Fronius Symo Hybrid 3.0, Installation Instructions Manual, Page: 15 / 40

AC terminals
PE Ground conductor / grounding
L1-L3 Phase conductor
N
Neutral conductor
Max. cross-section of each conductor
cable:
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.
In the case of an AC cable with a cross-section of 16 mm², ferrules can be either not
used or only used to a limited extent depending on the type of ferrule and crimping.
Type of AC cable The following types of AC cable can be connected to the AC terminals of the inverter:
- Copper or aluminium: solid round conductor
- Copper: fine-stranded round conductor, up to conductor class 4
Preparing the alu-
minium cables
for connection 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 reaction of alu-
minium with air, the following points must be considered when connecting aluminium
cables:
-
the reduced rated currents for aluminium cables
- the connection conditions listed below
Always follow the cable manufacturer instructions when using aluminium cables.
When designing cable cross-sections, take local regulations into account.
Connection conditions:
1
Carefully clean the oxide layer from the bare end of the cable by scraping it, e.g. with
a knife
IMPORTANT! Do not use brushes, files or emery paper, as the aluminium particles get
trapped and can be transferred to other conductors.
2
Once the oxide layer is removed, rub the end of the cable with a neutral grease,
such as non-acidic and non-alkaline Vaseline
3
Immediately connect the cable end to the terminal
IMPORTANT! Repeat the procedure if the cable has been disconnected and is to be re-
connected.
15
EN