ABB Terra 94 UL Operation And Installation Manual page 71

Maintenance and troubleshooting
7. Insulating barrier removal:
remove the insulating barrier on the bottom side of AC main switch.
8. Earthing and short circuiting incoming line assessment:
Is needed to make the earth and short-circuit connection on the main AC incoming line in presence of a site
configured as below:
MV distribution panel
MW Switch
MW / LV
Transformer
NOTE
Multiple chargers – AC lines in common cable conduit > 100m length – an AC line charged
9. Earthing and short circuiting (Only if necessary):
According to evaluation before, prepare the grounding kit and connect it from PE busbar (56) point to Main
AC terminals (59).
60
LV distribution panel
OPEN+LOTO
External LV
AC Switch
External LV
AC Switch
33 38
Cable conduit > 100 m
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