JP3402136B2 - Vacuum switch and vacuum switchgear - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum switch and a vacuum switch gear, and more particularly to a vacuum switch and a vacuum switch gear suitable for use in, for example, power receiving and transforming equipment.

[0002]

2. Description of the Related Art In response to the increasing demands of power consumption areas in urban areas, the distribution voltage has been reduced due to the difficulty of locating distribution substations, the lack of space for distribution piping, and the demand for high capacity utilization. The positive boosting, that is, the active absorption of load in a higher voltage system that can increase the capacity per line, leads to the efficient formation of power supply equipment. For this reason, it is necessary to make the distribution equipment and power receiving and transforming equipment even more compact.

As a power receiving and transforming device for downsizing,
For example, the SF described in JP-A-3-273804
₆ Gas insulated switchgear is possible. In this switchgear, a circuit breaker, two disconnecting switches, and a grounding switch are individually manufactured and housed in a unit room and a bus room in which a distribution box is filled with insulating gas. When a vacuum circuit breaker is used as the circuit breaker, the movable electrode is moved up and down with respect to the fixed electrode by an operating device so that the circuit breaker is closed or opened.
As in the vacuum circuit breaker described in Japanese Patent Publication No. 143727,
The movable electrode turns to the left and right around the main shaft as a fulcrum, and contacts and separates from the fixed electrode to turn on and off.

The gas insulated switchgear receives electric power from a power company, for example, by a disconnecting switch and a gas circuit breaker, converts it into an optimum voltage for a load by a transformer, and supplies electric power to a load such as a motor. To maintain and inspect the power receiving and transforming equipment,
After turning off the gas circuit breaker, open the disconnecting switch provided separately from the gas circuit breaker, and ground the grounding switch to allow residual charge and induced current to flow to the ground and prevent re-application from the power supply. And, the worker's safety is protected. If the grounding switch is grounded while the bus bar is charged, an accident may occur, so an interlock is provided between the disconnector and the grounding switch.

For example, the SF ₆ gas insulated switchgear disclosed in Japanese Patent Laid-Open No. 3-273804 has a gas circuit breaker, 2 in a unit room and a bus room in which a distribution box is filled with SF ₆ gas.
Each disconnector and grounding switch are individually manufactured and stored. When a vacuum circuit breaker is used as the circuit breaker, the movable electrode is moved up and down with respect to the fixed electrode by an operating device so that the circuit breaker is turned on and off, or is disclosed in JP-A-55-143727.
In the vacuum circuit breaker described in the publication, the movable lead wire and the movable electrode corresponding to the movable blade are rotated left and right with the main shaft as a fulcrum to come in contact with and separate from the fixed electrode, thereby making and breaking.

[0006]

However, in the latter case, since the movable blade and the movable electrode come into contact with the fixed electrode while energized, the movable blade must be designed in consideration of heat generated when energized, and the mechanical There are problems that strength is taken into consideration, special materials, etc. must be used, and there is a risk that the device will become large or expensive.

An object of the present invention is to provide a small-sized and inexpensive vacuum switch and vacuum switch gear which suppresses heat generated when the drive means for the movable electrode is energized.

[0008]

In the present invention, in order to achieve the above object, a grounded vacuum container, a grounding device, and a fixed member which is arranged to face the grounding device and is electrically connected to a bus bar. An electrode, a movable electrode that rotates between the fixed electrode and the grounding device to come into contact with and separate from the both, drive means for mechanically driving the movable electrode, and a current flows from the movable electrode to the drive means. Insulating means for blocking, and a load-side conductor electrically connected to the movable electrode, in the vacuum container,
The grounding device, the load-side conductor, the bus bar, the fixed electrode, the movable electrode, and the insulating means are housed, and the grounding device, the fixed electrode arranged to face the grounding device, and the movable electrode driven by the driving means, It is characterized in that the load-side conductor electrically connected to the movable electrode is a vacuum switch arranged in a cross shape.

