In the low-voltage reactive power compensation system,the capacitor as the most core device in the reactive powercompensation cabinet, in addition to the impact of the useenvironment, the harmonic current, closing inrush current and long-term overvoltage is also very important, serious direct damage tothe capacitor, so a certain proporlion of reactors in series before thecapacitor to suppress and absorb part of the harmonic. Ensuring thesafety and stability of the compensation loop is the most common method at present.

WEL series low-voltage filter reactor and capacitor in series. caninhibit harmonic amplification, and filter out a certain proportionof harmonics, through accurate collocation, and capacitor inseries to form a passive filter, can accurately filter out a harmonic.while suppressing the inrush current into the capacitor, to protectcapacitors and other components.