METHOD FOR ELECTRIC POWER MEASUREMENT IN TWO-CONDUCTOR NETWORKS WITH ANTITHEFT PROTECTION AND MEASUREMENT DEVICE Russian patent published in 2012 - IPC G01R11/24 

FIELD: electricity.

SUBSTANCE: device contains sensor 1 of phase conductor current, sensor 2 of neutral lead current, sensor 3 of phase conductor current which is connected to phase conductor before entry into building, sensor 4 of load voltage connected in parallel to load 5, multipliers 6, 7, 8, mathematic treatment unit 9, indicator 10 and data remote transfer unit 11 and control centre. At that data remote transfer unit 11 contains modulating current generator 12, high frequency generator 13, phase manipulator 14, power amplifier 15 and transmission antenna 16. Control centre contains receiving antenna 17, high frequency amplifier 18, mixers 19 and 47, retrieval unit 20, heterodyne 21, IF amplifiers 22 and 48, detector (selector) 23 of phase manipulated (P_mn) signal, frequency analysers 24 and 26, phase doubler 25, comparator 27, threshold switch 28, delay circuit 29, switches 30 and 54, demodulator 31 of P_mn-signal, multipliers 32, 33 and 51, narrow-band filters 34, 37 and 52, low-pass filter 35, recording unit 36, phase-invertors 38, 41 and 44, summators 39, 42, 45 and 50, 90°-phase shifters 46 and 49, amplitude detector 53.

EFFECT: improvement of interference resistance and reliability of data transfer about consumed power.

2 cl, 7 dwg, 1 tbl