First, the difference between vacuum disconnector and load switch and vacuum circuit breaker.
The difference between disconnector and load switch and vacuum circuit breaker;
1. High-voltage disconnector is one of the most widely used high-voltage switchgear. Its working principle and structure are relatively simple, but because of its large usage and high reliability requirements, it has great influence on the design, establishment and safe operation of substations and power plants.
The main feature of disconnector is that it has no arc extinguishing ability and can only open and close the circuit without load current. Disconnector switches are used at all voltage levels to change the circuit connection or isolate the line or equipment from the power supply. It has no interruption ability and can only be operated after the line is disconnected by other equipment. Generally, there are interlocking devices to prevent the switch from misoperation when it is loaded, and sometimes a bolt is needed to prevent the switch from being disconnected under the magnetic force of big fault.
2. The load switch is a kind of switching appliance between the circuit breaker and the disconnector. It has a simple arc extinguishing device, which can cut off rated load current and certain overload current, but it can't cut off short-circuit current.
3. The vacuum circuit breaker is named because its arc extinguishing medium and the insulating medium in the contact gap after arc extinguishing are high vacuum; It has the advantages of small size, light weight, suitable for frequent operation, and can extinguish fire without maintenance, and is widely used in distribution networks. ? Vacuum circuit breaker is an indoor distribution device in 3 ~ 10 kV and 50Hz three-phase AC system, which can be used for protection and control of electrical equipment in industrial and mining enterprises, power plants and substations.
Second, the manufacturer recommended
1. Henan Chen Hao Electric Co., Ltd. is located in Xinxiang City, an important city north of the Yellow River, the hinterland of Taihang and the core area of Central Plains urban agglomeration; Just across the river from Zhengzhou, the provincial capital, and Kaifeng, the ancient capital, it is the economic, cultural and transportation center of northern Henan, a national transportation hub city, and only 50 minutes' drive from Xinzheng International Airport, with very convenient transportation.
Since its establishment, the company has been based on respect for science, love for career and strict attitude towards work; Combining scientific theory with practice, through unremitting efforts, we have developed a series of high-precision electrical products such as high and low-voltage reactive power compensation controllers, smart capacitors and compound switches. Our products include remote power distribution monitoring and monitoring automation terminals.
2. Yueqing Xifan Electric Co., Ltd. is a professional manufacturer of various high and low voltage reactors, series reactors, filter reactors, single/three-phase incoming reactors, three-phase output reactors, DC filter reactors, current limiting reactors, starting reactors, core-adjusting reactors, transformers, reactive power compensation controllers, contactors, intelligent compound switches and similar products. Xifan electric appliance takes honest service as its purpose.
3. Zhejiang Liu Jing Rectifier Co., Ltd. is an enterprise specializing in the production and research of power semiconductor devices and anti-reflection diodes. It is a professional manufacturer of photovoltaic anti-reflective diodes in China. Since its establishment, the enterprise has always adhered to the concept of honest management and sustainable management, and has always focused on rectifier, photovoltaic anti-reflective diode and power semiconductor industries. After years of development, the enterprise has now developed into a comprehensive enterprise integrating product research and development, manufacturing, commerce, import and export of goods technology and online sales. ? Enterprises produce in strict accordance with national standards and implement CQC? Has the т12008standard been passed? IQNET？ CQC？ ISO900 1:2008？ CE？ SGS？ ROHS？ TUV certification, master the core technology of photovoltaic anti-reflective diode, and have national patents. The enterprise mainly produces a full range of anti-reflection diode products, such as photovoltaic anti-reflection diode, anti-reflection diode for junction box, anti-reflection diode for DC cabinet, anti-reflection diode for inverter, anti-reflection diode for solar energy, single-channel photovoltaic anti-reflection diode module, dual-channel negative photovoltaic anti-reflection diode module and dual-channel positive anti-reflection diode module, and provides design services for junction box, DC cabinet and inverter anti-reflection diode for solar energy customers. Ordinary rectifiers, fast rectifiers, ordinary thyristors, bidirectional thyristors, fast thyristors, high-frequency thyristors, bridge rectifiers, power semiconductor modules, Schottky modules, ultra-fast recovery diodes, special modules for welding machines, solid-state relays, solid-state voltage regulators, profile radiators and so on.
Through the comparison of the above examples, we can know that there are many switches in the market, which are often confused by us because of the differences in naming or use. For example, it can be a vacuum isolating switch, a load switch and a vacuum circuit breaker. From the above differences, we can know that they not only have different working principles and structural designs, but also have completely different application fields. Considering that people may choose blindly in the process of purchasing vacuum disconnectors, we have also made a detailed analysis from the perspective of the mature technology scale of manufacturers, which may be useful to everyone.
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