SU1742892A1 - Multicontact magnetically controlled device - Google Patents

Abstract

USAGE: The invention relates to electrical engineering, stationary shaft and bore alarm systems for activating stem mechanisms. The invention: in contrast to the known devices, the proposed device includes a balloon with at least one chamber with lids installed at the ends, fixed contact electrodes fixed in the caps, a movable electrode made in the form of granules of ferromagnetic material coated with an electrically conductive layer, and a source of MDS . The cylinder is made of electrically conductive material and connected to the lead wire, the caps are made of insulating material. One of the sources of MDS is chosen of lower power and placed near the base of the cylinder. The device is intended for use in an upright position. 2 Il. WITH

Description

The invention relates to electrical engineering and can be used in installations for switching electrical circuits.

A known magnetically operated contact device containing a control winding, fixed contact electrodes and a movable electrode in the form of granules of a magnet material with a conductive layer placed in a balloon.

The disadvantage of this device is the low switching efficiency.

It is also known magneto-contactable device, including a cylinder with lids and insulated chambers, stationary contact electrodes and movable electrodes in the form of granules of ferromagnetic material, covered with an electrically conductive layer, the source of MDS, and the cylinder is made of sections. The device is intended for use in an upright position.

A disadvantage of the known device is the low switching efficiency.

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

The goal is achieved by the fact that the device is equipped with additional contact electrodes, the walls of the sealed balloon are made of electrically conductive material, and the covers are made of insulating material, the chambers are insulated from one another, and one of the walls of each chamber is an additional contact electrode, one of the sources The MDS is selected at lower power and is located near the base of the sealed balloon.

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FIG. Figure 1 shows the magnetic control of its multi-contact device, general view, longitudinal section, with the lower contacts turned on; in fig. 2 - the same, with included upper contacts.

The device comprises a balloon comprising tubes 1, made of an electrically conductive material and connected to the lead wires 2, upper 3 and lower 4 caps, in which the upper 5 and lower b fixed contact electrodes, respectively, are fixed, movable electrodes 7 in the form of granules of ferromagnetic material, covered with an electrically conductive layer, sources 8 and 9 MDS, installed respectively in the upper and lower parts of the device, while the source 9 MDS less power. The cylinder has a chamber 10, in which the granules 7 are located.

The tubes 1 are insulated from one another (for example, there is an air space between them) and are closed at their ends with covers 3 and 4. The covers also act as flanges. The flanges are fastened together with tension rods (not shown). The rods are placed between the tubes 1. As an insulator between the tubes, a non-conductive material can be used.

The tubes 1 and the fixed contact electrodes 5 and 6 are made of copper or other electrically conductive materials, and the covers are made of insulating material (glass, ceramics, etc.),

Control sources can be used as sources of 8 and 9 MDS. The power of the control coil 9 is selected taking into account the arc quenching speed and the mass of the granules 7 and should be approximately 30% less than the power of the source 8 MDS.

The device works as follows.

In the initial state (Fig. 1), the source 9 MDS can be turned on or off. In any case, the lower contacts are in the on state.

When a control voltage is applied to the coil 8 of the control granule 7 under the influence of an electromagnetic field, it is drawn into the upper part of the chambers 10 of the tubes 1,

fill the gaps between the electrodes 5. In this case, the circuit is closed. Simultaneously with the activation of the control coil 8, the control coil 9 is disconnected if it is under voltage.

The control coil 9 is turned on to return the pellets 7 to the initial position, and the control coil 8 is turned off.

Claims (1)

In comparison with the known device in the proposed device, due to the installation of an additional source 9 MDS, the arc extinction rate is higher. By making the cylinder from chambers isolated from one another, limited by conductive shells, a more efficient cooling of the device is achieved. In general, switching efficiency is improved. Claims of the Invention Magnetic controlled multi-contact device comprising a sealed balloon with at least one chamber and lids mounted at the ends of the sealed balloon, fixed contact electrodes located in said lids, movable electrode, made in the form of granules of ferromagnetic material coated with an electrically conductive layer, and sources of MDS, the device being intended to be used in a vertical position, characterized in that, in order to expand the switching capacity, it is equipped with additional contact and electrodes, the walls of the sealed container are made of electrically conductive material, and the covers are made of insulating material, the chambers are insulated from each other, and one of the walls of each chamber is additional The contact electrode, one of the mentioned sources of MDS, was chosen at a lower power and was located near the base of the sealed balloon. J 1 Phie.1