Delta SOLIVIA 2.5 EU G3, Operation And Installation Manua

Page: 12 / 392

10 Operation and installation manual SOLIVIA 2.5 EU G3
6.5 Ambient temperature
The solar inverter can be operated in an ambient temperature between -25°C to +70°C.
The following diagram illustrates how the power supplied by the solar inverter is reduced automa-
tically in accordance with ambient temperature.
The device should be installed in a well-ventilated, cool and dry location.
6.6 Grid connection
The grid (AC output) is connected over a Wieland RST25i3S AC connector. You can find the cor-
rect 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 connected 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 flexible line and a conductor
cross section of min. 2.5 mm² to max. 4.0 mm².
An automatic circuit breaker is to be provided in the line L upstream of every device, with a nominal
current of 16 A and tripping characteristic type B. 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.
6.7 Connection of PV modules
Before the photovoltaic system is connected, the polarity of the PV voltage at the Tyco connectors
must be checked to ensure that it is correct.
The connection of the PV module is implemented using Tyco Solarlok 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 accidentally 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 connection
terminals, 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, first 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 indi-
vidual Tyco connector is 18 A.