Arc temperature measurement with microsecond spectroscopic measurement

Abstract

The quality of electric power caused by frequency fluctuation and voltage rise will be degraded because of the lightning surge and the mass introduction of distributed power. Thus, it is necessary to improve the performance of gas circuit breaker in order to maintain the stable supply of electric power. It has been reported that the arc conductance is calculated as the index of the current interruption in numerical analysis. However, few report have the measured value in the current interruption. This is because that the current interruption is the steep phenomenon of micro seconds range. Thus, it is necessary to establish the time‐high precision and noncontact measurement method. In this paper, the arc temperature is measured near current zero using the microsecond spectroscopic measurement. As a result, the microsecond spectroscopic measurement which combines the conventional spectroscope and the high speed video camera is 200 times faster than the measurement of conventional spectroscope. For this reason, the microsecond spectroscopic measurement is possible with the high speed video camera. Therefore, it is possible to measure the arc temperature with decreasing the current using the microsecond spectroscope.

Cathode Spot Velocity of Atmospheric Arc Plasma after Arc Ignition Affected by Self and External Electromagnetic Force between Parallel Electrodes Using 3D Numerical Simulation

“…Because of the spatial nonuniformity and temporal inconsistency of the arc, it is difficultly and costly to verify the above hypothesis models [2][3][4] by experiment. Therefore, a three-dimensional electromagnetic thermal fluid simulation program is developed and used to analyze the physical properties of the cathode spot area during its advancement.…”

Synthesis of urea-modified magnetic nanocomposites iron oxide/carbon as a potential biomaterial produced by arc discharge in liquid medium and its in-vivo toxicity assessment

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“…However, the most destructive mechanism is the electric arc, which arises during the passage of the pantograph through a section insulator (Fig. 2) and the physical phenomena generated with it [6], including local, short-term temperature increase up to a maximum of 20,000 °C [7], rapid expansion of evaporated metal and air [8], molten metal particles, shock and sonic waves [9]. Under the influence of increasing temperature, the guide material plasticises.…”