KR100370934B1 - Switch gear and power switching apparatus - Google Patents

Abstract

The switch gear comprises: a switching mechanism including a first fixed contact piece 21a to be electrically connected to a bus, a first movable contact piece 22a to be contacted with and removed from the first fixed contact piece 21a, a second fixed contact piece 31a to be electrically connected to the first movable contact piece 22a and also to be electrically connected to a transmission cable, and a second movable contact piece 32a to be contacted with and removed from the second fixed contact piece 31a and also to be grounded externally; a vacuum container 10 for storing the switching mechanism therein; and, an insulating mold 60 for covering the vacuum container 10, the mold 60 including on the surface thereof a conductive layer 60a for grounding. <IMAGE>

Description

Switchgear & Power Switchgear {SWITCH GEAR AND POWER SWITCHING APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a switchgear having an opening and closing mechanism such as a main circuit opening and closing portion for connecting and disconnecting a bus line side conductor and a load side conductor, and a ground opening and closing portion for connecting and disconnecting a load side conductor and a ground side conductor. The present invention relates to a switchgear capable of miniaturization while ensuring safety.

The switchgear for distributing electric power received from the bus bar to various load devices or other electric chambers through a power transmission cable includes a grounded metal container.

In addition, the switchgear and the main circuit switch for exposing the bus-side conductor for receiving power from the bus, and the load-side conductor for distributing power through the power transmission cable to the outside, and connecting and disconnecting the bus-side conductor and the load-side conductor A ground switch, which is used to ground the load-side conductor, is provided in a grounded metal container.

Fig. 28 is a side sectional view showing a conventional switch gear shown in Japanese Unexamined Patent Publication No. 7-28488, and Fig. 29 is an electrical connection diagram of a conventional switch gear. In the drawings, reference numeral 100 denotes a metal container in which insulating gas such as SF ₆ is sealed.

On the outer wall of the metal container 100, two power transmission side bushings 110 and 110 for connection of power transmission cables penetrating the inside and outside of the metal container 100, and a bus bar penetrating the inside and outside of the metal container 100. The bus side bushing 120 (refer FIG. 29) for a connection is provided. Moreover, inside the metal container 100, a vacuum arc extinguishing chamber 200 maintained at high vacuum is provided.

The vacuum arc extinction chamber 200 has an opening / closing contact 201 for opening and closing the bus side and the power transmission cable side shown in FIG. 29 and a first insulating support insulator disposed on the inner wall of the metal container 100. It is supported by 122, and has the bus bar side branch conductor 121 connected to the bus bar side connected to the external bus bar through the bus bar side bushing 120. As shown in FIG.

The power transmission cable side of the vacuum arc dissipation chamber 200 has a second insulated support insulator disposed on the inner wall of the metal container 100 via the first switch 130 which switches the closed, grounded, and disconnected positions. It is connected to the intermediate conductor 160 supported by 161. The intermediate conductor 160 branches in two directions, and in particular, one of the two branch positions is connected to the first load side conductor 111 via a second switch 140 which switches between closing, grounding, and disconnecting positions. The other is connected to the 2nd load side conductor 112 via the 3rd switch 150 which switches the closing, grounding, and disconnection position.

The first load side conductor 111 is connected to an external first power transmission cable through one transmission side bushing 122, and the second load side conductor 112 is connected to an external first transmission side bushing 122. 2 is connected to the power transmission cable.

In addition, each of the first, second, and third switches 13O, 140, and 150 has a driving unit (not shown) with their respective insulating links 170, 17O, 170, and metal links 180, 180, 18O. Swing) to change the closing, grounding, and disconnecting positions. In particular, in the first switch 130, the opening and closing contact 201 in the vacuum arc extinction chamber 200 is connected to the intermediate conductor 160 at its closed position, and the opening and closing contact 201 is connected to the metal container 100 at the ground position. Is connected to the ground conductor 131 which is connected to the ground of the peripheral wall, and in the disconnected position, the opening / closing contact 201 is not connected to either the intermediate conductor 16O or the ground conductor 131.

In the second and third switchgear 140, 15O, the first and second load side conductors 111, 112 are connected to the intermediate conductors 160, respectively, at their respective closing positions, and the first, The second load side conductors 111 and 112 are respectively connected to the ground conductors 141 and 151 corresponding to each of them, and in the disconnected position, the first and second load side conductors 111 and 112 are the intermediate conductors 160. And neither of the ground conductors 141, 151.

In Fig. 28, only one circuit corresponding to the above-described one-phase switchgear is shown. In reality, however, similar three circuits corresponding to the three-phase switchgear are arranged side by side in the depth direction in FIG. That is, as shown in FIG. 29, the conventional switch gear is comprised so that a circuit of three phase components may form a completion circuit.

As described above, in the conventional switchgear, three similar circuits corresponding to the three-phase switchgear in a metal container filled with an insulating gas and grounded to form a single completed circuit are arranged. The switchgear can be switched to a closed position for connecting the busbar side and the power transmission cable side, a grounded position for connecting to the ground potential, and a disconnected position in which neither of the above connections is made, and an arc The opening / closing contact which generate | occur | produces and opens and closes a bus side and a power transmission cable side is arrange | positioned in the vacuum arc extinction chamber provided in the vacuum container.

However, in the conventional switchgear, since the three-phase circuit forming the completion circuit of the switchgear is disposed in the same metal container, not only does it ensure an insulating space for preventing the short circuit, but also a vacuum arc dissipation chamber in the metal container. Should be formed. This complicates the structure of the switchgear and increases the size of the switchgear, which not only reduces the production cost of the switchgear but also limits the installation space of the switchgear.

In addition, when the inside of the metal container is sealed with an insulating gas without installing the vacuum arc extinction chamber in the metal container, there is a problem that the internal vapor of the metal container increases due to the arc generated at the time of switching off the switch gear. when SF ₆ is used as the insulating gas, SF ₆ is caused another problem in handling and management of because it is specified as one of the exhaust gas regulated to prevent global warming, SF _6.

The present invention aims to eliminate the problems found in the above-described conventional switchgear.

Accordingly, the main object of the present invention is to arrange a main circuit switch for opening and closing the bus and the load device, and a switch mechanism such as a ground switch in a vacuum container, covering the vacuum container with an insulating mold, and By providing a conductive layer for grounding the surface, it is possible to prevent ground faults while reducing safety, reduce the production cost of the switchgear, improve the freedom in installing the switchgear, and It is to provide a switchgear that facilitates handling and management.

Moreover, the 2nd objective of this invention is providing the switchgear which can further improve the freedom degree at the time of installation of a switchgear by comprised the electric power receiving member connected to a bus bar by the terminal for electric wire connections, such as a connector. have.

Further, a third object of the present invention is to provide a switchgear which can be grounded through an external switchgear which opens and closes in conjunction with a grounding breaker, so that the possibility of a ground fault occurring in the switchgear can be made very low.

Moreover, the 4th objective of this invention is providing the switchgear which improves the freedom degree at the time of installation of a switchgear by integrally forming the vacuum container which a circuit consists of two or more phases by a mold.

In addition, a fifth object of the present invention is to store a vacuum container in a ground-conductive member formed by forming a conductive material such as a conductive resin into a box shape, and to expose the ground-conductive member to the surface of the switch gear by means of a mold. Is integrated to provide a switchgear that facilitates the production of the switchgear.

Moreover, the 6th object of this invention is to provide the switchgear which embeds electroconductive materials, such as a metal shield, so that the conductor of a load side may face in the mold, and facilitates inspection of switchgears, such as voltage detection.

In addition, a seventh object of the present invention is to cover the vacuum container with a buffer material and to integrate the vacuum ware and the buffer material together by a mold to prevent peeling resulting from the difference in the linear expansion rate between the vacuum container and the mold. It is to provide a switch gear.

Further, an eighth object of the present invention is to provide a power switch that can not only prevent mechanical damage at the junction of a vacuum vessel, but also more reasonably prevent discharge due to electric field concentration.

Further, a ninth object of the present invention is to provide a smaller power switch which improves productivity.

