The hottest standardization and industrial develop

Editor's note: low voltage electrical appliances are the basic components of the machinery industry, and the performance and quality of their products directly affect the reliable operation of power systems and industrial control systems. As one of the basic industries of the national economy, low-voltage electrical appliance industry is an important part of the national economy. According to statistics, more than 80% of electric energy is distributed to electrical equipment through low-voltage appliances. With the construction of smart electricity in our country, low-voltage electrical appliances, as an essential electrical component for user end distribution, will play a more important role

excellent paper on standardization and industrial development in the Yangtze River Delta

in China in the 21st century, technology, economy and standardization are increasingly closely linked. The progress of technology and the development of production are not different. There is a close relationship between the development of global standards, because the latter ensures the universality and interchangeability of the former. The development and changes of technology and economy also promote the change and development of standardization activities. Standardization plays an increasingly important role in the world's technological and economic life

modern standardization reflects the needs of enterprises and markets. Various professional technical standards have become the technical basis for enterprises to organize the production and inspection of products, and also an important basis for countries to set up technical barriers to restrict the import of products from other countries. With China's accession to the WTO and the globalization of economy and technology, Argo will be able to provide convenient financial services for 'partners' to develop rapidly. Standards play a decisive role in improving the competitiveness of our products in the world, promoting international trade and reasonably protecting our market

low voltage electrical appliances are the basic components of the mechanical industry. The performance and quality of their products directly affect the reliable operation of power systems and industrial control systems. As one of the basic industries of the national economy, low-voltage electrical appliance industry is an important part of the national economy. According to statistics, more than 80% of electric energy is distributed to electrical equipment through low-voltage appliances. With the construction of smart electricity in our country, low-voltage electrical appliances, as an essential electrical component for user end distribution, will play a more important role

I. current situation and characteristics of low-voltage electrical appliances industry

low voltage electrical appliances are used for making and breaking, controlling or protecting circuits with AC voltage up to 1000V and DC voltage up to 1500V. They are important electrical components for power distribution, control and protection circuits and electrical equipment in low-voltage systems. The low-voltage distribution system is mainly composed of various low-voltage electrical components. The function and performance of low-voltage electrical components determine the performance and reliability of the complete equipment. According to statistics, for every 10000 kW of power generation equipment added, about 40000 low-voltage electrical components are required to match it. In industrial automation system, all kinds of control equipment composed of low-voltage electrical appliances are needed for protection and control

in recent years, great changes have taken place in China's low-voltage electrical appliance industry, and technological progress continues to promote the development of the industry economy. The development of low-voltage electrical products in China can be roughly divided into the following stages:

the comprehensive imitation of the Soviet Union in the 1950s

in the 1960s and 1970s, the first generation of unified design products were completed on the basis of imitation

in the 1980s, the second generation products were completed on the basis of upgrading and introducing foreign advanced technology

the third generation of low-voltage electrical appliances developed by tracking foreign new technologies in the 1990s

the fourth generation of intelligent communicable high-performance electrical products that have recently been independently innovated and developed

the fourth generation products have the characteristics of excellent performance, reliable operation, small size, combination, modularization, communicable, intelligent, etc. the technical performance has reached or approached the current advanced level, and individual technical performance indicators have surpassed foreign products

China's low-voltage electrical appliance manufacturing enterprises are mainly concentrated in Zhejiang, Shanghai, Jiangsu, Beijing, Tianjin, Guangdong and other places. The Yangtze River Delta region accounts for more than 70%, and the level of economic development has also reached a new level. According to the statistical data of the low-voltage electrical appliance industry of the general low voltage branch of the China Electrical Appliance Industry Association in 2008, the low-voltage electrical appliance industry has maintained a steady and healthy development trend, and the economic operation efficiency and operation quality remain good. In 2008, the total industrial output value of the whole industry was more than 40 billion yuan, the total import and export trade was 3.631 billion US dollars, and the export volume was 1.807 billion US dollars, an increase of 21.11% year-on-year. In recent years, some advantageous enterprises in the industry have always been able to rely on scientific and technological progress to ensure the steady development of enterprises. These enterprises attach importance to the strategy of developing technical standards like gel. Many indicators of the internal control standards of enterprises' products are higher than the indicators of relevant national standards and industrial standards. They have always been a high starting point for technological transformation, and the comprehensive index of industrial economic benefits ranks among the top

the production of low-voltage electrical appliances industry in China is relatively scattered, with more than 1500 production enterprises, mainly small and medium-sized Chinese Windows software enterprises with powerful functions. The technical level of enterprises is uneven, and the system supporting capacity is poor. Since most products are produced through technology transfer and promotion after unified design, product homogenization is serious, and there are few enterprise characteristic products. Although the output is huge, compared with developed countries, China is still a large manufacturing country rather than a powerful country. China's power industry is still in the development stage, and the demand for low-voltage electrical appliances is still growing. According to the empirical matching ratio of installed capacity and electrical components, about 480000 low-voltage frame circuit breakers and 4.82 million molded case circuit breakers are required every year, and the demand for other types of low-voltage electrical appliances is also considerable. It can be predicted that the market capacity of low-voltage electrical appliances in China will grow steadily

II. Standardization of low voltage apparatus

1 Low voltage electrical appliance standard system

after more than 50 years of development, China's low voltage electrical appliance industry has formed a relatively complete system from the aspects of enterprises, products, standards, testing and so on. The standard system of low-voltage electrical appliances in China is based on the IEC (International Electrotechnical Commission) system, and has been in line with IEC standards since the 1990s. The national standards for low-voltage electrical appliances are basically based on the same, modified and adopted international standards and foreign advanced standards. At the same time, a number of independent and innovative technical standards in line with China's development reality have been formulated in combination with China's actual situation, such as geographical environment differences, technological development and application. At present, there are 62 national standards and 38 industrial standards in China's low-voltage electrical appliance industry. The release and implementation of these standards can provide enterprises with the basis for design, production and certification, and can better meet the market demand and the needs of national economic development

