SMA SC 500CP-US-10 600V - Manual (Page 36)

3 Product Description SMA America, LLC
36 SCCP-US-BE-US_en-52 Operating Manual
If an insulation error has been detected, the Advanced Remote GFDI cannot be closed via the parameter RemMntSvc.
In this case, a qualified person needs to check and, if necessary, repair the insulation and then acknowledge the error.
Manual activation of the plant maintenance
Manual plant maintenance can be activated via the parameter RemMntSvc (see Section 10.1.2, page 76).
If the manual plant maintenance is activated, the inverter opens the Advanced Remote GFDI and the AC switching device.
The DC switching device remains closed. The inverter displays the warning 3517 ‒ Isolated mode, isolation
detection. After a waiting time of approximately 15 minutes has expired, the insulation monitoring is activated.
Manual plant maintenance can be ended via the parameter RemMntSvc (see Section 10.1.3, page 76).
Automatic plant maintenance
Depending on the configuration option, automatic plant maintenance is activated. In this case the inverter performs an
automatic insulation measurement in the morning before switching to feed-in operation.
If in the morning the voltage of the PV array exceeds the value set in the parameter PvVtgRisoStart, automatic plant
monitoring begins.
If the automatic plant maintenance is activated, the inverter opens the Advanced Remote GFDI. The AC switching device
is opened and remains open until completion of the plant maintenance. The DC switching device remains closed.
The inverter displays the warning 3517 ‒ Isolated mode, isolation detection. After a waiting time of approximately
15 minutes has expired, the insulation monitoring is activated.
If there is no insulation error present, the automatic plant maintenance can be interrupted via the key switch.
If the voltage of the PV array exceeds the sum of the values of PvVtgStrLevMin and PvVtgRisoDif, a waiting time of
approximately 15 minutes has elapsed and there are no insulation errors present, the inverter ends the automatic plant
maintenance and switches into feed-in operation.
Insulation monitoring
If the error message 3501 ‒ Insulation Failure is displayed, the insulation is defective. In this case, a qualified person
needs to check and, if necessary, repair the insulation and then acknowledge the error.
Once the error has been corrected, the plant maintenance can be ended via the parameter RemMntSvc
(see Section 10.1.3, page 76).
Type of insulation monitoring device used
The insulation monitoring device used is the A-ISOMETER iso-PV1685 device supplied by Bender GmbH & Co. KG.
Manually ending plant maintenance
The automatic resetting of the parameter RemMntSvc after a ground fault results in the loss of the UL listing.