1 is a side cross-sectional view showing a switch gear according to Embodiment 1 of the present invention;

2 is a front layout view showing a switch gear according to Embodiment 1 of the present invention;

3 is an electrical connection diagram of one phase of a switchgear according to Embodiment 1 of the present invention;

4 is a side cross-sectional view showing a switch gear according to Embodiment 2 of the present invention;

5 is a front layout view showing a switch gear according to Embodiment 2 of the present invention;

6 is a side sectional view showing a switch gear according to Embodiment 3 of the present invention;

7 is a front layout view showing the switch gear according to the third embodiment of the present invention;

8 is a side sectional view showing a switch gear according to Embodiment 4 of the present invention;

9 is a side cross-sectional view showing a grounding conductive box used in a switch gear according to Embodiment 4 of the present invention;

10 is a side sectional view showing a conductive shield used in a switch gear according to Embodiment 4 of the present invention;

Fig. 11A is a side sectional view showing a mold in which a conductive shield is embedded around a second fixed conductor bar used in a switch gear according to Embodiment 4 of the present invention, Fig. 11B is a circuit diagram showing an equivalent circuit thereof;

12 is a front layout view of a configuration of a fifth embodiment of the vacuum insulated switchgear according to the present invention;

13 is a side sectional view of a configuration of Example 5;

14 is a side sectional view of a configuration of Example 6;

15 is a side sectional view of a configuration of Example 7;

16 is a side sectional view of a configuration of Example 8;

17 is an enlarged sectional view of a main part of the configuration of Example 9;

18 is another enlarged cross-sectional view of a main part of the configuration of Example 9;

19 is still another enlarged sectional view of a main part of the configuration of Example 9;

20 is an enlarged sectional view of an essential part of the configuration of the tenth embodiment;

21 is an enlarged sectional view of a main part of the configuration of the eleventh embodiment;

22 is still another enlarged sectional view of a main part of the configuration of the eleventh embodiment;

23 is a sectional view of an essential part of a first embodiment of a power switch according to the present invention;

24A and 24B are cross-sectional views of a cushion ring used in a power switch according to the present invention;

25 is a sectional view of an essential part of a modification of the electric power switch shown in FIG. 23;

26 is a sectional view of an essential part of a second embodiment of a power switch according to the present invention;

27 is a sectional view of an essential part of a modification of the electric power switch shown in FIG. 26;

28 is a side cross-sectional view of a conventional switch gear,

29 is an electrical connection diagram of a conventional switchgear.

* Description of the symbols for the main parts of the drawings *

10: vacuum vessel 11: cross pipe

12: insulated tube 13: metal tube

21, 31: 1st fixed conductor rod 22, 32: 1st movable conductor rod

23, 33: bellows 24: main circuit drive unit

In order to achieve the above object, according to a first aspect of the present invention, a switch gear includes an opening and closing mechanism, a container accommodating the opening and closing mechanism therein, and an insulating member covering the container, and an outer surface of the insulating member. It is characterized by providing a conductive layer in the.

According to the 2nd viewpoint of this invention, a switchgear is equipped with the opening-closing mechanism, the container which accommodates the said opening-closing mechanism, and the insulating mold which covers the said container, and provides a conductive layer on the surface of the said mold, It is characterized by the above-mentioned. do.

According to the third aspect of the present invention, in the switch gear of the second aspect of the present invention, the opening and closing mechanism is in contact with and separated from the first fixed contactor and the second fixed contactor, and the first fixed contactor. And a first movable contactor electrically connected to the second fixed contactor, and a second movable contactor contacting / releasing to the second fixed contactor.

According to a fourth aspect of the present invention, there is provided a power receiving member electrically connected to the first fixed contactor, a grounding member electrically connected to the second movable contactor, and a power distribution device electrically connected to the second fixed contactor. It is characterized by providing a switchgear of a third aspect of the present invention further comprising a member.

In the switch gear of the 1st, 2nd, 3rd, and 4th aspect of this invention, the main circuit switch which opens and closes between a bus bar and a loading machine, and switching mechanisms, such as a ground switch, are arrange | positioned in a container, By covering the container with an insulative mold and providing a conductive layer for grounding the surface of the mold, it is possible not only to ensure safety but also to reduce the area inside the container that provides the ground potential to prevent the grounding failure. In addition, by maintaining the entire inside of the container at a high vacuum, the configuration of the switch gear can be simplified and downsized without requiring a protective shield around the contacts to be vacuum arc extinct, as well as reducing the production cost of the switch gear and The improvement of the degree of freedom of installation can be achieved easily. In addition, since no insulating gas such as SF ₆ is used, handling and management of the switch gear can be facilitated.

According to a fifth aspect of the present invention, in the switchgear according to the fourth aspect of the present invention, the power receiving member is a terminal portion connected to a conductor.

In the switch gear of the fifth aspect of the present invention, since the power receiving member is a terminal portion for conductor connection such as a connector, the plurality of switch gears can be arranged side by side in a limited space and can be easily connected to the bus bar. Thereby, the freedom degree at the time of installation of a switchgear can be improved further.

According to a sixth aspect of the present invention, the switch gear of the fourth or fifth aspect of the present invention further includes an external switch that opens and closes in conjunction with the second movable contact, and the grounding member has a surface of the mold. It is insulated from the conductive layer formed in, and characterized in that grounded through an external switch.

In the switch gear according to the sixth aspect of the present invention, it is possible to prevent the occurrence of a ground fault inside the container by removing the region inside the container that provides the ground potential. Thanks to this, the reliability and safety of the present invention can be improved, the structure of the switch gear can be simplified and downsized, the freedom of installation of the switch gear can be increased, and the handling and management of the switch gear can be easily performed. can do.

According to a seventh aspect of the invention, in the switchgear of any of the second to sixth aspects of the invention, the container is comprised of two or more containers, and the two or more containers are molded It is characterized by being integrated integrally by.

In the switchgear according to the seventh aspect of the present invention, by integrating two or more vacuum vessels integrally using a mold, the switchgear can be miniaturized and the degree of freedom in installing the switchgear can be improved. .

According to the eighth aspect of the present invention, the switch gear of any one of the second to seventh aspects of the present invention further includes a ground conductive member, and the conductive layer formed on the surface of the mold layer is a mold layer. And integrally integrated with the ground conductive member by the mold so as to be exposed on the surface of the conductive layer formed on the surface of the substrate.

In the switch gear according to the eighth aspect of the present invention, a conductive material such as conductive resin is molded into a box shape such as cylindrical or rectangular shape to manufacture a ground conductive member, the container is housed in the ground conductive member, and the ground conductive member Integrate them integrally by the mold so that is exposed to the surface of the vacuum vessel. Thereby, formation of the conductive layer of the mold surface at the time of manufacture of a switchgear can be made easy.

According to the ninth aspect of the present invention, the switchgear according to any one of the second to eighth aspects of the present invention further includes a buried conductive member, and the buried conductive member is embedded such that the buried conductive member is embedded in a mold. And integrally integrated with the container by the mold.

In the switch gear according to the ninth aspect of the present invention, a circuit equivalent to a capacitor can be realized by embedding a conductive member such as a metal shield in a mold so as to face a conductor on the load side. This makes it easy to inspect the voltage of the switchgear and the like.

According to a tenth aspect of the present invention, the switchgear according to any one of the second to ninth aspects of the present invention is further provided with a cushioning material held between the container and the mold.

In the switchgear according to the tenth aspect of the present invention, the container is covered with a cushioning material, integrally integrated by the molds, and the buffering material is held between the vacuum container and the mold, thereby resulting from the difference in the linear expansion coefficient between the container and the mold. Peeling can be prevented.

According to an eleventh aspect of the present invention, in the vacuum insulated switchgear having a vacuum container and the necessary number of switches installed in the vacuum container, the vacuum container is molded from a metal material and molded by an insulator.

According to a twelfth aspect of the present invention, in the vacuum insulated switch gear according to the first aspect of the present invention, the surface of the mold is electrically conductive to provide a ground potential.

According to a thirteenth aspect of the present invention, in the vacuum insulated switchgear according to the first or second aspect of the present invention, the circuit of the switch is housed in a vacuum container for each phase.

According to a fourteenth aspect of the present invention, in the vacuum insulated switchgear according to any one of the first to third aspects of the present invention, the vacuum container closes both ends of the cylindrical body member and the body member. It is characterized by being molded into two end members.

According to a fifteenth aspect of the present invention, in the vacuum insulated switchgear according to any one of the first to third aspects of the present invention, the vacuum container includes one body portion of a bottomed cylinder having an open end on one side. And an end member which closes the open end of the member and the trunk member.

According to a sixteenth aspect of the present invention, in the vacuum insulated switchgear according to any one of the first to third aspects of the present invention, the vacuum container includes two body portions of a cylinder with a bottom open at one end side thereof. The two body members are molded together and are joined together such that their respective open ends are in contact with each other.

According to the seventeenth aspect of the present invention, in the vacuum insulated switchgear according to the fourth or fifth aspect of the present invention, the joint end portion of the trunk member may be accommodated in an end member to which the trunk member is in contact. A positioning unit is provided.

