Preventive Maintenance - Siemens NXAIR Operating Instructions Manual

If there is humidity or condensation inside a switching-device compartment, determine the
cause thereof. To do this, do also observe the climatic conditions of the switchgear room,
and arrange for suitable measures such as room ventilation or room heating.
General check for partial discharge noises. If there are any partial discharge noises,
determine the cause thereof and take adequate countermeasures.
Check whether the accessories are complete.

29.4 Preventive maintenance

110-0134.9 / 14
DANGER
Electric shock
Before any maintenance work is performed within primary compartments, it is to
make certain that the respective panel or panels are completely de-energized,
tagged or locked out and released for work in an authorized manner.
Disable remote control and automatic schemes.
De-energize all direct and back-feed power and control sources.
Disconnect all voltage and control power transformers.
Verify safe isolation from supply.
Earth the feeder in the respective panel or panels.
DANGER
Danger due to foreign objects
Serious switchgear damage and malfunctioning due to flashovers caused by
foreign objects.
Remove all foreign objects from the switchgear, e.g. tools, cleaning cloths
or lubricants.
NOTICE
Damage due to removal of greasing
Some parts and surfaces of the switchgear are greased for functioning.
Do not remove the grease from greased parts and surfaces.
Do not clean greased parts and surfaces.
If greased areas are dirty.
Clean the dirty area and grease again according these maintenance
instructions.
NXAIR / ≤ 40 kA
Service information
419