What is the importance of the low voltage switchgear?

The main function of low voltage switchgear is to open and close, control and protect electrical equipment during the process of power generation, transmission, distribution and electrical energy conversion in the power system. The interior is mainly composed of circuit breakers, isolating switches, load switches, operating mechanisms, mutual inductors, and various protection devices.

What are the advantages of fastener-connected low voltage switchgear?

What are the technological characteristics of the fastener-connected low voltage switchgear?

What should we do if the welding-type low voltage switchgearis deformed?

What are the advantages of fastener-connected low voltage switchgear?

The advantages of the fastener-connected low voltage switchgear are that it is suitable for pre-plating the workpiece, easy to change and adjust, easy to beautify, and the parts can be standardized design, and can be pre-production inventory, and the frame size error is small. The disadvantage is that it is not as strong as welding, requires high precision of parts and components, and the processing cost is relatively increased. Fasteners are generally standard parts, and their types mainly include conventional screws, nuts and rivets, pull rivets, as well as pre-tightened and fine-adjustable clamp nuts and pre-tightened tension nuts, as well as self-tapping screws. There are also special fastening screws.

What are the technological characteristics of the fastener-connected low voltage switchgear?

Fastener-connected low voltage switchgear is shaped by fixtures, positioned by tooling, and equipped with pressure washers if necessary; riveting is generally equipped with drills, and the pre-plated parts should prevent the coating from being damaged; for those processed with precision machining centers or special equipment For components, if the connecting aperture and the diameter of the fastener can maintain a slight gap, they can be assembled without clamps and formed at one time; for the fastening of the guide and positioning parts, the special measuring tools should be used to first locate and then use standard tooling to test.

What should we do if the welding-type low voltage switchgear is deformed?

The post-welding deformation of the low voltage switchgear is caused by the stress caused by the expansion of heated molecules at the welding place during welding and the microscopic displacement caused by extrusion, which cannot be reset after cooling. In order to overcome the influence of deformation, the shaping process must be considered. Shaping methods generally include:

① Predict the deformation range of the low voltage switchgear through experiments, and force the workpiece to deform in the opposite direction before welding, so as to reach the predetermined size after welding;

② Correction after welding with positive method;

③The relatively contracted part after hitting and pressure welding, and the stress balance is obtained;

④The relatively loose convex part after heating and welding can achieve the same shrinkage as the welding part;

⑤ If necessary, heat the components as a whole.

In addition, welding point selection, welding seam direction, welding sequence, and spot welding positioning have a certain influence on post-welding deformation. If handled properly, deformation can be reduced, but this depends on the specific conditions of the low voltage switchgear.

With the development of science and technology, the low voltage switchgearis used more and more widely in the power industry, chemical fiber industry, light industry, and metallurgical industry. Zhejiang Zhegui Electric Co., Ltd commits to providing perfect service for every customer from all countries.