Oil has long been recognized as being an efficient coolant with a high flash point and high electric strength when used as an insulating medium in transformers, switchgear and other electrical apparatus. It is critical, however to maintain the oil properly to avoid weakening of the insulation properties.

The electrical properties of the oil can change with degradation due to oxidation, acids, sludge, gas and water absorption. These changes can be identified through a dielectric strength test. Megger Oil Test Sets are designed specifically to determine the dielectric strength of insulation oils. The range of Megger Oil Test Sets offer solutions for all oil testing applications.