ABB | SACE Emax 2
Putting into service and maintenance | 2 - Identification of alarms or failures
249 | © 2013
ABB |
1SDH001000R0002 - L7804
Continued from the previous page
Faults
Possible causes
Suggestions
Tripping times shorter
than expected
Selected threshold too low
Correct the threshold
Wrong curve selected
Correct the curve
Thermal memory enabled
Disable it if it is not necessary
Incorrect Neutral selection
Correct the neutral selection
Zone selectivity enabled
Disable it if it is not necessary
Tripping times longer
than expected
Threshold too high
Correct the threshold
Curve too high
Correct the curve
Wrong curve selected
Correct the curve type
Incorrect Neutral selection
Correct the neutral selection
Rapid trip with I3=Off
linst trip
Correct operating condition
with short circuit at high
current
High earth current, but
no trip occurs
Incorrect selection of the
sensor
Set internal or external sensor
Function G inhibited with I>4In Correct condition of operation.
Display off
Vaux lacks current and/or the
voltage is less than minimum
value
Correct condition of operation.
Temperature outside range
Correct condition of operation.
The display is not backlit
Current and/or voltages below
the display switch-on limit
Correct condition of operation.
Incorrect current reading
Current below the minimum
threshold that can be
displayed
Correct condition of operation.
Incorrect voltage, power
and cos
φ
reading
Incorrect connection between
external voltage transformer
and Ekip Measuring
Check the connections
between the voltage
transformer and Ekip
Measuring
Voltage parameter setting
error
Set the correct parameters
The expected trip does
not occur
Trip function disabled
Correct condition of operation.
Enable trip if necessary
No activation of the
Unbalance protection U
Values outside range
Correct condition of operation.
Opening data not
displayed
Vaux absent and/or battery low Correct condition of operation.
The password is not
requested
The password was disabled or
already inserted recently
Corrected condition of
operation, reset the password
with a value other than “0000”
Impossible to change
any of the parameters
Release in alarm condition
Correct condition of operation.