Fronius Symo 10-20 kW - Manual (Page 11)

9
EN
Notes regarding grid connection
Monitoring the
Grid
AC terminals
PE Ground conductor / grounding
L1-L3 Phase conductor
N
Neutral conductor
Max. cross-section of each conductor ca-
ble:
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.
Type of AC cable The following types of AC cable can be connected to the AC terminals of the inverter:
Connecting alu-
minum cables The AC-side terminals are designed for connecting single-wire, round, aluminum cables.
The following points must be taken into account when connecting aluminum cables due to
the non-conducting oxide layer of aluminum:
-
Reduced rated currents for aluminum cables
- The connection requirements listed below
Connection Requirements:
Carefully clean off the oxide layer of the stripped end of the cable, e.g., using a knife.
IMPORTANTDo not use brushes, files or sandpaper. Aluminum particles may get stuck
and can transfer to other cables.
After removing the oxide layer of the cable end, rub in a neutral grease, e.g., acid- and
alkali-free Vaseline.
Then immediately connect it to the terminal.
Repeat the steps above whenever the cable is disconnected and then reconnected.
IMPORTANT! The resistance in the leads to the AC-side connection terminals must be as
low as possible for optimal functioning of grid monitoring.
AC
PE PE PE PE N
M32
L1 L1 L3 L3 L2 L2
- copper or aluminium: round, single wire
- Copper: round, finely stranded up to conductor category 4
Cu / Al Cu
max. Class 4
NOTE! Take into account local specifications when configuring cable cross sec-
tions.
1
2
3