Bushing optimization

QuickField simulation example

Problem Type
Axisymmetric problem of electrostatics.

Geometry

Given
Relative permittivity of ceramic ε = 2.4;
HV conductor potential U = 10 kV
Plate potential 0 V

Task
Determine the optimal design of the pass-through insulator.

Solution
Three cases were simulated to compare the electric field stress values in the air and in the bushing material. Designs include the cylindrical bushing, bushing with a conductive layer on the lateral surface, and a bushing with a conductive layer and a conical tip.

Results
Electric potential distribution in the bushing.

• Cylindrical bushing
  
• Pass through insulator
  
• Cone bushing
  

Electric stress distribution along the surface of the cone bushing.

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