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Surface Arcover in DC Capacitors

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2 Author(s)
Loescher, D.H. ; Sandia Labs. ; Gumley, C.

Data useful in the design of dc capacitors have been taken on the voltage for arcover VAacross a distance d on the surface of an insulating polymer film. It is found that VA (kV) = 3d (mm)0.55for arcover in air at p = 83 kPa, T = 20°C and 30 percent RH. The equation applies to buried foil capacitors and to an electrode configuration that simulates a single turn of an extended foil capacitor. For extended foil capacitors it is found that VAincreases as 1.0d0.90.

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Parts, Hybrids, and Packaging, IEEE Transactions on  (Volume:12 ,  Issue: 2 )