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5.2.5. vacuum interrupter housing
No check is required apart from what has already been
specified in par. “Operations before putting into service”.
5.2.6. Servicing
interruption devices in general
If cleaning is found to be necessary during the inspections, as
specified in par. “Operations before putting into service”, use
the following procedure:
• insulate the working area and make it safe by following
the safety regulations specified in the ANSI/NFPA70/NEC
Standards.
• general cleaning of the surfaces:
- dry and eliminate any light deposits of dirt using a soft dry
cloth;
- more resistant deposits of dirt can be removed using a
slightly alkaline household cleanser or Rivolta bwR 210
type detergent.
• cleaning the insulating surfaces and conductive
components:
- light dirt: with Rivolta bwR 210 detergent;
- resistant dirt: with cold 716 type detergent.
After cleaning, rinse thoroughly with clean water and dry
carefully
note
Only use halogen-free detergents and never trichloroethane,
trichloroethylene or carbon tetrachloride!
5.2.7. actuator and transmission system
A functional test of the drive must be carried out:
• when the number the number of operating cycles indicated
has been exceeded, (after 10,000 operation) or
• during maintenance operations.
before carrying out the functional test, open the circuit-
breaker and
• take it to the test position (withdrawable circuit- breaker) or
• insulate the working area and make it safe in conformity
with the safety rules and according to the regulations in
force (fixed circuit-breakers)
• discharge the closing or opening springs
• Visually inspect the lubrication conditions of the tulip
isolating contacts, of the sliding surfaces, ect.
• Check correct electrical and mechanical operation of the
various devices, with particular attention to the interlocks.
• The screws and nuts are tightened in the factory and
correct tightening is marked with a collared sign. No further
tightening operations are foreseen during the operating life
of the circuit-breaker.
functional test:
• Connect the power supply voltage.
• Carry out several no-load operations. This test particularly
applies to circuit-breakers which are rarely activated under
normal conditions.
note
These operations can only be carried out by Abb personnel
or suitably qualified and specially trained personnel.
