If the inverter displays “Ground Fault”, turn OFF the AC and DC to the inverter and refer to
the fault examples in this manual.
PV Ground
Figure 3-8 AC and PV Grounding
Connecting the Inverter to the Electrical Grid
Two circuit boards are located inside the inverter:
The Control Board (at the top of the inverter).
1.
The Power Distribution Board (at the bottom of the inverter) with the following
2.
terminals:
The AC connection terminal.
The DC connection terminal.
The internal Ground Fault Interrupt fuse.
WARNING:
Replace the GFI fuse with the same type and rating of
fuse. The inverter uses only Littelfuse KLKD001 1A/600V.
The inverter is connected to the electrical grid using 3 wires - LINE 1, LINE 2 and
GROUND.
NOTE:
To avoid an increase in AC voltage to unacceptable values while the
inverter is exporting power, the grid impedance value at the connection
point should be as low as possible. By keeping the grid impedance
value low, the inverter will achieve higher system efficiency and avoid
nuisance shutdowns.
The total impedance of the grid plus the
interconnecting AC wires should be less than 1.25 Ohm.
12
WARNING
Replace the GFI fuse with the same type and rating of fuse. The inverter uses only
Littelfuse KLKD001 1A/600V.
!
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