JP5238632B2 - Gas circuit breaker and gas insulated switchgear - Google Patents

Description

The present invention relates to a gas circuit breaker and a gas-insulated switchgear , and more particularly to a gas circuit breaker and a gas-insulated switchgear suitable for use in a case where a spring is used as a drive source and an insulating gas having high insulation arc-extinguishing properties is enclosed in a tank. About.

  A gas circuit breaker that is installed in a substation or switching station and uses a spring as a drive source is described in Patent Document 1, for example. And this gas circuit breaker has connected the operating device which used the spring as the drive source, and the interruption | blocking part by the link mechanism.

  Further, the gas circuit breaker described in Patent Document 1 has a horizontal tank in which an insulating gas is sealed, and an operation box is mounted below the tank. A spring serving as a drive source is accommodated in the operation box.

JP 2007-87836 A

  When the gas circuit breaker shown in Patent Document 1 is applied to a gas-insulated switchgear, the operating device is disposed under the breaker tank, so that the overall height of the gas circuit breaker cannot be reduced, and the gas-insulated switchgear can be reduced. This was a factor that hindered downsizing of the device.

  Further, as another problem, Patent Document 1 describes nothing about a gas seal at a connecting portion between a blocking portion installed in a blocking portion tank filled with an insulating gas at a predetermined pressure and a link mechanism outside the blocking portion tank. In general, however, an insulating rod connected to the movable contact of the blocking portion is connected to a link mechanism, and a gas seal is formed at a portion where the insulating rod penetrates the blocking portion tank in the moving direction of the movable contact. Is provided. However, since the insulating rod slides along the longitudinal direction of the gas-sealed through part of the shut-off part tank, the sliding range of the insulating rod with respect to the gas seal is widened and the sealing effect is reduced, and the inside of the shut-off part tank is reduced. There was a risk of leakage of insulating gas.

An object of the present invention is to provide a gas circuit breaker and a gas insulated switchgear that can efficiently reduce the leakage of insulating gas in the breaker tank as well as reduce the height dimension.

In order to achieve the above object , a gas circuit breaker according to the present invention includes a shut-off unit tank including a shut-off unit that is filled with an insulating gas and has a fixed contact and a movable contact, and the movable contact is a fixed contact. In a gas circuit breaker comprising an operation device using a closing spring and a breaker spring as a drive source for contact with and separating from each other, and a link mechanism unit that connects the operation device and the movable contact of the breaker unit , together with the operating device and the blocking portion tank and the link mechanism portion adjacent laterally installed, forming a gas seal chamber communicating with the cut-off portion tank between the blocking portion tank and operating device, the gas via a rotary shaft extending through the seal chamber to constitute the link mechanism portion, wherein the gas seal means is provided on the portion where the rotating shaft passes through the gas seal chamber, and said rotary shaft, constitute the gas seal chamber Gas through the partition wall A second lever for connecting to the operating unit is fixed to one side of a portion of the rotating shaft that extends to the outside of the gas seal chamber, and extends to the outside of the gas sealing chamber of the rotating shaft. A third lever for connecting to the shock absorber is fixed to the other side of the existing portion .
Further, the gas insulated switchgear of the present invention includes a horizontally arranged gas circuit breaker, a current transformer unit installed above and laterally of the gas circuit breaker, and a current transformer unit installed in the lateral direction. In a gas-insulated switchgear comprising a disconnector unit installed adjacent to a cable head, a cable head connected to the disconnector unit, and a main bus vessel connected to the current transformer unit installed above The gas circuit breaker is a gas circuit breaker configured as described above.

  According to the present invention, the height of the circuit breaker can be reduced by installing the breaker tank, the link mechanism, and the operation unit adjacent to each other in the lateral direction, and as a result, the overall height of the gas insulated switchgear is suppressed. And can be miniaturized. Further, by providing the gas seal means through the rotation shaft of the gas seal chamber, the rotation shaft can be gas-sealed at the same position. As a result, the sliding range with respect to the gas seal means is narrowed, so that the sealing effect is reduced. And the leakage of the insulating gas in the shutoff tank can be prevented.

