Oil dielectric testers provide measurements of the breakdown voltage of insulating oils used in electrical equipment like transformers, switchgear, capacitors and a variety of other essential electrical and substation components. Oils which possess both a high flashpoint and high dielectric strength (dielectric: transferring electrical energy without conduction) accomplish cooling and serve as essential insulating elements in such components. Testing the breakdown voltage of the insulating oils help assess the condition of the oils, the quality of the refining, the purity of the oil, ageing and dielectric losses. Oil dielectric testers are easy to set up and provide precise, accurate and reproducible results.