Geometrical selectivity of current sensors

We analyze the influence of external "unclamped" currents on contactless current sensors, especially the gradient sensor arrays and the current clamps. Best suppression of close currents can be achieved by using magnetic yoke with optimized shielding. DC/AC fluxgate current clamps of our design have low perming error and suppress external current by the factor of 20 000. Slowa kluczowe: Czujniki prądu, poziomowanie, ekranowanie, bledy pomiaru.