JPH0822754A - Puffer type gas circuit breaker - Google Patents

Abstract

(57) [Abstract] [Purpose] Improves the exhaust efficiency and cooling efficiency of hot gas generated by the arc, and ensures sufficient insulation between the contacts and the arc-extinguishing chamber of the other phase. Secure. [Structure] The fixed contact portion 1 and the movable contact portion 2 are arranged to face each other. The fixed contactor portion 1 includes a fixed arc contactor 3 and a fixed side support portion 4 that covers the periphery thereof. Inside the fixed side support portion 4 in the outer peripheral portion of the fixed arc contactor 3, a plurality of metal straightening plates 21 extending in the axial direction of the fixed arc contactor 3 are provided.
Is fixed. The plurality of straightening vanes 21 are arranged radially around the fixed arc contactor 3, and a fixed distance capable of maintaining insulation is provided between the inner end of the straightening vane 21 and the fixed arc contactor 3. To be The movable contactor 2 includes a movable arc contactor 6, a puffer cylinder 7, and a puffer piston 8.
A puffer chamber 9 for compressing the arc-extinguishing gas and an insulating nozzle 10 for spraying the compressed gas onto the arc 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas circuit breaker used in a power system, and more particularly to a puffer type gas circuit breaker for extinguishing an arc generated between contacts by extinguishing the gas.

[0002]

2. Description of the Related Art A puffer type gas circuit breaker is provided with a fixed contact and a movable contact which can be brought into and out of contact with a container filled with an arc extinguishing gas, and includes a puffer cylinder and a puffer piston provided on the movable contact side. Is a gas circuit breaker having an arc extinguishing chamber for extinguishing an arc by compressing the puffer chamber. That is, the arc extinguishing chamber of the puffer type gas circuit breaker is an insulating nozzle part fixed integrally with the puffer cylinder by compressing the arc extinguishing gas by compressing the puffer chamber in conjunction with the operation of the movable contact. It is configured so as to extinguish the arc by blowing it to the arc generated between the fixed contact and the movable contact.

6A and 6B are views showing an arc extinguishing chamber of a conventional puffer type gas circuit breaker, wherein FIG. 6A is a sectional view in the axial direction, and FIG. 6B is a sectional view in a direction orthogonal to the axis of the fixed contact portion. is there. This Figure 6
As shown in (A) of FIG.
It is filled with an arc-extinguishing gas such as F ₆ gas, and the fixed contact portion 1 and the movable contact portion 2 are arranged to face each other. Among them, the fixed contactor portion 1 includes a fixed arc contactor 3, a fixed side support portion 4, and a fixed energization contactor 5. Also,
The movable contactor 2 includes a movable arc contactor 6, a puffer cylinder 7, a puffer piston 8, a puffer chamber 9, an insulating nozzle 10, a movable energizing contactor 11, and a movable side support part 12.
It has. The details of each of the contactor portions 1 and 2 having such members will be described below.

First, as shown in FIGS. 6A and 6B, in the fixed contact portion 1, a cylindrical fixed side support portion 4 is provided so as to cover the periphery of the rod-shaped fixed arc contact 3. Are arranged coaxially and support the fixed arc contactor 3, and the fixed side support portion 4 is fixed to a container (not shown). The fixed energizing contact 5 is arranged at the tip of the fixed-side support portion 4 and is supported by the fixed-side support portion 4.

On the other hand, as shown in FIG. 6 (A), in the movable contact section 2, a cylindrical movable arc contact 6 is arranged coaxially with the fixed arc contact 3 so as to face each other. By moving the movable arc contactor 6 in the axial direction, the fixed / movable arc contactors 3, 6 are brought into contact with and separated from each other. A puffer cylinder 7 and a puffer piston 8 are coaxially arranged around the movable arc contact 6, and a puffer chamber 9 is formed by these members. An insulating nozzle 10 is coaxially arranged at the tip of the puffer cylinder 7 so as to project in front of the movable arc contactor 6, and is fixed to the puffer cylinder 7. A gas flow path for guiding the gas in the puffer chamber 9 between the fixed and movable arc contacts 3 and 6 is formed inside the insulating nozzle 10. Further, a movable energizing contact 11 is coaxially arranged around the insulating nozzle 10 at the tip of the puffer cylinder 7 so as to move in and out of contact with the stationary energizing contact 5.