2. Standardization development of low-voltage electrical appliances

⑴ situation of existing professional technical committees

China's low-voltage electrical appliances industry currently has four national technical standardization committees and one sub Technical Committee, with the Secretariat located in Shanghai Institute of electrical Sciences (Group) Co., Ltd. (hereinafter referred to as Shanghai Electric Power Science and Technology)

the National Technical Committee for standardization of low voltage electrical appliances (sac/tc189) is mainly responsible for the standards of low voltage distribution and control appliances, household circuit breakers and similar equipment, and the corresponding technical fields of iec/sc17b low voltage switchgear and control equipment, iec/sc23e household circuit breakers and similar equipment.; The National Technical Committee for fuse Standardization (sac/tc340) is mainly responsible for fuse standards, corresponding to iec/tc32 fuse field; The low-voltage fuse sub Technical Committee of the national fuse Standardization Committee is mainly responsible for formulating the low-voltage fuse standard, which corresponds to the technical field of iec/sc32b low-voltage fuse; The National Technical Committee for standardization of network communication interface of electrical equipment (sac/tc411) is mainly responsible for the communication protocol, communication protocol and other technical fields between electrical equipment and network; The National Technical Committee for standardization of low voltage equipment insulation coordination (sac/tc417) is mainly responsible for the theoretical research and application standards of low voltage insulation coordination, and the technical field of iec/TC109 low voltage equipment insulation coordination

these professional and technical committees have played a great role in the research and participation of international standards, the research and dissemination of cutting-edge trends in product technology development, the preparation and revision of national standards and industrial standards, the publicity and implementation of standards, the supervision and implementation of standards, and technical consultation. As the Secretariat undertaking unit of the above-mentioned Standardization Committee, CETC has long undertaken the standardization of low-voltage electrical appliances in China. The current more than 100 national and industrial standards, most of which are prepared and revised by CETC, have led the development of China's low-voltage electrical appliances industry in terms of standardization research, technological innovation, product research and development at home and abroad, and have high prestige in the industry

⑵ standardization of low-voltage electrical appliances

① standard preparation and revision work

as a platform for technology accumulation, technological innovation achievements

diffusion and improving the efficiency of technological innovation, standard preparation and revision work is an important part of standardization work. Formulating and implementing standards is essentially a process of popularizing and applying advanced technology, digesting and absorbing advanced technology, and improving the ability of independent innovation. As the undertaking unit of the Secretariat of Shanghai Standardization Committee, Shanghai Electric Power Technology Co., Ltd. closely adheres to the development needs of the industry, adheres to the long-term goal of providing high-quality standardization services for Shanghai and the Yangtze River Delta, and adheres to the principle of taking enterprises as the main body and highlighting the participation of enterprises, and leads enterprises in the industry to carry out a series of standard formulation and revision work with emphasis. In 2008 alone, Shanghai Electric Power Technology Co., Ltd. undertook the formulation and revision tasks of 32 national standards, More than 40 low-voltage electrical appliance enterprises, especially those in the Yangtze River Delta region, have been organized to participate in the preparation and revision of the standards, and a number of high-level standards that can reflect the core technology of low-voltage electrical appliances and meet the development needs of the low-voltage electrical appliance industry have been completed

② special research work on technical standards

all standards committees of low-voltage electrical appliances have always paid attention to the research work on common technologies, basic standards and independent technical standards of low-voltage electrical appliances, and have focused on carrying out a series of special research work on the standardization of high-end products. It is reported that in recent years, the leading low-voltage electrical appliance enterprises represented by CETC have also vigorously participated in the special research on technical standards on the premise of maintaining their own leading technology and standardization. For example, the key technology development and industrialization project of new electrical appliances - Fieldbus electrical appliances and Fieldbus low-voltage electrical appliances is a key project undertaken by the Ministry of science and technology, the economic and Trade Commission, the Shanghai Municipal Science and Technology Commission, and the Shanghai Municipal Economic and Trade Commission. The project has researched and developed a number of intelligent communicable low-voltage electrical appliances, greatly expanding the functions of traditional low-voltage electrical appliances, and promoting the overall development of low-voltage electrical appliances in China to be intelligent, networked, and communicable, It laid the foundation for the comprehensive development of the fourth generation of low-voltage electrical appliances in China and completed the formulation of three national standards in the series of gb/t18858 "low voltage switchgear and control equipment controller equipment interface". At the same time, it has carried out and completed three special studies on technical standards of Shanghai Science and Technology Commission, including motor protector standard and research based on fieldbus technology, field bus conversion interface standard and research, and electric quantity monitor standard and research based on fieldbus technology. Through the analysis of the characteristics of communicable appliances, the research on communication protocols and test methods, and a large number of test demonstrations, it has formulated three industry standards, It has established a multi-level standard system for communicable low-voltage electrical appliances in China, including bus protocol, communication protocol, system supporting products, etc., filling the domestic gap and reaching the international advanced level. The project has won the first prize of Shanghai Science and Technology Progress Award and the first prize of machinery industry science and technology progress award. At present, Shanghai Electric Power Technology Co., Ltd. has gradually formed a high-tech development plan with communication appliances as the main line and independently developed patented technology as the leading