Connecting the inverter to the public grid (AC
side)
Safety
WARNING!
Danger due to incorrect operation and incorrectly performed work.
This may result in serious injury and damage to property.
▶
Only qualified staff are authorised to commission your inverter and only
within the scope of the respective technical regulations.
▶
Read the Installation and Operating Instructions before installing and com-
missioning the equipment.
WARNING!
Danger due to grid voltage and DC voltage from solar modules that are exposed
to light.
This may result in an electric shock.
▶
Ensure that both the AC side and the DC side of the inverter are de-ener-
gised before carrying out any connection work.
▶
Only an authorised electrical engineer is permitted to connect this equip-
ment to the public grid.
CAUTION!
Danger due to incorrectly tightened terminals.
This may result in heat damage to the inverter, which may lead to fire.
▶
When connecting AC and DC cables, ensure that all the terminals are
tightened to the specified torque.
Monitoring the
grid
To provide the best possible grid monitoring, the resistance in the leads to the
AC-side terminals should be as low as possible.
Type of AC cable The following types of AC cable can be connected to the AC terminals of the in-
verter:
-
Copper or aluminium: solid round conductor
-
Copper: fine-stranded round conductor, up to conductor
class 4
Preparing the
aluminium
cables for con-
nection
The AC-side terminals are suitable for connecting single-wire, round aluminium
cables. Because of the formation of a non-conductive oxide layer due to the re-
action of aluminium with air, the following points must be considered when con-
necting aluminium cables:
-
the reduced rated currents for aluminium cables
-
the connection conditions listed below
Always follow the cable manufacturer instructions when using aluminium cables.
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