KR19990036805A - Switch gear - Google Patents

Abstract

The vacuum circuit breaker of the present invention efficiently extinguishes an arc generated when the movable electrode rotates from side to side with the main shaft as a supporting point, and is inserted into and interrupted from the fixed electrode. For this purpose, both electrodes have an outer circumferential end of each groove of the corresponding electrode surface. It has a ring-shaped running surface formed on the electrode surface, and both electrodes sequentially narrow the corresponding gap width toward the movable blade side. As a result, the arc can be magnetically driven along the running surface, and the arc can be efficiently extinguished to improve the electrode breaking performance.

Description

Switch gear

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum switch gear, and more particularly, to an arrangement structure of a novel switch gear in which any one or two or more of a breaker, a disconnector, a load switch, and a grounding device are assembled.

In response to the increasing demand in the power consumption areas of the metropolitan area, the distribution substation for 6KV supply, the lack of layout of distribution pipes, and the increase of the 6KV supply facility operation rate, etc. Actively absorbing loads with this large 22KV system leads to efficient power supply facilities. For this purpose, it is necessary to compact the 6KV level of the 22KV distributor.

As the water-switched electric machine that can be made compact, for example, the SF ₆ gas insulated switchgear described in JP-A-3-273804 can be considered. The switchgear is manufactured by separately storing breakers, two disconnectors, and a grounding switch in a unit chamber and a mother chamber filled with insulation gas in a distribution box. 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 the operation of the vacuum circuit breaker, and the vacuum circuit breaker described in Japanese Patent Laid-Open No. 55-143727 is operated with the main shaft as a support point. The electrodes rotate left and right to come out of contact with the fixed electrode to be inserted and blocked.

For example, a gas insulated switchgear receives electric power from a power company with a disconnector and a gas circuit breaker, converts the electric power into a voltage most suitable for a load, and supplies electric power to a load such as a motor. To repair and check the water transformer, turn off the gas circuit breaker, open the disconnector separately installed from the gas circuit breaker, and ground the ground switch to supply residual load and induction current on the power supply side to ground, Preventing authorization keeps workers safe. In addition, if the ground switch is grounded while the bus is charged, an accident is connected. Therefore, an interlock is provided between the disconnector and the ground switch.

For example, the SF ₆ gas insulated switchgear disclosed in Japanese Patent Laid-Open No. 3-273804 is manufactured by separately separating a gas circuit breaker, two disconnectors, and a ground switch in a unit chamber and a bus chamber in which a SF ₆ gas is charged in a distribution box. I receive it. When using a vacuum circuit breaker as the circuit breaker, the movable electrode in the vacuum chamber moves up and down with respect to the fixed electrode by a manipulator, and is turned on or off, or the vacuum circuit breaker described in Japanese Patent Laid-Open No. 55-143727 is operated with the main shaft as a support point. The movable lead wires corresponding to the blades and the movable electrodes in the vacuum vessel are rotated from side to side to be in contact with and fixed to the fixed electrodes.

However, in the latter case, no consideration is given to the efficient arc extinguishing of the arc generated when the movable electrode comes into contact with and detaches from the fixed electrode.

SUMMARY OF THE INVENTION An object of the present invention is to provide a switchgear having a miniaturized vacuum ground container by efficiently extinguishing arcs generated when the movable electrode rotates to the fixed electrode and is detached from contact with the main shaft as a support point.

1 is a circuit diagram of a collective switchgear which is an embodiment of the present invention;

FIG. 2 is a circuit diagram showing the configuration of a circuit switch gear used in FIG. 1; FIG.

3 is a side sectional view showing a configuration of a circuit switch gear used in FIG. 1;

4 is a front view of FIG. 3 viewed from the left side;

5 is a plan view of the bus bar connection terminal block shown in FIGS. 1 and 3;

6 is a side cross-sectional view of the circuit switch gear shown in FIG. 3 in a no-load state;

7 is a side cross-sectional view showing a ground state of the circuit switch gear of FIG. 3;

8 is a side sectional view showing a closing state of the circuit switch gear of FIG. 3;

9 is a plan view of the movable electrode used as the circuit switch gear shown in FIG.

10 is a side cross-sectional view of the movable electrode used as the circuit switch gear shown in FIG. 9;

Fig. 11 is a side sectional view showing the construction of a circuit switch gear which is another embodiment of the present invention.

