Safety instructions 13
6. Install temporary grounding as required by the local regulations. Connect the AC and
DC busbars (in both DC sections) to the PE with a temporary grounding tool.
Temporary grounding cables must be dimensioned to withstand the prospective
current of the system for time duration until upstream protection device clears the fault
current. The temporary grounding cables should be tied tightly to the busbars or the
frame of the converter as the forces of the short circuit current can cause the
temporary grounding cables to move hazardously.
7. Ask the person in control of the electrical installation work for a permit to work.
8. 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 tell the person responsible for work about the completed works. After
you make sure that the voltage can be connected, close all the doors of the inverter,
and close the disconnectors. 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.
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