There are three major problems with low-voltage switchgear

[Three major problems with low-voltage complete switchgear]: After entering the 20s, due to the increase in infrastructure and electric power investment, the low-voltage complete switchgear industry began to have a large development space, and the market demand increased year by year, stimulating the development of the industry, which is reflected in the large increase in manufacturers, the acceleration of product renovation, the increase in variety, and the standard of products...

After entering the 20s, due to the increase in infrastructure and electric power investment, the low-voltage complete switchgear industry began to have a large development space, and the market demand increased year by year, stimulating the development of the industry, which is reflected in the large increase in manufacturers, the acceleration of product renovation, the increase in variety, and the standard of products is gradually approaching the standard.

Low-voltage complete switchgear is responsible for the control, protection, measurement, conversion and distribution of electric energy in the low-voltage power supply system. Since low-voltage complete switchgear is used in production sites, public places, residential houses and other places, it can be said that all places where electrical equipment is used should be equipped with low-voltage equipment. About 80% of my country's electric energy is supplied by low-voltage complete switchgear. The development of low-voltage complete switchgear stems from the material industry, low-voltage electrical appliances, processing technology and equipment, infrastructure construction and people's living standards. Therefore, the level of low-voltage complete switchgear reflects a country's economic strength, science and technology, and living standards from one aspect. Before the 1970s, my country's low-voltage complete switchgear was basically in a stagnant state, mainly reflected in the single variety of products, poor quality, low technical parameters, backward process equipment, long-term unchanged product types and backward standards (there was only one standard JB617 at that time). After entering the 1980s, due to the increase in infrastructure and power energy investment, the low-voltage complete switchgear industry began to have a large development space, and the market demand increased year by year, stimulating the development of the industry, which was reflected in the large increase in manufacturers, the acceleration of product renovation, the increase in varieties, and the gradual approach of product standards to standards. The technical performance parameters of products have been significantly improved, and the processing technology and equipment of factories have been significantly improved. Hundreds of manufacturers have introduced foreign CNC sheet metal processing equipment, and some factories also have flexible processing lines, and their sheet metal processing technology has reached the level. In addition, a number of profile and cabinet production plants and electrical accessories production plants have emerged in the industry.

1. Low-voltage complete switchgear

At present, the manufacturers of low-voltage power distribution products in my country are mainly distributed in East China, South China, and North China, especially in Jiangsu, Zhejiang, Guangdong, Fujian, and Beijing-Tianjin. These regions have rapid economic development, and their production capacity and product level are relatively high. In the northwest and northeast regions, except for individual enterprises, the overall level is relatively poor.

At present, there are more than a dozen types of power distribution equipment developed by my country, including fixed panel type, fixed partition type, draw-out type, mixed type, intelligent type, etc. The product design level has reached the level of the mid-1990s.

2. Bus duct products

The processing and production technology of bus duct products is relatively simple, so generally all manufacturers that can produce low-voltage complete switchgear can produce bus ducts, and there are also some manufacturers that specialize in producing bus ducts. Due to different economic conditions in different regions, the distribution and output value of enterprises are also very different. In coastal and economically developed areas, bus duct production enterprises started earlier, developed faster, and the number is larger. For example: Jiangsu, Zhejiang, Shanghai, Guangdong and other places, but because the technical content of this product is not high, the requirements for the factory's process and processing equipment are also relatively low, coupled with low investment and quick results, the strength of manufacturers is uneven, which is reflected in the considerable gap in product quality. In general, the level of bus duct products in my country (except for individual joint ventures) is still far behind foreign products.

3. Existing problems

Although my country's low-voltage complete switchgear has greatly improved in terms of output and output value, the product variety and performance are far from meeting the market demand. On the one hand, there is fierce competition between several types of products, and on the other hand, some product markets are occupied by foreign manufacturers.

According to analysis by industry experts, the main problems in my country's low-voltage switchgear industry are as follows:

(1) The product structure is not reasonable enough.

Low-voltage switchgear should have the characteristics of multi-level and multi-variety. The so-called multi-level means that similar products should have high, medium and low differences in technical performance, parameters, functions, structures, installation, etc. to meet the needs of different industries. Multi-variety means that products that meet the needs of different use environments, such as moisture-proof, dust-proof, anti-corrosion, waterproof and other products that are used in-depth on-site. Most of the products that my country can currently supply are still products used in general environments. Fixed-interval products with higher parameters, high protection levels, high automation and multi-function products are basically blank.

(2) The independent development capabilities of enterprises are poor. The characteristics of the industry are that there are many manufacturers, but few large-scale ones. Most manufacturers have weak technical strength and do not have the ability to independently develop products. Basically, they produce through industry technology transfer or imitation. Therefore, product types are concentrated and market competition is fierce. Although a few enterprises have the ability to develop products on their own, due to the long market opening cycle and various difficulties, once a certain market scale is formed, other factories can easily imitate and enter the market, which seriously affects the enthusiasm of enterprises to develop products on their own.

(3) The difference in product quality is not large, and there are no famous brand products. In order to improve the processing and product quality of enterprises, many manufacturers have introduced high-precision sheet metal processing equipment, but they are relatively backward in assembly technology, busbar processing technology and equipment. The enterprises are at the same level. In addition, several popular products in China currently have profile manufacturers, auxiliary parts manufacturers, and even shell manufacturers. In order to shorten the production cycle and adapt to the needs of the diversified market, many enterprises directly purchase shells for assembly. In this way, even with high-precision sheet metal processing equipment, it is difficult to play the advantages. In this case, it is difficult to produce high-quality brand products.

(4) The main problems of low-voltage complete switchgear itself:

① Materials used in low-voltage complete switchgear:

At present, there are many low-voltage complete switchgear accidents in China due to unqualified flame retardancy of insulating materials.