Delta Electronics RPI M6A Installation And Operation Manual page 68

6 Installation
Connecting to the grid (AC)
68
8. Plug the AC plug into the AC connection on the inverter
and tighten.
9. Fasten the AC cable with a strain relief element.
10. If the inverter is connected to a grid without a neutral
conductor, the AC connection type must be changed using
the display to 3P3W after commissioning, see "8.4.9 AC
connection", page 99.
Installation and Operation Manual for Power Inverter RPI M6A M8A M10A EU V4 EN 2020-07-13