Influence of Different Test Methods on Interfacial Tension of Electrical Insulating Oils
The paper compares the detection methods of interfacial tension of transformer oil used in both domestic and for-eign studies.It also investigates the influence of different interface holding times on interfacial tension.The experimental re-sults show that,regardless of whether the oil is fresh or aged,the interfacial tension values decrease with the increase of interface holding time.Moreover,aged oil is more sensitive to the effect of time.To minimize errors caused by different test times and obtain more effective data quickly,it is recommended to use the IEC 62961 method,which is close to the e-quilibrium state,for the detection of interfacial tension of transformer oil in laboratory work.
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