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Pollution degree
- Jun 14, 2018 -

The insulator pollution degree is based on the nature and severity of the contamination of the substation. In the design of substations, the site should be kept away from various sources of pollution, especially chemical plants, fertilizer plants, and metallurgical plants. The site should be on the upwind side of a variety of sources of prevailing wind direction. The selection of the creepage distance between the insulator and the external insulation of the electrical equipment shall be determined according to the pollution level delineated by the nature and severity of the pollution of the substation.

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