ABB SACE Emax 2 Installation, Operation And Maintenance Instructions - page 98
ABB | SACE Emax 2
96 | © 2014
ABB |
1SDH000999R0002 - L8569
Putting into service and maintenance | 2 - Identification of alarms or failures
Continued from the previous page
Faults
Possible causes
Suggestions
It is not possible to remove
the circuit-breaker from
extracted to removed
Fail Safe lock active
Discharge the closing springs of the
command
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 (if present)
No auxiliary power supply and the
current and/or voltage is less than
minimum value
Correct condition of operation.
Temperature outside range
Correct condition of operation.
The display is not backlit (if
present)
Current and/or voltages below the
display switch-on limit
Correct condition of operation.
Incorrect current reading
Current below the minimum thresh-
old that can be displayed
Correct condition of operation.
Incorrect voltage, power and
cos
φ
reading
Incorrect connection between isola-
tion transformer and Ekip Measuring
Check the connections between
the isolation transformer and Ekip
Measuring
Voltage parameter setting error
Set the correct parameters
The expected trip does not
occur
Trip excluded
Correct condition of operation. En-
able trip if necessary
No activation of the Unbal-
ance protection U
Values outside range
Correct condition of operation.
Opening data not displayed
No auxiliary power supply 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, re-
set the password with a value other
than “0000”