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IEC 62961:2018 ed1.0

Действует
Insulating liquids – Test methods for the determination of interfacial tension of insulating liquids - Determination with the ring method — 41 стр.
IEC 62961:2018 establishes the measurement of the interfacial tension between insulating liquid and water by means of the Du Noüy ring method close to equilibrium conditions. In order to obtain a value that provides a realistic expression of the real interfacial tension, a measurement after a surface age of approximately 180 s is recorded.
ICS
29.040.10 Insulating oils / Изоляционные масла