ABB Fimer PVS980-58-4348kVA-I, Commissioning And Maintenance Manual, Page: 12 / 58

10 Safety instructions
circuit current of the AC or DC supply. One temporary grounding device may not be
enough on the AC side. On the DC side, connect the grounding tool on the ball
terminals located in the DC section (see the Figure below). On the AC side, connect
the grounding tool on the ball terminals in the AC section (F271, see the
Figure below). If the prospective short circuit current is more than 40 kA, the internal
grounding option cannot be used, and the AC side grounding for work must be done
outside the inverter.
6. Protect any other energized parts in the work location against contact. Take special
precautions when you work near bare conductors.
7. Ask the person in charge of work for a permit to work.
After you finish the work, make sure that the inverter is clean from inside and that all the
tools have been removed from inside the inverter, remove the temporary grounding and
inform the person responsible that work is complete. After you make sure that the voltage
can be connected, close the doors of the inverter. When connecting voltage back on, do
not stand right next to the inverter. Also make sure that there is an escape route available
in case of an emergency.