2d Numerical Simulation of Magnetic Field in Low-Voltage Circuit Breaker

Abstract

Low Voltage Circuit Breakers is used for the switching process in power distribution and control system. This process is accompanied by the occurrence of the electric arc between the fixed and mobile contact pieces of the apparatus. The electric arc is introduced into the quenching chamber formed of ferromagnetic iron splitter plates, divided into short arcs and then the arc may extinguish after passing the current through zero. Behavior of the electric arc in the extinguishing chamber influences the performance of these devices, the ferromagnetic material leading to the improvement of these performances. This article presents the calculation of the magnetic field components in the extinguishing chamber of the low-voltage circuit breaker of the 2000 A, 690 V manufactured by Schneider Electric and to describe the physical phenomenon and mathematical calculation of the electric arc in LVCB. The Ansys Multiphysics program is used to determine the spectrum of magnetic field components. This program is based on the finite element method for solving Maxwell equations.

Electric and Magnetic Fields Analysis of the Safety Distance for UAV Inspection around Extra-High Voltage Transmission Lines

“…The potential function V is then approximated by a sum of shape functions f j (r) associated with each node j [9]:…”

“…For the magnetostatic model, the transmission line was positioned above ground with a magnetic permeability of 1 and a soil electrical conductivity of 0.02 S/m. A half-balloon type boundary condition (𝑅 = 320 m) was implemented, as shown in Figure 4, which simulates space that extends infinitely [9]. For each power line simulation, over a half-million mesh elements were required to achieve good symmetry and satisfactory analysis.…”

Software Program for the Evaluation of Human Exposure to Electric and Magnetic Fields

“…Thus, as is clear from the ideas presented above and from a study of the literature in the field of interest [12,13,15,18,19,[21][22][23][24]26], it is well known that in the assessment of the electromagnetic field generated by an OHTL, the stationary operating regime of the electromagnetic field is considered valid, so the electric field and magnetic field are analyzed and treated independently.…”

“…Experimental and numerical evaluations of electric and magnetic fields are presented in [18], in the area of an electric station in Xanthi, Greece; in [19], in a station in Jingmen, China; in [20], in a station in Finland; in [21][22][23], in different stations in Romania; in [24], in a station in the north-east of Brazil; in [25], in a station in Libya; and in [26], in the area of an OHTL in Bosnia and Herzegovina.…”