Accessories
3.7 Accessories for the Electronic Trip Unit
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01
87
Article No.
Manual function tester for electronic trip unit
View
LED for indicating the operating voltage
6 LEDs for indicating the test results
Preparatory work
• Open and disconnect the Circuit Breaker.
• Note the setting values of the electronic trip unit.
• Deactivate ground fault protection (if available) on the electronic trip unit (I
g = OFF).
• Setting value I
R = 1.0 In
• Remove the cover cap from test socket X25 on the ETU.
Equipment damage
If the hand-held test device is used while the Circuit Breaker is closed, this can cause false
tripping and destroy the hand-held test device.
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