According to the eighteenth aspect of the present invention, in the vacuum insulated switchgear according to the sixth aspect of the present invention, the positioning of which the other side is fitted to one of the ends of the open side of the two body members that are in contact with each other Characterized in that the installation.

According to a nineteenth aspect of the present invention, in the vacuum insulated switchgear according to any one of the first to eighth aspects of the present invention, for a main circuit conductor provided in a penetrating state over the inside and outside of the vacuum container, An electric field relaxation ring is provided at an inner edge of the hole that allows the main circuit conductor to penetrate.

According to a twentieth aspect of the present invention, in the vacuum insulated switchgear according to claim 9 of the present invention, the electric field relaxation ring portion is formed so that the inner edge of the hole extends to the outside.

In the electric power switch according to the twenty-first aspect of the present invention, the vicinity of the junction between the insulating cylinder of the vacuum vessel and the metal vacuum vessel component is coated with a cushion ring made of conductive rubber, and the ring is formed together with the outer surface of the vacuum vessel. The part to be applied is applied to the resin insulating layer from the outside thereof.

In the electric power switch according to the twenty-second aspect of the present invention, one end of the conductive rubber cushion ring covers the outer circumferential end of the insulated cylinder, the other end of the conductive rubber cushion ring covers the outer circumference of the metal vacuum container part, and the outer peripheral end of the insulated cylinder The end corner of the cushion ring covering the edge is rounded with a radius slightly smaller than the thickness of this portion, and the end outer circumferential surface of the cushion ring covering the outer circumference of the metal vacuum container part has a conical surface shape whose thickness of the protruding end is almost O. And a stepped portion of the inner circumferential surface of the cushion ring is rounded to have a size larger than that of the soldered fillet formed in the joint portion.

In the power switch according to the twenty third aspect of the present invention, the end of the conductive rubber cushion ring covers the outer circumferential end of the insulated cylinder, the other end of the conductive rubber cushion ring covers the outer circumference of the metal vacuum container component, and the outer circumferential end of the insulated cylinder The end corner of the cushion ring covering the edge is rounded to have an arc of a radius slightly smaller than the thickness of this part, and the end of the cushion ring covering the outer circumference of the metal vacuum container part is formed in a plane perpendicular to the axial direction of the insulating cylinder, The inner diameter end corner of the cushion ring covering not only the step portion of the inner circumferential surface of the insulated cylinder but also the outer circumference of the metal vacuum container component is rounded so as to have a dimension larger than the size of the soldered fillet formed at the joint.

And the connection conductor which connects the electrode of an element switch and the exterior of an electric power switch is connected by the fastening means in the inside of a resin insulation layer.

Further, as the fastening means, a bolt whose head portion has an arcuate side cross section is used.

In addition, a voltage separating electrode is provided on the outer circumference of the connecting conductor inside the resin insulating layer, and the voltage separating electrode is positioned by an insulator fixed to the connecting conductor.

In addition, the connection conductor and the other electrode are connected inside the resin insulating layer, and a voltage separation capacitor having a capacitance larger than the stray capacitance between the electrodes and the phase with respect to the connection conductor is provided.

(Example 1)

Hereinafter, a first embodiment of a switchgear according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a side cross-sectional view of a switchgear according to a first embodiment of the present invention, FIG. 2 is a front layout view of the switchgear, and FIG. 3 is an electrical connection of a switchgear corresponding to one phase out of three phases of the switchgear. It is also. The first embodiment is an opening and closing mechanism configured to close the main circuit contact 20 and close the ground contact 30 when grounding, in the case of distributing electric power received from the bus to the power transmission cable as shown in FIG. .

In Fig. 1, reference numeral 10 has a H-shaped side formed by a transverse pipe and four vertical pipes attached to the upper and lower ends of the transverse pipe, respectively (in the first phase of the switchgear). Corresponding) represents a vacuum vessel, the vacuum vessel 10 is formed closed, the interior of the vacuum vessel 10 is maintained at a high vacuum.

The transverse tube portion 11 of the vacuum vessel 10 is made of metal such as SUS. In particular, the longitudinal end portion of the vacuum vessel 10 located above the one end side of the horizontal pipe portion 11 forms a cylindrical shape, and is inverted with the ceramic insulating tube 12 constituting the side of the horizontal pipe portion 11. It consists of the metal tube 13 which comprises a cylindrical shape with a bottom, and comprises the upper part of the horizontal pipe part 11. As shown in FIG. And the longitudinal end part of the vacuum container 10 located in the lower part of the one end side of the horizontal pipe part 11 is formed in a cylindrical shape, the ceramic insulating tube 14 which comprises the side part of the horizontal pipe part 11, and the bottom It is formed in the cylindrical shape, and is comprised by the metal pipe 15 which comprises the lower part of the horizontal pipe part 11. As shown in FIG.

Similarly, the vertical pipe portion of the vacuum container 10 located above the other end side of the horizontal pipe portion 11 is formed in a cylindrical shape, and the ceramic insulating tube 16 constituting the side of the horizontal pipe portion 11, It is formed in a cylindrical shape with an inverted bottom and consists of a metal tube 17 constituting the upper portion of the transverse tube portion 11. And the longitudinal end part of the vacuum container 10 located in the lower part of the other end side of the horizontal pipe part 11 is formed in a cylindrical shape, and the ceramic insulated pipe 18 and the inverted body which comprise the side part of the horizontal pipe part 11 are inverted, It is formed in the cylindrical shape with one bottom, and is comprised by the metal pipe 19 which comprises the lower part of the horizontal pipe part 11. As shown in FIG.

The first fixed conductor bar 21 penetrating the inside and the outside of the vacuum vessel 10 is fixed to the lower surface of the metal tube 15 located at the lower side of the one end side of the horizontal tube portion 11, The lower end of the first fixed conductor bar 21 that is externally provides a terminal 25 connected to the bus bar 51, and the upper end of the first fixed conductor bar 21 that is inside the resonant container 10, The disk-shaped first fixed contact 21a is fixed.

On the upper part of the 1st fixed contact 21a, the 1st movable contact 22a which forms a disk shape and contacts / isolates with the 1st fixed contact 21a is arrange | positioned, The 1st fixed contact 21a and the 1st movable contactor are arranged. 22a cooperate together when forming the main circuit contact 20.

The first movable contact 22a is fixed to the lower end of the first movable conductor rod 22 penetrating the inside and the outside of the resonant vessel 10 on the upper surface of the metal tube 13 located at the upper end of the transverse tube portion 11. The first movable conductor rod 22 is supported to be movable in the vertical direction through first bellows 23 sealed to the inside of the upper surface of the metal tube 13. The airtightness of the vacuum container 10 is maintained by extending | stretching according to the vertical movement of the 1st movable conductor rod 22 by the 1st bellows 23.

The upper end of the first movable conductor rod 22 outside the vacuum vessel 10 is connected to a main circuit driver 24 used to drive the first movable conductor rod 22 in the vertical direction.

Moreover, the 1st movable conductor rod 22 is the 1st movable conductor rod lower part 22b to which the 1st movable contact 22a is fixed, and the 1st movable conductor rod upper part 22d connected to the main circuit drive part 24. As shown in FIG. And an insulating member 22c made of ceramic located inside the vacuum vessel 10 and held between the first movable conductor rod lower portion 22b and the first movable conductor rod upper portion 22d. 22c insulates the first movable conductor rod lower portion 22b and the first movable conductor rod upper portion 22d from each other.

A second fixed conductor bar 31 penetrating the inside and outside of the vacuum vessel 10 is fixed to the lower surface of the metal tube 18 located at the lower side of the other end side of the transverse tube portion 11 of the vacuum vessel 10. The lower end of the second fixed conductor rod 31 on the outside of the vacuum vessel 10 provides a terminal 35 connected to a power transmission cable 52 used for distributing power to various load devices or other electrical chambers. In addition, a second fixed contact 31a having a disc shape is fixed to the upper end of the inside of the vacuum container 10.

Moreover, since the flexible conductor 40 is inserted between the upper part of the 2nd fixed conductor rod 31, and the lower part of the 1st movable conductor rod 22b, the 2nd fixed conductor rod 31 and the 1st movable conductor rod are included. Lower part 22b is electrically connected with each other.

On the upper part of the second fixed contact 31a, there is a second movable contact 32a which is discoid and contacts / separates the second fixed contact 31a, and the second fixed contact 31a and the second movable contactor ( 32a cooperate together when forming the ground contact 30.

