TW563150B - Gas insulated switch gear - Google Patents

Abstract

A gas insulated switch gear has a housing 50 provided with a feed through conductor 54a in an upper part thereof, a ground switch 55 and a vacuum circuit breaker 58 disposed and connected vertically below the feed through conductor 54a, a switching unit 66 and cable heads 63 disposed and connected to a lower end of the vacuum circuit breaker 58 vertically up to the upper rear part of the housing 50, to form a U shaped main circuit including these apparatuses from the feed through conductor 54a to the cable heads 63. The apparatuses constituting the main circuit are electrically connected with each other by directly being fixed on field reducing conductive cases 55c, 59e, 60g, 61d and 62d of the moveable contact of each apparatus.

Description

563150 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a gas-insulated electrical switchgear that performs switch control of electric power, and particularly relates to a higher voltage used at a rated voltage of 60 kV or more Gas-insulated electrical switchgear. [Prior Art] Figs. 7 to 9 show the structure of a conventional gas-insulated electric switchgear. Fig. 7 is a side sectional view of a gas-insulated electrical switchgear with a rated voltage of 72kV or 84kV as published by the Institute of Electrical Equipment (Japanese version: Heisei 丨 3 years 丨 October issue). In the figure, the number 1 is a gas-insulated electrical switchgear, 2 is a main body container sealed with sf6_ gas as an insulating medium, 3 is a busbar compartment, and houses a 3-phase busbar arranged between a plurality of devices arranged side by side. 4 . > The other 5 is for discontinuous disconnection of the diverging main circuit branched from the bus 4 and the 6 is a vacuum circuit (vacuum circuit) for connecting the upper terminal to the disconnection switch 5 by the connection conductor 5a. breaker), 7 is a disconnecting switch that uses a connection conductor 7a and a vacuum circuit breaker _ ϊ ϊ 接触 to contact / leave the connection conductor 8 described later to perform a circuit interruption switch, 8 is directed upward and downward in the rear part of the main body container 2 Phase-conducting conductors, 9 are installed on the remote end of the cable, but are connected to the cable 3, and 10 is the cable head connection port P of the H part. The external cable head '1 1 is a cable that is connected to the-end by inserting the cable head i 〇, and usually the circuit from the bus 4 to the cable u is called the main circuit.

The CT on the periphery of the cable 11 is a grounding switch which is in contact with / off from the connection conductor 8 and grounded on the circuit, and 4 is a lightning arrester. Also lamp As mentioned above, the cut-off switch 5, vacuum of the gas-insulated electrical switchgear

563150, description of the invention (2)-The main machines such as circuit 6, disconnect switch 7 and cable 10 are connected to other machines through conductors 5a, 7a and 8. Figure 8 is a side view of the vacuum circuit breaker 6 used in the device of Figure 7: In the figure, the symbol 15 is a substrate '16 is a vacuum bulb, which is mounted on the movable electrode side of the vacuum chamber 16 The movable electrode side end of the end ^ 1 8 is a fixed electric power installed at the end of the fixed electrode side of the vacuum chamber 16 = ^ ^ '9 is used to support the movable electrode side terminal 丨 7 and the fixed electrode side termination Insulated support of station 8, 20 and 21 are used for connection with the main circuit. Γ is used to drive the crimping of the movable electrode (not shown) of vacuum chamber 16; The operating mechanism 24 mounted on the substrate 15 is a driving rod for connecting the crimping contact 22 and the operating mechanism 23, and is used to cover the electric field relaxation shield around the periphery of the inverse mechanism. Side section J: The figure shows the conventional structure of other gas-insulated electrical switchgears: Tongerkang; the same symbols shown in Figures 7 to 8 indicate the corresponding components. The conventional gas-insulated electrical switchgear I described in the second aspect of the body is connected to the device 1 3, the electric-undercapacity vacuum circuit breaker 6, the disconnect switch 7, and the grounding switch. Therefore, the connection portions 9 use each other. The connecting conductors 5a, 7a, and 8 are separated from each other, so it is necessary to ensure that the space between the machines or components and the insulation distance between them is also driven by the main body container 2. In addition, the vacuum circuit breaker 6 and the minute 24 must be exposed in the main body container 2 only. Therefore, this is the reason. In addition, the insulation distance between Γ becomes larger. The container 2 becomes larger. The container 2 becomes D. Fig. 9 When the safety rate of insulation resistance is increased, the body is large. As a result, since the main body container 2 must be enlarged,

