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That's the point! Usually menas the same, but protection engineers make diference between 50 and 50P. That way my question regards martin

Hi! ¿Does anyone know the diference between the protection functions 50 and 50P. The same thing with 51 and 51P.? Im not taking about 50/51N In some projects I saw that engineers make diference between 50 and 50P Thanks in advance Martin

Here is the Zoom. http://files.engineering.com/getfile.aspx?folder=b086281b-b7b2-400b-b338-eb8761660c49&file=zoom_inrush_current.JPG

Actually I run ATP, but I´m not sure if the result is correct. The ATP "cut" the peaks of the current. I think that is incorect. I attach a current graphic and a zoom where you can see how the peaks are cut. thanks in advance Martin...

Hello I need to know how is the inrush current wave of a no loaded cable 1x150 mm² (300 MCM), 4.16 Kv, 29 Km (18 Mi), 60 Hz. I undertand the first ones cicles have a high frequency, but i have not idea which is that freq. Can anyone help me. Sorry about my english Thanks in advance Martin

Thanks a lot jghrist!!! Martin

Hi! Does anyone knows how to calculate the effect of solar radiation in transmission lines (ACSR, AAAC, AAC, etc)?? Thanks in advance Martin

Thanks burnt2x and Marmite. I made a mistake. The system is 32 miles long. I´ll look in the BICC Cable handbokk. Thanks again Martin

Hi! I have a 110 KV cable of 320 miles. I have to do cross-bonding of the screen, but I dont know how many link boxes should I put. Anyone can help me?? Sorry about my english Thanks in advance Martin

Does anyone can suggest me some publications about GIS Vs. AIS? Thanks in advance Giordano

Thanks kiribanda By I understand, the maximum potencial in not equal to zero. "What is your electrical installation code in Argentina?" If when you say "code" means "standard", In argentina we use IRAM standard that is extracted from the IEC. Please teel me if this is ok for you Sorry about...

Thanks to all of you! I need the maxim allowed tension between the neutral (in the load) and the ground (in the load). Because I live in Argentina, I need the IEC standard values. A TT system was well explained by "skogsgurra" and "ScottyUK". So, if anyone knows the IEC Standard were I can find...

Hi! Does anyone knows what is the maxim allowed tension between ground and the neutral in a TT system?? Thanks in advance Martin

Thanks again Cuky2000. The links posted above (cuky2000.250free.com.......) are your papers? Is it posible to have all pages of them? I think they are very interesting. thanks Martin

Cuky2000, do you have more information about the link that you posted??? I´m talking about the way to find GMD, Kn, etc. thanks in advance Martin

That´s right cuky2000. Homopolar = Zero Sequence. Thanks cuky2000 and Wareagle. Both informations were useful.

Actually, it´s not the same. Like an aproximation, Zo = 4 R1 + j 2 X1, but it´s not exactly that. So I would like to know who can I calculate it. Thanks anyway Martin

How can I calculate the Homopolar Impedance of a cable from the manufacturer data?? Thanks in advance Martin

Thanks aolalde! I know wath you say, but the manufacturer dont want to give that information because it's their "know how". That's why I was looking for another way to find that information. Thanks again Martin

Hi! Does anyone know where can I find the thermal time constant of electrical asynchronics motors? thanks in advance. Martin