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Extensive high resolution electro-optic Kerr field mapping measurements have been taken with transformer oil near 20°c using parallel plane electrodes and field strengths near 0.2 MV/m. Static field measurements have been extended to the transient period following the application of a step voltage. Significant space charge effects resulting in electrode fields being enhanced by a factor of up to 2...
An experimental investigation of electric field induced motion in transformer oil is reported. The oil was subjected to a voltage step giving fields of up to 5 MV /m. The observations are explained in terms of a model based on behavior of particles both at the oil/electrode interface and in the bulk of the oil. The results indicate that charged particles with diameters less than one micro-meter, rather...
An experimental tool with a response time of milliseconds capable of indicating both the direction and magnitude of induced liquid motion within a stressed test gap has been developed. Observations are made at electrode surfaces with minimal disturbance. The basic principle of operation involves the use of an electrobalance to measure the force created by moving fluid at an electrode surface. The...
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