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The electrical breakdown of an insulator due to excessive voltage can occur in one of two ways: A puncture arc is a breakdown and conduction of the material of the insulator, causing an electric arc through the interior of the insulator. The heat resulting from the arc usually damages the insulator irreparably.
Insulator may refer to: Insulator (electricity), a substance that resists electricity Pin insulator, a device that isolates a wire from a physical support such as a pin on a utility pole; Strain insulator, a device that is designed to work in mechanical tension to withstand the pull of a suspended electrical wire or cable
Charge-transfer insulators are a class of materials predicted to be conductors following conventional band theory, but which are in fact insulators due to a charge-transfer process. Unlike in Mott insulators , where the insulating properties arise from electrons hopping between unit cells, the electrons in charge-transfer insulators move ...
In electromagnetism, a dielectric (or dielectric medium) is an electrical insulator that can be polarised by an applied electric field.When a dielectric material is placed in an electric field, electric charges do not flow through the material as they do in an electrical conductor, because they have no loosely bound, or free, electrons that may drift through the material, but instead they ...
A topological insulator is an insulator for the same reason a "trivial" (ordinary) insulator is: there exists an energy gap between the valence and conduction bands of the material. But in a topological insulator, these bands are, in an informal sense, "twisted", relative to a trivial insulator. [4]
The electrical insulation system for wires used in generators, electric motors, transformers, and other wire-wound electrical components is divided into different classes by temperature and temperature rise. The electrical insulation system is sometimes referred to as insulation class or thermal classification.
Thermal insulators are materials that inhibit the migration of heat. For electrical insulators , materials that inhibit the migration of electric current , see Category:Dielectrics . Subcategories
This page was last edited on 3 December 2011, at 07:40 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.