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What should pay attention for low voltage switchgear?

Nov 29, 2018
Gck Low Voltage Withdrawable Switchgear.jpgIn order to ensure the shape and size of the cabinet, the low-voltage switchgear often adopts a step-by-step combination of components. Generally, two pieces or two sides are formed first, then the cabinets are formed, or the shape requirements are met first, and then the inner branches of the cabinet are connected in sequence. Pieces. The lengths of the parts that make up the edges of the cabinet must be correct in order to guarantee the geometric dimensions of all aspects, thus ensuring the overall shape requirements. For the two sides of the low-voltage switchgear, due to the need for alignment, there should be no bulging in the middle.

From the perspective of installation, the bottom surface of the low-voltage switchgear 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, when the low-voltage switchgear is arranged, the highest point of the foundation should be used as the installation reference point, and then the step-by-step positive expansion should be carried out. Under the condition that the dryness of the bottom surface is ideal and predictable, the expansion from the middle to the sides can also be adopted to accumulate. The differences are evenly distributed.

In order to facilitate adjustment and offset tolerance accumulation, the low-voltage switchgear 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 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.