
5
000981EG-F
Mutual connection of multiple inverters ................................................................................40
Notes on the system sizing...................................................................................................40
Operating diagram .................................................................................................. 41
Functionality and components of the equipment .................................................................42
Topographic diagram of the equipment ................................................................................45
Safety devices ......................................................................................................... 48
Anti-Islanding ........................................................................................................................48
Ground fault of the photovoltaic panels ................................................................................48
Other safety devices .............................................................................................................48
Lifting and transport ....................................................................................................... 49
General conditions ................................................................................................. 49
Transport and handling .......................................................................................................49
Lifting.....................................................................................................................................49
Unpacking and checking ......................................................................................................49
List of components supplied .................................................................................................50
Weight of the modules of the equipment..............................................................................51
Installation........................................................................................................................ 52
General conditions ................................................................................................. 52
Environmental checks...........................................................................................................53
Installations above 2000 metres...........................................................................................53
Recommendations for the wireless signal power.................................................................56
Installation position................................................................................................................57
Wall mounting ......................................................................................................... 58
Wireless antenna mounting ................................................................................... 59
Preliminary operations for connection of the PV generator............................... 61
Checking the correct polarity of the strings ..........................................................................61
Checking of leakage to ground of the photovoltaic generator..............................................61
Selection of differential protection downstream of the inverter ............................................61
Independent or parallel input channels configuration ........................................ 63
Channel configuration examples ..........................................................................................64
Independent channel configuration (default configuration) ..................................................65
Parallel channel configuration ..............................................................................................65
Input connection to PV generator (DC side) ........................................................ 66
Installation procedure for quick-fit connectors .....................................................................68
Distribution grid output connection (AC side)..................................................... 72
Characteristics and sizing of the line cable ..........................................................................72
Load protection switch (AC disconnect switch) ....................................................................73
Installation of the cable on the AC output connector ............................................................74
Connection for the AC output connector to the inverter .......................................................76
Installation of the external protective grounding cable .........................................................77
Communication and control signal connections to the UNO-DM-COM KIT board
(only for -X models or optional accessory) .......................................................... 78
Description of terminal blocks on the UNO-DM-COM KIT board (only for -X models or
optional accessory) ...............................................................................................................79
Description of terminal blocks on the UNO-DM-PLUS-COM Ethernet KIT board (only as
optional accessory) ...............................................................................................................80
Connection of the RS485 line...............................................................................................................81