The second movable contact 32a is provided at the lower end of the second movable conductor rod 32 which penetrates the inside and the outside of the vacuum vessel 10 on the upper surface of the metal tube 17 located at the upper end of the other end side of the cross pipe portion 11. It is fixed and the 2nd movable conductor rod 32 is movably supported in the vertical direction via the 2nd bellows 10 which is sealed and fixed to the inner side of the upper surface of the metal pipe 17. As the second bellows 10 expands and contracts with the vertical movement of the second movable conductor bar 32, the airtightness of the vacuum container 10 is maintained.

The second movable conductor rod 32 is connected to the ground potential through the terminal 36 outside the vacuum vessel 10, and the upper end of the second movable conductor rod 32 is the second movable conductor rod ( It is connected to the ground circuit driver 34 which is used to drive 32 in the vertical direction.

The vacuum container 10 is exposed to the metal pipes 13 and 17 positioned on one end side and the other end side of the transverse pipe portion 11 by a mold 60 formed of an insulating resin such as epoxy. On the surface of the mold 60 which is covered and covers the vacuum container 10, a conductor layer 60a on which metal is deposited, for example, is provided so that the surface of the mold 60 can be grounded.

In addition, since the conductive layer 60a is also connected to each of the metal pipes 13 and 17, the metal pipes 13 and 17 also provide a ground potential.

As described above, these switch gears corresponding to one phase portion are arranged side by side in the lateral direction as shown in Fig. 2 to form a switch gear corresponding to the completed circuit. Moreover, since each main circuit drive part 24, 24, 24 and each ground circuit drive part 34, 34, 34 can be arrange | positioned so that they may mutually adjoin, control mechanisms, such as an interlock, between each drive part. Can be easily formed.

In the above embodiment, the main circuit switch and the ground switch are arranged in parallel as the switch mechanism accommodated in the vacuum chamber. However, the present invention is not limited to this form, and various other forms such as a form in which only the main circuit switch is accommodated in the vacuum vessel and a form in which the movable conductor is in contact with the transverse direction are carried out.

In the switch gear according to the first embodiment of the present invention thus formed, by covering the vacuum container with a mold of an insulating resin and providing a conductive layer for grounding the surface of the mold, it is possible to prevent ground faults while ensuring safety. Rather, it enables the simplification and miniaturization of the switch gear.

(Example 2)

Fig. 4 is a side cross-sectional view showing a switch gear in Embodiment 2 of the present invention, and Fig. 5 is a front layout view of the switch gear. In addition, the electrical connection diagram in Example 2 is the same as that of FIG.

In Example 2, the distance 60 between each phase is shortened by integrally integrating the vacuum containers 10, 10, and 10 corresponding to three phases of one circuit with the mold 60, respectively. In addition, since the vacuum containers are insulated from each other by a mold 60 formed of an insulating resin, short circuits are unlikely to occur between phases, and the distance H between the phases is completed in three phases in one vacuum container. It can be shortened as compared with a configuration in which three circuits corresponding to the circuits are arranged.

Further, as the terminal connected to the bus bar 51, a conductor connecting terminal 26 such as a connector is used, whereby two or more switch gears corresponding to two or more circuits are arranged in a limited space. 51 becomes easy to connect. In addition, in Example 2, about the part corresponding to Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

In the switch gear according to the second embodiment of the present invention formed as described above, by integrating three vacuum vessels corresponding to three phases of one circuit into a mold integrally, and using a terminal connected to the bus bar as a terminal for conductor connection. It is possible to realize the improvement of the productivity of the switch gear, the miniaturization of the switch gear, and the improvement of the degree of freedom in mounting the switch gear.

(Example 3)

Fig. 6 is a side cross-sectional view showing a switch gear in Embodiment 3 of the present invention, and Fig. 7 is a front layout view of the switch gear of the present invention. In addition, the electrical connection diagram in Example 3 is substantially the same as FIG.

In Example 3, between the upper part of the first movable conductor rod 22 and the main circuit driver 24 outside the vacuum vessel 10, and the upper part of the second movable conductor rod 32 and the ground circuit driver. By providing the main circuit driver insulating member 22e and the ground driver insulating member 32b between the 34 and the first movable conductor rod 22 and the main circuit driver 24, and the second movable conductor. Insulate between the rod 32 and the ground circuit driver 34.

And when the ground contact 30 is opened by providing the switch 80 which opens and closes in cooperation with the ground contact 30 in the connection line connected to the ground potential from the 2nd movable conductor rod 32, The second movable conductor rod 32 can be disconnected from ground. In addition, the switch 80 may be provided in any of air | atmosphere, a vacuum, and insulating gas, and when it is installed especially in a vacuum or insulating gas, the switch 80 can be further miniaturized.

Moreover, not only the insulating tube 12 located in the upper part of the one end side of the vacuum container 10 but also the vacuum container provided with the recessed part 60b which does not provide the conductive layer 60a in the upper surface of the mold 60. By removing the insulated tube 16 located in the upper part of the other end side of the 10, it is located in the upper part of the metal tube 13 located in the upper part of the one end side of the vacuum container 10, and the other end side of the vacuum container 10. Not only does the insulated metal tube 17 be insulated from the ground, but the potentials of the transverse tube portion 11, the metal tube 13, and the metal tube 17 of the air container 10 are equal to each other. In addition, in Example 3, about the member corresponding to Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

As described above, in the third embodiment of the present invention, when the grounding contact 30 is opened, the inside of the vacuum container 10 is removed by removing a portion capable of providing the ground potential from the inside of the vacuum container 10. The ground fault can be prevented from occurring.

In addition, since the vacuum container 10 provides an intermediate potential, the main circuit driver insulating member 22e and the ground driver insulating member 32b have a withstand voltage performance of less than half with respect to the rated breakdown voltage value. It is possible to reduce the dimensions of the switchgear.

In addition, it is possible to perform a breakdown voltage test on the cable by applying a voltage using the switch 80.

(Example 4)

8 is a side sectional view showing a switch gear according to the fourth embodiment of the present invention. In addition, the electrical connection diagram of Example 4 is the same as that of FIG.

In the switch gear according to the fourth embodiment, the periphery of the transverse pipe portion 11 formed of metal such as SUS is covered with conductive shock absorbing material 91 such as conductive rubber, and the upper and lower ends of the transverse pipe portion 11 are respectively positioned. The circumference | surroundings of the said metal pipe | tube 13, 15, 17, 19 are covered with the insulating buffer material 92, 92, 92, 92, such as a silicone type rubber | gum.

Then, a conductive material such as a conductive resin is molded into a box shape having the same appearance as that of the mold 60 to provide a ground conductive box 90, and the vacuum container 10 is housed in the ground conductive box 90. Injecting an insulating resin into the ground conductive box 90, and integrally integrates the above components of the switch gear by a mold 60 formed of the injected insulating resin. As a result, the conductive shock absorbing material 91 and the insulating shock absorbing material 92, 92, 92, 92 are held between the vacuum container 10 and the mold 60, and the ground conductive box 90 is formed on the surface of the mold 60. Exposed.

9 is a side cross-sectional view illustrating the ground conductive box 90. As shown in FIG. 9, the grounding conductive box 90 is formed in the form of a rectangular box similar to the conductive layer arrange | positioned at the mold 60 in Example 1. As shown in FIG.

These not only prevent the peeling which arises from the difference of the linearity of a window between the vacuum container 10 and the mold 60, but also the formation of the conductive layer 60a in the surface of the mold 60 becomes unnecessary. Therefore, the production process of this switchgear can be simplified.

In addition, a conductive shield 93 that has been electrically conductive is produced by bonding a metal foil 93b of a cylindrical base member 93a having a collar portion or by depositing a metal, and the conductive shield 93 is formed. ) Is embedded around the second fixed conductor bar 31 disposed in the mold such that the conductive shield 93 is disposed to face the second fixed conductor bar 31 through the insulating layer. And the terminal used for voltage detection is arrange | positioned outside the mold 60, and the electrically conductive shield 93 and the mold 60 are electrically connected. In addition, the member of Example 4 attaches | subjects the same number, and abbreviate | omits the description.

10 is a side cross-sectional view of the conductive shield 93. As shown in FIG. 10, in the conductive shield 93, the conductive shield (by bonding the metal foil 93b to the inner side of the cylindrical base member 93a, that is, the side opposite to the second fixed conductor bar 31) is provided. 93 may have electrical conductivity.

FIG. 11A is a side cross-sectional view showing a mold 60 in which a conductive shield 93 is embedded around the second fixed conductor bar 31 to enable voltage detection, and FIG. 11B is a voltage detection circuit of the mold 60. A circuit diagram showing an equivalent circuit of.

