3 Installation
String PV Grid-tied Inverter PSiO-W3#1100VPVK Series
(100000-125000)
User Manual
40
Two external grounding terminals are reserved at the bottom of the inverter, at least one of them should
be connected.
In order to improve the anti-corrosion performance of the grounding terminal, it is recommended to
paint anti-rust paint on the outside of the grounding terminal for protection after installation.
The grounding of the inverter and the lightning rod of the building that inverter installed cannot
be the same, the two need to be separated (as shown inFigure3-28), or, lightning stroke will
damage the inverter.
The grounding of the inverter should be directly connected to the grounding system, and the
impedance should be less than 20m
Ω
.
Figure3-28
Grounding diagram of inverter
----End
3.6.4 AC Output Wiring
Before connecting to the grid, first make sure that the grid voltage and frequency meet the
requirements of the inverter. For details, please see A Technical Specifications. Otherwise, please
contact the electricity company to solve.
Each inverter should be equipped with an independent external three-pole breaker on the AC side to
ensure that the inverter is safely disconnected from the grid. Recommended breaker's rated voltage is
400V, rated current is 250A.
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