The controller is composed of microprocessor, RAM, interface, sampling the phase and amplitude of voltage, sampling the phase and amplitude of current, intermediate relay drive and LED display. The program logic, which simulates the artificial optimized decision, measurement and control, is solidified in ROM.According to the magnitude of wattless power and the over-voltage or under-voltage, it can effectively control the reasonable regulation of compensating capacitors and can thoroughly eliminate the invalid and over-frequency operations. The invention can be mated with the screen of capacitors to construct an apparatus for automatically compensating the power factor (or wattless power) and improving the quality of electricity supply. |