Fronius String Control 250/30 User Manual
Page 19

17
EN
Fitting metric screw joints to the Fronius String Con-
trol 250/30
General
-
Use the right number of metric screw joints for the available solar module strings. Fit
sealing glands into empty screw joints.
-
Insert the metric screw joints in the following order:
from bottom to top and from left to right.
-
Tighten the metric screw joints and blank screw joints with the tightening torque spec-
ified for their size.
Recommended
order in which to
insert the metric
screw joints
*
As an outlet for the grounding cable only if optional overvoltage protection is used
Fitting metric
screw joints to
the Fronius String
Control 250/30
(1)
Lock nut
(2)
Screw joint
(3)
Strain-relief device
M20
M40
M40
M20*
M25
M32
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
1
2