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Contamination measurement
- Oct 17, 2018 -

The umbrella skirt was brushed with 100 ml of deionized water and the conductivity of the water after brushing was measured to calculate the salt density (ESDD). After measuring the conductivity, the brushed water is filtered, dried, and weighed to calculate the gray density of the shed. In order to reduce the workload and investigate the water-repellent and salt-tight and gray-tight distribution of the whole insulator shed, the insulator to be tested is generally divided into three areas (low-pressure end, middle part, high-pressure end) in the measurement. Choose a number of sheds to measure their salt density. Considering the universality of measurement, the first umbrella at the high pressure end and the low pressure end is generally not selected; generally one umbrella is measured each time during measurement, considering that the performance of the adjacent shed is close to and reduces the workload, the test can only be detected at most once. Two umbrellas. Separately measure the salt density and contamination of the upper and lower umbrella surfaces of the insulator. During the measurement of conductivity, the solution should be fully stirred. After the conductivity is stable, read it again.