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864-5091.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • Revision 06
Servicing
44
Maintenance
44.1
Switchgear maintenance
Under normal operating conditions the fixed-mounted circuit-breaker switchgear 8DB10 and
the 3AH49 circuit-breaker are maintenance-free. We recommend to inspect the switchgear
according to the following maintenance recommendation. To prevent any danger during
maintenance, please observe the following safety instructions.
Inspection/testing of the secondary equipment such as the capacitive voltage detecting
system is done within the scope of national standards and customer-specific regulations.
44.2
Safety instructions
DANGER
High voltage! Danger! Do always observe the Five Safety Rules:
➭ Isolate the switchgear.
➭ Secure against reclosing.
➭ Verify safe isolation from supply.
➭ Earth and short-circuit.
➭ Cover or barrier adjacent live parts.
DANGER
High voltage! Danger! Touching live parts will cause death or serious injuries.
➭ Switchgear maintenance may only be performed by qualified personnel who is familiar
with the danger involved.
44.3
Maintenance recommendation
The switchgear should be inspected at the following intervals:
Visual check
every 5 years
Status inspection
every 10 years
Maintenance
after 10000 operating cycles of the circuit-breaker,
see page 205, "Maintenance of the vacuum circuit-breaker operating mechanism"
These intervals are guidelines which have to be adjusted to the different operating conditions
(e.g. dusty environment, frequent condensation, etc.). The maintenance actions with the associated test and
maintenance operations are shown in the following table.
Servicing
203/214
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