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