Relay (English name: relay) is an electrical control device is when the input (excitation) changes to meet the specified requirements, the controlled output in the electrical circuit to produce a predetermined step changes in a kind of electrical appliances. It has the control system (also known as the input circuit) and the controlled system (also known as the output circuit) between the interaction. Often used in automated control circuits, it is actually an "auto-switch" that uses small currents to control high-current operation. Therefore, the circuit plays an automatic adjustment, safety protection, conversion circuit and so on. Relays Industry Overview and Status - Relays, which originated in the late 1960s and began research on the initiative of some scholars in Britain, Australia and the United States. In the mid-1960s, the idea of ​​using a small computer for protection of relays was proposed, but since computers were expensive and unable to meet the technical requirements for high-speed relay protection at the same time, no practical application was made in terms of protection, but this started A great deal of research on the theoretical calculation method and program structure of computer relay protection has laid a theoretical foundation for the development of relay protection. Computer technology in the early 1970s and mid-major breakthrough occurred, the rapid development of large-scale integrated circuit technology, making the microprocessor and microcomputer into a practical stage. The drastic drop in prices, reliability, substantial increase in computing speed, prompting the study of computer protection appeared junk. In the late 1970s, a relatively complete prototype of microcomputer protection appeared and was put into trial operation in the power system. In the 1980s, microcomputer protection has matured in terms of hardware structure and software technology and has been popularized and applied in some countries. In the 90's, the power system relay protection technology developed to the era of microcomputer protection, which is the fourth generation in the history of the development of relay protection technology. The study on microcomputer protection in our country began in the late 1970s and early 1980s. Although it started late, its progress was very fast due to the efforts of relay protection workers in our country. After 10 years of struggle, by the end of 1980s, computer relay protection, especially the transmission line microcomputer protection has reached a large number of practical level. China's research on computer relay protection, universities and research institutes play a leading role. Relays from the field of application of our point of view, communications and industrial control, home appliances and automobiles is still the largest relay market. According to the relay market research report shows that the greatest demand for general-purpose relays, especially high sensitivity, small, ultra-small PCB relays, low-power relays. From the market situation, the relay is a large amount of large-scale services, technical content is not high, meager profits, the market potential of larger competitive industries. Although China's relay industry has experienced decades of development, but the overall level of products and the world advanced level there is a big gap, mainly as follows: 1) The low level of design, the small number of military products, the poor adaptability to the environment and the low level of reliability can not fully meet the requirements of weaponry and high-tech combat. General relays of poor quality consistency, breed replacement slow, low-end high-end market share, can not meet the domestic and international market demand, can not completely replace the import. 2) Low ability of independent development and innovation: The research on common technologies is not extensive, the technical forces are not fully exerted, and the supporting technologies are weak, which is the main reason that affects the speed of new product development. 3) backward production technology, low level of automation, worse ability of process control means seriously affecting the consistency and reliability of product quality, resulting in higher service costs. 4) The management level is low, the overall quality of managers is low, and the management mode is outdated. In particular, the change of management thinking is slow and incompatible with technological development. 5) CAD is still low-level applications, CAM and CAT in the initial stage, product development cycle is long, and the replacement of the machine does not meet the requirements of fast. Materials can not keep up with the development of relay technology requirements. 6) The material failure physics analysis is not wide and deep; domestic materials less varieties, there are no key manufacturers of materials, such as flame retardant fine plastic installation line and pressure-sensitive tape still need to import; adapt to the relay material conversion equipment is lagging behind, incomplete Especially for material rolling. Testing techniques and tools need to be improved and improved. Vegetable chopper, meat chopper, Electric Chopper Jiangmen Taifai Technology Co.,Ltd , https://www.glaremecn.com