Copper bar processing: The necessary tools for copper bar manufacturing shall be prepared for copper bar processing to reduce the manufacturing error of copper bar. The calculation of copper bar blanking makes full use of Pythagorean theorem. In the calculation of copper bar, pay attention to adding or subtracting the thickness of copper bar to reduce manufacturing error. Copper bar blanking shall consider the reasonable direction of copper bar in the cabinet. The main bus copper bar blanking calculation shall make full use of the cabinet decomposition line. For the calculation of copper bar, pay attention to whether the measuring tape is measured from 100mm, and the error of 100mm shall be reduced during the calculation. Copper bar blanking shall consider whether there is waste discharge available. Gloves shall be worn for processing copper bars to prevent oxidation of copper bars. Copper bar punching shall be proofed and punched. The square used to draw the line of the copper bar shall be close to the copper bar. The minimum bending distance of the copper bar machine shall be considered to be 50mm for the bending of the copper bar. Bus arrangement (facing the panel, subject to the business direction of the cabinet). A. B, C, (yellow, green, red) phases are arranged from top to bottom; From inside to outside; From left to right, n rows of zero bus and PE rows of ground bus are under the cabinet, the ground wire is in the front and the zero wire is in the back. The distance between phases shall be kept above 20mm, and partitions shall be used for isolation below 20mm. Bus fixings shall meet 3C requirements. The layout in the main bus bar cabinet shall be as simple and smooth as possible, and the bending shall be consistent. The bending shall be more beautiful at 30mm from the connecting row.
As the incoming line of the cabinet body, the on-site bus bar is the incoming line on the cabinet body. The incoming end of the frame circuit breaker shall be led out of the cabinet top for 200mm to facilitate the connection of the on-site copper bar, and the N-BAR shall also be led out. As the incoming line of the cabinet body, the field cable is the incoming line under the cabinet body. The incoming end of the frame circuit breaker shall be led downward, and the phase to phase wiring distance of the outgoing copper bar shall be greater than 50mm to facilitate the field cable connection. The number of cable connection holes shall be determined according to the rated current ampere of the frame circuit breaker, and one hole shall be punched every 500A, such as four holes at 2000a. The hole diameter shall not be greater than 1 / 2 of the width of the copper bar. The processing shall ensure that the position is correct, vertical and not skewed. The error of the distance between the holes shall not be greater than 0.5mm. The bending angle of copper bar shall not be less than 90 °. After forming, there shall be no crack or wrinkle at the bend, and the unevenness shall not be greater than 1mm. Rectangular copper bars shall be cold bent instead of hot bent. The right angle bending of copper bar shall be reduced, and there shall be no cracks and significant wrinkles at the bending; The bending degree of multiple busbars shall be consistent.
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