Power losses in the screens of the symmetrical 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 and power losses is a base into analysis of electrodynamics and thermal effects in the high current busducts. In the paper using the Poynting theorem and Jolule-Lenz law the active and reactive power in the screens of the symmetrical high current busduct were determined. Into account were taken internal and external proximity effect.