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Main >> Applications >> Sample problems

Electrostatic simulation of 3 phase cable - QuickField simulation example

This example is prepared by Dariusz Czerwinski

Engineering question

How to calculate field strength and potential in three-phase cable insulation?

Answer
Solve the plane-parallel electrostatics problem using the specified phase voltages and insulation permittivities.

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Typical applications
three-phase underground cables, cable conductor arrangements, power cable insulation layouts

Electrostatic simulation of 3 phase cable

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Simulation problem

Problem Type
Plane-parallel problem of electrostatics.

Geometry
3 phase cable Determine the field strength, potential in cable and in insulation. A B C GND

The diameter of the cable with insulation is 20mm (for all cables).
The insulation thickness is 2 mm.

Given
Relative permittivity of individual insulation ε = 3.3;
Relative permittivity of common insulation ε = 3;
Voltage applied UA = 9.8 kV, UB = -4.9 kV, UC = -4.9 kV.

Task
Determine the field strength, potential in cable and in insulation.

Results
3-phase cable electrostatic simulation

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