Studer Innotec SA
next3
Technical user manual V1.3 © Studer-Innotec SA 91
8.3 AC-SOURCE
8.3.1
General information
The next3 is a hybrid inverter charger, that can work in a stand-alone (offgrid) mode or
connected to an external AC source, being a grid or a generator.
The next3 has a connection named “AC-Source” where the main AC source is connected:
the grid or a generator.
This input:
• is limited to 80Aac and is designed for 3 phases system 400Vac with neutral.
• has a high security level with double security relays for disconnection according to VDE-AR-
N 4105, EN 50549-1, IEC/EN 62109-1 and other standards. In case of connection to a
distribution grid, always connect the grid to AC-Source. The proper opening of the relay is
checked with measurements.
• is unique in a system. Only one AC-Source is physically connected in a system even with
multiple next3 devices.
• The maximum accepted voltages at the input are by default (for grid connection, VDE
values):
o 125% of nominal voltage for 10ms (for fault ride thought: 230*1.25=287.5V
o 120% for 5 second: 230*1.2=276V
o 115% for 60sec means: 230*1.15=264V
8.3.2
AC-source Information
The detailed information about the grid is available by clicking
on the AC-source picture of the synoptic screen (see screens
map for an overview of navigation).
There are dedicated screens for AC-source information (see the screen map). On
the L1-L2-L3 screen, the sum of all phases is displayed as well as the composed
voltage (phase to phase).
The scale for the max power is given with the current given by the maximal power introduced
during the wizard process.
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