14
UX-series Inverters
5.
Electrical installation
DANGER! This inverter will be connected to a high voltage DC power generator and AC grid. The
installation must be performed by qualified personnel and in compliance with national and local
standards and regulations
5.1
Grounding
DANGER! Never connect or disconnect the connectors under load.
NOTICE! The AC connection to the electrical distribution grid must be performed only after
receiving authorization from the utility that operates the grid.
NOTICE! Make sure to set the correct grid standard as part of system commissioning, see
chapeter 6.6.
There are two options for ground protection: through grid terminal connection and external heat sink
connection.
If AC terminal is used to connect ground, please refer to the contents of 5.3.2.
If the heat sink is used to connect the ground, please follow the steps below.
1)
Prepare the grounding cable: recommended to use the 16-35mm² outdoor copper-core cable.
2)
Prepare OT terminals M6
IMPORTANT! For multiple inverters in parallel, all inverters should be connected to the same
ground point to eliminate the possibility of a voltage potential existing between inverters
grounds.
WARNING! No matter what kind of grounding connection is adopted, it is strictly forbidden to
connect the ground of the inverter with the lightning protection of the building, otherwise
Autarco will not be responsible for any damage caused by lightning.
