Earthing and de-earthing the busbar system
276 NXAIR / ≤ 40 kA 110-0134.9 / 14
Insert the operating lever in the actuating opening for the busbar earthing switch in such a
way that the pins of the operating lever coincide with the actuating opening in "10 past 8"
position.
Fig. 504: Inserting the operating lever for closing
Insert the operating lever in the actuating opening as far as it will go.
Hold the operating lever with one hand straight in the actuating opening and turn the
operating lever with the other hand clockwise as far as it will go (that is approx. 115°) until
the busbar earthing switch changes to CLOSED position.
Fig. 505: Closing the busbar earthing switch
Fig. 506: Closing the busbar earthing switch
using an electrician's ladder
While turning the operating lever, the position indicator of the busbar earthing switch
changes from the OPEN position to the intermediate position.
,
Fig. 507: Position indicator in intermediate position
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