Fronius String Control 250/25 Operating Instructions Manual page 49

Table of contents
General .............................................................................................................................. 3
Device Concept ............................................................................................................. 3
Functional Principle ....................................................................................................... 3
Inverter ........................................................................................................................... 3
Other System Requirements.......................................................................................... 4
Intended Use ................................................................................................................. 4
Scope of Supply ............................................................................................................. 4
Optional ......................................................................................................................... 4
Technical Data ............................................................................................................... 4
Abbreviations and Descriptions Used ............................................................................ 5
Warning Notices on the Device ..................................................................................... 5
Product Description ............................................................................................................ 7
Safety............................................................................................................................. 7
Fronius String Control 250/25 Device Description ......................................................... 7
Fronius String Control 250/25 Installation .......................................................................... 9
Dowels and Screws ....................................................................................................... 9
Installation Position ........................................................................................................ 9
Selecting a Location ...................................................................................................... 9
Fronius String Control 250/25 Installation ...................................................................... 9
Installing Metric Screw Joints on the Fronius String Control 250/25 ................................. 11
General ......................................................................................................................... 11
Recommended Sequence for Inserting the Metric Screw Joints .................................. 11
Preparation ................................................................................................................... 11
Installing Metric Screw Joints on the Fronius String Control 250/25 ............................ 12
Tightening Torque for Metric Screw Joints ................................................................... 12
Connecting Solar Module Strings to the Fronius String Control 250/25 ........................... 13
Safety........................................................................................................................... 13
Notes for Connecting Solar Module Strings to the Fronius String Control 250/25 ....... 13
Connecting Solar Module Strings to the Fronius String Control 250/25 ....................... 14
Connecting the Fronius String Control 250/25 to the Inverter .......................................... 16
Safety........................................................................................................................... 16
Preparation .................................................................................................................. 16
Connecting the Fronius String Control 250/25 to the Inverter ...................................... 17
Criteria for the Proper Selection of String Fuses .............................................................. 18
General ........................................................................................................................ 18
Criteria for the Proper Selection of String Fuses ......................................................... 18
Effects of Using Underrated Fuses .............................................................................. 18
Fuse Recommendations - Application Example .......................................................... 18
Application Example .................................................................................................... 19
Fuses ........................................................................................................................... 19
Inserting String Fuses ...................................................................................................... 20
Safety........................................................................................................................... 20
Selecting String Fuses ................................................................................................. 20
Inserting String Fuses .................................................................................................. 20
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