Siemens SENTRON 3WA1 - Self-Monitoring and Diagnostics; Internal Self-Test; General; Internal Self-Test ETU300

Description
2.9 Self-monitoring and diagnostics
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
173
2.9 Self-monitoring and diagnostics
2.9.1 Internal self-test
2.9.1.1 General
For commissioning and a functional check, the electronic trip unit has various integrated
test functions depending on the scope of functions. These end with or without tripping
the circuit breaker.
Requirements:
• Electronic trip unit is activated.
• Operational current is not in the overload range.
2.9.1.2 Internal self-test ETU300
(1)
CLEAR button
(2)
Trip cause LED L
(3)
TEST button
Test function without tripping
The internal test function without tripping the circuit breaker is started by pressing the
TEST button.
An ongoing test is indicated by a running light of the trip cause LEDs from left to right
over the set tripping time t
r
.
The execution of the internal test function can be canceled by pressing the CLEAR
button for longer than 700 ms.
If the test is completed successfully, the trip cause LED L lights up for 30 seconds. If an
error was detected during the internal self-test, this is indicated by the red INFO LED.
Test function with tripping
The internal test function with tripping of the circuit breaker is started by simultaneously
pressing the TEST and CLEAR buttons for a long time (> 700 ms) and then releasing the
CLEAR key.