KR101621765B1 - Switch-gear - Google Patents

Abstract

The present invention relates to an opening / closing apparatus capable of achieving miniaturization and low cost, and reducing the amount of heat generated, by providing a so-called hoop shield which is a conductor or a floating body and is a filamentous or semi-magnetic body.
The opening and closing apparatus of the present invention is an opening and closing apparatus for opening and closing between the first electrode and the second electrode through movement of at least one of a first electrode and a second electrode. And a floating SO shield disposed to surround at least a part of the space between the first electrode and the second electrode. The superhigh shield is a paramagnetic material or a semi-magnetic material but a conductor.
According to the opening / closing apparatus of the present invention, it is possible to reduce the soho time and the electric field relaxation effect by the eddy current, minimize the distance between the electrodes, and further reduce the size of the equipment and reduce the cost can do. Further, the amount of heat generated by the opening / closing apparatus itself can be minimized.

Description

SWITCH-GEAR

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening and closing apparatus, and more particularly, to an opening and closing apparatus capable of achieving small size and low cost, and capable of reducing the amount of heat generation, by providing a soffit shield having a conductor and a floating body, .

A switch-gear is a general term for an apparatus or an apparatus used for the purpose of constituting, separating or changing an electric circuit, and includes not only a mechanism such as a breaker, a disconnector, a fuse, but also a bus, a breaker, , Gas insulated switch-gear (GIS) and metal clad switch-gear (MCGS) that are embedded in a metal case.

A circuit breaker is a type of switchgear, which means a device that can open and close an abnormal state, especially a short-circuited state, as well as a steady-state electric circuit. The International Standard (IEC) defines "an opening / closing device designed to input, energize and shut off a steady-state current and to be energized and energized for a certain period of time in a predetermined abnormal condition such as a short circuit" .

The circuit-breaker shall: (1) be thermally and structurally robust in the input state to a good conductor, in abnormal conditions such as normal or short-circuit fault conditions, (2) maintain good isolation between phase and phase with good insulation in open state (3) When the breaker is charged, the generated current should be normally shut off at rated or less without abnormal voltage generation. (4) When the breaker is opened, the circuit should be disconnected quickly and safely without damage to the contactor.

Circuit breakers are classified into direct current type and alternating current type according to the circuit to be used. They are classified into magnetic type and power type type in accordance with the arc extinguishing method. The circuit breaker (ACB), the inflow breaker (OCB) (MBB), air circuit breaker (ABB), vacuum breaker (VCB) and gas breaker (GCB).

A gas circuit breaker is a circuit breaker that uses an inert gas (hereinafter referred to as "SOHO gas"), which is a special gas such as sulfur hexafluoride (SF ₆ ), as a soot medium. Gas breaker is characterized by excellent physical, chemical and electrical properties of SOH gas, excellent arc extinguishing ability, stable arc, fast recovery of insulation, and suitable for high voltage high current cut. Unlike the air circuit breaker, it does not emit no gas at the time of shutdown, so there is no noise pollution, and stable shutdown is possible even with a small current interruption such as excitation current interruption of the transformer. It has the advantages that it is strong even under severe conditions such as short-circuit line breakdown, out-of-phase shutdown, abnormal gauge, and small size because of less occurrence of switching overvoltage, Recently, the use of air circuit breakers and air circuit breakers has been rapidly increasing.

Such a gas circuit breaker can be classified into a puffer type, a rotary arc type, a thermal expansion type, and a hybrid extinction type according to the arc extinguishing method have.

1A to 1C are schematic cross-sectional views of a general gas insulated switchgear. FIG. 1A shows the electrodes connected to each other. FIG. 1B shows a moment when the electrodes are separated from each other. FIG. Sectional view of a general gas insulated switchgear having a gas insulated switchgear.

1A and 1B, a general gas insulated switchgear 10 includes a first electrode 11 and a second electrode 12 which is electrically disconnected by being inserted into the first electrode 11 and is disconnected .

The main nozzle 13 is positioned so as to surround the ends of the first electrode 11 and the second electrode 12. Referring to FIG. 1B, the main nozzle 13 is fixed to the first electrode 11 side, where an arc is generated at a narrow central portion, and an arc is generated through the flow of the SOH gas into the main nozzle 13 It is called.

