Time Transition of Temperature Distribution of Contact Wire Affected by Angle of Movement of Contact Strip in Disconnection Arc

Electric power used in electric railways is supplied through the contact wire and the contact strip. The disconnection arc occurs, and then, the contact wire may erode in the case the gap between the contact wire and the contact strip is small. In order to elucidate the phenomenon of the contact wire erosion caused by the disconnection arc, the mechanism of the heat input to the contact wire is necessary to clarify. The temperature distribution of the contact wire considered a vertical movement of the contact strip has been reported. However, most of the disconnection arcs occur while the electric railway is running, it needs to be clarified the difference in the time transition of the heat transfer and the electron condensation heat when the contact strip moves diagonally. In this paper, the time transition of temperature distribution of the contact wire affected by the angle of movement of the contact strip in the disconnection arc was calculated using a three-dimensional electromagnetic thermal fluid simulation. As a result, the difference in heat input between when the contact strip moved vertically and when it moved diagonally became apparent.