As one of the more economical ways to compensate reactive power, low-voltage compensation capacitors are increasingly chosen by most enterprises. However, the failure rate of capacitors is high due to the high influence of fluctuation of power grid or external factors. Previously, I have explained in detail the causes and countermeasures of failures such as oil leakage and fire of capacitors. In today's article, I will analyze why the capacitor case is deformed? Can they still be used after deformation? Let's see!
The reasons for the deformation of low-voltage compensation capacitor shell The reasons for the deformation of low-voltage compensation capacitor shell are mainly divided into two parts: one is the external reason, due to improper transportation, handling and storage, the China Fan Capacitor capacitor shell is deformed under pressure; the second is the internal reason, a series of reactions occur inside the capacitor during operation, resulting in the deformation of the shell. If the compensation capacitor runs under over-voltage and over-current conditions for a long time, its internal components will be free and produce corona, which in turn leads to the aging of the capacitor's internal insulation and gas, and Z finally leads to excessive pressure and deformation of the shell.
In addition, the high operating temperature of low-voltage compensation capacitors or the high ambient temperature will also lead to a surge of temperature difference between inside and outside, which will in turn lead to the deformation of the shell. Can they still be used? The answer is no! Deformation of the power capacitor case means that it is no longer a minor fault and it is not recommended to continue to put it into service even if its capacity has not decayed. The deformation of the capacitor case is the consequence of a long term internal vicious cycle. If it is not treated in time and continues to be put into use, it is likely to cause more serious consequences, such as the explosion of the capacitor bank.
How to choose low-voltage compensation capacitors? It is recommended that you choose a fully dry type capacitor of oil-free structure with certain explosion-proof device. This kind of dry type capacitor will not leak oil. Even if the capacitor case is deformed due to improper use, more serious fire and explosion will not occur. It is safer and more secure to use.
