28 REFUsol 08K ... 23K REFU Elektronik GmbH
NOTICE
Reverse currents are fault currents that occur in PV systems comprising parallel
strings. Given short circuits of individual modules or cells in a module, the open
circuit voltage of the string in question can drop so far that the intact parallel strings
will drive a reverse current through the defective string. This may result in
significant heating and therefore to destruction of the string.
What is more, the reverse current may cause secondary damage.
As no separation of the strings takes place within the inverter, each string must be
separately protected by a
string fuse connected in series with the other string fuses.
In the event of a failure, this isolates the string from the intact strings so that
destruction is prevented.
4.13.1
DC-Connection
Please note the following information (plug type, cross section) regarding the DC power cable:
Designation
Type
Art. No.
PHOENIX
CONTACT
Art. No.
Outer
Diameter
Cable Cross
Section
Connectors +
1774687
922006
5 – 8 mm 4 – 6 mm²
Connectors -
1774674 5 – 8 mm 4 – 6 mm²
PV-C PROTECTION CAP 1785430 922007
If necessary, the following photovoltaic Y distributors may be used:
Type Art. No. PHOENIX CONTACT
PV-YC 6/ 1-0,12-SO3 (-/++) 1787726
PV-YC 6/ 1-0,12-SO3 (+/--) 1787739
For the adjustment of MC4 to Sunclix use the following adapter cable:
Type Art. No. Art No. PHOENIX CONTACT
PV-AS-MC4/6-150-MN-SET 922008 1704982
NOTICE
In order to ensure IP65 protection, plug connectors and power supply connection
cables must be matched to each other and all unused connectors shall be fitted with
blanking plugs.
Only the original components by PHOENIX CONTACT can be used!
Failure to do so could void your warranty!
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