JKWF series reactive power split-phase automatic compensation controllers use a high-performance 16-bit microprocessor as the core device to simultaneously sample 3-phase voltage and 3-phase current signals. A single controller provides a maximum of 18 control loops. The sub-main machine (a single main machine can bring 2 auxiliary machines) mechanism, the largest can provide 54 control loops. The compensation function of each control loop can be changed arbitrarily by modifying the control parameters, and can be used for full-phase compensation, total common-compensation, and common-compensation plus split-phase compensation. Provide 12 kinds of switching coding schemes, users can choose arbitrarily by modifying the control parameters. Once the control parameters are modified and saved, they will not be lost when power off. It can provide RS485 interface and adopt MODBUS-RTU communication protocol, which can remotely complete the switching of capacitor banks, the modification of control parameters, the monitoring of power parameters and the switching status of capacitor banks. The switching of the capacitor bank is controlled by the combination of fundamental wave power factor and fundamental wave reactive power, and the switching is stable without switching oscillation, and is not sensitive to the interference of voltage harmonics and current harmonics. Character LED and LCD are used to display control parameters and power parameters, with friendly man-machine interface and beautiful appearance. It is suitable for automatic control of reactive power compensation of AC 45Hz-65Hz power system below 0.4KV. Make the power factor reach the user-predetermined state. Improve the utilization efficiency of power transformers, reduce line losses, and improve the voltage quality of power supply. The components are mounted by patch, reflow soldering, and multi-channel inspection, so that each unit has the same stability and reliability.Rated voltage: AC 220V±10% Rated current: AC 0-5A Rated frequency: 50Hz±5% control parameter Sensitivity: 100mA COSφ preset: 0.80-0.99; step size 0.01; factory preset 0.98 Switching delay: 2-250s; factory preset 30s. Overvoltage protection: 230-260V; step size 1V; factory preset 253V CT change: 50/5A-3000/5A; step size 1V; factory preset 500/5A Capacitor capacity: 0-99kvar factory prefabricated 10kvar per branch Contact capacity: dynamic output DC 12V × 50mA per branch Static output 380V×7A/200V×5A per branch measurement accuracy: Voltage: ±0.5% Current: ±0.5% Power factor: ±1.0% Active power: ±1.0% Reactive power: ±1.0% Hole size: 113×113mm Power supply: 100V/220V/380V is shared with voltage signal, can measure voltage and current distortion rate Signal sampling: 2-phase voltage and 1-phase current with harmonic protection function Larger circuit: 1 to 16 circuits with manual operation mode Shorter delay: active 0.5 seconds: node 2 seconds with the function of switching first and then switching (can be used for passive filter control) Offers 12 capacity coding schemes Note: Other voltage levels need to be customized, special functions can be customized as required Structural features: 1. Calculate the switching capacitor capacity based on the fundamental wave reactive power, which can avoid any form of switching shock, and can correctly display the power factor of the grid in the presence of harmonics; 2. High power factor measurement accuracy and wide display range; 3. Real-time display of total power factor (PF) and fundamental power factor (DPF); 4. Real-time display of voltage distortion rate and current distortion rate; 5. There are 12 kinds of encoding output methods for users to choose, 6. More than 16 outputs; 7. The man-machine interface is friendly and easy to operate; 8. Various control parameters are fully digitally adjustable, intuitive and easy to use; 9. It has two working modes: automatic operation and manual operation; 10. With over-voltage and under-voltage protection functions; 11. It has the function of voltage harmonic over-standard protection; 12. With power-down protection function, data will not be lost; 13. The current signal input impedance is low <0.01Ω; 14. With communication function (MODBUS-RTU RS485); 15. The target power factor adjustment range is wide, lag 0.70 to lead 0.70; 16. It can communicate with PDA. Conditions of Use: Ambient air temperature: -25℃～+50℃; Relative humidity: ≤50% at 40°C; ≤90% at 20°C; Altitude: ≤ 2500 m; Environmental conditions: no harmful gases and vapors, no conductive or explosive dust, no severe mechanical vibration.