ASTM D7150测定低温热应力下绝缘液体放气特性的标准试验方法
日期:2012-02-08 11:09
aratus. Some new oils have produced large amounts of gases, especially hydrogen, without the influence of other electrical apparatus materials or electrical stresses. This renders interpretation of the dissolved gas analysis more complicated.
Heating for 164 h has been found to be a sufficient amount of time to reach a stable and characteristic gassing pattern.
This method uses both dry air and dry nitrogen as the sparging gas. This is to reflect either a electrical apparatus preservation system
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