15
EN-US
Safety
(continued)
CAUTION!
Danger of damaging the Fronius String Control 250/
25 from improperly connected terminals. Improperly connected
terminals can cause thermal damage to the Fronius String
Control 250/25 and may cause a fire. When connecting all DC
‘IN’ and DC ‘OUT’ cables, make sure that all terminals are
tightened securely using the proper torque.
To ensure problem-free DC cable connections to the terminals, all DC
cables inside the Fronius String Control 250/25 must have a certain mini-
mum length.
Depending on which side the DC cables are inserted from into the Fronius
String Control 250/25, different minimum lengths of the DC cables are
needed.
For the minimum inside cable length of the Fronius String Control 250/25:
-
consider the guidelines in the following figure
-
consider the mandatory forming of a min. 4 in. wire loop
Necessary
Inside Cable
Length of the
Fronius String
Control 250/25
25.16 in.
639 mm
7.83 in.
199 mm
3.98 in.
3.90 in.
12.05 in.
306 mm
20.08 in.
306 mm
25.47 in.
647 mm
101 mm
99 mm
Summary of Contents for String Control 250/25
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