High-voltage insulators are of key importance for the operational safety and operating efficiency of transmission systems of electrical power, and it is therefore of no surprise that these components must meet particularly high demands in terms of reliability. In recent years composite insulators have gained great importance in recent years in the field of insulation technology for medium and high-voltage overhead transmission lines and substations.
Composite insulators have been in service in electric power networks successfully for more than 40 years, and now up to the highest operating voltages. The present book extensively covers such insulators with a special focus on today’s prevalent material, which is silicone rubber. It includes a detailed description of the electrical and mechanical characteristics of composite insulators, their material properties, their design as well as typical applications and service experience. Particular attention is given to the mechanical behavior of long rod and post insulators, insulated cross-arms, interphase spacers and hollow core apparatus insulators. The state of the art on manufacturing procedures and the selection and dimensioning of the necessary power arc and corona fittings is presented as well as evaluation tests of “old” insulators, i.e. insulators after many years in service. The closing chapter deals with an up to date overview of test procedures and IEC standards.
The selection and the contents of the various subjects covered in this book are based on the authors’ more than thirty years of experience with a renowned European manufacturer of composite insulators and string hardware. Their long and active participation in the relevant CIGRE and IEC working bodies adding to this experience. This book is therefore addressed to practicing engineers from electric utilities and the industry, as well as to academic professionals.
1). Zero accident for Europe utilities like Greece, Spain for more than 500,000pcs.
2). Each composite polymer insulators is tested before shipment.
3). Silicon Rubber for sheds/housing
4). Glass-fiber reinforced epoxy resin rod for core
5). Hot dip galvanized cast steel for metal fittings
IEC 61109, ANSI C29.1, CSA C411.5, etc. We can design products in accordance with Client’s Requirements.
Socket: Cast iron or cast steel, hot dip galvanized.
Ball: Cast iron or cast steel, hot dip galvanized.
1.2 Minimum thickness of the galvanization: 86μm.
2.1 Material: Epoxy & Glass Fiber, Acid-Resistant Type.
2.2 Diameter: Φ16mm
3.1 Material:HTV Silicone.
Technical data of silicone rubber high voltage insulators
|Rated mechanical tension load|
|Min nominal creepage distance|
|1min power frequency wet withstand voltage (kV)||Full wave lightning impulse withstand voltage peak value (kV)|