Sungrow SG125HX, User Manual

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4
2
Product Description
2.1 System Introduction
The inverter is a transformerless 3-phase PV grid-connected inverter. As 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 to
feed the AC current into the utility grid.
The intended usage of the inverter is illustrated in the following figure.
ffiig gu urre e 2 2--1 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.
IItte em m
D De essc crriip pttiio on n
N No otte e
A
PV strings
Monocrystalline silicon, polycrystalline silicon and thin-film
without grounding.
B Inverter SG125HX
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
medium voltage.
E
Utility grid
TN-C, TN-S, TN-C-S, TT, IT.
The following figure shows the common grid configurations.