If the second electrode 12 is separated from the first electrode 11 as shown in FIG. 1B, an arc is generated in the main nozzle 13 between the first electrode 11 and the second electrode 12, (A) is generated. This arc (A) is extinguished by the soot gas which is strongly ejected from the first electrode (11) side.

If the distance between the first electrode 11 and the second electrode 12 is not sufficiently large even if the first electrode 11 and the second electrode 12 are spaced apart and the arc A is extinguished, A recall may occur between the electrode 11 and the second electrode 12. Such a recall is an insulation breakdown phenomenon that occurs after a lapse of more than a quarter of a cycle after the current zero point in a commercial frequency voltage. If such a recall occurs, a large transient voltage may be generated, thereby threatening the reliability of the system. Therefore, in the gas insulated switchgear, it is important to avoid reconsideration and to prevent the occurrence of dielectric breakdown.

It is necessary to improve the open / close speed between the first electrode 11 and the second electrode 12, to increase the separation distance, to increase the injection speed of the SOG gas, Resulting in large size and high cost.

Thus, the electric field generated from the first electrode 11 and the second electrode 12 is relaxed between the first electrode 11 and the second electrode 12 to increase the speed of the soot , Technology to prevent reconsideration is being developed.

For example, as shown in FIG. 1C, a shield 14 made of iron is inserted into the main nozzle 13 to reduce the electric field between the first electrode 11 and the second electrode 12 An isolation switching device 10a has been disclosed (CYPeng et al., RESEARCH ON THE ELECTRIC FIELD CONTROLLING FOR THE ARC-CHUTE OF HIGH VOLTAGE SF ₆ CIRCUIT BREAKER, 18 ^th International Symposium on High Voltage Engineering, p. 59, August 25-30 , 2013)

As the electric field is relaxed as described above, it is possible to some extent to prevent the arc and recall of the arc. However, since the structure having the stronger field relaxation effect or the like further improves the soho performance and the reclosing prevention performance, There is room for the switchgear to be miniaturized. Also, since the superhield shield 14 generates heat by electric and magnetic fields and becomes a high temperature, the stability of the equipment becomes a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned technical needs, and it is an object of the present invention to provide a shield for superhaving a conductor which is a conductor or a ferromagnetic body, And an opening / closing device capable of reducing a heat generation amount.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

An opening and closing apparatus according to the present invention for solving the above problems is an opening and closing apparatus for opening and closing between the first electrode and the second electrode through movement of at least one of a first electrode and a second electrode. And a floating SO shield disposed to surround at least a part of the space between the first electrode and the second electrode. The superhigh shield is a paramagnetic material or a semi-magnetic material but a conductor.

According to another aspect of the present invention, the superhield shield has a through hole through which the first electrode or the second electrode can pass, and the through hole is opened or closed to the side thereof. At least one of the superhigh shields is provided, and when a plurality of superhigh shields are provided, they are spaced apart from each other.

According to still another aspect of the present invention, the ceiling shield has a through hole through which the first electrode or the second electrode can pass, and has a spiral wound shape.

According to still another aspect of the present invention, the superhigh shield is ring-shaped.

According to still another aspect of the present invention, the superhigh shield has at least one through hole.

According to another aspect of the present invention, the through-hole is formed long along a virtual line connecting the center of the first electrode and the center of the second electrode.

According to another aspect of the present invention, the through-hole is formed long to form an angle of more than 0 degrees with an imaginary line connecting the center of the first electrode and the center of the second electrode.

According to another aspect of the present invention, there is further provided a main nozzle for guiding the flow of the SOH gas for extinguishing an arc occurring between the first electrode and the second electrode, the main nozzle being an insulating material. The superhigh shield is embedded in the main nozzle or located outside the main nozzle.

According to still another aspect of the present invention, an inner side surface is formed on the inner side of the ceiling shield for guiding the flow of the SOH gas for extinguishing arc generated between the first electrode and the second electrode.

According to still another aspect of the present invention, the superhigh shield contains at least one of aluminum, copper, magnesium, tungsten, platinum, gold, tin, manganese and alloys thereof.

According to another aspect of the present invention, one of the first electrode and the second electrode is a movable arc electrode, and the other is a fixed arc electrode. A first main contact positioned outside the first electrode and a second main contact positioned outside the second electrode. And the small shield is arranged inside the first main contactor and the second main contactor.

According to still another aspect of the present invention, both the first electrode and the second electrode are movable arc electrodes. A first main contact positioned outside the first electrode and a second main contact positioned outside the second electrode. And the small shield is configured to be disposed inside the first main contactor and inside the second main contactor.

