Arc-control casing of electric switching apparatus

FIELD: mechanical design of electric switching apparatuses and method for their assembling.

SUBSTANCE: proposed electric switching apparatus has arc-control casing designed to accommodate at least one pole arc-control unit that incorporates two laminated arc-control units disposed either side of movable contact bridge along horizontal axis. Arc-control casing has first member incorporating base formed by first horizontal side of switching apparatus to organize chamber that has space for first laminated arc-control unit and second member connected to first one; second member has base formed by second horizontal side of switching apparatus opposing first one to form chamber that has space for accommodating second laminated arc-control unit.

EFFECT: enhanced mechanical strength and tightness of switching apparatus at superhigh gas pressures, facilitated assembly and reduced time required for this procedure.

15 cl, 7 dwg

 

The present invention relates to electrical apparatus switch low voltage, in particular a device type of contactor, disconnect switch or contactor-switch containing interrupter housing consisting of two parts, with each part forms a chamber surrounding the interrupter plate blocks, to provide better rigidity and better resistance to pressure gases. The present invention concerns also a method of assembling such a device switch.

There are electrical appliances-breakers containing interrupter chamber in which the arc-quenching plates provide cleavage and removal of the electric arc in the shortest possible time at the moment of disconnection of the two contacts. In particular, in a device designed to protect against short circuit currents, the arc-suppressing chamber must withstand powerful electric arc discharges, as well as ultra high pressure gases generated by electric arcs. Interrupter chamber are part of the housing-switch, so its walls must withstand extreme pressure arising at the moment of tripping pin contacts.

Usually device-a circuit breaker includes a housing of insulating material with base in the camera view, the base of which forms the back side of the device-abortion is the determinant. The camera performs an open front so that an integral part of the pole arc nodes (that is, for example, a movable contact bridge, pusher bridge, the contact pressure spring, frame mounting bridge, arc plate blocks, vents etc) you can install the camera on the front.

Usually, to facilitate mounting pole arc nodes fully or partially harvested before they are installed in the camera. Then the chamber is closed by a cover or cap, providing, in particular, the tightness and thus form the interrupter housing, divided into several arc chambers for various power poles device switch. The cover has an additional shutdown system, is arranged to actuate the movable contact of the device. This system off can represent, for example, mechanical locking block, magnetic interrupter unit and/or thermal interrupter block.

The connection between the camera and the cover should be the subject of careful study, as it is subjected to high mechanical stresses associated with high pressure gases, in particular, near the outer end of plate blocks, corresponding to the zone of maximum Yes the ing gases. However, in the conventional configuration, the opening of the interrupter chamber housing and, therefore, the connection zone between the camera and the cover is made almost the entire area of the front side of the camera, otherwise it would be difficult to enter in the interrupter housing the various components of the pole interrupter units, especially after their pre-Assembly. As a result, the area occupied by this connection zone is quite large and is located near the end of the plate packs. This causes considerable stress from the effects of pressure, which reduces the mechanical strength of the interrupter housing, which must be compensated by appropriate fastening devices to maintain integrity between the camera and the lid.

In this regard, it is desirable, especially for devices-switches, large size, through which electric currents of great strength, to develop a simple design interrupter housing, lowering stress ultrahigh pressure inside the arc chambers and allowing however to stay within a simple and rapid Assembly of a pole arc node or pole arc nodes, and system shutdown.

Thus, one of the objectives of the present invention is to provide the value of improved mechanical strength and improved sealing device switch to ultra-high pressure gases at the zone level connection interrupter housing by reducing the square, occupied by the connection zone, and increasing the stiffness of the various components included in the composition of the interrupter housing.

The present invention is the task of creating electrical appliance switch containing interrupter housing is designed for mounting at least one pole arc node is equipped with two arc plate assemblies located on both sides of the movable contact bridge is arranged to actuate along the horizontal axis move. Interrupter housing contains the first element, containing two side walls, a back wall, front wall and the base are formed by a first horizontal side of the device-switch, and thus formed a chamber containing a cavity in which is installed the first arc plate block pole arc node and the second element is made separately from the first element and comprising two side walls, a back wall, front wall and the base are formed of the second horizontal side of the device-switch, opposite the first horizontal direction, and thus is formed a chamber in which is mounted the second arc plate block pole arc node.

