METHOD OF DETERMINATION OF POWER FACTOR Russian patent published in 1995 - IPC

FIELD: measurement technology. SUBSTANCE: at any unspecified moment of time momentary values of voltage and current and their values phase shifted relative to first ones through angle π/2 towards lead are measured and power factor is found by formula , where U₁, U₂ are momentary values of voltage correspondingly of examined circuit and of voltage shifted relative to it through angle π/2; I₁, I₂- are momentary values of current correspondingly of examined circuit and of current shifted relative to it through angle π/2. EFFECT: enhanced authenticity of determination of power factor. 2 dwg