Converter switch type three-phase load imbalance regulating device-Fornitore globale

The three-phase load imbalance automatic adjustment device system is suitable for all low-voltage distribution networks in residential areas, industrial and mining areas, enterprises, and new rural transformation.

This system has a particularly significant effect on load adjustment in residential areas. The reason is that there are many single-phase loads in residential areas, and it is difficult to accurately calculate the actual load rate. The three-phase loads are constantly changing dynamically, and manual switching is obviously impossible. Unbalanced three-phase loads may occur at any time. Unbalanced three-phase loads will inevitably lead to increased losses, decreased electrical efficiency, increased zero sequence current, shortened equipment service life, and in severe cases, may cause power equipment to malfunction or even burn out.

Practice has proven that installing this system can control the imbalance of three-phase loads within a set range, thereby reducing unnecessary losses, improving energy utilization efficiency, and improving low voltage in the power grid. It brings certain economic benefits to power companies and customers, and also contributes to social energy conservation and emission reduction.

Function and characteristic

The system host and extensions are manufactured using advanced SMT production technology

The system adopts a specialized approximation optimization algorithm to intelligently select and control the phase of operation of each unit

Utilizing wireless data transmission technology operating in nationally recognized wireless frequency bands, utilizing multi frequency hopping technology for networking and communication, ensuring accurate, reliable, and low-power data transmission.

Each unit of the system adopts dedicated high-power magnetic holding relays to form switch components, and the system itself operates with low energy consumption.

Specifications and main technical parameters

Rated voltage:~ 220V

Maximum Load Carrying Current:~ 120A

Maximum switchable capability:~ 120A

Action lifespan:

Mechanical lifespan>106 cycles, electrical lifespan:>105 cycles

Switching power off time: ≤ 10ms

Rated frequency: 50Hz

Accuracy level: Voltage, current 0.5S level

Power consumption: Voltage circuit: During normal operation: ≤ 1W/1.5VA, when executing the switch command: ≤ 10W

Current circuit power consumption ≤ 1VA

Environmental conditions: Standard operating temperature is -25 ℃ to+55 ℃

Extreme working temperature:- 40℃～+70℃

Relative humidity: ≤ 95%

Communication transmission range: the entire distribution substation area

Data retention validity period: 10 years

System working principle and structure

This system is applied to the low-voltage side (220/380V) of distribution transformers. By collecting load data from the installed distribution transformers, it automatically calculates the load imbalance and displays it on the host LCD screen; When the real-time imbalance of the distribution transformer load exceeds the set value, the system host optimizes and selects some units in the system according to the approximation algorithm, and controls the selected units to switch to the appropriate phase through wireless signals, so that the low-voltage side load of the distribution transformer is basically kept in a balanced state, thereby reducing line losses, transformer losses, extending transformer service life, and improving power supply quality.

The system schematic diagram is as follows:

Transportation and Storage

1) The transportation and unpacking of this machine should not be subjected to severe impact, and should be transported and stored in accordance with the provisions of GB/T15464-1995 (General Technical Conditions for Packaging of Instruments and Meters).

2) If there are obvious signs of damage to the casing caused by severe impact or falling from a high altitude during the handling, retrieval, and installation process, please do not power up the machine and contact the supplier as soon as possible.

3) The machine should be stored in its original packaging at an ambient temperature of -40 ℃ to+70 ℃, with an average relative humidity of no more than 95% and no corrosive gases in the air.

4) This machine is stored in the warehouse and should be placed on a rack with a stacking height of no more than 5 boxes. After unpacking, the stacking height of a single packaged host should not exceed 5 boxes.

quality assurance

Within 18 months from the sale of this machine, if the user installs and uses it in accordance with the instructions and with the manufacturer's lead seal intact, and finds that the machine is not working properly, the manufacturer will provide free repair or replacement.