Fronius IG 15 - Manual (Page 60)

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As your FRONIUS IG unit need be connected to only one phase of the
mains network, in can be installed in almost any part of the house.
Warning! In order to ensure the best possible functioning of the
mains monitoring system, it is important to make sure that there is a
minimum of resistance in the feeding lines to the connection point.
The AC conductor resistance between the FRONIUS IG unit and the
house distribution panel must not exceed 0,5 Ohm.
Warning! Hazard due to supply voltage and DC-voltage from the
solar modules. Only licenced electricity installers are authorized to
open the connection area and only provided that it is not under
voltage.
Mains network
monitoring
For larger photovoltaic schemes it is possible to connect several FRONI-
US IG units in parallel without any problems.
In order to secure a symmetric feed-in of the power supply, the FRONIUS
IG units should be connected evenly to all 3 phases.
If you have any doubt you should approach your specialized dealer whe-
never there are technical problems.
Schemes with
more than one
inverter
Connection to the Solar Modules and to the Public
Mains
The following points are important for the most economic use of the FRO-
NIUS IG unit when choosing suitable solar modules:
- the no-load voltage increases when temperature decreases with insola-
tion remaining unchanged. Therefore the no-load voltage must not
exceed 500 V - or 530 V for the IG 60 HV.
Whenever the no-load voltage of the solar modules exceeds 500 V - or
530 V for the IG 60 HV - the FRONIUS IG unit will be destroyed, and all
warranty rights will become null and void.
- More exact data for dimensioning the solar modules for the location
chosen can be obtained using calculation schemes such as the FRONI-
US configurator (available on www.fronius.com).
Solar modules
Connection