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Opening the shutter
139-2021.9 / 07
DANGER
Electric shock
If the busbars in the busbar compartment / the cable or bar connections in the
connection compartment have not been isolated, the contacts are live at
operational high voltage.
Always observe the Five Safety Rules.
Before opening a shutter:
Isolate and earth the busbars / cable or bar connections.
Verify safe isolation from supply.
If one of the shutters is open, close it before opening the other.
Make sure that the mechanism of the shutter not to be opened is secured
with a padlock.
Open the shutter safely:
Open the shutter strictly as described in chapter 18 "Operating the
shutters" and observe all safety instructions therein.
While a shutter is open:
Do not reach into or enter the switching-device compartment.
Do not insert any objects in the switching-device compartment other than
the earthing rod.
Always close a shutter:
Before interrupting operations inside the switching-device compartment.
Immediately after completing operations inside the switching-device
compartment.
NXAIR M
Fitting the earthing device
197
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