Title :
Polymer concrete outdoor insulation - Experience from laboratory and demonstrator testing
Author :
Schmidt, Lars E. ; Krivda, Andrej ; Ho, Chau Hon ; Portaluppi, Mauricio
Author_Institution :
Corp. Res., ABB Switzerland Ltd., Baden-Daettwil, Switzerland
Abstract :
This study investigates the potential and limits of polymer concrete for outdoor insulation. Polymer concrete with a UV resistant cycloaliphatic epoxy matrix and a filler content of up to 87.5 wt% was formulated. Whereas an increase in filler content reduced strain to failure to about 0.46% (porcelain: 0.1%; 66 wt% filled epoxy: 1.26 %) the Young´s modulus in compression drastically increases up to 38 GPa (compared to about 10 - 15 GPa for a standard silica filled epoxy). Burst tests performed on 72 kV model insulators qualitatively showed a significantly safer burst behavior compared to porcelain. The increasing filler content compared to the epoxy reference (65 wt.-%) had a positive effect on the resistance to tracking and erosion - samples passed 4.5 kV - and the dry-arc resistance. Dielectric breakdown strength, permittivity and loss values deteriorated, but were still in an acceptable range. Overall the material is a viable alternative to porcelain insulation, especially for parts with a moderate electrical and environmental stress.
Keywords :
Young´s modulus; ceramic insulation; compressive strength; concrete; electric breakdown; filled polymers; materials testing; permittivity; porcelain insulators; resins; UV resistant cycloaliphatic epoxy matrix; Youngs modulus; burst testing; compression; dielectric breakdown strength; dry arc resistance; electrical stress; environmental stress; erosion resistance; failure reduction; filler content; outdoor insulation; permittivity; polymer concrete; porcelain; strain reduction; Concrete; Insulators; Polymers; Porcelain; Resistance;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena (CEIDP), 2010 Annual Report Conference on
Conference_Location :
West Lafayette, IN
Print_ISBN :
978-1-4244-9468-2
DOI :
10.1109/CEIDP.2010.5723942