KR100554629B1 - Vacuum beaker - Google Patents

Abstract

A vacuum valve is arranged on one side with the base interposed therebetween, and the fixed electrode side terminal of the fixed electrode side end of the vacuum valve and the movable electrode side terminal of the movable electrode side end are supported by a pair of insulating supports standing up on the base. Moreover, the operation mechanism is mounted on the opposite side to the vacuum valve with the base interposed therebetween, and the contact opening / closing link mechanism connected to the operation mechanism and the movable electrode side is connected by a drive member arranged along the supporting direction inside the insulating support.

Base, vacuum valve, terminal, contact, operating mechanism, opening and closing, link, movable electrode, fixed electrode

Description

Vacuum Circuit Breaker {VACUUM BEAKER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum circuit breaker, and more particularly, to a vacuum circuit breaker suitable for use in an opening and closing apparatus for controlling the opening and closing of electric power.

8 and 9 show examples of a gas insulated switchgear using a conventional vacuum circuit breaker, and FIG. 8 shows a gas insulated switchgear of a rated voltage of 72kv or 84kv class published in the Japanese Institute of Electrical Equipment and Applications (October 2001). It is a side sectional drawing which shows.

In the drawing, 1 denotes a gas insulated switchgear, 2 denotes a main body container enclosed with SF ₆ gas as an insulating medium, and 3 denotes a bus chamber, which houses a 3-phase bus 4 arranged through a plurality of juxtaposed devices. . 5 is a circuit interrupter which interrupts the branch main circuit branched from the bus 4, 6 is a vacuum circuit breaker in which the upper end is connected to the circuit interrupter 5 by the connecting conductor 5a, and 7 is the lower end of the circuit breaker 6. Is connected to or disconnected from the connecting conductor 8 to be described later, and the circuit interrupter for interrupting the circuit, 8 is a three-phase connecting conductor disposed at the rear of the main body tank 2 in the vertical direction. 9 is a cable head connecting portion mounted on the top of the connecting conductor 8, 10 is a cable head connected to the cable head connecting portion 9 through a wall of the main body container 2, and 11 is a cable head 10 once. This is a cable that is inserted and connected. In addition, the circuit from the bus 4 to the cable 11 is usually called a main circuit. 12 is a CT mounted on the outer circumference of the cable 11, 13 is a ground switch for connecting or disconnecting the connection conductor 8 to ground the main circuit, and 14 is an arrester.

In this way, the main devices such as the circuit breaker 5, the vacuum breaker 6, the circuit breaker 7 and the cable head 10 of the gas insulated switchgear are all connected by the connecting conductors 5a, 7a, 8, and the like. It is connected to another device.

FIG. 9 is a side view of the vacuum circuit breaker 6 used in the apparatus of FIG. 8, in which 15 is a base, 16 is a vacuum valve, and 17 is a movable electrode side mounted at the end of the movable electrode side of the vacuum valve 16. FIG. Terminal, 18 is a fixed electrode side terminal mounted at the end of the fixed electrode side of the vacuum valve 16, 19 is an insulating support for supporting the movable electrode side terminal 17 and the fixed electrode side terminal 18, 20, 21 is A contactor for connection for connection with the main circuit, 22 is a pressure contact link mechanism for driving a movable electrode (not shown) of the vacuum valve 16, 23 is an operation mechanism mounted on the base 15, 24 is a pressure contact link mechanism ( 22) and a driving rod connecting the operating mechanism 23, 25 is an electric field relaxation shield covering the outer circumference of the pressure contact link mechanism.

In the conventional vacuum circuit breaker 6 as described above, since the driving rod 24 is exposed in the main body container 2 of the gas insulated switchgear which accommodates it in the upper or lower portion of the vacuum circuit breaker 6, It is necessary to secure a space insulation distance with respect to this, and this has caused the main body container 2 to enlarge. As a result, since the main body container 2 needs to be enlarged, the gas insulated switchgear itself increases in size, and the cost of construction of the electrical chamber is increased due to the increase in transportation costs and the increase in the installation space. There was a problem that the usage of ₆ gas increases.

The present invention has been made to cope with the above-described problems, and an object of the present invention is to obtain a miniaturized vacuum circuit breaker. It is also an object of the present invention to obtain a vacuum circuit breaker capable of reducing the space insulation distance between peripheral devices. Another object of the present invention is to obtain a vacuum circuit breaker that is easy to assemble.

