The generation of electrostatic charges in flowing dielectric fluids subjected to alternating fields

Several instances of anomalous failure in power system equipment have prompted investigations particularly in Japan [1] and in the US [2] to try to quantify and understand the streaming electrification process in dielectric liquids. Such studies have been successful in identifying the major parameters influencing the process but have usually been conducted by examining the charge separation and relaxation phenomena at an interface in a moving fluid without consideration of a super imposed electric fieid.