Fronius IG Plus 100 V-1, Operating Instructions Manual

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Fronius IG Plus Installation ........................................................................................................................ 31
Attaching the wall bracket ..................................................................................................................... 31
Lifting the Fronius IG Plus..................................................................................................................... 31
Fronius IG Plus installation ................................................................................................................... 32
Connecting the Fronius IG Plus to the Public Grid (AC) ............................................................................ 34
Monitoring the Grid ............................................................................................................................... 34
Installations with Several Inverters ....................................................................................................... 34
AC-Side Terminals................................................................................................................................ 34
Grid Neutral Conductor ......................................................................................................................... 35
Connecting Aluminum Cables............................................................................................................... 35
Cross Section of AC Wires ................................................................................................................... 35
Safety.................................................................................................................................................... 35
Connecting the Fronius IG Plus to the public grid (AC) ........................................................................ 35
Maximum AC-side overcurrent protection............................................................................................. 36
Connecting Solar Module Strings to the Fronius IG Plus (DC) .................................................................. 37
General Information about Solar Modules ............................................................................................ 37
Safety.................................................................................................................................................... 37
DC-Side Terminals................................................................................................................................ 38
Connecting aluminum cables (DC) ....................................................................................................... 38
Polarity Reversal of Solar Module Strings ............................................................................................ 38
Overview ............................................................................................................................................... 39
Ungrounded System: Connecting Solar Module Strings............................................................................ 40
Wire Cross Section of Solar Module Strings......................................................................................... 40
Ungrounded system: Connecting solar module strings ........................................................................ 40
Selecting String Fuses .......................................................................................................................... 42
Inserting String Fuses ........................................................................................................................... 43
Criteria for the Proper Selection of String Fuses ....................................................................................... 44
General ................................................................................................................................................. 44
Criteria for the Proper Selection of String Fuses .................................................................................. 44
Effects of Using Underrated Fuses ....................................................................................................... 44
Fuse Recommendations ....................................................................................................................... 44
Application Example ............................................................................................................................. 44
Fuses .................................................................................................................................................... 45
Ungrounded System: Connecting Solar Module Strings with a Cable Cross Section > 16 mm² ............... 46
General ................................................................................................................................................. 46
Additional components required ........................................................................................................... 46
Ungrounded system: Connecting solar module strings with a cable cross section > 16 mm² .............. 46
Solar Module Ground at Negative Pole: Connecting Solar Module Strings ............................................... 50
General ................................................................................................................................................. 50
Wire Cross Section of Solar Module Strings......................................................................................... 50
Solar module ground at negative pole: Connecting solar module strings............................................. 50
Selecting String Fuses .......................................................................................................................... 52
Inserting String Fuses ........................................................................................................................... 53
Criteria for the Proper Selection of String Fuses ....................................................................................... 54
General ................................................................................................................................................. 54
Criteria for the Proper Selection of String Fuses .................................................................................. 54
Effects of Using Underrated Fuses ....................................................................................................... 54
Fuse Recommendations ....................................................................................................................... 54
Application Example ............................................................................................................................. 54
Fuses .................................................................................................................................................... 55
Solar Module Ground at Negative Pole: Connecting Solar Module Strings with a Cable Cross Section >
16 mm² .......................................................................................................................................................
56
General ................................................................................................................................................. 56
Additional components required ........................................................................................................... 56
Solar module ground at negative pole: Connecting solar module strings with a cable cross section >
16 mm²..................................................................................................................................................
56
Solar Module Ground at Negative Pole for Fronius IG Plus ...................................................................... 60