7 Installation
Grounding the inverter housing
60
Installation and operation manual M70A_260 Flex RPI703M26000 EU V1.1 EN 2022-08-02
7.4
Grounding the inverter housing
WARNING
High current
►
Always observe the local regulations relating
to grounding cable requirements.
►
To increase the safety of the system, always
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 the
solar modules.
►
The grounding cable cross-section must be
at least 6 mm
2
.
The inverter housing can be grounded at 2
points:
●
External, bottom left at the grounding screw
●
Internal, on the PE screw of the AC connec-
tion
7.4.1 Grounding via the grounding screw
1. Screw the grounding cable onto the left side of the inverter
base (torque: 3.9 Nm). This requires an M6 screw, spring
washer and washer. A toothed washer is
not
required.
2. Perform a continuity check of the grounding connection.
→ If there is not a sufficiently conductive connection,
clean the contact surface on the grounding screw or
use a toothed washer if necessary.
