Additional Grounding Connection; Additional Grounding Requirements - Sungrow SG5KTL-MT User Manual

5 Electrical Connection
* The image shown here is for reference only. The actual product you receive may differ.
N N o o . . N N a a m m e e
DC input plug-in terminal
1
Communication accessory
2
port
AC cable gland
3
4 PE terminal
RS485 communication port
5
(optional)
Enough space should be kept for electrical connection at the bottom of the
inverter when choosing the installation site.

5.3 Additional Grounding Connection

Since the inverter is a transformerless inverter, neither the negative pole nor
•
the positive pole of the PV string can be grounded. Otherwise, the inverter
will not operate normally.
Connect the additional grounding terminal to the protective grounding point
•
before AC cable connection, PV cable connection, and communication cable
connection.
The ground connection of this additional grounding terminal cannot replace
•
the connection of the PE terminal of the AC cable. Make sure the two
terminals are both grounded reliably.

5.3.1 Additional Grounding Requirements

All non-current carrying metal parts and device enclosures in the PV power system
should be grounded, for example, brackets of PV modules and inverter enclosure.
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f f i i g g u u r r e e 5 5 - - 1 1 Terminal description
D D e e s s c c r r i i p p t t i i o o n n
MC4 terminals for PV input
Can be connected to GPRS, WiFi, or E-Net
communication module
AC terminals to the power grid
Additional grounding terminal
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User Manual