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Industrial High DC Voltage: Fields. Breakdowns. Tests, Volume 1
F. H. Kreuger
No preview available - 1995
A.C. voltage anode avalanche boundary breakdown strength breakdown takes place breakdown values breakdown voltage bushing calculated capacitance cathode cavity conductivity conductor configuration conformal mapping constant corona cylinders decreasing dielectric dielectric strength discharges earth edge elec Electric breakdown electric field electrodes electron avalanches emission epoxy Epsilon grading equation equipotential lines example field concentrations field lines field plots field strength fissure flashover flux lines foils follows formed gas molecules gases heat high field strength high-voltage cables higher homogeneous field impulse testing impulse voltage inclusions increases interface intrinsic breakdown ionization ions kV/mm layers lightning liquid material metal negative negative corona occurs overvoltage paper insulation parallel particles Paschen curve permittivity photons polyethylene potential distribution pressure protrusion radius resin semicon screen shape shown in figure solid insulators space charge sphere gaps stepped leader stress cone tangential field strength temperature Thermal breakdown transformer vacuum variables