According to still another aspect of the present invention, the first main contactor and the second main contactor are inserted later than the first electrode and the second electrode, and are cut off first.

According to still another aspect of the present invention, the first electrode has a hollow into which the second electrode can be inserted. At least one slit is formed on the side surface of the first electrode. An angle formed by a line connecting one end of the slit and the center of the hollow and a line connecting the other end of the slit and the center of the hollow is more than 0 degrees when viewed from the side where the second electrode is inserted.

According to still another aspect of the present invention, the opening and closing device is a gas insulated switch-gear.

According to still another aspect of the present invention, the opening / closing device is any one of a thermal expansion type gas insulated switchgear, a puffer type gas insulated switchgear, and a composite gas insulated switchgear.

According to the opening / closing apparatus of the present invention, it is possible to reduce the soho time and the electric field relaxation effect by the eddy current, minimize the distance between the electrodes, and further reduce the size of the equipment and reduce the cost can do. Further, the amount of heat generated by the opening / closing apparatus itself can be minimized.

1A to 1C are schematic sectional views of a general gas insulated switchgear.
2 is a schematic cross-sectional view of an opening and closing apparatus according to an embodiment of the present invention.
FIG. 3 is a simulation graph showing the amount of heat generated according to the material of the soot shield according to time.
4 is a conceptual diagram for explaining the principle that the arc is extinguished by an eddy current generated in the arc shield.
5 is a schematic cross-sectional view of an opening and closing apparatus of another embodiment of the present invention.
6 is a schematic cross-sectional view of an opening / closing apparatus of another embodiment of the present invention.
7 is a schematic cross-sectional view of an opening and closing apparatus according to another embodiment of the present invention.
8A is a schematic partial cross-sectional view of an opening and closing apparatus of another embodiment of the present invention.
8B is a schematic perspective view of the ceiling shield of Fig. 8A.
FIG. 9A is a schematic partial cross-sectional view of a switching device according to another embodiment of the present invention. FIG.
FIG. 9B is a schematic perspective view of the ceiling shield of FIG. 9A. FIG.
Fig. 10A shows a modified example of the superhigh shield shown in Fig. 8B.
Fig. 10B shows a modified example of the superhigh shield shown in Fig. 9B.
11 is a cross-sectional view specifically showing the first electrode in the opening and closing apparatus of Fig.
Figure 12 is a schematic perspective view of the first electrode of Figure 11;
13 is a conceptual diagram for explaining the shape of the slit in FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

In the present specification, when the same reference numerals are used to denote the same elements even when different reference numerals are used, the same reference numerals are used as much as possible.

The sizes and thicknesses of the individual components shown in the figures are shown for convenience of explanation and the present invention is not necessarily limited to the size and thickness of the components shown.

Hereinafter, embodiments of the opening / closing apparatus of the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a schematic cross-sectional view of an opening / closing device according to an embodiment of the present invention, and FIG. 3 is a simulation graph showing a heating amount according to a material of the silencer.

Referring to FIG. 2, the opening and closing apparatus 100 of the present embodiment includes a first main contact 110, a second main contact 120, a first electrode 130, a second electrode 140, A nozzle 150, a small shield 160, and an auxiliary nozzle 170.

For reference, the opening and closing apparatus of this embodiment is described as an example applied to an opening / closing apparatus according to a thermal expansion type, but this is for convenience of explanation, and the switching apparatus of the present invention is limited to an opening / It should be noted that it is not built. The opening and closing apparatus of this embodiment may be applied to a puffer type or hybrid type soho system.

The first main contact 110 and the second main contact 120 are located outside the first electrode 130, the second electrode 140 and the main nozzle 150 to be described later, In which the main circuit is energized.

The first electrode 130 functions as a moving arc contactor and the second electrode 140 also functions as a fixed statorly arc contactor. Also, both the first electrode 130 and the second electrode 140 may function as a movable arc contactor. The first electrode 130 and the second electrode 140 take charge of an arc generated in the circuit during the opening and closing operation to prevent damage to the main contacts 110 and 120.

The first main contact 110 and the second main contact 120 are inserted later than the first electrode 130 and the second electrode 140 and are first cut off to prevent damage by the arc, Only between the first electrode 130 and the second electrode 140.

