Filtering is superior to that of a traditional filter of the L or C type. Harmonic Sinusoidal term of the Fourier series expansion of a periodic function. In, there is a voltage harmonic with an rms value Un. Advisory organization that draws up international standards in the electrotechnical field. This configuration offers a substantial cost reduction but is applicable only to low outputs, under 3 kVA, because it results in an interruption lasting up to 10 ms during transfer and does not filter inrush currents.
All power drawn by the load passes via the inverter.
This is the only configuration used for high outputs. 9000 certification is proof that the quality system effectively complies with the standard. Current wave form is different from voltage wave form. Ohm's law is not applicable. It can be used only with each harmonic.