| 摘要 |
AN ELECTRICALLY INSULATING CROSS-ARM FOR A TOWER FOR HIGH-VOLTAGE POWER NETWORKS. THE CROSS-ARM INCLUDES AN INSULATING STRUCTURAL MEMBER (2, 3) FOR ATTACHMENT TO THE LOWER BODY AND TO SUPPORT A CONDUCTOR CABLE. THE INSULATING STRUCTURAL MEMBER COMPRISES A SOLID RIGID SPINE (18) EXTENDING ALONG A LONG AXIS HAVING CROSS SECTIONAL PROFILE, NORMAL TO THE LONG AXIS, HAVING A SECOND MOMENT OF AREA OF ITS CROSS SECTIONAL PROFILE ABOUT EVERY AXIS NORMAL TO THE LONG AXIS AND DISSECTING ITS CENTROID HAS A VALUE OF A² /2? OR MORE, WHERE A IS THE AREA OF THE CROSS SECTIONAL PROFILE. THE STRUCTURAL MEMBER (2, 3) PROVIDES RESISTANCE TO BENDING AND COMPRESSIVE BUCKLING AND ALLOWS CONDUCTORS TO BE SAFELY SUPPORTED AT REDUCED TOWER HEIGHT. T AND Y SHAPED CROSS SECTIONS PROVIDE WATER RUN-OFF AND INHIBITION OF ORGANIC GROWTH. THE STRUCTURAL MEMBERS (2, 3) ARE ALSO GENERALLY USEFUL AS INSULATOR MEMBERS IN HIGH VOLTAGE POWER NETWORKS. |
