Service information
418
NXAIR /
≤ 40 kA
110-0134.9 / 14
29.3 Visual inspection
The visual inspection is performed every year or at the operator's discretion.
General check for paint damages on all panels of a switchgear assembly in the area of the
front doors, the lateral and the rear termination. If required, repair damages.
General check of the switchgear for dust layers, especially of the ventilation units in the
pressure relief duct, as well as the fan box.
Clean dust layers on the units by using a customary vacuum cleaner without damaging the
metal grids (1) or ventilation slots (2).
Fig. 743: View from above onto a ventilation unit
in the pressure relief duct
Fig. 744: Exemplary view of a ventilated panel
with ventilation slots at the side and in
the high-voltage door
Clean dust layers or foreign objects in the fan box by using a customary vacuum cleaner
without damaging the metal grids (1).
Fig. 745: Exemplary view of a fan box with metal grid on the right and left in the front area of
the pressure relief duct
General check for humidity. To do this, open the high-voltage door of the switching-device
compartment of every third panel and check the switching-device compartment for humidity
or condensation.
1
2
