28 REFUsol 40K / 46K-MV REFU Elektronik GmbH
To avoid these disadvantageous conditions, twisted lines should be used for power supply if possible. If
laying of twisted lines is not possible, the following requirements must be met for single cores:
• Lay single cores next to each other.
• It is not allowed to lay single cores in closed, magnetically conducting materials (e.g., sheet steel
pipe).
• If laid in open cable ducts, single cores should be laid such that the spacings between them are as
small as possible.
Pos: 42 /Inverter M anuals/Insta llation/DC-Ansc hluss PV -Generator/842 @ 3\mod _1478695695240 _641.docx @ 25452 @ 2 @ 1
4.12
DC Connection of the Solar Generator
DANGER
Danger to life due to high voltages from active PV strings
Before connecting the PV strings, connect the inverter to the power supply
and additional ground connection.
The connection of the PV strings must always be carried out de-energized.
The inverter has a single DC input for connecting the solar generator. The module strings must be combined
in a separate DC string combiner box.
The DC terminals can be used with aluminum and copper wires. Please also check the installation instruction
of Phoenix Contact.
Note:
To avoid unnecessary loss of energy yield, the sum total of the resistive and
inductive voltage drop on the power supply line at nominal load should not
exceed 1 % of the line voltage.
Minimum spacing
between single cores!
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