The perspective view which shows 1st Embodiment of the gas circuit breaker by this invention. FIG. 2 is a partially longitudinal side view along line AA in FIG. 1 for explaining a state in which a gas circuit breaker is charged. The partial vertical side view along the BB line of FIG. 1 explaining the injection | throwing-in state of a gas circuit breaker. The expanded longitudinal cross-sectional view which follows the CC line of a gas circuit breaker. FIG. 2 is a view corresponding to FIG. 2 for explaining a cut-off state of the gas circuit breaker. FIG. 2 is a view corresponding to FIG. 2 for explaining a state in which the gas circuit breaker is turned on. The whole side view of the gas insulated switchgear which applied the gas circuit breaker by this invention. FIG. 2 is a view corresponding to FIG. 2 showing a second embodiment of the gas circuit breaker according to the present invention. FIG. 9 is a view corresponding to FIG. 8 for explaining a cut-off state of the gas circuit breaker shown in FIG. 8.

  Hereinafter, an embodiment of a gas circuit breaker used in a gas insulated switchgear according to the present invention will be described with reference to FIGS.

  As shown in FIG. 7, the gas insulated switchgear 1 includes a horizontally disposed gas circuit breaker 2, current transformer units 3 </ b> A and 3 </ b> B disposed above and laterally of the gas circuit breaker 2, and laterally installed. The disconnector unit 4 installed adjacent to the current transformer unit 3B, the cable head 5 connected to the disconnector unit 4, and the main bus connected to the current transformer unit 3A installed above It has containers 6A, 6B and the like. The gas insulated switchgear 1 is arranged such that these components cross in a plane in order to make the height dimension as low as possible.

As shown in FIG. 1 , the gas circuit breaker 2 applied to the gas insulated switchgear 1 configured as described above includes a blocking section tank 7, a link mechanism section 8, and an operating device 9. The tank 7 is a cylindrical container and is supported by the gantry 10.

  Next, the details of the gas circuit breaker 2 will be described with reference to FIGS.

An insulating gas, for example, sulfur hexafluoride gas, is enclosed in the shut-off tank 7 at a specified pressure. Electric power is supplied from a high-voltage power source in the substation to a shut-off portion composed of the fixed contact 11 and the movable contact 12 via a bushing and a conductor (not shown). FIG. 2 shows a state in which the movable contact 12 is in contact with the fixed contact 11, in other words, a state in which the contact of the blocking portion is turned on.

In such a state , when an abnormal current flows through the system due to a lightning strike or the like, a cutoff command is input to the gas circuit breaker 2 and the movable contact 12 is separated from the fixed contact 11 to cut off the current. The movable contact 12 is connected to the insulating rod 13 at the end opposite to the side in contact with the fixed contact 11.

The link mechanism portion 8 is on the extended end side of the insulating rod 13, and is installed adjacent to the blocking portion tank 7 on the anti-fixed contact side of the movable contact 12. As shown in FIG. 4, the link mechanism portion 8 is formed with a gas seal chamber 18 surrounded by a pair of partition walls 14A, 14B, an upper plate 15, a lower plate 16, and an end plate 17. The gas seal chamber 18 communicates with the blocking tank 7 and is filled with insulating gas at a specified pressure. The gas seal chamber 18 is provided with a first rotating shaft 20 that passes through the partition walls 14A and 14B and is rotatably supported by bearings 19A and 19B. In the partition wall penetrating portion of the first rotary shaft 20, the gas seal chamber is located closer to the gas seal chamber than the bearings 19 </ b> A and 19 </ b> B. Rings 21A and 21B are provided, respectively.

