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The ground connection between the PV generator connection and PE busbar have to be secured
with a high performance DC-breaker (max. 3.8A!)!
The auxiliary contact of the grounding pole reports a grounding defect.
If a ground fault occurs in the non-grounded pole of the PV generator, a leakage current flows from
the fault location (ground fault in the PV array) via the DC grounding automatic circuit breaker. The
automatic circuit breaker triggers in relation to the transfer resistances and the radiation in
accordance with its triggering characteristics.
Should the circuit breaker disconect the REFU
SOL
®
100K will shut down automatically. The display
shows the following message "ENS error".
A ground leak cannot be successfully detected through the DC grounding circuit breaker. There is
the possibility that during operation via power-sharing through the DC cable from the grounded
pole and earth nevertheless be released.
WARNING
The insulation condition of the PV generator is tested at regular
maintenance intervals!
An insulation failure has to be rectified immediately and the circuit-
breaker turned back on!
Permanent opening of the ground connection may damage the PV
modules!
WARNING
If PV systems are grounded, personnel protection measures must be
taken!
Work on the device may only be carried out after safety disconnecting
of all poles on the AC and DC sides!
Detailed information can be found under
www.lsis.biz
