Photovoltaic Grid-Connected Inverters SG250K3

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1.  Structure of Photovoltaic Grid-Connected Inverters SG250K3 Description

SG630KTL is using low-frequency isolation transformer for protective purpose. Its wider input voltage range ensures more combinations of

the PV arrays. Moreover, optical fiber isolation technology has been adopted to increase its anti-interference ability under the circumstances

of multiple inverters installation. In addition, optimized circuit and structural design has improved system thermal efficiency which enhancing

system reliability and stability. Reinforced protection functions, including the DC ground fault protection, make it the best product for large

scale PV power plant.

 

 

2.  Main Features of the Photovoltaic Grid-Connected Inverters SG250K3

 

* Advanced Technology, Grid-friendly

LVRT, HVRT and zero-voltage ride through to cope with various grid conditions

SVG function at night, response to grid directives around the clock

Reactive power control with power factor from 0.9 lagging to 0.9 leading

* More Compact, Saving Space for PV Plant

Power density enhanced 50%, one of the central inverters with highest power density in the PV industry

Save installation spaces and lower the plant initial cost

Front maintenance, able to install against the wall, convenient installation and maintenance, saving operation cost of the PV plant.

* Efficient, More Yields

Max. efficiency at 97.3% with transformer

Efficient MPPT control strategy, improve power yields

28335 chips adopted, more accurate calculation, more power yields;

  Intelligent speed regulation cooling concept, low consumption, high efficiency

* More Advantages

Perfect protection and fault alarm system, safe and reliable

User-friendly dynamic graphics LCD

Redundant dual power supply solution improving the system reliability

Efficient PWM algorithm, low consumption of switch

Operate without power derating at -25 - +55

Reliable and continues operation in high altitude environment

Auxiliary heater (opt.)

CGC certification, compliance with BDEW

 

 

3.  Photovoltaic Grid-Connected Inverters SG250K3 Images

 

 

 

SG250K3 PV inverter

 

4.  Photovoltaic Grid-Connected Inverters SG250K3 Specification

MODEL 

SG250K3 

DC SIDE DATA

Max. DC Voltage 

1000Vdc 

Start Voltage

500V

MPP Voltage Range

480~850Vdc 

Min. DC Voltage

480V

Max. DC Power 

284kWp 

Max. Input Current 

592A 

AC SIDE DATA

Rated Output Power

250kW 

Max. AC Output Current

397A

Rated Grid Voltage

400Vac

Grid Voltage Range 

310~450Vac

Rated Grid Frequency

50Hz/60Hz

Grid Frequency Range

47~52Hz/57~62Hz

Output Current THD

<3% (at nominal power)

DC Current Injection

<0.5% of rated inverter output current

Power Factor

0.9(lagging)~0.9(leading)

SYSTEM 

Max. Efficiency 

97.3%(with transformer)

Euro Efficiency 

96.7%(with transformer)

Protection Degree

IP21

Power Consumption at Night

<80W

Operating Temperature

-25~+55°C

Cooling Method

Temperature controlled forced-air cooling

Relative Humidity

0~95%, non-condensing

Max. Working Altitude

6000m (operation with derating above 3000m)

DISPLAY AND COMMUNICATIONS

Display 

touch screen LCD

Standard Comm. Interfaces

RS485

Optional Comm. Interfaces

Ethernet

MECHANICAL DATA 

Dimensions(WxHxD)

1006x2034x850mm

Net Weight

1600kg 

 

 

 

5.  FAQ of Photovoltaic Grid-Connected Inverters SG250K3

Q1. What is the difference between inverter and solar inverter?

A1. Inverter only has AC inpput, but solar inverter both connect to AC input and solar panel, it saves more power.

 

 

Q2. What is the difference between MPPT&PWM?

A2. MPPT has higher efficiency, it can track the max power point and won't waste energy.

 

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