SU951514A1 - Controlled discharger - Google Patents

Description

(5) CONTROLLED DISTRIBUTOR

one

The invention relates to electrical engineering and can be used for switching in high voltage installations when receiving voltage and current pulses, as well as in devices for protection against overvoltages.

The main requirements for the spark dischargers are: a short response time with simultaneous high stability of this time and a long service life of the components of the electrode and, above all, of the electrode system. One way to increase the reliability of the electrode system is to use the rotation of an electric discharge arc by a magnetic field.

A spark discharge is known, consisting of two main electrodes, in one of which an igniting trigatron unit is made and an electromagnet coil is placed. When an electromagnet field interacts with a switched current field, an arc of an electric discharge rotates. As a result of this rotation and the use of special-shaped electrodes, the erosion of the electrodes is reduced, which determines their service life 1J.

However, this glitch is characterized by a relatively long Q time lag and a low response stability.

The closest to the technical essence of the invention is a controlled discharge containing two opposite main electrodes, one of which contains a control cylindrical electrode separated from the main electrode by an insulating sleeve

Claims (2)

20 between the main electrodes and the coil of the electromagnet mounted coaxially with the control electrode 2. The disadvantages of this arrester are a small service life of the bushing that is destroyed by the thermal and mechanical effects of the electric discharge arc of the main switched current, especially when filling the discharge chamber with high-pressure gas or a liquid dielectric. The aim of the invention is to increase the service life of the insulating sleeve. This goal is achieved by the fact that a controlled arrester containing two opposing main electrodes, one of which houses a control cylindrical electrode separated from the main electrode by an insulating sleeve protruding into the gap between the main electrodes, and the electromagnet mounted coaxially with a control electrode, said insulating sleeve is made in cross section with different wall thickness. With such a design of the discharge hub, a control spark arises when the insulating sleeve is blocked in the place of its smallest thickness. Then the arc of the main discharge together with the control spark magnetic field moves along the sleeve to the region where the thickness of the insulating sleeve is maximum. Upon further movement, the arc completely detaches from the sleeve. As a result, the thermal and mechanical effect on the sleeve of the main discharge arc decreases, which, given the greater thickness of the sleeve, in the place where it is affected by the arc, leads to an increase in the service life of the sleeve and the entire discharge. . FIG. 1 shows the proposed matrix, general view; in fig. 2, bit AA is shown in FIG. 1. The discharge (Fig. 1) contains a high voltage electrode 1 and a grounded 2 in which the electromagnet 3 coil is placed and the control cylindrical electrode i is separated from the grounded electrode by an insulating sleeve 5. The sleeve is made with different wall thickness around the perimeter, for example the inner hole is round and the outer surface has the shape of an ellipse (Fig. 2). The wall thickness of the hub between points A and B is several KO times less than the wall thickness between points C and D. The discharge heater operates as follows. Before starting the discharge, a high voltage is applied to the electrodes 1 and 2, and the power is turned on to the coil of the electromagnet. When an igniting pulse is applied to the control electrode, the insulating sleeve 5 overlaps between points A and B, where the distance between the electrodes 2 and 4 and the wall thickness of the sleeve is the smallest. The control spark initiates the main discharge between electrodes 1 and 2. The main discharge arc, together with the control spark, under the action of a magnetic field moves along the sleeve to point C, where the thickness of the sleeve is maximum. Upon further movement, the arc completely detaches from the sleeve and no longer touches it. Thus, the time of thermal and mechanical action of the arc on the sleeve is reduced. Moreover, the arc moves along the surface of the sleeve, where its thickness and, consequently, mechanical strength is higher than in the place of the overlap of the sleeve by the control spark. At the same time, the trigger time of the glitter and the stability of its start-up remain at the same level as compared with the known gage, but the service life will increase by 2-3 times. Claims of the Invention A controlled discharge containing two opposing main electrodes, one of which houses a control cylindrical electrode separated from the main electrode by an insulating sleeve protruding into the gap between the main electrodes and an electromagnet coil installed coaxially with the control electrode, characterized in that, in order to even increase the service life, said insulating sleeve is made in cross section with different wall thickness. Sources of information taken into account in the examination 1.Patent of England No. 822000, cl. 39 (1), 1959. 2. USSR Author's Certificate No. / UtyS, cl. H 01 T 3/00, 1978. X ± mm TO