JakeLong
Electrical
- Jun 23, 2023
- 4
I'm trying to calculate the zero sequence impedance of a cable for the calculation of single phase to ground fault and could use some clarification.
The cable in question is 3x300/25mm² NA2XS2Y 6/10(12)kV, which there will be installed two of in parallel along with a 35mm² PE conductor.
Is it right to assume Z0 = Z1 + 3*Ze, where Ze is only the impedance of the PE conductor. Or should the impedances of the metallic screen and earth be included in the calculation, as a parallel impedance?
The cable in question is 3x300/25mm² NA2XS2Y 6/10(12)kV, which there will be installed two of in parallel along with a 35mm² PE conductor.
Is it right to assume Z0 = Z1 + 3*Ze, where Ze is only the impedance of the PE conductor. Or should the impedances of the metallic screen and earth be included in the calculation, as a parallel impedance?