563150 V. Description of the invention (3) This results in an increase in the construction cost of the electrical room due to the increase in the size of the gas-insulated electrical switchgear itself, the increase in freight costs, and the increase in installation space. Due to the increase in the size of the main body container 2, SF gas is used as an insulating medium. Increased usage. The present invention has been developed by a developer to solve the above-mentioned problems, and an object thereof is to obtain a miniaturized gas-insulated electrical switchgear. Furthermore, the object of the present invention is to obtain a gas-insulated electrical switchgear having a simple structure and easy assembly and maintenance. Another object of the present invention is to obtain a gas-insulated electrical switchgear which is safe during maintenance. [Disclosure of the Invention] (1) The gas-insulated electrical switchgear of the present invention is characterized by having: a main body container sealed with an insulating gas; a penetrating conductor extending through a container wall above the main body container and having an outer end connectable with a bus bar; and The lower end of the through-conductor is connected so that the through-conductor is grounded to the grounding switch of the body container; the vacuum interrupter connected to the lower end of the grounding switch and is generally configured as a vertical direction; A switch unit that is vertical and includes a disconnect switch and a grounding switch; a cable head that extends through the upper part of the container wall at the rear of the body container, and that the inner end can be connected to the switch unit and the outer end can be connected to the cable; and The arrester is connected to the upper part of the switch unit, and the equipment constituting the main circuit that penetrates the conductor to the cable head is arranged in a substantially U shape. (2) Furthermore, the gas-insulated electrical switching device of the present invention is characterized by: a body container sealed with an insulating gas; a through conductor extending through the container wall above the body container, and an outer end which can be connected to the bus bar; and a through conductor

314076.ptd Page 9 563150 V. Description of the invention (4) Conductor connection, the grounding switch that grounds the conductor to the body container; is connected to the grounding switch, and is generally configured so that the lower end of the vacuum circuit breaker in the vertical direction is disconnected from the vacuum The lower end of the switch is connected, and is generally configured as a switch unit in the vertical direction and extends through the container wall at the rear of the body container. The inner end can be connected to the switch unit, and the outer end can be connected to the cable head of the cable. ： Connected to the lower end of the vacuum circuit breaker to ground the vacuum circuit breaker to the main body container; Connected to the lower end of the vacuum circuit breaker to be installed on the upper part of the grounded switch; and is generally arranged vertically and installed at the rear of the main body container The cut-off switch on the container wall and the upper part of the cut-off switch are connected to ground the cut-off switch to the grounding switch of the main container. [Embodiment] Figs. 1 to 6 are sectional views of a gas-insulated electrical switch device according to a first embodiment of the present invention. Fig. 1 is a sectional view of a gas-insulated electrical switch device according to a first embodiment of the present invention. Fig. 2 is a state diagram after the vacuum circuit breaker is extracted in Fig. 1. Fig. 3 is a state diagram after the switch unit is extracted in Fig. 2. Fig. 4 is a vacuum circuit breaker 4 (a) in Fig. 1. It is a side view, 4 (b) is a rear view, FIG. 5 is a switch of FIG. 1 〇〇 Early, 5 (a) is a front view, 5 (b) is a side view, and FIG. 6 is a view from the first Figure VI-VI. In these drawings, the symbol 50 is a main body container enclosed with SF years old and used as an insulating medium. 5 1 a is the first busbar compartment placed on the upper part of the main body container 50, and 5 1 b is the same as the first 1 busbar compartment 5 1 a is a second busbar compartment arranged adjacently, 52a and 52b are buses that connect and connect a plurality of gas-insulated electrical switchgears, and are connected to the busbar. 0 in the busbar compartment 5 1 a Inside '1 from bus 52a

314076.ptd Page 10 563150 V. Bifurcation line 5 2 of the description of the invention (5) 5 The disconnect switch 5 3 is connected by a connector such as a bolt. The disconnect switch 53 is to move the movable contact portion 53a leftward and rightward in FIG. 1 and contact / detach the movable contact portion 53a from the fixed contact portion 5 3b to interrupt the main circuit. The fixed contact portion 53b is attached to the front end of the penetrating conductor 54a extending into the bushing 54 by a bolt or the like, and the bushing 54 is supported through the partition wall between the main body container 50 and the bus bar chamber 51a. A first grounding switch 55 is provided in the main body container 50, and the first grounding switch 55 is supported between the busbar compartment 5a and the main body container 50.

