LEGRAND 0 281 64, Manual

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Protection unit
4. Test button
In order to verify correct functioning of circuit breaker and protection unit it’s possible to use test button .
Pushing it for more than two seconds makes the breaker trip .
Tripping sequence is:
1 . push “T” button for at least two seconds;
2 . all LEDs turn ON for one second (ON LED in orange, others in red);
3 . circuit breaker trips and all LEDs switch off, apart ON led, that switches from orange to green .