Effective model for prediction of impulse strength of oil-impregnated paper insulation under nonstandard impulse voltages

Statistical mean volt-time characteristics for oil-impregnated paper insulation of different thickness have been plotted with standard 1.2/50 μs impulse waveshape. A generalized integration method, based on equal area criteria has been utilized effectively to predict the behavior of insulation for standard and nonstandard impulse responses. Prediction of volt-time characteristics for different thickness has been carried out using regression analysis and a mathematical model has been developed to predict the volt-time characteristics without conducting experiments. The model is also verified experimentally.