An improved arc model before current zero based on the combined Mayr and Cassie arc models

In this paper, a computer model that describes the dynamic arc behavior in the high- and low-current regions before current zero is proposed. The model divides the current and voltage waveform in two regions. A differential equation for both regions which unifies current and voltage time derivatives is obtained by means of a generalized function method. The computer waveforms reproduced with the model show good agreement with measured results published in [1] in the low and high current regions, but further comparison with other test measurements are required to know if the model has any feature of predictability.