As shown in Figs. 11A and 11B, since the electrically conductive second fixed conductor rod 31 and the conductive shield 93 are embedded oppositely through the insulating mold 60, this acts as a capacitor C1. Therefore, in the conductive shield 93, charges corresponding to the charges flowing through the bus bar side are accumulated.

In order to detect the accumulated charges, a circuit grounded through the charge detection cable 94 serving as the capacitor C2 is connected to the terminal connected to the conductive shield 93, and paralleled to the voltage detection cable 94. By connecting devices and devices capable of detecting voltages such as LEDs and voltmeters, the potential of the second fixed conductor rod can be detected qualitatively or quantitatively.

In Embodiment 4 of the present invention formed as described above, by integrating the ground conductive box, the cushioning material, and the conductive shield by the mold, the production process of the switch gear is simplified, and the separation between the vacuum container and the mold is prevented, and the voltage It is possible to facilitate inspection such as detection.

(Example 5)

A vacuum insulated switch gear according to Embodiment 5 of the present invention is configured as follows. That is, for example, a main circuit switch comprising a main circuit switch fixed electrode, a main circuit switch movable electrode, and an insulation rod, a ground switch ground electrode composed of a ground switch ground electrode, and a ground switch movable electrode, and an available conductor. Is stored inside the metal vacuum vessel for each phase, the outer surface of the vacuum vessel is molded using an insulator, and the molded surface of the vacuum vessel is subjected to conductive treatment to provide a ground potential, and the vacuum vessel is insulated bushing. The configuration is connected to the outside through. The fifth embodiment will now be described with reference to FIGS. 12 and 13. 12 is a front layout view of the switchgear, and FIG. 13 is a side cross-sectional view of the switchgear.

12 and 13, this vacuum container 1011 is a metal container molded from a metal material. In particular, in the vacuum container 1011, two end parts which respectively close the cylindrical body member and the two open end sides of the body member are integrally integrated, and both ends of the vacuum container 11 have the necessary number of ends. Appropriate number of holes are provided which can be inserted in the state where the device has penetrated the vacuum container 11, that is, the state has penetrated the inside and the outside thereof.

In the illustrated example, two holes, that is, a total of four holes A, holes B, holes C, and holes D, are formed at the upper end and the lower end of the vacuum container 1011, respectively. In each of these holes A, B, C, and D, ceramic insulating cylinders 1018, 1019, 102O, and 1021 are soldered in a state inserted into the holes associated with them.

In FIG. 13, the main circuit switch fixed electrode 1004 is positioned at the center of the insulating cylinder 1018 (hole A), and the ground switch fixed electrode 1007 is positioned at the center of the insulating cylinder 1019 (hole B). They are soldered in their inserted centers. The main circuit switch fixed electrode 1004 is connected to the bus line 1013 outside the vacuum container 1001, and the ground switch switch electrode 1007 is connected to the power transmission cable 1014 outside the vacuum container 1011. .

On the opposing position side (upper side in FIG. 13) of the main circuit switch fixed electrode 1004, the main circuit switch movable electrode 1005 has an insulating rod 1015 interposed therebetween with a ceramic insulator 1009. ), And the insulating rod 1015 is inserted into the insulating cylinder 1020 (hole C) so as to be movable in the vertical direction.

The main circuit switch movable electrode 1005 and the ground switch fixed electrode 1007 are movably connected to each other via the flexible conductor 1010 in the vacuum container 1011. On the opposite position side (upper side in FIG. 13) of the ground switch ground electrode 1007, the ground switch movable electrode 1008 is inserted to be movable in the vertical direction in the center of the insulating cylinder 1021 (hole D). It is.

The main circuit switch movable electrode 1005 is movable in the vertical direction in FIG. 13 to form main circuit switch portions 1004 and 1005 that can be connected to and disconnected from the main circuit switch fixed electrode 1004. The circuit can be opened and closed. Similarly, the ground switch movable electrode 1008 also moves in the vertical direction in FIG. 13 and forms ground switch portions 1007 and 1008 that can be connected to and disconnected from the ground switch ground electrode 1007.

The insulated rod 1015, the insulating cylinder 1020 (hole C), the ground switch movable electrode 1008, and the insulating cylinder 1021 (hole D) of the main circuit switch movable electrode 1005 have an elastic bellows ( Both ends of the 1006 are fixed, that is, the bellows 1006 not only seals the inside of the vacuum vessel 1011, that is, maintains airtightness, but also the main circuit switch movable electrode 1005 and the ground switch movable electrode. Each 1008 is movable in the vertical direction.

In the fifth embodiment, as described above, the main circuit opening and closing portions 1004 and 1005 and the ground opening and closing portions 1007 and 1008 are housed as one set inside one vacuum container 1011 made of metal, and (switch In the case where the gear is composed of three phases, three vacuum vessels 1011 are disposed, these are collectively molded with an insulator to provide a mold 1012, and the surface of the mold 1012 is subjected to conductive treatment. To ground.

On the other hand, "cylindrical shape" used in the present invention does not mean only a simple cylinder, but a variety of cylindrical shapes including an angular shape such as a square shape or an elliptic shape regardless of the cross-sectional shape. It means shape.

According to the above embodiment, the main circuit opening and closing portions 1004 and 1005 and the ground opening and closing portions 1007 and 1008 are housed inside the vacuum vessel 1011, and the connection from the vacuum vessel 1011 to the outside is insulated from the rod 1015. The switch gear can be configured according to the insulation design, that is, the vacuum design with excellent electrical insulation performance, that is, the switch gear can be made compact.

In addition, since the vacuum container 1011 is molded in three (3 phase) batches, the mold 1012 is provided, and the surface of the mold 1012 is electrically conductive and grounded, so that handling of the switch gear is facilitated.

Moreover, since the vacuum container 1011 is a metal container which can be easily shape | molded in a desired form, compared with the conventional cylindrical container made of ceramic, the vacuum container 1011 can be installed freely.

(Example 6)

The sixth embodiment according to the present invention shows a modification of the construction of the metal vacuum vessel 1011 used in the fifth embodiment, and is housed in other remaining portions of the construction of the sixth embodiment, such as the vacuum vessel 1011. Arrangements of various switches 1004, 1005, 1007, and 1008, various equipments, and these devices are similar to those of the fifth embodiment.

That is, in the metal vacuum container 1011A according to the sixth embodiment, as shown in FIG. 4, two cylindrical body members 1023 are closed to close both ends of the body member 1023. In combination with the two end members 1022A and 1022B, and the joint 1024 of the two end plates 1022A and 1022B as the end member and the body plate 1023 as the body member as the final solder surface. Soldering to realize vacuum sealing

According to the sixth embodiment, the same effect as in the fifth embodiment can be obtained, and the trunk member 1023 can be produced simply by cutting the pipe material, and the end members 1022A and 1022B are made of plate material. Since it can be manufactured simply by cutting | disconnecting, the vacuum container 1011A can be manufactured easily. Therefore, the efficiency of the operation | movement which processes the vacuum container 1011A can be improved.

In addition, the vacuum sealing process which requires the most time in a manufacturing process is performed by vacuum soldering the junction part 24 of the end plate 1022 and the trunk plate 1023 which comprise the metal vacuum container 1011A as a final solder surface. Therefore, the manufacturing time of the vacuum container 1011A can be greatly shortened.

In addition, since the vacuum vessel 1011A is made of metal, the holes A, B, C, and D as the openings of the vacuum vessel 1011A can be easily formed in a desired size, and the main circuit switch is fixed by forming them large. Significantly improved assembling of the electrode 1004, the main circuit switch movable electrode 1005, the insulating rod 1015, the ground switch ground electrode 1007, the ground switch movable electrode 1008, the flexible conductor fixed electrode 1010, and the like can do.

(Example 7)

The seventh embodiment according to the present invention shows a modification of the configuration of the metal vacuum vessel 1011 used in the above-described fifth embodiment, and the other remaining parts of the configuration of the seventh embodiment are similar to the fifth embodiment.

That is, in the metallic vacuum container 1011B according to the seventh embodiment, as shown in FIG. 5, one cylindrical member 1025 having a bottom with one end open is the trunk member 1025. In combination with one end member 1022 which closes the open one end side of the joint), and the joint 1024 of the end plate 1022 as the end member and the trunk plate 1025 as the trunk member is soldered as the final solder surface. To realize a vacuum seal.

According to the seventh embodiment, the same effect as in the fifth embodiment can be obtained, and at the same time, the end members 1022 can be manufactured by cutting the plate material, and the trunk members 1025 are their respective blank members. Can be manufactured by press molding, i.e., because they can be manufactured relatively easily, the workability of the vacuum vessel 1011B can be greatly improved.

