News
News

14

2022

-

07

On the relationship between dielectric constant, insulating properties and breakdown voltage

As a manufacturer of special cables, customers often ask whether the dielectric constant, insulation performance, and breakdown voltage are related in the end? The larger the dielectric constant, the stronger the polarization of the reflected medium, shouldn't it be easier to be broken down? The inspection of these three technical parameters is particularly important for manufacturers of high temperature and high voltage cables.


Views:

As a manufacturer of special cables, customers often ask whether the dielectric constant, insulation performance, and breakdown voltage are related in the end? The larger the dielectric constant, the stronger the polarization of the reflected medium, shouldn't it be easier to be broken down? The inspection of these three technical parameters is particularly important for manufacturers of high temperature and high voltage cables.
First, we need to understand the dielectric constant, also known as dielectric constant, permittivity or permittivity. When an electric field is applied to a medium, an induced charge will be generated and the electric field will be weakened. The ratio of the original applied electric field (in vacuum) to the electric field in the final medium is the permittivity (permittivity), also known as the inductive rate. It is a coefficient that expresses the characteristics of insulating ability .Everything is a dielectric (solid, liquid and gas, as long as it is put into an electric field), but there are differences in insulation and conductivity, poor insulation, and will not be used as a common capacitor intermediate barrier. Dielectric. The relative permittivity reflects the polarization strength of the material and has no strong relationship with the insulation. The insulation depends on the conductivity. Conductance is the free movement of charges over long distances from binding, and there is no matter in the vacuum, so there is no charge movement, that is, conductance. The vacuum meets the requirements of small polarization and high insulation at the same time. The relative permittivity is the ratio of the material permittivity to the vacuum permittivity.
It can be seen from the definition that the larger the dielectric constant, the stronger the ability to bind charges, the better the insulation performance of the material, and the higher the withstand voltage performance.

 

Key words:

Related news

undefined

undefined

Product Search


图片名称

      Wechat

Service Hotline:+86-18916582990

Mail::sales@sh-dingzun.com

Address: No. 136, Changxiang Road, Nanxiang Town, Jiading District, Shanghai

二维码

Business Consulting

二维码

Business Consulting

Copyright © 2022 Shanghai Dingzun Special Wire and Cable Co., Ltd.