3 Installation
String PV Grid-tied Inverter PSiO-W3#1100VPVK Series
(100000-125000)
User Manual
38
Since the inverter is with no transformer, it is required that the positive and negative poles of the
PV string cannot be grounded, otherwise the inverter will not operate normally.
Before the AC side, PV string and communication connection, please connect the external
grounding wire first.
The grounding connection of the external grounding terminal cannot replace the connection of
the internal grounding terminal. Make sure that both of them are grounded reliably, otherwise
Company will not in charge of the responsibility for possible consequences.
Step 1
Strip the insulation layer of the grounding wire by crimping tool, and press it into the corresponding
terminal, as shown in Figure3-26.
Figure3-26
Grounding wire stripping diagram
It is recommended to use DT or OT terminal for the external grounding wire.
Step 2
Connect the crimped grounding wire to the external grounding terminal at the bottom of the inverter,
as shown in Figure3-27.
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