KR101053392B1 - Breaker part for gas insulated switchgear - Google Patents

Abstract

The present invention relates to a circuit breaker for a new type of gas insulated switchgear that improves the connection performance between the lower conductor and the movable shaft and improves the overall heat dissipation effect by increasing the surface area without increasing the size of the lower conductor.

To this end, the present invention is installed on the upper and lower portions of the outer frame, the upper surface and the lower surface is composed of the upper end and the lower conductor consisting of a body end is formed of an embossing structure and the connection end receiving the current while protruding from the body end; A vacuum interrupter installed at a position between the upper conductor and the lower conductor of the outer frame and selectively opening or blocking a current; A movable shaft having an upper end penetrating into the body end of the lower conductor and into the vacuum interrupter, and energizing current drawn from the upper conductor to the lower conductor; It is installed on the part of the body end of the lower conductor through which the movable shaft penetrates, and enables the energization between the movable shaft and the lower conductor, and is installed in a state where two or more are stacked on each other, in a direction perpendicular to the penetrating direction of the movable shaft. Provided is a breaker for a gas insulated switchgear comprising: a contactor: formed in a ring-shaped coil spring structure to enable compression and restoration.

Gas Insulated Switchgear, Circuit Breaker, Conductor, Shielding Film, Ring Spring

Description

Circuit Breaker of Gas Insulation switchgear

The present invention relates to a circuit breaker part for a gas insulated switchgear, and more particularly, improves the connection performance between the lower conductor and the movable shaft, and increases the surface area without increasing the size of the lower conductor, thereby improving the overall heat dissipation effect. A new type of breaker structure is improved.

In general, Gas Insulation Switchgear (GIS) uses insulation gas (SF6) with excellent insulation performance and arc extinguishing function in a metal sealed container (tank) as an insulating medium to store conductors and various protective devices for reliability. It is an improved water substation facility, and is composed of various components such as a circuit breaker, a disconnecting switch, and an earthing switch.

The breaker unit of the gas insulated switchgear serves to determine power supply and interruption through the bus, and the manipulator serves to control the breaker operation of the breaker unit.

That is, when the power cut through the bus is determined, the coil spring in the pre-compressed state is restored together with the release of the locking device by the manipulator, and the breaker unit is operated to perform the blocking operation through the link unit connected to the breaker unit.

The existing general breaker unit is largely comprised of an upper conductor, a lower conductor, and a vacuum interrupter, and the lower conductor and the vacuum interrupter are configured to selectively energize by a movable shaft.

In addition, a portion of each of the lower conductors, through which the movable shaft passes, is provided with a single collector for energizing the lower conductor with current transmitted through the movable shaft.

However, since the structure according to the conventional breaker unit described above is formed only as a structure applied to the 2000A class GIS, the structure of the breaker unit is not applicable to the 3000A class GIS.

That is, when applying the conventional circuit breaker to the 3000A class GIS, the size of the lower conductor should be increased, considering that it should be configured to obtain a larger heat dissipation effect, but the lower conductor is located on the other side of the lower conductor. Considering that the conductor should be kept at a constant distance from the conductor at all times, the total width of the breaker part was inevitably increased. The heat dissipation effect may be improved by increasing the thickness of the lower conductor, but if the thickness of the lower conductor is increased, the height of the entire breaker part may also be increased.

Accordingly, conventionally, as shown in Korean Patent No. 10-0890441, the outer surface of the lower conductor is formed in an uneven structure, and the collector which is energized with the movable shaft of the vacuum interrupter is configured in a three-stage laminated structure to maximize the heat dissipation effect. Therefore, it is possible to apply to 3000A GIS.

However, the above-described structure according to the prior art does not have a margin of the temperature rise portion for the contact portion when the conduction current is raised from 3000A class to 3150A class, so that a separate heat dissipation measure is required.

Of course, it is also possible to obtain additional heat dissipation effect by increasing each layer of the collector or by increasing the stacking layer, but in this case, the diameter of the collector must be accompanied, so that it does not match the actual diameter of the moving part of the vacuum interrupter. However, the increase in the volume of the lower conductor due to the increase in the layer of lamination causes a difficulty in implementing its own movable stroke of the vacuum interrupter.

