Delta SOLIVIA 2.5 AP G3 TR, Operation And Installation Manual

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8 Operation and installation manual SOLIVIA 2.5 AP G3 TR
The fact that the modules are connected in strings also means that the photovoltaic
system can be perfectly matched to the solar inverter’s input voltage range.
5.1 Data evaluation and communication
The integrated data display, processing and communication of the device enables
easy operation of the solar inverter. Monitoring of the operational status and signaling
of operational failures are capable of being called up over the device display. The data
interface enables the downloading of data which can be evaluated with a PC system
and guarantees continuous recording of operating data.
The best way of accessing this functionality is via the available accessories; compre-
hensive and seamless solar inverter monitoring is ensured.
The data read-out over the integrated interface and the display is possible only in solar
operation.
5.2 Technical structure of the solar inverter
A galvanical isolation of the solar inverter from the grid is achieved through a DC/AC
converter with an integrated high-frequency transformer. The photovoltaic voltage is
adjusted so that the maximum power output of the PV modules is also achieved with
varying solar irradiation levels and temperatures (MPP-Tracking).
The MPP range of the solar inverter is between 150 V and 450 V. This facilitates the
use of PV modules by a variety of manufacturers. Measures must be taken to ensure
that the maximum open-circuit voltage of 540 VDC is never exceeded. Please note that
the maximum open-circuit voltage will occur at the lowest temperatures anticipated. You
will find more detailed information about temperature dependency in the data sheet of
the PV modules. The device’s power consumption is kept to a minimum.
The high-quality aluminum casing corresponds to protection class IP65 (water-jet-proof
and dust-proof) and is protected against weathering processes by surface refinement.
The cooling characteristic profile is designed so that operation of the inverter is possible
with ambient temperatures from -25°C to +70°C.
A cooling characteristic profile is used for the removal of the power dissipation caused
through the voltage conversion. An internal temperature control protects the device
against excessive temperatures in the interior of the solar inverter. In case of high ambi-
ent temperatures, the maximum transferable power is limited.
The solar inverter is controlled by microcontrollers, which also implement interface com-
munication and the monitoring of values and messages on the display.
Two independent and redundant microcontrollers control the monitoring of the grid,
which is consistent with the feed-in directives of your local utility company. This enables
an installation of the solar inverter in the in-house electrical grid.
Operator protection requirements are met by electrically isolating the grid from the
PV module. The electrical isolation between the grid and the PV module is equivalent
to basic insulation. Maximum operator protection is ensured by reinforced isolation