Advertisement
PART B Installation, Operation & Maintenance
Maintenance
operation
Connection of
electronics
circuit
Cleaning of
electronic circuit
Retention of
spring circlips and
spring washer
6.3 General Inspection of the circuit breaker
Part
subjected to
Spring
operated
mechanism
High voltage
breaker pole
parts
Installation in
normal ambient
2 years
2 years
2 years
Abnormalities noticed
Presence of dust on the
mechanism
Distorted or oxidised spring
Locking rings out of place,
loose nuts or screws.
Presence of dust or dirt on the
the insulating parts
Locking rings out of place,
loose nuts or screws.
Distortion or cracking of the
insulating parts
Trace of overheating or loose
screws on the connection to
the circuit breaker terminals
Installation in
Dusty or polluted
ambient
1 year
1 year
1 year
Remedies
Clean with a dry brush or
cloth
Replace the damaged
spring
Re-fix the locking rings in
Their position and tighten
the nuts & screws
Clean with a dry brush or
cloth
Re-fix the locking rings in
Their position and tighten
the nuts & screws
Ask ABB Nasik for
replacement of the
damaged parts
Clean the connections and
the breaker terminals with
a rough rag soaked in a
suitable solvent cover them
with neutral grease and
tighten the screw
31
Advertisement
