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Earthing - Siemens 3AK Operating Instructions Manual

Vacuum circuit-breaker module.
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Fig. 42
Removal of the M10 nut with washer
Fig. 44
Earth terminal
9229 9923 176 0B


If the 3AK vacuum circuit-breaker module is installed into an earthed metal frame
and is connected permanently and electrically conductive, no separate earthing
is required.
Place serrated washers under the screw heads when fastening the vacuum cir-
cuit-breaker module in this case.
Fig. 43
Removal of the transport bracket
Connect the vacuum circuit-breaker module under the
cartridge insert (90.) on the earth terminal (70.) the high-
voltage protective earth as specified (DIN EN 50341).
For this, connection to earth on the system must be
present in the form of a clamp. If the vacuum circuit-
breaker module is moved into the system, the clamp
must positively lock onto the bolt.


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