In another embodiment of the present invention, any one of the above-mentioned vacuum switches is housed in a switchboard, and an operating compartment housing an operating mechanism for rotating a movable electrode and a load side conductor are connected. And a conductor compartment accommodating a cable head, wherein the operating compartment is arranged on the depth side of the upper side of the vacuum container, and the conductor compartment is a vacuum switchgear arranged on the front side of the vacuum container. To do.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. The circuit diagram of FIG. 1 shows the entire collective switchgear, and an electric circuit adapted to the structure of the circuit switchgear for one circuit of FIG. 1 is shown in FIG. 2, and the circuit switch for one circuit of FIG. The structure of the gear is shown in FIGS. 3 and 4. The switchgear shown in FIG. 3 is provided with a conductor compartment 18 and an operating compartment 17 in a vacuum switch. In the present invention, the one in which the conductor compartment 18 and the operation compartment 17 are arranged is referred to as a switch gear, and the one without them is simply referred to as a switch. FIG. 5 shows a relay terminal board 27 that connects each phase of the circuit switch with a bus bar.

Multiple circuits, for example switches for three circuits 1, 2, 3
Was placed in a vacuum container 4 which was grounded E. Since the respective circuit switches 1, 2 and 3 have the same configuration, the second circuit switch 2 will be described and the description of the other circuit switch gears will be omitted.
The circuit switch 2 is a set of three phases of the phase switches 2X, 2Y and 2Z. Since the respective phase switches 2X, 2Y, 2Z have the same configuration, only the first-phase phase switch gear 2X will be described, and the description of the other phase switches 2Y, 2Z will be omitted.

The phase switch 2X is a combination of a breaking function, a disconnecting function, a grounding function and a bus bar. That is, the phase switch 2X is mainly composed of the fixed electrode 5 and the movable electrode 7 that moves between the grounding device 6. Fixed electrode 5
Is connected to the internal bus bar 8. The movable electrode 7 is connected to the load side conductor 9, and the load side conductor 9 is connected to the cable head 10 extending outside the vacuum container. The movable electrode 7 is mechanically connected to a movable blade described later, and is rotated in the up-down direction or the left-right direction by the rotation of the movable blade driven by an operation mechanism unit (not shown). When the movable electrode 7 moves from the fixed electrode 5 to the grounding device 6, it stops at the 4 position in FIG. The circuit switch 1 is electrically connected to the system power supply 12 by a power supply side cable 11 connected to the movable electrode 7.

That is, as the movable electrode 7 rotates,
The movable electrode 7 is energized at the closing position Y1 where it contacts the fixed electrode 5, and is rotated below the closing position Y1 to separate the movable electrode 7 from the fixed electrode 5 at the cutoff position Y2 to cut off the current. Further, the movable electrode 7 is further rotated downward at the disconnection position Y3 to separate from the fixed electrode 5, and the insulation distance is maintained so that the worker is not electrocuted on the load conductor side and does not cause dielectric breakdown due to lightning or the like. Further, the movable electrode 7 rotates further downward so that the movable electrode 7 comes into contact with the grounding device 6 at the grounding position Y4. Even if the disconnecting position Y3 is omitted and the disconnecting position Y2 is moved to the ground contacting position Y4, the effect of the present invention is not impaired.

While the movable electrode 7 is rotated from the fixed electrode 5 to the grounding device 6 in a vacuum, which is a high insulator, it is possible to continuously have four positions or functions by one operation. Easy and easy to use. Further, since the movable electrode 7, the fixed electrode 5, and the grounding device 6 are integrated in one place, the size can be further reduced as compared with the above-mentioned conventional technique. When the disconnection position Y3 is further provided, in the case of different power supply matching, for example, two-line power reception with two system power supplies, the phase switch gear 2X of any one line is in operation at the closing position Y1 and the phase 2X of the other line is in the disconnection position. It is safe for a worker to come into contact with the load-side conductor 9 of this circuit when waiting at Y3. Even when switching from standby to operation or from operation to standby, continuous operation is possible, so the work speed is fast and the operation is easy.

Further, by detecting the energizing current with the current transformer 13, the protection relay 14 is operated and the operation mechanism section (not shown) is tripped, thereby dealing with a system accident.
As the vacuum container 4 which is grounded E, a stainless member is used, and a part of the stainless member is formed into a spherical or curved shape.
In order to increase the mechanical strength of the, the thickness of the vacuum vessel wall is reduced to reduce the weight. The vacuum container 4 is housed in the switchboard 16. The switchboard 16 has an operation compartment 17 and a conductor compartment 18 on the upper side and the lower side of the vacuum container 4. The operation compartment 17 is arranged on the right side of the vacuum container 4, that is, on the depth side and is recessed, and an openable door 19 is attached to the front side. The conductor compartment 18 is arranged on the left side of the vacuum container 4, that is, on the front side.

