The Arcless Method of Testing High-Voltage Oil-Filled Equipment for Explosion Safety

摘要

The present paper reports the results of experimental investigations of an arc discharge in the transformer oil under typical conditions of discharge occurring after internal fault in high-voltage oil-filled electric equipment. The flow of the transformer oil under the action of the jet of powder gases has been inves tigated. It has been shown that the actions of the arc discharge and the jet of powder gases are equivalent pro vided that energy and the time of action are the same. A new method of explosion safety tests is described in which the dynamic impact of the arc on high-voltage equipment is simulated by means of the dynamic energy stored in explosives. The suitability of the method has been demonstrated on trials of instrument transformers of the 110 kV and 330 kV class.