ABB Sace Emax 2 Installation, Operation And Maintenance Instructions For The Installer And The User page 57

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Continued from the previous page
Faults
It is not possible to remove
the circuit-breaker from the
disconnected position
Trip times different than
expected
Rapid trip with I3 = Off
High ground-fault current,
but no trip occurs
Display off and/or not
backlit
Measurements incorrect or
absent (current, voltage,
etc)
Opening data not displayed
The language cannot be
changed
Possible causes
Fail Safe lock active
Wrong threshold/time/curve
selected
Thermal memory enabled
Zone selectivity enabled
Incorrect neutral selection
linst trip
Incorrect selection of the sensor
Function G inhibited owing to
high current
No auxiliary supply or currents
lower than minimum turn-on
values
Temperature outside range
Current below the minimum
threshold that can be displayed
Harmonic distortion and/or crest
factor off range
No auxiliary power supply and/or
battery low
Trip unit set remotely
Putting into service and maintenance | 2 - Identification of alarms or failures
ABB | SACE Emax 2
Suggestions
Discharge the closing springs of
the command
Correct parameters
Disable it if it is not necessary
Disable it if it is not necessary
Modify the neutral selection
Correct operating condition with
short circuit at high current
Set internal or external sensor
Correct operating condition (see
use cases in the chapter that
describes the protection)
Correct operating condition.
Correct operating condition.
Correct operating condition.
Correct operating condition.
Correct operating condition.
Set it in local mode