ABB VD4G-25 Installation And Operating Instructions Manual page 34

V D 4 G I N S TA L L AT I O N A N D O P E R AT I N G I N S T R U C T I O N S
34
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9. Maintenance
9.2.3. Circuit-breaker pole
No further inspections are necessary beyond those
already described in sect. 9.2.1.
9.2.4. Withdrawable assembly (truck and circuit-
breaker)
Visually inspect the components, especially those
which may have been damaged by incorrect
operations (also consult chap. 8).
Visually inspect the isolating contacts and clean all
contact parts, especially where signs of overheating
are found (also consult sect. 9.4.).
Visually inspect the locks. Perform functional tests
to make sure that they operate properly and activate
without abnormal force - maximum 25 N (also con-
sult the table in chap. 8).
9.3. Servicing
9.3.1. Pole and conductive parts
Comply with the following procedure if the devices
had to be cleaned during the inspections, as
specified in sect. 9.2.1:
• isolate the work area and make it safe, following
the safety regulations specified in standards IEC/
DIN VDE;
• general cleaning of surfaces:
- dry and remove light deposits of dirt with a soft
dry cloth;
- more resistant dirt can be removed using slightly
alkaline domestic type detergent or Rivolta BWR
210 detergent;
• clean the insulating surfaces and conductive parts
with a suitable detergent.
After cleaning, thoroughly rinse with clean water
and dry carefully.Apply fresh grease if necessary.
Note
Only use halogen-free detergents and never 1.1.1-trichloroethane,
trichloroethylene or carbon tetrachloride!
9.3.2. Release devices: actuator and transmission
system
Circuit-breakers up to 15 kV, 1250 A, 25 kA.
Inspection and maintenance should be performed
after every 5,000,000 operations to ensure the
circuit-breaker functions correctly. Contact ABB
Service.
The damper and other components of the
transmission system (shaft, main levers, safety
rings, etc.) must be totally replaced after 10,000
operations.
Circuit-breakers up to 15 kV, 40 kA and with Twin
actuator
Inspection and maintenance must be performed
after every 5,000,000 operations to ensure the
circuit-breaker functions correctly. Contact ABB
Service.
The damper and other components of the
transmission system (shaft, main levers, safety
rings, etc.) must be totally replaced after 10,000
operations.
Note
Dismantling and replacement of the operating mechanism (trip box) can
only be carried out by ABB personnel or by skilled and specially trained
personnel, particularly as regards the necessary adjustments.
Details about servicing
• When required, cut off the power supply to the
spring loading motor and discharge the springs of
the operating mechanism in the manual mode by
closing and opening the circuit-breaker.
• Replace parts subject to mechanical stress or
stress due to particular ambient conditions,
(contact an ABB service center).
• Refer to maintenance instruction manual
1VCP000558 for further details.
Note
These operations can only be carried out by ABB personnel
or by skilled and specifically trained personnel.