Sungrow SG250HX-US, Руководство пользователя

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figure 5-2 Aluminium cable terminal connection sequence
1. Copper to Aluminium adapter terminal 2. Flange nut 3. Aluminium cable
Ensure that the selected terminal can directly contact with the copper bar. If there
are any problems, contact the terminal manufacturer.
Ensure that the copper bar is not in direct contact with the aluminum wire. Other-
wise, electrochemical corrosion may occur, impairing the reliability of electrical
connection.
5.5 External Grounding Connection
Electric shock!
• Make sure that the ground cable is connected reliably. Otherwise, it may cause
electric shock.
• Since the inverter is not equipped with a transformer, neither the negative elec-
trode nor the positive electrode of the PV string can be grounded. Otherwise,
the inverter will not operate normally.
• Connect the grounding terminal to the protective grounding point before AC
cable connection, PV string connection, and communication cable connection.
• It is recommended that both the external grounding terminal and the AC side
grounding terminal be grounded reliably. A single grounding connection is also
acceptable if it is enough to meet the requirements of local standards and re-
lated safety regulations. Otherwise, SUNGROW shall not be held liable for any
damage caused by the violation.
5 Electrical Connection User Manual