Analytical modelling of arc re-ignition conditions on polluted insulating surfaces

The main propose of this paper is the elaboration of an analytical relationship of arc dry-band re-ignition condition of HVAC polluted insulators. The model is based on the equivalent electrical circuit of polluted insulator and the thermal proprieties of the dry-band arc. The developed model shows that the propagation condition and the re-ignition condition are linked. The application of this model is in a good accordance with the experimental measurements.