Around the puffer cylinder 7, a cylindrical movable side support portion 12 is coaxially arranged, and is fixed to a container (not shown) together with the puffer piston 8 and at the same time fixed by an insulating member 13. It is fixed to the side support portion 4 with each other. The movable-side support portion 12 and the puffer piston 8 movably support the other members of the movable contact portion 6. That is, the movable arc contact 6, the puffer cylinder 7, the insulating nozzle 10, and the movable energization contact 11 are integrally fixed, so that the movable arc support 6, the puffer piston 8, and the movable side support portion 12 operate integrally. Is configured.

In the puffer type gas circuit breaker of FIG. 6 having the above-mentioned structure, the current interruption operation is performed as follows. That is, in the current interruption operation, as shown in FIG.
(A), the movable arc contact 6, the puffer cylinder 7, the insulating nozzle 10, and the movable energizing contact 11 of the movable contact unit 1 move in a direction away from the fixed contact unit 2. As a result, the movable energizing contact 11 is first separated from the fixed energizing contact 5, and subsequently the moving arc contact 6
Is separated from the fixed arc contactor 3, and an arc 14 is generated between the fixed and movable arc contactors 3 and 6. In this case, the puffer chamber 9 formed between the puffer cylinder 7 and the puffer piston 8 is compressed as the puffer cylinder 7 moves, so that the arc-extinguishing gas in the puffer chamber 9 is compressed and the insulating nozzle is insulated. It is guided to the 10th part, and this gas is blown to the arc 14 to extinguish it. The blown gas becomes a high-temperature hot gas flow 15 due to the energy of the arc 14, and most of it is guided from the tip portion of the fixed arc contactor 3 into the cylindrical fixed side support portion 4 that supports it.
Further, the gas is exhausted to the space inside the container outside the arc extinguishing chamber through the space inside the fixed side support portion 4.

[0008]

However, the conventional puffer type gas circuit breaker as shown in FIG. 6 has the following problems. That is, as described above, at the time of the current interruption operation, the hot gas flow 15 heated by the arc 14 is guided from the tip portion of the fixed arc contactor 3 into the fixed side support portion 4. In 4, the cross-sectional area of the gas flow channel is rapidly expanded. Due to such a rapid change in the cross-sectional area, the hot gas flow 15 flows at high speed in the vicinity of the fixed arc contactor 3 in the space inside the fixed side support portion 4, while the fixed arc contactor in the space inside the fixed side support portion 4 is generated. Three
The flow velocity of the hot gas flow 15 decreases on the outer peripheral side away from.
Therefore, on the outer peripheral side of the space in the fixed side support portion 4,
As shown in FIG. 6B, the flow of the hot gas flow 15 is disturbed due to rotation of the hot gas flow 15 and the stagnation easily occurs. As a result, the cooling of hot gas in the arc-extinguishing chamber is delayed,
The insulation performance between the fixed / movable arc contacts 3 and 6 is reduced. Further, from this, as the gas is exhausted to the outside from the fixed side support portion 4 in a high temperature state, the gas is discharged between the container covering the circumference of the arc extinguishing chamber or the arc extinguishing chamber of another phase in the same container. There is a risk of arcing and short circuit.

The present invention has been proposed in order to solve the above problems of the prior art, and its purpose is to:
Exhaust efficiency and cooling efficiency of hot gas generated by arc are high, sufficient insulation performance between contacts is secured, and
(EN) An excellent puffer-type gas circuit breaker capable of sufficiently ensuring insulation performance between a container and an arc extinguishing chamber of another phase.

More specifically, an object of the present invention is to improve the exhaust efficiency and cooling efficiency of the hot gas generated by the arc by rectifying the hot gas flow flowing in the outer peripheral portion of the fixed contact. That is. An object of the invention according to claim 2 is to further improve the cooling efficiency. It is an object of the present invention according to claim 3 to prevent the arc from moving to the rectifying plate and bring the rectifying plate closer to the movable contactor to further improve the exhaust efficiency and cooling efficiency. Claim 4
An object of the described invention is to improve the cooling efficiency of the hot gas flowing in this portion by rectifying the flow of the hot gas flowing in the vicinity of the fixed contact. It is an object of the invention according to claim 5 to further improve the cooling efficiency by increasing the surface area of the baffle plate that is in contact with the hot gas flow.

