Fronius IG Plus A 3.0-1 UNI User Manual

59
EN-US
Solar module ground at positive pole: Connecting
combined solar module strings using connecting
distributors
General The following steps are necessary when the solar module manufacturer requires a solar
module ground at the positive pole.
If several solar module strings are combined outside of the inverter into one solar module
string, the current of the solar module string can be higher than the current permitted for a
DC terminal (20 A).
In this case, you have the option of connecting the DC cables to the inverter using a con-
necting distributor.
Additional com-
ponents required
The following components are required for connecting DC cables via a connecting distrib-
utor:
- 2 connecting distributors
(standard at Fronius IG Plus
10.0-1/10.0-3/11.4-1/11.4-3/12.0-3
or
available from Fronius as an option)
- Cable lugs
Select the cable lugs according to the
available DC cables
- Hexagon screws
- Hexagon nuts
that fit the cable lugs
Solar module
ground at posi-
tive pole
Solar module ground at positive pole with fuse:
Option
=
~
=
~
DC+
DC-
Inverter
L1
N
GND
Solar module
DC main switch
GFDI fuse
String fuse
L2
L3

Fronius IG Plus A 3.0-1 UNI Specifications

General

AC nominal output	3000 W
Max. apparent AC power	3000 VA
Max. output current	13 A
AC grid frequency	50 / 60 Hz
THD	<3%
Max. DC voltage	500 V
Number of MPP trackers	1
AC voltage range	183 V - 264 V
DC input voltage range	150 - 450 V
Cooling	Convection