Taizhou Tongren Electric Co., Ltd. was established in February 2008 as a one-stop service provider for the manufacture of electronic components and electrical accessories. Since its establishment, the company has been focusing on the production and research and development of conductive parts for solid cabinets. Next, Tongren Electric will introduce to you: the function and principle of solid cabinet.
The solid cabinet is called a solid insulated ring main unit, which is a ring main unit that uses solid insulating materials as the main insulating medium. The vacuum interrupter and its conductive connection, isolating switch, grounding switch, main bus, branch bus and other main conductive circuits are single or combined, and then wrapped and packaged with solid insulating medium into one or more with certain functions, which can be combined or expanded again The module with fully insulated and fully sealed performance, the surface of the accessible module is coated with a conductive or semi-conductive shielding layer and can be directly and reliably grounded. Technical characteristics of the second-generation solid cabinet: The main structure of the second-generation solid cabinet is a * faction product, that is, a vacuum circuit breaker or a vacuum load switch + an air-insulated isolation/grounding switch structure. Compared with the * generation solid cabinet, its structure is characterized by using solid insulating materials to cast the three-phase circuit breaker vacuum interrupter in the shell. The three-position switch (isolation, grounding) adopts a coaxial knife gate type rotating structure, and There is an observation window, you can directly observe the isolation fracture, and the electricity is safer and more reliable.
In order to develop the reliability of the power supply system, household information can be used to obtain power from two research directions, and the power supply network is generally connected in a ring. This is the so-called ring main unit power supply. In the 10kv power distribution system of industrial and mining enterprises, residential quarters, ports and high-rise buildings, due to the small load capacity, the high-voltage circuit is usually controlled by load switches or vacuum contactors and maintained by high-voltage fuses.
The development of this system can generally use ring network power supply, and the high-voltage switchgear used in general life is called ring network cabinet. It refers to a ring-shaped distribution network, that is, used to form a closed loop through the distribution of high-voltage control switches through the power supply to the power supply loop, and then all the supply pipelines from the main line can be externally distributed. The advantage of this is that the power of each distributed branch can be taken two to the left with its trunk, and it can be taken from the right of the main power supply.
When the left trunk line has its own problem, it will continue to carry out economic and continuous research from the right trunk line to effectively improve the power supply, and when the right trunk line has some problems, it can get the control system power supply from the left trunk line for continuous working hours. This is not only that, although the total power supply is single-circuit power supply, but from the fact that Chinese enterprises need each power distribution branch, they get a kind of benefit similar to dual-circuit power supply, and then improve the reliability of power supply according to socialism. . The so-called ring network cabinet means that each distribution branch is equipped with a switch cabinet (outgoing switch cabinet), and its busbar is a part of the ring trunk.
In other words, the ring trunk line is composed of the bus bars of each outlet cabinet. The name of each outgoing cabinet is a ring network cabinet. In fact, the company alone can take out one of the ring network cabinets, but the meaning of "ring network" is invisible. The rated current of the ring network cabinet is not large, so the ring network cabinet generally does not use high-voltage switches. The clutter structure of the circuit breaker adopts the schematic structure of high-voltage load switches and high-voltage fuses. That is, the high-voltage control switches in the ring network cabinet are generally loads and switches. Ring network cabinet, used for normal operating current, and operating system load switch to remove short-circuit current fuse, combining the development of circuit breakers between the two options. Of course, this can only be limited to a certain range.