Shackle Insulator china Causes of Pollution Flashover
2023-01-30
Ice and snow coverage of Shackle Insulator China have different effects on the pollution flashover voltage.
Shackle Insulator china The impact of ice and snow
Ice and snow coverage of Shackle Insulator China have different effects on the pollution flashover voltage. According to the experimental research of relevant scientific research departments, when Shackle Insulator China is polluted first and then freezes, under the same salt density, no matter in the frozen state or in the melted state Its pollution flashover voltage can be increased, and its withstand voltage will not change when the ice is fully melted. Under normal circumstances, because ice and snow are often polluted in the air and then freeze on the Shackle Insulator China, the withstand voltage value is the lowest at this time, and flashover accidents are extremely prone to occur. At present, countries all over the world are very concerned about the influence of high altitude and heavy ice areas on the electric strength of Shackle Insulator china, and are actively carrying out research work.
The effect of altitude
Due to the low atmospheric pressure in high-altitude environments, discharges are prone to occur, and the arc is relatively thick. After the AC zero crosses, the circuit is prone to discharge, and the arc is prone to re-ignition, which is difficult to extinguish. Therefore, the insulation of power transmission and transformation equipment operating at high altitude and low air pressure should be strengthened. In the calculation of insulation coordination, its influence must be fully considered, and the pollution flashover voltage should be appropriately increased. Generally, when the altitude is above 3000 m, the pollution voltage value should be increased by about 25%.
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