The first electrode 130 has a hollow 131 therein and the second electrode 140 is inserted into the hollow 131 to be electrically connected thereto. It should be noted that the shape of the first electrode 130 and the second electrode 140 is exemplary and can be modified in various forms.

The main nozzle 150 is disposed so as to surround an end of the first electrode 130 and an end of the second electrode 140 and is formed between the first electrode 130 and the second electrode 140 It guides the flow of SOHO gas for SOHO of arc. The main nozzle 150 is fixed to the first electrode 110 side in the embodiment of FIG. The main nozzle 150 may be made of an insulating material, for example, Teflon.

The inner surface 151 of the main nozzle 150 is formed to have a narrow width at the arc generating portion and a wider width toward the first electrode 130 side and the second electrode 140 side. This is because the gas flow rate for the SOHO is the largest in the arc generation portion.

Here, the gas for SOHO is supplied from the expansion chamber 152, which is merely an example of adopting the thermal expansion type. For example, in the case of adopting a pulper type, a gas can be supplied by providing a popper cylinder and a pulper piston. Such a gas supply system follows a known construction of a conventional opening and closing apparatus.

The gas for the soot is supplied from the expansion chamber 152, that is, from the first electrode 130 side to the inside of the main nozzle 150, and after the arc is extinguished, the first electrode 130 and / 140).

On the other hand, in the case of this embodiment switchgear is gas-insulated switchgear, and can extinguishing gas is excellent in extinguishing performance and the insulating performance of the gas that is used, for example, may be a SF ₆ gas, SF ₆ gas is 23 900 times that of carbon dioxide gas Of global warming effect. From the viewpoint of environmental preservation, a gas having a global warming coefficient smaller than that of SF ₆ gas may be used. Examples of such gas include air, carbon dioxide, oxygen, nitrogen, or a mixed gas of these gases.

As shown in FIG. 2, when the first electrode 130 and the second electrode 140 start to be separated from each other in order to disconnect between the first electrode 130 and the second electrode 140 in the event of an accident, A high-temperature arc is generated between the electrode 130 and the second electrode 140. In addition, when the first electrode 130 and the second electrode 140 are completely separated from each other, an arc may be generated when a brain shock or the like occurs. Due to such arcs, the gas around the arc is rapidly expanded, and the inner surface 151 of the main nozzle 150 or the electrodes 130 and 140 may be partially sparged.

Accordingly, rapid arcing is an important problem in terms of maintenance of the apparatus. In order to achieve such rapid exhalation, a conventional gas insulated switchgear has adopted a method of increasing the injection speed of the SOG gas. Also, as shown in FIG. 1C, a method of inserting a soot shield into a main nozzle with a material containing iron to relax the electric field is adopted.

The opening and closing apparatus 100 of the present embodiment includes a small shield 160 which is a conductor or a paramagnetic body or a non-magnetic body, unlike the conventional art.

As shown in FIG. 2, the shield 160 is embedded in the main nozzle 150, and when the first electrode 130 and the second electrode 140 are short-circuited, the first electrode 130 and the second electrode 140 140 of the first embodiment. That is, the arc shield 160 is located outside the arc occupation space between the first electrode 130 and the second electrode 140. From this position, the ceiling shield 160 alleviates the electric field in the space between the first electrode 130 and the second electrode 140, and obtains a softer effect due to the eddy current described later.

The ceiling shield 160 is not electrically connected to any part of the ceiling shield 160 but is floated, and may not be buried in the main nozzle 150. For example, the ceiling shield 160 may be located outside the main nozzle 150. In addition, the ceiling shield 160 itself may be formed of the main nozzle 150. In other words, an inner surface for guiding the flow of the SOH gas to extinguish the arc generated between the first electrode 130 and the second electrode 140 may be formed inside the SOHO shield 160.

Further, even when the main nozzle 150 is applied to an opening / closing apparatus to which the main nozzle 150 is not applied, at least part of the space between the first electrode 130 and the second electrode 140 may be surrounded and floated.

The shield 160 is made of a conductor or a paramagnetic material or a ferromagnetic material and may contain at least one of aluminum, copper, magnesium, tungsten, platinum, gold, tin, manganese and alloys thereof. Of these, it is preferable to adopt a material having excellent conductivity. As a material characteristic of the silencer shield 160, the effect of the eddy current on the arc can be increased, the silencer effect can be increased, and the amount of heat generated by the silencer shield 160 itself can be reduced.

