Safe transportation and storage of high voltage insulators, composite insulators

At one end of the pylons are mounted a number of disc-shaped insulators, usually made of glass or ceramic and called insulators, for increased creepage distance.In order to prevent dust and other pollutants from adhering to the surface of the high voltage insulator, the path is formed by high pressure.At one end of the pylons are mounted a number of disc-shaped insulators, usually made of glass or ceramic and called insulators, for increased creepage distance.In order to prevent dust and other pollutants from adhering to the surface of the high-voltage insulator, the path is divided by the voltage at both ends of the high-voltage insulator, namely leakage.Therefore, increasing the surface distance, namely the creep distance, and discharging distance along the insulation surface, namely the leakage distance, is called the creep distance.Climb.Distance = surface distance/system * high voltage.According to the degree of pollution, the creepage distance of 31 mm/kV is usually used in heavy scale areas.

Rod suspension composite insulator

A zero-value insulator is an insulator whose potential distribution on the insulator is close to or equal to zero during operation.

Effect of zero or low value insulator: the insulation of a line conductor depends on the insulator string.Insulation performance of high voltage insulators will continue to deteriorate due to manufacturing defects or external influences.When insulation resistance decreases or becomes zero, it is called a low or zero value.Insulator.We tested this line.The proportion of zero or low value insulators is up to 9%.It can reduce the capacitive reactance between wires to reduce the current loss.

What are the test items of high voltage insulator?

(1) measuring voltage distribution.Generally, it is carried out once every one to three years. Under normal and defective circumstances, the voltage distribution of high-voltage insulator string is different. The defective high-voltage insulator is smaller than the normal voltage, and its voltage is transferred to the element with normal insulation.(2) insulation resistance test.The resistance value of the suspension insulator should not be less than 300M every 1 ~ 3 years with 5000V Megabyte meter.(3) high-frequency withstand voltage test every 1 ~ 3 years.

Safe transportation and storage of high voltage insulators

High voltage insulators often have certain faults and accidents in use, so it is necessary to fully analyze and understand them, solve problems in time, and ensure that high voltage insulators play an important role and value in use.When the high voltage insulator has a certain fault, it should be solved and maintained according to certain rules and methods to give full play to its important role and value.The following is a brief introduction to the solutions and prevention methods of high-voltage insulators in case of failure, so as to protect the good value and efficiency of high-voltage insulators in use: although the problems occurred in construction, transportation and storage did not affect the safe operation of the power grid, its potential impact should not be underestimated.It cannot be ruled out that there may be a number of high-voltage insulators that have been damaged due to improper construction and transportation and have been put into operation online, nor can it be ruled out that some of the high-voltage insulators that have been brittle and broken are caused by construction damage.Therefore, its countermeasures are prevention and replacement, the first to further standardize.

The transportation, storage and construction measures of composite insulators shall be strictly controlled by the quality inspection before they are connected to the Internet, and the damaged high-voltage insulators shall never be connected to the Internet.Secondly, it is necessary to conduct regular inspection and detection of high-voltage insulators running on the Internet, and timely replacement of insulators damaged by mandrel.

Bird pecking and mandle-rod damage will affect the good value and function of high-voltage insulators in use. Therefore, high-voltage insulators should be checked frequently in use to prevent important faults of high-voltage insulators caused by different reasons.In case of such failure, it should be solved in a certain way and method to ensure good usability and value of insulators.Since 2005, bird pecking has been found many times in the inspection and operation of the transmission lines of the inter-regional power grid.Bird droppings flashover accounted for the second place of flashover accidents, accounting for about 29%, which requires special attention due to many reasons.It happens in all the five major power grids, mostly in the inland west and the eastern coast.Generally it can be judged from the surface of the umbrella skirt and whether there are traces of bird droppings left under the pole tower.The main danger of bird droppings flascretion comes from the moment of bird excretion. The installation of bird spines on the crossrail on the top of the tower and installation of a large umbrella plate porcelain insulator on the top of the composite insulator all have good effects.

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