RU2190276C2 - High-voltage isolating transformer - Google Patents

Abstract

FIELD: electrical engineering; transformer manufacture. SUBSTANCE: transformer has magnetic core, primary and secondary windings, taps and leads of primary and secondary windings, winding-to-winding insulation, winding-to-core insulation, plate-shaped high-voltage bushing, casing with base; leads of one of windings are disposed in terminal strip mounted on casing at its base; novelty is that leads of other winding are proposed to be disposed on front vertical surface of high-voltage bushing top section in recess made in plate second from top and used as terminal strip of secondary winding and also provided with detachable lid. All transformer leads are shielded from environmental effects. EFFECT: enhanced operating reliability of transformer. 1 dwg

Description

 The invention relates to electrical engineering, in particular to transformer building, and may find application in the design and manufacture of isolation transformers.

 Known single-phase transformer ZNOM-35-65, containing a magnetic circuit, primary and secondary windings, taps and leads of the primary and secondary windings, insulation between the windings, as well as between the windings and the magnetic circuit, a high-voltage porcelain plate-shaped input and a housing with a base, the conclusions of one of the windings which is openly placed on the upper part of the high-voltage input, and the terminals of other windings are in the terminal block (terminal box) located on the housing at its base [1].

 The open arrangement of the terminals of one of the windings on the upper part of the high-voltage input exposes them to atmospheric influences, which leads to their pollution and moisture, and this, in turn, negatively affects the electrical strength of these elements, and, therefore, reduces the operational reliability of the entire transformer as a whole .

 The invention solves the problem of creating a high-voltage isolation transformer, characterized by high operational reliability, due to the weather protection of the terminals of all transformer windings.

 To solve the problem in a high-voltage isolation transformer containing a magnetic circuit, primary and secondary windings, taps and leads of the primary and secondary windings, insulation between the windings, as well as between the windings and the magnetic circuit, a high-voltage plate-shaped input, a case with a base, and the conclusions of one of the windings are placed in a terminal block located on the housing at its base, equipped with a cover, it is proposed according to the present invention the findings of another winding at high potential lay down the front vertical surface of the upper part of the high-voltage input in a recess formed in the second top plates and terminal block which is a secondary winding, and also provided with a removable cover.

 The invention is illustrated by the example of the drawings, which show: in Fig.1 - the inventive transformer with a partial section; figure 2 - view BB of figure 1.

 The high-voltage isolation transformer contains a magnetic circuit 1, primary 2 and secondary 3 windings, taps 4 and conclusions 5 of the primary winding 2, taps 6 and conclusions 7 of the secondary winding 3.

 Between the secondary winding 3, which is under high potential, and the primary winding 2, as well as between the windings and the magnetic circuit 1, insulation 8 is located.

 A high-voltage input 9 of a dish-shaped form, i.e. consisting of plates 10, is placed on the housing 11 having a base 12.

 The conclusions 5 of the primary winding 2 are located in the terminal block 13, located on the front surface of the transformer, at its base 12 and closed by a removable cover 14.

 The conclusions 7 of the secondary winding 3, which is under high potential, are located on the front vertical surface of the upper part of the high-voltage input 9 in a recess made in the second plate 10 from above and which is the terminal strip 15 of the secondary winding 3.

 The terminal block 15 of the secondary winding 3 is equipped with a removable cover 16 made of an insulating material, such as fiberglass.

 The implementation of the conclusions of the winding, which is under the potential of the high voltage circuits and isolated from the power supply circuits in the recess located on the front vertical surface of the upper part of the high-voltage input, made in the second input plate from the top and closed by a removable cover, provides the necessary electrical strength of the external insulation of the winding, allows you to protect the conclusions this winding from atmospheric influences due to the overlapping of the recess with the upper plate of the high voltage input and closing the recess with a lid and, Thus, increases the operational reliability of the transformer.

 At JSC Sverdlovsk Plant of Current Transformers, a high-voltage isolation transformer was developed, manufactured and tested, in which the claimed solution was implemented.

 Positive test results confirmed its performance, high operational reliability and widespread practical applications in the future.

Literature
1. A. M. Dymkov, V. M. Kibel, Yu.V. Tishenin "Voltage Transformers", Publishing House "Energy", 1975, p. 67.

Claims (1)

 A high-voltage isolation transformer containing a magnetic circuit, primary and secondary windings, taps and leads of the primary and secondary windings, isolation between the windings, as well as between the windings and the magnetic circuit, a plate-shaped high-voltage input, a housing with a base, while the conclusions of one of the windings are located in the terminal block, located on the housing at its base, equipped with a cover, characterized in that the terminals of the other winding are located on the front vertical surface of the upper part of the high-voltage input in the recess, olnennom second platter on top, which is the terminal block of the winding and provided with a removable cover.

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