Experimental and Photographic Study of Surface Discharges on Different Polymeric Materials.(Dept.E)

A photographic investigation of the surface discharges on specimens four polymeric materials is described. These are polystrene, polyvinyl chloride, teflon and prespex. Tests performed under A. C. voltage square each side length 10 cm thickness 0.5 mm to 6mm in non-uniform field consisting wire plane electrodes. The electrode has diameters ranged from 0.3 6 mm. inception found be dependent both factors namely diameter material thickness. relationship between this either two proposed form a straight line formula. recorded by camera using above-mentioned materials. determined means an oscilloscope. Some selected close-up photographs given here as example demonstrate nature discharges. oscilloscope current traces these also some reproduced for different