Abstract：Electrical arc within a pair of AgSnO2 contacts is investigated when a DC inductive circuit is opened at different velocities. The arc is driven by axial and transverse magnetic fields. A 28V/5A inductive circuit is adopted as the experiment circuit, of which the time constant is 2 ms. Density of both the axial and the transverse magnetic fields varies from 0mT to 200mT. The opening speed varies from 10mm/s to 50mm/s. A high speed camera and an oscilloscope are used to record time variations of arc images and arc voltages, simultaneously. Relationships between flux density and arc parameters, such as arc durations, arc stagnation time, distribution of arc positions and arc root velocities, are obtained at those opening speeds. Material transfer mass is measured at every 5000 breaking operations. Influences of the magnetic fields on the transfer mass are obtained under two types of the magnetic fields at those speeds. The results can be used to design magnetic blow contacts in switches.
翟国富, 周学, 杨文英. 纵向与横向磁场作用下分断直流感性负载时的电弧特性实验[J]. 电工技术学报, 2011, 26(1): 68-74.
Zhai Guofu, Zhou Xue, Yang Wenying. Experiment on DC Inductive Arcs Driven by Axial and Transverse Magnetic Fields. Transactions of China Electrotechnical Society, 2011, 26(1): 68-74.
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