Three phase cable

QuickField simulation example

This is an example of the 3-phase cable simulation, performed with QuickField software. The cable consists of 4 isolated conductors and is buried in the ground.

Problem Type
Plane-parallel problem of AC conduction.

Geometry
Cable diameter is 80 mm, insulation thickness is 2 mm, shield thickness is 5 mm.

Given
Insulation dielectric permittivity 4, shield dielectric permittivity 2.
AC voltage U = 250 V (peak), frequency f = 400 Hz.

Task
Determine the leakage current.

Solution
The conductors' bodies are excluded from the model, as there is no electric field inside conductors. Instead, the electric potentials on conductors' surfaces are specified.

Result
The reactive leakage current is 0.57.. 0.64 mA per 1 meter of conductor length:

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