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Within the active power capacitor compensation cabinet, why are the cable connections not allowed?

Within the active power capacitor compensation cabinet, why are the cable connections not allowed?

  • Categories:Industry News
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  • Time of issue:2021-05-20
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(Summary description)Sintering and explosion of the cable connections, which have been caused by a short circuit In this picture, it is not difficult to see that, for a reactive power capacitor compensation cabinet which

Within the active power capacitor compensation cabinet, why are the cable connections not allowed?

(Summary description)Sintering and explosion of the cable connections, which have been caused by a short circuit
In this picture, it is not difficult to see that, for a reactive power capacitor compensation cabinet which

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-05-20 14:46
  • Views:
Information
Let's take a look at a group of pictures:
Within the active power capacitor compensation cabinet,  why are the cable connections not allowed?
 
Within the active power capacitor compensation cabinet,  why are the cable connections not allowed?
 
A reactive power capacitor compensation cabinet with the cable connections 
 
Within the active power capacitor compensation cabinet,  why are the cable connections not allowed?
 
Within the active power capacitor compensation cabinet,  why are the cable connections not allowed?
                 
 Sintering and explosion of the cable connections, which have been caused by a short circuit 
In this picture, it is not difficult to see that, for a reactive power capacitor compensation cabinet which has been assembled through connecting the components with the cables, there are the following shortcomings: the internal congestion exists, the wires are wound in a disordered way and becomes knotted; the gap between two components is small; the safety distance is not sufficient; in addition, as the electrical equipment is put into operation, continuous switching on and switching off of the capacitors are performed, the cables are operating under the high current conditions for a long time, the voltage interphase short circuit may be resulted in due to heating and aging. Then sintering, and explosion phenomenon may occur, which will pose serious risks for the lives and property safety of the users. 
Many people will wonder why the reactive power capacitor compensation cabinets at present are so easy to have a short circuit, explosion or burning? The writer has made a summery of this situation, the main reasons are as follows after an analysis has been made:
I) The quality problem of the cable itself. Driven by the crazy pursuit of interests, many manufacturers have always been using the inferior materials and turn out the substandard goods. As the result, the quality of the cables does not meet the requirements specified in the national technical standards; the use of lPVC materials which have a low cost instead of the halogen-free flame-retardant TPE insulation materials, has resulted in the cable with an insufficient insulation strength; as to the cable which has been made using inferior copper, its electrical conductivity is not sufficient and it has such problems as heating and burning hot, which have caused wearing and sintering of the insulation layer.
II) The problems with the installation and the wiring. In the process of the production, the cost has been reduced in blind manner, less wiring has been used, the cables are wound and knotted, so the cables for different phases have been wound together. The cables perform the operation in the condition of high current for a long term and they will have heating and aging. The surface of the cable may be damaged, the copper wire may be exposed. These will lead to such phenomenon as an interphase short circuit, explosions, sintering .
III) The temperature in the cabinet is high and the cable is easy to age. The reactive power capacitor compensation cabinet is a semi closed electrical equipment. If the capacitors and the electric reactor have performed the load operation for a long period of time, they are easy to be heated and, in addition, the ventilation is also not convenient. All these have resulted in a high temperature in the cabinet, which accelerates the aging of the insulation layer of the cable. Even those good insulation materials certainly can not  withstand the high temperature and the high current for a long period of time.
Thus It can be concluded that the reactive power capacitor compensation cabinet in which the components are connected by the cables has certain hidden dangers and does not have the conditions to enable it to be used for a long period of time. Therefore, DELITER has carried out the investigations for many years and has repeatedly studied, produced and developed a new type of closed type bus bar reactive power capacitor compensation cabinet, and this problem with cable winding has completely been solved with this type of  reactive power capacitor compensation cabinet.
In the reactive power capacitor compensation cabinet which uses the closed type bus bar structure, the horizontal and vertical bus bar cross connections have been adopted. Therefore the cables have been completely replaced (as shown in the picture below). Inside the reactive power capacitor compensation cabinet, everything is clear and simple.
 
New type closed bus bar reactive power capacitor compensation cabinet
New type closed bus bar reactive power capacitor compensation cabinet
What is a closed bus bar reactive power capacitor compensation cabinet, as shown in the figure:
① The vertical bus bar: The new type rreactive power capacitor compensation cabinet adopts the vertical bus bar which is connected with the knife melting switch. The knife melting switch adopts the closed structure installation so as to realize the closed knife melting installation structure. 
② The horizontal sub bus bar: The intelligent capacitor module is connected with the vertical bus bar through the transverse sub bus bar, and the connection by means of the primary cable has been completely removed. The intelligent capacitor modules are installed on the panels both in the front panel and the back panel in the cabinet so as to realize the closed bus bar structure. The copper bus bars are cross connected so a closed structure is formed. There is no binding of the primary cable and the secondary cable, which is safe and reliable!
③ The intelligent capacitor module: It has replaced the elements which are arranged in ther eactive power capacitor compensation cabinet in the traditional scattered manner. The closed cabinet structure is adopted, so it is possible to perform closed assembly of the capacitors, the electric reactors and the switching switch. They are connected with the transverse sub bus bars, so the assembly is actually carried out with closed components, without using any primary cable. The intelligent capacitor module, which has been developed by the company, adopts the new communication mode of RS485, in which the functions such control, acquisition and transmission are integrated. This has replaced the traditional control mode of the secondary cable connection, and has fundamentally solved the faults with the cable such as winding and short circuit.
DELITER has always been devoting all its effort in this field and solving problems for customers!

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