The agreement is but the invention of each element of the interrupter housing multi-unit switch further comprises a separator between each adjacent pole, mounted on both the front and rear walls and the basis of the specified element. According to another distinctive sign of each element of the interrupter housing preferably consists of a single molded part.

Thus, the connection zone between the first element and the second element of the interrupter housing is located in a plane virtually parallel to the first and second horizontal sides of the interrupter housing, whereas in the known technical solutions this connection zone is located almost in the vertical plane perpendicular to the axis of the horizontal movement of the contact bridge. Since the height of the arc of the casing of the switch exceeds its depth due to the design of arc nodes, the connection zone occupies a much smaller area, thus providing a better mechanical strength.

Another objective of the present invention is to provide a simple and quick method of assembling electric appliance switch.

This method of Assembly includes the step of introducing pole arc nodes inside the first element of the interrupter housing, the step of attaching the system off to the first element, then the step of mounting the second element of the interrupter housing to the first element so that at the same time for the dig interrupter casing and to provide a jammed system shutdown.

According to the invention, the step of attaching the system off includes a step of attaching a mechanical lock block to the first element, then the step of attaching thermal magnetic unit to mechanical locking block.

Other distinctive features and advantages of the present invention will be more apparent from the following detailed descriptions of preferred options of execution with reference to the accompanying drawings, on which:

Figure 1 represents the device-switch (side view) according to the invention;

Figure 2 - the first element of the interrupter housing-switch (longitudinal section) according to the invention;

Figure 3 - diagram of the system off with a mechanical locking block and thermal magnetic unit according to the invention;

Figure 4 - pole interrupter device unit switch (longitudinal section) according to the invention;

Figure 5 - device-switch (longitudinal section) and the second element interrupter housing-switch according to the invention;

6 - the device-switch (longitudinal section) and block the front side according to the invention;

7 is a General view of the two elements of the interrupter housing tripolar device switch according to the invention.

On the accompanying drawings shows a single-pole or multi-pole electrical device you who luchtel 10 (1) type of disconnector, contactor or contactor-switch, designed for control and/or protection output electrical circuit by switching pole lines 75 input current with pole lines 59 of the output current. Typically, line 75, 59, respectively, of the input current and the output current is connected to the input circuit of the electric power supply and output circuit electric power respectively through the input terminal block (not shown) and an output terminal block (not shown) of the device-switch 10.

Each power pole device switch contains a pole arc node 80 (figure 4)containing a movable conductive bridge 83, which on both sides of the Central horizontal axis X has two movable contact 84, 85. The bridge 83 is made with the possibility of translational motion along the X axis in the front/rear direction so that rasmijoti or close the movable contacts 84, 85 with input and output stationary contacts of the device switch. The device is in the closed or enabled position when the movable contacts are closed with the fixed contacts, connecting lines 75, 59 input current and output current, and in the open or off position when the contacts are open.

In the present embodiment, the pole arc node 80 also includes a pusher 78 Ave is naznaczony for driving the rolling bridge 83 in the direction of the opening, push the contact spring (not shown)driving the movable bridge 83 in the direction of the circuit. It is also possible to provide other devices for moving the rolling bridge 83.

On either side of the X axis of the rolling bridge 83 pole arc node 80 includes the first 81 and second 82 interrupter plate blocks, intended to drain to the outside and to facilitate extinguishing electric arcs formed during the opening of the movable contacts 84 and 85 and the respective fixed contacts 76 and 56. For splitting arcs, you can use other well-known sites, such as the deflector 89. Alarms that occur due to the occurrence of a large current such as short-circuit current results during the breaking of the contacts to ultra-high pressure gas, while gas is directed to the outer ends 81', 82' arc plate blocks 81, 82.

Preferably, each pole arc node 80 is collected previously for easy mounting of the various elements prior to installation in the interrupter housing-switch 10. It is therefore necessary to interrupter housing, first, contained a hole of a sufficient size for convenient introduction of the arc node or arc-nodes 80, and, secondly, provided the strength is in relation to ultrahigh-pressure gas.

