Connecting Sequence For Single Dc Load Break Switch, 1,000 V - SMA Sunny Central 250U Installation Manual

SMA America, LLC
6.3.5 Connecting sequence for single DC load break switch,
1,000 V
Every DC load break switch disconnects 2 DC strings at the same time. Refer to the following
illustration for connecting the cable from the PV plant and from the inverter to the DC load break
switch, if the Disconnect Unit is located on the right side of the Sunny Central.
Figure 19: Overview DC load break switch, 1,000 V
Position Description
A DC connection ungrounded string 1 to inverter
B DC connection ungrounded string 1 to PV plant
C DC connection ungrounded string 2 to PV plant
D DC connection ungrounded string 2 to inverter
Installation Guide
6 Electrical connection
DisconACDC_SCUS-IUS103110 39