ELECTRICITY METER Russian patent published in 1995 - IPC

FIELD: electric measurement technology. SUBSTANCE: meter has current and voltage changers 1 and 2, selector switch 3, transformerless power supply 4, multiplier 5 with differential inputs, switch 8, reference voltage source 9, integrator 12, reference-frequency oscillator 13, feedback pulse shaper 14, and pulse counter 15. Newly introduced are selector switch 6, storage capacitor 7, pulse shaper 11, diode bridge in transformless power supply 4, and differential inputs in multiplier 5, as well as switch 10. EFFECT: provision for compensation of additive error of multiplier 5, reduced power requirement. 3 cl, 2 dwg