In accordance with the present invention, the interrupter housing-switch 10 contains two elements 20, 30 (2 and 7). The first element 20 interrupter housing contains two almost parallel side walls 24, 25, the rear wall 23 and front wall 22 and the base 21 connecting the vertical walls 22, 23, 24, 25. The first element 20 forms thus a first chamber in the form of a parallelepiped, open the side opposite to the base 21. The cavity 29 of the first chamber allows fully or partially set in her first arc plate block 81 pole arc node or pole arc nodes 80. The base 21 of the first element 20 forms a first horizontal side of the casing of the switch 10, for example the upper side.

The second element 30 (figure 5 and 7) interrupter housing contains two parallel walls 34, 35, the rear wall 38 and the front wall 32 and the base 31 connecting the vertical walls 32, 33, 34, 35. The second element 30 forms thus a second chamber in the form of a parallelepiped, open the side opposite to the base 31. The cavity 39 of the second camera allows fully or partially set in its second arc plate block 82 pole arc node or pole arc nodes 80. The base 31 of the second e is ementa 30 forms a second horizontal side of the casing of the switch 10, for example the bottom side opposite the top side 21.

Thus, the two elements 20 and 30 are made in the form of two rigid semi-bodies thus, during Assembly of the device-switch 10 they go to each other by a connection groove, forming a closed interrupter housing and interrupter chamber in the cavities 29, 39. Due to the execution chamber open on one side makes it easy to enter the pole arc node or pole arc nodes 80 in each semi-body interrupter housing. After Assembly of the two elements 20, 30 are connected by means of fastening means, such as means 28, 38 of the latching containing, for example, the elastic element 28 of the element 20, the end of which can snap into place in the hole 38 in the element 30. For connection of the elements 20, 30 can be provided other means of fastening, such as screws.

In the case of multi-pole device-switch (7), each element 20, 30 further comprises a partition 26, 36 between adjacent poles, insulating poles from each other. Each of the partitions 26 and 36 secured to the rear wall 23 and 33 and the front wall 22 and 32, and on the basis of 21 and 31 of the elements 20, 30, respectively. Partitions 26 and 36 parallel to the side walls 24, 25 and 34, 35 and form compartments that define a single cavity 29 and 39, on ratua thus separate interrupter chamber for each pole.

7 shows a three-pole device switch, each element 20, 30 of which contains two dividers 26, 36. In the present embodiment, each partition 36 further comprises an internal groove into which enters a corresponding partition 26. Thus is formed the overlap between the dividing walls 26, 36. The advantage of this technical solution is that it provides the best tightness between the interrupter chambers 29, 39 poles with subject line leakage between the poles and increases the rigidity of the connection zone between the partitions 26 and 36.

The overlap can also be provided for connection between the rear walls 23 and 33 and between the side walls 24 and 34, 25 and 35. As for the front walls 22, 32, they are made so that there was a space sufficient to ensure, in particular, the sliding of the pusher 78 of each pole between the front position and rear position.

Preferably each element 20, 30 interrupter housing is made in a single piece by molding of an insulating plastic, which facilitates manufacture of the device switch and also provides sufficient tightness between the various cavities 29, 39 of each pole and a higher stiffness of the elements 20, 30. Also, the internal dimensions of both elements 20, 30 are provided so that when their attachment to each other they could hold in position set inside of the arc nodes 80 different poles. In addition, the bases 21, 31 both elements 20, 30 can contain multiple through slots 27, 37 for removing gases from the arc chambers 29, 39 and is made in the upper part and the lower part of the device-switch 10.

The connection zone between the elements 20, 30 corresponding to the junction between the two elements assembled, is located approximately in the horizontal plane (figure 1 and 6), almost parallel to the bases 21, 31 interrupter housing. As for the known technical solution, in the connection zone between the camera and the cover is located in front of the interrupter block nearly in the vertical plane orthogonal to the axis of the horizontal displacement X. in Addition, in this device the switch height interrupter housing is less than its depth, given the design and arrangement of the pole arc nodes 80.

