Fronius IG-TL 3.6 - Connecting Solar Module Strings to the Fronius IG TL (DC)

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If string fuses are used instead of metal bolts, reverse polarity in an individual solar module
string can cause damage to the inverter and may cause an inverter fire.
Connecting Solar
Module Strings to
the Fronius IG TL
(DC)
CAUTION! Risk of damage and fire to inverter due to reverse polarity of solar
module strings when using string fuses.
Reverse polarity of solar module strings can lead to an unacceptable overload to
a string fuse being used. This can cause a strong arc, which can lead to an invert-
er fire.
When using string fuses, always make sure that the polarity is correct before con-
necting the individual solar module strings.
NOTE! You should only remove the number of knockouts required for the avail-
able cables (e.g., 3 openings for 3 DC cables).
1
1
1
2
4
3
2
NOTE! Finely stranded cables up to conductor class 5 can be connected to the
DC-side terminals without wire end ferrules.
12 mm
3
1
6
5
4
3
2
DC-
DC+
4