Relevant regulations on production, installation a

Discussion on relevant regulations and specified standards for the production, installation and operation of residual current operated protectors

Abstract: among the nine national regulations on the production, installation and operation of leakage protectors, GB, GB and SD need to be supplemented are mainly discussed

key words: Discussion on the standard of Residual Current Operated Protector since 1982, the national and ministerial standards on the production, installation and operation of residual current operated protectors are as follows: 1 General requirements for residual current operated protectors GB (before revision in 1995, it was leakage current operated protectors GB) 2 Code for rural installation and operation of leakage protector SD 3 Leakage protector installation and operation GB 4 Residual current operated protectors without overcurrent protection for household and similar purposes GB 5 Residual current operated protectors with overcurrent protection for household and similar purposes GB 6 Mobile residual current protector JB 7 Residual current protection relay JB 8 DL Chapter IV leakage protection 9 of technical code for rural low voltage power The above four national standards and five ministerial standards on residual current operated protectors were formulated, issued and implemented successively in the 1980s and 1990s. These standards include relevant provisions on production, installation and operation, which play a very important role in the development of residual current operated protectors that should not cause the plug to loosen when the computer is moving, and fill the technical gap in this regard in our country. It has played a good role in improving the level of safe power consumption in China for a long time. The rapid development of industrial and agricultural production after the Third Plenary Session of the Eleventh Central Committee of the Communist Party of China has led to a large increase in electrical equipment and household appliances, which has brought about the contradiction with the safe use of electricity. According to incomplete statistics, thousands of people were injured or killed in electric shock accidents every year in the mid-1970s. In 1975, the death toll of electric shock in China was as high as 6000, with an average of 2.87 people/10 million KW · h according to the statistics of power consumption. Electric shock fatalities accounted for a considerable proportion of all kinds of casualty accidents. At that time, compared with advanced countries and developing countries, China's safe use of electricity was at a low level. From the analysis of various reasons, most of them lack the knowledge of safe electricity use and the protective devices of electrical equipment are not perfect. Secondly, from the analysis of fire accidents, it can also be seen that electrical fires caused by improper use of electrical appliances or line leakage account for more than 20% of fire accidents. In the face of the severe situation of safe use of electricity, the practice at home and abroad has proved that the installation and use of residual current action protector has obvious effects on preventing electric shock casualties, avoiding fire accidents caused by grounding fault damage and leakage of equipment, and reducing electric energy loss caused by inaccurate inspection results caused by leakage. In the 10 years from 1976 to 1985, residual current operated protectors were popularized in economically developed rural areas and cities in the southeast coastal areas in order to meet the needs of safe power consumption, thus reducing energy consumption, forming a situation of mass production, installation and use. According to incomplete statistics, at present, more than 30 million residual action current protectors have been installed in rural electricity, and by 1998, the number of rural electric shock deaths had dropped to 167. However, in the previous period, due to the lack of mature technical conditions, corresponding production conditions, and complete technical standards as a basis, there were many problems in the product quality of residual current operated protector. At that time, China was in the early stage of reform and opening up, and many enterprises saw the development prospect of this emerging product and flocked to it, which once made it difficult for the country to control the product quality, In addition, users lack knowledge of installation and operation, resulting in individual regions and units in the wrong wiring or installation of unqualified products, failed to receive the expected effect, which greatly affected the promotion and development of residual current operated protector. In order to change this situation as soon as possible, the State Bureau of technical supervision (the former State Bureau of standards) and the former Ministry of water resources and electric power have begun to formulate a series of technical standards and procedures related to the production, installation, operation and management of residual current operated protectors since 1986, especially the mandatory national standards, which are aimed at unifying production technical requirements, standardizing production order and market management, correctly selecting, installing The use of residual current action protector plays a guiding role, and contributes to reducing personal electric shock accidents, preventing equipment damage accidents, and improving the level of safe power consumption. Based on the actual implementation over the years, the following are some exploratory comments on the above standards and regulations. 1. General provisions for residual current operated protectors GB from the late 1970s to 1980s, due to the need for safe power consumption, a large number of manufacturers of residual current operated protectors emerged. At that time, there was no unified production technology standard in the country, so it was difficult for some small-scale manufacturers to ensure product quality, resulting in electric shock casualties in some regions and departments after installing residual current operated protectors. In 1984, the investigation team of several ministries and commissions organized by the state, based on the investigation of provinces and cities across the country, believed that if the production quality of residual current operated protector was not grasped, the further development of Residual Current Operated Protector would be hindered. Therefore, in 1984, the former National Bureau of standards commissioned Shanghai Electric Appliance scientific research institute and other units to compile the leakage current operated protector GB, which was later revised in 1995, The standard adds the technical standard of circuit breaker from the general provisions of leakage protection function only, and changes the name to the general requirements of Residual Current Operated Protector on the basis of controversy in 1986. The general requirements specified in the standard include: characteristics, normal working conditions, structure and performance requirements, verification and marking requirements of characteristics and performance requirements. After the promulgation of the standard, the technical conditions of the manufacturer's products have a basis. Because the standard is a mandatory executive standard, the relevant national departments have scientific certification conditions for the compulsory certification of products. The implementation of this standard has played a guarantee role in improving the product quality of Residual Current Operated Protector in the late 1980s, and has played a positive role in promoting the healthy development of the production industry of Residual Current Operated Protector in China after the service life of parts is reached. With the further demand for safe power consumption in production and life, there are many imperfections in the separate installation of switches with leakage protection in some places, which limits the use of residual current operated protectors. In order to meet the requirements of overcurrent protection in some places