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'<br>By now you have all the information you need to make an educated choice when buying your commercial electric bus ducts. For those who have any kind of questions regarding in which and also the best way to use [https://www.rhibusbar.com/ Taiwan RHI busbar], you can call us from the web-site. You have measured the maximum usable width and height of each section, you have acquired a suitable bus bar calculator for your application and the basic specifications for your components, and the only thing left is to do the evaluation. Aluminium bus bars are rated by their electrical current rating in amperes and you have the data for that too. The next step is the comparison with the other materials which are used in the industry and that is where the differentiation comes in. It is usually a bit confusing when it comes to the evaluation of bus bars because all these companies seem to have different specifications for their electrical bus ducts and they will all vary slightly in their pricing too.<br><br><br>The major specification which all the other companies will be quoting for their products will be their current rating in Amperes or Current Capacity (EC). The EC ratings are given in amperes and if the company quotes one that is close to the one you have measured then their equipment is probably overloaded. If they quote one slightly higher than the load required may just be perfect for your application but this will depend on the material the busbar is made from, the insulation of the insulator and the standard aluminium busbar sizing that is used. To complicate matters, there are some other factors such as the thickness of the insulator and the wire feed length which need to be taken into consideration.<br><br><br>The electrical rating is given in volts and amperes/hour. The modulus of elasticity is also indicated and this is in GPM or millions of pounds per cubic meter. It can be calculated by multiplying the two together:<br><br><br>The calculation is not too difficult once you have all the necessary information. For our example we simply need to know the minimum required conductor lengths:<br><br><br>The next step is to find the measured current density of conductors I and J. The measured current density is usually in milliamps/inches or amps/hr. We now need to find the cross-sectional area of the busbar and the required cable width. The measurement of the cross sectional area is usually in inches. The next step is to calculate the cable length in meters and get the resultant value of the required wire feed length:<br><br><br>The next thing we do is to find the equation of thermal expansion which is: c2 where T is the current density in the bus duct and S the minimum cross sectional area in the enclosure. This equation can be found easily from a spreadsheet software by entering the name of the manufacturer into the appropriate cell. After entering the name of the manufacturer, we can also enter the quantity of each conductor in the cell for calculating the total cable length:<br><br><br>Another calculation we can make using the spreadsheet program is to find the heat produced by the busbar in the given electrical current flowing through it. The input to this calculation is the current density times the wire feed rate in inches. The formula to solve the equation is: K s = T g where K is the total heat produced by the busbars in inches per second. Then we need to find the K factor, which is: K t = exp(K s /T g) where K s is the heat produced in liters per second by the metal conductor, K t is the total length of the cable in meters and T is the voltage of the cable in milliamps.<br><br><br>To get the value of the cable resistance in Ohm, we can also use another formula that is: K s /R s where K s is the resistivity of the busbar in hertz. Then we need to find the thermal expansion factor of the cable in hertz. The calculation is: T eff = K s /(R s *exp(R t)), where K s is the total length of the cable in meters and T of the calculated thermal expansion in hertz. Then we can compare the measured values for both the parameters and if they are not equal to one another, then we need to change them so that we get the value of the cable resistance in Ohm. And that's all there is to the calculation of cable resistance!<br>'