Sungrow SG8K3-D - Grounding the Inverter

5 Electrical Connection User Manual
28
* Image shown here is for reference only. The actual product you receive may
differ.
Tab. 5-1 Terminal Descriptions
Item
Terminal
Description
1 PV terminals
MC4 terminals for PV inputs.
-S series: one pair of PV terminals.
-D series: three pairs for SG8K3-D and two pairs
for the other –D inverter types.
2 RS485 terminal
Can be connected to Wi-Fi communication
module.
3
Meter | DRM
terminal
Left connector is intended for energy meter, right
connector is reserved.
4
Second PE terminal
For reliable grounding.
5
AC terminal
For connection to the utility grid.
5.2 Grounding the Inverter
All non-current carrying exposed metal parts of the equipment and other
enclosures in the PV power system should be grounded, e.g. PV strings frame
and inverter enclosure.
A second Protective Earth (PE) terminal is equipped at the bottom of the
inverter. Be sure to connect this PE terminal for reliable grounding and ensure
that the grounding resistance is less than 10 Ohm.
Correct grounding connection of the second PE terminal and the AC
terminal is mandatory. Not properly connecting both PE will void any or
all product warranty.
Item
Description
A
Screw (M4×10 mm)
B
Spring washer
C
Washer
D
Cable socket
E
Grounding cable
Fig. 5-3 Second PE Connection