Earthing The Busbar System Manually - Siemens NXAIR Operating Instructions Manual

Earthing and de-earthing the busbar system
21.2 De-earthing the busbar system manually
Arrangement of control elements
The operating mechanism of the earthing switch provided for earthing the busbar system is located in the
front upper area of the low-voltage compartment.
Fig. 510: Control elements of earthing switch
278
for busbar system
WARNING
Risk of falling
Falling from a ladder can lead to injuries and bone fractures.
Observe the guidelines for the use of working materials.
Use approved electrician's ladders only.
Observe the manual and the instructions on the ladder.
NOTICE
Maloperation
A switching operation once started must be completed totally! A switching
operation that was not completed cannot be turned back.
Do not try to remove the operating lever at intermediate positions.
NOTICE
Maloperation
If the operating lever is not inserted correctly, the busbar earthing switch may be
damaged.
Insert the operating lever in the actuating opening as far as it will go.
NXAIR / ≤ 40 kA
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