Knowledge for Selecting Copper Bars (Main Bars and Branch Bars): The length that improves yield rate is the key!
【Before】 The criteria for selecting copper bars during the design of distribution boards and control panels is based on the current capacity (A) flowing through them, which tends to give the most consideration to the cross-sectional area (width × height). As a result, the "length" of the copper bars is often less considered, leading to an increase in the overall cost of the panel. In particular, the copper bars connected to the main breaker have a relatively large cross-sectional area and require three bars for a three-phase system, making it necessary to optimize the "length" of the copper bars themselves. 【After】 By understanding the "length" dimensions of standard raw material (at the time of purchase) copper bars, it becomes possible to design the optimal "length" for the copper bars. Especially when copper bars longer than 600mm are required, it becomes difficult to obtain the three necessary copper bars for a three-phase system from a single raw material copper bar. By considering the number of bars obtained and the yield rate from the design stage, the cost of conventional copper bars has been reduced by one-fourth. *For more details, please refer to the catalog or feel free to contact us.*
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**Effect** Panel manufacturers that produce control panels and distribution boards cut copper bars from raw materials for use. The standard lengths of commercially available copper bars are 1000mm, 1250mm, and 1660mm. By designing the copper bars used for the main breaker to be of a length that improves yield and allows for three pieces to be obtained, significant cost reductions for copper bars can be achieved, leading to lower costs for control panels and distribution boards. *When using copper bars longer than 600mm, selecting the length based on the number of pieces that can be obtained and the yield rate will contribute to cost savings.* *For more details, please refer to the catalog or feel free to contact us.*
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For more details, please refer to the catalog or feel free to contact us.
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Hoshimoto Co., Ltd. is a manufacturer that has been producing and selling industrial handles, locks, hinges, grips, copper busbars, and press, cutting, and casting processed products since its establishment. Leveraging the characteristics of manufacturing and sales, we are committed to product development with the motto of creating what is needed. In addition to standard catalog items, we also respond to the production of custom processed products based on our available equipment (press machines, benders, NC lathes, machining centers, headers, zinc die casting machines, milling machines, etc.) as needed. We have obtained ISO 9001:2000 and ISO 14001 certification.