The operating compartment 17 and the conductor compartment 18 are arranged obliquely symmetrically with respect to each other via the vacuum container 4. The operation compartment 17 accommodates an operation mechanism portion for rotating the movable blade and the movable electrode 17. The conductor compartment 18 houses the load-side conductor 9 and the cable head 10. A tool or the like for maintenance and inspection of the inside of the operation compartment can be placed on the vacuum container on the front side of the operation compartment 17, and the maintenance and inspection is easy. Further, the conductor compartment 18 is arranged on the front side of the operation compartment 17 in front of the operation compartment 17, so that the work of attaching the cable head 10 can be performed safely.

Nine bushings 21 are attached to the front wall of the vacuum container. In the first circuit switch 1,
One side of the three-phase power supply side cable 11 has a bushing 21.
Through and is connected to the external system power supply 12. Also in the second and third circuit switches 2 and 3, the one-side load-side conductor 9 of each of the three phases passes through the bushing 21 and the cable head 1
Connected to 0. When connecting, the cable head 10 provided on the load-side conductor 9 is inserted. A flexible conductor 22 is used as the load-side conductor 9 in the bushing 21 and is connected to a load such as a transformer or a motor. A current transformer 13 is provided in each phase of the cable head 10 of the second circuit switch 2 as shown in FIG. Other circuit switch 1,
3, a current transformer 13 is also provided as required under load conditions.

The grounding device 6 corresponds to nine cable heads, is arranged on the upper part of the cable head, and connects the common grounding conductor 24 with the grounding conductor 38. Both ends of the common ground conductor 24 are fixed to the switchboard 16 with ground screws 25. All of these cable heads 10, ground conductors 38, and current transformers 13 can be viewed from the front side to prevent forgetting to attach them, and to make the attachment / detachment work easier for the worker.
We are working to improve work efficiency.

In FIG. 1, the internal bus bar 8 directly connects between the switches for each of the three circuits, but the circuit switch gears are directly connected for easy understanding of the embodiment. FIG. 1 shows the relay terminal board 27. A relay terminal plate 27 having a relay terminal 26 formed by a part of the nine fixed electrodes 5 in FIG. 5 is attached to the inner wall surface of the vacuum container, and each relay terminal 26 is connected to each internal bus bar 8 described above. When arranging each internal bus bar 8 on the relay terminal board 27, it goes from the first circuit switch to the second circuit in order from the left side to the right side of the relay terminal board 27.
The internal busbar 8 of the third circuit switchgear is arranged. When arranging, the internal bus bar 8 of each circuit switch is
X, 2X, 3X on one side, and the second and third phases 2X-2
Z and 3X to 3Z are arranged while being wrapped on the other side to facilitate wiring. In addition, in order to prevent wiring mistakes, measures such as prevention of thermal deterioration are taken by disposing the internal buses.

The first to third circuit switches 1 to 3 are arranged in a vacuum container grounded to E and have the following structure. Since each phase switch 2X to 2Z has the same configuration,
Only the configuration of the phase switch 2X for one phase will be described, and description of the other phase switches 2Y and 2Z will be omitted. Inside the vacuum container 4 which is grounded E, a movable electrode 7 which rotates between a grounding device 6 and a fixed electrode 5 which is arranged correspondingly is arranged, and a cable head 10 is arranged correspondingly to the movable electrode 7. , These are arranged in a cross shape as a whole. The grounding device 6, the movable blade 30, and the load-side conductor 9 penetrating three through holes (not shown) formed in the vacuum container 4 are extended outside the vacuum container.

The grounding device 6 is provided with a grounding side bottom metal fitting 31 on one end side, and has a grounding side bushing 32 made of a ceramic material which is open on the other end side. A flange 33 is provided on the outer circumference of the grounding side bushing 32, and a grounding side metal fitting 34 attached to the flange 33 is welded to the vacuum container 4. A grounding side bellows 35, a spring 36 and a grounding side conductor 37 are arranged in the grounding side bushing. The ground-side conductor 37 extends through the ground-side bottom metal fitting 31 to the outside, and the end of the ground-side conductor 37 is connected to the common ground conductor 24 by the screw. The ground conductor 38 is composed of a flexible conductor,
Even when the ground side conductor 37 moves, it can be electrically connected.
In addition, the ground electrode 39 is provided on the ground side conductor 37 on the opposite side.
Is fixed. When the ground electrode 39 is pushed toward the ground-side bottom metal fitting, the spring 36 is contracted together with the ground-side bellows 35. At that time, the spring 36 constantly presses the ground electrode 39 toward the movable electrode 7 due to the contracted force.

