Intelligent leading low-voltage electrical technology upgrade

On October 28, the second China International Electrical Equipment Fair was held in Nanjing, Jiangsu. Many new low-voltage electrical products unveiled for the first time and have demonstrated their intelligent functions.

Opinion: The low-voltage electrical technology level is still to be greatly improved. Various new low-voltage electrical appliances on display at the 2nd China International Electrical Equipment Fair have made people see the relentless pursuit of low-voltage electrical companies for products with higher technological levels. However, judging from the shock brought about by these new types of low-voltage electrical appliances, after rethinking the entire industry, we will find that the technical level of the industry is still in urgent need of improvement.

Compared with developed countries, China's low-voltage electrical industry still has a considerable gap. First of all, the scale of the company is small and the number is excessive. More than 2,000 companies have eaten this market, resulting in too scattered resources and low utilization efficiency. Second, the regional structure converged and the repeated construction was serious. The phenomenon of industrial convergence in low-voltage electrical appliances in China is serious. Repeated construction at low levels has led to excess production capacity, low utilization of energy and raw materials, and low economic efficiency. Finally, China's low-voltage electrical appliance industry lacks a group of advanced technology and equipment, large-scale production, and good product quality. It lacks brand-name products that compete in the international market. There are also deficiencies in product design, durability, and environmental performance.

Improving the backwardness of the entire industry requires long-term efforts. There is a lot of work to be done, but there are several things that are more urgent.

First, the enthusiasm for adopting computer-aided design, auxiliary manufacturing, and analytical techniques is further promoted in the development and design of enterprise products. These technologies are the material basis for improving product standards and should allow more companies to recognize this.

Second, further increase investment in product research and development. According to the survey, the investment in the development of the low-voltage electrical industry in China is far behind that of well-known foreign companies, and individual areas are even more than 100 times. According to the information from the State Intellectual Property Office, foreign companies accounted for more than 80% of successful low-voltage appliance invention patent applications in recent years. There are not many low-voltage electrical products in China with independent intellectual property rights.

The international low-voltage electrical appliance market is becoming more and more fierce, and companies from all countries are increasing their input. Governments, industry associations, and enterprises should work together to further adjust the structure of low-voltage electrical products, eliminate backward products that are large in size, consume large amounts of energy, and pollute the environment, and realize multiple forms of joint development. In this way, there is hope for catching up with the international advanced level.

Related Links: Intelligent Performance of Low-Voltage Electrical Appliances Cao Mengzhou Ji Huiyu is Secretary-General of the National Committee of Standardization of Low-Voltage Electrical Appliances. At present, one of her main tasks is to formulate intelligent standards for low-voltage electrical appliances. She said that if low-voltage electrical appliances want to reflect the intelligent characteristics, they must meet the requirements of excellent performance, reliable operation, small product size, modular design, communication, energy saving and environmental protection.

The market needs high-performance, intelligent low-voltage electrical products, which means that low-voltage electrical products must have the functions of protection, monitoring, communication, self-diagnosis, and display. This is necessary to realize the intelligentization of the power grid; it can communicate and require products with communications. The interface can communicate with various open field buses in two directions to realize the communication and networking of the system. With reliable operation, it indicates that product reliability design must be carried out, and reliability control, reliability factory inspection, etc. must be performed in the production process, especially to meet the requirements. Electromagnetic compatibility requirements. As for environmental protection and energy conservation requirements, it means that low-voltage electrical appliances must be “green” products, which can significantly reduce the environmental impact of materials selection, manufacture, and use.

On October 28, the 2nd China International Electrical Equipment Fair, jointly organized by the China Electrical Appliance Industry Association and the Nanjing Municipal Government, was opened in Nanjing.

The year 2010 is a crucial year for the low-voltage electrical industry in China to reach a low point. This year, electric power construction entered a period of high development, the rise of smart grid construction, the promotion of low-carbon economy and energy-saving emission reduction projects, and opened a new round of large-scale investment in the power industry.

Against this background, new technologies and new products featuring intelligent functions and the concept of new energy have attracted attention at this exhibition.

Intelligent elements of low-voltage electrical appliances With the development of electrical construction and the construction of smart grids, low-voltage electrical appliances with intelligent functions are increasingly valued by suppliers of residential electrical distribution systems. At the exhibition site, there are many smart low-voltage electrical products unveiled.

Fata Electric (Jiangsu) Co., Ltd. exhibited FTB1 with a selective protection of small circuit breakers, is a typical representative of smart low-voltage electrical appliances.

The staff of the company stated that the FTB1 was jointly developed by Fateh Electric Appliances and the Shanghai Electric Apparatus Science Research Institute, etc., and has full independent intellectual property rights. The product belongs to the fourth generation of low-voltage electrical appliances, filling the gap in the field of selective protection for low-voltage terminal distribution systems in China. It not only has high breaking capacity and small product size, but also has selective protection and intelligent communication functions to meet intelligent buildings and The use of intelligent terminal distribution circuit system.

The same intelligent function also includes the VW60 new-generation intelligent low-voltage frame circuit breaker developed by Blatt Precision Electric Co., Ltd.

"In 2008, Baili Electric cooperated with Shanghai Institute of Electrical Science and Changshu Switch Manufacturing Co., Ltd. to initiate the development of the intelligent low-voltage frame circuit breaker. This year, the product passed the technical appraisal organized by the China Machinery Industry Federation. Mass production will soon be possible," said Liang Yan, chief engineer of Baili Electric.

It is understood that VW60 universal low-voltage circuit breaker products have the characteristics of small size, strong short circuit performance, novel operating mechanism and high level of field bus technology. The successful development of this product can promote the development of intelligent low-voltage power distribution and electronic control switchgear, thus promoting the intelligentization of distribution network.

From traditional power distribution: Extending to the new energy sector In addition to intelligence, the concept of new energy has also attracted a number of domestic low-voltage electrical appliance companies, and some companies have made breakthroughs in R&D for new energy power generation accessory products.

The PV array DC lightning arrester box independently developed by Shanghai Noytec Electric Co., Ltd. adopts a box with IP65 protection class, and is equipped with a dedicated high voltage circuit breaker, lightning protection device and fuse for photovoltaics, and optimizes the design of the cable. The maximum photovoltaic open-circuit DC voltage can reach 1000 volts, and the maximum current of each circuit can reach 10 A, thus providing a safe and stable protection for the photovoltaic system.

Tang Jie, the senior manager of NOAA East China, is very confident in the quality of his products: “We are the only Chinese company that has achieved production of 660 to 1,000 volts, and the quality can be comparable to foreign brands.” Tang Jie said that at present, the product has been in photovoltaics in Ningxia. The project was applied and achieved good results.

Compared with the sudden emergence of new enterprises, Beijing People's Electric Factory Co., Ltd., which has nearly 20 years of experience in the development, production, and operation of DC circuit breakers, has long taken root in the new energy field. The company exhibited a photovoltaic string reverse current protection and power direct current selective solution with a breaking capacity of 20 kA, which has won unanimous recognition from the industry. As of May of this year, 300 grid-connected solar power stations for its molded circuit breakers for photovoltaic systems have been used in the Mainland.

In the face of new achievements and new technology trends in the low-voltage electrical market, Lu Yanyi, the Honorary President of the China Electrical Equipment Industry Association, believes that: “The country’s policy to accelerate the development of strategic emerging industries requires that the electrical and electronics industry must accelerate industrial restructuring and transform its economic development model. Building a smart grid is a very rare opportunity. Electric companies should seize this opportunity to get rid of low-tech market competition as soon as possible and achieve a transformation to high-end equipment manufacturing.”