WEG ABW Serie Manual De Instrucciones página 48

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Defect
The circuit breaker
opens instantaneously
to a closing operation,
and the mechanical
reset button goes out.
The circuit breaker
opens normally by
manual command,
but not by electrical
command.
The circuit breaker
does not open by
manual command.
The circuit breaker
does not close, by
manual or electrical
command.
The circuit breaker
closes normally by
manual command,
but not be electrical
command.
48 ABW - Air Circuit Breaker
probable cause
1. There is a short-circuit.
2. Very high current in
closing.
1. Very low control voltage.
2. Defect in undervoltage
coil.
1. Defect in operation
mechanism.
1. The circuit breaker
closed under short-circuit.
2. Mechanical reset button
was not reset.
3. Instability in operation of
extraction/insertion.
4. Anti-pumping function.
5. Unloaded springs.
6. Defect in closing coil.
7. Energized opening coil.
8. Defect or undervoltage in
undervoltage coil.
9. Circuit breaker with
mechanical interlocking
installed.
1. Very low control voltage
in closing coil.
2. Defect in closing coil.
Corrective actions
1. Eliminate short-circuit before
reconnecting circuit breaker.
2. Check the electrical circuit or revise
protection unit adjustment parameters.
1. Check control voltage (0.6~1.1Vn).
2. Change undervoltage coil.
1. Contact WEG.
1. Eliminate short-circuit. Check state of
circuit breaker.
2. Reset the mechanical reset button.
3. Check operation of extraction/insertion.
4. Try again, after de-energizing closing
coil.
5. Check power supply of motorized drive.
Check if manual loading functions suitable.
6. De-energize closing coil. Re-energize coil
and check operation of circuit breaker.
7. De-energize opening coil.
8. Energize undervoltage coil (V>0.85Vn)
and try to close the circuit breaker by
closing coil.
9. Check mechanical interlocking.
1. Check command voltage (0.75~1.1Vn).
2. Change closing coil.