Modified Habedank and TWV hybrid models of the arc with variable length for simulating processes in electrical devices

The paper indicates main difficulties in determination of characteristics and mathematical modelling of the electric arc. Limitations in practical use of the simplified and combined models of discharge with constant plasma column length have been pointed out. New plasma column models with variable arc length have been presented. The models consist of series or parallel connected elements corresponding to the modified Cassie-Berger and Mayr-Kulakov ones.