※ Explanation of symbols for main parts of drawing

1 to 3: 3 circuit switchgear 2X to 2Y: phase switch gear

4: vacuum grounding container 5: fixed electrode

6 earthing electrode 7 movable electrode

7A: Spiral Groove 7B: Driving Surface

8: power side conductor 9: load side conductor

11 power supply cable 22 flexible conductor

30: movable blade

The switch gear according to claim 1 of the present invention is a movable electrode extending out of the vacuum ground container which rotates the movable electrode through a fixed electrode disposed in the vacuum ground air and a movable electrode which is in contact with and disconnected from the ground electrode, and a support point connected to the movable electrode. A plurality of grooves formed on a corresponding electrode surface of the fixed electrode and the movable electrode, each having a blade and a conductor extending out of the vacuum ground container connected through the movable electrode and the electrical means; It is provided with the ring-shaped running surface formed in the electrode surface, and the gap width corresponding to a fixed electrode and a movable electrode is narrowed in order toward the movable blade side from the opposite side to the movable blade side.

The switch gear of the second aspect of the present invention is the claim 1 having a conductor extending out of the vacuum ground container which is connected to the movable electrode and the fixed electrode via an electrical means.

A switch gear according to claim 3 of the present invention is the claim 1 comprising a current blocking means in a part of the movable electrode and the movable blade.

The switch gear of Claim 4 of this invention is a Claim 1 which used the flexible conductor for the said electrical means.

A switch gear according to claim 5 of the present invention is the claim 1 in which a cable head is connected to a conductor extending out of a vacuum ground container which is connected to the movable electrode via an electrical means.

The switch gear of Claim 6 of this invention is a Claim 1 which connected the power supply side bus | wire to the conductor extended out of the vacuum ground container which connects the said fixed electrode via electrical means.

The switchgear of the seventh aspect of the present invention is the claim 1 having a disconnection position between an input position of the movable electrode and a fixed electrode to a ground position of the ground electrode and the ground.

A switchgear according to the eighth aspect of the present invention is a vacuum grounding vessel such that the volume of the vacuum grounding container on the fixed electrode side is wider than the volume of the vacuum grounding container on the ground electrode side from the center of the movable electrode located at the center of the ground electrode and the fixed electrode. Claim 1 which comprises the.

In the switch gear of the ninth aspect of the present invention, when the distance from the center of the movable electrode located at the center of the ground electrode and the fixed electrode to the vacuum ground vessel on the fixed electrode side and the ground electrode side is L1 and L2, L1> It is in Claim 1 which comprised the vacuum ground container so that it might become L2.

The switch gear of the tenth aspect of the present invention comprises a movable electrode which comes out of contact with a fixed electrode disposed in the vacuum ground container, and a movable blade which extends out of the vacuum ground container for rotating the movable electrode via a support point connected to the movable electrode. The plurality of grooves are formed in the corresponding electrode surface, and the two electrodes gradually narrow the corresponding gap width toward the movable blade side from the opposite side of the movable blade side.

The switch gear of claim 11 of the present invention comprises a movable electrode extending out of contact with a fixed electrode disposed in the vacuum ground container, a movable blade extending out of the vacuum ground container for rotating the movable electrode via a support point connected to the movable electrode; A plurality of grooves formed on the corresponding electrode surface of the two electrodes and a gap width narrowed sequentially from the opposite side of the movable blade side toward the movable blade side, the gap width being the position of the support point or the position of the movable electrode and the movable blade; This is to adjust the length of the current blocking means installed in a part.

The switchgear of the twelfth aspect of the present invention is the tenth or eleventh aspect of the present invention, wherein the switch gear has a ring-shaped running surface on an electrode surface at an outer circumferential end of each of the grooves.

The switch gear according to claim 13 of the present invention resides in the switch gear according to any one of claims 1 to 12, wherein the groove has a spiral shape.

The switch gear according to claim 14 of the present invention is characterized in that a conductor extending out of the vacuum ground container for connecting the movable electrode and the fixed electrode of the switch gear via an electrical means is connected to the cable head and the power bus side of the switchboard load side. It is in the switchgear of any one of Claims 1, 10, and 11.