[0011]

A puffer type gas circuit breaker according to the present invention is provided with a fixed contact and a movable contact which can be contacted and separated from each other in a container filled with an arc-extinguishing gas. It has an arc extinguishing chamber for extinguishing the arc generated between the contacts by blowing it. In this case, a puffer chamber including a puffer cylinder and a puffer piston is provided on the movable contact side, and the puffer chamber is integrally fixed to the puffer cylinder. That is, when the current is cut off, the arc-extinguishing gas is compressed by compressing the puffer chamber and guided to the insulating nozzle, and the arc generated between the fixed contact and the movable contact is blown to extinguish the arc. To be done.

The puffer-type gas circuit breaker of the present invention is characterized in that, in addition to the basic structure as described above, a rectifying plate is provided on the outer peripheral portion of the fixed contact. That is, in the invention according to claim 1, a plurality of straightening vanes extending in the axial direction of the fixed contact are radially arranged around the fixed contact on the outer peripheral portion of the fixed contact, and the plurality of straightening vanes are arranged. It is characterized in that a fixed distance is provided between the fixed contact and the fixed contact.

The invention described in claims 2 to 5 is characterized in that, in the invention described in claim 1, the current plate is further configured as follows. That is, in the invention of claim 2, the current plate is made of metal. Further, in the invention according to claim 3, the metal straightening plate has a heat-resistant insulating cover that covers a surface of a portion facing the movable contact side. Further, in the invention according to claim 4, the portion of the current plate opposite to the movable contactor projects to a position close to the fixed contactor or is connected to the fixed contactor. Further, in the invention according to claim 5, the radial direction cross section of the current plate is corrugated,
It has a triangular shape or an uneven shape.

[0014]

In the present invention having the above structure,
The following effects are obtained. That is, according to the first aspect of the invention, when an arc is generated between the fixed and movable contacts during the current interruption operation, and the hot gas is generated by the arc, the hot gas flowing to the outer peripheral portion of the fixed contact is generated. The flow can be rectified by the rectifying plate provided in this portion, and turbulence due to rotation of the hot gas flow can be suppressed. As a result, since this hot gas flow can be made to flow in the axial direction with little turbulence, the hot gas in the arc extinguishing chamber can be efficiently exhausted. Further, the hot gas can be efficiently cooled by the straightening plate in the exhaust process.

According to the second aspect of the invention, since the current plate is made of metal, the cooling efficiency of the hot gas can be improved.
Further, according to the invention of claim 3, since the heat-resistant insulating cover is provided on the portion of the rectifying plate on the side of the movable contact, the arc generated between the fixed and the movable contact is generated in the axial direction of the fixed contact. Even if it extends along the arc, the arc does not transfer to the metal straightening plate. Further, according to the invention of claim 4, since the portion of the rectifying plate on the side opposite to the movable contact is brought close to the fixed contact, the hot gas flow flowing in the vicinity of the fixed contact is also efficiently cooled. be able to. Further, according to the invention of claim 5, since the radial section of the straightening vane is corrugated, triangular, or uneven, the surface area of the straightening vane in contact with the hot gas flow can be increased. As a result, the cooling efficiency of the hot gas can be improved.

[0016]

Embodiments of the puffer type gas circuit breaker according to the present invention will be specifically described below with reference to FIGS. [1] First Embodiment ... FIGS. 1 and 2 FIGS. 1 and 2 are views showing an arc extinguishing chamber of a first embodiment of a puffer type gas circuit breaker according to the present invention. FIG. FIG. 2 shows the input states. 1A and 2 are axial sectional views, and FIG. 1B is a sectional view orthogonal to the axis of the fixed contact portion. First, as shown in FIG. 1A, in a container not shown,
It is filled with an arc extinguishing gas such as SF ₆ gas, and the fixed contact portion 1 and the movable contact portion 2 are arranged to face each other. Among them, the fixed contactor portion 1 includes a fixed arc contactor 3, a fixed side support portion 4, a fixed energization contactor 5, and a rectifying plate 21.

That is, as shown in FIGS. 1A and 1B, in the fixed contact portion 1, a cylindrical fixed side support portion 4 is provided so as to cover the periphery of the rod-shaped fixed arc contact 3.
Are arranged coaxially and support the fixed arc contactor 3, and the fixed side support portion 4 is fixed to a container (not shown). The fixed energizing contact 5 is arranged at the tip of the fixed-side support portion 4 and is supported by the fixed-side support portion 4. Although these configurations are the same as those of the conventional example of FIG. 6 described above, further, in the present embodiment, the fixed arc contactor 3 is provided inside the fixed side support portion 4 in the outer peripheral portion of the fixed arc contactor 3. A plurality of metal straightening plates 21 extending in the axial direction are fixed. As shown in FIG. 1B, the plurality of straightening vanes 21 are arranged radially around the fixed arc contactor 3 and the straightening vanes 2 are arranged in a radial pattern.
There is a certain distance between the inner end of 1 and the fixed arc contactor 3 that is sufficient to maintain insulation. That is, in the present embodiment, the fixed arc contactor 3 corresponds to the fixed contactor of the present invention. The structure of the movable contactor portion 2 of the present embodiment is exactly the same as that of the conventional example shown in FIG.