(1) The vacuum circuit breaker of the present invention includes a base which is mounted in a gas-tight manner on the container wall as part of a container wall of a gas insulated switchgear, a pair of insulating supports provided on the base, a fixed electrode side terminal, and a movable electrode side. A vacuum valve mounted on the base, supported by the insulating support, by the insulating support, between the operation mechanism provided on the base, and between the operation mechanism and the movable electrode side terminal of the vacuum valve. A vacuum circuit breaker having an operation link mechanism connected to open and close the vacuum valve, wherein the operation link mechanism extends through the insulation support and is covered by the insulation support.

(2) The fixed electrode side terminal and the movable electrode side terminal of the vacuum valve may include a connector that can be connected to a main circuit conductor of a gas insulated switchgear.

(3) The fixed electrode side terminal and the movable electrode side terminal may each include an electric field relaxation case.

(4) The vacuum circuit breaker of the present invention further includes a base, a vacuum valve disposed on one side of the base, a fixed-side terminal conductor connected to the fixed electrode side end of the vacuum valve, and a contact connected to the movable electrode side of the vacuum valve. An opening / closing link mechanism, a movable terminal conductor connected to the movable electrode side of the vacuum valve, a pair of insulating supporters standing on the base to support the fixed terminal conductor and the movable terminal conductor, respectively, and the base It is a vacuum circuit breaker having an operation mechanism mounted on the opposite side of the vacuum valve, and a drive member disposed in the insulating support body along a supporting direction and connected to the operation mechanism and the contact opening / closing link mechanism.

(5) The fixed-side terminal conductor is connected to and separated from a support portion which contacts the fixed electrode side end of the vacuum valve and supports the vacuum valve, an enclosure portion which supports the support portion and is enclosed in an open container type, and another main circuit. It can be provided with a terminal portion.

(6) The movable terminal conductor may include a terminal portion which surrounds the contact opening / closing link mechanism connected to the movable electrode side of the vacuum valve in an open container type and is connected or separated from other main circuits.

(7) The outer circumferential surfaces of the fixed-side terminal conductor and the movable-side terminal conductor can be connected to each other by curved surfaces.

(8) The outer diameter portions of both ends of the cylindrical portion of the vacuum valve may be covered with the fixed terminal conductor and the movable terminal conductor.

(9) The base may constitute a part of the container wall of the gas insulated switchgear.

(10) The contact opening and closing link mechanism may be a pressure contact link mechanism supported by the movable side terminal conductor.

(11) The insulated support body which supports the movable terminal conductor can be formed in hollow shape, and can arrange | position the drive member which drives by connecting an operation mechanism and a contact opening / closing link mechanism inside.

(12) An airtight chamber connected to the hollow hole of the insulated support body for supporting the movable terminal conductor is provided on the operating mechanism mounting side of the base, and the drive member for connecting the operation mechanism and the contact opening / closing link mechanism is driven in the airtight chamber. At the same time, one end of the operating rod penetrates through the wall of the hermetic chamber to arrange the lever shaft connected to the operation mechanism.

1 is a side cross-sectional view of a gas insulated switchgear containing the vacuum circuit breaker of the present invention.

FIG. 2 is a side cross-sectional view showing a state where the vacuum circuit breaker is drawn out from the gas insulated switchgear of FIG. 1.

3 is a side cross-sectional view illustrating the vacuum circuit breaker of FIG. 1.

4 is a rear view of the vacuum circuit breaker of FIG. 3.

5 is a plan view of the vacuum circuit breaker of FIG. 3.

6 is a perspective view of a movable electrode side terminal of the circuit breaker of FIG. 3.

FIG. 7 is a view of the lever shaft of the circuit breaker of FIG. 3 as viewed in the arrow A-A direction of FIG.

8 is a cross-sectional view showing a conventional gas insulated switchgear.

9 is a side view of the vacuum circuit breaker of the gas insulated switchgear shown in FIG. 8.

1 to 7 show a gas insulated switchgear using the vacuum circuit breaker of the present invention. In the drawing, 50 denotes a main body container in which SF ₆ gas is sealed as an insulating medium therein, 51a is a first bus chamber loaded on top of the main body container 50, and 51b is disposed adjacent to the first bus chamber 51a. The second bus bar chambers 52a and 52b are connected to each other by juxtaposing a plurality of gas insulated switchgear arranged in parallel. In the bus chamber 51a, a circuit interrupter 53 is connected to a branch line 52b from the bus line 52a by a bolt or the like. The circuit interrupter 53 operates the movable contact portion 53a from side to side in FIG. 1 to connect and disconnect the fixed contact portion 53b to interrupt the branch main circuit. The fixed contact portion 53b is attached to the tip of the through-conductor 54a extending in the bushing 54 supported through the partition wall between the main body container 50 and the bus chamber 51a.

