Appendix C: Connecting the AC and DC Strings
to the DC Safety Unit
Some inverter models are supplied with an integrated DC Safety Unit. This appendix
describes how to connect the AC grid and DC strings to the DC Safety Unit.
The DC Safety Unit includes:
Mechanical DC switch (2-pole disconnection)
DC surge protection (SPD, Type II)
DC fuses (plus & minus; optional)
This appendix describes connections to DC Safety Unit with or without fuses. The
following figure illustrates the DC Safety Unit supplied with fuses.
Figure 30: Inside the DC Safety Unit with fuses
Three Phase System MAN-01-00507-4.2
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Appendix C: Connecting the AC and DC Strings to the DC Safety Unit
