1 The sectional drawing shown shows a section of a cylindrical conductor (high voltage cable) with two insulating layers

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1 The Sectional Drawing Shown Shows A Section Of A Cylindrical Conductor High Voltage Cable With Two Insulating Layers 1 (49.46 KiB) Viewed 60 times

1 The sectional drawing shown shows a section of a cylindrical conductor (high voltage cable) with two insulating layers. The voltage U on the cable is 100 kV. The cable is earthed at the outer shield. Ery U = 100 kv, ri = 1 cm r2 = 2 cm r2 = 2 cm Er, Er Figure 1 Structure of the coaxial cable 1.1 In which dielectrics and at which radii do the maximum field strengths occur? 1.2 How great must the voltage UG at the boundary layer of the two insulating layers be so that the field strength maxima in the insulating material areas are the same? 1.3 For Er, = 5, determine the value for er, so that the field strength maxima in the two areas of the insulating material are the same. Display the course graphically in a diagram. 1.4 For Er, = 5 and er, the potential at r= 1,5 cm has to be calculated Calculate the capacitance of the arrangement for case 1.4.