In addition, since the assembly of each of the fault layers of the collector is performed manually for each segment, the overall assemblability is inevitably deteriorated.

In particular, in the case of the 3150A class GIS, a localized heat generation phenomenon occurs at a connection end where current draws or draws current in the upper and lower conductors, thereby causing an additional temperature increase problem.

The present invention has been made to solve the various problems according to the prior art described above, the object of the present invention is to improve the conduction performance between the lower conductor and the movable shaft, without increasing the overall size of the upper conductor and the lower conductor The present invention provides a new type of gas insulated switchgear that enables local localized heat generation to be prevented and improves the overall heat dissipation effect and realizes the insulation distance between phases and the stroke of the vacuum interrupter as it is.

Breaker for gas insulated switchgear device of the present invention for achieving the above object; An upper conductor installed at an upper portion of the exterior frame, the upper and upper circumferences comprising a body end formed of an embossing structure and a connection end protruding from the body end while receiving current; A lower conductor formed at a lower portion of the exterior frame, the circumferential surface comprising a body end formed of an embossing structure and a connection end protruding from the body end to draw current; A vacuum interrupter installed at a position between the upper conductor and the lower conductor of the outer frame and selectively opening or blocking a current; A movable shaft having an upper end penetrating into the body end of the lower conductor and into the vacuum interrupter, and energizing current drawn from the upper conductor to the lower conductor; It is installed on the part of the body end of the lower conductor through which the movable shaft penetrates, and enables the energization between the movable shaft and the lower conductor, and is installed in a state where two or more are stacked on each other, in a direction perpendicular to the penetrating direction of the movable shaft. And a contact formed of a ring-shaped coil spring structure to enable compression and restoration.

Here, between the body end and the connection end of each of the conductors is characterized in that the barrier film protruding outwardly in the form of a partition so as to block the heat generated from the connection end is provided to the body end.

And, according to another embodiment of the gas insulated switchgear for breaker according to another aspect of the present invention for achieving the above object; An upper conductor installed at an upper portion of the exterior frame, the upper and upper circumferences comprising a body end formed of an embossing structure and a connection end protruding from the body end while receiving current; A lower conductor formed at a lower portion of the exterior frame, the circumferential surface comprising a body end formed of an embossing structure and a connection end protruding from the body end to draw current; A blocking film formed between the body end and the connection end of each conductor and protruding outwardly in a partition form to block heat generated from the connection end from being provided to the body end; A vacuum interrupter installed at a position between the upper conductor and the lower conductor of the outer frame and selectively opening or blocking a current; A movable shaft having an upper end penetrating into the body end of the lower conductor and into the vacuum interrupter, and energizing current drawn from the upper conductor to the lower conductor; And a contactor installed at a portion of the body end of the lower conductor through which the movable shaft penetrates, for energizing the movable shaft and the lower conductor.

Here, the blocking film is formed in plural, characterized in that each of the blocking film is formed to be spaced apart from each other.

As described above, the circuit breaker for the gas insulated switchgear according to the present invention has a ring-shaped coil spring structure for contact between the movable shaft and the lower conductor. Not only can it be achieved, but also it can maximize the current carrying capacity with the movable shaft, and also has the effect of securing the temperature rise problem and short-time current carrying capacity of 40kA when energizing the 3150A.

In addition, the breaker for the gas insulated switchgear according to the present invention further comprises a plurality of shielding films at the boundary between the body end and the connection end constituting each conductor, so that the high temperature heat generated by the energization of the connection end is transferred to the body end. Since the flow and conduction can be minimized, the rated capacity can be applied to gas insulated switchgear of 3150A or more.

Hereinafter, a preferred embodiment of the breaker unit for a gas insulated switchgear of the present invention will be described with reference to FIGS. 1 to 5.

1 and 2 are shown a structure of a circuit breaker for a gas insulated switchgear according to a first embodiment of the present invention.

