Page 260 - Sace Emax 2 Manual for design engineers

Continued from the previous page ABB | SACE Emax 2
Faults Possible causes Suggestions
The operating mechanism is blocked Contact ABB
Measure the voltage: it should not be
The power supply voltage of the
auxiliary circuits is too low lower than 85 % of the rated voltage
of the coil
The power supply voltage is different Use the correct voltage
The circuit-breaker from that indicated on the rating plate
doesn't open when the Make sure there is continuity between
opening coil is powered The cables of the coil are not inserted cable and terminal and if necessary
correctly in the terminals reconnect the cables of the coil to the
terminals
The connections of the power supply Check the connections using the
circuit are wrong relevant wiring diagram
The opening coil is damaged Replace the coil
The circuit-breaker Perform the opening operation
doesn't open despite The operating mechanism is blocked manually; if the fault persists contact
the command of the ABB
undervoltage coil
It is not possible to
charge the closing
springs by means of the The operating mechanism is blocked Contact ABB
manual charging lever
Make sure there is continuity between
The cables of the gearmotor are not cable and terminal and if necessary
inserted correctly in the terminals reconnect the cables of the gearmotor
to the terminals
It is not possible to The connections of the power supply Check the connections using the
charge the closing circuit are wrong relevant wiring diagram
springs by means of the
gearmotor The circuit-breaker is in disconnected Switch the circuit-breaker to the test
position or connected position
The gearmotor protection internal fuse
has tripped Replace the fuse
The gearmotor is damaged Replace the gearmotor
It is not possible to press Press the opening pushbutton in order
the button in order to The circuit-breaker is closed to allow the insertion of the crank with
insert the racking out
crank handle the circuit-breaker open
See chapters "Circuit breaker racking-
The racking-in/racking-out operation is
It is not possible to insert not performed correctly in/racking-out operations" on pages
the moving part in the 150 158
fixed part The moving part is incompatible with Check the compatibility between the
the fixed part moving part and the fixed part
It is not possible to lock The opening pushbutton is not being Press the opening pushbutton and
the circuit-breaker in the pressed activate the lock
open position The lock in open position is defective Contact ABB
Check Trip coil connection and
Trip coil is not connected properly
It is not possible to messages on display
perform the trip test CB trip signal has not been reset Press the reset pushbutton
The busbar current is greater than zero Correct operating condition.

Continued on the next page

258 | © 2020 ABB | 1SDH001330R1002 - ECN000134959 - Rev. A Alarms or failures | 1 - Identification of alarms or failures