Fronius String Control 250/30 - Manual (Page 5)

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EN
Contents
Safety rules ................................................................................................................................................ 5
Explanation of safety symbols .............................................................................................................. 5
General ................................................................................................................................................. 5
Proper use ............................................................................................................................................ 6
Environmental conditions...................................................................................................................... 6
Qualified service engineers................................................................................................................... 6
Safety measures at the installation location.......................................................................................... 6
EMC Device Classifications .................................................................................................................. 7
EMC measures ..................................................................................................................................... 7
Electrical installations............................................................................................................................ 7
Protective measures against ESD ........................................................................................................ 7
Safety measures in normal operation ................................................................................................... 7
Safety symbol ....................................................................................................................................... 7
Disposal ................................................................................................................................................ 8
Data protection...................................................................................................................................... 8
Copyright............................................................................................................................................... 8
General ...................................................................................................................................................... 9
Device concept ..................................................................................................................................... 9
Functional principle ............................................................................................................................... 9
Inverter.................................................................................................................................................. 9
Other system requirements................................................................................................................... 9
Proper use ............................................................................................................................................ 9
Scope of supply .................................................................................................................................... 10
Option ................................................................................................................................................... 10
Terms and abbreviations used.............................................................................................................. 10
Warning notices on the device.............................................................................................................. 11
Description of the device............................................................................................................................ 12
Safety.................................................................................................................................................... 12
Description of the device: housing ........................................................................................................ 12
Description of the device: inside the device.......................................................................................... 13
Installing the Fronius String Control 250/30............................................................................................... 15
Selecting wall plugs and screws ........................................................................................................... 15
Installation position ............................................................................................................................... 15
Selecting a location............................................................................................................................... 15
Installing the Fronius String Control 250/30.......................................................................................... 15
Fitting metric screw joints to the Fronius String Control 250/30................................................................. 17
General ................................................................................................................................................. 17
Recommended order in which to insert the metric screw joints............................................................ 17
Fitting metric screw joints to the Fronius String Control 250/30............................................................ 17
Tightening torques for metric screw joints ............................................................................................ 18
Connecting the Fronius String Control 250/30 to the inverter.................................................................... 19
Safety.................................................................................................................................................... 19
Connecting aluminium cables ............................................................................................................... 19
Preparation ........................................................................................................................................... 19
Connection with V-type terminal lug ..................................................................................................... 20
Connection with cable lug ..................................................................................................................... 20
Connecting the Fronius String Control 250/30 to the inverter............................................................... 20
Connecting solar module strings to the Fronius String Control 250/30...................................................... 21
Safety.................................................................................................................................................... 21
Notes on connecting the solar module strings to the Fronius String Control 250/30 ........................... 21
Pin assignment for grounded solar modules......................................................................................... 22
Example of pin assignment for grounded solar modules ...................................................................... 22
Connecting solar module strings to the Fronius String Control 250/30 ................................................ 22
Criteria for selecting the right string fuses.................................................................................................. 23
General ................................................................................................................................................. 23
Criteria for selecting the right string fuses............................................................................................. 23
Effects of using underrated fuses ......................................................................................................... 23
Fuse recommendations ........................................................................................................................ 23
Application example.............................................................................................................................. 23
Fuses .................................................................................................................................................... 24