SU1660065A1 - Magnetically-controlled contact device - Google Patents

Description

The invention relates to electrical engineering and can be used as a high-voltage circuit breaker in

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distribution devices, as well as a device for partitioning rail contact networks. The purpose of the invention is the expansion of switching capabilities. Due to the presence of a sleeve with an external cone-shaped surface, effective compression of the contact surfaces is ensured by the forces of the interacting magnetic fields of the MDS source and operating current. In addition, this interaction of individual elements of the device ensures the creation of a contact bridge of granules in the direction of the normals to the current axis and magnetic flux of the control coil. This creates conditions for the occurrence of magnetic blast, which is especially important when switching off short-circuit currents.

The invention relates to electrical engineering and can be used as a power switch in high-voltage switchgear, as well as a device for the sectioning of contact networks of railway transport,

The purpose of the invention is the expansion of switching capabilities.

FIG. 1 shows a magnetic contact device, a longitudinal section, in the initial state; in fig. 2 - the same, in working condition.

The device contains a sealed cylinder, consisting of two sections 1, made in separate housings of electrically conductive material, section 1 is closed with covers 2, each section 1 is equipped with a sleeve 3 made of electrically conductive material with an external cone-shaped surface, each sleeve 3 is placed in the end closed by a cover 2, stationary contact electrodes 4 are located at the ends of sections 1 of a sealed balloon, one of the stationary electrodes 4 is common to two adjacent isolated sections 1. Movable contact Electrode 5 is made in the form of granules of ferromagnetic material, each of which is covered with an electrically conductive layer, and is located in isolated sections 1. Sources 6 MDS are located in the area of working gaps between contact electrodes 4 and 5, source 7 - near the bottom of each section 1. Sources MDS located outside of a sealed container; control windings and permanent magnets can be used as sources of MDS. QuantityIV 2900991

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1660065

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in the cylinder sections may be increased.

To improve arc suppression in sections, transformer oil can be poured. The device can be equipped with a check valve to remove gases formed in sections 1.

The device works as follows.

If there is no manager action

The MDS source of the contact 10 electrode 5 is located at the bottom of section 1. The circuit is open. When a control voltage is applied to the source 6, the electrode 5 under the action of a magnetic field is pulled into the upper part of section 1, an electrical circuit is created: electrodes 4, bushings 3, sections 1, the movable electrode 5.

When removing the control voltage from the source 6, the signal is fed to the source 7, the movable electrode 5 drops off under its own weight and the electromagnetic field generated by the source 7 MDS,

Due to the presence of the sleeve 3, effective compression of the contact surfaces is ensured by the forces of the interacting magnetic fields of the MDS source and the operating current. In addition, this interaction of individual elements of the device provides for the creation of a contact bridge of granules in the direction of the normals to the current axis and magnetic flux of the control coil, while creating conditions for the occurrence of magnetic blast, which is especially important when the short-circuit currents turn off. .

Claims (1)

Claims of magnetically controlled contact device designed to work in a vertical position and containing 5 sealed cylinder consisting of isolated sections, fixed contact electrodes mounted at the ends of the sealed cylinder facing each other, and at least one of the fixed contact electrodes is common to two adjacent isolated sections, a movable contact electrode, made in the form of granules of ferromagnetic material, each of which is covered with elec a conductive layer, with a movable contact electrode located in isolated sections, and sources of control MDS, located outside the sealed balloon 20 in the area of working gaps between the contact electrodes, characterized in that, in order to expand switching capabilities. it is equipped with an additional source of MDS, each section is equipped with a sleeve made of electrically conductive material with an external cone-shaped surface, all sections are made in separate housings completely made of electrically conductive material, the covers of a sealed cylinder are made of insulating material, each conductive sleeve is placed around a fixed electrode in the end closed the lid, each additional source of MDS is located near the other end of the sealed cylinder section. FIG. one 1660065 2