SMA SC 500CP XT - Manual (Page 18)

3.3.1.2 AC Disconnection Unit
The AC disconnection unit disconnects the inverter from the MV transformer.
Figure 4: Switch positions of the AC disconnection unit from ABB
Position Designation Explanation
A Switch position on The AC disconnection unit is closed.
B Central switch position The AC disconnection unit was tripped and is open.
C Switch position off The AC disconnection unit is open.
3.3.1.3 DC Switchgear
The DC switchgear disconnects the inverter from the PV power plant.
Figure 5: Indicators on the DC load-break switch
Position Designation
A Spring status indicator
B Position indicator
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User Manual SCCPXT-BA-E4-en-54 18