METHOD FOR MEASURING ACTIVE AND REACTIVE POWER COMPONENTS IN A C CIRCUITS WITH STEADY STATE SINE-WAVE VOLTAGE Russian patent published in 1995 - IPC

FIELD: electric measurement technology. SUBSTANCE: method involves measurement of instant current and voltage values in analyzed circuit carried out at time interval corresponding to fixed phase shift, calculation of power components by using measurement results; instant current and voltage values are measured twice at time interval corresponding to 90 deg. phase shift; each time current and voltage are measured simultaneously and power components are calculated from equations given in description of invention. EFFECT: reduced measurement time. 2 dwg