The fixed electrode 5 corresponding to the grounding device 6 is connected to the three-phase internal bus bar 8. The three-phase internal busbar 8 is shown in FIG.
It is arranged as shown in. The fixed electrode 5 and the relay terminal 26 are supported by a fixed insulating cylinder 42 made of a ceramic material via a fixed relay metal fitting 41. Fixed insulation tube 42
The fixed support fitting 43 that supports the other end of is fixed to the vacuum container by a brazing material. That is, the fixed relay metal fitting 41 and the fixed support metal fitting 43 are previously attached to both ends of the fixed insulating cylinder 42.

The movable electrode 7 is arranged between the grounding device 6 and the fixed electrode 5, and the movable electrode 7 is supported by a movable insulating cylinder 45 made of a ceramic material via a movable relay metal fitting 44. One end is supported by the movable support fitting 46 in the same manner as described above, and the movable support fitting 46 is supported by the movable blade 30. The movable blade 30 penetrates the movable support plate 47 and extends to the outside. The movable support plate 47 is fixed to the vacuum container 4. The movable blade 30 is a movable bellows 48 that is expandable and contractible.
One end of the movable bellows 48 is surrounded by
6, the other end is attached to the movable support plate 47, respectively, and the movable blade 30 can move to the left and right and up and down.
The movable blade 30 rotates in the direction of the arrow with the main shaft 49 as a fulcrum, and comes into contact with and separates from the grounding device 6 and the fixed electrode 5.

The tip of the movable blade 30 is rotated about the main shaft 49 as a fulcrum by driving an operation mechanism portion (not shown) connected to the tip of the movable blade 30. The operation shaft 50 connects the movable blade 30 and the operation mechanism section. It should be noted that the movable blade 30 may have a structure in which a movable electrode is simply provided at the tip thereof. In this case, an insulating means for interrupting the voltage is required in any one of the movable blade and the operation mechanism section.

The tip of the movable electrode 7 and the load-side conductor 9 are connected by a flexible conductor 22. The load-side conductor 9 penetrates the load-side bushing 21 made of a ceramic material and is connected to the cable head 10. A load-side sealing metal fitting 53 is provided at the end of the load-side bushing 21, and the load-side sealing metal fitting 53 is provided.
Is welded to and supported by a brazing material around the opening formed in the vacuum container 4. In addition, the outside of the vacuum container 4 and the cable head 10
The ground side metal layer 54 is provided on the ceramic surface of the load side bushing 21 exposed between the gaps so that the leakage current flows to the ground E through the vacuum container 4, and even if the worker comes into contact with the periphery of the cable head 10. Safety measures are taken to prevent danger.

Next, the operation of the phase switch will be described with reference to FIGS. The movable electrode 7 is located between the grounding device 6 and the fixed electrode 5 as shown in FIG. 6 at the cutoff position Y2 and the disconnection position Y3 from which the movable electrode 7 is rotated in the arrow direction X1. As shown in FIG. 7, the position where the movable electrode 7 contacts the ground electrode 39 is the ground position Y4, and the ground electrode 39 is constantly pressed by the spring 36 toward the movable electrode. Further, the movable electrode 7 rotates in the arrow direction X2, and the movable electrode 7 is in contact with the fixed electrode 5 as shown in FIG.
The place where the load-side conductor 9 is also connected is the closing position Y1.

At the loading position Y1, the movable electrode 7 is the fixed electrode 5.
And is connected to the load-side conductor 9. In this case, unlike the prior art, electric power is supplied from the movable electrode 7 to the load-side conductor 9 via the fixed electrode 5 and the flexible conductor 22 without passing through the movable blade 30,
The current path can be significantly reduced compared to that of the prior art.
Further, the electric resistance is reduced, and the power loss and the generated heat can be reduced.