Moreover, the vacuum sealing process which requires the most time among manufacturing processes is the vacuum soldering using the junction part 1024 of the end plate 1022 and the trunk plate 1025 of the bottomed metal vacuum container 1011B as a final soldering surface. By doing so, the manufacturing time of the vacuum container 1011B can be significantly shortened.

In addition, as in the sixth embodiment, since the vacuum container 1011B is made of metal, the holes A, B, C, and D as openings of the vacuum container 1011B can be easily formed in a desired size, By making it large, the main circuit switch fixed electrode 1004, the main circuit switch movable electrode 1005, the insulating rod 1015, the ground switch ground electrode 1007, the ground switch movable electrode 1008, the flexible conductor fixed electrode ( 1010) can be significantly improved.

In addition, since the metal vacuum container 1011B is divided into two members, that is, the end plate 1022 and the bottomed body plate 1025, only one joining portion 1024 is required, so that workability of soldering is achieved. Can be further improved. In addition, since the number of joining portions 1024 is one less than that of the sixth embodiment, the reliability of the vacuum vessel 1011B regarding the airtightness can also be improved.

(Example 8)

The eighth embodiment according to the present invention also shows another modification of the structure of the metal vacuum vessel 1011 used in the fifth embodiment, and the rest of the structure of the eighth embodiment is similar to the fifth embodiment. .

That is, as shown in Fig. 16, the metallic vacuum container 1011C according to the eighth embodiment has two bottom cylindrical body members 1025 having one end open at their respective ends. These are combined so as to be in contact with each other, and the joint 1024 between these trunk plates 1025 is soldered as the final solder surface to realize vacuum sealing.

According to the eighth embodiment, the same effect as in the fifth embodiment can be obtained, and at the same time, since the two body members 1025 can be easily manufactured by press molding their respective blank members, the vacuum container 1011C The workability of can be significantly improved.

In addition, since the metal vacuum container 1011C is divided into two members, namely, two body plates 1025 having bottoms, only one joining portion 1024 is required, so that workability of soldering is further improved. You can. In addition, since the number of joining portions 1024 is one less than that of the sixth embodiment, the reliability of the vacuum vessel 1011B regarding the airtightness can also be improved.

Moreover, the vacuum sealing process which requires the most time among manufacturing processes can be performed by vacuum soldering the junction part 1024 of the two bottomed trunk board 1025 of the metal vacuum container 1011C as a final soldering surface. Therefore, manufacturing time can be shortened significantly.

Further, since the metallic vacuum container 1011C is composed of two body plates 1025 used as two bottom body members, the two bottom body plates 1025 combined in the vertical direction are the same. The member of the form can be used, and the component of the same form can be used. In addition, compared with the seventh embodiment, the depth of the vacuum vessel 1011C can be reduced, so that the workability can be improved during the molding of the bottomed trunk plate 1025.

In addition, compared with the fifth embodiment, since the number of junction portions 1024 is reduced by one, the workability of soldering can be improved, and the reliability of its airtightness can be improved.

(Example 9)

According to the ninth embodiment of the present invention, in the second and third embodiments, as shown in FIG. 17, the trunk member 1023 is located on the side of the end member 1022 where the trunk member 1023 is in contact. A positioning portion 1026 that can accommodate the joint end of the () is installed. 17 is an enlarged view of a main part of the vacuum container in which the positioning unit 1026 is formed.

The positioning portion 1026 shown in FIG. 17 is formed as a groove in which the edge portion on the opening side of the trunk portion 1023 can be accommodated. Of course, the shape of the positioning portion 1026 is not limited to the groove shown in this embodiment, and if the body member 1023 easily determines the position at which the end member 1022 should be in contact with, the positioning portion ( As 1026, any other processing portion formed on the end member 1022 can be used. On the other hand, for the vacuum sealing, the groove portion 1026 as the positioning portion 1026 is vacuum soldered as the solder surface.

According to the ninth embodiment, the same effects as in the first to third embodiments can be obtained, and at the same time, the positioning portion 1026 is provided at the junction of the metal vacuum vessel 1011D, so that workability of soldering is further increased. It can be improved, and also the simplification of the brazing jig and the solder position accuracy can be improved.

On the other hand, as the positioning part 1026, as shown in FIG. 18, you may process the bending part 1027 for positioning of the trunk board 1023 as a trunk member on the end plate 1022 side as an end member, 19, the bending groove 1028 for positioning of the trunk plate 1023 may be processed on the end plate 1022 side. Either of them can achieve the same effect on the positioning unit 1026.

(Example 10)

According to the tenth embodiment of the present invention, in the eighth embodiment, two bottom cylindrical body members 1025A and 1025B having one open end are in contact with each other. To be combined. In the tenth embodiment, 1025A of one end of the open side of two body parts in contact with each other is coaxially fitted to the other 2105B of the open side of the body part 1025. A positioning unit 1029 can be provided.

In the example shown in FIG. 20, the diameter of the end of the opening of the trunk member 1025A located in the lower part of FIG. 20 with the opening facing upwards, and the trunk member (located in the upper part of FIG. 20 with the opening facing downward) With respect to 1025B, it can be enlarged a little and the positioning part 1029 is formed and the edge part of the opening part of the trunk | drum member 1025B located in the upper part can be fitted in this positioning part 1029. FIG. On the other hand, this fitting part is vacuum soldered as a soldering surface.

According to the tenth embodiment, the same effect as in the fifth embodiment can be obtained, and at the same time, since the positioning portion 1029 is provided in the fitting portion used as the joining portion of the vacuum vessel 1011E, the workability of soldering can be improved. In addition, the solder jig can be simplified and the solder position accuracy can be improved.

(Example 11)

According to the eleventh embodiment according to the present invention, in the first to sixth embodiments, a hole for allowing the main circuit conductor to penetrate with respect to the main circuit conductor that is installed while penetrating the inside and outside of the metal vacuum vessel is provided. At the inner edge, an electric field relaxation ring portion for alleviating the electric field is provided.

In particular, in the configuration shown in FIG. 21, the metal vacuum vessel is located on the opposite side of the main circuit conductor 1030 penetrating the hole A of the end plate 1022, that is, the opening edge of the hole A of the end plate 1022. The part of the hole A of the end plate 1022 in (1011) (1011A-1011E) is extended to the outside, and the main circuit conductor 1030 is annularly spaced at a moderate interval with respect to the torso of the main circuit conductor 1030. The ring portion 31 for electric field relaxation surrounded by the above is formed.

According to the eleventh embodiment, the same effect as in the fifth embodiment can be obtained. At the same time, a portion of the metal vacuum vessels 1011 (1011A to 1011E) is provided in the portion where the electric field strength is increased to install the ring portion 1031 for the electric field relaxation, so that the electric field can be relaxed without increasing the number of parts. It is also possible to improve the breakdown voltage performance of the switchgear.

On the other hand, as shown in FIG. 22, when manufacturing the metal vacuum vessels 1011 (1011A-1011E), the ring part for electric field relaxation in the hole A of the end plate 1022 as an end member integrally molded with the trunk plate 1025. 1031 may be provided. Of course, even in such a case, the same effect can be obtained.

(Example 12)

Hereinafter, a power switch according to the present invention will be described with reference to the drawings. In addition, in each figure which shows the preferred embodiment of this invention, the same code | symbol is attached | subjected to the same or corresponding part, respectively, and the overlapping part of description is abbreviate | omitted.

23 is a sectional view of principal parts of a power switch according to a twelfth embodiment of the present invention. The power switch includes a main circuit opening and closing portion 2001, a ground opening and closing portion 2002, a vacuum container 2003 enclosing the main circuit opening and closing portion 2001 and a ground opening and closing portion 2002, and an exterior surrounding the vacuum container 2003. I) An insulator 2004 is mainly constituted.

The main circuit opening and closing portion 2001 is composed of a first movable electrode 2011 and a first fixed electrode 2012 having an intermediate portion connected to an insulator, and the ground opening and closing portion 2002 has a second movable electrode 2021 and a second fixed electrode. 2022, the first movable electrode 1011 and the second fixed electrode 2022 are connected to each other by a flexible connecting conductor 2018. The vacuum container 2003 is formed of a ceramic container body 2031 having four openings 2031a and 2031b through which the main circuit opening and closing portion 2001 and the ground opening and closing portion 2002 penetrate in parallel with each other in an elliptical cross section, and made of ceramic. Insulating cylinders 2321 to 2323, cylindrical sealing members 2331 and 2332, and bottoms thereof are formed of the first movable electrode 2011, the second movable electrode 2022, the first fixed electrode 2012, and 2 cup-shaped sealing members 2341 to 2344 through which one of the fixed electrodes 2022 penetrates, a cylindrical arc shield 2035, bellows 2361 and 2362, and electric field relaxation rings 2331 and 2372. ) The outer insulator 2004 is composed of cushion rings 2411 to 2414 and a resin insulating layer 2042.

