CapitalEquipment Would appreciate some help. That means I'd go with 100 Amps/sq.in. Q. I made 200 amp switch with tin coated copper busbar. During plating the cathode bar gets so hot you cannot touch it. My own thumb rule, which was already a well established guideline at the plating equipment manufacturer I went to work for in 1967 is simply 1 square inch (645 square millimeters) of cross sectional area in the bus bars for every thousand amps you want to carry. 1.68 x 10-8 ohm-m x 100 m / (1600 mm2 x 1 m2 / 1,000,000 mm2), so: Thank you very much for your post. trailer << /Size 64 /Info 22 0 R /Root 25 0 R /Prev 176828 /ID[<0106a25d7d8876649a4975b7d4d938f4><263729f7b2ee924bb0cf4b5d40b4daf1>] >> startxref 0 %%EOF 25 0 obj << /Type /Catalog /Pages 21 0 R /Metadata 23 0 R /PageLabels 20 0 R >> endobj 62 0 obj << /S 170 /L 285 /Filter /FlateDecode /Length 63 0 R >> stream A 1/4" x 4" buss however is at 1250 amps. but after looking up your company, I don't think that's the case, and what you will read on this page may be misleading :-(. 0000002904 00000 n There response was: trailer 0000001608 00000 n It is enough dimension for new copper ? Welding cable is often used because it's both flexible and designed to carry substantial currents. My question was very simple: A metal tool accidentally shorting out a 15,000 Amp power supply can be a spectacular event! 0000008406 00000 n I think you may need to retain an experienced electrician, electrical engineer, or plating consultant -- someone who has worked with this stuff and is familiar with the concepts being discussed. a 1/2" x 2" buss is listed at 1000 amps. .Xk6s(s$~h$H% !w3ZZ6 Calculate the 150 x 25 mm busbar current carrying capacity in all the above materials. Huh? For example, For 1500 Amps Which size Copper Bars I have to use Terminal box i.e. A. Hi Drew. Any ideas would be welcome. But if you were to look at that contact surface through a powerful microscope, you would see that only very small peaks and very limited areas are actually touching. 0000020501 00000 n Hb```f`` P @Qk&00L&,>Ib1O@Ae7N+S.k:Y$l6P0v Thank You. I need to reinstall some bus-bars in our factory. Their figures may be for bus bars enclosed in power distribution boxes or bus ducts rather than out in the open air. Good Morning 0000026542 00000 n 0000008826 00000 n Don't forget to check the ampacity of the anode rod when you fix the cathode rod. My opinion, and that's all it is, is that you should have ordered 6 mm x 52 mm (1/4" x 2") bars. A. Hi, Naresh. 0000052104 00000 n Silver bus bar carries 6000 Amps (1.6*150*25) Current. 0 I reached out to the folks at Storm Copper for validation. I have never claimed to be an electrical engineer, but have run a lot of wire in my day. Q. But please keep the discussion moving forward by trying your very best to phrase ongoing questions in terms of the answers that have already been offered. 0000070357 00000 n 9H^Q_P4s25g]DhE=E{H }JSm1G=7B Q. Hi to all, I want to know all types of Copper bars Current calculations. A. Hi Ajay. in has proven itself for decades. Parts are hung in the tank using steel fixtures with copper strips to aid the current flow as far as it is possible. 0000005026 00000 n You simply measure the voltage drop while the bar is carrying a known current. Further reproduction or use of this document is prohibited without the express written permission of ATIS. I feel you can proceed with what you have.

They are connected to the plating tanks with solid copper bars. I dont think the busbars are sufficient to carry that current but these are the standard busbars they send to everyone?? Ray. Good question. If you are speaking of an anode rod or cathode bar on top of the tank, yes, it's capacity could be 1500 Amps if it is bussed from both ends (750 A coming in from each end). This is specifically regarding hard chrome plating but can be applied to other types of plating as well. Q. 3bi50PK k`eiWj. free & open in air. 0000001800 00000 n Please advise. Khor, for an electroplating bussing installation I would consider the ampacity of a 12 mm x 100 mm busbar (slightly under 1/2" x slightly under 4") to be about 1860 Amps. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful. 0000023458 00000 n Cables are widely used in plating shops. Using my current bussing, what are my limits on DC Amperage, and what is the temperature rise above ambient that I should factor in? I am building a LiFePO4 battery with 280aH cell (8s configuration 24V) and they sent me tinned clad busbar (copper inside) of 2mm thick and 20mm wide by 90 mm length ( I know length does not matter). Architecural Manufacturers & Distributors, Architectural Installation Contractors Database, UNS Standard Designation for Wrought and Cast Copper, ASTM Standard Designation for Wrought and Cast Copper and Copper Alloys, European Numbering System for Non-Ferrous Metals, The U.S. Copper Industry: Critical to Keeping the U.S. 0000001240 00000 n I don't see how the voltage drop and cross section calculation you wish to do is any different than Khaled's example which I just worked for you.

