Publish Time: 2022-07-19 Origin: Site
In the specific application process of Nylon Cable Glands' online insulation state detection technology, it can comprehensively detect the insulation state of power equipment based on maintaining the power supply. When the specific detection operation is carried out, the various data obtained by the detection can be updated in real-time, and at the same time, the acquired data can be accurately and quickly transmitted to the computer, and the corresponding measurement operation can be completed intelligently. Through the application of the online detection technology, on the one hand, the power outage problem caused by the offline detection can be avoided, and on the other hand, the accident caused by the damage of the Cable Glands can be avoided, thereby further improving the power supply and distribution efficiency. In addition, the whole testing process is flexible and simple, which can greatly reduce the investment in material resources, human resources, financial resources, and other aspects. So what is the specific application of Nylon Cable Glands online detection technology? Let's take a look.
This is the content:
DC superposition method
DC component method
The specific application principle of this method is to add a DC voltage of about 50V to the center point of the voltage transformer and then superimpose the low-voltage DC voltage on the AC high-voltage to complete the measurement of the insulation resistance of Nylon Cable Glands to judge the aging of Cable Glands. If the insulation resistance value exceeds 1000MΩ, it indicates that the cable insulation is in good condition and can be applied; when the insulation resistance is between 100~1000MΩ, the surface cable insulation resistance can still be applied; when the cable insulation resistance is between 10~100MΩ, the cable insulation resistance can still be applied, but when applying it, pay more attention; when the cable insulation resistance value is less than 10MΩ, do not continue to use it, and replace the Cable Glands in time. During the specific detection period, the DC superposition method is used to measure the insulation resistance at the cable joint. The data obtained are very similar to the insulation resistance value obtained by adding DC high voltage after the power outage, and the data is accurate. It can be seen that the insulation resistance of Cable Glands can be quickly detected online.
Relevant research results show that the dendritic insulation defect of the cable will form a rectification effect, which means that when the AC voltage repeatedly flows, the water tree will inject a small amount of positive charge in the positive half-cycle phase, and will inject a small amount of positive charge into it in the AC negative half-cycle phase. A large amount of negative charge is injected, which causes asymmetry in the discharge process. It will also cause the positive charge to be completely neutralized, resulting in a large amount of negative charge, which will accumulate in a large amount in the insulating layer of nylon Cable Glands, which will adversely affect its application. From the practical point of view, after a certain period, the negative charge will move towards the end of the branch, and then a weak DC leakage problem will occur. In the detection, the DC component method is used, which is to conduct a comprehensive detection of the leaked DC. The entire Cable Glands detection operation is completed online, and the detection results are accurate and efficient.
The above is about the specific application of Nylon Cable Glands online detection technology. If you are interested in nylon Cable Glands, you can contact us. Our website is https://www.chsplastics.com/.
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