In the puffer type gas circuit breaker of the present embodiment having the above-mentioned structure, the current interruption operation is performed as follows. That is, when the current is cut off from the closed state as shown in FIG. 2, as shown in FIG. 1A, the movable arc contactor 6, the puffer cylinder 7, and the insulating nozzle 10 of the movable contactor unit 1. , And the movable energizing contactor 11 move in a direction away from the fixed contactor portion 2. As a result, first, the movable energizing contact 11 is replaced by the fixed energizing contact 5.
After that, the movable arc contact 6 is separated from the fixed arc contact 3, and an arc 14 is generated between the fixed and movable arc contacts 3 and 6. In this case, the puffer chamber 9 formed between the puffer cylinder 7 and the puffer piston 8 is compressed as the puffer cylinder 7 moves, so that the arc-extinguishing gas in the puffer chamber 9 is compressed and the insulating nozzle is insulated. It is guided to the 10th part, and this gas is blown to the arc 14 to extinguish it.

The gas blown to the arc 14 becomes a hot gas flow 15 of high temperature by the energy of the arc 14,
Most of them are guided from the tip portion of the fixed arc contactor 3 into the cylindrical fixed side support portion 4 that supports the fixed arc contactor 3. in this case,
Since the cross-sectional area of the gas flow path rapidly expands in the fixed side support part 4, the hot gas flow 15 flows at high speed near the fixed arc contactor 3 in the space in the fixed side support part 4, The flow velocity of the hot gas flow 15 decreases on the outer peripheral side of the space inside the side support portion 4 away from the fixed arc contactor 3. Therefore, as described above, conventionally, on the outer peripheral side of the space in the fixed side support portion 4, the flow of the hot gas flow 15 is disturbed due to rotation or the like, which causes a problem that stagnation easily occurs. There is.

On the other hand, in this embodiment, as shown in FIG.
(B), a plurality of straightening vanes 21 are radially arranged around the fixed arc contactor 3 as a central axis on the outer peripheral side of the space inside the fixed side support portion 4, so that the plurality of straightening vanes are arranged. The plate 21 can rectify the hot gas flow 15 in this part,
Turbulence due to rotation of the hot gas flow 15 can be suppressed.
As a result, the hot gas flow 15 can flow in the axial direction with little turbulence, so that the hot gas in the arc extinguishing chamber can be efficiently exhausted to the space inside the container outside the arc extinguishing chamber. Further, the hot gas can be efficiently cooled by the flow straightening plate 21 in the exhaust process. In particular, in this embodiment, since the current plate 21 is made of metal, the hot gas cooling efficiency can be further improved.

As described above, according to this embodiment,
On the outer peripheral side of the space in the fixed side support portion 4, a plurality of rectifying plates 21 arranged radially around the fixed arc contactor 3 as a central axis rectifies the hot gas flow flowing through the outer peripheral portion of the fixed arc contactor 3, The exhaust efficiency and cooling efficiency of the hot gas generated by the arc 14 can be improved. Therefore, the insulation performance between the fixed / movable arc contacts 3 and 6 can be sufficiently ensured, and the insulation performance between the container and the arc extinguishing chamber of another phase can be sufficiently ensured. It is possible to prevent arcing and short circuit. [2] Second embodiment ... Fig. 3 Fig. 3 is a view showing a shut-off operation state of an arc-extinguishing chamber of a second embodiment of the puffer type gas circuit breaker according to the present invention. (B) is a cross-sectional view in a direction orthogonal to the axis of the fixed contact portion. As shown in FIGS. 3A and 3B,
The plurality of metal straightening plates 21 of this embodiment are provided with a heat-resistant insulating cover 22 that covers the surface of the end portion of the movable contact portion 2 side. The rest of the configuration is exactly the same as that of the first embodiment.

