Switching device body

FIELD: electricity.

SUBSTANCE: switching device body comprises two sides with screw clamps for external load, with current splitters, a mechanism of free splitting and a contact device. A body has a path of an electric arc with two buses of electric arc displacement. Between end sections of buses there is an arc-quenching chamber from a group of arc-quenching plates, to which a chamber adjoins to blow an arc with a hole for arc blowing. Between an arc-quenching chamber and an arc-blowing chamber there are solid guide ribs, and inside the arc-blowing chamber there are solid walls shaped to body sides. A hole for arc blowing is arranged on the plane formed by a plane arranged at the angle α<90° to the setting plane of the body. Guide ribs shaped to one and the other side of the body are arranged as a whole, at least with some of solid walls shaped to the body side. At least some of the walls shaped to one and the other side of the body have sections, which are arranged in parallel to the setting plane of the body, and sections are arranged perpendicularly to the setting plane of the body.

EFFECT: higher reliability of a switching device due to elimination of arc blowing hole closing with dirt and dust particles, as a result of higher intensity of ionised gases cooling without increased dimensions of a body.

8 dwg

 

The invention relates to the field of electrical engineering, in particular to the switching devices designed to protect electrical circuits with overload and short circuit, current in normal mode and operative inclusions and switching-off of these circuits.

Known most similar in essential characteristics to the claimed technical solution is the case of a switching device according to patent WO 02/075760, NN 9/34, 2002.09.26, consisting of two side walls defined therein two screw terminals for connection of external conductors, thermal and electromagnetic tripping current, the mechanism of a free trip, a contact device consisting of a movable and a stationary contact and having a path of an electric arc, a limited two tires move the electric arc between the end sections which are located arc chamber, consisting of a package of arc-quenching plates, which is adjacent the chamber for blowing the arc with an opening for blowing the arc, in each side of the hull between the arc chamber and the chamber for blowing the arc are reformowanie integral guide ribs inside the chamber for blowing the arc has a solid wall extending up to the mid-plane of the shell, and solid walls, reformowanie to one Boko is ine corps, executed perfectly from solid walls, preferowanych to the other sidewall of the housing, and the plots are displaced with respect to solid walls, preferowanym to one side of the body, and the sites are located on the same line with the walls, priparkovannymi to the other sidewall of the housing.

The disadvantages of this device include the following:

in the known switching device hole for blowing the arc met on the plane located at an angle α=90° to the installation plane, so when the installation switching device hole for blowing the arc is at the top. While leaning on the body of the dust particles and dirt can enter and accumulate inside the compartment for collecting dust, formed by sections of solid walls, preferowanych to each sidewall of the housing in a known manner. Thus particles of dust and dirt in the compartment for collecting dust can block the hole for blowing the arc, which can adversely disabling the switching device short circuit currents. In addition, ionized gases coming out of the holes for blowing out the arc, are electrically conductive and can cause electrical breakdown between adjacent supporting parts under tension;

in the known switching device before entering the chamber for blowing the deposits arc is mixing streams of ionized gases, which can lead to insufficient cooling, and, as a consequence, thermal damage of the objects located near the switching device.

Thus, these disadvantages may disrupt the proper functioning of the switching device.

The problem to which the invention is directed, is to increase the reliability of the switching apparatus through the development of a housing of a switching device with a hole for blowing the arc, located so that it is possible to eliminate its overlapping particles of dirt and dust and the design of the chamber for blowing the arc, allowing cooling ionized gases more intensively without increasing the dimensions of the switching device.

To solve this problem is proposed the building of a switching device comprising two sidewalls defined therein two screw terminals for connection of external conductors, thermal and electromagnetic tripping current, the mechanism of a free trip, contact a device consisting of a movable and a stationary contact and having a path of an electric arc, a limited two tires move the electric arc between the end sections which are located arc chamber, consisting of a package of arc-quenching plates, the which is adjacent the chamber for blowing the arc with an opening for blowing the arc in each of the two sidewalls of the hull between the arc chamber and the chamber for blowing the arc are reformowanie integral guide ribs inside the chamber for blowing the arc has solid walls, reformowanie to each of the two sidewalls, and a solid wall, reformowanie to one side of the body, performed well against a solid wall, preferowanych to the other sidewall of the casing and the wall, reformowanie to one side of the casing, the parts are shifted, and the sites are located on the same line with the walls, priparkovannymi to the other sidewall of the housing.

What's new is that the hole for blowing the arc met on the plane formed by the plane located at an angle α<90° to the mounting plane of the housing, the guide ribs, reformowanie to one and to the other sidewall of the housing, made in one piece, at least some of the solid walls, preferowanych the same side of the housing, at least some of the walls, reformowanie to one and to the other side of the body, have areas that are parallel to the installation plane of the housing, and areas which are perpendicular to the installation plane body.

