The power of household appliance is direct proportion to that of mains voltage load, so the actual load varies. The hi-frequency filter network and low-frequency filter network are designed at the circuit respectively, can resist and control the surge current and impulse voltage caused by frequently starting the electrical appliances, so they are good for reaching the best efficiency of saving electricity with respect to input current/voltage, and the economizer has the good energy efficiency, what"s more, in general, most electrical appliances are the inductive loads. In addition, the wire of energy meter is leaded to the family internal wiring part, as for 220V above, the economizer will stabilize the voltage and reduce the current, as for 220V below, it will add the use capacity of system device to reduce the consumption of circuit and to prolong the service life of electrical appliance, finally to get the aim of saving electricity. Its min electricity saving ratio is up to 13%, and the max can reach as high as 30%.
   Household economizer equipped is helpful for improving the power factor not destroy the household appliances, and the reason of being equipped with Ban-Shen Power economizer is that the phase of inductive circuit is 90 0 lag, the phase of capacitive circuit is 90 0 advance, the power factor PF is equal to COS θ , and the electricity supplied by electric power corporation always passes the transformer or transformer box which is the inductive set and the phase is 90 0 lag, in light of these, the Ban-Shen Power economizer can be used to make the phase of the whole circuit approach to 0 0 , because of COS θ =1, W=VA．Cosθ, the nearer θ value gets to the 0 0 , the better use of power supply will be. The whole circuit presents the actual work not the virtual work, so the less virtual work you get, which means you waste the less electricity offered by the electric power corporation, as a result, you get the discount of electricity.