Fronius String Control 250/25, Operating Instructions Manual

1

EN-US

Contents

General ............................................................................................................................... 3

Functional Principle ........................................................................................................ 3
Other System Requirements ........................................................................................... 3
Device Concept .............................................................................................................. 3
FCC Compliance ........................................................................................................... 4
Standards and Regulations ............................................................................................. 4
Intended Use .................................................................................................................. 4
Abbreviations and Descriptions Used ............................................................................. 4
Product listings and compliance ..................................................................................... 4
Components Supplied .................................................................................................... 4

Product Description ............................................................................................................ 5

Safety ............................................................................................................................. 5
Fronius String Control 250/25 - Housing.......................................................................... 5
Fronius String Control 250/25 - Connection Area ............................................................ 6
Selecting a Location ....................................................................................................... 8

Fronius String Control 250/25 Installation............................................................................. 8

Wall anchors and Screws ................................................................................................ 8
Recommended Screws for Mounting .............................................................................. 8
Installation Position ......................................................................................................... 8
Safety ............................................................................................................................. 8
Drilling Pattern ................................................................................................................ 9
Attaching the Fronius String Control 250/25 to a Concrete or Brick Wall .......................... 9
Attaching the Fronius String Control 250/25 to a Wooden Wall ...................................... 10
Attaching the Fronius String Control 250/25  to a Metal Carrier ..................................... 10

Knocking out Cable Input Openings and Mounting Conduits on the Fronius String Control
250/25 ............................................................................................................................... 11

General ......................................................................................................................... 11
Cable Input Areas .......................................................................................................... 11
Maximum Conduit Size ................................................................................................. 12
Recommendation for Inserting Cables .......................................................................... 12
Preparation .................................................................................................................. 12
Knocking out Cabel Input Openings on the Fonius String Control 250/25 ....................... 13
Mounting Conduits on the Fronius String Control  250/25 .............................................. 13

Connecting Solar Module Strings to the Fronius String Control 250/25 .............................. 14

General Information About Solar Modules ..................................................................... 14
Safety ........................................................................................................................... 14
Necessary Inside Cable Length of the Fronius String Control 250/25............................. 15
Notes for Connecting Solar Module Strings to the Fronius String Control 250/25 ........... 16
Terminal Assignment with Grounded Solar Modules ...................................................... 16
Connecting Solar Module Strings to the Fronius String Control 250/25 .......................... 17

Connecting the Fronius String Control 250/25 to the Inverter .............................................. 18

Safety ........................................................................................................................... 18
Cable Lugs for DC Cable ‘OUT’ ................................................................................... 19
Preparation .................................................................................................................. 19
Connecting DC Cable ‘OUT’ to the Fronius String Control 250/25 ................................. 20
Connecting the Fronius String Control 250/25 to the Inverter .......................................... 20