This design of the housing of the switching device due to the location of the holes for blowing out the arc on the plane formed by the second plane, below α<90° to the installation plane, allows to eliminate the possibility of overlapping particles of dust and dirt holes for release of ionized gases, as well as to eliminate the possibility of electrical breakdown between adjacent supporting parts under tension.

In addition, new technical solution allows to increase the path of ionized gases in the chamber for blowing the arc, without increasing the dimensions of the switching device. This is because reformowanie to one and to the other sidewall of the housing guides the edges made in one piece with some of the solid walls, preferowanych to the sidewall of the housing. At least some of the walls, reformowanie to one and to the other sidewall of the housing, are the sites located in parallel, and the sites located perpendicular to the installation plane of the housing. The flow of ionized gases at the inlet into the chamber for blowing the arc is divided into several separate streams. In the future, each separate stream of ionized gas changes its direction relative to the initial plane and at the same time is the breaking of the flow of ionized gas into separate streams located in different planes with the subsequent change of direction of individual streams, the prot is non in two-dimensional and three-dimensional channels, each separate stream, passing your way, not mixed with others. The integration of separate threads in the chamber for blowing the arc occurs before the hole for blowing out the arc. This allows for the same dimensions of the chamber for blowing the arc to make the path of ionized gases in the chamber for blowing the arc length. When the flow along such a three-dimensional channel turbulence separate branched flows of ionized gas is better than when the flow along a two-dimensional channels, with each stream of ionized gas comes in contact with a larger surface, which increases the cooling efficiency of ionized gases.

Figure 1 shows the case of a switching device is removed from the left sidewall;

figure 2 shows the right side of the housing of the switching device;

figure 3 shows the left Cabinet side switching device;

figure 4 shows a fragment of a casing of a switching device;

figure 5 shows a section a-a 6;

figure 6 shows cross-section B-B 6;

figure 7 shows the right side of the housing of the switching device, in axonometric projection;

on Fig pictured left Cabinet side switching device, in axonometric projection;

The switching device includes a housing comprising the second of the two sides - right 1 and left 2 (see figure 1). The body is equipped with two screw clamps 3 and 3' for connection of external conductors, heat 4 and 5 electromagnetic releasers current freewheel release 6, the contact device containing mobile 7 and 8 fixed contacts. The case of a switching device has a path of an electric arc 9, limited two tires 10 and 11 move the electric arc. Between the end sections of the tire 10 and 11 move the electric arc is arc chamber 12. Arc chamber 12 consists of a pack of arc-quenching plates 13, which is adjacent the chamber for blowing the arc 14 having a hole for blowing the arc 15. Between the arc chamber 12 and the chamber for blowing the arc 14 are reformowanie to the right 1 and left side walls 2 of the casing integral guide ribs 16 and 16', respectively (see figure 1, 2, 3). Solid walls 17 and 17', reformowanie to right 1 left 2 Cabinet side, are perpendicular to the longitudinal lateral walls of the right 1 and left 2 Cabinet side, however when viewed in horizontal projection, solid walls 17, reformowanie to the right side wall 1 of the casing is made perfectly solid walls 17', preferowanych to the left side wall 2 of the housing (see figure 4, 5, 6). Wall 17, reformowanie to the right side wall 1 of the casing, the parts shifted attributed the Yu to the walls 17', preferowanym to the left side wall 2 of the housing and the sites are located on the same line with the walls 17', priparkovannymi to the left side wall 2 of the housing (see figure 4, 5, 6).

Plane 18, which has a hole for blowing the arc 15 is formed by a plane located at an angle α<90°, for example 35°, to the installation plane 19 of the casing of a switching device (see figure 1, 2, 3).

The guide ribs 16 and 16', reformowanie to the right 1 and left 2 Cabinet side, respectively, made in one piece, at least some of the solid walls 17 and 17', preferowanych to the same side (see Fig.7, 8).

At least some of the walls 17 (17'), reformowanie to right 1 left 2 Cabinet side, respectively, are sections 20 (20')which are parallel to the installation plane 19 of the housing, and sections 21 (21'), which are perpendicular to the installation plane 19 of the chassis (see figure 2, 3).

The switch operates as follows. In the normal state (enabled switching device) controlled by the current passing from the first screw terminals 3 via the heat release power 4 and the flexible connection 22, gets to the movable contact 7. After that, through the fixed contact 8 to the electromagnetic trip unit current 5, and then the second screw clamp 3'.

The mechanism of a free RA is Ceplene 6 is driven from heat 4, and from electromagnetic 5 tripping current.