As shown, the breaker for the gas insulated switchgear according to the embodiment of the present invention is largely the exterior frame 100, the upper conductor 200, the lower conductor 300, the vacuum interrupter 400, and the movable part. It comprises a shaft 500, an insulating rod 600, an insulating mounting portion 700, and a plurality of contacts 800 stacked.

This will be described in more detail below for each configuration.

First, the exterior frame 100 is a series of components forming the exterior of the circuit breaker for a gas insulated switchgear.

In this case, various components to be described later are installed on the front surface of the exterior frame 100, and an operation unit (not shown) is installed on the rear surface.

Next, the upper conductor 200 is a conductor into which current is drawn.

The upper conductor 200 is installed on the upper portion of the front surface of the outer frame 100, from the body end 210 forming the body and the front side (front side of the outer frame) of the body end 210 from the wall surface It is formed of a connection terminal 220 which receives the current while being formed to protrude.

At this time, the body end 210 of the upper conductor 200 is formed so that the circumferential surface and the upper surface is embossed structure, thereby maximizing the heat dissipation effect.

Next, the lower conductor 300 is a conductor that receives and draws the current drawn through the upper conductor 200.

At this time, the lower conductor 300 is installed directly below the upper conductor 200 of the front lower portion of the exterior frame 100, the front end of the body end 310 and the body end 310 forming a body. It is comprised by the connection end 320 which protrudes from the side (front side of an exterior frame), and draws an electric current.

At this time, the body end 310 of the lower conductor 300 is formed so that the circumferential surface and the upper surface is embossed structure, thereby maximizing the heat dissipation effect.

In addition, a through hole 311 penetrated up and down is formed in an inner portion of the body end 310 constituting the lower conductor 300 as shown in FIGS. 3 to 5.

Of course, a current may be drawn through the lower conductor 300 and a current may be drawn through the upper conductor 200.

On the other hand, the embodiment of the present invention suggests that the blocking film 230, 330 is further formed in the portion between the body end (210,310) and the connection end 220,320 protruding therefrom of the upper conductor 200 and the lower conductor 300, respectively do.

In this case, the blocking films 230 and 330 block heat from the connection ends 220 and 320 from being provided to the body ends 210 and 310 of the conductors 200 and 300, and further improve heat dissipation performance by additionally securing a heat dissipation area. As a configuration to achieve this, it forms a partition from the boundary between the connection end 220,320 and the body end (210,310) to protrude more outward than the thickness and width of the body end (210,310) or connection end (220,320) Is formed.

That is, the body end (210, 310) or the connection end (220, 320) to meet the conditions, such as the interference between the relative structure (for example, the exterior frame, etc.) and the accurate electrical connection must be satisfied as the additional heat dissipation area Considering that the design change for securing is extremely limited, the additional heat dissipation structure is provided at the part (boundary part between the connection end and the body end) which is not affected by the interference and electrical connection described above.

Particularly, when the connection terminals 220 and 320 generate heat at a more local temperature and higher temperature than other portions, the connection layers 220 and 320 are formed in plural, and each of them is formed to be spaced apart from each other. It is desirable to allow the heat radiation to proceed more smoothly.

Next, the vacuum interrupter 400 selectively blocks or energizes a current drawn through the upper conductor 200 to provide the lower conductor 300.

The vacuum interrupter 400 is installed at a position between the upper conductor 200 and the lower conductor 300 of the front surface of the exterior frame 100.

Next, the movable shaft 500 selectively receives current drawn from the upper conductor 200 according to the driving of the driving shaft 10 operated by the manipulator, and energizes the lower conductor 300. Configuration.

The upper end of the movable shaft 500 is configured to selectively be inserted into the vacuum interrupter 400 through the through hole 311 formed in the body end 310 of the lower conductor 300.

In this case, a fixed contact (not shown) is electrically connected to the upper conductor 200 in the vacuum interrupter 400, and the movable shaft 500 is a movable contact selectively connected to the fixed contact. It will play the role of.

Next, the insulating rod 600 is a series of components that serve to block the current flowing through the movable shaft 500 is provided to the drive shaft 10.