Referring to FIG. 3, when the shield 160 is formed as a SS400 material containing iron (shown by a dotted line in FIG. 3), the shield 160 is formed of aluminum as a conductor, (Shown by a solid line in Fig. 3), and when the soot shield 160 is formed of copper as a conductor which is a semi-magnetic body (indicated by a chain line in Fig. 3), the calorific value is small. Here, it can be seen that the heat generating amount is the smallest when the soot shield 160 is made of copper having high conductivity. In addition, the deviation of the calorific value, that is, the peak-to-peak is also reduced as shown in FIG. 3 when using the paramagnetic material or the semi-magnetic material, thereby improving the thermal performance.

For reference, the above simulation results were obtained by using a FLUX simulation program, and were performed under the condition that a cutoff current of 40 kA was applied.

The auxiliary nozzle 170 is disposed so as to surround the end portion of the first electrode 130. The auxiliary nozzle 170 serves to transfer the gas to the arc generating portion through the hollow 131 of the first electrode 130 and may be made of the same insulating material as the main nozzle 150.

4 is a conceptual diagram for explaining the principle that the arc is extinguished by an eddy current generated in the arc shield.

4, when a fault current flows from the first electrode 130 side to the second electrode 140 side into the space in the main nozzle 150, a magnetic field such as a dotted line is generated around the fault current due to the fault current, . Such a magnetic field affects the space occupied by the soot shield 160, and a change in the magnetic field causes an eddy current to flow inside the soot shield 160. This is caused by electromagnetic induction.

,

로 도시됨).These eddy currents flow in the direction of generating a magnetic field opposite to the change of the magnetic field by the electromagnetic induction law of Faraday to resist the change of the magnetic field. According to this, an eddy current is generated so that a magnetic field is formed in the right direction opposite to the direction of the magnetic field (the left direction in Fig. 4) formed by the fault current. Thus, eddy currents are formed in the direction in which the upper side of the superhigh shield 160 protrudes outward and the lower side enters inward (FIG. 4

,

As shown in FIG.

로 도시된 부분) 에 의해 아크를 형성하는 임의의 전자에 영향을 미치며 반경 R를 가지는 자기장 (도 4에서 점선으로 도시됨) 이 형성된다. 자기장 내에서 전자가 이동을 할 경우 F=qν×B 의 로렌츠의 법칙에 의해 아크 내에서 이동하는 전자가 힘을 받아 방향이 변화된다. 다시 말해서, 아크 내의 전자는 도 3에서와 같이 왼쪽 방향을 가지는 와전류에 의한 자기장의 영향 하에 놓이게 되고, 이로 인하여 로렌츠의 힘을 받게 된다. 구체적으로는 전자는 전류의 방향과 반대 방향으로 이동되므로, 왼쪽으로의 자기장 하에서는 아래 방향으로 힘이 작용되게 된다.On the other hand, such an eddy current forms its own magnetic field around it, and the eddy current (see Fig. 4

(Shown by dashed lines in Fig. 4) having a radius R, which affects any electrons that form an arc, When electrons move in a magnetic field, electrons moving in the arc under the force of F = qν × B change their direction. In other words, the electrons in the arc are subjected to the influence of the magnetic field caused by the eddy current having the leftward direction as shown in FIG. 3, thereby being subjected to the Lorentz force. Specifically, the electrons are moved in the direction opposite to the direction of the current, so that force is applied downward under the magnetic field to the left.

By the force acting on the electrons forming the arc (that is, the Lorentz force), the arc is disturbed in such a way that it is not formed in a linear direction but is vortexed, so that a soho effect can be obtained.

The soffing effect due to the eddy current can be increased by forming the soot shield 160 into a conductor which is a paramagnetic material or a diamagnetic material, and a higher eddy current can be obtained as the conductivity is higher.

Further, in addition to the arc effect due to the eddy current, the arc shield 160 alleviates the electric field around the space where the arc is generated, thereby alleviating the arc generation.

As described above, since the superhigh shield 160 is formed of a conductor which is a paramagnetic material or a semi-ferromagnetic material, it is possible to reduce the soho effect and the electric field easing effect by the eddy current and to minimize the distance between the electrodes, The size of the equipment can be further downsized and the cost can be reduced. Also, the amount of heat generated by the superhigh shield 160 can be reduced.