The switchgear according to claim 15 of the present invention is used in any one or two or more of the switchgear of the circuit breaker, disconnector, load switch, and grounding device. It is in the switch gear of the description.

The switch gear according to claim 16 of the present invention resides in the switch gear according to any one of claims 1, 10 and 11, wherein a sealed container having an insulating medium is used instead of the vacuum ground container.

(Example)

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 5. The circuit diagram of FIG. 1 shows the whole of a collective type switchgear, and when it shows the electrical circuit which matched the structure of the circuit switchgear for one circuit of FIG. 1, it becomes FIG. 2, and the structure of the circuit switchgear for one circuit of FIG. 3 and 4 are shown. 5 is a relay terminal board 27 for connecting each phase of the circuit switch gear with a bus bar.

For example, three three-circuit switch gears 1, 2, and 3 are arranged in a grounded (E) vacuum ground container (4). Since each of the three-circuit switch gears 1, 2, and 3 has the same configuration, the second three-circuit switch gear 2 is described, and description of the other circuit switch gear is omitted. The circuit switch gear 2 aggregates three phases of phase switch gear 2X, 2Y, 2Z. Since each phase switch gear 2X, 2Y, 2Z has the same structure, only the phase switch gear 2X of a 1st phase is demonstrated, and description of other phase switch gear 2Y, 2Z is abbreviate | omitted.

The phase switch gear 2X is a collection of the breaking function, the disconnecting function, the grounding function, and the bus bar. That is, the phase switch gear 2X mainly consists of the movable electrode 7 which moves between the fixed electrode 5 and the ground electrode 6. As shown in FIG. The fixed electrode 5 is connected to the power supply side conductor 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 out of the vacuum ground container. In addition, the movable electrode 7 is mechanically connected to the movable blade described later, and rotates in the vertical direction or the horizontal direction by the rotation of the movable blade driven by the operation mechanism not shown. When the movable electrode 7 moves from the fixed electrode 5 to the ground electrode 6, it stops at 4 positions in FIG.

The three-switch switchgear 1 is electrically connected to the system power supply 12 by a power supply side cable 11 connected to the movable electrode 7.

In other words, as the movable electrode 7 rotates, the movable electrode 7 is energized at the injection position Y1 which contacts the fixed electrode 5, and rotates downward at the injection position Y1 to the blocking position Y2. The movable electrode 7 is separated from the fixed electrode 5 to cut off the current. In addition, the movable electrode 7 is separated from the fixed electrode 5 at the disconnected position Y3 by the downward rotation so as not to break down by lightning or the like, and to take an insulating distance from which the worker does not electric shock on the load conductor side. Further, the movable electrode 7 is rotated downward so that the movable electrode 7 is in contact with the ground electrode 6 at the ground position Y4. The omission of the disconnection position Y3 does not impair the following effects of the present invention even when the disconnection position Y3 is moved from the blocking position Y2 to the ground position Y4.

Since the movable electrode 7 can continuously perform four positions in a single operation while the movable electrode 7 rotates from the fixed electrode 5 to the ground electrode 6 in a vacuum, which is a high insulator, the operation is easy and the convenience is good. Moreover, since the movable electrode 7, the fixed electrode 5, and the ground electrode 6 are gathered in one place, the size of the movable electrode 7, the fixed electrode 5, and the ground electrode 6 can be reduced. In addition, when the disconnection position Y3 is provided, in the two-line power receiving unit, for example, two system power sources, the phase switch gear 2X of one line is operating at the closing position Y1, and the other When the phase switch gear 2Y of the line is in standby in the disconnection position Y3, it is not only safe for the worker to come into contact with the load-side conductor 9, but also continuously in the operation or switching from standby to standby. Because work is possible, work speed is fast and operation is easy.

In addition, the current is detected by the current transformer 13 and the protection relay 14 is operated to trip the operation mechanism (not shown) to cope with system accidents.

The grounded (E) vacuum grounding container (4) uses a stainless member, a part of which is formed into a spherical or curved shape, and the mechanical strength of the vacuum grounding container (4) is increased, or the thickness of the wall of the vacuum grounding container is increased. The thickness is reduced and the weight is reduced. The vacuum ground container 4 is housed in the switchboard 16. The switchboard 16 is provided with the operation compartment 17 and the conductor compartment 18 on the upper side and the lower side of the vacuum ground container 4. The operation compartment 17 is concavely arranged on the right side of the vacuum ground container 4, that is, the depth side, and the front door side is provided with a door 19 that is free to open and close. Moreover, the conductor compartment 17 is arrange | positioned at the left side of the vacuum ground container 4, just in front.

