Abstract

Proposed is a discharging screen intended for equalizing electric field intensity in the vicinity of a component of an electrical system or transmission line and enabling the discharge of an overvoltage in the event of a lightning strike. The discharging screen is designed for mechanical attachment to a component of an electrical system or transmission line and comprises an elongate conductor designed to permit electrical contact with said component of an electrical system or transmission line. The shape of the elongate conductor enables the conductor to bend at least partially around the component of an electrical system or transmission line. The characterizing feature of the discharging screen is the presence of an insulating layer which at least partially covers the elongate conductor, and the presence of an at least first main electrode mounted on top of the insulating layer and/or at least partially in the insulating layer.

IPC Classes  ?

• H01T 4/02 - Overvoltage arresters using spark gaps Details
• H02G 13/00 - Installations of lightning conductorsFastening thereof to supporting structure

Abstract

Proposed is a discharging screen for the lightning protection of components of an electrical system or transmission line and the equalization of an electric field. The discharging screen comprises an insulating body designed for mechanical attachment to a component of an electrical system or transmission line. The insulating body has a shape which enables it to bend at least partially around the aforesaid component of an electrical system or transmission line with the formation of an air gap between the insulating body and the component of an electrical system or transmission line. Mechanically connected to the insulating body are two main electrodes and two or more intermediate electrodes, which are situated between the main electrodes such that a discharge can be generated between the main electrodes and the intermediate electrodes adjacent thereto and between adjacent intermediate electrodes.

IPC Classes  ?

• H01T 4/02 - Overvoltage arresters using spark gaps Details
• H02G 13/00 - Installations of lightning conductorsFastening thereof to supporting structure

Abstract

A lightning arrester for protecting elements of electrical facilities or a power transmission line comprises an insulating body which is made of a solid dielectric, preferably in the form of a bar, a strip or a cylinder, two main electrodes that are mechanically coupled to the insulating body and two or more intermediate electrodes. The intermediate electrodes, preferably made in the form of bars or cylinders, are arranged between the main electrodes so that said intermediate electrodes are mutually shifted along the longitudinal axis of the insulating body or along a spiral line. Such design makes it possible to form a discharge channel between the adjacent electrodes. Furthermore, said electrodes are located inside the insulating body and are separated from the surface of the body by an insulation layer. Discharge chambers formed as cavities or through bores opened to the surface of the insulating body are arranged between the pairs of the adjacent electrodes. Dimensions of the chambers are selected such that a discharge is easily blown out from the chambers to the surface of the insulating body, thereby increasing the efficiency of the discharge current quenching. In the preferred embodiments, the arrester is provided with an additional electrode for reducing a flashover voltage. Various embodiments of a power transmission line using the arrester of the invention are also disclosed.

IPC Classes  ?

• H01T 4/18 - Arrangements for reducing height of stacked spark gaps

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.

IPC Classes  ?

• H02H 9/06 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters

Abstract

The lighting arrester for protecting elements of electrical facilities or a power transmission line comprises an insulation body which is made of a solid dielectric, preferably in the form of a bar, a strip or a cylinder, two main electrodes that are mechanically coupled to the insulation body and two or more intermediate electrodes. The intermediate electrodes, made in the form of bars or cylinders, are arranged between the main electrodes so that said intermediate electrodes are reciprocally shifted along the longitudinal axis of the insulation body or along a spiral line and make it possible to form a discharge channel between the adjacent electrodes. Furthermore, said electrodes are situated inside the insulation body and are separated from the surface of the body by an insulation layer. Dead or through discharge chambers coming out to the surface of the insulation body are made between the pairs of the adjacent electrodes. The dimensions of the chambers are selected so that a discharge is easily pushed out from the chambers to the surface of the insulation body, thereby increasing the efficiency of the discharge current quenching. In the preferred variants, the arrester is provided with an additional electrode for reducing a discharge voltage. The different variants of the structure of power transmission lines using said arrester are also disclosed.

IPC Classes  ?

• H01T 4/16 - Overvoltage arresters using spark gaps having a plurality of gaps arranged in series
• H02H 9/06 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
• H02G 13/00 - Installations of lightning conductorsFastening thereof to supporting structure

Abstract

A lightning arrester for protecting electrical facilities or power lines comprising an insulating body made of a solid dielectric, two main electrodes coupled to the insulating body and two intermediate electrodes. The intermediate electrodes are arranged between the main electrodes so that the intermediate electrodes are mutually shifted along the longitudinal axis of the insulating body or along a spiral line. This makes it possible to form a discharge channel between adjacent electrodes. Furthermore, the electrodes are located inside the insulating body and are separated from the surface of the body by an insulation layer. Discharge chambers (i.e., cavities or bores) opened to the surface of the insulating body are arranged between the pairs of adjacent electrodes. Dimensions of the chambers are selected such that a discharge is blown out from the chambers to the surface of the insulating body to increase efficiency of the discharge current quenching.

IPC Classes  ?

• H01T 4/16 - Overvoltage arresters using spark gaps having a plurality of gaps arranged in series
• H02G 13/00 - Installations of lightning conductorsFastening thereof to supporting structure
• H02H 9/06 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters

Abstract

The high-voltage insulator for securing a high-voltage wire in an electrical plant or in an electric power line comprises an insulating body, the first end of which is used for mechanically connecting to a high voltage wire and/or to a fixing device, the second end being provided with a metal fixture which is fastened thereto and is used for attaching the insulator to a tower. In order to impart lighting protection properties to the insulator, it is also provided with a multi-electrode system consisting of m electrodes, which are mechanically coupled to the insulation body and are arranged between the ends thereof. The electrodes are disposed in such a way as to form an electric discharge between the adjacent electrodes, between the electrode adjacent to the first end of the insulation body and the high voltage wire or the fixture thereof and between the electrode adjacent to the second end of the insulation body and the metal fixture connected to the tower. The insulator is provided with means for compensating the reduction of the insulator creepage path caused by the multi-electrode system. The electric power line using the insulators of this type do not require lighting dischargers.

IPC Classes  ?

• H01B 17/14 - Supporting insulators
• H02H 9/06 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters