Delta SOLIVIA 5.0 Installation Manual Page 15

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EN
15Operation and installation manual SOLIVIA 5.0 AP G3 TR
7.6 Grid connection
The grid (AC output) is connected over a Wieland RST25i3S AC connector. You can
nd the correct allocation on the screw-type terminal connection of the connector. The
solar inverter must be connected to the grid over a three-core line (L, N, PE). The con-
nected AC line must be switched potential-free before the disconnection or the insertion
of the AC connector.
The connection to the Wieland AC connector must be made with a exible line and a
conductor cross section of 4.0 mm².
An automatic circuit breaker is to be provided in the line L upstream of every device,
with a nominal current of 32 A and tripping characteristic type B or C (please refer to
your local country installation requirements and regulations for correct tripping char-
acteristic type). In addition, attention is to be paid to the selectivity of the fuse unit
attached upstream of the automatic circuit breaker.
The solar inverter must be grounded via the AC connector’s PE conductor. To do this,
connect the PE conductor to the designated terminal. If you wish to integrate more than
one inverter into the installation, please proceed as illustrated in the drawings in the
appendix.
Please note the cable length and the cable cross-section, due to the risk of undesirable
temperature rise and power losses.
The AC connector is protected from unintentional disconnection by a clip mechanism
which can be released with a screwdriver.
7.7 Connection of PV modules
Before the photovoltaic system is connected, the polarity of the PV voltage at the Multi-
Contact connectors must be checked to ensure that it is correct.
The connection of the PV module is implemented using Multi-Contact MC4 connectors,
where the DC negative pole is located on the connector upper row and the DC positive
pole on the connector lower row. The connectors are coded to prevent you from acci-
dentally plugging them into the wrong terminal.
Please ensure the following at all times:
That there is never any risk of anyone coming into contact with the solar inverter
connectionterminals, due to the risk of dangerous voltages across them.
That under no circumstances are the PV modules to be disconnected from the
solar inverter under load. If a disconnection should be necessary, rst switch the
grid off so that the solar inverter cannot absorb any further power. Next, open the
upstream DC disconnector.
The maximum input voltage of the solar inverter is 540 V. The maximum current load of
each individual Multi-Contact MC4 connector is 18 A.
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