  Further, in the gas seal chamber 18, a first lever 22 is located at one end fixed to the first rotating shaft 20 and the other end connected to the end of the insulating rod 13. One end of the first rotating shaft 20 penetrating outward from the partition walls 14A and 14B is fixed to the second lever 23, and one end of the third lever 24 is fixed to the other side. One end of a link 25 is rotatably connected to the other end of the third lever 24, and the other end of the link 25 is connected to a piston rod 27 of the shock absorber 26. The piston 28 at the tip of the piston rod 27 is configured to slide on the cylinder 29. An incompressible fluid such as oil is sealed in the cylinder 29 of the shock absorber 26.

  On the other hand, as shown in FIG. 2, one end of the output link 30 is connected to the other end of the second lever 23, and the other end is connected to one end of the fifth lever 31 of the operation device 9.

  Next, the configuration of the operation device 9 will be described. The operation device 9 is fixed to the end plate 17 of the link mechanism unit 8 by a fixed plate 32. A cylindrical shut-off spring case 34 and a cylindrical closing spring case 35 are arranged in the longitudinal direction of the shut-off portion tank 7 with respect to the housing 33 supported by the fixed plate 32, in other words, the movable contactor. It arrange | positions adjacent to the direction along 12 operation | movement directions, and is installed so that the operation | movement direction of a spring may turn into the same direction. In FIG. 2, the cutoff spring 36 and the closing spring 37 housed in the blocking spring case 34 and the closing spring case 35 are both in a compressed state.

  One end of the cutoff spring 36 is supported by the housing 33, and the other end is supported by a spring receiver 38. One end of a cutoff spring link 39 is connected to the spring receiver 38. The other end of the blocking spring link 39 is connected to one end of the fourth lever 40. An intermediate portion of the fourth lever 40 is fixed to a second rotating shaft 41 that is pivotally supported by the housing 33, and one end of the fifth lever 31 is fixed coaxially. The other end of the output link 30 is connected to the other end of the fifth lever 31.

  The closing spring 37 has one end supported by the housing 33 and the other end supported by a spring receiver 42. One end of a closing spring link 43 is connected to the spring receiver 42. The other end of the closing spring link 43 is connected to a closing cam 45 fixed to a third rotating shaft 44 that is pivotally supported by the housing 33.

  Although not shown in the figure, the operating device 9 is equipped with a gear train, an electric motor, an auxiliary switch, an on / off indicator for a breaker contact point, etc., to compress the closing spring 37 after being released.

  Next, operation | movement of the gas circuit breaker 2 is demonstrated using FIGS.

  First, the operation for shifting from the closing state contact state shown in FIG. 2 to the closing state will be described. In FIG. 2, when a cutoff command is input to the gas circuit breaker 2, the gas circuit breaker 2 starts a cutoff operation. In other words, a control mechanism (not shown) is operated to release the restriction of the cutoff spring 36 in the compressed state and release the cutoff spring 36. Due to the release of the cutoff spring 36, the fourth lever 40 rotates counterclockwise via the cutoff spring link 39. Then, the fifth lever 31 is rotated counterclockwise via the second rotation shaft 41. As a result, the output link 30 moves in the horizontal right direction. Then, the second lever 23 of the link mechanism unit 8 rotates counterclockwise. As a result, the first rotating shaft 20 is also rotated counterclockwise, and the first lever 22 fixed thereto is also rotated counterclockwise. Similarly, the third lever 24 fitted to the rotary shaft 20 also rotates in the same direction. In FIG. 3, since the viewpoint is opposite to that in FIG. 2, the third lever 24 rotates clockwise. The third lever 24 moves the link 25 downward, and accordingly, the piston rod 27 also moves downward. As a result, the piston 28 compresses the oil in the cylinder 29 to generate a buffering force.

  On the other hand, with the rotation of the first lever 22, the insulating rod 13 is driven leftward in FIG. 2 (rightward in FIG. 3), and the movable contact 12 of the breaking portion contact is moved horizontally and fixed. The contact 11 is separated.

