Fronius IG Plus 35 - Connecting the Fronius IG Plus to the Public Grid (AC); Monitoring the Mains Network; Installations with Several Inverters; AC-Side Terminals

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Connecting the Fronius IG Plus to the Public
Grid (AC)
AC-side Termi-
nals
One-phase inverter
Three-phase inverter
Two-phase inverter
Legend:
L1 Phase conductor
L2 Phase conductor
L3 Phase conductor
PE PE conductor
N Neutral conductor
(a) Terminal for grounding rod
(b) Terminal for possible grounding
of the solar module frame
(c) ‘US Sense’ terminal (for USA)
max. cable cross section 25 mm²
Important The resistance in the leads to the AC side connection terminals
must be as low as possible for optimal functioning of mains network moni-
toring.
Monitoring the
Mains Net-
work
For large photovoltaic systems, several Fronius IG Plus units can be
connected in parallel.
To ensure symmetrical feeding, connect the inverters uniformly to all 3
phases.
Installations
with Several
Inverters
(a)(b) (c)
(a)(b) (c) (a)(b) (c)
NOTE Make sure that the network neutral conductor is grounded.