ABB SACE Tmax XT7 Operation And Maintenance Manual page 25

23 | © 2020 ABB | 1SDH001821A1002 - ECN000135670
Continued from the previous page
Faults
It is not possible to charge the
closing springs by means of the
gearmotor
It is not possible to press the
button in order to insert the
racking out crank handle
It is not possible to insert the
moving part in the fixed part
It is not possible to lock the
circuit-breaker in the open
position
It is not possible to perform the
trip test
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
Possible causes
The cables of the gearmotor
are not inserted correctly in the
terminals
The connections of the power
supply circuit are wrong
The circuit-breaker is in
disconnected position
The gearmotor protection internal
fuse has tripped
The gearmotor is damaged
The circuit-breaker is closed
The racking-in/racking-out
operation is not performed
correctly
The moving part is incompatible
with the fixed part
The opening pushbutton is not
being pressed
The lock in open position is
defective
Trip coil is not connected properly
CB trip signal has not been reset
The busbar current is greater than
zero
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
Management operations | 2 - Maintenance and troubleshooting
ABB | SACE Tmax XT
Suggestions
Make sure there is continuity
between cable and terminal and if
necessary reconnect the cables of
the gearmotor to the terminals
Check the connections using the
relevant wiring diagram
Switch the circuit-breaker to the
test or connected position
Replace the fuse
Replace the gearmotor
Press the opening pushbutton
in order to allow the insertion of
the crank with the circuit-breaker
open
See the document
1SDH002013A1001
Check the compatibility between
the moving part and the fixed part
Press the opening pushbutton and
activate the lock
Contact ABB
Check Trip coil connection and
messages on display
Press the reset pushbutton
Correct operating condition.
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.
Continued on the next page