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Corresponding Author

Youssef, Fathi

Subject Area

Electrical Engineering

Article Type

Original Study

Abstract

The paper reports the influence of some different, currently used, polymer Insulating barriers on the AC withstand voltage of small oil gaps. The experiments have been conducted using barrier Samples of bakelite (Ba), polystyrene (PS) and polyvinyl chloride (PVC). The insulating barriers have been inserted in small oil gaps subjected to AC high voltage stress of weakly as well as, of very highly divergent fields. The improvement of the dielectric strength of all gaps through the insertion of polymer barriers has been found to be dependent on the kind of barrier material, barrier placement in the gap, barrier dimensions as well as, on the degree of the field homogeniousity of the gap. plantations of the different parameter effects are attempted by considering the different possible space charge distributions as well as, the special features of the used dielectric polymers. The achieved results are, not only important for barrier effect considerations, but also can be helpful as a guide for the design of oil - solid composite dielectrics.

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