Bushing insulator - QuickField simulation example
3-phase bushing insulators 10kV rated are installed on the transformer tank cover.
How to find electric field in transformer bushings?
Answer Typical applications Geometry 3D extrusion.
Given
Task
Solution ResultsEngineering question
Set up a 3D QuickField Electrostatics problem for a transformer bushing insulator and evaluate electric field distribution from computed field results.
transformer bushings, oil-air insulation interfaces, high-voltage insulation assemblies
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Simulation problem
Problem Type electrostatics.
Relative permittivity of air ε = 1,
Relative permittivity of oil ε = 2.2,
Relative permittivity of insulator ε = 6,
phase A electric potential UA = 10000·√2/√3 · cos(0) = +8165 V,
phase B electric potential UB = 10000·√2/√3 · cos(120) = -4082 V,
phase C electric potential UC = 10000·√2/√3 · cos(240) = -4082 V.
Find the maximum field strength at the insulator and the electric field distribution.
To find the maximum field strength it is enough to simulate the electrostatic field at the moment of maximum voltage at the specific phase insulator. Phase A insulator maximum field simulation is presented (for phases B and C similar approach should be used).
Electric field strength distribution at the surfaces of the insulators is presented at the picture below.
Video
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