Are these results based on peak current capability or sustained current capability? Ampacity rating to be used when the long axis of the bars is in the horizontal plane, or when the spacing between bars is less than the thickness of the bars, or when the bars are run in a vertical direction. So you would need 645 * 400/1000 = 258 square millimeters, and you've only got 228. Q. DC resistance of copper bus bar. I never considered that there would be a difference in ampacity for AC vs DC. 0000008590 00000 n and as stated above it's in line with 1000 Amp/sq.in. 0000014437 00000 n As you see, we appended your inquiry to a thread which I think will answer it for you: the copper needs 1 inch of cross sectional area for every 1000 amps. I would, however, like to make a suggestion. Operational, Copper - The World's Most Reusable Resource, Safe Drinking Water Act and Copper Alloys, Toxicological Differences in Lead and Copper, Lead-free Solders for Drinking Water Plumbing Systems, Alliance for Telecommunications Industry Solutions. So basically I will be making up the busbars myself with a whole lot of 3/8 bolts. g|G9=PMN]rB} ==.W9jZ`TC_h%|jE0YX7{|}a+ +6-\4VW|z[_XPu^[RshG1`= ~Xy%,ox\j$,%7Jkp W:({P=q:z_"Eha6 ,?yw||Cr'($Qg^#-W\oau ZU)$ntFa+K7&(:l:&,Mh0h=ls}qaCjv"}ZEtN oJf)3Un/gm~`E>,R[8 And also I want Aluminum Calculations also. At 200 amps the joints are heating to 70+ C. There should be no spot on the switch where the cross sectional area of the copper is less than 1/5 in2 because the current carrying capacity of copper is 1000 A/in2. No abstract questions. Thanks, Kurt. I know that the surface corrosion will have a very small impact but that the connections could be significant. Hence the formula for calculating current carrying capacity,if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'electrical4u_net-medrectangle-4','ezslot_6',109,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-electrical4u_net-medrectangle-4-0')}; Copper busbar current carrying capacity = 1.2 * Busbar width in mm * Thickness in mm Amps, Aluminium busbar current carrying capacity = 0.8 * Busbar width in mm * Thickness in mm Amps, Iron busbar current Carrying capacity = 0.6 * Busbar width in mm * Thickness in mm Amps, Galvanized busbar current Carrying capacity = 0.6 * Busbar width in mm * Thickness in mm Amps, Silver busbar current Carrying capacity = 1.6 * Busbar width in mm * Thickness in mm Amps. I would like to be able to size the fixtures and other conductors properly so that we avoid the failure problems and improve the efficiency of our plating in general. resistance specific dc formula wire physics conductor current solving volume circuits electric 0000009080 00000 n Yes. The number of sizes shown are not as extensive as those in the tables of AC ampacities, and there may be slight discrepancies between the ampacities shown here and those obtained by calculations derived from AC ampacities. This gives you measurable but not excessive voltage drops, and warm but not hot bus bars. And if this loss of performance is enough to change or clean the buss bar. I have a question for you: what's the whole voltage drop, cross section and short circuit current computing procedure of a DC busbar? If you wish to purchase a copy of the complete Standard, please visit the ATIS Document Center. 0n3p10*@cg,bz%A!A [I W5X7 Dv8@/}/hB+C 1CpE#'?fbo WJ endstream endobj 63 0 obj 240 endobj 26 0 obj << /Type /Page /Parent 21 0 R /Resources 27 0 R /Contents [ 38 0 R 40 0 R 42 0 R 44 0 R 46 0 R 48 0 R 50 0 R 53 0 R ] /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 >> endobj 27 0 obj << /ProcSet [ /PDF /Text /ImageC ] /Font << /TT1 33 0 R /TT3 28 0 R /TT5 29 0 R /TT7 35 0 R >> /XObject << /Im1 51 0 R >> /ExtGState << /GS1 58 0 R >> /ColorSpace << /Cs6 34 0 R >> >> endobj 28 0 obj << /Type /Font /Subtype /TrueType /FirstChar 32 /LastChar 89 /Widths [ 342 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 711 711 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 776 762 724 0 683 650 0 0 546 0 0 637 948 847 850 733 0 782 710 682 812 0 0 0 737 ] /Encoding /WinAnsiEncoding /BaseFont /AAMONM+Verdana-BoldItalic /FontDescriptor 36 0 R >> endobj 29 0 obj << /Type /Font /Subtype /TrueType /FirstChar 32 /LastChar 176 /Widths [ 352 0 0 0 0 0 0 0 454 454 636 0 364 454 364 454 636 636 636 636 636 636 636 636 636 0 454 0 0 0 0 0 0 684 0 698 771 632 575 0 751 421 0 693 0 0 0 0 0 0 0 0 616 0 0 0 0 0 0 0 0 0 0 0 0 601 623 521 623 596 352 623 633 274 0 592 274 973 633 607 623 623 427 521 394 633 592 818 592 592 525 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 542 ] /Encoding /WinAnsiEncoding /BaseFont /AAMONO+Verdana /FontDescriptor 31 0 R >> endobj 30 0 obj << /Filter /FlateDecode /Length 214 >> stream xref HWiF. @ |Kj ;!EGK#&0l"W^Ui0o?wYlnd)Ffvk3mm3;0UE$00b-+fBf[ mKnw'k1Ke/e{SE(Y9k>.VE/xqEaBIM}y7:7"{88Q(Q.PrC(!y$-?