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Installation and Operation Manual for Inverter RPI M50A_12s V1 EU EN 2017-03-09
6 Installation
6.6 Connecting to the grid (AC)
The inverter can be connected to 3-phase grids
without neutral conductors (3P3W, 3 phases +
PE) and 3-phase grids with neutral conductors
(3P4W, 3 phases + N + PE).
► If makes no difference which individual
wire of the AC cable is connected to which
contact.
► If the inverter is connected to a grid without
a neutral conductor, the AC connection must
be changed via the display to 3P3W after
commissioning, see “8.4.9 AC connection”,
page 102.
Connecting to a 3-phase grid with a neutral conductor
(3P3W)
L1
L2
PE
L3
Connecting to a 3-phase grid without a neutral conductor
(3P4W)
L1
L2
PE
N
L3
1. Pull all necessary parts of the AC plug over the cable. The
parts required depend on the cable diameter, see figure on
the following page.
Variant Cable diameter Seal Torque (nut, 4) Gap X
A 30.8 ... 44.7 mm D1 6.5 ... 20.0 Nm 1 ... 7.5 mm
B 26.8 ... 35.4 mm D1 + D2 11.0 ... 17.0 Nm 1 ... 6 mm
C 21.9 ... 27.6 mm D1 + D2 + D3 13.0 ... 14.0 Nm 1 ... 3.5 mm
(with 38 mm
2
wire cross-
section)
D1 + D2 + D3 12 Nm 3.5 mm
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