  When the shut-off spring 36 is fully released, the contact shut-off operation ends, and the other end of the fourth lever 40 comes into contact with the outer peripheral surface of the closing cam 45 and stops as shown in FIG.

  Next, an operation for shifting from the shut-off state of the shut-off portion contact shown in FIG. 5 to the closing state shown in FIG. 6 will be described below.

  In the shut-off state shown in FIG. 5, when a closing command is input to the gas circuit breaker 2, a control mechanism (not shown) operates to release the restriction of the closing spring 37 in the compressed state and release the closing spring 37. To force. As a result, the closing cam 45 and the third rotating shaft 44 rotate counterclockwise via the closing spring link 43. As the cam 45 rotates, the outer peripheral surface of the cam 45 presses the fourth lever 40 and rotates the fourth lever 40 clockwise. As a result, the cutoff spring 36 is compressed via the cutoff spring link 39 and the cutoff spring receiver 38.

  At the same time, as the fourth lever 40 rotates, the output link 30 moves in the horizontal left direction in FIG. As a result, the second lever 23 and the first rotating shaft 20 of the link mechanism unit 8 are rotated clockwise. As the first rotary shaft 20 rotates, the first lever 22 rotates clockwise and moves the insulating rod 13 to the right. As a result, the movable contact 12 connected to the insulating operation rod 13 moves in the horizontal right direction to contact the fixed contact 11 and the breaking portion contact is turned on. When all the closing springs 37 are released, the closing operation shown in FIG. 6 is completed.

  Thereafter, the closing spring 37 released by an electric motor and a gear train (not shown) is compressed to return to the closing state of the breaking portion contact shown in FIG. 2, and both the closing spring 37 and the breaking spring 36 are held in a compressed state.

  Incidentally, even in the closing operation, a buffering force is generated by the buffer device 26 provided adjacent to the link mechanism unit 8. That is, as the first rotating shaft 20 is rotated, the third lever 24 is also rotated, and the piston 28 of the shock absorber 26 moves through the cylinder 29 via the link 25 and the piston rod 27 so that the oil It receives resistance and generates a buffering force.

  According to the present embodiment, the operating device 9 that uses a spring as a drive source is positioned adjacent to the lateral direction of the link mechanism portion 8, and the link mechanism portion 8 is adjacent to the lateral direction of the blocking portion tank 7. The operation unit 9 is arranged below the blocking unit tank 7 because it is arranged in a straight line in the longitudinal direction of the blocking unit tank 7, in other words, the advancing / retreating direction (operation direction) in which the movable contact 12 advances and retreats. The height of the gantry 10 can be reduced as compared with the conventional gas circuit breaker. As a result, since the overall height of the gas circuit breaker 2 can be reduced, the gas insulated switchgear 1 to which the gas circuit breaker 2 is applied can be downsized.

  In addition, since the shock absorber 26 is provided adjacent to the lower side of the link mechanism portion 8 located between the operation device 9 and the cutoff portion tank 7, the movable contact 12 and the shock absorber 26 approach each other. The braking efficiency of the movable contact 12 is improved, and the reliability of the gas circuit breaker 2 can be improved.

  Furthermore, the output link 30 that connects the operation device 9 and the link mechanism unit 8 and the third lever 24 that is connected to the shock absorber 26 connect the link 25 to the housing 33 of the operation device 9 and the partition wall 14A of the link mechanism unit 8. , 14B, so-called outside arrangement, these members can be directly subjected to maintenance inspection work by visual observation, facilitating the work, and improving the reliability of maintenance inspection. In addition, when the operation device 9 is disconnected from the gas circuit breaker 2 at the time of maintenance and inspection, the connection between the output link 30 and the fifth lever 31 is released and the end plate 17 of the link mechanism unit 8 is provided by the above-described outer arrangement. And the fixing plate 32 of the operating device 9 can be unfastened, so that maintenance and inspection work can be easily performed.

