Return-Path: Received: (qmail 29388 invoked from network); 14 May 2002 14:08:45 -0000 Content-Transfer-Encoding: 8bit X-Priority: 3 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 14 May 2002 14:08:45 -0000 X-MSMail-Priority: Normal Received: (qmail 20778 invoked from network); 14 May 2002 14:08:38 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from unknown (HELO post.thorcom.com) (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 14 May 2002 14:08:38 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 177cwM-0000NF-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 14 May 2002 15:06:10 +0100 Received: from astral.infomsk.ru ([212.164.44.2] helo=astral.omskcity.com) by post.thorcom.com with esmtp (Exim 3.33 #2) id 177cwK-0000N7-00 for rsgb_lf_group@blacksheep.org; Tue, 14 May 2002 15:06:08 +0100 Received: from fitec.omskcity.com (mu06.dialup2.infomsk.ru [212.164.44.118]) by astral.omskcity.com (8.9.3/8.9.3) with SMTP id VAA3ce1195e3970 for ; Tue, 14 May 2002 21:04:14 +0700 (OSS) Date: Tue, 14 May 2002 21:44:34 +0000 (GMT) From: "Alexander S. Yurkov" To: rsgb_lf_group@blacksheep.org Subject: RE: LF: Ground loss In-reply-to: <3.0.1.16.20020514131621.08dfed86@pb623250.kuleuven.be> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi, Rik. On Tue, 14 May 2002, Rik Strobbe wrote: > >If Lcp=0 this means that ground wire only touch to the ground in infinity > >small point. So R should be infinity large. If there is no conterpoint > >Lcp is a ground rod length. > I agree about Lcp is really 0. > But if I take Lcp = 0.2m (short ground rod only), Lant= 30m , C = 150pF (Xc > = 7800 Ohm) and a = 0.01 then R = (Lant/Lcp)*a*Xc = 11700 Ohm. I believe > that this value is far too high, a more realistic value would be a few > hundred Ohm. You are right. May be it's because I assumed conterpoint ON THE GROUND, not burred... I will thinking about bured wires... 73 de RA9MB/Alex http://www.qsl.net/ra9mb