In the puffer type gas circuit breaker of the present embodiment having the above-mentioned structure, in addition to the rectifying action similar to that of the first embodiment being obtained by the rectifying plate 21,
Furthermore, the following effects are obtained. That is, the fixed arc contactor 3 and the movable arc contactor 6 during the current interruption operation.
The arc 14 ignited between and may extend long along the axial direction of the fixed arc contactor 3 due to the blown gas. In this case, if the metal straightening plate 21 is arranged in the vicinity of the movable contactor portion 2, the arc 14 may be transferred to the metal straightening plate 21. However, according to the present embodiment, the heat-resistant insulating cover 2 is attached to the end of the metal straightening plate 21 on the movable contact portion 2 side.
Since the metal straightening plate 2 is provided, even when the metal straightening plate 21 is arranged in the vicinity of the movable contactor portion 2, the metal straightening plate 2 is provided.
It is possible to reliably prevent the arc 14 from shifting to 1.

As described above, according to this embodiment, the current plate 21 made of metal can be arranged closer to the movable contactor 2 side than in the first embodiment. The exhaust efficiency and cooling efficiency of hot gas can be further improved. Therefore, as compared with the first embodiment, the insulation performance between the fixed / movable arc contacts 3 and 6 is further improved, and the insulation performance between the container and the arc extinguishing chamber of another phase is further improved. Therefore, it is possible to more effectively prevent arcing and short circuit of these portions. [3] Third Embodiment FIG. 4 FIG. 4 is a diagram showing a shut-off operation state of an arc-extinguishing chamber of a third embodiment of the puffer type gas circuit breaker according to the present invention, FIG. (B) is a cross-sectional view in a direction orthogonal to the axis of the fixed contact portion. As shown in FIGS. 4A and 4B,
The movable contact portion 2 of the plurality of metal straightening plates 21 of this embodiment.
A protruding portion 21a protruding toward the fixed arc contactor 3 side is provided at an end portion on the opposite side to the fixed arc contactor 3 and the protruding portion 21a is connected to the fixed arc contactor 3. The rest of the configuration is exactly the same as that of the first embodiment.

In the puffer type gas circuit breaker of the present embodiment having the above-mentioned structure, in addition to the fact that the rectifying plate 21 provides the same rectifying action as in the first embodiment,
Furthermore, the following effects are obtained. That is, at the end of the rectifying plate 21 on the downstream side of the gas flow on the side opposite to the movable contactor 2, the protruding portion 21a protruding toward the fixed arc contactor 3 side.
Since the protrusion 21a is provided, the hot gas flow 15 flowing near the fixed arc contactor 3 can be efficiently cooled by the protrusion 21a.

As described above, according to this embodiment, the hot gas flow 15 flowing on the outer peripheral side away from the fixed arc contactor 3 is not only efficiently cooled but fixed as compared with the first embodiment. The hot gas flow 15 flowing near the arc contactor 3 can also be efficiently cooled. Therefore, the cooling efficiency of the entire hot gas flow 15 flowing on the outer peripheral portion of the fixed arc contactor 3 can be improved. Therefore, as compared with the first embodiment, the insulation performance between the fixed / movable arc contacts 3 and 6 is further improved, and the insulation performance between the container and the arc extinguishing chamber of another phase is further improved. Because you can
It is possible to more effectively prevent arcing and short circuit of these portions. [4] Fourth Embodiment FIG. 5 FIG. 5 is a view showing a shut-off operation state of an arc-extinguishing chamber of a fourth embodiment of the puffer type gas circuit breaker according to the present invention, FIG. (B) is a cross-sectional view in a direction orthogonal to the axis of the fixed contact portion. As shown in FIG. 5B, the radial cross-sections of the plurality of metal straightening plates 21 of this embodiment are corrugated. Regarding the other parts, the first
The configuration is exactly the same as that of the embodiment.

In the puffer type gas circuit breaker of the present embodiment having the above-mentioned structure, in addition to the fact that the rectifying plate 21 can obtain the same rectifying action as in the first embodiment,
Furthermore, the following effects are obtained. That is, since the rectifying plate 21 has a wave-shaped cross section in the radial direction, the rectifying plate 21 in contact with the hot gas flow 15 is different from the case where the rectifying plate 21 is formed in a flat plate shape as in the first embodiment. The surface area is large and the cooling efficiency is improved accordingly.