  In addition, since the movable member that penetrates the gas seal chamber 18 is the first rotating shaft 20 in the above embodiment, the following effects can be obtained. That is, since the first rotary shaft 20 penetrates the partition walls 14A and 14B of the gas seal chamber 18 and is supported by the bearings 19A and 19B at the penetrating portions, the first rotary shaft 20 is inside and outside the partition walls 14A and 14B. It does not move along the axial direction, but rotates at the same position. As a result, since the longitudinal direction of the first rotating shaft 20 does not tilt during rotation with respect to the partition walls 14A and 14B passing therethrough, the first rotating shaft 20 and the partition wall 14A are in the vicinity of the bearings 19A and 19B. , 14B and the O-rings 21A, 21B in contact with both of them, the insulating gas sealed in the shut-off portion tank 7 with a specified pressure is supplied to the partition walls 14A, 14B of the gas seal chamber 18 and the first rotating shaft. Leakage from between 20 can be easily prevented. As a result, it is possible to prevent a reduction in the breaking performance of the gas circuit breaker 2.

  Furthermore, by forming the length of the second lever 23 to be shorter than the length of the first lever 22, the displacement distance of the output link 30 can be reduced compared to the displacement distance of the insulating rod 13. Thus, the horizontal dimension of the link mechanism unit 8 and the operation unit 9 can be reduced.

  In the above embodiment, the output link 30 connected to the second lever 23 is disposed outside the partition wall 14B, but may be disposed outside the partition wall 14A.

  Next, a second embodiment of the gas circuit breaker according to the present invention will be described with reference to FIGS. The same reference numerals as those in FIGS. 1 to 7 indicate the same components, and thus detailed description thereof is omitted.

  FIG. 8 shows a state in which the contact of the interrupting part is in the on state, and both of the interrupting spring 36 and the closing spring 37 are in the compressed state, and FIG.

  The link mechanism unit 8 and the operation device 9 are disposed adjacent to each other, and the number of these constituent members is the same as that of the gas circuit breaker 2 in the first embodiment. In the second embodiment, a configuration different from the first embodiment is an installation position of the cutoff spring 36 of the operating device 9. That is, like the first embodiment, the closing spring 37 extends upward from the housing 33 of the operating device 9 and is installed so that the operating direction of the spring is the vertical direction. Is installed in the lower part of the link mechanism part 8 toward the shut-off part tank 7 side, and is arranged so that the operation direction is a lateral direction perpendicular to the operation direction of the closing spring 37. Further, the closing spring case 35 is disposed so as to be in contact with or close to the fixed plate 32 of the operating device 9. In addition, the closing spring case 35 may be installed in the lower part of the said interruption | blocking part tank 7 in relation with the installation apparatus of periphery.

  According to the second embodiment, by using the space below the link mechanism portion 8 or the space below the blocking portion tank 7, as shown in FIGS. 8 and 9, in the first embodiment. The lateral dimension of the operating device 9 having the size indicated by the two-dot chain line can be shortened, and not only the height dimension of the gas circuit breaker 2 can be reduced, but also the longitudinal dimension can be reduced.

  Further, the distance from the gantry 10 to the cutoff spring 36 and the closing spring 37 of the drive source, in other words, the length of the output link 30 is at least as much as the diameter of the cutoff spring case 34 compared to the first embodiment. Since it can be shortened, it becomes possible to reduce the operation vibration of the gas circuit breaker 2 by the cutoff spring 36 and the closing spring 37.

  Furthermore, since the output link 30 can be shortened, the driving efficiency of the movable contact 12 can be improved, so that the gas circuit breaker 2 and the gas insulated switchgear in which the gas circuit breaker 2 is installed can be further downsized. .

