In: Electrical Engineering
The inner and outer diameter of a single core cable
are 3 cm and 8.5 cm The insulated with two materials having
relative permittivity of 5 and 3.5 respectively with corresponding
maximum electric stresses of 35 kV/cm and 25 kV/cm. Draw the
configuration and calculate:
a) the radial thickness of each insulating layer.
b) the safe working voltage of the cable.
c) draw the voltage and electric stress as a function of radial
distance from center to metal sheath.