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

Abstract

Abstract-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.

Thermal Transfers of SF6Electrical Arcs in High Voltage Circuit Breakers

“…We also consider that the electric eld remains constant in the arc column. One rst xes the initial plasma conductance g 0 to 10 4 S, which value corresponds to a conducting state, and which will enable us to compare our results with experimental ones reported by Schavemaker [9].…”

“…Also, this gas must have a high specic heat to absorb the thermal energy of the arc [2]. Many models based on a cylindrical geometry with radial temperature proles have been proposed and confronted to experimental results which are the most often obtained by spectroscopy emission of the hot zone of plasma [9].…”

“…The survey of these transfers has been led rst, for constant values of the deionization time, and afterwards, for variable practical deionization times [5,7]. The data obtained by numerical solving are compared to available experimental results [8,9]. * corresponding author; e-mail: moulaih@yahoo.fr…”

Review of Arc Models in Distribution Networks

“…The instantaneous models in different conditions are introduced in 3.2. The arc models are different in different applications, including arc in breaker, low AC voltage system [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. It is noted that the arc models for the energy calculation and secondary arc models are not introduced in this chapter.…”

Improving Breakdown Voltage Characteristics of GDAs using Trigger Voltage

“…The GDA is most effective in this domain because the discharged current can reach several thousand amperes without any commensurate increase across the terminals of the arc voltage. The conductive channel is composed of a plasma consisting of hot ionized gases; the main source of the electric charge carriers corresponds to the thermionic emission of the electrons from the hot cathode (T≈3000 K) [10].…”