5 Planning the installation
Planning the grid connection (AC)
Installation and Operation Manual M125HV EU V3 EN 2021-07-12
38
5.4.6 Grounding the inverter
WARNING
High current
►
Always observe the local regulations relating
to grounding cable requirements.
►
To increase the safety of the system,
always use the grounding screw to ground
the inverter housing even when this is not
required by the local regulations.
►
Always ground the inverter housing
before
connecting the inverter to the grid and solar
modules.
►
The grounding cable cross-section must be
at least 6 mm
2
.
If the grounding system contains a PE/PEN conductor (TN-C,
TN-S, TN-C-S) and it is included in the AC power cable, use the
PE screw of the AC connection provided for the purpose. In addi-
tion, the inverter housing must always be grounded via one of the
external grounding screws to protect people.
For an IT-type grounding system, the inverter housing must be
connected to ground either via the PE screw of the AC connec-
tion or via one of the external grounding screws.
Fig. 5.12: Grounding screws on the right foot of the inverter
Fig. 5.13: PE screw inside the inverter
