SU48632A1 - High Voltage Suspension Insulator - Google Patents

Description

The best of the existing types of high-voltage insulators are porcelain (for example, Telefunken and Ohio Brass &Co.); they are more convenient and easier to install and use.

But porcelain insulators also have significant drawbacks: unlike plates are in different conditions, one outer, the other inner, which results in the destruction of porcelain; the need for a large number of elements to create the necessary capacitance for a given voltage (36 elements of 1000 cm 35 kV each to obtain a capacity of 1000 cm by 220 kV).

To eliminate the above drawbacks, the authors propose a suspension insulator, which is a capacitor with open plates applied by means of surfacing on a solid dielectric with a large dielectric constant.

According to the materials of the Third All-Union Conference on electrically insulating materials, the addition of rutile (titanium dioxide TiO) to porcelain or to boron-lead glass makes it possible to obtain a dielectric with a dielectric constant of 40 or higher. Focusing on just such material, the authors propose the construction of a suspension insulator-capacitor described below.

The capacitor is a cap 1 of insulating material with admixture of rutile, with a bulge of 2 in the upper part, which serves to attach the fastening device and for contact with the upper plate. The fastening device consists of a metal cap 3, in the center of the upper part of which the rod 4 is riveted for the subsequent installation or adhesion with the next insulator. The metal cap is attached to the condenser as follows. First, a special flange 5 of two semi-semi-shells is fitted on the neck of the condenser convexity, the inner part of which is precisely fitted over the surface of the condenser neck. Then, a metal cap 3 is put on this flange and fixed to the flange n @ of the circumference with screws 6. When the capacitor is suspended, the flange 5, firmly pressed against the hooped surface, holds the capacitor, at the same time creating good contact with the plate surface.

The inside of the capacitor (its bottom plate) is attached for mounting in a similar way. First, a special washer 7 is laid inside the convexity with its mounting and contact rod 8 fixed in the center. This washer has its edges edged. A flange 9 is then inserted, consisting of four parts, also fitting over the surface 2 of the condenser on one side and the conical washer 7 on the other side. Then, the washer 7 is lowered and wedges the flange 9, creating a pofted contact with the bottom plate of the capacitor.

To prevent the conical washer from popping out and the flange parts falling out, the contact rod 8 is fixed to the capacitor with another washer 10 with a spring gasket.

With this mounting design, the insulator works on compressing and suspending a large number of elements into a common arm. In addition, the absence of cement extends the life of the condenser. The difference between the temperature coefficients of the insulator and the metal in this design will not matter.

In order to prevent the insulator from overlapping from plate to plate, only the upper convexity and the spherical part are spooled up to the point where the spherical part becomes flat, i.e., to the places marked with a in the drawing.

Thus, the dielectric protrudes beyond the edges of the applied metal layer and creates a sufficient surface between the opposite plates of the capacitor.

On the lower part, protected from rain and snow, there are fins, like a conventional insulator.

Sighting ends a little further than the transition point of the spherical part into the flat part (mark a in the drawing) so that at the end of the plate and

hence the thickening of the electric field, there was a large thickness of the dielectric and, consequently, greater penetration strength. In addition, the additional capacity in this place can be adjusted to the required capacity.

Due to its design, low weight and size, the proposed capacitor can be hung directly to the transmission line, rather than installed on a special support, like a cable capacitor. The fiber type jib can be switched on after it; Since the second capacitor plate is grounded through the reactance, it has a small voltage and the smelting part of the fuse can be taken of any diameter.

The subject matter of the invention.

Claims (2)

1. A high voltage suspension insulator of the hinge type, in which the dimensions of the external and internal fittings in the part adjacent to the porcelain are increased by applying a conductive layer to the surface of the porcelain, characterized in that, in order to impart to the insulator a large capacity without providing it with an exaggerated hat i.e., very cumbersome while maintaining a significant discharge distance, its head is made in the form of a significant dome-like expansion, in the upper part provided with an additional bulge assigned to the roof wiring the insulator armature on it, and all the way up to the beginning of the ribbed part of the insulator body, is covered with a conductive layer, for example, by doing a looping, in order to use an insulator as a capacitor for high-frequency communication over high-voltage transmission lines. 2. In the isolator according to claim 1, use, as a material for its body, a ceramic composition with an admixture of rutile. the author’s testimony by N. A. Zlatev and V. V. Grzybowski No. 48632 fig fig S