In the main body container 50, a first ground switch 55 supported at the lower end of the through conductor 54a of the bushing 54 supported by the partition wall between the bus bar chamber 51a and the main body container 50 is provided. have. The ground switch 55 is a fixed contactor 55b provided in the main body container 50, a movable contactor 55a which is separated or brought into contact with the fixed contactor 55b, and a link mechanism 55d for driving the movable contactor 55a. ) And a substantially hollow electric field relaxation conductive case 55c covering the link mechanism 55d. The conductive case 55c of the ground switch 55 is directly connected mechanically and electrically to the through conductor 54a. Such direct connection is, for example, by screwing a bolt (not shown) extending through the conductive case 55c from the inside into a bolt hole formed in the lower end of the through conductor 54a, and passing through the conductor 54a. This can be achieved by supporting the conductive case 55c between the bottom of the bolt and the bolt head. The movable contactor 55a operates in the left-right direction (front and rear direction of the gas insulated switchgear) in FIG. 1, and disconnects or connects the fixed contactor 55b to ground the main circuit. A connecting conductor 56 formed in an L-shape as viewed from the side is fixed to the lower portion of the conductive case 55c of the ground switch 55 by a bolt or the like, and at the lower end thereof in detail with reference to FIGS. The connection part 57 connected to the connection terminal 82 (refer FIG. 3) provided in the terminal part 71a of the vacuum circuit breaker 58 demonstrated is provided toward the front side of a main body container.

Details of the vacuum circuit breaker 58 connected to the ground switch 55 through the connecting portion 57 will be described with reference to FIGS. 3 to 5, and the vacuum circuit breaker 58 is formed at the opening of the front surface of the main body container 50. A base 74 mounted to cover 50a, an operation mechanism 77 provided on the outer surface of the base 74, insulating supports 75 and 76 provided on the inner surface of the base 74, and the insulating support 75 76 is supported by the terminal portion 70a on the fixed electrode side and the terminal portion 70b on the movable electrode side, and includes a vacuum valve 70 having the fixed electrode and the movable electrode. The fixed electrode side terminal 71 and the movable electrode side terminal 72 which support the respective terminal portions 70a and 70b of the vacuum valve 70 each have an electric field relaxation case having a curved shape so that the outer periphery can relax the electric field. Equipped. The fixed electrode side terminal 71 and the movable electrode side terminal 72 are attached to the insulating support members 75 and 76 by appropriate fixing means such as bolts, respectively.

The terminal portion 70b on the movable electrode side below the vacuum circuit breaker 58 is connected to the ground switch 59 via a connector provided on the movable electrode side terminal 72 mounted on the insulating support 76 with bolts or the like ( 59d). The ground switch 59 has a movable contact 59a which operates in the front-rear direction (left and right in the figure) of the main body container 50 in FIG. 1 by the rotation of the operation shaft 59c, and the movable contact 59a The main circuit is grounded by being contacted or separated from the fixed contact 59d. The movable contact side of the ground switch 59 is covered by the electric field relaxation conductive case 59e toward the front side of the main body container 50, and the connector 59d is mounted on the front surface of the conductive case 59e. Coupling with the terminal of the vacuum circuit breaker (58).

The circuit interrupter 60 is provided on the rear wall of the main body air 50. The circuit interrupter 60 is operated up and down in FIG. 1 by rotation of the operation shaft 60f between the movable contact portion 60a, the fixed contact portion 60b, the movable contact portion 60a, and the fixed contact portion 60b. A movable contactor 60c contacting or separated from the movable contact portion 60a to interrupt the main circuit, and an insulating support 60d mounted on the base 60e to support the movable contact portion 60a and the fixed contact portion 60b, respectively. Equipped with. The movable contact portion 60a and the fixed contact portion 60b are covered by an electric field relaxation conductive case 60g and a conductive case 60h mounted on the insulating support 60d. The circuit interrupter 60 is mounted in the main body container 50 by fixing the base 60e to the rear wall of the main body container 50. The conductive case 60h of the circuit interrupter 60 and the conductive case 59e of the ground switch 59 are coupled and electrically connected to each other by a bolt (not shown).