The bushing 54 of the partition wall penetrates the leading end of the conductor 54a. The grounding switch 55 has a fixed contact 5 5b provided in the main body container 50, a movable contact 55a contacted / detached from the fixed contact 5 51, an operation mechanism 55d for driving the movable contact 55a, and A conductive case 55c for covering a substantially hollow electric field of the operation mechanism 55d is covered. The conductive case 55c of the ground switch 55 is directly and mechanically connected to the penetrating conductor 54. Such a direct connection can be screwed to a bolt hole provided at the lower end of the penetrating conductor 54a by a screw test (not shown) extending through the conductive case 55e from the inside, and the conductive case 55c can be held at the penetrating conductor 54a. It is realized between the lower end and the bolt head.可 mrm 1 图 # In the left and right direction (gas-insulated electrical switch

v and touch / leave relative to the fixed contact 5 to ground the circuit. A part of the conductive case 55 of the grounding switch 55 is fixed with a bolt or the like from the side. A and the conductor 56 are fixed from the side, and the lower end is directed to: the body's second connection I7 break: 57 can be related to the fourth The connection terminal 82 provided in the terminal portion 71a of the direct air circuit breaker 5 58 to be detailed in the figure (see section ^

563150 V. Description of the invention (6) Figures) are interconnected. The vacuum circuit breaker 58 connected to the grounding switch 5 5 via the connection portion 57 will be described in detail below with reference to FIG. 4. The vacuum circuit breaker 58 has a base plate 7 4 which is mounted so as to cover the front opening 5 0 a of the box body container 50. ; Operating mechanism 77 provided on the outer surface of the base plate 74; Insulation ^ support bodies 75 and 7 6 installed on the inner surface of the base plate 74; Insulation support bodies 7 5 and 76 are used to support the terminal portion 7 0 a on the fixed electrode side And the movable electrode-side terminal portion 70b ', and a vacuum chamber 70 having a fixed electrode and a movable electrode. In order to reduce the electric field in the periphery, each terminal portion of each of the terminal portions 70a and 701) of the flapping vacuum valve 70 is supported by a case having a curved shape in order to reduce the electric field in the periphery. cover. The casings are respectively mounted on the insulating supports 75 and 76 by appropriate fixing means such as bolts. The terminal portion 70b on the movable electrode side of the vacuum circuit breaker 58 is connected to the terminal 59d of the grounding switch 59 through a terminal provided on the conductive case of the insulating support body 76 using bolts or the like. The grounding switch 59 has a movable contact 59a that moves toward the front and rear directions (left and right in the drawing) of the main body container 50 in FIG. 1 by the rotation of the operation shaft 59c. This movable contact 59a is fixedly connected Point 59 to touch / leave the disc to ground the main circuit. The movable contact side of the grounding switch 59 facing the front side of the main body container 50 is covered by a conductive case 59e with an electric field relief. The terminal 59d is installed in front of the conductive case 59e and is connected to the vacuum circuit breaker 58. Terminal combination. A cut-off switch 60 is provided on the rear wall of the main body container 50. The disconnect switch 60 has: a movable contact portion 60a; a fixed contact portion 60b; and between the movable contact portion 60a and the fixed contact portion 60b, the first contact tank is rotated by the operation shaft 60f. Move up and down to contact / detach from the movable contact part 60a to perform main power

563150 V. Description of the invention (7) The intermittent movable contact 6 0 c of the road; and the insulating support 6 installed on the base 60 e to support the movable contact portion 6 0 a and the fixed contact portion 6 0 b, respectively. 0 d. The movable contact portion 60a and the fixed contact portion 60b are covered with a conductive case 60 g for electric field relaxation, which is mounted on the insulating support 60d. The cut-off switch 60 fixes the base 60e to the rear wall of the main body container 50, thereby being installed in the main body container 50. The conductive case 60g of the cut-off switch 60 and the conductive case 59e of the grounding switch 59 are electrically connected by a bolt (not shown).

