Sungrow SG3KTL-EC User Manual page 58

5 Electrical Connection
6. Insert the six-pole plug into the DI connection socket according to markings
shown below.
7. Fasten the Thread-Lock Sealing Nut to the inverter.
Before fasten the lid, please make sure:
 Whether it's necessary to apply glue on the cut;
 The rubber strip is fully filled with air.
8. Fasten the lid and the top cap to the inverter.
9. Connect the ripple control receiver to the inverter according to the terminal
assignment.
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User Manual