Connecting Aluminium Cables; Solar Module Strings - Checking The Polarity And Voltage - Fronius Symo Series Installation Instructions Manual

Connecting alu- The DC-side terminals are suitable for connecting single-wire, round aluminium cables.
minium cables Because of the formation of a non-conductive oxide layer due to the reaction of alumini-
um with air, the following points must be considered when connecting aluminium cables:
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Note! Always follow the cable manufacturer instructions when using aluminium cables.
Note! When designing cable cross-sections, take local regulations into account.
Connection conditions:
1
IMPORTANT! Do not use brushes, files or emery paper, as the aluminium particles get
trapped and can be transferred to other conductors.
2
3
IMPORTANT! Repeat the procedure if the cable has been disconnected and is to be re-
connected.
Solar module
strings - check-
ing the polarity
Danger due to incorrect polarity and voltage.
and voltage
This may result in damage to the inverter.
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the reduced rated currents for aluminium cables
the connection conditions listed below
Carefully clean the oxide layer from the bare end of the cable by scraping it, e.g. with
a knife
Once the oxide layer is removed, rub the end of the cable with a neutral grease,
such as non-acidic and non-alkaline Vaseline
Immediately connect the cable end to the terminal
CAUTION!
Check the polarity and voltage of the solar module strings before making the con-
nection. 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