Dielectric material is a material that does not conduct electricity. Examples include plastics and other resins, rubber, ceramics, glass, pure water, insulating oil (transformer oil), and fluorine-based inert liquids. To test insulation performance, a high voltage is applied, and the resulting leakage current is measured to calculate the insulation resistance.
Matsusada Precision manufactures and sells high-voltage power supplies that are indispensable for evaluating insulation performance. Care must be taken when handling high voltage.
