Dielectric strength is an important property of insulating material. It can be defined as a property of an insulating material to withstand the certain value of voltage without any breakdown to the material.
Its unit is in (KV or MV )/(mm or cm or m)
Higher dielectric strength of materials corresponds to better insulation properties of the material.
Dielectric strength of material depends on the thickness of insulating material as well as the operating condition of equipment(moisture and temperature).
It important property from the viewpoint of design of electrical equipment as insulating materials are used in many electrical equipment.
For example. 1. Insulating oil, paper insulation used in the transformer. 2. Insulation provided over the conductors used for domestic purpose. 3. Insulating media used in Circuit breakers.
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