The rear wall of the main body container 50 is provided with a grounding switch 61 which is disposed above the cut-off switch 60 and grounds the main circuit through the main body container 50. By turning the operating shaft 6 1 c, the movable contact 6 1 a which moves leftward and rightward after the main body container 5 0 in FIG. 1 contacts / leaves the fixed contact 6 1 b to ground the main circuit. The periphery of the operating part of the grounding switch 6 丨 and the cut-off switch 6 are also covered by the conductive case 6 丨 d for electric field mitigation. The conductive case 6 1 d directly contacts the cut-off switch 6 〇 The conductive case 60 is connected by a bolt or the like. A cable head connecting member 62 is provided above the circuit breaker 61. The electric slow head 1 connecting member 6 2 has: a contact 62a connected to an electric terminal / connecting portion inserted through the rear wall of the main body container 50; an operating shaft 62c;

It is electrically connected to the lower ring Γ of the lightning arrester 65 installed in the main body container 50 and is connected to the Λ rod 6Γ; and a conductive case 62d for covering the cable head connection ^ 64 == each, the friend and the use. From the cable head 63, there is an electrical winding. In addition, it is used to cover the grounding switch 5 9, the cut-off switch 6 〇, the grounding switch

563150 V. Description of the invention (8) Gate 6 1. Electrically conductive shell 5 9 e, 60 g, 61 d, and 62 d on the periphery of the electric head connection member 6 2 can be independently shown and covered as shown in the figure The periphery of each appliance may be a frame that has been subjected to a shape treatment for reducing the electric field on the periphery of each device. In addition, as shown in FIG. 1, a lower portion of the fixed contact portion 60b of the cut-off switch 60 is fixedly connected to each of the conductive cases with bolts or the like so that the grounding switch 59 is connected to each of the conductive cases. On the upper part of the movable contact portion 60 of the cut-off switch 60, a bolt or the like is used to securely connect the ground switch 61 to each conductive case. Furthermore, the upper portion of the grounding switch 6 丨 is fixedly joined with a cable head connecting member 62 by using a bolt or the like to join the respective conductive cases. As described above, "by connecting the grounding switch 59, the cut-off switch 60, the grounding switch 61, and the conductive housing of the electric head connection member β 2 directly and firmly to each other", a part of the main circuit can be constituted. It is not necessary to prepare a separate connection conductor, and the configuration of each device can be simplified. Furthermore, by arranging the base 60 o at the lower part of the cut-off switch 60, the ground switch 59, the cut-off switch 60, and the ground switch 61 can be combined into one by using only one base.器 Unit 6 6. Further, as the switch unit 66, an electric winding connection member 62 may be further added to the switch unit 66 as shown in Figs. 1 and 2. Switching unit 6 6 /. To uncouple the body trough device 50 from the base 60 e, one assembly can be easily removed from the body container 50. Fig. 2 shows a state where the vacuum circuit breaker 58 is removed from the state shown in Fig. 1. In the figure, reference numeral 50a is an opening for installing a circuit breaker in front of the main body container. And the j-th terminal 5 7 and the second end are arranged in the insertion direction of the circuit breaker 5 8

314076.ptd Page 14 563150

In the case of 50, it is also inserted into the main body container. 5. Description of the invention (9) Sub 5 9d, so the circuit breaker can be easily installed. In addition, any object is easy. In the lower part of the position after the circuit breaker 58 is removed, the operator can easily enter it, making the maintenance operation j more convenient. In addition, since the operation direction of the switch unit 66 to cut 60 ° is moved up and down, In addition, the movable contact 59 of the sweat, the movable contact 59a of the upper ground switch 61, and the ground switch are moved to the rear of the main body container 50, so they can be lowered in one direction (this, as a result, the main body container opening can be reduced Detachment / insertion of the height unit. Figure 3 shows the performance of the switch after removing the switch unit 66 from Figure 2. Figure 4 shows the circuit breaker, (a) is a side view. (B) is a rear view seen from the back of the main body container 50. In the figure, the symbol 70 is inside and is available, and the vacuum chamber of the fixed electrode, 71 is the fixed electrode side food of the vacuum chamber 70. The periphery of the son's body is formed into a curved shape in order to relax the electric field. Inside, it has a fixed electrode that bridges between the left and right walls of the fixed electrode side terminal 71 and L abuts against the fixed side end of the vacuum chamber 70. Stick 70 & Support The 72 is a movable electrode-side terminal of the vacuum chamber 70, and its outer surface is formed into a curved shape for the purpose of easing the electric field. Inside, it has a bridge shape between the left and right walls of the movable electric f side and the sub-72. The flexible conductor connecting part, and the flexible electrode 7 3 is connected to the movable electrode part of the vacuum chamber 70 and the flexible conductor connecting part 7 2 a. The symbol 74 is itself a part of the side wall of the main body container 50 Plate

