Sungrow SG33CX - Product Introduction; Intended Usage

4
2 Product Introduction
2.1 Intended Usage
SG33CX, SG40CX, SG50CX, a transformerless three-phase PV
grid-connected inverter, is an integral component 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 feeds the AC current to the
utility grid. The intended usage of the inverter is illustrated in Fig. 2-1.
A B C D
E
Fig. 2-1 Inverter application in PV power system
Inverter cannot connect the PV strings whose positive and negative
terminals need to be grounded.
Do not connect any local load between the inverter and the AC circuit
breaker.
Item
Description
Note
A
PV strings
Monocrystalline silicon, polycrystalline silicon and
thin-film without grounding.
B
Inverter
SG33CX, SG40CX, SG50CX.
C
Grid
connection
cabinet
Includes devices such as AC circuit breaker, SPD,
metering device.
D
Transformer
Boost the low voltage from inverter to grid-compatible
medium voltage
E
Utility grid
TN-C, TN-S, TN-C-S, TT, IT