Sungrow SG30CX, User Manual

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6
2
Product Description
2.1 System Introduction
The inverter is a transformerless 3-phase PV grid-connected inverter. As an integral compo-
nent in the PV power system, the inverter is designed to convert the direct current power
generated from the PV modules into grid-compatible AC current and to feed the AC current
into the utility grid.
The intended usage of the inverter is illustrated in the following figure.
figure 2-1 Inverter Application in PV Power System
The inverter must not be connected to a PV string that requires positive or negative
grounding.
Do not connect any local load between the inverter and the AC circuit breaker.
The inverter applies only to the scenarios described in this manual.
Item
Description
Note
A
PV strings
Monocrystalline silicon, polycrystalline silicon and thin-film
without grounding.
B Inverter
SG30CX, SG33CX, SG40CX, SG50CX, SG30CX-NI,
SG50CX-NI.
C
Grid connection
cabinet
Includes devices such as AC circuit breaker, SPD, metering
device.
D Transformer
Boost the low voltage from the inverter to grid-compatible me-
dium voltage.
E
Utility grid
TN-C, TN-S, TN-C-S, TT, IT.
The following figure shows the common grid configurations.