fast
(2 Hz)
Flashing fast
(2 Hz)
Current sensor not
connected
Check connections.
Flashing slowly
(0.5 Hz) with 2 s
pause
Flashing slowly
(0.5 Hz) with 2 s
pause
Flashing slowly
(0.5 Hz) with 2 s
pause
Flashing slowly
(0.5 Hz) with 2 s
pause
Fault in rating
plug
Check the connection
between the release
and the rating plug.
Perform installation.
Flashing slowly
(0.5 Hz)
Flashing slowly
(0.5 Hz)
Flashing slowly
(0.5 Hz)
Flashing slowly
(0.5 Hz)
Internal configu-
ration error
Contact Siemens
Technical Support.
On
On
Tripping on hardware
fault
Check the circuit brea-
ker and accessories.