ABB SACE Emax 2 Series Installation, Operation And Maintenance Instructions page 253

249 | © 2013 ABB | 1SDH001000R0002 - L7804
Continued from the previous page
Faults
Tripping times shorter
than expected
Tripping times longer
than expected
Rapid trip with I3=Off
High earth current, but
no trip occurs
Display off
The display is not backlit
Incorrect current reading
Incorrect voltage, power
and cos φ reading
The expected trip does
not occur
No activation of the
Unbalance protection U
Opening data not
displayed
The password is not
requested
Impossible to change
any of the parameters
Possible causes
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 Correct condition of operation.
Vaux lacks current and/or the
voltage is less than minimum
value
Temperature outside range
Current and/or voltages below
the display switch-on limit
Current below the minimum
threshold that can be
displayed
Incorrect connection between
external voltage transformer
and Ekip Measuring
Voltage parameter setting
error
Trip function disabled
Values outside range
Vaux absent and/or battery low Correct condition of operation.
The password was disabled or
already inserted recently
Release in alarm condition
Putting into service and maintenance | 2 - Identification of alarms or failures
ABB | SACE Emax 2
Suggestions
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.
Check the connections
between the voltage
transformer and Ekip
Measuring
Set the correct parameters
Correct condition of operation.
Enable trip if necessary
Correct condition of operation.
Corrected condition of
operation, reset the password
with a value other than "0000"
Correct condition of operation.