Article | REF: D2325 V2

Glass for electrical insulation

Author: Jean-Marie GEORGE

Publication date: February 10, 2016

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


Overview

Français

ABSTRACT

Among the materials having electrical insulating properties glass is an ideal candidate. The mechanical constraints of the applications dictate however how it should be used. Glass applications in electrical insulation are therefore concentrated in toughened glass insulators or glass fibers for reinforcement of polymers. Each of these technologies will be approached in this article from a material and chemical aspects as well as their manufacturing particularities. Electrical mechanical and chemical applied stresses will be described and the particularities of their respective domains of application discussed.

Read this article from a comprehensive knowledge base, updated and supplemented with articles reviewed by scientific committees.

Read the article

AUTHOR

 INTRODUCTION

This article deals with glasses used in the electrotechnical field, whose main applications are in electrical insulation techniques for conductors or live elements in power transmission and distribution networks. The focus is on molded glass and glass fibers used for mechanical reinforcement of resin parts in direct contact with conductor elements, for example in composite insulators for power lines or substations, tubular structures used in substation insulators, or surge arresters for distribution or extra-high-voltage lines.

Glass tempering, the fundamental aspects of which will be explained here, has made it possible to take into account the ever-increasing tensile mechanical loads imposed on overhead power lines, making annealed glass insulation a thing of the past. In addition, insulating materials made from glass-fibre-reinforced polymeric materials enable insulation applications in which the mechanical stresses are not only tensile, but also bending or compression, or their combination.

The chemistry of glass used in electrical insulation is mainly determined by the nature of the currents applied (alternating or direct) to the molded insulators, while the chemical or electrochemical corrosion of glass fibers guides the choice of materials used for polymer reinforcement.

We will omit certain theoretical aspects for which reference documents can be consulted, and where the reader will find details of the fundamental equations and physical principles relating to the material glass in general and its properties.

You do not have access to this resource.

Exclusive to subscribers. 97% yet to be discovered!

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


The Ultimate Scientific and Technical Reference

A Comprehensive Knowledge Base, with over 1,200 authors and 100 scientific advisors
+ More than 10,000 articles and 1,000 how-to sheets, over 800 new or updated articles every year
From design to prototyping, right through to industrialization, the reference for securing the development of your industrial projects

KEYWORDS

Toughening   |   mechanical reinforcement of polymer insulators   |   Toughened glass   |   glass fibers


This article is included in

Glasses and ceramics

This offer includes:

Knowledge Base

Updated and enriched with articles validated by our scientific committees

Services

A set of exclusive tools to complement the resources

Practical Path

Operational and didactic, to guarantee the acquisition of transversal skills

Doc & Quiz

Interactive articles with quizzes, for constructive reading

Subscribe now!

Ongoing reading
Glasses for electrical insulation