PROJECT TITLE :

Influence of temperature on electrical aging characteristics of polytetrafluoroethylene under nanosecond pulses

ABSTRACT:

Polytetrafluoroethylene (PTFE) has been widely employed in insulation equipment and high voltage equipment because of its wonderful insulating property. But, electrical aging phenomenon of PTFE might cause insulation failure underneath nanosecond pulses. Temperature is a crucial parameter that influences the electrical aging process. This paper investigated the impact of temperature on the electrical aging characteristics of PTFE below nanosecond pulses. A nanosecond pulse generator MPC50D based on magnetic pulse compression was used. The output voltage encompasses a rise time of 30 ns and a full width at half maximum of 70 ns. The needle electrode was adopted to accelerate the aging process. The testing chamber SP-80U was used to regulate the temperature and humidity. The experimental results showed that the inception voltage increased and therefore the speed of the aging method decreased when the temperature decreased. The consequences of the heart beat repetition rate and therefore the impacting mechanism of temperature on electrical aging characteristics were also discussed.


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