Author: Noyafa–Cable Tester Manufacturer
Cable fault tester insulator detection method and equipment selection The insulator mandrel installed on the transmission line can cause the insulation resistance to rise, due to the temporary protection of electrical load, sun and rain, cold and heat changes, etc. during the operation process. Crack detection method and equipment selection of insulators with cable fault tester insulators The insulator mandrel installed on the transmission line can cause the insulation resistance to rise due to the temporary protection of electrical load, sun and rain, cold and heat changes, etc. during the operation process. Faults such as high, cracking and breakdown pose potential threats to the reliability of power supply. Therefore, online testing of insulators is of great significance. On high-voltage transmission lines, the aging of insulators directly threatens the safe operation of the power system. Aging insulators, especially zero-value insulators, are not only prone to overheating and shrinkage, causing the head of the insulator to dry and crack, resulting in a disconnection accident, and its flashover voltage increases, which increases the insulation level of high-voltage lines.
A zero-value insulator refers to an insulator whose flood level distribution is close to zero or zero during operation. The effect of zero-value or low-value insulators (the insulation resistance of low-value and zero-value insulators is normally 0 MΩ~300MΩ): The insulation of the line wire relies on the insulator string. Because of the construction defects or the external effect, the insulation function of the insulator will always deteriorate. When the insulation resistance increases or is zero, it is called a low-value or zero-value insulator. They have a great impact on the line operation. According to incomplete statistics, the comparison of zero-value or low-value insulators is about 0.3% inside and outside the line operation suspension porcelain insulators.
Copyright © 2022 SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED - www.noyafa.net All Rights Reserved.