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Effect of Temperature on the Pre-breakdown Pulses of Conduction Current in Insulating Oils

Abstract

IT has been previously1,2 reported that the pre-breakdown conduction current pulses in liquid dielectrics are very sensitive to test conditions and the composition of the test liquid. It has been found that a convenient way of investigating these pulses is to record them as a double trace on a high-speed magnetic tape (speed 75 in./sec). By using two play-back heads which can be displaced relative to each other it is possible to obtain the autocorrelation function of the random pulses. To reduce distortion and interference, frequency modulation before recording and demodulation during play-back were used.

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References

  1. Nosseir, A., Nature, 198, 1295 (1963).

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  2. Huq, A., and Tropper, H., Brit. J. App. Phys., 15, 481 (1964).

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  3. Buckingham, A., Numerical Methods (Isaac Pitman, 1957).

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MEGAHED, I. Effect of Temperature on the Pre-breakdown Pulses of Conduction Current in Insulating Oils. Nature 205, 686–687 (1965). https://doi.org/10.1038/205686a0

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