Sungrow SG33CX User Manual

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

Sungrow SG33CX Specifications

General

Model	SG33CX
Manufacturer	Sungrow
Rated Power	33 kW
Max DC Voltage	1100 V
Max Efficiency	98.7%
Start Voltage	200 V
Total Harmonic Distortion	< 3%
Power Factor at Rated Power	1
DC Connection Type	MC4
Allowable Relative Humidity Range	0 - 100%
Operating Altitude	4000 m
MPPT Voltage Range	200 V - 1000 V
AC Voltage Range	310 V - 480 V
Rated Grid Frequency	50 Hz / 60 Hz
Adjustable Power Factor Range	0.8 leading to 0.8 lagging
Operating Ambient Temperature Range	-25 °C ... +60 °C
Communication	RS485