2
Criteria for the Proper Selection of String Fuses................................................................ 22
General ........................................................................................................................ 22
Criteria for the Proper Selection of String Fuses ........................................................... 22
Effects of Using Underrated Fuses ............................................................................... 22
Fuse Recommendations ............................................................................................... 22
Fuses ........................................................................................................................... 23
Application Example ..................................................................................................... 23
Inserting String Fuses ........................................................................................................ 24
Selecting String Fuses .................................................................................................. 24
Inserting String Fuses ................................................................................................... 24
Safety ........................................................................................................................... 24
Connecting Data Communication Cables to the Fronius String Control 250/25 .................. 25
Connection Options ...................................................................................................... 25
Additional Insulation for Data Communication Cables ................................................... 25
Configuration example .................................................................................................. 26
Safety ........................................................................................................................... 26
Connecting RJ 45 Data Communication Cables to the Fronius String Control 250/25 ... 27
Connecting Unterminated Multi-core Data Communication Cables to the Fronius String
Control 250/25 .............................................................................................................. 27
Terminal assignments ................................................................................................... 28
Connecting an External Power Supply ............................................................................... 29
General ........................................................................................................................ 29
Safety ........................................................................................................................... 29
Connecting an External Power Supply........................................................................... 29
Setting the Address........................................................................................................... 30
Safety ........................................................................................................................... 30
General ........................................................................................................................ 30
Setting the Address - Examples .................................................................................... 30
Installing the Protection Against Contact and Closing the Fronius String Control 250/25 .... 31
Safety ........................................................................................................................... 31
Installing Protection Against Contact ............................................................................. 31
Closing the Fronius String Control 250/25 ..................................................................... 31
Settings ............................................................................................................................ 32
General ........................................................................................................................ 32
Initial Steps ................................................................................................................... 32
Possible Settings for the Fronius String Control 250/25................................................. 32
Strings per Measuring Channel ..................................................................................... 33
Max. Energy Deviation .................................................................................................. 33
Threshold...................................................................................................................... 33
Display of Data and Status Messages............................................................................... 34
Data Display................................................................................................................. 34
Status Messages .......................................................................................................... 34
Replacing String Fuses ..................................................................................................... 35
Safety ........................................................................................................................... 35
Preparation .................................................................................................................. 35
Replacing String Fuses ................................................................................................. 35
Finally... ........................................................................................................................ 36
Technical Data .................................................................................................................. 37
Input data ...................................................................................................................... 37
Output data (to the inverter) ........................................................................................... 37
General Data ................................................................................................................ 38
Summary of Contents for String Control 250/25
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