  By the way, in the present embodiment, the height of the gantry 10 of the blocking tank 7 is the same as that of the first embodiment as long as the outer diameter of the blocking spring case 34 is within the protruding dimension of the shock absorber 26. It is. However, when the outer diameter of the shut-off spring case 34 exceeds the downward projecting dimension of the shock absorber 26, the height of the gantry 10 may be increased so that the outer diameter of the shut-off spring case 34 is slightly exceeded. The height dimension of the gantry 10 of the vessel 2 is not made extremely high as compared with the first embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Gas insulation switchgear, 2 ... Gas circuit breaker, 7 ... Shutter tank, 8 ... Link mechanism part, 9 ... Operation device, 10 ... Mounting stand, 11 ... Fixed contact, 12 ... Movable contact, 13 ... Insulating rod 14A, 14B ... partition wall, 15 ... upper plate, 16 ... lower plate, 17 ... end plate, 18 ... gas seal chamber, 19A, 19B ... bearing, 20 ... first rotating shaft, 21A, 21B ... O-ring.

Claims (14)

A shut-off tank with a built-in shut-off portion filled with an insulating gas and having a fixed contact and a movable contact, and a closing spring and a shut-off spring for bringing the movable contact into and out of contact with the fixed contact In a gas circuit breaker comprising an operating device as a drive source and a link mechanism unit that connects the operating device and the movable contact of the blocking unit,
The shut-off portion tank, the link mechanism portion, and the operating device are installed adjacent to each other in a lateral direction, and a gas seal chamber that communicates with the shut-off portion tank is formed between the shut-off portion tank and the operating device, and the gas seal The link mechanism is configured via a rotating shaft that passes through the chamber, gas sealing means is provided in a portion of the gas seal chamber through which the rotating shaft passes , and the rotating shaft forms the gas seal chamber A second lever for connecting to the operating unit is fixed to one side of a portion of the rotating shaft that extends outside the gas seal chamber through the partition wall and extends to the outside of the gas seal chamber, The gas circuit breaker characterized by fixing the 3rd lever for connecting with a buffering device to the other side of the part extended outside the gas seal chamber . A shut-off tank with a built-in shut-off portion filled with an insulating gas and having a fixed contact and a movable contact, and a closing spring and a shut-off spring for bringing the movable contact into and out of contact with the fixed contact In a gas circuit breaker comprising an operating device as a drive source and a link mechanism unit that connects the operating device and the movable contact of the blocking unit,
The link mechanism part is installed laterally adjacent to the blocking unit tank, the operation unit is installed adjacent to the link mechanism unit laterally, and the link mechanism unit communicates with the blocking unit tank. Forming a gas seal chamber, configuring the link mechanism portion via a rotating shaft penetrating the gas seal chamber, providing a gas seal means in a portion of the gas seal chamber through which the rotating shaft passes , and The rotating shaft extends through the partition wall constituting the gas seal chamber and extends outside the gas seal chamber, and is connected to the operating device on one side of a portion of the rotating shaft that extends outside the gas seal chamber. A gas circuit breaker characterized in that a second lever is fixed, and a third lever for connecting to a shock absorber is fixed to the other side of the portion of the rotating shaft extending outside the gas seal chamber . 3. The gas circuit breaker according to claim 1, wherein the blocking section tank, the link mechanism section, and the operation device are arranged along a straight line in a horizontal direction. 3. The gas circuit breaker according to claim 1, wherein the blocking section tank, the link mechanism section, and the operation device are arranged along the advancing / retreating direction of the movable contact. The rotating shaft is a gas circuit breaker according to any one of claims 1 to 4, characterized in that securing the first lever for driving the movable contactor inside the gas seal chamber. The rotating shaft is rotatably supported by a partition that constitutes the gas seal chamber via a bearing, and the gas seal means is in contact with both the partition and the rotating shaft on the gas seal chamber side of the bearing. gas circuit breaker according to any one of claims 1 to 5, characterized in that provided The operating device includes a fourth lever that transmits the driving force of the cutoff spring, a second rotating shaft that fixes the fourth lever, and a fifth lever that is fixed on the second rotating shaft. The gas circuit breaker according to any one of claims 1 to 6, wherein the fifth lever is connected to a second lever of the link mechanism portion. The gas circuit breaker according to claim 7 , wherein the fifth lever is disposed outside a housing of the operation device. The gas circuit breaker according to any one of claims 1 to 8, wherein the operating directions of the shut-off spring and the closing spring are the same. The gas circuit breaker according to any one of claims 1 to 8, wherein the operating directions of the shut-off spring and the closing spring are perpendicular to each other. 