Reactive power automatic compensation controller features: 1. Calculation of reactive power switching capacitance, high compensation accuracy. Power factor measurement of high accuracy, wide display range. 2. Large-size LCD display, nice interface. 3. With automatic operation and manual operation two ways of working. Real-time display of each parameter grid. The real-time temperature display, protective equipment running. 5. With over-voltage, under-voltage, under-current, over temperature, over, under compensation protection. 6. Has the power-down protection, power-down data is not lost. 7. With the clock function, can display the current time. 8. The current signal is less than 0.01 ohm input impedance, high precision. 9. The maximum output of the control loop road number 24, to meet the user more loop compensation requirements. 10. Provide 485 communication interface, built-in MODBUS-RTU protocol, which enables remote monitoring. (Optional). 11. active alarm output. (Optional) 12. With automatic optimization, loop switching, control, switching function enables coding. 13. can achieve more than 180 days of historical data storage capabilities. (Optional) 14. This item of electrical metering function. (Optional) 15 having a voltage distortion protection. 16. harmonic inhibit function, anti-interference ability.