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<p>In order to study the burning explosion power characteristics of different dry-type bushings, the burning explosion experiments of resin-impregnated fiber bushing and resin-impregnated paper bushing under 10&#xa0;kV ultra-high voltages were carried out. The power parameters such as burning explosion pressure, fragment velocity, and temperature were tested, and the explosion power of the bushings was quantitatively evaluated. The results showed that the time-history curves of bushing explosion pressure all show two peaks, and there is a time difference between the two energy releases. In the same radius, the maximum explosion pressure of the fiber bushing is higher than that of the paper bushing by 34%-49%. For the fiber bushing, the first pressure peak is largest in the different radius range, but the first peak of the paper bushing is about half of the second peak, and the pressure duration is only half of the fiber bushing. The pressure propagation speeds of the fiber bushing and paper bushing are 380&#xa0;m/s and 452&#xa0;m/s, respectively. When the fiber bushing explodes, the average velocity of the fragments in the direction of the jet orifice is 94&#xa0;m/s, and the velocity of the fragments is only 10&#xa0;m/s in the direction away from the jet orifice. The fragment velocity in different directions is basically the same for the paper bushing is about 50&#xa0;m/s at a radius of 3&#xa0;m. The temperature rises rapidly when the fiber bushing explodes and continues for a long time when it is reduced to about 3000&#xa0;K. The time history curve of the temperature of the paper bushing shows an upward-downward-upward trend. The maximum temperature of the fiber bushing is 5399&#xa0;K, which is higher than that of the paper bushing by 724&#xa0;K<b>.</b></p>

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Test and Evaluation of Burning Explosion Power of Dry-Type Bushing

  • 期刊论文

  • 发表日期：

    2025年9月8日

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  • Jiahui Chen,
  • Deren Kong,
  • Liu Chao

摘要

In order to study the burning explosion power characteristics of different dry-type bushings, the burning explosion experiments of resin-impregnated fiber bushing and resin-impregnated paper bushing under 10 kV ultra-high voltages were carried out. The power parameters such as burning explosion pressure, fragment velocity, and temperature were tested, and the explosion power of the bushings was quantitatively evaluated. The results showed that the time-history curves of bushing explosion pressure all show two peaks, and there is a time difference between the two energy releases. In the same radius, the maximum explosion pressure of the fiber bushing is higher than that of the paper bushing by 34%-49%. For the fiber bushing, the first pressure peak is largest in the different radius range, but the first peak of the paper bushing is about half of the second peak, and the pressure duration is only half of the fiber bushing. The pressure propagation speeds of the fiber bushing and paper bushing are 380 m/s and 452 m/s, respectively. When the fiber bushing explodes, the average velocity of the fragments in the direction of the jet orifice is 94 m/s, and the velocity of the fragments is only 10 m/s in the direction away from the jet orifice. The fragment velocity in different directions is basically the same for the paper bushing is about 50 m/s at a radius of 3 m. The temperature rises rapidly when the fiber bushing explodes and continues for a long time when it is reduced to about 3000 K. The time history curve of the temperature of the paper bushing shows an upward-downward-upward trend. The maximum temperature of the fiber bushing is 5399 K, which is higher than that of the paper bushing by 724 K.