In the figure on the right, inside is Ed = 150kV cm. B in a system filled with insulating liquid U = 600kV voltage was applied to the sphere. r = 4, ra = 3cm, RB = 5cm, RC = 4cm 

a) Maximum Electric Field in the System at what point the severity occurs on the figure show and calculate the Emax. 

b) Drilling of the insulating material Please indicate the reasons for not perforation? 

S2. In a concentric spherical electrode system, the outer radius is 15cm, the perforation of the insulator between the spheres since its resistance is 90 kV / cm,

 a) Obtain the equation for the breakdown voltage. 

b) Since 300kV is applied between the electrodes, r1 (inner radius) can be taken to prevent piercing of the system. what range are the values? 

c) What is the maximum voltage value that the system can withstand?

 

B A 10cm 10cm 10cm 25cm 20cm