The low-voltage switchgear can meet the position that each electrical component is reliably fixed in the cabinet. Guangdong Ziguang Xiaobian observes the cabinet from the appearance. The shape of the cabinet is generally cubic, such as screen type, box type, etc., and also has a prismatic body such as a table top. This type of cabinet has a single row and is also arranged. In order to ensure the shape and size of the cabinet, the low-voltage switchgear often adopts a step-by-step combination of various components. Generally, it is composed of two pieces or two sides, and then forms a cabinet, or first meets the shape requirements, and then connects the cabinets in turn. Pieces. The lengths of the parts that make up the edges of the cabinet must be correct (the tolerances are negative) in order to ensure the geometric dimensions of all aspects, thus ensuring the overall shape requirements. Guangdong Ziguang Xiaobian feels that for both sides of the cabinet, it is necessary to consider the arrangement, and there should be no bulging in the middle.
In addition, from the perspective of installation, the low-voltage switchgear cannot have a sag on the bottom surface. In the arrangement and installation, the foundation leveling is a prerequisite, but the dryness and the cabinet itself have certain errors. In the arrangement, the lateral difference should be offset as much as possible, without causing the difference to accumulate, because the difference accumulation will cause the cabinet to deform. It affects busbar connection and component assembly eccentricity, stress concentration, and even affects the life of electrical appliances. Therefore, in the arrangement, the highest point of the foundation should be used as the installation reference point, and then the step should be gradually expanded. Under the condition that the dryness of the bottom surface is ideal and predictable, the method of expanding from the middle to the sides can also be adopted to make the accumulated difference cloth.
For easy adjustment, the tolerance accumulation is offset and the cabinet width tolerance is taken as a negative value. After the assembly of the various components of the cabinet is completed, it should be shaped as needed to meet the dimensional requirements of each part. For the manufacture of cabinets with large or large batch size, the fixtures should be fully considered to ensure the correct and uniform structure. The reference surface of the fixture is to be taken from the bottom surface. The positioning blocks in the fixture are arranged to facilitate the work. The outer door of the cabinet is affected by transportation and installation, and is generally adjusted during installation.