Connecting alu-
minium cables
The DC-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
IMPORTANT! Always follow the cable manufacturer instructions when using alu-
minium cables.
IMPORTANT! 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.
Solar module
strings - check-
ing the polarity
and voltage
CAUTION!
Danger due to incorrect polarity and voltage.
This may result in damage to the inverter.
▶
Check the polarity and voltage of the solar module strings before making the
connection. The voltage must not exceed the following values:
▶
Fronius Symo:
▶
When installed between 0 and 2000 m above sea level: 1000 V
▶
When installed between 2001 and 2500 m above sea level: 950 V
▶
When installed between 2501 and 3000 m above sea level: 900 V
▶
When installed between 3001 and 3400 m above sea level: 850 V
▶
the Fronius Symo must not be installed at an altitude exceeding 3400 m
above sea level
▶
Fronius Eco:
▶
When installed between 0 and 2000 m above sea level: 1000 V
▶
When installed between 2001 and 2500 m above sea level: 950 V
▶
the Fronius Eco must not be installed at an altitude exceeding 2500 m above
sea level
29
EN
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