On the other hand, at the closing position Y1, electric power is constantly supplied to the load, and this operating time is longer than the operating time at other positions, and if the flexible conductor 22 is not used, the movable electrode 7 is directly on the load side. Sliding contact with the conductor 9 is conceivable. The movable electrode 7 is brought into direct sliding contact with the load-side conductor 9,
If current continues to flow in a state where the movable electrode 7 and the load-side conductor 9 are in contact with each other, the movable electrode 7 and the load-side conductor 9 are easily welded to each other due to the generated heat in the vacuum inside the vacuum container 4. In order to separate the welded movable electrode 7 and the load-side conductor 9 from each other, if the turning force of the operating mechanism is increased, it can be used at a minimum, but the operating mechanism cannot be increased in size. The circuit breaker becomes large and costly. Also, sliding under the generated heat causes the flexible conductor to be abraded and its life to be shortened. Further, when the movable electrode 7 slides on the load-side conductor 9, the fine metal particles generated from the movable electrode 7 and the load-side conductor 9 diffuse and remain in the vacuum container, which easily causes dielectric breakdown.

On the other hand, in the present invention, the movable electrode 7 is connected between the load-side conductor 9 and the movable electrode 7 by the flexible conductor 22 which does not directly slide on the load-side conductor 9. The welding of the side conductor 9 does not occur. The turning force of the operating mechanism does not become larger than that described above, and the operating mechanism can be downsized. Movable electrode 7 and load-side conductor 9
Has a longer life than the above, which is economically advantageous. Further, the flexible conductor 22 connects between the load-side conductor 9 and the movable electrode 7, and as described above, there is no generation of metal fine particles when the movable electrode 7 slides on the load-side conductor 9,
The insulation performance is significantly improved from the above. Therefore, the vacuum container 4 can be downsized. Further, the present invention can be used even if the grounding device and the disconnecting position are removed, and when removed, the vacuum container and the operating mechanism can be further downsized, so that the circuit switch can naturally be downsized.

Further, unlike the prior art, a movable insulating cylinder 45 made of an insulating ceramic material is provided between the movable electrode 7 and the movable blade 30 arranged between the grounding device 6 and the fixed electrode 5, and No current flows into the movable blade 30 from the fixed electrode 5. Even if the movable blade 30 is driven to strongly contact the movable electrode 7 with the fixed electrode 5, the movable blade 30
Does not require a design considering the heat generated by the current. For this reason, unlike the prior art, since mechanical strength and a special material in consideration of heat generated by current are not required, the movable electrode 7, the movable blade 30, and the operation mechanism section can be made small by this amount.
It can be manufactured at low cost. Although the movable insulating cylinder 45 is made of an insulating ceramic material, any other insulating member can be used as long as it is an insulating member that can withstand the high temperature in the vacuum grounding container. Further, the movable insulating cylinder 45 according to the present invention is in a vacuum which is a highly insulating medium in the vacuum container 4. Conventionally, outside the vacuum insulation, that is, outside the vacuum container 4, another insulation medium structure such as air or SF ₆ gas insulation had to be added, and the overall structure was complicated.
The movable insulating cylinder 45 also had to be enlarged. The present invention can also solve this problem.

Next, another embodiment will be described with reference to FIGS. The load-side common conductor 56 is attached to the grounded vacuum container 4, the load-side common conductor 56 is connected to the load-side conductor 9, and the ground-side contact 57 and the load-side contact 58 are mounted thereon. The ground movable electrode 59 and the movable electrode 7 supported by the vacuum container 4 are arranged corresponding to the ground side contact 57 and the load side contact 58. When the movable electrode 7 is in contact with the load-side contact 58, the ground movable electrode 59 is separated from the ground-side contact 57 and operates in the opposite directions.
The fixed electrode 5 and the ground-side conductor 37 connected to the busbars 8 of multiple phases are arranged outside both electrodes, and between the fixed electrode 5 and the movable electrode 7, and between the ground-side conductor 37 and the ground movable electrode 59. Are connected by a flexible conductor 22.