Obliquely symmetrically arrange | position the operating compartment 17 and the conductor compartment 18 through the vacuum ground container 4. The operation compartment 17 houses an operation mechanism portion for rotating the movable blade and the movable electrode 7. The conductor compartment 18 houses the load side conductor 9 and the cable head 10. A maintenance tool can be placed on the vacuum container immediately in front of the operation compartment 17 so as to place a tool for maintenance inspection in the operation compartment. Moreover, the conductor compartment 18 is arrange | positioned at the front side immediately before the operation compartment 17, and the installation work of the cable head 10 can be performed safely.

The wall on the front side of the vacuum ground container 4 is provided with nine bushings 21. In the first circuit switchgear 1, one of the three-phase power supply side cables 11 passes through the bushing 21 and is connected to an external system power supply 12. Also in the 2nd and 3rd switch circuits 2 and 3, one load side conductor 9 of each of three phases penetrates through the bushing 21, and is connected to the cable head 10. FIG. When connecting, load side conductor 9 is inserted into the connector provided in the cable head 10, and is performed. The load-side conductor 9 in the cable head uses the flexible conductor 22 and is connected to a load such as a transformer TR, another circuit, a motor, or the like. On each of the cable heads 10 of the second circuit switch gear 2, as shown in FIG. 4, a current transformer 13 is provided and penetrated. The current transformer 13 connected to the other circuit switch gear 2 is provided as needed, such as a load condition.

The ground electrode 6 corresponds to the nine cable heads 10 and is disposed thereon and connects the common ground conductor 24 to the ground conductor 38. Both ends of the common ground conductor 24 are fixed to the switchboard 16 by a ground screw 25. These cable heads 10, grounding conductors 38, and current transformers 13 are all visible from the front side to prevent forgetting to install, and to facilitate the installation and removal work for the worker to improve work efficiency. have.

In each of the three circuit switch gears, the power supply conductor 8 directly connects the circuit switch gears in FIG. 1, but this is a direct connection between the circuit switch gears for easy understanding of the embodiment. As shown in FIG. 5, the relay terminal 27 of FIG. 1 supports nine fixed electrodes 5 and is provided on the inner wall of the vacuum vessel. When arranging the power supply-side conductors 8 on the relay terminal board 27, the power-side conductors of the second and third circuit switch gears are sequentially turned from the first circuit switch gear as the relay terminal board 27 is moved from left to right. 8) Place. In the arrangement, the power supply-side conductor 8 of each circuit switchgear has fixed electrodes 5 of one phase (1X, 2X, 3X) on one side and fixed electrodes of two phases and three phases (1Y-3Y, 1Z-3Z). 5) is laid on the other side to facilitate wiring, and measures such as prevention of heat deterioration are prevented by preventing wiring errors and distributing internal busbars.

The first to third three-switch switch gears 1 to 3 are arranged in a vacuum ground container and have the following configuration, but each phase switch gear 2X to 2Z has the same configuration, so that the phase of one phase The structure of only the switch gear 2X is shown in FIG. 6, and description of other phase switch gear 2Y, 2Z is abbreviate | omitted. The inside of the vacuum ground container 4 is arranged with a movable electrode 7 which rotates between the ground electrode 6 and the fixed electrode 5 disposed corresponding to the ground electrode 6, and the cable head 10 is provided on the movable electrode 7. Are arranged correspondingly, and these are arranged in a cross shape as a whole. The ground electrode 6, the movable blade 30, and the load-side conductor 9, which penetrate three through holes (not shown) formed in the vacuum ground container 4, extend out of the vacuum ground container.

The ground electrode 6 is provided with a ground side bottom metal body 31 at one end, and has a ground side bushing 32 made of a ceramic material having the other end opened, and the outer periphery of the ground side bushing 32. The flange 33 is provided, and the ground side sealing metal body 34 provided on the flange 33 is welded to the vacuum ground container 4. A ground side bellows 35, a spring 36 and a ground side conductor 37 are disposed in the ground side bushing. The ground-side conductor 37 extends through the ground-side bottom metal body 31 to the outside, and its end portion is connected to the common ground conductor 24 by the ground conductor 38 by a screw. The ground conductor 38 is composed of a flexible conductor and is electrically connected even when the ground-side conductor 37 is moved.

