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How to Divide the High and Low Voltage Switchgear from the Structural Form?

Aug. 23, 2019
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As a Low-voltage Power Distribution Cabinet Factory, let's talk about how to divide the high and low voltage switchgear from the structural form.

(1) Fixed type: It can meet the position that each electrical component is reliably fixed in the high and low voltage switch cabinet. The shape of the cabinet is generally a cube, such as a screen type, a box type, etc., and a prismatic body such as a tabletop. This type of cabinet has a single row and is also arranged. In order to ensure the shape and size of the high and low voltage switch cabinets, the stepwise combination of the components is often adopted. Generally, two pieces or two sides are formed first, and then the cabinets are formed, or the shape requirements are first met, and then the cabinets are connected 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. For the two 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 bottom surface cannot be sunken. 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 side can also be adapted to make the accumulated difference cloth. For easy adjustment and offset tolerance accumulation, the Low Voltage Switch Cabinet width tolerances are negative. 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 high and low voltage switch 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. For the external doors of the cabinet, etc., due to the vulnerability to transportation and installation, it is generally adjusted during installation.

High Voltage Switch Cabinet

High Voltage Switch Cabinet

(2) Withdrawal type: The withdrawing type is composed of a fixed high and low voltage switch cabinet and a movable device part equipped with main electrical components such as switches. The movable part is lightly moved when moving, and the positioning is reliable after moving in, and the same type and The drawers of the specifications can be reliably interchanged, and the processing method of the high and low voltage switch cabinets in the draw-out type are basically similar to that of the fixed medium cabinet. However, due to the interchange requirements, the accuracy of the cabinet of the High Voltage Switch Cabinet must be increased, and the relevant part of the structure should have sufficient adjustment. As for the movable part, it is necessary to replace and reliably carry the main components. Therefore, to have higher mechanical strength and higher precision, the relevant part must have sufficient adjustment.