563150 V. Description of the invention (10) Substrate, 75 is an insulating support standing on the surface of the substrate 74—the surface is 71, and 76 is a support having a through hole inside the electrode-side terminal support 75 also standing on the substrate 74 On one side, and is insulated from the insulated terminal 72, 77 is across the substrate? The operating mechanism of the circuit breaker on the side of 4A and 3 electrodes, 78 is the abutment of the box-shaped body against the operating mechanism of 2 = 70. 7 7 The side of the installation side is formed to be discouraged. The rust vortex man produces poor j 贫 ❿ wind holes in the shape of the operation lever, 70: 控制 Ϊ Ϊ plate 743 and communicate with the through hole 76a. Sub-number 79 疋 uses the corresponding control lever 79a to distribute the driving force to the movable electrode ^ of the vacuum M 70. The structure 77 of the two mounted on the two side walls of the operation lever chamber 78 is two, which is the utilization state, ... The end is connected through the control lever with:; == 70 of the movable electrode rod 70b, and the crimping connection machine which rotates the axis of the vacuum chamber as a fulcrum = heart == 冓 8_动, moving two l-shaped guards: the connection terminals protruding from the side are arranged to form the upper part of the upper part of the upper side of the terminal 71, and they are connected to each other via the second U 5 7. 8 The connection terminal provided on the lower part of the movable electrode side terminal protruding toward the insertion direction of the circuit breaker 58 is connected. 84 is a shield covering the periphery of the middle portion of the vacuum chamber 70. In addition, the movable electrode-side terminal 72 encloses the left and right sides of the crimp connection mechanism 80, and further extends both side walls toward the insertion direction of the circuit breaker 58 than the flexible conductor 73 or the crimp connection mechanism 80. The electric field in this part

563150 V. Description of the invention (11) The mitigating effect will become larger, and the space insulation distance between other components around this movable electrode-side terminal 72 can be reduced. By forming such a structure, the following effects can be obtained. 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 9 as shown in the conventional example in FIG. The structure of the figure can greatly reduce the height of the circuit breaker. Fig. 5 shows the switch unit, 5 (a) is a front view seen from the front side of the main body container 50, and 5 (b) is a side view. This structure has been described above, but if it is to be summarized, an insulating support 6 〇a is provided on the base 6 〇e, and then the movable contact portion 6 〇a and the fixed contact portion of the switch 6 〇 are cut off. 6 〇b is installed on the head of each insulating support 60d, and is connected to the grounding switch 5 9 at the fixed contact portion 60 a, and is connected to the grounding switch 6 1 ′ at the movable contact portion 6 〇a, and this connection is borrowed The curved surfaces are used to connect different planes around the cut-off switch 60 and the grounding switches 59 and 61, so that the housings with electric field slow conductivity are integrated with each other. The dagger is constructed as described above, that is, it does not require a conductor for connecting the cry switch 60, the grounding switch 59, 61, and can be an M-knife device. And 'by arranging the base 60 e in the cut-off switch 600, it is possible to use one base 60e to keep the separated movable contact part 60 ° a /' — the contact part 60b, and other grounding switches 59 , 61 杲 m & fixed 结 steadily binds to the cut-off switch 60, so the base 60 e of the switch unit 66. Bend σ can be. In addition, as shown in FIG. 5, by moving the J moving contact of the switch 6 〇

