SMA SUNNY MINI CENTRAL 4600A Installation Manual page 40

Electrical Connection
• Off
The SMA Power Balancer is deactivated (default setting).
– In the event of a device fault or line voltage fault at an inverter, only this inverter is
disconnected from the power distribution grid and the other two inverters continue to run at
an undiminished power level.
• PowerGuard
This setting can be selected if the entire PV plant only consists of three 3 Sunny Mini Central
inverters and in the event of a malfunction, the unbalanced load should be limited to 4.6 kVA
over a 10‑minute average.
Deviating unbalanced load limit for Italy
The unbalanced load for inverters set to the Italian national standard DK 5940 is limited
to 6 kVA over a 10‑minute average.
– If 1 of the 3 inverters indicates a line voltage fault or device fault and stops feeding in,
the other 2 inverters automatically limit their power to 4.6 kVA over a 10-minute average.
40 SMC46-60A-IA-IEN120471
SMA Solar Technology AG
Installation Manual