SU10500A1 - Coupling for high voltage cables - Google Patents

Description

In couplings for high-voltage cables, with a control core placed in the center of the main wire, screwed hedgehogs are usually used to connect the wires of the cables and avoid the use of adhesions because of the possibility of damage to the insulation of the control core in the usual soldering method. Oraco, with large cross-sections of copper cable cores, the required dimensions of screw-on clamps are so large that they protrude beyond the main insulation of the cable. As a result, a tangential component of the electric field is created in the coupling, which leads to

the fact that couplings with screwing LHI.

We are not reliable enough to operate.

In FIG. 1 depicts an axial section of the proposed coupling; FIG. 2 is a cross-section of it.

The proposed connection for high-voltage cables with the central control core is intended to enable the splicing of the wires of the main cores of the spliced cables to be carried out with the complete elimination of the possibility of damage, insulation of the control core and obtaining the dimensions of the spa.

Not exceeding the size of the diameter of the cable and the cable.

When used to insulate the test core of heat-resistant insulating material tubes, it is possible, according to the inventor, to safely heat the wires when soldering to a temperature of about 200 ° C, whereas, for commonly used insulation materials (impregnated cable paper or the like) such heating inevitably leads to lower penetration. strength; in addition, the use of tubes mechanizes installation. The use of a non-brass sleeve placed between soldered wires and the insulation core of the test core eliminates the possibility of molten solder getting onto the insulation of the control core during soldering, which provides a very small ohmic resistance of the transition contact. The use of a cut in half liner, instead of the usual not cut cable in the cable business, makes it possible to place this sleeve after the end of the insulation of the test core, whereas, otherwise, it would have to be worn beforehand, which would require an increase stripping length of spliced cable ends

aa liner length, which is very undesirable. The device proposed connecting iufta following. Directly to the insulation of the test core 1, under the place of the future spa of the wires of the main cores, tubes 2, 2 and 2 of special heat-resistant insulating material are put on. On top of these insulating tubes, a small brass sleeve 3 is laid, cut in half in parallel to the axis and provided with grooves 3 and 3 at the ends. on a brass sleeve 3 or in a single row, Kaic is shown in the attached drawing, or in several rows, and tied at the junction points. On top of the wires 4, which are located and fastened on the brass sleeve 8, a holder 5 of thin copper sheet is superimposed, with the size of the holder being taken in such a way that its ends do not converge closely, but form a gap of width; In a few millimeters. AT

This gap is filled in by soldering with molten solder.

The subject of the patent.

1. Coupling for high-voltage cables with a central control core, characterized using insulating, made of heat-resistant material tubes 2, 2 and 2, put on the control lead core 1, above the measure of the connection of the adjacent ends of this core 1, on which tubes 2, 2 and 2 is put on a metal comb, cut into a nylon line parallel to the axis of the sleeve 3, on top of which are located,

in one or several rows, the wires 4 of the connected ends of the main conductor are coated on the outside with a thin, cut along a generatrix, a metal ferrule 5, which serves to hold and guide the solder during brazing.

2. In the case of the clutch described in paragraph 1, application of 8 sleeves 8 and 3 in the sleeve, designated for laying wires connecting the two halves of the sleeve together.