314076.ptd 563150 V. Description of the invention (12) The operating direction of 6 0c forms up and down points 5 9 a, 6 1 a. The operating direction shape of the switch unit 6 6 is further reduced. In addition, although the ground switch 6 1 is The combination is called a switch, and it is composed of the electric connector connection part 62 and the electric connector connection part described above, that is, it does not require a connection conductor between the two, but it can be more, as shown in Figure 1. The rear part of the vacuum circuit breaker 58 and the machine configuration are the structure of the containing machine which is roughly composed as a whole, and the knot can miniaturize the main body container 50. The ground switch 5 9 and 61 can be connected to the container body 50 inward, that is, south. The switch 5 9, the cut-off switch 6 〇, and the ground open unit 66, but can also be fixedly coupled to the upper part of the ground switch 6 1 and 6 2 as the switch unit 6 6 as shown in FIG. 5. The grounding switch 6 1 and the cable head connection portion 6 2 simplify the structure of the device in the main body valley device 50. Since the switch units 66 are arranged at the bottom and connected to each other, and are U-shaped, the main body container 5q can be simplified. Compared with the conventional example shown in FIG. Figure VI-V ^ sentence view 8 5 is a bearing with shielding function. Ϋ́ 付 糸 糸 8 6 is a drive that can be inserted into one end of the operation shaft rnf 61c, 62c and combined. The drive shaft 8 6 shown in the figure is external. The present invention is a storage device for removing m 4 as described above (circuit breakers, switches, etc.). & Adopt the enemy to reduce the number of J minus 10, make the connection between the machines and L $ intermediary, and take out the circuit breaker]] Fenyi Yi also has an earlier structure, can also use the bottom J room It is easy to switch on and off, and the assembly and disassembly of the main body make the assembly and disassembly much more difficult.

314076.ptd Page 18 563150 V. Description of the invention (13) Easy, so the structure of the storage device in the main body container can be simplified. [Industrial Applicability] The gas-insulated electric switchgear of the present invention is particularly suitable for use as a gas-insulated electric switchgear that performs switching control of electric power at a relatively high voltage of 60 kV or higher.

314076.ptd Page 19 563150 Brief description of drawings [Simplified description of drawings] Fig. 1 is a side sectional view of a gas-insulated electrical switchgear according to a first embodiment of the present invention. FIG. 2 is a state diagram after the circuit breaker is extracted from FIG. 1. FIG. 3 is a state diagram after the switch unit is extracted from FIG. 2. Fig. 4 is the circuit breaker of Fig. 1, 4 (a) is a side view, and 4 (b) is a rear view. Fig. 5 is the switch unit of Fig. 1, 5 (a) is a front view, and 5 (b) is a side view. FIG. 6 is a view viewed from the VI-VI direction of FIG. 1. FIG. 7 is a cross-sectional view of a conventional gas-insulated switch electric switchgear. Fig. 8 is a side view of the circuit breaker of Fig. 7; Fig. 9 is a side view of a conventional gas-insulated electrical switchgear 1 device 1 Gas-insulated electrical switchgear 2 Body container 3 Busbar compartment 4 Three-phase busbar 5, Ί, 53, 60 '60 Cut-off switch 5a Connecting conductor 6 Vacuum circuit breaker 7a connecting conductor 8 connecting conductor 9 cable head connecting part 10> 63 cable head 1 64 cable 12 CT 13 grounding switch 14, 65 lightning arrester 15 ^ 74 substrate 16 vacuum chamber 17 movable electrode side end 18 fixed electrode side terminal 19 insulation support body

314076.ptd Page 20 563150 Brief description of the diagram 2 0, 2 1 Connection contacts 22 Crimp connection mechanism 23 Operating mechanism 24 Drive rod 25 Electric field relaxation shield 50 Body container 5 0a Opening 51a First busbar compartment 51b Second 2 Busbar compartments 52a, 5 2b Busbar 5 3a Movable contact 53b Fixed contact 54 Bushing 54a Through conductor 55 First ground switch-5 5a Movable contact 55b Fixed contact 55c Conductive housing 55d Operating mechanism 56 Connection conductor 57 Connection section (first terminal) 58 Vacuum circuit breaker 59 Grounding switch 5 9a Movable contact 59b Fixed contact 59c Operating shaft 59d Terminal (second terminal) 59e Conductive housing 6 0a Movable contact 60b Movable contact Point 60d Insulating support 60e Base 60f Operating shaft 6 Og Conductive housing 61 Ground switch 61a Movable contact 61b Fixed contact 61c Operating shaft 61d Conductive housing 62 Cable head connection member 62a Contact 62b Contact rod 62c Operating shaft 62d Conductive Housing 66 switch unit 70 vacuum valve

