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How to test composite pin insulator?

Composite pin insulator is installed in the transmission line, which is in operation due to the long withstand mechanical and electrical load, sun and rain, cold and heat changes and other effects, reduced insulation resistance may occur, such as failure to crack even the breakdown of power supply reliability Xing bring potential threat, therefore, composite pin insulator line detection is significant.

composite pin insulator test

In the high-voltage transmission lines, composite pin insulator aging directly affects the safe operation of the power system. Aging zero value insulator insulator especially prone to overheating is not only expands, resulting in dry cracked head pin insulator, causing breakage accident, and its flashover voltage low, reducing the insulation level of high voltage lines. A value of zero means that the insulator runs in the potential distribution of the insulator across the insulator is close to zero or equal to zero. A value of zero or low impact insulators (low and insulators> zero value insulator insulation resistance is generally 0 MΩ ~ 300MΩ): insulated circuit conductors depends on the insulator string, due to manufacturing defects or external effects, insulation insulator will continuously deteriorates, or when the insulation resistance is reduced to zero or a low value when called insulators> zero value insulators. They run a greater impact on the line, according to incomplete statistics, the proportion of zero or low values ​​of about 0.3 percent insulator line running about suspension porcelain insulator.

D and production of composite pin insulator tester fully meet DL / T 626-2005 verification procedures, enabling measurement of insulation resistance. The equipment is mainly used for 35 ~ 500KV power line (tandem), insulation resistance distribution (the power outage detection insulation resistance). In order to determine the degree of insulation composite insulator.

In the June 2005 release of DL / T 626-2005 "deterioration of the disc-shaped pin insulator testing procedures" provides insulator five detection methods: First, measure the voltage distribution; Second, measure the insulation resistance. Third, the power frequency voltage withstand test; fourth, mechanical strength test; fifth patrol. Which especially "Measuring voltage distribution" and "Measuring the insulation resistance" two detection methods is most important. The company developed and produced HTJC-C Insulator distribution voltage meter to fully meet the DL / T 626-2005 verification procedures, enabling measurement of voltage distribution. The equipment is mainly used to measure AC line insulator strings 35KV ~ 500KV tower over the line, by measuring the voltage distributions to the detection of the deterioration of the insulator, can reduce power system accidents, improve safety and security of supply lines.

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