Thus, thanks to the present invention, the connection zone occupies a much smaller area than in the known technical solution. As a consequence, for a given value of gas pressure, mechanical stresses action is relevant to the area of connection between the two elements 20, 30, are much smaller, which provides better mechanical strength. This arrangement enables to increase the stiffness of the various parts of the elements 20, 30, particularly at the level of the dividing walls 26, 36. In addition, the connection zone between the two elements 20, 30 can be removed from the outer ends 81', 82' plate blocks 81, 82, in order to reduce the impact of extreme pressure. With this design arc case of two separate elements 20, 30 reach ease the introduction of pre-assembled pole arc nodes and increase the resistance of the arc chambers of the poles ultrahigh pressures of gases.

After Assembly, the side walls 24, 25 and 34, 35 elements 20 and 30 form the sides of the casing of the switch 10. In this case, the interrupter housing forms a base of the device-switch 10, which can be fixed on-off system. In addition, one or the other of the rear walls 23, 33 interrupter housing can accommodate means providing a hanging device switch 10 at any suitable angle, such as a DIN rail. In the described embodiment, these means are hanging on the back wall 23 of the element 20.

The device switch 10 includes a shutdown system consisting of one or more functional is lnyh blocks, designed to provide control and/or protection of the output circuit. In the present embodiment, the on-off system includes Electromechanical thermal magnetic interrupter unit 50 for each pole and mechanical locking unit 40. You can also include other functional blocks, such as magnetic interrupter unit and/or thermal interrupter unit with electronic detection device.

As known from the prior art mechanical locking unit 40 has a locking device 41, acting on each plunger 78 of the pole in the direction of opening, for example, through the crossmember (not shown). It is known that electro-mechanical thermal magnetic interrupter block 50 passes through a load current flowing in the corresponding pole, and may contain serially connected thermal tripping device 51, such as a bimetallic strip, which is driven by the heater, and magnetic tripping device 52, consisting of a magnetic coil and drummer, acting on the movable bridge 83 pole in the direction of opening, for example, through the shock rod (not shown)passing through the plunger 78.

The device switch 10 includes, for each pole fixed input conductor 75, which forms the pole line is the input current, and one end of which is U-shaped with two branches 73 and 74 (figure 2). Branch 74 of the U-shaped conductor includes a fixed input pin 76 that communicates with a movable contact 84. According to the present invention, the input conductor 75 is slid into the device switch 10 through the introduction of the front wall 22 of the first element 20 interrupter housing in the inner space between the two branches 73, 74 U-shaped conductor. The distance between the branches 73, 74 can be selected so that after installation, the input conductor 75 held by jamming branches 73, 74 and the front wall 22.

The device switch 10 also includes, for each pole fixed output conductor 55, one end of which is U-shaped with two branches 53 and 54 (figure 3). Branch 54 of the U-shaped conductor includes a fixed output pin 56, cooperating with a movable contact 85. In the described embodiment, the output conductor 55 are sequentially connected to thermal tripping device 50 of the pole with the magnetic switching device 52, and then with pole line 59 of the output current. Thus the output conductor 55 is fixed on thermal magnetic interrupter unit 50 pole. After Assembly of the block or blocks 50 in the device-switch 10 (5) of the front wall 32 of the second element 30 interrupter housing is injected into the inner space between the two branches 53, 54 each output U-obraz the th conductor 55, providing a retaining and locking system off and simultaneously closing the interrupter housing. The distance between the branches 53, 54 can be selected so that the output conductor held by jamming branches 53, 54 and front wall 32.

The present invention also concerns a simple and quick method of assembling the above-described electric appliance switch. According to the invention the method is as follows.

Enter pre-assembled pole arc node 80 in the arc chute formed in each cavity 29 of the first element 20. The open form of the camera of the first element 20 provides easy insertion through the hole. This step is shown schematically by an arrow And aimed upwards in figure 2. The input pole Explorer or input pin conductors 75 are either at the preliminary stage of the introduction, or at the stage And, in particular, depending on, collected, whether they are pre-pole arc node or pole arc nodes 80. Branch 74, 73 U-shaped conductor fitted on either side of the front wall 22 of the first element 20 thus, to keep, for example by jamming, the input conductor motionless.