In this case, the insulating rod 600 is formed of an insulating material, and is connected between the movable shaft 500 and the driving shaft 10 to increase the lifting force according to the driving of the driving shaft 10. Delivery to 500 also plays a role.

Next, the insulation mounting part 700 prevents electric current flowing along the upper conductor 200 and the lower conductor 300 from being conducted to the outer frame 100, and the upper conductor 200 and the lower conductor 300. ) And a vacuum interrupter 400 and the like are a series of configurations to be stably installed in the exterior frame 100.

Next, the contactor 800 is a series of components that serve to conduct electricity between the lower conductor 300 and the movable shaft 500.

The contactor 800 is formed in a ring-shaped coil spring structure to be compressed and restored in a direction perpendicular to the penetrating direction of the movable shaft 500 as shown in FIGS. 3 and 4, and the lower conductor ( Located in the through hole 311 of the body end 310 constituting the 300.

At this time, the mounting groove 312 for the stable mounting of the contactor 800 is additionally formed in the inner circumferential surface of the through hole 311 of the body end 310.

In addition, the contactor 800 is provided in three, each of which is installed in a state stacked on each other.

As such, each contact member 800 is formed in a ring-shaped coil spring structure and is formed of three stacked with each other, thereby improving connectivity with the movable shaft 500 without increasing the thickness of the lower conductor 300 to generate heat. This can be minimized, in particular, by maximizing the conduction current capacity, it is possible to ensure the conduction performance for a short time current, it becomes easy to implement the own stroke of the vacuum interrupter (400).

In addition, by installing each contactor 800 in the through hole 311 of the lower conductor 300 can also be made simply, thereby improving the workability.

In the following, the operation of the circuit breaker according to the embodiment of the present invention described above will be described.

First, in an open state of the breaker unit, the movable shaft 500 is spaced apart from a fixed contact (not shown) in the vacuum interrupter 400, and at this time, the current drawn from the upper conductor 200 is lowered. It is not delivered to the conductor 300.

When the operation of the operation unit constituting the gas insulated switchgear is performed in the above state, the driving shaft 10 operated by the operation unit is driven and the movable shaft 500 is raised through the insulating rod 600. Will be moved.

As a result, the movable shaft 500 is energized with the fixed contact in the vacuum interrupter 400, and the lower conductor 300 is also energized through the movable shaft 500 and each contactor.

Therefore, the current drawn through the upper conductor 200 is transferred to the lower conductor 300 through the movable shaft 500 and each contactor, and then drawn out through the lower conductor 300.

At this time, considering that each contact 800 seated in the through hole 310 of the lower conductor 300 is formed in a ring-shaped coil spring structure, even if a frictional force is provided according to the lifting operation of the movable shaft 500. Rotation or change of position is prevented by merely forming a compressed state, and considering the fact that the contact area with the movable shaft 500 is quite large, the conduction current capacity can be secured by maximizing the conduction current capacity. .

In addition, heat is generated at each energized portion during the series of energized processes as described above.

That is, through-holes 311 through which heat is generated from the connection ends 220 and 320 of the upper conductor 200 and the lower conductor 300 and the movable shaft 500 is connected among the body ends 310 of the lower conductor 300. Heat is generated through each contact 800 in the interior.

At this time, the heat generated as described above is conducted to the entire area of the upper conductor 200 and the lower conductor 300, and heat is radiated while exchanging heat with the outside air through the outer surfaces of the body end (210,310) of each conductor (200,300).

In particular, when the outer surfaces of the body ends 210 and 310 of the conductors 200 and 300 are formed in an embossing structure, the heat dissipation effect due to an increase in the heat dissipation area can be maximized.

In addition, high temperature heat is generated at the connection ends 220 and 320 of the respective conductors 200 and 300 by a higher temperature concentration phenomenon than other parts, and the airflow generated by the generated heat is applied to the plurality of blocking films 230 and 330. In addition, the flow to the body ends 210 and 310 is blocked and heat conducting from the connection ends 220 and 320 to the body ends 210 and 310 is conducted along the plurality of blocking films 230 and 330. Heat is exchanged with the outside air through the surface.