The heat release power 4 consists of a bimetallic plate which is heated by a controlled current. One end of the bimetallic plate fixed in the housing of the switching machine, the second remains freely movable state. When the occurrence of current overload, the bimetallic plate is heated and its free end comes into contact with the thrust of 23 acting on the mechanism of a free trip 6, the mechanism of a free trip 6 trip and mobile 7 and 8 fixed contacts open.

Electromagnetic release current 5 contains the coil 24 with stop ferromagnetic, the magnetic core, a movable armature and a spring-loaded plunger 25. With the emergence of high short circuit currents rapid change of the magnetic flux in the coil 24 contributes to the fact that ferromagnetic stop moving in the direction of the freewheel release 6, the pusher 25 is hitting the tripping rod 26, which in turn strikes a movable contact 7. Mechanism of a free trip 6 and movable 7 and 8 fixed contacts open.

The movable contact 7 is pre-tensioned by a spring 27 in the direction of the open position of the movable contact 7. In the case of disengagement, that is, PR is overload or short circuit are amplified minor deviations of the movable contact 7, caused by the plunger 25 of the electromagnetic trip unit current 5 or bimetallic plate thermal release of the current 4, through the rod 23 by means of spring 27 to a complete reversal of the movable contact 7 in the open position.

To enable switching of the machine is provided which is driven manually, the handle 28.

Electric arc that occurs due to disconnection between the fixed 8 and a movable contact 7, passes through the path of the electric arc 9 with a conical extension. This path of the electric arc 9 contains two bus 10 and 11 move the electric arc, of which the first 10 are formed by extension of the fixed contact 8, and the second 11 - through its arcuate curved contact tires.

Between the end sections of the tire 10 and 11 move the electric arc is arc chamber 12, which consists of arc-quenching plates 13.

Occurs when opening contacts 7 and 8, the electric arc is moved along each of the tires 10 and 11 move the electric arc in the arc chamber 12, where it is divided arc-quenching plates 13 on a large number of series-connected partial electric arcs. The voltage required to maintain such a consistent inclusion partial electric arcs above the voltage that Tr is required to maintain a separate electric arc, having the same overall length. A breakdown of the individual electric arc, which occurs in the arc chamber 12, may lead to the extinction of the electric arc.

From electric arcs are formed ionized gases that can go out through the hole for blowing the arc 15, performed on the plane 18 formed by a plane located at an angle α<90° to the installation plane 19. Ionized gases have high temperature and before exiting the body must be cooled deinitialise. This happens with the camera for blowing the arc 14, which is located between the arc chamber 12 and opening for blowing out the arc 15.

For the orderly transfer of ionized gases from the arc chamber 12 into the chamber for blowing the arc 14 is provided by the guide ribs 16 and 16', which are located between the arc chamber 12 and the chamber for blowing the arc 14. In the chamber for blowing the arc 14 are reformowanie to each Cabinet side solid walls 17 and 17'which extend channels driven flow of ionized gas between the arc chamber 12 and opening for blowing out the arc 15. The guide ribs 16 and 16' as well as the walls 17 and 17', the whole preferovany to each sidewall of the housing. The guide ribs 16 and 16', reformowanie to the right 1 and left 2 Borovinskaya respectively, made in one piece, at least some of the solid wall, preferowanych to the same side.

These elongated channels, and also the fact that separate streams of ionized gas in the process of movement through the chamber for blowing the arc 14 are not mixed with each other, and flowing the cool surface preferowanych to the parts of the body solid walls 17 and 17', are cooled more intensively.

The case of a switching device consisting of two side walls, defined therein two screw terminals for connection of external loads, thermal and electromagnetic tripping current, the mechanism of a free trip, contact device with movable and stationary contacts, and having a path of an electric arc with two tires move the electric arc between the end sections which are located arc chamber, consisting of a group of arc-quenching plates, which is adjacent the chamber for blowing the arc is equipped with a hole for blowing the arc between the arc chamber and the chamber for blowing the arc are reformowanie to each Cabinet side integral guide ribs inside the chamber for blowing arc to each Cabinet side preferovany solid walls, the walls, reformowanie to one side of the body, performed perfectly from the walls, privo kavannah to the other sidewall of the housing, solid wall, reformowanie to one side of the casing, the parts are shifted, and the sites are located on the same line with solid walls, priparkovannymi to the other sidewall of the housing, characterized in that the hole for blowing the arc met on the plane formed by the plane located at an angle α<90° to the mounting plane of the housing, the guide ribs, reformowanie to one and to the other side of the hull, made in one piece, at least some of the solid walls, preferowanych the same side of the body, in addition, at least some of walls, reformowanie to one and to the other side of the body, have areas that are parallel to the installation plane of the housing, and areas that are perpendicular to the installation plane of the housing.



 

Same patents:

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EFFECT: provision of commutation switch with effective means to remove cooling gases.

15 cl, 10 dwg

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