This paper presents a new analytical computation method for determining the magnetic field distributions in high-current busducts of rectangular busbars. This method is based on Biot-Savart law. The proposed method allows us to calculate the magnetic field intensity distribution in a set of parallel rectangular busbars of any dimensions including any length. In particular, the magnetic fields in busbars of unshielded three-phase systems with rectangular phase and neutral busbars, and the use of the method are described.


rectangular busbar; high-current bus duct; magnetic field; analytical method

Bottausio O. et al.: Numerical and experimental evaluation of magnetic field generated by power busbar systems. IEE Proc.-Gener. Transm. Distrib., Vol. 143, No. 5, 1996, pp. 455-460.

Cucu M. and Popescu M.O.: Magnetic field in encapsulated bus-bar. U.P.B. Sci. Bull., Series C, Vol. 73, Iss. 1, 2011, pp. 129-142.

Ducluzaux A.: Extra losses caused in high current conductors by skin and proximity effects. Schneider Electric "Cahier Technique" no. 83, 1983.

Kazimierczuk M. K.: High-frequency magnetic components. J. Wiley & Sons, Chichester, 2009.

Keiko T. et al: Calculation of magnetic fields of the bus bar. UPEC’95, Vol. 2, 1995, pp. 554-557.

Meeker, D.C., Finite Element Method Magnetics, version 4.2 (11apr2012, Mathematica Build),

Piątek Z.: Impedances of tubular high current busducts. Polish Academy of Sciences. Warsaw 2008.

Piątek Z., Jabłoński P.: Podstawy teorii pola elektromagnetycznego. WNT, Warszawa 2010.

Sarajčev P., Goič R.: Power loss computation in high-current generator bus ducts of rectangular cross-section. Electric Power Components and Systems, No. 39, 2010, pp. 1469-1485.

Sha X., et al: Analysis of 3-D electromagnetic field for three-phase low voltage and heavy current busbar bridge system. Inter, J. of App. Electromagn. and Mechanics, No.26, 2007, pp. 37-49.

Zhou J., Lewis A.M.: Thin-skin electromagnetic fields around a rectangular conductor bar. J. Phys. D: Appl. Phys., No. 27, 1994, pp. 419-425.

Published : 2013-12-27

Szczegielniak, T., Piątek, Z., & Kusiak, D. (2013). MAGNETIC FIELD IN RECTANGULAR BUS-BARS OF FINITE LENGTH. Informatyka, Automatyka, Pomiary W Gospodarce I Ochronie Środowiska, 3(4), 45-48.

Tomasz Szczegielniak
Politechnika Częstochowska, Wydział Inżynierii Środowiska i Biotechnologii  Poland
Zygmunt Piątek 
Politechnika Częstochowska, Wydział Inżynierii Środowiska i Biotechnologii  Poland
Dariusz Kusiak 
Politechnika Częstochowska, Wydział Elektryczny  Poland