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AC terminals
IMPORTANT! When using ferrules for AC cables with a cross-section of 16 mm², the fer-
rules must be crimped with a right-angled cross-section.
The use of ferrules with insulating collars is only permitted up to a max. cable cross-section
of 10 mm².
Cross-section of
When using a standard M32 metric screw joint with reducer:
the AC cable
cable diameter 7 - 15 mm
When using an M32 metric screw joint (reducer removed):
cable diameter 11 - 21 mm
(with a cable diameter of 11 mm the strain-relief force is reduced from 100 N to a maximum
of 80 N)
With cable diameters greater than 21 mm, the M32 screw joint must be replaced by an M32
screw joint with a larger clamping area - item number: 42,0407,0780 - strain-relief M32x15
KB 18-25.
Connecting the
inverter to the
public grid (AC)
IMPORTANT! The PE ground conductor of the AC cable must be laid in such a way that it
is the last to be disconnected in the event that the strain-relief device should fail.
This can be ensured, for example, by making it somewhat longer and by laying it in a loop.
14
AC
PE
PE
PE
PE
L1
L1
M32
NOTE! Form loops with the AC cables when connecting them to the AC termi-
nals!
When securing the AC cables using a metric screw joint, ensure that the loops do
not protrude beyond the connection area. Under certain circumstances it may oth-
erwise no longer be possible to close the inverter.
NOTE!
-
Ensure that the grid neutral conductor is grounded. In the case of IT networks
(insulated networks with no grounding) this may not be the case; it will then
not be possible to use the inverter.
-
In order to use the inverter, the neutral conductor must be connected.
A neutral conductor that is too small may adversely affect the grid power feed
operation of the inverter. The neutral conductor must therefore be the same
size as the other live conductors.
PE
L1-L3 Phase conductor
N
L2
L2
L3
L3
N
Max. cross-section of each conductor cab-
le:
16 mm²
Min. cross-section of each conductor cable:
in accordance with the fuse rating on the
AC side, but at least 2.5 mm²
The AC cables can be connected to the AC
terminals without ferrules.
Ground conductor / grounding
Neutral conductor
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