The ground electrode 39 is fixed to the ground-side conductor 37 on the opposite side. When the ground electrode 39 is pressed toward the ground bottom metal body, the spring 36 also contracts together with the ground-side bellows 35, but the spring 36 always moves the ground electrode 39 to the movable electrode direction by the contracting force. It is pressed. In addition, although the grounding conductor 37 and the grounding electrode 39 are distinguished from each other, the grounding electrode may be referred to as integral.

The fixed electrode 5 corresponding to the ground electrode 6 is connected to the three-phase power source side conductor 8. The three-phase power supply side conductors 8 are arranged as shown in FIG. The fixed electrode 5 is supported by the fixed insulating cylinder 42 made of a ceramic material via the fixed relay metal body 41. The fixed supporting metal body 43 supporting the other end of the fixed insulating cylinder 42 is fixed to the vacuum ground container by the solder material. That is, the fixed relay metal body 41 and the fixed support metal body 43 are provided in advance at both ends of the fixed insulation cylinder 42. In the case of a phase switchgear for one phase, the power supply side bus bar may be directly connected to the fixed electrode 5 without using the power supply side conductor 8 as the relay terminal board 27.

The movable electrode 7 is disposed between the ground electrode 6 and the fixed electrode 5, and supports the movable electrode 7 to the movable insulating cylinder 45 made of ceramic material via the movable relay metal 44. One end of the movable support portion 45 is supported by the movable support metal body 46 as described above, and the movable support metal body 46 is supported by the movable blade 30. The movable blade 30 passes through the movable support plate 47 and extends to the outside. The movable support plate 47 is fixed to the vacuum grounding container 4. The movable blade 30 is surrounded by a freely movable movable bellows 48, one end of the movable bellows 48 is installed on the movable support metal body 46, and the other end is mounted on the movable support plate 47, respectively. The movable blade 30 is allowed to move 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 supporting point, and leaves the ground electrode 39 and the fixed electrode 5 in contact with each other.

The front end of the movable blade 30 is driven by the operation mechanism shown in the figure, which is connected, and the movable blade 30 rotates with the main shaft 49 as a supporting point. The operation shaft 50 connects the movable blade 30 and the operation mechanism part. Further, the structure may be such that only the movable electrode is provided at the tip of the movable blade 30. In this case, an insulation means for interrupting the current is required for any part of the movable blade and the operation mechanism part.

The front end of the movable electrode 7 and the load side conductor 9 are connected by a flexible conductor 22. The load side conductor 9 is connected to the cable head 10 through a load side bushing 21A made of ceramic material. The load side sealing metal body 53 is provided at the end of the load side bushing 21A, and the load side sealing metal body 53 is welded and supported around the opening opened by the vacuum grounding container 4 with soldering material and the vacuum grounding is performed. The ceramic surface of the load side bushing 21A exposed to the inside of the container 4 is provided with a ground metal layer 54, and a leakage current flows to the ground E through the vacuum ground container 4, Safety measures are taken so that no danger occurs even when the cable head 10 comes into contact with the cable head 10.

Next, the operation of the phase switch gear will be described with reference to Figs. The movable electrode 7 is moved from this position as shown in FIG. 6 by the blocking position Y2 and disconnecting position Y3 of FIG. 2 disposed between the ground electrode 6 and the fixed electrode 5 as shown in FIG. (7) is rotated in the direction of the arrow X1, and the movable electrode 7 is the so-called ground position Y4 in contact with the ground electrode 39, and the ground electrode 39 is always the spring 36 in the movable electrode direction. It is pressed by. The movable electrode 7 is rotated in the arrow direction X2 from the ground position Y4 as shown in Fig. 8, and the movable electrode 7 is in contact with the fixed electrode 5 and connected to the load side conductor 9 as well. The so-called closing position Y1.

In the feeding position Y1, the movable electrode 7 is in contact with the fixed electrode 5 and is also connected to the load-side conductor 9. In this case, unlike the prior art, since the 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 shortened as compared with that of the prior art, and the electric resistance is reduced, so that the power loss and the generated heat can be reduced accordingly.