As described above, according to this embodiment, the cooling efficiency of the hot gas flow 15 can be further improved as compared with the first embodiment. Therefore, as compared with the first embodiment, the insulation performance between the fixed / movable arc contacts 3 and 6 is further improved, and the insulation performance between the container and the arc extinguishing chamber of another phase is further improved. Therefore, it is possible to more effectively prevent arcing and short circuit of these portions. [5] Other Embodiments The present invention is not limited to the above embodiments, and various other modified examples can be implemented. For example, it is possible to appropriately combine a plurality of the embodiments. Further, the specific shape, material, number, etc. of the current plate can be appropriately selected. Moreover, the specific configurations of the fixed contact portion and the movable contact portion can be appropriately selected. That is, the present invention is applicable to a puffer-type gas circuit breaker generally configured to blow gas from the puffer chamber provided on the movable contact side to the arc generated between the contacts, and similarly, has an excellent action. And the effect can be obtained.

[0028]

As described above, according to the present invention,
By providing a straightening plate on the outer periphery of the fixed contact, the exhaust efficiency and cooling efficiency of the hot gas generated by the arc are high, sufficient insulation performance between the contacts is ensured, and the arc of the container and other phases is extinguished. It is possible to provide an excellent puffer-type gas circuit breaker capable of sufficiently ensuring the insulation performance between the chamber and the chamber.

[Brief description of drawings]

1A and 1B are diagrams showing a shut-off operation state of an arc extinguishing chamber of a puffer type gas circuit breaker according to a first embodiment of the present invention, in which FIG. 1A is an axial sectional view, and FIG. FIG.

FIG. 2 is an axial cross-sectional view showing a closed state of the arc extinguishing chamber of FIG.

3A and 3B are diagrams showing a shut-off operation state of an arc-extinguishing chamber of a second embodiment of the puffer type gas circuit breaker according to the present invention, FIG. 3A being an axial sectional view and FIG. 3B being a shaft of a fixed contact portion. FIG.

4A and 4B are diagrams showing a shut-off operation state of an arc extinguishing chamber of a third embodiment of the puffer type gas circuit breaker according to the present invention, FIG. 4A being an axial sectional view, and FIG. FIG.

5A and 5B are diagrams showing a shutoff operation state of an arc extinguishing chamber of a fourth embodiment of the puffer type gas circuit breaker according to the present invention, FIG. 5A being an axial sectional view, and FIG. 5B being a shaft of a fixed contact portion. FIG.

FIG. 6 is a view showing a shutoff operation state of an arc extinguishing chamber of an example of a conventional puffer type gas circuit breaker, (A) being an axial sectional view,
FIG. 6B is a cross-sectional view in a direction orthogonal to the axis of the fixed contact portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fixed contact part 2 ... Movable contact part 3 ... Fixed arc contact 4 ... Fixed side support part 5 ... Fixed energizing contact 6 ... Movable arc contact 7 ... Puffer cylinder 8 ... Puffer piston 9 ... Puffer chamber 10 ... Insulation nozzle 11 ... Movable energizing contact 12 ... Movable side support part 13 ... Insulation member 14 ... Arc 15 ... Hot gas flow 21 ... Rectifier plate 21a ... Projection part 22 ... Insulation cover

Claims (5)

[Claims] 1. A puffer chamber comprising a puffer cylinder and a puffer piston provided on the side of the movable contact, which includes a fixed contact and a movable contact that can be contacted and separated from each other in a container filled with an arc-extinguishing gas. A puffer type having an arc extinguishing chamber that extinguishes arcs by compressing the arc extinguishing gas by means of an arc and guiding it to an insulating nozzle unit integrally fixed to the puffer cylinder, and blowing the arc generated between the fixed contact and the movable contact In the gas circuit breaker, a plurality of straightening vanes extending in the axial direction of the fixed contactor are radially arranged around the fixed contactor on the outer periphery of the fixed contactor, and the plurality of straightening vanes and the fixed contactor are arranged. A puffer-type gas circuit breaker characterized in that a constant distance is provided between the puffer type gas circuit breaker and the gas circuit breaker. 2. The puffer type gas circuit breaker according to claim 1, wherein the current plate is made of metal. 3. The puffer type gas circuit breaker according to claim 2, wherein the metal straightening plate has a heat-resistant insulating cover that covers a surface of a portion facing the movable contact side. 4. The puffer shape according to claim 1, wherein a portion of the current plate opposite to the movable contactor projects to a position near the fixed contactor or is connected to the fixed contactor. Gas circuit breaker. 5. The radial cross section of the straightening vane is corrugated, triangular, or uneven.
Puffer type gas circuit breaker described.