Siemens SENTRON 3WA1 - Operating Keys; LED Displays

Description
2.4 ETU300 electronic trip unit
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
79
2.4.2.2 Operating keys
The trip cause stored in the ETU300 can be deleted via the CLEAR operating key.
Pressing the TEST operating key starts the internal self-test of the ETU.
(1)
CLEAR and TEST operating keys
Internal self-test
The internal test function with tripping of the circuit breaker can be started by pressing
the two CLEAR and TEST operating keys simultaneously and for a long time and then
releasing the CLEAR key.
The internal self-test can be canceled by pressing and holding the CLEAR key.
For more information about the internal self-test, see Chapter Internal self-test ETU300
(Page 173).
2.4.2.3 LED displays
Status information of the ETU300 electronic trip unit and the last trip cause are indicated
by LEDs.
LED
Meaning
Description
ACT (active)
Activation of the ETU
Off
Electronic trip unit not activated
Flashing
(frequency: 1 Hz)
Electronic trip unit activated