Then attach the cut-off system 40, 50 of the device-switch 10 to the first element 2. This step is schematically shown by the arrow In figure 3. Depending on the number of functional blocks included in the system shutdown, the stage can be divided into several stages. In the device-switch 10, the on-off system which includes a mechanical locking unit 40 and one or more thermal magnetic interrupter block 50, the stage contains a first stage of attachment of the locking unit 40 to the front wall 22 of the first element 20. Locking unit 40 is injected, for example, a vertical movement from top to bottom and hold on the first element 20 by means of the device in the form of scenes, dovetail or other device, while blocking any horizontal movement of the block 40. The stage contains a next second stage of attachment, providing a rigid connection of each thermal magnetic unit 50 with the complex consisting of the first element 20 and the block 40. Thermal magnetic block 40 is injected horizontal movement and hold the interlocking unit 40 using the device in the form of scenes, dovetail or other device, until it stops at the first element 20. After rigid connection of each thermal magnetic unit 50 with the locking block 40 off system assembled may be blocked from any vertical movement. So get complex, shown in F. g. During this stage also set nodes, acting on the plungers 78.

Then attach the second element to the first element 20 to close the interrupter housing and provide the ultimate braking system off switch on the interrupter housing. The open form of the camera of the second element 30 provides an easy introduction of the second arc plate block 82 of each pole arc node 80, previously entered into the first element 20 in the arc chute formed in each cavity 39. This step is schematically shown by an arrow With bottom-up figure 5. During phase With the front wall 32 of the second element 30 is injected and hold, for example, by jamming between the two branches 53 and 54 of each U-shaped output conductor, thermal magnetic fixed in each block 50, which provides a complete locking system shutdown.

Attaching the second element 30 to the first element 20 preferably carried out by means of latching 28, 38, or by other means, such as screws. Stage simultaneously in a single operation to completely stop the system off, thanks to the front wall 32, and close the interrupter housing by mounting the second element 30 to the first element 20. Thus provide a simple, fast and effective way to build PR is boron-breaker. After that when using the advanced stage mounting position unit front side 60, contains the nodes of the control and/or visual monitoring device switch 10 ahead of the shutdown systems 40, 50, and receive the assembled device switch 10 (figures 1 and 6).

Besides the already mentioned advantages, this design provides ample opportunity modulation. Each module of the device-switch can be designed and assembled independently of the other modules (pole arc node, locking block, thermal magnetic block, block the front side, and so on)that not only facilitates the replacement of one module to another during maintenance, but also allows you to receive technical solution based on the same type of electric devices-switches, containing various functional units, or a technical solution with a wide range of devices-switches, use some common modules.

1. Electrical appliance switch containing interrupter housing is designed for mounting at least one pole arc node (80)containing two vane interrupter block (81, 82)which are located on both sides of the movable contact bridge (83), is arranged to move along the horizontal axis (X), characterized in that dugo asically body contains

the first element (20)comprising two side walls (24, 25), rear wall (23), front wall (22) and the base (21)formed by a first horizontal side of the device-switch (10), forming a chamber containing a cavity (29) to install the first arc plate of the unit (81) pole arc node

the second element (30)comprising two side walls (34, 35), rear wall (33), front wall (32) and the base (31), formed the second horizontal side of the device-switch (10), opposite the first horizontal direction, forming a chamber containing a cavity (39) for the installation of a second arc plate block (82) pole arc node.

2. Appliance switch according to claim 1, characterized in that in the multipole device-switch each element (20, 30) interrupter housing contains the partition wall (26, 36) between each adjacent pole attached to the rear (23, 33) and the front (22, 32) to the walls and to the base (21, 31) of the element (20, 30).

3. The device switch according to any one of claims 1 or 2, characterized in that each element (20, 30) interrupter housing is designed as a cast part.

4. Appliance switch according to claim 1, characterized in that the front wall (22) and rear wall (32) of the first element (20) and second element (30) is positioned so that SFOR is activated space, sufficient for sliding the pusher (78) for each pole, designed to actuate the movable contact bridge (83) pole.

5. Appliance switch according to claim 4, characterized in that it contains for each pole of the input conductor (75)having U-shaped and comprising a fixed input pin (76), while the front wall (22) of the first element (20) can be introduced into the cavity of the U-shaped each input conductor (75).

