Fronius IG-TL 3.0, Operating Instructions Manual

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33
Recommenda-
tion for the AC-
side overcurrent
protection
NOTE!
- Make sure that the grid neutral conductor is grounded. For IT networks (iso-
lated networks without grounding), this is not the case, and operation of the
inverter is not possible.
- To use the inverter, a neutral conductor connector is required.
The infeed of the inverter can be adversely affected by a neutral conductor
with small dimensions. Therefore, the neutral conductor must have the same
dimensions as the other current-bearing conductors.
Inverter Number of
phases Max. output Fuse protection
Fronius IG TL 3.0 1 3130 W 1 x C 25 A
Fronius IG TL 3.6 1 3760 W 1 x C 25 A
Fronius IG TL 4.0 1 4190 W 1 x C 32 A
Fronius IG TL 4.6 1 4820 W 1 x C 32 A
Fronius IG TL 5.0 1 5250 W 1 x C 32 A
NOTE! The inverter is equipped with an RCMU according to DIN VDE 0126-1-1.
It monitors residual currents from the solar module up to the inverter grid connec-
tion and disconnects the inverter from the grid when an improper residual current
is detected.
If an external residual current circuit breaker is required due to local regulations,
it must have a rated current of at least 100 mA.
In this case, a type B residual current circuit breaker can be used.
If more than one inverter is used, a rated current of 100 mA per connected inverter
must be provided; for example, for two inverters connected to a common residual
current circuit breaker, a residual current circuit breaker with at least 200 mA must
be used.