314076.ptd Page 21 563150 Brief description of the diagram 70a Fixed electrode rod (terminal portion on the fixed electrode side :) 70b Mobile electrode rod (terminal portion on the movable electrode side :) 71 Fixed electrode side terminal 71a Terminal portion 72 Mobile electrode side terminal 72a Flexible conductor connection 73 Flexible conductor 74a Hole 75 ^ 76 Insulating support body 76a Through hole 77 Operating mechanism 78 Operating lever chamber 79 Control lever shaft 79a Control lever 79b Control lever 80 Crimp connection mechanism 80a Shaft 81 Drive member 82 Connection Terminal 83 Connection terminal 84 Shield 85 Bearing 86 Drive shaft 87 Connection

314076.ptd Page 22

Claims (1)

563150 VI. Application for patent scope 1. A gas-insulated electrical switchgear, comprising: a main body container sealed with an insulating gas; a through conductor extending through the upper container wall of the main body container and having an outer end that can be connected to a bus bar; A grounding switch connected to the lower end of the through-conductor to ground the through-conductor to the main body container; a vacuum circuit breaker connected to the lower end of the grounding switch and configured approximately vertically; The lower end is connected, and is generally arranged in a vertical direction, and includes a switch unit of a disconnect switch and a grounding switch; it extends through the upper part of the container wall at the rear of the body container, and the inner end can be connected with the switch unit, and the outer end can be A cable head connected to the cable; and a lightning arrester connected to the upper part of the switch unit, and the device constituting the main circuit of the through conductor to the cable head is arranged in a substantially U shape. 2. A gas-insulated electrical switchgear, comprising: a body container sealed with an insulating gas; a through conductor extending through a container wall above the body container and having an outer end connectable with a bus bar; and a connection with the aforementioned through conductor A grounding switch that grounds the through-conductor to the main body container; is connected to the grounding switch and is generally arranged vertically 314076.ptd page 23 563150 6. Vacuum circuit breaker with patent application scope; the lower end is connected to the lower end of the vacuum circuit breaker and is generally configured as a switch unit in the vertical direction; Extended, and the inner end can be connected with the switch unit, the outer end can be connected with the cable head, and the switch unit has: connected to the lower end of the vacuum circuit breaker, grounding the vacuum circuit breaker to the body container A grounding switch; a disconnect switch that is connected to the lower end of the vacuum circuit breaker and is provided on the upper portion of the ground switch, and is generally arranged in a vertical direction and installed on the container wall at the rear of the body container; and The upper part is connected to ground the disconnect switch to the ground switch of the main body container. 3. The gas-insulated electrical switching device according to item 2 of the scope of patent application, wherein the disconnect switch of the switch unit has a conductive case for electric field mitigation at the movable contact portion and the fixed contact portion, and makes the electric field mitigation conductive The flexible housing is directly coupled to the aforementioned grounding switch. 4. The gas-insulated electrical switch device according to any one of claims 1 to 3, wherein the switch unit is mechanically supported on the rear wall of the main body container only by the cut-off switch, and is transmitted through The terminals are connected in a freely detachable / contactable state and can be pulled forward. 5. The gas-insulated electrical switchgear according to any one of claims 1 to 3, wherein the aforementioned switch unit is the aforementioned disconnect switch is installed on the base, and the ground switch is combined with the disconnect switch Two of 314076.ptd Page 24 563150 VI. The scope of patent application. 6. The gas-insulated electrical switchgear according to any one of claims 1 to 3, wherein the switch unit is a direction of movement of the movable contact of each grounding switch above and below the switch. It is arranged toward the back of the main body container. 7. The gas-insulated electrical switchgear according to any one of the claims 1 to 3, wherein the switch unit is formed with a ground terminal on the lower side toward the front side of the main body container and a lower terminal of the vacuum circuit breaker. Connection section. 8. The gas-insulated electrical switchgear according to any one of claims 1 to 3, wherein the vacuum circuit breaker is mechanically supported on the front wall of the main body container, and is opposed to the ground switch via a terminal. It is connected in a detachable / contactable state and can be pulled out forward. 314076.ptd Page ‘25