On the other hand, by configuring various shapes of the soot shield 160, the electric field between the first electrode 130 and the second electrode 140 can be further relaxed and the disturbance of the arc can be increased.

5 is a schematic cross-sectional view of an opening and closing apparatus of another embodiment of the present invention.

5 is different from the opening / closing device 100 of FIG. 2 only in the configuration of the soho shield 260, only the difference is described mainly, and description of other configurations Is omitted.

Referring to FIG. 5, the small shield 260 of the opening and closing apparatus 200 of this embodiment is divided into a plurality of openings. That is, the ceiling shield 260 is divided into a first member 260a and a second member 260b.

2, it is possible to expect an effect of reducing the internal field fluctuation width (equal field effect) as compared with the superhigh shield 160 of FIG. 2, It can be further reduced.

6 is a schematic cross-sectional view of an opening / closing apparatus of another embodiment of the present invention.

6 is different from the opening / closing device 100 of FIG. 2 only in the configuration of the small shield 360, only the difference is described mainly, and the description of other configurations Is omitted.

Referring to FIG. 6, one or more small shields 360 of the opening and closing apparatus 300 of the present embodiment are provided, and when they are plural, they are spaced apart from each other. Each of the ceiling shields 360 has a through hole through which the first electrode 330 or the second electrode 340 can pass (in this embodiment, only the second electrode 340 is passed). For example, the ceiling shield 360 may have a ring shape. However, the small shield 360 may have a ring shape as a whole and may be discontinuously formed so that the through hole may be opened to the side.

6, the cross section of the small shield 360 may be circular to facilitate generation of an eddy current and to alleviate an electric field, but the present invention is not limited thereto, and the shape of the cross section may be set to various shapes such as a rectangle.

7 is a schematic cross-sectional view of an opening and closing apparatus according to another embodiment of the present invention.

7 is different from the opening / closing device 300 of FIG. 6 only in that the configuration of the soot shield 460 is the same as that of the opening / closing device 300 of FIG. 6, and therefore the differences will be mainly described. Is omitted.

Referring to FIG. 7, the shield 460 of the popper 400 of the present embodiment has a through hole through which the first electrode 430 and the second electrode 440 can pass, and the spiral wound shape .

7, the cross section of the small shield 460 may be circular to facilitate generation of an eddy current and to alleviate an electric field, but the present invention is not limited thereto, and the shape of the cross section may be set to various shapes such as a rectangle.

When the superhigh shield 460 having the same shape as that of the present embodiment is adopted, the arc can be adjusted to be bent in a spiral shape by the force of the electric field and the eddy current. As a result, the arc end point of the arc becomes faster.

Fig. 8A is a schematic partial cross-sectional view of an opening / closing apparatus according to another embodiment of the present invention, and Fig. 8B is a schematic perspective view of the furnace shield of Fig. 8A. For the sake of convenience, FIG. 8A shows a part of the small shield 560 exposed to the outside.

The opening / closing apparatus 500 of FIG. 8A differs from the opening / closing apparatus 100 of FIG. 2 only in the configuration of the soot shield 560, and the other configurations are the same. Therefore, the differences are mainly described. Is omitted.

8A and 8B, the small shield 560 employed in the opening and closing apparatus 500 of the present embodiment follows a virtual line connecting the center of the first electrode 530 and the center of the second electrode 540 And at least one through hole 561 formed to be long. Here, the through hole 561 means a hole formed so as to penetrate through the surface of the ceiling shield 560.

The through hole 561 can increase the electric field relaxation effect of the soot shield 560 and further increase the arc disturbance effect caused by the eddy current.

FIG. 9A is a schematic partial cross-sectional view of a switching device according to another embodiment of the present invention, and FIG. 9B is a schematic perspective view of the soot shield of FIG. 9A. For the sake of convenience of explanation, FIG. 8A shows the entirety of the small shield 660 exposed to the outside.

9A and 9B, the small shield 660 employed in the opening and closing apparatus 600 of the present embodiment is provided with an oblique line 630 extending from the center of the first electrode 630 to the center of the second electrode 640 And at least one through hole 661. That is, the through-hole 661 is formed to be longer than an imaginary line connecting the center of the first electrode 630 and the center of the second electrode 640 with an angle of more than 0 degrees.

Here, the shape of the through hole 661 of the small shield 660 can be variously set, such as a straight line, a curved line, or the like when the small shield 660 is deployed.