The structure of the vacuum container 2003 is any one of the cylindrical sealing member 2331 or 2332 and the insulating cylinders 2321 to 2323, respectively, on the outside of the four opening portions 2031a and 2031b provided in the container body portion 2031. One of the sealing members 2341 to 2344 is hermetically bonded to each other by soldering and stacked, and one end of the bellows 2361 or 2362 is soldered to the peripheral edge of the opening of the bottom of the cup-shaped sealing member 2231 or 2342. Further, the electric field alleviation ring 2471 is joined to the peripheral edge of the opening 2031a and the bottom of the cup-shaped sealing member 2343 disposed opposite thereto by soldering, and the peripheral edge of the opening 231b is opposed to the peripheral edge of the opening 231b. The electric field relaxation ring 2372 is respectively joined to the bottom of the cup sealing member 2344 by soldering. Moreover, the insulating cylinder 2232 is provided with the step part in the center part of the inner surface, and this step part is provided with the arc shield 2035 which has an equal gap between the inner peripheral wall surface of the step part, and the arc shield 2035. As shown in FIG. The diameters of the insulating cylinders 2321 and 2322 are larger than the diameters of the insulating cylinders 2323. The reason is that the first movable electrode 2011 includes an insulating rod 2011a and a rod shield 2011b at the center thereof, and an arc shield 2035 is provided at the center of the inner surface of the insulating cylinder 2232. to be.

The main circuit opening and closing portion 2001 is provided in the center of the inner space formed of the container body portion 2031, the insulating cylinders 2321 and 2322, the cylindrical sealing member 2331, and the cup-shaped sealing members 2341 and 2343. The ground opening and closing portion 2002 is provided in the center of the inner space formed by the portion 2031, the insulating cylinder 2323, the cylindrical sealing member 2332, and the cup sealing members 2342 and 2344. The ground opening / closing portion 2002 is connected to each other with a connecting conductor 2018, and the other ends of the first movable electrode 2011 and the bellows 2361 are hermetically sealed by soldering, and the second movable electrode 2021 and the bellows are sealed. The other end of 2236 is hermetically bonded and sealed by soldering, the peripheral edge of the opening of the bottom of the first fixed electrode 2012 and the cup-shaped sealing member 2343 is hermetically bonded and sealed by soldering, and the second fixed electrode is sealed. 2022 and the peripheral edge of the opening of the bottom face of the cup-shaped sealing member 2344 are hermetically bonded by soldering and sealing The. As in the conventional vacuum switch, in order to reduce the residual stress generated at the time of soldering due to the difference in thermal expansion coefficient, the joint between the insulating cylinders 2321 to 2323 made of ceramic and the metal member joined thereto is made of metal The material and shape of the member should be selected appropriately.

From the outer circumferential surface of the cylindrical sealing member 2331 or 2332 to the vicinity of the junction between the insulating cylinder 2321 and the cup-shaped sealing member 2341, and near the junction of the insulating cylinders 2321 to 2323 and the cup sealing members 2341 to 2344. The cushion rings 2411 to 2414 are disposed integrally over each other, and the circuit connection side of the first fixed electrode 2012 and the second fixed electrode 2022 as well as the bottom end of the cup-shaped sealing members 2341 and 2342. Except for the end portions, the outer surfaces of the cushion rings 2411 to 2414 as well as the outer surfaces of the vacuum vessel 2003 and the fixed electrodes 2012 and 2022 are covered with the resin insulating layer 2042.

The cushion rings 2411 to 2414 are manufactured by molding the conductive rubber by compression molding, and in its molded state, the inner diameter of each cushion ring is set to be slightly smaller than the outer dimension of the portion to be fitted with the vacuum vessel 2003. have. The cross-sectional shape of this cushion ring 2411-2414 is shown to FIG. 24A and 24B.

Fig. 24A shows the cross-sectional shape of the cushion rings 2411 and 2412, wherein the X1 portion covers the ends of the insulating cylinders 2321 to 2323, and the Y1 portion covers the ends of the outer circumferential surfaces of the cup sealing members 2341 to 2344. The outer diameter side corner of the X1 portion is rounded with a radius smaller than the thickness of this corner, so that the electric field at this corner can be relaxed when the cushion rings 2411 and 2412 are mounted in the vacuum vessel 2003. And the outer diameter side of the Y1 part is formed in the conical surface so that the thickness of the edge part of a cone surface may become substantially O. Further, the corner portion on the inner diameter side of the Y1 portion adjacent to the X1 portion is rounded to avoid interference with the fillet that should be formed at the junction between the insulating cylinders 2321 to 2323 and the cup sealing members 2341 to 2344.

On the other hand, Fig. 24B shows the cross-sectional shapes of the cushion rings 2413 and 2414, the X2 portion covering the ends of the insulating cylinders 2321 to 2323, and the Y2 portion covering the outer circumferential surfaces of the cylindrical sealing members 2331 to 2332. In addition, the cross section which contact | connects the container trunk | drum 201 is shown with Z. FIG. The outer diameter side corner of the X2 portion is rounded with a radius smaller than the thickness of this corner, so that the electric field at this corner can be relaxed when the cushion rings 2413 and 2414 are mounted in the vacuum vessel 2003. The corner portion on the inner diameter side of the Y2 portion adjacent to the X2 portion is not only the junction portion between the insulating cylinders 2321 to 2323 and the cylindrical sealing member 2331 or 2332, but also the container body portion 2031 and the cylindrical sealing member 2331 or 2332. Each round is formed in order to avoid interference with the fillet, which should be formed at the junction of the). The cross section Z is formed in a plane so as to be in close contact with the container body portion 2031.

The cushion rings 2411 to 2414 are soldered fillets formed at the outer edges of the metallization layers formed at the ends of the insulating cylinders 2321 to 2323 of the vacuum vessel 2003 or at the joint portion between the insulating cylinders 2321 to 2323 and other members. Are used to mitigate field concentration at the outer edge of In addition, the cushion rings 2411 to 2414 not only prevent the resin from penetrating into the soldered fillet when the resin insulating layer 2043 is formed by the molding method, but also shrinkage stress and electric power of the resin insulating layer 2043. The thermal stress caused by the temperature change during the operation of the switch can be alleviated.

The main circuit opening / closing portion 2001 and the ground opening / closing portion 2002 are assembled in the vacuum vessel 2003, and the cushion rings 2411 to 2414 are provided as described above, and fixed with a predetermined mold. By this, the resin insulating layer 2042 of the epoxy resin is formed.

According to the electric power switch configured as described above, the two element switches provided inside the vacuum chamber 2003 are used to form the main circuit opening and closing portion 2001 and the ground opening and closing portion 2002, and the insulated cylinder of the vacuum vessel 2003 is formed. A cushion ring is provided on the outer circumference of the junction with the metal sealing member, and the outer surface of the power switch is surrounded by an outer insulator 2004 except for the vicinity of the sealing portion of the terminal portion and the movable electrode. This structure can prevent the strength of the junction of the vacuum vessel 2003 from decreasing, and also can reduce the insulation distance required between each charged portion of the power switch, which is equivalent to the conventional ring main switchgear. The function can be realized within a small occupation volume. In addition, even if a short circuit occurs inside the power switch, since the part is kept in a vacuum, there is no possibility that the pressure rises in the mounting portion of the power switch. Therefore, it is easy to construct a power switchgear having high safety and having a large economic effect.

In the above description, the power switch is configured to have two element switches corresponding to the one-phase portion composed of a pair of main circuit switch and ground switch. However, the present invention is not limited thereto, and the power switch is configured to have element switches corresponding to integrated three-phase portions.

It is sectional drawing of the principal part which concerns on the modification of the electric power switch shown in FIG. This modification is different from the power switch shown in FIG. 23 in the following points.

That is, of the two openings formed on the main circuit opening and closing portion 2001 side in the container trunk portion 2031, the opening 2031c formed on the first fixed electrode 2012 side is the same size as the arc shield 2035. One end of the arc shield 2035 is joined to the peripheral edge of the opening 2031c by soldering. The insulating cylinder 2322 gradually decreases in diameter near its one end, and the insulating cylinder 2322 has the same dimensions as the insulating cylinder 2323 at its end.

