Electrical Connection Announcements - KEHUA TECH SPI-B Series User Manual

SPI-B Series (30K-60K) String PV Grid-tied Inverter
User Manual
1. The cables in this table are based on UL copper wire. If other wires are used, please replace them
according to the standard. The wire materials selected by our company have passed the national
standard certification or UL certification. Refer to Table3-2 for the recommended cross-sectional
area of the wire when the user purchases the wire by himself (the wire is about 5 meters long). If
the wire length exceeds 5 meters, the cross-sectional area of the wire should be increased
accordingly.
2. If the recommended terminal model is not adopted, please confirm with our company.
3. If using the aluminum wire, it should adopt copper-aluminum transition terminal.

3.5.1 Electrical Connection Announcements

When perform the electrical connection for inverter, it should follow the below procedures:
Step 1 Before perform the electrical connection, ensure the grounding terminal of inverter has been
connected with the ground, as shown in Figure3-10.
Figure3-10 Grounding
As shown in Figure3-11, the grounding of inverter mustn't connect with the grounding of the lighting
rod of the building where the inverter installed. It should separate them. The grounding of inverter
should connect with the grounding system directly and the impedance should be less than 20mΩ.
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