The through hole 661 can increase the electric field relaxation effect of the soot shield 660 and can induce the movement of electrons in the space where the arc is generated to be spirally driven. Thus, the electric field can be more effectively mitigated, the arc can be disturbed, and the arc can be more easily extinguished.

FIG. 10A shows a modified example of the superhigh shield shown in FIG. 8B, and FIG. 10B shows a modified example of the superhield shield shown in FIG. 9B.

As shown in FIG. 10A, a plurality of small shields 560 'may be provided with a small shield. Here, the ceiling shields 560 'are separated from each other as shown in the sectional view of FIG. 5, and each has a through hole having a shape as shown in FIG. 8B.

In addition, as shown in FIG. 10B, a plurality of small shields 660 'may be provided with small shields. Here, the ceiling shields 660 'are separated from each other as shown in the sectional view of FIG. 5, and each has a through hole having a shape as shown in FIG. 9B.

12 is a schematic perspective view of the first electrode of FIG. 11, and FIG. 13 is a conceptual view for explaining the shape of the slit of FIG. 12. FIG. 11 is a cross- .

At least one slit is formed on the side surface of the first electrode 130 so that the second electrode 140 can be inserted into the hollow 131 in the first electrode 130. In general, the slit is formed parallel to the imaginary line connecting the center of the first electrode 130 and the center of the second electrode 140.

The slit 132 in this embodiment is formed as shown in Figs. 11 and 12, unlike a general slit. This will be described in detail below.

11 and 12, a side surface of the first electrode 130 may be provided with at least one slit (not shown) so as to form an angle of more than 0 degrees with an imaginary line connecting the center of the first electrode 130 and the center of the second electrode 140 132 are formed. That is, the slit 132 is formed obliquely to a virtual line connecting the center of the first electrode 130 and the center of the second electrode 140.

Referring to Fig. 13, the shape of the slit 132 will be described in a different manner. 13 shows the first electrode 130 on the side where the second electrode 140 is inserted. The slit 132 has one end 132a on the second electrode 140 side and the other end 132b on the opposite side. The slit 132 is formed such that the angle a formed by the line connecting the one end portion 132a to the center C of the hollow portion 131 and the line connecting the other end portion 132b to the center C of the hollow portion 131 is greater than 0 degrees .

The slit 132 may be straight or curved when the first electrode 130 is expanded, but is not limited thereto.

The size of the hollow 131 in the first electrode 130 can be changed by the slit 132 and the second electrode 140 can be firmly fixed in the hollow 131. [ In addition, by flowing a current flowing along the length direction of the first electrode 130 obliquely, a magnetic field due to the current is caused to protrude toward the second electrode 140 side. In contrast, when the slit 132 is formed in a general shape so as to follow an imaginary line connecting the center of the first electrode 130 and the center of the second electrode 140, the slit 132 may be formed parallel to the longitudinal direction of the first electrode 130 The magnetic field due to the flowing current only affects the side surface of the first electrode 130 but does not affect the second electrode 140 side.

In order to effectively form a magnetic field protruding toward the second electrode 140, it is preferable that the slit 132 be more inclined with respect to a virtual line connecting the center of the first electrode 130 and the center of the second electrode 140. In other words, referring to FIG. 13, it is preferable that the value of a is large. The slope of the slit 132 may be variously set. For example, a may be 45 degrees, 90 degrees, 135 degrees, 180 degrees, 360 degrees, 540 degrees, 720 degrees or more.

The number of the slits 132 is 1 or more and can be set in various ways, but it is preferable that a larger number of the slits 132 have an effect of flowing current obliquely.

A magnetic field is generated from the first electrode 130 to the second electrode 140 side by the slit 132 and accordingly the negative charge of the arc occupying this space is subjected to the Lorentz force, (140), but is disturbed.

When the slits 132 are used at the same time as the above-mentioned superhigh shields 160 to 660, the effect of the superhighness can be further increased, and a faster arc ceasing can be expected.

The above-described superhield shields 160 to 660 may be applied to the above-described gas insulation switching devices 100 to 600, but the present invention is not limited thereto, and can be applied to other types of gas insulation switching devices. In addition to the gas insulated switchgear, there may also be provided an open / close device according to the air circuit breaker ACB, an open / close device according to the inlet breaker OCB, an open / close device according to the magnetic circuit breaker MBB, (VCB), and the like.

