Fronius IG Plus A 3.0-1 UNI User Manual

6
AC-side overcurrent protection ............................................................................................................. 40
Additional external AC and/or DC disconnect....................................................................................... 40
Connecting solar module strings to the inverter (DC) ................................................................................ 41
General information about solar modules ............................................................................................. 41
Safety.................................................................................................................................................... 41
DC terminals ......................................................................................................................................... 41
Polarity Reversal of Solar Module Strings ............................................................................................ 42
Overview ............................................................................................................................................... 42
Connecting Solar Module Strings .............................................................................................................. 43
Solar module ground............................................................................................................................. 43
Wire cross section of solar module strings ........................................................................................... 43
Connecting solar module strings........................................................................................................... 44
Inserting string fuses............................................................................................................................. 46
Connecting combined solar module strings using connecting distributors ................................................ 48
General ................................................................................................................................................. 48
Additional components required ........................................................................................................... 48
Solar module ground............................................................................................................................. 48
Safety.................................................................................................................................................... 49
Connecting combined solar module strings using connecting distributors ........................................... 49
Solar Module Ground at Positive Pole: Connecting Solar Module Strings ................................................ 52
General ................................................................................................................................................. 52
Solar module ground at positive pole.................................................................................................... 52
Wire cross section of solar module strings ........................................................................................... 52
Solar module ground at positive pole: Connecting solar module strings .............................................. 53
Inserting string fuses............................................................................................................................. 58
Solar module ground at positive pole: Connecting combined solar module strings using connecting dis-
tributors ......................................................................................................................................................
59
General ................................................................................................................................................. 59
Additional components required ........................................................................................................... 59
Solar module ground at positive pole.................................................................................................... 59
Safety.................................................................................................................................................... 60
Solar module ground at positive pole: Connecting combined solar module strings using connecting
distributors ............................................................................................................................................
60
Criteria for the Proper Selection of String Fuses ....................................................................................... 65
DC disconnect requirements................................................................................................................. 65
General ................................................................................................................................................. 65
Criteria for the proper selection of string fuses ..................................................................................... 65
Effects of Using Underrated Fuses ....................................................................................................... 65
Fuse Recommendations ....................................................................................................................... 65
Application example.............................................................................................................................. 66
Fuses .................................................................................................................................................... 66
Attaching power stage sets and closing the Inverter ................................................................................. 67
Preparation ........................................................................................................................................... 67
Attaching power stage sets and closing the Inverter ............................................................................ 67
Commissioning .......................................................................................................................................... 68
Factory pre-set configuration ................................................................................................................ 68
Requirements for start-up operation ..................................................................................................... 68
Commissioning ..................................................................................................................................... 68
Selecting the grid .................................................................................................................................. 69
Startup phase during startup operation................................................................................................. 71
Setting inverter for solar module ground at the positive pole................................................................ 73
Inserting Option Cards ............................................................................................................................... 75
Suitable option cards ............................................................................................................................ 75
Safety.................................................................................................................................................... 75
Opening the inverter ............................................................................................................................. 75
Inserting option cards into the inverter.................................................................................................. 76
Termination plug when networking several DATCOM components ..................................................... 76
Connecting option cards, laying data communication wires ................................................................. 77
Closing the inverter ............................................................................................................................... 78
Data Communication and Solar Net .......................................................................................................... 79
Solar Net and data interface ................................................................................................................. 79
Example ................................................................................................................................................ 79
Selecting the interface protocol and setting the inverter baud rate............................................................ 81
General ................................................................................................................................................. 81

Fronius IG Plus A 3.0-1 UNI Specifications

General

AC nominal output	3000 W
Max. apparent AC power	3000 VA
Max. output current	13 A
AC grid frequency	50 / 60 Hz
THD	<3%
Max. DC voltage	500 V
Number of MPP trackers	1
AC voltage range	183 V - 264 V
DC input voltage range	150 - 450 V
Cooling	Convection