B2342
Emax VF
27/66
Doc. No
Model
Apparatus
Scale
Page No
1SDH000909R0001
9. Measures to be taken for any operating anomalies
The circuit-breakers does not open when the opening button is pressed
Anomalies
The circuit-breakers does not open when the YO operating release is tripped
The circuit-breakers does not open when the YU undervoltage release is tripped
The circuit-breakers does not open when the protection relay release test is run
The circuit-breakers does not shut when the close button is pressed
The circuit-breakers does not shut when the YC closing coil is tripped
The closing springs cannot be loaded by the manual loading lever
The closing springs cannot be loaded by the spring loading motor
The crank does not fit in the moving part
The moving part does not rack into the fixed part
The circuit-breakers cannot be locked in the open position
Possible causes
Checks and remedies
•
The opening solenoid of the relay is not
inserted correctly
Check that opening solenoid is connected
correctly
• • •
Warning that tripped relay has not been
reset
Press the mechanical pushbutton to reset
signal relay tripped
•
•
Auxiliary circuit power supply voltage too
low
Measure the voltage: it must not be less
than 85% of the rated nominal coil voltage
•
•
Different power supply voltage from the
one indicated on the rating plate of the
releases
Check the rating plate voltage of the
releases
•
Operating circuit faulty
Check connections, fuses, interlocks,
protection circuit-breakers and consent
contacts
•
•
•
Screws for clamping loose wires and auxil-
iary circuits
Check tightness of the screws connecting
the wires
•
•
•
Incorrect electrical connections in the
power supply circuit
Check the connections with the corre-
sponding circuit diagram
•
•
Damaged coil
Replace the coil
•
•
Operating mechanism blocked
Operate by hand. If the fault persists please
contact ABB SACE
• •
Key locked in open position
Unlock by inserting the key
• •
Circuit-breaker in intermediate position
between connected and test
Complete the insertion operation
• •
Undervoltage release not energized
Check the corresponding power supply
circuit and the power supply voltage
• •
Shunt opening release permanently ener-
gized
Check the power supply circuit
•
Racking-in or out operation not carried out
correctly
See paragraph 7.3
•
•
•
Locked control
Contact ABB SACE
• •
Extraction crank inserted
Extract crank
•
Circuit-breakers in extracted position
Turn circuit-breakers to test or inserted
position
•
Protection fuse tripped, spring-loading
motor
Replace fuse
•
Reduction gear fault due to automatic load-
ing of springs
Replace reduction gear
•
Movable part incompatible with the fixed
part
Check that the movable part is compatible
with the fixed part
•
•
Circuit-breakers closed
Press the opening button and activate the
lock
•
Faulty open lock
Contact ABB SACE
WARNING: Persistent malfunction or non-operation of the circuit-breaker could cause injury to personnel or
damage to property, remove the circuit-breaker immediately until it can be inspected or repaired.