Sungrow SG10RT, Руководство пользователя

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24
table 5-3 Cable Requirements
No. Cable
Type
Cable Diameter
Wire Conductor
Cross-section
1 DC cable
Outdoor multi-core
copper wire cable
complying with
1100 V and 30 A
standard
6 mm–9 mm 4 mm 2 –6 mm 2
2 Ethernet
cable
CAT 5E outdoor
shielded network
cable
5.3 mm–7 mm 8 * 0.2 mm
2
3 Meter
RS485 cable
(1)
Shielded twisted
pair
5.3 mm–7 mm
2 * (0.5–1.0) mm 2
4
AC cable (2)
Outdoor 5-core
copper wire cable
SG3.0RT to
SG12RT ： 10 mm–
21 mm
SG3.0RT to
SG12RT ： 4 mm 2 –6
mm 2
SG15RT to
SG20RT ： 14 mm–
25 mm
SG15RT to
SG20RT ： 6 mm 2 –10
mm 2
5
Additional
Grounding
cable
Outdoor single-core
copper wire cable
The same as that of the PE wire in the AC
cable
(1) The cable requirements for COM2 terminal connection are the same.
(2) All the AC wires should be equipped with correctly colored cables for distinguishing.
Please refer to related standards about the wiring color.
5.4 External Grounding Connection
• Since the inverter is transformerless, neither the negative pole nor the positive
pole of the PV string can be grounded. Otherwise, the inverter will not operate
normally.
• Connect the external grounding terminal to the protective grounding point be-
fore AC cable connection, PV cable connection, and communication cable
connection.
• The ground connection of this external grounding terminal cannot replace the
connection of the PE terminal of the AC cable. Make sure those terminals are
both grounded reliably. Otherwise, SUNGROW shall not be held liable for any
damage caused by the violation.
5 Electrical Connection User Manual