MAINTENANCE
28
6.3
Current collector maintenance
In case of damage to the conductor rails, the associated components such as current collectors must be in-
spected for damage.
Carbon brush
The carbon brush must not fall below the defined wear limit. The current collector must be replaced once the
wear limit has been reached. For wear limits of the carbon brushes see 5.2.7 Installing current collector.
Carbon brush springs
The contact pressure of the carbon brush springs must not fall below the values in the following table. Measure
the force required to push in the carbon brushes. If the contact pressure is no longer sufficient, the entire cur-
rent collector unit must be replaced.
Interval
Service/monitoring tasks
Personnel
Daily
•
Check safety equipment and operating
behavior of the system.
Operator
Monthly
Mechanical checks
•
Check the mobility of the carbon brush-
es and the spring return. Inspectionsfor
mechanical damage of any type.
Checking the electrical system
•
Check for wear of carbon brushes, tight
fit of all contact screws and cable at-
tachments.
•
Clean oxidized contact screws and ca-
ble ends and restore the protection of
these locations.
•
Carbon brushes should be replaced in
good time so that the mounts of the car-
bon brushes do not grind on the contact
surface, or the outer edges of the cover
plate touch the conductor rail.
•
Inspection of the wear limit on the car-
bon brush.
Technician/elec-
trician
Carbon brush
Minimum force, approx. [N]
ONST10
3
ONST50
5
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