On the other hand, in the input position Y1, power is always supplied to the load, and this operation time is longer than the period of use in other positions. When the flexible conductor 22 is not used, the movable electrode 7 is directly loaded with the load-side conductor 9 ), You can think of sliding. This causes the movable electrode 7 to slide directly on the load-side conductor 9, and the current continues to flow while the movable electrode 7 and the load-side conductor 9 are in contact with each other. (9) may be welded. As a result, if the rotational force of the operating mechanism portion is increased in order to peel the welded movable electrode 7 and the load side conductor 9, it can be used extremely low, but the enlargement of the operating mechanism portion cannot be avoided. It becomes expensive. In addition, sliding in the generated heat increases wear and shortens the life of the positive electrode. In addition, when the movable electrode 7 slides into the load side conductor 9, the metal fine particles generated in the movable electrode 7 and the load side conductor 9 are diffused and remain in the vacuum container, so that it is easy to cause insulation breakdown.

In contrast, in the present invention, the movable electrode 7 is connected between the load side conductor 9 and the movable electrode 7 by a flexible conductor 22 which does not directly slide on the load side conductor 9, and the movable electrode 7 And the welding of the load side conductor 9 does not occur, and the rotational force of the operating mechanism portion does not become larger than the above, so that the operation mechanism portion can be miniaturized, and the lifespan of the movable electrode 7 and the load side conductor 9 is longer than the above. It is also economically advantageous. In addition, the flexible conductor 22 is connected between the load side conductor 9 and the movable electrode 7, and as described above, metal vapor generated when the movable electrode 7 slides on the load side conductor 9 is also generated. It is clear that the current interruption characteristic is greatly improved than the above, and the vacuum grounding container 4 can be made smaller in size.

In addition, when the movable electrode 7 moves from the input position Y1 in contact with the fixed electrode 5 as shown in FIG. 5, the positive electrode (the movable electrode 7 will be described as an example because the positive electrode has the same structure) is shown in FIG. 9, the arc A is generated. The arc A is magnetically driven from the electrode center portion 0 toward the electrode outer circumferential end along the spiral groove 7A of the movable electrode 7 to the ring-shaped running surface 7B of the outer circumferential end. The arc A is rotatably driven and extinguished along the traveling surface 7B. For this reason, the gap width G corresponding to the fixed electrode 5 and the movable electrode 7 is gradually narrowed toward the movable blade side than the opposite side to the movable blade side.

When this is applied to the electromagnetic force, the electromagnetic force gradually increases from the opposite side to the movable blade side toward the movable blade side. In general, the arc has a property of moving in the direction of strong magnetic flux. For this reason, for example, the arc A1 of the upper running surface 7U is driven by the magnetic force on the movable blade side to rotate magnetically toward the lower traveling surface 7W, and to the acceleration force of the arc A1 that is rotating magnetically driving. Therefore, it is estimated that arc A2 of lower running surface 7W is also extinguished while rotating magnetically driving toward upper traveling surface 7U side.

Thus, since the arc A extinguishes efficiently while rotating the driving surface 7B, the breaking performance is remarkably improved compared to the electrode of the prior art. In addition, the arcs A1 and A2 are hardly protruded from the running surface 7B, so that there is no fear of punching the inner surface of the vacuum grounding container 4, and the countermeasure is not necessary. In this case, the electromagnetic force may be configured so as to be sequentially strong from the opposite side to the movable blade side toward the movable blade side.

When the electromagnetic force is adjusted, the length of the movable blade 30 in the vacuum grounding container 4 is changed to adjust the gap width G between the fixed electrode 5 and the movable electrode 7 in large and small sizes. For example, the clearance gap G can be easily adjusted by changing the length of the movable insulating cylinder 45 or by changing the position of the main shaft 49. The inclination angle is inclined so that the gap width G gradually narrows from the opposite side to the movable blade side toward the movable blade side. Adjusting the gap width G The movable blade 30 and the gap width G are provided in a larger area or volume in the vacuum ground container 4, so that the gap width G is not easily changed. I can adjust it.