6. Appliance switch according to claim 1, characterized in that it contains an on-off system to actuate the movable contact bridge (83) each pole unit of the breaker and for each pole contains an output conductor (55) U-shaped and fixed output pin (56), while the front wall (32) of the second element (30) can be introduced into the cavity of the U-shape of each output conductor (55) thus, to stop the system off switch on the interrupter housing.

7. Appliance switch according to claim 6, characterized in that the shutdown system contains mechanical locking unit (40).

8. Appliance switch according to claim 6 or 7, characterized in that the shutdown system contains thermal magnetic block (50).

9. Appliance switch according to claim 1, characterized in that the first element (20) and the second element (30) are connected by means (28, 38) it locks into place.

10. The method of assembling electric appliance switch (10), characterized in that

exercise introduction (A) each pole arc node (80) inside the first element (20) interrupter housing,

attach (At) system off to the first element (20),

attach (C) a second element (30) interrupter housing to the first element (20) for closing the interrupter housing and locking system shutdown.

11. The method of Assembly of claim 10, wherein the on-off system includes pole output conductor (55) U-shaped, with a jammed system shutdown ensure the introduction of the front wall (32) of the second element (30) in the cavity of the U-shape of each pole output conductor (55).

12. The method of Assembly of claim 10, wherein when the attachment system shutdown shall attach a mechanical locking unit (40) to the first element (20), and then attaching thermal magnetic block (50) to mechanical locking unit (40).

13. The method of Assembly of claim 10, wherein attaching the second element (30) to the first element (20) is realized by means of locking mechanism.

14. The method of Assembly of claim 10, characterized in that exercise introduction pin input conductor (75) U-shaped, inner simple is ansto which allows you to enter the front wall (22) of the first element (20).

15. The method of Assembly of claim 10, characterized in that it further carry out the fastening of the front side (60) of the device-switch (10) to the front of the system shutdown.



 

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11 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: electric commutation device is intended for attachment to a fixation support and contains at least one electric commutation module (2, 3) and at least one module (1) having an additional electric function, in particular - that of differential protection. At least one of the additional modules (1) is located close to at least one commutation module (2, 3). One or every commutation module (2, 3) contains an arc-extinguishing chamber (7, 8). The arc-extinguishing chamber (7, 8) of the module (2, 3) located opposite the additional module (1) has a surface (11, 12) curved relative to the arc-extinguishing chamber inner part to create a space (E, F) inside the chamber that ensures the possibility of accommodating part of the additional module volume therein (1). The ends (13, 14, 15 and 16) of the arc-extinguishing chamber (7, 8) encompass the additional module (1) volume.

EFFECT: improvement of the device operating characteristics without increase of it overall width.

10 cl, 3 dwg

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

FIELD: electrical engineering.

SUBSTANCE: arc suppressor contains an arc suppression chamber (21) formed by a package of de-ionising plates (22), an arc generation chamber (11) delimited by the first side wall (12) and the second side wall (13) and a means for removal of gases generated during electric arc occurrence, the means containing a removal channel (31) positioned behind the second side wall and connected with at least one exchange space (24). The arc suppression chamber contains permanent magnets, at least part of them placed behind the first side wall (12). The removal means has a hole formed partially in the second side wall (13) and opening to the arc suppressor outside.

EFFECT: enhanced effectiveness of arc suppression without increase of the commutation device volume.

10 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: invention pertains to a single-pole disconnecting device. The single-pole disconnecting device is suggested with the following composition: contacting bridge (22) with at least one fixed contact (41, 51) operated together with the contact bridge as well as a tuner bar (26) having a cross bore (21) wherein the contacting bridge is mounted and protruded from each side of the turner bar (26), at that the bar (26) is inserted between two side plates (14) of the disconnecting device. The contacting bridge comprises two seal flanges (27) placed between radial surfaces of the turner bar (26) and side plates (14) respectively. At least one arc blow-out chamber (24) is communicated to open space of the contacting bridge (22). The turner bar (26) comprises at least one channel (29) connected to transversal intake opening (21).

EFFECT: development of the disconnecting device with turner bar and effective sealing facility.

23 cl, 12 dwg

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