That is, in a closed state where the movable electrode 7 and the load side contact 58 are in contact with each other, the movable electrode 7 is moved upward from the load side contact 58, and at the same time, the ground movable electrode 59 is moved downward to move the ground side contact 57. It comes into contact with the ground and becomes grounded. Also,
The former changes from the closed state to the closed state. In this embodiment, the fixed electrode 5 connected to the busbars 8 of a plurality of phases is arranged in the direction perpendicular to the movable electrode 7 and the load side contact 58, that is, in the lateral direction, and the fixed electrode 5 and the movable electrode 7 are grounded and grounded. Side conductor 37
It can also be used for a switchgear in which the flexible conductor 22 connects between the ground movable electrode 59 and the ground movable electrode 59. Further, since the movable insulating cylinder 45 made of an insulating ceramic material is provided between the movable electrode 7 and the movable blade 30 which are arranged between the grounding device 6 and the fixed electrode 5, the movable blade 30 is separated from the fixed electrode 5 by the movable insulating cylinder 45. Since the current does not flow and the movable blade 30 does not need to be designed in consideration of the heat generated by the current, unlike the prior art, it does not require mechanical strength and a special material in consideration of the heat generated by the current. 7, the movable blade 30, and the operating mechanism can be manufactured in a small size at low cost.

[0033]

As described above, according to the vacuum switch and the vacuum switch gear of the present invention, the insulating means is provided between the movable electrode and its driving means, or between the fixed electrode and the vacuum container. The distance can be shortened and the vacuum container can be miniaturized.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a collective switchgear that is an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a configuration of the circuit switchgear of FIG.

FIG. 3 is a side sectional view showing the configuration of the circuit switch gear used in FIG.

FIG. 4 is a front view of FIG. 2 seen from the left side.

5 is a plan view of the busbar connecting terminal plate shown in FIGS. 1 and 3. FIG.

FIG. 6 is a side sectional view of the circuit switchgear shown in FIG. 3 at a cutoff and disconnection position.

7 is a side sectional view of the circuit switch gear shown in FIG. 3 at a grounding position.

8 is a side sectional view of the circuit switch gear shown in FIG. 3 at a closing position.

FIG. 9 is a side sectional view showing the configuration of a circuit switchgear that is another embodiment of the present invention.

FIG. 10 is a side sectional view showing a grounded state of the circuit switch gear of FIG.

[Explanation of symbols]

1 to 3 ... Circuit switch, 2X, 2Y ... Phase switch, 4 ...
Vacuum container, 5 ... Fixed electrode, 6 ... Grounding device, 7 ... Movable electrode, 8 ... Internal bus bar, 9 ... Load side conductor, 11 ... Power source side cable, 22 ... Flexible conductor, 30 ... Movable blade.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI H02B 13/04 M (72) Inventor Sozo Shibata 1-1-1 Kokubuncho, Hitachi City, Ibaraki Hitachi Kokubun Factory, Ltd. (56) References JP-A-9-153320 (JP, A) JP-A-63-200425 (JP, A) JP-A-8-306269 (JP, A) JP-A-8-336214 (JP, A) JP-B-49-41903 (JP, B1) JP-B-51-5189 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02B 13 / 02,13 / 075 H01H 33/66 , 33/42 H01H 31/28-31/30

Claims (6)

(57) [Claims] 1. A grounding device, a fixed electrode that is arranged to face the grounding device, and is electrically connected to a bus bar, and a circuit between the fixed electrode and the grounding device. A movable electrode that moves to contact and separate from each other; a driving unit that mechanically drives the movable electrode; an insulating unit that blocks a current from flowing from the movable electrode to the driving unit; A load side conductor connected, in the vacuum vessel,
The grounding device, the load-side conductor, the bus bar, the fixed electrode, the movable electrode, and the insulating means are housed, and the grounding device, the fixed electrode arranged to face the grounding device, and the movable electrode driven by the driving means, A vacuum switch, wherein load-side conductors electrically connected to the movable electrode via a flexible conductor are arranged in a cross shape. 2. The vacuum switch according to claim 1, wherein a blocking and disconnecting position is set while the movable electrode moves from a closing position where it contacts the fixed electrode to a grounding position where it contacts the grounding device. 3. The vacuum switch according to claim 1, wherein the vacuum container is made of a stainless steel member. 4. The vacuum switch according to claim 1, wherein the load-side conductor is attached to the vacuum container via a bushing of a ceramic member. 5. The vacuum switch according to claim 1, wherein the insulating means is an insulating ceramic. 6. A vacuum switch according to any one of claims 1 to 5 is housed in a switchboard and connected to an operation compartment housing an operation mechanism section for driving the movable electrode, and the load-side conductor. A vacuum switchgear comprising a conductor compartment accommodating the cable head, wherein the operating compartment is arranged on a depth side on an upper side of the vacuum container, and the conductor compartment is arranged on a front side of the vacuum container.