Effect of electromagnetic shielding on the forces acting between conductors of three phase lines

When designing rotating electrical machines, transformer, and other electrical equipment for high power, it is necessary to resist the forces between the conductors carrying heavy currents. The paper deals with the magnetic shielding, which can reduce these forces. It presents a mathematical model of the magnetic field in the area of three parallel conductors of three‑phase supply. Based on the numerical solution the Lorentz force per unit length of conductors has been determined.

Methodological principles of electromagnetic screens application for public protection from electromagnetic fields and radiation

The growing levels of electromagnetic fields require the improvement of protective shielding methods. Frequency and amplitude parameters of fields have been analyzed according to national and international standards of electromagnetic safety and guidelines on shielding application have been given. The methodological principles of choosing and applying electromagnetic screens depending on radiation parameters and the required protection efficiency have been developed.