Connecting Solar Module Strings To The Fronius String Control 250/25 Dcd Df; Safety - Fronius String Control 250/25 DCD DF Instructions De Service

Connecting Solar Module Strings to the Fronius
String Control 250/25 DCD DF

Safety

Notes for
Connecting
Solar Module
Strings to the
Fronius String
Control 250/25
DCD DF
WARNING! An electrical shock can be fatal. Danger from DC
voltage from solar modules.
- Make sure that the input and output sides in front of the
device are not charged before connecting anything.
- Any and all connections should only be carried out by quali-
fied electricians.
- Follow the safety rules in these operating instructions.
NOTE You should only connect DC cables with the same polarity
to the terminals with fuse holders for the 'IN' DC cable (according
to the label on the inside of the device).
NOTE To ensure problem-free DC cable connections to the
terminals, please note the following min. lengths for the DC
cables (measured from the inside bottom edge of the Fronius
String Control 250/25 DCD DF):
Terminals for DC+ cable 'IN'
Terminal 1: 180 mm
Terminal 25: 650 mm
Terminals for DC- cable 'IN'
Terminal 1: 180 mm
Terminal 25: 650 mm
NOTE When connecting all 25 possible solar module strings, we
recommend inserting and connecting the DC cables in groups of
5 to the Fronius String Control 250/25 DCD DF because of the
size of the space.
Follow this sequence when inserting and connecting DC cables:
from bottom to top and from inside to outside.
NOTE When connecting fewer than 25 solar module strings, we
recommend assigning an equal number of DC cables to the
measuring channels as much as possible.
For example: When connecting 15 solar module strings, connect
3 DC cables per measuring channel. If possible, leave individual
terminals free between the DC cables.
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