Specifically, the opening and closing apparatuses 100 to 600 include a moving device and first electrodes 130 to 630 for moving at least one of the first electrodes 130 to 630 and the second electrodes 140 to 640, And an expansion chamber (152 to 652) that receives the internal gas expanded by the arc generated when the second electrodes (140 to 640) are separated from each other and injects the expanded internal gas into a space where an arc is generated, An inflatable gas insulated switchgear can be constructed.

The opening and closing apparatuses 100 to 600 may include a pump cylinder and a pulper piston instead of the expansion chambers 152 to 652 to constitute a puffer type gas insulated switchgear.

The above-described opening and closing apparatuses 100 to 600 include the above-described expansion chambers 152 to 652 and the popper piston, so that a composite type gas insulated switchgear can be constructed.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

110, 210, 310, 410, 510, 610 ... The first main contact
120, 220, 320, 420, 520, 620 ... The second main contact
130, 230, 330, 430, 530, 630 ... The first electrode
132 ... Slit
140, 240, 340, 440, 540, 640 ... The second electrode
150, 250, 350, 450, 550, 650 ... Main nozzle
152, 252, 352, 452, 552, 652 ... Expansion chamber
160, 260, 360, 460, 560, 660, 560 ', 660' ... Shield for Soho
170, 270, 370, 470, 570, 670 ... Auxiliary nozzle
100, 200, 300, 400, 500, 600 ... The opening / closing device

Claims (16)

An opening and closing apparatus for opening and closing between a first electrode and a second electrode through movement of at least one of a first electrode and a second electrode,
And a shield for floating gate arranged to surround at least a part of the space between the first electrode and the second electrode,
The quenched shield may be a paramagnetic material or a semi-
Wherein the ceiling shield has at least one through hole,
Wherein the through-hole is formed long along an imaginary line connecting the center of the first electrode and the center of the second electrode . The method according to claim 1,
Wherein the shield for shielding has a through hole through which the first electrode or the second electrode can pass, the through hole being opened or closed at the side thereof,
Wherein one or more shields are provided, and when the plurality of shields are a plurality of shields, the shields are spaced apart from each other. The method according to claim 1,
Wherein the superhigh shield has a through hole through which the first electrode or the second electrode can pass, and has a spirally wound shape. The method according to claim 2 or 3,
Characterized in that the ceiling shield is ring-shaped. delete delete The method according to claim 1,
Wherein the through hole is formed to be longer than an imaginary line connecting the center of the first electrode and the center of the second electrode to an angle of more than 0 degrees. The method according to claim 1,
Further comprising a main nozzle for guiding the flow of the SOH gas to extinguish an arc generated between the first electrode and the second electrode,
Wherein the fine shield is embedded in the main nozzle or located outside the main nozzle. The method according to claim 1,
Wherein an inner surface for guiding the flow of the SOH gas for extinguishing an arc generated between the first electrode and the second electrode is formed in the inside of the SOHO shield. The method according to claim 1,
Characterized in that the annealing shield contains at least one of aluminum, copper, magnesium, tungsten, platinum, gold, tin, manganese and alloys thereof. The method according to claim 1,
Wherein one of the first electrode and the second electrode is a movable arc electrode and the other is a fixed arc electrode,
Further comprising a first main contact positioned outside the first electrode and a second main contact positioned outside the second electrode,
Wherein the shield for shielding is arranged inside the first main contactor and the second main contactor. The method according to claim 1,
Wherein the first electrode and the second electrode are both movable arc electrodes,
Further comprising a first main contact positioned outside the first electrode and a second main contact positioned outside the second electrode,
Wherein the small shield is configured to be disposed inside the first main contactor and inside the second main contactor. 13. The method according to claim 11 or 12,
Wherein the first main contactor and the second main contactor are charged later than the first electrode and the second electrode, and are shut off first. The method according to claim 1,
Wherein the first electrode has a hollow into which the second electrode can be inserted,
At least one slit is formed on a side surface of the first electrode,
And an angle formed by a line connecting one end of the slit and the center of the hollow and a line connecting the other end of the slit and the center of the hollow is greater than 0 degrees when viewed from the side where the second electrode is inserted , Opening and closing device. The method according to claim 1,
Wherein the opening / closing device is a gas insulated switch-gear. 16. The method of claim 15,
Wherein the opening / closing device is any one of a thermal expansion type gas insulated switchgear, a puffer type gas insulated switchgear, and a composite gas insulated switchgear.

Images