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Calculate maximum voltage that coaxial cable can have without corona effect. Radius of conductor is a=3mm, c=12mm. Cable has two concentric layers of dielectrics which are divided by radius b=6mm . Ɛ r1 =5, E S1 =400kV/cm, Ɛ r2 =8, E s2 =100kV/cm. Result: U max =108,13kV Could someone help? Thanks for replies.

Calculate maximum voltage that coaxial cable can have without corona effect. Radius of conductor is a=3mm, c=12mm. Cable has two concentric layers of dielectrics which are divided by radius b=6mm. Ɛr1=5, ES1=400kV/cm, Ɛr2=8, Es2=100kV/cm.
 
Result:
Umax=108,13kV
 
Could someone help?
Thanks for replies.

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