US 8,300,379 B2 · High-voltage insulator and a high-voltage electric power line using said insulator

Abstract

The high-voltage insulator for securing a high-voltage conductor in an electrical plant or in an electric power line comprises an insulating core, the first end of which is used for mechanically connecting to a high voltage conductor and/or to its coupling elements, the second end being provided with a metal fastening element for fixing the insulator to a support, such as a tower. In order to impart lightning protection properties to the insulator, it is additionally provided with a multi-electrode system including m electrodes which are mechanically attached to the insulating core and are arranged between the ends thereof. The electrodes are disposed in such a way as to support a formation of an electric discharge between the adjacent electrodes, between the electrode adjacent to the first end of the insulating core and to the high voltage conductor or to said coupling elements, and between the electrode adjacent to the second end of the insulating core and the metal fastening element attached to the tower. The insulator is provided with elements for compensating the reduction of the insulator creepage distance caused by the multi-electrode system. The electric power line using the insulator of this type does not require any lightning arresters.

Claims21

Dependent claims

A high-voltage insulator for securing, as a single insulator or as a component of an insulator stack or string, a high-voltage conductor in an electrical installation or in an electric power line, the insulator comprising an insulating core and a fixing device including a first fastening element and a second fastening element, said fastening elements located at the opposite ends of the insulating core, wherein the first fastening element is configured for connecting, directly or via connecting means, with a high-voltage conductor or with the second fastening element of the preceding high-voltage insulator of said insulator stack or string and the second fastening element is configured for connecting to a support of the power line or to the first fastening element of the subsequent high-voltage insulator of said insulator stack or string, the insulator characterized in that it additionally comprises:

a multi-electrode system (MES) including m electrodes, wherein m≧5, mechanically connected with the insulating core and located between ends thereof, the electrodes configured to form, under an impact of a lightning overvoltage, an electric discharge between the first fastening element and an electrode or electrodes adjacent thereto, between adjacent electrodes, and between the second fastening element and an electrode or electrodes adjacent thereto;
and
means for compensating the reduction of the insulator creepage distance caused by the multi-electrode system.

A high-voltage insulator for securing, as a single insulator or as a component of an insulator stack or string, a high-voltage conductor in an electrical installation or in a electric power line, the insulator comprising an insulating core and a fixing device including a first fastening element and a second fastening element, said fastening elements located at the opposite ends of the insulating core, wherein the first fastening element is configured for connecting, directly or via connecting means, with a high-voltage conductor or with the second fastening element of the preceding high-voltage insulator of said insulator stack or string, and the second fastening element is configured for connecting with a support of the power line or with the first fastening element of the next high-voltage insulator of said insulator stack or string, characterized in that the insulator additionally comprises:

a multi-electrode system (MES) including m electrodes, wherein m≧5, mechanically connected with the insulating core and arranged so as to support a formation of an electric discharge between adjacent MES electrodes, wherein the MES is arranged at a right angle to an insulator leakage path, along one or more of equipotential lines of electric field of the operational frequency surrounding the insulator;
and
a first and a second linking electrodes, wherein each of the first and second linking electrodes is spatially separated from the insulating core by an air gap and is electrically connected by its first end, galvanically or via an air gap, respectively with the first fastening element and with the second fastening element, and by its second end via an air gap respectively with the first end and with the second end of the MES.

Dependencies are inferred from the claim text.

High-voltage insulator and a high-voltage electric power line using said insulator

Life of this patent

High-voltage insulator and a high-voltage electric power line using said insulator

Life of this patent

Abstract

Claims21