On the rear wall of the main body container 50, a ground switch 61 is disposed above the circuit breaker 60 and grounds the main circuit through the main body container 50. As a result of the rotation of the operating shaft 61c, the movable contact 61a operating left and right toward the rear of the main body container 50 in FIG. 1 is detached from the fixed contact 61b to ground the main circuit. Similarly to the circuit interrupter 60 in the outer circumferential degree of the operation part of the ground switch 61, the conductive case 61d for electric field relaxation is covered, and the conductive case 61d is directly connected to the conductive case 60g of the circuit breaker 60. In contact with each other and bolted together.

Above the circuit interrupter 61, a cable head connecting member 62 is further provided. The cable head connecting member 62 includes a contactor 62a connected to the front end connecting portion of the cable head 63 inserted through the rear wall of the main body container 50, the operation shaft 62c, and the operation shaft 62c. The contact rod 62b which contacts or separates the lower end of the lightning arrester 65 mounted to the main body container 50 by rotation, and the electric field relaxation conductive case 62d which covers the outer periphery of the cable head connection member 62 are provided. Doing. The cable 64 extends from the cable head 63.

In addition, the conductive cases 59e, 60g, 60h, 61d, 62d covering the outer circumferences of the ground switch 59, the circuit breaker 60, the ground switch 61, and the cable head connecting member 62 are each as shown. The outer periphery of the mechanism can be covered independently, and the frame may be formed by the outer periphery of each device in shape processing for electric field relaxation.

In addition, as shown in FIG. 1, the ground switch 59 is firmly bonded to the lower portion of the fixed contact portion 60b of the circuit breaker 60 by using a bolt or the like in the form of joining the respective conductive cases. In addition, the ground switch 61 is firmly joined to the upper portion of the movable contact portion 60a of the circuit interrupter 60 by using a bolt or the like in the form of joining the respective conductive cases. In addition, the cable head connection member 62 is firmly joined to each other by using a bolt or the like in the form of joining the respective conductive cases to the upper portion of the ground switch 61.                 

Thus, by connecting the conductive case of the ground switch 59, the circuit breaker 60, the ground switch 61, and the cable head connection member 62 to each other firmly, a part of the main circuit is formed without separately preparing a connection conductor. It is possible to configure each device compactly. In addition, by arranging the base 60e under the circuit breaker 60, the switch unit 66 is formed by combining the ground switch 59, the circuit breaker 60, and the ground switch 61 into one with only one base. Can be formed. In addition, you may handle the switch unit 66 which added the cable head connection member 62 further to the switch unit 66 as shown to FIG. 1 and FIG. The switch unit 66 can be easily removed from the main body container 50 as one assembly by releasing the coupling of the main body container 50 and the base 60e.

2 illustrates a state in which the vacuum circuit breaker 58 is removed in the state of FIG. 1. In the figure, 50a is a breaker mounting opening in the front of the main container. The 1st connector 57 and the 2nd connector 59a are arrange | positioned toward the insertion direction of the breaker 58, and can be easily mounted also when the breaker 58 is inserted in the main body container 50. FIG.

In addition, since nothing is arranged in the lower part of the position from which the breaker 58 was removed, a person can easily enter and a check operation becomes easy.

Moreover, the operation direction of the movable contactor 60c of the circuit interrupter of the switchgear unit 66 is made up and down, and the operation directions of the movable contactors 59a, 61a of the lower ground switch 59 and the upper ground switch 61 are changed. Since the main body 50 is operated to the rear, the height of the switch unit 66 can be made low (the result can reduce the main container 50). It becomes easy.                 

3 to 7 show details of the vacuum circuit breaker 58, in which 70 is a vacuum valve having a movable and fixed electrode therein, and 71 is a fixed electrode side terminal of the vacuum valve 70. The outer circumference has a curved shape in order to relax the electric field, and contacts the fixed electrode bar 70a at the fixed side end of the vacuum valve 70 across the left and right walls of the fixed electrode side terminal 71 inside the leg. It is provided with a support portion for supporting. 72 is a movable electrode side terminal of the vacuum valve 70. The outer periphery has a curved shape to reduce the electric field, and the flexible conductor connection portion extends between the left and right walls of the movable electrode side terminal 72 in a leg shape. And the movable electrode portion of the vacuum valve 70 and the flexible conductor connecting portion 72a are connected by the flexible conductor 73.

