Waveforms of Impulse Voltage and Their Creeping Flashover Voltage Characteristics

Four kinds of impulse voltages（0.1x40），（1x40），（6x40）μs and（3x40）μs having unidirectional oscillations on its wave tail have been applied to two electrodes which were arranged on the surface of glass，vinyland porcelain pipes，and then creeping flashover were produced on the surface between electrodes． Plus flashover voltage is not likely to be affected by the steepness of the wave front，but minus one is higher according to the decrease of steepness of the wave front．Oscillatory voltage （3x40）μs always indicates a highest flashover voltage．From a standpoint of view of space charges between electrodes，these characteristics are discussed．Moreover the relations between the voltage characteristics of Lichtenberg’s and Dust figure，and creeping flashover voltage characteristics are also discribed