Delta M50A-260 - Grounding the Inverter Housing; Grounding Via the Grounding Screw

7 Installation
Grounding the inverter housing
58
Installation and Operation Manual M50A_260 RPI503M260000 Product version L and M EU V1.3 EN 2023-08-14
7.5 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
7.5.1 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 su󰀩ciently conductive connection,
clean the contact surface on the grounding screw or
use a toothed washer if necessary.