Air Circuit Breaker Interruptor Abierto Disjuntor Aberto ABW - Weg

open Circuit Breaker
5.3 perIoDIC InSpeCtIon
Monthly periodic inspections are recommended to assure the useful life of the circuit breaker.
Below are items to be inspected and recommended procedures.
external Appearance
Items
Method of
Inspection
Dust and debris Visual inspection
Power
connections
Flooding or
immersion in
water
Control
connections
General state of
cirucuit breaker
power Contacts
Items
Verification of
tightening torque
Visual inspection
Verification of
tightening torque.
Visual inspection
Method of
Inspection
Power contacts Visual inspection.
Power contacts Visual inspection.
Claws of the
removal carriage
Insulation
resistance
Visual inspection.
Criteria
There must not be dust or
debris deposited on the
circuit breaker.
Screws must be tightened
with torque of 60 Nm.
The circuit breaker must
not be used after the
occurrence of flooding or
immersion.
Bolts must be tightened
with torque of 1.0...1.2 Nm.
There must not be
cracks, damage and/or
deformations on the front
lid and base of the circuit
breaker.
68 | ABW English
Criteria
There must not be
discoloring of the contacts.
There must not be dust or
debris on the contacts.
See page 67. See page 67.
There must not be
discoloring of the claws or
deformations in the spring.
recommended
procedures
Removal of dust and debris
with vacuum and dry cloth.
Retighten with 60 Nm
torque.
Replacement of circuit
breaker.
Retighten with
recommended torque.
Replacement of the lid or, in
the case of damage at the
base, replacement of the
circuit breaker.
recommended
procedures
Replacement of the circuit
breaker in the case of
discoloring.
Cleaning of contacts.
Replacement of removal
carriage.
Replacement of circuit
breaker in the case of low
insulation resistance.