SKM System Modelling - Separate CPC's (Grounding Conductors)

[cflatters]

Just a beware

Working with SKM PTW and undertaking fault level and protection studies ?

Working recently with SKM I noticed that the system takes no account whatsoever of separate earth / grounding conductors entered in parallel with the power cables, therefore protection studies and fault level studies involving ground-fault studies are potentially incorrect.

It would appear speaking to SKM that a separate cable entry must be made in the database for each combination of Cable CSA + Ground wire that is to be used ........ either that or unlink the cable from the cable library and manually edit the zero-sequence element of the Z matrix to take into account that parallel conductor.

If you were aware, i apologise for wasting your time ... if you were not, then I hope this has helped ....

Kind regards

 

[Kiribanda]

cflatters,
If I understand your concern correctly, I think you have to consider those parallel ground paths when you input the
value for the SPLIT fcator.