SU1472964A1 - Switch - Google Patents

Abstract

The invention relates to electrical engineering. The aim of the invention is to reduce the consumption of copper. The device contains a movable contact system 1 with two breaks, a drive 5 of a movable contact system 1, a fixed contact system 7, supply lines (PN) 13, arcing chambers 11, a current winding, a magnetic system 12. The PN 13 is connected to opposite terminals 8 of a fixed contact Systems 7. Sections PN 13, located opposite each other, form a current winding. The current passing through the PN 13 creates magnetic fluxes in the magnetic systems 12 and in the arcing chambers 11, including areas around the contact pads 3 and 10. The direction of the fluxes causes the opening of the electric arcs inside the arcing chambers when the lining 3 and 10 opens. and their cancellation. 3 il.

Description

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The invention relates to electrical engineering, in particular to switching devices of low-voltage electrical apparatus (contactors, starters, switches) with two breaks in the electrical circuit, mainly for rated currents of more than 100 A.

The purpose of the invention is to reduce the consumption of copper.

Fig 1 shows the proposed switching device, a general view; FIG. 2 is a section A-A in FIG. 1; in fig. 3 shows a section BB in FIG. one.

The proposed device contains a movable contact system 1 with arcing horns 2 and contact plates 3, a contact spring 4, a drive 5 of a movable contact system 1, a rod 6 connecting the drive 5 with a movable contact system 1, a fixed contact system 7 with leads 8, arc extinguishing horns 9 and contact plates 10, insulating arc extinguishing chambers 11 with a narrow slit, magnetic systems 12 P shaped, covering the feed tires 13

For simplicity, FIG. 1-3, no additional details are depicted which fix the device assemblies,

Drive 5 can be performed on any principle of operation.

Non-magnetic plates may also be located in the arcing chambers 11 to improve the arcing with

The switching device operates as follows.

In the on position of the device (FIGS. 1-3), the contact pads 3 and 10 are closed under the action of the contact spring 4 acting on the movable contact system 1.

In the particular case of a constant current i passes through the right supply

max 12 “These flows penetrate the extinguishing chambers 11 and the areas around the contact plates 3 and 10,

When a command is sent to the actuator 5 from an external source in the process of operational switching, or when the maximum current protection is activated, not shown in FIG. 1 through 3, the actuator 5 through the rod 6 causes the movable contact system 1 to move upwards and open the contact pads 3 and 30. The arcs between them under the action of magnetic fluxes F are moved inside the arcing chambers P along the horns 2 and 9 where they are completely extinguished „

As shown in Figs. 1-3, the direction of the flows P is exactly what is required for the movement of arcs inside the arcing chambers 11 "

Obviously, with alternating current, the direction of movement of the arcs will also be inside the arc chambers 13.

Thus, in comparison with the known, the proposed device reduces the consumption of copper, since a multi-turn current winding is eliminated, instead of which feed tires are used. At the same time, copper consumption for increasing tire length does not exceed 30% of copper consumption per single-turn winding

The proposed device can also be used in low voltage electrical apparatuses for higher values of nominal currents (more than 1000 A), for example, in BAT type switches, where the use of special current windings is impossible due to the increased cross sections of the supply busbars. At the same time, by increasing the forces acting on the electric arc, such devices have an increased current-limiting ability.

bus 13 connected to the opposite terminal 8 of the fixed contact system 1, through the left contact pads 3 and 10, to the right along the moving contact system 1, through the right terminal 8 of the fixed contact system 7 and then through the left supply bus 13. Current i passing through the tires 13, creates magnetic fluxes in the magnetic systems

Claims (1)

Invention Formula Switching device containing a movable contact system with two breaks, a drive for a movable contact system, a fixed contact system with leads, arc suppressing chambers, supply busbars, current winding, magnetic field3 14729644 a topic characterized by the contact system so that, in order to reduce the consumption of copper, the supply busbars are connected to opposite terminals and their sections opposite each other are immobilized by the current winding. / 3 17 8 2U52SSSSS eryaz contact system so that they form their sections opposite each other, the current winding. Јif f 12 //