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Material Selection and Manufacturing Processes for Composite Insulators with Silicone Rubber Housing

  • Chapter
Silicone Composite Insulators

Part of the book series: Power Systems ((POWSYS))

Abstract

This chapter reports on the latest materials and production processes used in the manufacture of composite insulators. It also looks back at the development of rod materials as well as experiences relating to the in-house manufacture of glass-fibre reinforced semi-finished parts. PFISTERER SEFAG AG has more than thirty years of experience in processing low viscosity silicone rubber (namely room temperature vulcanising (RTV) rubber and, more recently, liquid silicone rubber (LSR) as well as high viscosity solid silicone rubber (namely high temperature vulcanising (HTV) rubber). Given this level of experience and silicone rubber’s acknowledged importance as a reliable housing material, this chapter will focus on providing a detailed account of this group of materials. As a result of the close interaction between material formulations, applicable manufacturing processes and operation-relevant properties, the results of key material analyses will also be presented here.

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Abbreviations

AA:

Area, when test solution is applied to surface

AE:

Area, when test solution is extracted from surface

AC:

Alternating current (voltage)

ACIM:

Automated continuous injection moulding

AE:

Acoustic emission

AQL:

Acceptable quality level

ATH:

Aluminium trihydrate, Aluminium hydroxide

C0…C7:

Silicone compound description code

CIGRE:

Conseil International des Grands Reseaux Électriques (International Council for Large Electric Systems)

D:

Start point of an indexed variable

DA:

Diameter, when test solution is applied to surface

DE:

Diameter, when test solution is extracted from surface

DSC:

Differential scanning calorimetry

d:

Rod diameter

dF:

Fibre diameter

E:

Electrical field stress

E-CR or ECR-Glass:

Corrosion-resistant glass fibre for electrotechnical applications

E-:

SCA electron spectroscopy for chemical analysis

FMEA:

Failure mode and effects analysis

FIFO:

First in, first out principle

GFK:

Glass-fibre reinforced plastic

HDK:

Fine-particle silica

HV:

High voltage

HTV:

High temperature vulcanising

IEC:

International Electrotechnical Commission

LMW:

Low molecular weight (chains)

LSR:

Liquid silicone rubber

M1…MX:

Material description code

Mb:

Bending moment

MDA:

Mix and dosing equipment

mL:

Mass loss

N:

Number

RCC:

Company name

SEM:

Scanning electron microscope

RTV:

Room temperature vulcanising

RTV-1:

Room temperature vulcanising 1-component system

RTV-2:

Room temperature vulcanising 2-component system

SR:

Silicone rubber

tex:

Tex number (length mass of a fibre)

TG:

Glass transition temperature

TGA:

Thermo-gravimetric analysis

tF:

Time to failure

tRe:

Rest time

tT:

Test time

tRec:

Recovery time

tTr:

Time of transfer

tL:

Time to loss of a specific property

vP:

Speed of pultrusion

α:

Coefficient of thermal expansion

Δ:

Relative displacement

γ:

Surface tension

θ:

Contact angle

θR:

Receding contact angle

θS:

Static contact angle

θA:

Advancing contact angle

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  1. PFISTERER Holding AG, Hellbühlstraße 37, 6102, Malters, Switzerland

    Konstantin Papailiou

  2. Rüchligrain 5, 6274, Eschenbach, Switzerland

    Frank Schmuck

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  1. Konstantin Papailiou
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Papailiou, K., Schmuck, F. (2013). Material Selection and Manufacturing Processes for Composite Insulators with Silicone Rubber Housing. In: Silicone Composite Insulators. Power Systems. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-15320-4_7

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