74 is a plate-shaped base which serves as a part of the side wall of the main body container 50, 75 is an insulated support body which is installed perpendicular to one surface of the base to support the fixed electrode side terminal 71, and 76 has a through hole 76a therein. The insulator is installed vertically on one surface of the base 74 like the insulator support 75 to support the movable electrode terminal 72, and the insulator 77 has a base 74 therebetween and a vacuum valve 70. The operation mechanism 78 of the circuit breaker mounted on the opposite side is an operation lever chamber formed in a hermetic manner by pressing and contacting a box-shaped body to the surface of the operation mechanism 77 mounting side of the base 74 to form a hole 74a formed in the base. It communicates with the through-hole 76a through.

79 is a lever shaft which distributes the driving force of the operating mechanism 77 from the lever 79a corresponding to each phase to the movable electrode of the vacuum valve 70, and is a bearing mounted on the base 74 of the operating lever chamber 78. It is rotatably supported at the same time, and one end is connected to the operation mechanism 73 via an operating rod 77a which is guided through the upper wall of the lever chamber 78 to the outside. 80 is a pressure contact link mechanism which is connected to the movable electrode rod 70b of the vacuum valve 70 and rotates with the shaft 80a supported by the movable electrode terminal 72 as a point, and rotates with the shaft 80a as the rotary shaft. A lever 80b and a pressure contact spring 80c, one end of which is pivotably mounted to the lever 80b and the other end of which is connected to the movable electrode bar 70b, are provided.

81 is a driving rod for connecting the lever 79a and the other end of the lever 80b of the pressure-contacting link mechanism 80, and the driving rod 82 is located above the fixed electrode side terminal 71 formed in an approximately L-shape from the side. The connecting terminal is provided to protrude in the insertion direction of the breaker 77 in the rising portion, it is in contact with or separated from the first contact (57). 83 is a connection terminal which protrudes from the lower part of the movable electrode side terminal 72 in the insertion direction of the breaker 77, and is connected to the second contact 59d. 84 is a shield covering the outer periphery of the intermediate part of the vacuum valve 70 to cylindrical shape.

As shown in Fig. 6, the movable electrode side terminal 72 is substantially hollow, the entire outer surface of which is curved, has a conductive field relaxation case, and includes the top, bottom, left and right sides of the pressure-contact link mechanism 80. Further, since both side walls extend in the insertion direction of the breaker 58 than the flexible conductor 73 or the pressure contact link mechanism 80, the electric field relaxation effect of this portion is increased, and the periphery of the movable electrode side terminal 72 is increased. The space insulation distance between the other members in the vicinity can be made small. The movable electrode side terminal 72 has a flange portion 72b for bolting to the insulating support 76, and the drive rod 81 passes through the flange portion 72b. The movable electrode side terminal 72 also has a circular opening 72c at the top for accommodating the lower end of the vacuum valve 70, and is electrically coupled to the other connecting conductor (connector 59d of FIG. 1, etc.) at the bottom thereof. The opening 72d (FIG. 4) for inducing the connected connector 83 is provided. In addition, 72 d of assembling adjustment openings are formed on the side surface of the electric field relaxation case 72a for the pivoting of the link mechanism accommodated inside.

The fixed electrode side terminal 71 is also bolted to the insulating support 75 in a similar structure with the electric field relaxation case shown in FIG. 6, covering the upper end of the vacuum valve 70 and simultaneously supporting the connector 82. It has an opening 71c which can be connected to a connecting conductor (connector 57, etc. of FIG. 1) through it, and has a curved structure which relieves the electric field around the fixed electrode side terminal 71. As shown in FIG.

FIG. 7 is a schematic view of the lever shaft 79 of the vacuum circuit breaker 58 shown in FIG. 3 seen from the left side of FIG. The lever shaft 79 is rotatably supported by a bearing 79d provided in the airtight lever chamber 78 provided on the base 74. A lever 79b is fixed to this lever shaft 79, and an operating rod 77a extending from the operating mechanism 77 via a link 79f is connected. It penetrates through the lever chamber 78 in the state which kept airtight by the operating rod 77a sealing material 79e, and the lever shaft 79 is rotated by the operating mechanism 77. As shown in FIG. An arm 79a having a tip end connected to the drive rod 81 is fixed to the lever shaft 79 in the lever chamber 78, and the drive rod 81 is operated by the rotation of the lever shaft 79. .

