Connect - Sizing of Earthing Conductor

RE: Connect - Sizing of Earthing Conductor

Duncan Brown — Tue, 23 Oct 2018 08:35:13 GMT

Hi Stuart

The reactive component of the CPC is very low in all these cases, and you also consider that in the case of parallel CPC's, the reactance used is one-half the reactance of a single cable.

As the reactive component changes very little in these cases, they will generate a fail at 400mm2

See the attached for more details.

Regards,communities.bentley.com/.../Copy-of-EarthFault-Calcs.xlsx

RE: Connect - Sizing of Earthing Conductor

StuartO — Tue, 23 Oct 2018 07:49:07 GMT

Duncan,

Its been sometime since I last herd from you.

Can you give me an update on this please.

RE: Connect - Sizing of Earthing Conductor

Duncan Brown — Wed, 05 Sep 2018 16:22:56 GMT

Hi Stuart - You haven't been forgotten - in fact you have been my priority all day...the software appears to be generating a very low resistance for parallel cpc's. I need to do a little more research into this. I will be back as soon as I have more information.

Regards,

RE: Connect - Sizing of Earthing Conductor

Duncan Brown — Tue, 04 Sep 2018 14:53:00 GMT

Thanks, Stuart - I've got that now. I can see why this might be causing concern. It does seem to be working backwards. I shall have to get into the code and see what's happening.

Regards,

RE: Connect - Sizing of Earthing Conductor

StuartO — Tue, 04 Sep 2018 12:53:22 GMT

Yes Duncan,

I included the 2 custom cable types and the newcab.ndx file in the root of the zip.

Stuart

RE: Connect - Sizing of Earthing Conductor

Duncan Brown — Tue, 04 Sep 2018 12:50:33 GMT

Hi Stuart

I am unable to size the system - when I try it generates a "Run Time Error 53" which is a file not found.

Are you using cable data that you have created yourself?

regards,

RE: Connect - Sizing of Earthing Conductor

StuartO — Tue, 04 Sep 2018 12:40:08 GMT

Duncan,

Files uploaded as requested.

Stuart

RE: Connect - Sizing of Earthing Conductor

Duncan Brown — Tue, 04 Sep 2018 12:32:04 GMT

Hi Stuart

Can you exit the software, zip up the project and use this link to get it to me? I can't really comment without seeing the project.

Thanks,