Siemens SINOVA - Electronic Components; Protection Function Settings and Characteristics

Description
2.2 Electronic components
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01
49
Protection function has tripped (overcurrent)
• Indicator lights up when the "QUERY" button is
pressed
• Only one reason for tripping is displayed
• Only the last reason for tripping is displayed
T.U. ERROR LED
1st T.U. Error flashes:
The protection function is restricted; the protection
parameters are reset to the minimum values.
Cause:
• Electronic trip unit defective
2nd T.U. Error lights up continuously:
The protection function is not ensured.
Cause:
• Electronic trip unit defective