Fronius 10.0-3 208-240, Installation Instructions Manual

Page: 27 / 68

Copper (Cu)/aluminum (Al) 480 V
A
C
AWG 10/AWG 10
Preparing Alu-
minum Cables for
Connection The AC-side terminals are designed for connecting single-wire, round aluminum cables.
Due to the reaction of aluminum with air that creates a tough, non-conductive oxide layer
the following points must be considered when connecting aluminum cables:
-
Reduced rated currents for aluminum cables
- The connection requirements listed below
Always follow the instructions of the cable manufacturer when using aluminum cables.
Take into account local specifications when configuring cable cross sections.
Connection Requirements:
1
Carefully clean off the oxide layer of the stripped end of the cable, e.g., using a knife
IMPORTANT! Do not use brushes, files, or sandpaper; aluminum particles may get stuck
and can transfer to other cables.
2
After removing the oxide layer of the cable end, rub in a neutral grease, e.g., acid-
free and alkali-free Vaseline
3
Then immediately connect it to the terminal
IMPORTANT! Repeat the steps above whenever the cable is disconnected and then
reconnected.
Monitoring the
grid The resistance in the leads to the AC-side connection terminals must be as low as pos-
sible for optimal functioning of grid monitoring.
Connecting the
Inverter to the
Public Grid (AC)
NOTE!
To ensure a proper ground connection, all grounding terminals GND must be
tightened with the specified torque during installation.
NOTE!
Form loops of at least 4 in. (102 mm) in the AC cables when connecting them to
the AC terminals.
IMPORTANT! The ground conductor GND of the AC cable must be laid so that it is dis-
connected last.
Measure the ground conductor GND longer, for example, and loop.
27
EN-US