METHOD OF CURRENT MEASUREMENT

FIELD: electricity. ^ SUBSTANCE: invention refers to power industry, namely to instrumentation. Method of current measurement using reed relay arranged nearby conductor consists in the following: time t1 between moments of closing and opening of reed relay contacts is measured and amplitude Im is calculated. At that n-1 of reed relays is arranged additionally nearby conductor in such a way that i reed relay closes contacts under current Ii in conductor and condition Ii < Ii+1, where I=1, 2,Çn is met. Number k of actuated reed relays is calculated and ratio K' of current in conductor to current Ii of first reed relay actuation is approximately defined by inserting of currents of actuation of first, k and k+1 reed relays into formula: ^ where Ik and (Ik+1) - current of actuation of k and (k+1) reed relay. is found at K = K' as per dependence tav = f(K) of proper time of actuation (contacts closing) of first reed relay on ratio of current in conductor to current of first reed relay actuation, and exact value of amplitude Im is calculated. Technical-and-economic efficiency is achieved due to more precise measuring of current and power in measuring systems during electric power transmission. ^ EFFECT: increase of current measurement accuracy. ^ 3 dwg Изобретение относится к энергетике, а именно к измерительной технике. Способ измерения тока с помощью геркона, расположенного вблизи проводника, заключается в том, что измеряют время t1 между моментами замыкания и размыкания контактов геркона и определяют амплитуду Im расчетным путем. При этом дополнительно располагают n-1 герконов вблизи проводника так, чтобы i-й геркон замыкал контакты при токе Ii в проводнике и выполнялось условие Ii