^DR <]>> Thank you for very useful information; I have question as I work only in AC and I'm managing project for DC busbar with the following data: length 100 m, Current 2000 A, Voltage 48 V, size 1600 mm2. Also, How many carbon brushes to be used at each side. 0000083756 00000 n 0000011129 00000 n A. Q. Hello, I need to know the calculation for DC bus bars Size for Copper and Aluminium. But in my own experience, plating shops rarely use plated ends or buss bar clamps: they just drill holes, and wire brush No-Ox-Id compound onto the joint area before bolting together. i. Ted 0000007519 00000 n Drew, "No-Ox-Id" Compound I just want to make sure I keep to the correct PCD for the bolts as to not affect the load capacity of the busbar negatively. The following tables have been provided by the Alliance for Telecommunications Industry Solutions (ATIS), T1 Committee, and represent ampacities for busbar sizes and arrangements typically found in the telecommunications industry. I have seen plating shops clear coat or lacquer their bus bar runs (except for the connections of course) and it does seem to hold up well and to look better than streaky green stained copper. Q. The ampacity rating is based on a 30C rise above a 40C ambient. I can't exactly answer your inquiry, but think of this: when two flat surfaces of say 1" x 1" contact each other, we might say that the contact area is one square inch, and the DC ampacity of the joint is therefore 1000 Amps. A. Hi Shiva. 0000008384 00000 n Q. I am looking into the ratings for the Bus bar that is used on my anodizing tanks. But the voltage has little to do with it (in this limited context of bussing a plating tank that operates at the usual industrial levels). How can I calculate how much current can I send through a solid conductor? So you will see that empirical numbers are used instead. However, Storm is suggesting to derate the AC by 30% for DC current meaning those two bars would be 700 and 875 amps. Thank you, A. Hi Khaled. 0000023480 00000 n I will appreciate any help you can provide.

Note to readers: The internet is a giant one-room schoolhouse where you can "overhear" stuff and misapply it; I'm talking about copper bus bars carrying DC current in electrowinning operations; I'm not offering a general theory applicable to all electrical contact surfaces :-), Q. Hi Ted has a good point about the calculations, but this is not written in stone. The KVA waste sounds like 2000 A x 2.1 V /1000 = 4.2 KVA. Although voltage drop is proportional to the length of the bus bar, it's not conventional to use different cross-sections of bus bar for lengths of 6 meters vs 1 meter. The resistance of the bus bar is calculated as: R = x l / A That's a lot, and it would apply to each pole if they're both 100 m long. %PDF-1.3 % 0000001854 00000 n ! I am long familiar with open bus bar systems which have no insulation at all, and which have been used for many decades in plating shops -- but I've also seen movement toward people no longer accepting open bus bar systems as being safe, especially as we get to higher voltages like 24 V. Welding cable sized at 1000 Amps/square inch can be used as an alternative to open bus bar, but doesn't fully address the issue of people working with live 24 v systems. The resistivity of copper bus bar is about 1.68 x 10-8 ohm-m, so I get as the resistance of your bus bar: I have a rectifier it gives output 24 volts DC and 15000 amps at source to load in distance 6 m, 5 m, 2 m, 1 m. At what size of busbar(or) cables are taken my application and what type of insulation I prefer to the bus bus at safe conditions. when submerged, even if the particular steel were a little lower in conductivity. 0000002352 00000 n Q. Hello dear Ted, Sorry, but we'd just run in circles and never get anywhere if, after 30 postings on a subject, instead of asking for specific clarifications people just say "start over and tell me everything" :-). Suggest me the methods of measurement of the resistance and inductance of a copper bus bar. 24 0 obj << /Linearized 1 /O 26 /H [ 1240 353 ] /L 177436 /E 115625 /N 4 /T 176838 >> endobj xref 24 40 0000000016 00000 n What could the heating be due to? Save my name, email, and website in this browser for the next time I comment.

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