ABB SACE Emax 2 Installation, Operation And Maintenance Instructions page 98
Low voltage air circuit-breakers
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96 | © 2014 ABB | 1SDH000999R0002 - L8569
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Faults
It is not possible to remove
the circuit-breaker from
extracted to removed
Tripping times shorter than
expected
Tripping times longer than
expected
Rapid trip with I3 = Off
High earth current, but no trip
occurs
Display off (if present)
The display is not backlit (if
present)
Incorrect current reading
Incorrect voltage, power and
cos φ reading
The expected trip does not
occur
No activation of the Unbal-
ance protection U
Opening data not displayed
The password is not
requested
Possible causes
Fail Safe lock active
Selected threshold too low
Wrong curve selected
Thermal memory enabled
Incorrect neutral selection
Zone Selectivity enabled
Threshold too high
Curve too high
Wrong curve selected
Incorrect neutral selection
linst trip
Incorrect selection of the sensor
Function G inhibited with I > 4In
No auxiliary power supply and the
current and/or voltage is less than
minimum value
Temperature outside range
Current and/or voltages below the
display switch-on limit
Current below the minimum thresh-
old that can be displayed
Incorrect connection between isola-
tion transformer and Ekip Measuring
Voltage parameter setting error
Trip excluded
Values outside range
No auxiliary power supply and/or
battery low
The password was disabled or
already inserted recently
Putting into service and maintenance | 2 - Identification of alarms or failures
ABB | SACE Emax 2
Suggestions
Discharge the closing springs of the
command
Correct the threshold
Correct the curve
Disable it if it is not necessary
Correct the neutral selection
Disable it if it is not necessary
Correct the threshold
Correct the curve
Correct the curve type
Correct the neutral selection
Correct operating condition with
short circuit at high current
Set internal or external sensor
Correct condition of operation.
Correct condition of operation.
Correct condition of operation.
Correct condition of operation.
Correct condition of operation.
Check the connections between
the isolation transformer and Ekip
Measuring
Set the correct parameters
Correct condition of operation. En-
able trip if necessary
Correct condition of operation.
Correct condition of operation.
Corrected condition of operation, re-
set the password with a value other
than "0000"
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