There are many types of electrical insulation in use today, with each having unique physical and chemical properties. Most common insulation materials used in electrical cables are made from plastic-polymer-based compounds. Ever wondered why bare conductors used in high voltage transmission systems do not have any insulation? The answer: air is natural insulation between phase-to-phase and phase-to-ground given sufficient distance for the corresponding voltages. There is also insulation in a gaseous state such as the sulfur hexafluoride (SF6). Refer to: Sulfur hexafluoride – Wikipedia. It has a much higher dielectric strength than air and is used in high voltage circuit breakers and switch gears.
Disclaimer: Our product knowledge sharing series is intended for informational and educational purposes only. It shall not be construed as a technical guide or guarantee on our part. If you have any questions concerning our product, please post your questions in the section provided below and we shall contact you as soon as possible.
18,138 total views