Karl Fischer Titrators, HTMD type Transformer Oil PPM Test Kit, Water Content Measuring unit

CHONGQING, China - Aug. 25, 2021 - PRLog -- The measurement of the breakdown voltage of insulating oils, especially the time of their aging, is an important task to evaluate the degradation of these liquids used for the transformer isolation. According to observe the picture below, we can see that the breakdown voltage reduces with increasing aging time. During the first 20 days of aging, the reduction of breakdown voltage values for the different insulating liquids tested is very low. After 30-70days of aging, the breakdown voltage value for the different types of vegetable oils (OO and SO) and especially the mineral oil, reduces quickly. Conversely, during the same period of aging, there is a small reduction in the breakdown voltage for the oil mixtures O4 and S4 and a more remarkable reduce for the mineral oil MO. We can see that during the first days of aging, the breakdown voltages of the natural esters OO and SO are higher than those observed for their mixtures O4 and S4. These results are the opposite during the last days of aging.

Through the measurements made and presented in this picture, there is a clear correlation between the breakdown voltage and the aging time of the different tested oil. One of the most important reasons for the aging of oil is water content. Removing water content is a very essential progress during the process of Oil Treatment (https://www.assenpe.com/transformer-oil-filtration-system).

The Karl Fischer method allowed us to measure water content in a sample of aged oil. Although the increase in water content is decided by increasing aging time, an aged sample of oil mixture O4 has the lowest water content compared with OO and SO. From both 2 pictures, the output is a close correlation between the breakdown voltage of insulating oil and the amount of water it contains. Thus, it is clear that the growth of the water content with the aging time of the insulating liquid follows a law similar to the growth of the breakdown voltage in terms of aging time. According to the second picture, it is remarkable that the aging time leads to an increase of the water quantity in the insulating liquid and allows the reduction of its breakdown voltage.

Assen HTMD is used to accurately test trace water content in various liquids, solids, and gases. Under the advantages of high testing accuracy, good repeatability, low testing cost, etc. it is widely applied to petroleum, chemical engineering, pharmacy, electricity, scientific research, education department, and so on.

For any inquiry, please don't hesitate to contact Assen