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Hi, I have a project requiring a 44 kV transformer rated at 250 kV BIL primary. The vendor is stating that expulsion and current limiting fuses cannot be supplied at 250 kV BIL. Do I forego these components in the transformer or have them supplied with a 200 kV BIL rating? Thanks in advance.

Just getting into using AmpCalc and trying to model cables that are not within the default libraries provided with the program. How do you all go about inputting your own cable library typically? The manufacturer data sheets does not have half the data that is required in the program. Does...

We have a Client that is requesting a 7 MVA motor upgrade at their facility by adding a 44kV-600V power transformer and some switchgear. Now, this as a requirement requires switchgear with ~7000 A requirement at 600 V. This would not be an easily obtained item. Would our best bet to split the...

I always though running CAT5 cables in conduits with AC/DC control cables (120 VAC, 125 VDC) was a no go. However, I am now being told that running armored CAT5 could be acceptable as the conduit is just a sleeve then. We are in Canada, can anyone comment here? Thanks

Hi, If I have an overhead line with OPGW at the top and have it down pole grounded every number of poles are surge arresters required on the line?

Hi, I am doing a grounding study for a wind farm. The turbine areas have high resistivity layers (granite) and it is hard to obtain low step and touch potentials and GPR. The system is as follows: YY autotransformer with a buried delta several mile long overhead collector line of ACSR with 5...

So I have been working as a field engineer for the past four years. I have the opportunity now to complete my P. Eng and have been toying with the idea of leaving the company or switching to another department. I have been offered a job in another department as a construction project coordinator...

I am having a problem understanding the reason for the starpoint connected in a certain way. For example, I know by convention that in differential protection, the starpoint of both CT's covering the zone of protection is always pointed towards the protected object. Why is this the case, is it...