11. The gas circuit breaker according to claim 10 , wherein either one of the shut-off spring and the closing spring is installed below the link mechanism portion. A shut-off tank with a built-in shut-off portion filled with an insulating gas and having a fixed contact and a movable contact, and a closing spring and a shut-off spring for bringing the movable contact into and out of contact with the fixed contact In a gas circuit breaker comprising an operating device as a drive source and a link mechanism unit that connects the operating device and the movable contact of the blocking unit,
The link mechanism part is installed laterally adjacent to the movable contact of the blocking part tank on the side opposite to the fixed contact, the controller is installed adjacent to the link mechanism part, and the blocking A gas seal chamber that communicates with the shut-off tank is formed between the tank and the operation unit, and the link mechanism is configured via a rotating shaft that passes through the gas seal chamber, and the rotation of the gas seal chamber Gas sealing means is provided in a portion through which the shaft passes, and the rotating shaft extends outside the gas sealing chamber through the partition wall constituting the gas sealing chamber, and extends outside the gas sealing chamber of the rotating shaft. A second lever for connecting to the operating device is fixed to one side of the part, and a third lever for connecting to the shock absorber on the other side of the part extending outside the gas seal chamber of the rotating shaft were fixed, moreover, shielding of the operating device Springs, gas circuit breaker, characterized in that the operating direction at the bottom is installed such that the operation in the same direction as the direction of the movable contact of the lower or the blocking portion tank of the gas seal chamber of the linkage mechanism. A shut-off part tank containing a shut-off part containing an insulating gas and having a stationary contact and a movable contact, and a spring for bringing the movable contact into and out of contact with the stationary contact are used as a drive source. An operating device, a link mechanism that connects the operating device and the movable contact of the blocking unit, and a shock absorber that is provided adjacent to the link mechanism and buffers the operation of the movable contact via the link mechanism; With
The operating device includes a projecting inlet springs case accommodating the closing spring to inject the stationary contactor and the movable contactor, a cutoff spring case storing the cutoff spring for blocking the stationary contactor and the movable contactor In a gas circuit breaker having
The shut-off section tank, the link mechanism section, and the operating device are installed adjacent to each other in the lateral direction, and a gas seal chamber communicating with the shut-off section tank is formed between the shut-off section tank and the operating device. The shock absorber is disposed in a lower portion of the chamber, and the link mechanism portion is connected to a rotating shaft that penetrates the gas seal chamber, a first lever fixed to the rotating shaft, and one end connected to the first lever. And an insulating rod having the other end connected to the movable contact, a second lever fixed to the rotating shaft, an output connected to one end of the second lever and the other end connected to the operating device. The first lever is formed longer than the second lever, and the first lever and the insulating rod are connected in the gas seal chamber, 2 lever is outside the gas seal chamber The shock absorber is connected to the rotary shaft outside the gas seal chamber, and gas seal means is provided in a portion of the gas seal chamber through which the rotary shaft passes. Characteristic gas circuit breaker. A horizontally disposed gas circuit breaker, a current transformer unit installed above and laterally of the gas circuit breaker, and a disconnector unit installed adjacent to the lateral current transformer unit; In a gas insulated switchgear comprising a cable head connected to the disconnector unit, and a main bus container connected to the current transformer unit installed above,
The gas circuit breaker, gas insulated switchgear, characterized in that the gas circuit breaker according to any one of claims 1 to 13.

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