SU1381634A1 - Arrangement for preventing whipping of wires of aerial power lines - Google Patents

Abstract

The invention relates to electrical engineering and can be used to protect transmission lines with a voltage of 1000 V against emergency shutdowns caused by interlocking wires. The goal is to increase reliability by protecting the wires from damage and facilitating installation. Some end fittings of the insulator and the smooth elongated element made of dielectric material are connected to the wire with the help of kerchiefs with overlays and pins. Other end fittings of the insulator and a smooth elongated element made of dielectric material are overlapped with each other using a pin. Washers made of tracking material can be installed on the pin connecting the end caps of the insulator and the smooth cylindrical element made of dielectric material. The goal is achieved by connecting the end fittings, using the gussets and their shape. 1 3.p. f-ly, 4 sludge with i (L

Description

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The invention relates to electrical engineering, in particular to the protection of power lines with voltages above 1000 V from emergency shutdowns due to overlapping of wires.

The aim of the invention is to increase reliability by protecting the wires from damage and ease of installation.

Fig, 1 shows the device a general view; in fig. 2 - an attachment unit for an insulator to a wire using a scarf with an overlay; in fig. 3 - unit for joining a smooth elongated element with an insulator using insulated washers; in fig. 4 - transmission line span with the proposed device installed in it.

The device contains an insulator 1 and a smooth elongated element 2 made of a dielectric material, connected to the wire 3 with the help of the fixing device 4 for the wires Insulator 1 and the smooth elongated element 2 have 5 "sockets

The fixture 4 for fastening the wires is a kerchief with an overlay and made with concave semi-cylindrical channels for the wire (Fig. 2),

The wire 3 is connected to one of the window holders 5 of the smooth elongated element 2 and the insulator 1 by means of pins 6, / The other end caps 5 of the smooth elongated element of the dielectric material and the insulator are joined by a sword; with ribs 8.

The joint of a smooth elongated element 2 made of a dielectric material with an insulator 1 using insulating washers 9 located on the pin 6 is shown in FIG. 3. Such a structure is used when the device is operating under a polluted atmosphere.

With a joint assembly, truncated cone-shaped washers reduce leakage currents and the intensity of partial discharges. Partial discharges cause damage to the surface of the insulator in the form of training or erosion. The higher the partial discharge intensity, the faster the training or erosion will be. To avoid damage, you must

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Partial discharge by reducing leakage currents.

In the device at the junction of the insulator with a smooth elongated element washers 9 are of conical shape made of training resistant. material. The number of washers may vary depending on the degree of pollution of the atmosphere. In the presence of leakage currents and partial discharges, the shape of the washers ensures quick drying of the surface of the washers during humidification. With dry washers, the leakage tone becomes so small that partial discharges on the surface of the insulator and the rod cease,

which generally saves the surface and reduces losses.

With the mass use of devices on extended parts of power transmission lines, losses from leakage currents can reach significant values. In the presence of a mount with the use of special washers, there are practically no losses.

When using the device in areas with a strong pollution of the atmosphere, a thin metal gasket 10 is placed between the internal training-resistant insulating washers 9 (FIG. 3),

Such a connection enhances the intensity of partial discharges and provides greater heat generation. At the installation site of the gaskets, heat removal is difficult. Therefore, a dry surface is formed quickly and is maintained for a long time.

UN. E 1 cf)

where and is the nominal voltage between the wires; 1 - the length of the inclined surface

washers;

 dry bitwise sloping gradient.

Installing the device between the lower and middle wires (meaning the vertical arrangement of the wires) is most effective. When the ice is cleared, the lower wire jump is limited by a spacer, and when the medium jumps to the upper wire, the middle wire is held by a spacer fixed on the lower wire

When installing the device in the middle part of the span, an additional rigidly fixed point appears and the wire behaves as if an additional support is installed in it and, therefore, the phase closure is eliminated (Fig. 4). Thus, the span is reduced by 2 times. and the oscillation amplitude of the wire is significantly reduced.

In areas where strong gusting winds are observed, the number of devices in the span can be set to three. The arrangement of the three devices is possible in one section and broken down along the span.

The installation of the device on the lines is carried out in the following order. Initially, areas and spans are determined where wire clashes occur most often and measures are required to prevent it. The number of devices in the span and the distance between them is determined. It is recommended to place the device in different sections of the span by 1/3 and 2/3 of the span in order to combat the main harmonics arising during the flight. The order of installation of individual devices depends on their design. Devices are mounted from the car jack after completing the required safety precautions. The invention

Claims (2)

1. Device to prevent wire from overlapping The Research Institute of Power Transmission with voltage higher than 1000 V, containing a smooth elongated element made of dielectric material with oKOHqeBarenHNffl, an insulator connected to it with end fittings and a device for securing wires, characterized in that, in order to increase reliability by protecting wires from damage and facilitating installation each of the fixtures for fastening the wires is a kerchief with an overlay made with concave semi-cylindrical channels under the wire connected with pins to one of the ends of the The sleeves of a smooth elongated element made of a dielectric material and an insulator, and other tips of a smooth elongated element made of a dielectric material and an insulator are overlapped with an additional pin. 2. A device according to claim 1, characterized in that, in order to control tracking resistance when operating in areas with a polluted atmosphere, it is provided with washers in the form of a truncated cone made of tracking resistant material and located on an additional pin on the inside and outside of the smooth elongated element of dielectric material and insulator. Phg / g.Z.