30
REFUsol 48K-UL
REFU Elektronik GmbH
Fig. 13: DC connection Phoenix Contact TW50 (picture shows the plus connection closed and the minus open)
Before connecting the PV strings an isolation measurement must be taken.
Whenever it is switched on, the inverter automatically checks the insulation of the PV generator. If the
isolation resistance measurement is below the acceptable threshold, the inverter does not start and the
can only be started once the PV generator isolation
error has been removed.
Be absolutely sure to verify proper polarity when connecting the PV strings. Any inappropriate connection
of individual strings may damage the PV generator.
The solar inverter is protected against reverse polarity connection by an integrated diode.
The PV generator may not exceed the following operational characteristics under any circumstances!
Device type
REFUsol 48K-UL
Max. DC voltage at each input
1000 V
Max. short-circuit current DC input
160 A
Max. DC operating current
84 A
NOTICE
Failure to observe this can lead to damage to the inverter and therefore void the
warranty.
