SU1229833A1 - Induction device - Google Patents

Abstract

The invention relates to single-phase transformers or reactors with high-voltage taps, high current leads and high-voltage windings in a strong electric field. The purpose of the invention is to increase reliability by increasing the dielectric strength and decreasing the heating of the connecting wires. The induction device contains a casing with a coolant, a magnetic circuit with a center, a high-voltage winding 4 made of two sections mounted on adjacent rods of the magnetic circuit, a high-voltage tap consisting of connecting wires (SP) 6 and an electrostatic shield (EE) 8 covering the joint venture 6. Dielectric rings (DC) 9 are installed inside EE 8 in its middle part, and its ends are flattened in the axial direction and lie on the end surface of the high-voltage winding. Since the screen, which created a large radius of rounding, was extended beyond the outer diameter of the winding sections and its max-ends. Closely to the place where the connecting wires exit the winding, the electric strength increases at the point where the tap leaves the winding. 2 or;

Description

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The invention relates to electrical engineering, to single-phase transformers or reactors with high-voltage taps, conductive high current and high-voltage windings in a strong electric field.

The aim of the invention is to improve the reliability of the device in the work by increasing the electrical strength and reducing the heating of the connecting wires.

Figure 1 shows the induction apparatus, top view, section; figure 2 - section aa on. figure 1.

An induction device, such as a transformer or reactor, contains a casing 1 with a dielectric fluid, in which the magnetowire 2 is located, with low-voltage 3 mounted on its rods and a high-voltage 4 windings; the latter is made of two sections mounted on adjacent rods of the magniou wire, T1 high-voltage tap 5, consisting of connecting wires 6, arranged around the circumference of the winding 4 to the outlet through the longitudinal plane of the transformer to their connection 7, electrostatic shield 8, closing cables .

The electrostatic shield 8 is a dielectric tube, such as bakelite, flattened at the ends along the axial line and cut into two pieces along the longitudinal axis.

The tube halves are mounted on two rigid dielectric support rings 9, which serves as a screen frame and inside which wires 6 run freely to connect them.

A layer of metal coating 10 is applied to the outer surface of the tube 8 by any known method, for example, by applying a foil to it.

After assembly, a solid insulation 11, for example, made of cable paper, is applied over the tube. The screen length exceeds the distance between the sections and, therefore, the CBotttot screen with flattened ends is free via the extreme coils T2 of the high-voltage volt- age windings of 4 adjacent rods inside the radial size of the windings.

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Such a screen design provides a significant increase in electrical strength at the point where the tap leaves the winding, since the screen,

5, which creates a large radius of rounding, extended beyond the outer diameter of the winding sections, and its ends are very close to the point where the connecting wires exit from the winding.

10 Due to the fact that the screen is extended to the axles of the winding sections for their outer diameter, and the rigid supporting dielectric rings allow the connecting wires to move freely inside the screen, with the resulting differences in the height of the windings during pressing, the retraction can take any inclined position, while damage occurs

20 isolates the drive at the ends of the screen and improves heat removal from the junction, as well as cooling, the liquid can circulate freely inside the screen.

25 The present invention allows to increase the reliability of the device operation, reduce the size of the core by bringing the parts of the windings closer to each other, reducing the consumption of electrical steel by 1-2%. transformer oil by 3-5%, reduce energy losses and reduce labor costs.

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Claims (1)

Invention Formula An induction device containing a housing with cooling liquid, internal magnetic conductor with rods inside it and high-voltage winding from two sections installed on adjacent magnetic conductor rods, connecting wires connecting sections between them, placed inside the conductive screen, This is due to the fact that, in order to increase its reliability in operation by increasing electrical strength and reducing heating of the connecting wires, it is equipped with dielectric rings, inside which are located The lead wires, the dielectric rings being installed inside the conducting screen in its middle part, and its ends flattened axially and lie on the end surfaces of the high-voltage winding. Editor L. Gratilllo Compiled by A. Panibratets Tehred I.Popovich Proofreader M. S Amborska Order 2455/52 Circulation 643 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Design, 4.