Thus, the vacuum circuit breaker 58 of the present invention is a base 74 which is mounted in the airtight manner to the main body container 50 as a part of the main body container 50 of the gas insulated switchgear, and the base 74, for example. A pair of insulating supports 75 and 76 provided on the outer surface are provided. The base 74 is also equipped with a vacuum valve 70 supported by the fixed electrode side terminal 71 and the movable electrode side terminal 72 by the insulating supports 75 and 76. An operating mechanism 77 is provided on the inner side of the base, and the driving rod 81 opens and closes the vacuum valve 70 between the operating mechanism 77 and the movable electrode side terminal 72 of the vacuum valve 70. The pressure contact link mechanism 80 is provided. The driving rod 81 extends through the insulating support 76 supporting the movable electrode side terminal 72 and is covered by the insulating support 76.

In addition, the fixed electrode side terminal 71 and the movable electrode side terminal 72 of the vacuum valve 70 are provided with connectors 82 and 83 which can be connected to the main circuit conductor of the gas insulated switchgear, respectively. The fixed electrode side terminal 71 and the movable electrode side terminal 72 are each provided with an electric field relaxation case.

By setting it as such a structure, the following effects are acquired. By passing the driving member 81 through the through hole 76a of the insulating support 76, it is not necessary to arrange the driving rod 24 above the upper insulating support 19 as in the conventional example of FIG. The height of the breaker can be configured very low compared to the configuration of FIG. 8. In addition, by increasing the electric field relaxation effect around the fixed electrode side terminal 71 and the movable electrode side terminal 72, the space insulation distance between each phase or the earth (between each phase and the main body container 50) can be reduced. Since it can be made small, a device can be comprised compactly.

1 or 3, both ends of the vacuum valve 70 are inserted into the fixed electrode side terminal 71 and the movable electrode side terminal 72, respectively, and the outer periphery of the end portion of the vacuum valve 70 is inserted. It is comprised so that it may be covered by the fixed electrode side terminal 71 and the movable electrode side terminal 72. FIG. With such a configuration, since the junction between the ceramic cylinder and the metal end plate is provided, a vacuum circuit breaker that can greatly alleviate the electric field concentration at the end of the vacuum valve 70 in which electric field concentration easily occurs can be obtained.

As described above, the vacuum circuit breaker of the present invention includes a base which is mounted in the airtight manner on the container wall as part of the container wall of the gas insulated opening device, a pair of insulating supports provided on the base, the fixed electrode side terminal, and the movable part. A vacuum valve mounted on the base having an electrode side terminal and supporting both terminal portions by the insulating support, an operation mechanism provided on the base, and between the operation mechanism and the movable electrode side terminal of the vacuum valve. A vacuum circuit breaker having an operation link mechanism connected to and opened to open and close the vacuum valve, wherein the operation link mechanism extends through the insulation support and is covered by the insulation support. Therefore, the vacuum circuit breaker can be miniaturized, and the space insulation distance between the peripheral circuit devices can be made small.

As described above, the vacuum circuit breaker according to the present invention is particularly useful as a vacuum circuit breaker suitable for use in a power switchgear control panel using a gas insulated switchgear.

Claims (12)

A base mounted in a hermetic manner to the main body container as part of a main body container of a gas insulated switchgear; A pair of insulating supports installed on the base, A vacuum valve having a fixed electrode side terminal and a movable electrode side terminal, the both terminals being supported by the insulating support and mounted on the base; An operation mechanism provided on the base, A vacuum circuit breaker having an operation link mechanism connected between the operation mechanism and the movable electrode side terminal of the vacuum valve to open and close the vacuum valve, And said operating link mechanism extends through said insulating support and is covered by said insulating support. Bass, A vacuum valve disposed on one side of the base, A fixed-side terminal conductor connected to the fixed electrode side of the vacuum valve, A contact opening / closing link mechanism connected to the movable electrode side of the vacuum valve, A movable terminal conductor connected to the movable electrode side of the vacuum valve, A pair of insulating supports standing on said base to support said fixed-side terminal conductor and said movable-side terminal conductor, respectively;  An operation mechanism mounted on the opposite side to the vacuum valve with the base interposed therebetween, A driving member disposed in the insulated support member along a supporting direction and connected to the driving mechanism and the contact opening / closing link mechanism for driving; Vacuum breaker with a. The method of claim 2, And the driving member for supporting the movable terminal conductor is formed in a hollow shape and arranged therein with a driving member for connecting and operating the operation mechanism and the contact opening and closing link mechanism. delete delete delete delete delete delete delete delete delete

Images