An improved Mayr-type arc model based on current-zero measurements [circuit breakers]

In this paper it is shown that the Mayr-type arc models can be used to describe the arc behavior before current zero exactly. Based on this analysis the different types of ‘modified’ Mayr arc models can be explained. As a result of the theory, an improved Mayr-type arc model - with a constant time parameter and a cooling power which is dependent on the electrical power input - is introduced and used to reproduce current zero measurements successfully.