www.public4you.fora.pl

px941934

The level of rectangular concrete calculation of Grounding Resistance

gt; 0 region, this time to calculate an arbitrary field point r (z, Y,) should take into account their symmetry point of g (z,, a) its impact 【. 1) grounding established by this model with two kinds of concrete and the soil medium, and their resistance is generally not equal to, if they are equal == P, p of the model into a uniform medium in the ground situation, this time,[link widoczny dla zalogowanych], in order to test the correctness of methods and procedures, using the average potential method, shown in Figure 3. Depths obtained from the ground h, 4 length b,[link widoczny dla zalogowanych], semi-diameter of around 3 earth resistance. Reinforcement, composition and parallel to the ground the grounding resistance of a square type. =, N scold a,, a = inb + v \-1d], d = (6 +4 +6,, _24h2) / [a 4h2. (6 + River a +4 h2)], port 14 = ln (6 + √) one o.5in (b +4,[link widoczny dla zalogowanych],】 +(),\2a, the R. 2nL [Inhd +1] l00 + ll long copied University of Electric Power (Natural Science) and January 1999 l】 [3] the same formula. to take multiple sets of data validation, the proposed method obtained the ground resistance and the use of equation (5) obtained by the grounding resistance R. compared to the relative error is less than 13%. For example,[link widoczny dla zalogowanych], take p = 400n ・ m, bar length = plus rill, h-u0.5rill, steel radius d = 0 .02 in, the Phoenix = 19.5930, with the moment method can be regarded as the grounding resistance R = 19.437n.2) [4] p in the plane are given uniform soil ground resistance of grounding grid is calculated as Ro = {+ (ln 。')]-( 1.1 .128), (6) of its internal 1m deep concrete placed at the central level of a ground network, ground network length 5Om, wide 25rill, mesh was 4 of 6 steel, reinforced radius O. topiramate rill, concrete resistivity = 100n ・ m, soil resistivity = plus n ・ rill, be considered by the program concluded the grounding resistance is 0.8895n.4 method of moment, taking full account of grounding system symmetry and the mathematical techniques used by some of the basis for the preparation of the ground resistance calculation program, with a computing precision, high speed, accounting for less memory, etc., can be applied to complex levels of Grounding Resistance Thanks: Bong work was supported by Hunan University Professor, Department of Electrical amidine guidance of color, like the table where, e = 271828, h is the depth, do as the bar diameter, p is Shí Chen A / za references to the Lord, * \square mesh side 'length, N is the total number of mesh, L = 2A / (N +. N) .1 multiple sets of data obtained using this formula considered the procedures and ground resistance, the relative error of less than 6%, for example, of A = 100m100nl, N = 25, p = 1001n-m, d0 = O.04m, h = 1m the ground network, using equation (6) can be regarded 4R0 = 04774n, and this process can be regarded R = 04785n3 concrete foundation size example length 60m, width 40rill, high (deep) 5m, Hu Dengyu rectangular concrete foundation pile earth resistance calculation of Changsha University of Electric Power (from picking Sciences) .1998,13 (2): 83 ~ 86 Hu Dengyu application of concrete impact calculation of moments { grounding resistance of reinforced POWER Zhu surgery, 1998,21 (1): 20 ~ 22 unremitting wide disaster. power system grounding Beijing: China Water Power Edition rolled .11 S Hill 『laMMA,[link widoczny dla zalogowanych], shMME. (wY 【Af. J『 I1 Hill r Qiu canthus of call b8 curse tg Ⅱ] Xiu dgndlTIt black ysoll dish E1onPnD.1995, 10 (3): 1255 ~ l250 {; |} E operator Xie; Eg00B Festival Bristol; s; 0 §; few questions § § 80g zero 0 0 good cents | 0; Chu sea turtle Professor Li Yingqiu enjoy special government allowances in 1999 under the Ministry of Personnel,, k ~ (1999) 36 document, I Journal editor, director of the Institute of Applied Mathematics, Professor Li Yingqiu been approved to enjoy the In 1999 the State Council special allowance which is edited by Lee should seek the State Department of Education following the first prize of scientific and technological progress, this year received another national honor 【Editorial Staff) ■
More articles related to topics：

ugg laarzen Gas water heater exhaust gases CO, NOx

mbt scarpe outlet NEC Display push Opticlear techn

uggs online Distribution Automation _915 Kyushu, J