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

Light Scattering Characteristics of Biological Tissues in Coaxial Ultrasound-Modulated Optical Tomography

“…The oil used was B 30 transformer oil. The technique adopted for the study of the current pulses has been described elsewhere (Megahed 1965). It consisted essentially of recording the pulses during the experiments using a fast tape recorder.…”

“…Several workers (House 1957, Zaky et al 1963 have reported that such pulses could be reduced to a low level of activity by a prolonged stressing of the test gap (stress-conditioning). More recently a number of investigations (Nosseir 1963, Huq and Tropper 1964, Megahed 1965 have been undertaken primarily to study the nature of these pulses and the influence of test conditions on their occurrence and distribution. Although some workers tend to attribute the pulses to the presence in the test liquid of charged microscopic impurity particles which under the influence of an applied field continually oscillate between the electrodes, the evidence is not conclusive.…”

Conduction current pulses in transformer oil

“…The technique adopted for the study of the current pulses has been described elsewhere (Megahed 1965). It consisted essentially of recording the pulses during the experiments using a fast tape recorder.…”

Pre-breakdown conduction current pulses in insulating oils under non-uniform field conditions

“…The significance of the current pulses lies in the fact that they may be regarded as breakdown initiating events which in the absence of appropriate conditions may not lead to complete breakdown. Recent investigations (Nosseir 1963, Megahed 1965 proved that these current pulses have an important bearing on the breakdown mechanism. We now take a closer look at these current pulses and consider their statistical properties by analysing their pulse heights.…”