Abstract
The aim of this study is to assess the influence of currents in one of two adjacent bus ducts on the electromotive force at the terminals of inductive coils mounted outside the enclosure of the second bus duct. The research methodology is described. The paper presents the results of computer modeling of magnetic fields around two bus ducts, installed side by side and rated for 10 kV, as produced by industry. Coefficients and a formula based on the Biot – Savart – Laplace law are provided, enabling the calculation of the total magnetic field induction at the location of the inductive coils, taking into account the influence of currents in the neighboring bus duct. It is shown that the greatest effect on the inductive coils is exerted by the current in the enclosure of the adjacent bus duct, which occurs during double earth faults. It has been established that, for the design of current protection systems, it is advisable to install the inductive coils opposite the busbars located farthest from the neighboring bus duct