7 A of said spiral grooves are not limited to this, For example, what is necessary is just the groove | channel (for example, linear shape) which magnetically drives the arc A from the electrode center part 0 to the running surface 7B. The arc A does not have to worry about punching the inner surface of the vacuum grounding container 4 only by providing this groove, but in this case, the electromagnetic force is constructed so that the electromagnetic force is sequentially strengthened from the opposite side to the movable blade side. It is important. This groove may be formed in the contact surface of the ground electrode.

In addition, since the present invention can be used even if the grounding device and disconnection position can be removed, the circuit switch gear can also be naturally reduced since the vacuum grounding container and the operation mechanism can be further miniaturized.

On the other hand, from the center of the movable electrode 7 located in the center of the ground electrode 6 and the fixed electrode 5, the volume 5C of the vacuum electrode vessel on the fixed electrode side is determined by the volume 6C of the vacuum electrode vessel on the ground electrode side. Make it wider. To make the volume 5C larger than the volume 6C, vacuum grounding on the fixed electrode side and the ground electrode side from the center (0) of the movable electrode 7 located at the center of the ground electrode 39 and the fixed electrode 5 is performed. If the distance to the container is L1 and L2, the vacuum ground container 4 may be configured so that L1> L2.

As a result, when the movable electrode 7 comes out of contact with the ground electrode 6 or the fixed electrode 5, the ground electrode 6 only flows residual charge and induced current on the power supply side to the ground, so that the current is turned on. Since the ground electrode 6 is much smaller than the fixed electrode 5, the volume 6C may be smaller than the volume 5C. However, the fixed electrode 5 has a larger current than the ground electrode 6. The volume 5C is wider than the volume 6C because the metal particles from the positive electrodes 5 and 7 are generated more than the ground electrode 6 at the time of turning on and off frequently. Silver diffuses in the volume (5C), which reduces residual ions and prevents the current blocking performance from being lowered due to the delay of insulation recovery, thereby improving the current blocking performance.

In addition, since the metal vapor can diffuse into the vacuum ground container on the fixed electrode side, the dielectric breakdown voltage can be improved without damaging the dielectric breakdown voltage. If the volume is 5C, the generated heat at the time of breaking the large current can also be cooled.

11 illustrates another embodiment. The substantially rectangular vacuum ground container 4 having a depth D longer than the height H contacts the movable electrode 7 to the fixed electrode 5 therein, and the corresponding surface of both electrodes is the same as above. Grooves and running surfaces are formed. The fixed electrode 5 is connected to the power supply-side conductor 8 via the connection conductor 8A, and the power supply-side conductor 8 penetrates the through hole of the insulating ceramic member 60 fixed to the vacuum grounding container 4, It is connected to the power supply side bus 61 of three phases. The three-phase power supply side bus bar 61 extends in the direction perpendicular to the power supply side conductor 8. The connecting portion in the vicinity of the connecting rod 62 or the like is surrounded by the insulating cover 64. 50A is a manipulator box in which the manipulator 50B is accommodated.

The arc generated when the movable electrode 7 is inserted into or fixed to the fixed electrode 5 is subdued by the same spiral groove and the running surface formed on the corresponding surface of the positive electrode. And the fixed electrode 5 can arrange | position the connection conductor 8A in arbitrary places in a vacuum ground container. In this case, the power supply side conductor 8 can be arranged in any position in the vacuum ground container by the connection conductor 8A with the fixed electrode 5 as the reference position. That is, since the connection part in the vicinity of the three-phase power supply side conductor 8, the connecting rod 62, etc. can be arrange | positioned in all three phases, a design change can be performed easily.

The circuit part switch gear of the present invention can also be used as a single product such as a circuit breaker for opening and closing the movable electrode with the fixed electrode, a breaker such as a vacuum circuit breaker, a disconnector for contacting and detaching the fixed electrode with the movable electrode, a ground switch, a switch and the like. In addition, the present invention can also be applied to an insulating switch using an insulating medium, for example, SF ₆ gas.

As described above, according to the switchgear of the present invention, since electric power is supplied from the movable electrode to the load-side conductor via the fixed electrode and the flexible conductor, the current path can be shortened significantly compared to that of the prior art, and the electrical resistance is increased. As a result, power loss and generated heat can be reduced accordingly. In addition, the movable electrode is a flexible conductor which does not slide directly on the load side conductor, and is connected between the load side conductor and the movable electrode, and welding of the load side conductor and the movable electrode does not occur, and the operation mechanism and the vacuum switch gear can be miniaturized. In addition, since the current blocking characteristic is also improved, the vacuum grounding container can be further miniaturized. This can also be used for a switch circuit for one circuit from which the grounding device is removed, and the vacuum vessel and the operating mechanism can be miniaturized as long as the grounding device is removed.

