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Main >> Applications >> Sample problems

Arcing horns bushing insulator - QuickField simulation example

Arcing horns protect bushings in case of the overvoltage.

Engineering question

How to find electric field stress in a bushing with arcing horns?

Answer
Calculate stress distribution along the bushing surface and spark gap with the arcing horn geometry represented in 3D.

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Typical applications
substation bushings, lightning protection fittings, arcing horn assemblies

Arcing horns bushing insulator

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Simulation problem

Problem Type electrostatics.

Geometry 3D import
Bushing insulator arcing horns Arcing horns protect bushings in case of the overvoltage Arcing horns HV Plate Insulator GND

Given
Relative permittivity of air ε0 = 1,
Relative permittivity of insulator εr = 6,
HV = 6 kV (RMS).

Task
Electric field stress along a bushing-insulator surface and across its arcing-horn spark gap, showing the field distribution under the applied high voltage.

Results
Electric field distribution in the spark gap.
Electric field distribution in the spark gap of arcing horns

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