Current density in the unscreened three-phase high-current busduct

Design of the high-current busducts on high currents and voltages causes necessity precise describing of electromagnetic, dynamic and thermal effects. Knowledge of the relations between electrodynamics and constructional parameters is necessary in the optimization construction process of the high-current busducts. Information about distribution electromagnetic field is a base into analysis of electrodynamics and thermal effects in the high-current busducts. The paper presents analytical calculations of the current density in the three-phase high-current busduct which phase conductors are placed in vertex of a square. Into account were taken skin and proximity effect. The electromagnetic field produced by high-current busducts are usually calculated numerically with the use of a computer. However, the analytical calculation of the electromagnetic field is preferable, because it results in a mathematical expression for showing its dependences on various parameters of the line arrangement.