Further, according to the electrode of the present invention, for example, the arc A1 of the running surface U is attracted to the electromagnetic force on the movable blade side to rotate magnetically toward the driving surface U side, and the rotating magnetic driving arc ( The arc A2 of the running surface W is also extinguished while driving the rotor A toward the running surface U side by the acceleration force of A1), so that the breaking performance is remarkably improved as compared with the electrode of the prior art. The arcs A1 and A2 protrude from the running surface, and there is no fear of punching the inner surface of the vacuum grounding container 4, so that the countermeasure is unnecessary.

Claims (16)

A movable electrode which extends out of the vacuum ground vessel for rotating the movable electrode via a support point connected to the movable electrode, a movable electrode detached from the fixed electrode and the ground electrode disposed in the vacuum ground vessel, and the movable electrode and the electrical means. A plurality of grooves formed on the electrode surface of the fixed electrode and the movable electrode, and a ring-shaped running formed on the electrode surface of the outer peripheral end of each groove; And a gap between the fixed electrode and the movable electrode, the surface being narrowed sequentially from the opposite side of the movable blade side toward the movable blade side. The method of claim 1, And a conductor extending out of the vacuum ground container which is connected to the movable electrode and the fixed electrode via electrical means. The method of claim 1, And a current blocking means on a part of the movable electrode and the movable blade. The method of claim 1, The switch gear characterized by using a flexible conductor for the said electrical means. The method of claim 1, And a cable head connected to a conductor extending out of the vacuum ground container which is connected to the movable electrode via electrical means. The method of claim 1, And a power supply side busbar connected to a conductor extending out of the vacuum grounding container connected via the fixed electrode and an electrical means. The method of claim 1, And a disconnecting position between the movable electrode and the input position at which the movable electrode is input and the ground electrode and the ground position at which the movable electrode is grounded. The method of claim 1, And a vacuum grounding container configured to extend the volume of the vacuum grounding container on the fixed electrode side from the center of the movable electrode located at the center of the ground electrode and the fixed electrode to be larger than the volume of the vacuum grounding container on the ground power supply side. The method of claim 1, When the distance from the center of the movable electrode located at the center of the ground electrode to the fixed electrode to the vacuum ground vessel on the fixed electrode side and the ground power supply side is L1 and L2, the vacuum ground vessel is configured such that L1 > L2. Switch gear. A movable electrode extending out of contact with the fixed electrode disposed in the vacuum ground container, and a movable blade extending out of the vacuum ground container for rotating the movable electrode via a support point connected with the movable electrode, wherein both electrodes are provided on the corresponding electrode surface. And a plurality of grooves formed, wherein the gap width corresponding to both electrodes is sequentially narrowed from the opposite side of the movable blade side toward the movable blade side. A plurality of movable blades formed on the corresponding electrode surfaces of the movable electrodes extending out of the vacuum grounding container for rotating the movable electrodes via a support point connected to the movable electrodes, the movable blades coming out of contact with the fixed electrode disposed in the vacuum grounding container, and both electrodes. And a gap width gradually narrowed from the opposite side of the movable blade side toward the movable blade side, the gap width being changed by changing the position of the support point or the length of the current blocking means installed in the movable electrode and a part of the movable blade. Switch gear, characterized in that for adjusting. The method according to claim 10 or 11, A switch gear comprising a ring-shaped running surface on an electrode surface at an outer peripheral end of each of the grooves. The method according to any one of claims 1 to 12, The groove is a switch gear, characterized in that the spiral shape. The method according to any one of claims 1, 10, 11, And a conductor extending out of the vacuum ground container which is connected to the movable electrode and the fixed electrode of the switch gear via an electrical means to a cable head and a power bus side of the switchboard load side. The method according to any one of claims 1, 10, 11, A switch gear, characterized in that it is used for a switchgear in which any one or two or more of a breaker, a disconnector, a load breaker, and a grounding device are used. The method according to any one of claims 1, 10, 11, Switch gear, characterized in that to use a sealed container having an insulating medium instead of the vacuum ground container.