Oil dielectric strength test is an important part of insulating oil testing.Insulating oil in electrical power apparatus serves two primary roles, as an insulator and a coolant. As an insulating liquid, oil’s most important property is a high dielectric strength test result and as a cooling liquid, a low viscosity is paramount. Weshine® invent the VS-9501 series is a fully automatic transformer oil BDV test kit designed with advanced technologies to run dielectric strength test (electrical breakdown strength test) of insulating oil, which has a quick sensing ability to measure accurate breakdown voltage.