At this time, since the blocking films 230 and 330 are provided in plural and are spaced apart from each other, the heat dissipation effect can be maximized by heat exchange through a portion between them, thereby minimizing the temperature rise of the body ends 210 and 310. It becomes possible.

As a result, the breaker part for the gas insulated switchgear according to the present invention ensures sufficient conduction current even when applied to the 3150A class GIS due to the additional configuration of the shielding membranes 230 and 330 without changing the size of each conductor 200 and 300 or structurally changing other structures. In addition, through the structural improvement of the contactor 800, the current carrying capacity of the short-time current set to 45kA can be ensured.

1 is a front view showing the appearance of the breaker for the gas insulated switchgear according to a preferred embodiment of the present invention

Figure 2 is a side view showing for explaining the installation state of the circuit breaker for gas insulated switchgear according to a preferred embodiment of the present invention

Figure 3 is an exploded perspective view showing the structure of the lower conductor and the contactor of the breaker portion for gas insulated switchgear according to a preferred embodiment of the present invention

4 is a plan view showing the installation state of the lower conductor and the contactor of the breaker portion for a gas insulated switchgear according to a preferred embodiment of the present invention.

Figure 5 is a side cross-sectional view showing the installation state of the lower conductor and the contactor of the breaker portion for gas insulated switchgear according to an embodiment of the present invention.

Explanation of symbols for main parts of the drawings

100. Facade frame 200. Upper conductor

300. Lower conductor 210,310. Body

311.Through holes 312.Settling grooves

220,320. Connection 230,330. Barrier

400. Vacuum interrupter 500. Moving shaft

600. Insulation rod 700. Insulation mount

800. Contactor

Claims (4)

An appearance frame forming an appearance; An upper conductor installed at an upper portion of the exterior frame, the upper and upper circumferences comprising a body end formed of an embossing structure and a connection end protruding from the body end while receiving current; A lower conductor formed at a lower portion of the exterior frame, the circumferential surface comprising a body end formed of an embossing structure and a connection end protruding from the body end to draw current; A vacuum interrupter installed at a position between the upper conductor and the lower conductor of the outer frame and selectively opening or blocking a current; A movable shaft having an upper end penetrating into the body end of the lower conductor and into the vacuum interrupter, and energizing current drawn from the upper conductor to the lower conductor; It is installed on the part of the body end of the lower conductor through which the movable shaft penetrates, and enables the energization between the movable shaft and the lower conductor, and is installed in a state where two or more are stacked on each other, in a direction perpendicular to the penetrating direction of the movable shaft. A contactor for a gas insulated switchgear comprising: a contactor formed of a ring-shaped coil spring structure to enable compression and restoration. The method of claim 1, Between the body end and the connection end of each conductor The breaker unit for gas insulated switchgear, characterized in that further formed a barrier film protruding outward in the form of a partition to block the heat generated from the connection end is provided to the body end. An appearance frame forming an appearance; An upper conductor installed at an upper portion of the exterior frame, the upper and upper circumferences comprising a body end formed of an embossing structure and a connection end protruding from the body end while receiving current; A lower conductor formed at a lower portion of the exterior frame, the circumferential surface comprising a body end formed of an embossing structure and a connection end protruding from the body end to draw current; A blocking film formed between the body end and the connection end of each conductor and protruding outwardly in a partition form to block heat generated from the connection end from being provided to the body end; A vacuum interrupter installed at a position between the upper conductor and the lower conductor of the outer frame and selectively opening or blocking a current; A movable shaft having an upper end penetrating into the body end of the lower conductor and into the vacuum interrupter, and energizing current drawn from the upper conductor to the lower conductor; And, And a contactor installed at a portion of the body end of the lower conductor, through which the movable shaft penetrates, for conducting electricity between the movable shaft and the lower conductor. The method according to claim 2 or 3, The blocking film is formed in plurality, The circuit breaker unit for the gas insulated switchgear, characterized in that each of the blocking film is formed to be spaced apart from each other.

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