Since the present modification is constituted as described above, the cup-shaped sealing member to be joined to the fixed electrode 2012 on the main circuit opening / closing portion 2001 side is a cup-shaped sealing member to be joined to the fixed electrode 2022 on the ground opening / closing portion 2002 side. Since it can be used, the number of kinds of sealing members can be reduced.

(Example 13)

26 is a partial cross-sectional view of a fixed electrode lead-out of the composite vacuum switch according to the thirteenth embodiment of the present invention.

The first fixed electrode 2012 terminates inside the resin insulating layer 2042 and is connected to the bus bar side connecting terminal 2052 via a connecting conductor 2051. The second fixed electrode 2022 is also terminated inside the resin insulating layer 2042 and connected to the load side connecting terminal 2054 through the connecting conductor 2053. On the outer periphery of the load side connection terminal 2054 inside the resin insulating layer 2042, a cylindrical voltage separation electrode 2055 for voltage detection is arranged concentrically with the load side connection terminal 2054 through the support insulator 2056. have.

In the connection of the first fixed electrode 2012, the connection conductor 2051 and the bus side connection terminal 2052, and the connection of the second fixed electrode 2022, the connection conductor 2053 and the load side connection terminal 2054. Each head portion thereof is fastened using a bolt 2060 having an arcuate cross section.

Since it is comprised as mentioned above, when fixing with the metal mold | die for forming a resin insulation layer in the state which integrated the vacuum container, the main circuit opening-and-closing part, and the ground opening-and-closing part, each movable electrode and each determined by the permissible stress of each soldered part. There is a margin in the relative dimensional error allowed in the positional relationship of the fixed electrode. This is not only a connection part between the first fixed electrode 2012 and the connection conductor 2051 and the bus side connection terminal 2052, but also a connection part between the second fixed electrode 2022, the connection conductor 2053 and the load side connection terminal 2054. This is because the dimension can be adjusted at. For example, by appropriately adjusting each connection part, the connecting conductor 2051 and the bus bar side connecting terminal 2052 are connected together on the assembly jig corresponding to the mold, and the second fixed electrode 2022 and the connecting conductor 2053 and the load side are connected. Connection terminal 2054 is connected together.

By this configuration, the productivity of the power switch can be improved, and its manufacturing cost can be reduced. In addition, since the electric field in the vicinity of the conductor connection portion can be relaxed, the thickness in the corresponding portion of the resin insulating layer 2042 can be reduced, and the power switch can be miniaturized.

In addition, since the positioning of the voltage separating electrode 2055 with respect to the mold is determined by the position of the load side connecting terminal 2054, it is not necessary to position the voltage separating electrode 2055 from the mold side, Workability can be improved. In addition, since the voltage separation electrode 2055 can be mounted at any position of the load side connection terminal 2054, the power distribution inside the resin insulating layer 421 is easily optimized, contributing to the miniaturization of the power switch. .

In the above description, the voltage separation electrode is provided around the load side connection terminal. However, the present invention is not limited thereto, and the structure in which the capacitor 2006 is connected from the connecting conductor 2053 via the connecting line 2055 and the capacitor terminal 2061 is provided outside the mold can also be used. Can be.

When the capacitance of the capacitor 2006 is made larger than the stray capacitance between the electrodes or the stray capacitance between the phases, voltage detection is possible even when the bus side or adjacent phases are charged.

As described above, in the switchgear according to the present invention, an opening and closing mechanism such as a main circuit switch for opening and closing between the bus bar and the load device, and a ground switch is disposed in the container, and the container is covered with an insulating mold. By providing a conductive layer to ground to the surface of the mold, not only safety is ensured, but also the area that provides the ground potential inside the container is made small to prevent grounding disturbance. In addition, by maintaining the entire inside of the container in a high vacuum, it is not necessary to install a protective shield around the contact point where the arc should be vacuum-dissipated, thereby simplifying and minimizing the switch gear, thereby reducing the production cost of the switch gear and switching The freedom of installation of the gear can be easily improved. In addition, since no insulating gas such as SF ₆ is used, the handling and management of the switch gear can be facilitated.

And in the switchgear which concerns on this invention, the power receiving member which electrically connects an opening / closing mechanism and a bus bar is comprised by the terminal part for electrically conductive connection, such as a connector. For this reason, a plurality of switchgear can be arrange | positioned side by side in a limited space, can be connected to a bus bar, and the freedom degree at the time of installation of a switchgear can be improved further.

Moreover, in the switchgear which concerns on this invention, the external switchgear which opens and closes with a grounding switchgear is provided, and the switchgear is grounded through the said external switchgear, and the area | region inside the container which provides ground potential is removed, The ground fault can be prevented from occurring. As a result, the reliability and safety of the switch gear can be improved, the configuration of the switch gear can be simplified and downsized, the production cost of the switch gear can be reduced, and the degree of freedom of installation of the switch gear can be improved. It is easy to handle and manage the switchgear.

Moreover, in the switchgear which concerns on this invention, a some vacuum container can be integrated integrally with a mold. As a result, the switchgear can be miniaturized and the degree of freedom in mounting the switchgear can be increased.

In the switchgear according to the present invention, a conductive material such as a conductive resin is molded into a box shape such as a cylinder or a rectangle, made into a ground conductive member, a vacuum container is housed in the ground conductive member, and the ground conductive member is They are integrally integrated by the mold so as to be exposed to the surface of the vacuum vessel. This can facilitate the formation of a conductive layer on the surface of the mold during production of the switchgear.

Moreover, in the switchgear which concerns on this invention, the circuit equivalent to a capacitor | condenser can be realized by embed | buying the embedding conductive members, such as a metal shield, so that the conductor of the load side may face in the mold. This makes it easy to inspect the state of the switchgear such as voltage detection.

In the switchgear according to the present invention, the vacuum vessel is covered with a cushioning material, the molds are integrally integrated by the mold, and the cushioning material is retained between the vacuum vessel and the mold, thereby resulting from the difference in the linear expansion rate between the vacuum vessel and the mold. Peeling can be prevented.

Further, according to the present invention, the main circuit opening and closing parts and the grounding switch grounding parts can be arranged relatively freely inside the vacuum chamber, respectively. This makes it possible to provide a vacuum insulated switchgear that can be downsized, can be manufactured at low cost, is easy to handle, and has good performance.

Moreover, according to this invention, since the vacuum sealing process which requires the most time among manufacturing processes can be performed by vacuum soldering, manufacturing time of a switchgear can be shortened significantly.

In addition, by forming the vacuum vessel into a plurality of members which are appropriately divided, the processability of the vacuum vessel can be improved.

In addition, since the vacuum container is made of metal, the opening of the vacuum container can be arbitrarily set so that the main circuit switch fixed electrode, the main circuit switch movable electrode, the insulating rod, the ground switch ground electrode, the ground switch movable electrode, and the flexible conductor fixing The assemblability of various equipment such as an electrode can be improved.

According to the present invention, since each metal vacuum container requires only one joint portion, the workability of soldering the vacuum container can be improved.

Moreover, the number of vacuum containers is small, and the reliability of the airtightness of a vacuum container can be improved.

According to the present invention, the positioning operation is performed at the joint portion of the metal vacuum vessel formed of two or more members, thereby improving the efficiency of soldering the vacuum vessel, simplifying the soldering jig, Positioning accuracy can be improved.

According to the present invention, since a portion of the metal vacuum vessel is extended to provide a ring portion for relaxation of the electric field in a portion where the electric field strength is increased, the electric field can be relaxed without increasing the number of parts, and the withstand voltage of the switchgear. It can improve performance.

In the power switch according to the present invention, the vicinity of the junction between the insulating cylinder of the vacuum vessel and the metal vacuum vessel component is covered with a cushion ring of conductive rubber, and the portion covered with the ring is insulated from the outside with the outer surface of the vacuum vessel together with the resin. Since it is covered by a layer, field concentration in the outer peripheral edge part of the fillet formed in the junction part can be alleviated. In addition, the power switch of the present invention can prevent the resin from penetrating into the fillet portion soldered when the resin insulating layer is formed by the molding method, etc., and also due to the shrinkage stress of the resin insulating layer and the temperature change during operation of the power switch. It can alleviate thermal stress.

In addition, one end of the conductive rubber cushion ring covers the outer circumferential end of the insulated cylinder, the other end of the conductive rubber cushion ring covers the outer circumference of the metal vacuum container part, and the end corner of the cushion ring covering the outer circumferential end of the insulated cylinder has The outer periphery of the end of the cushion ring, which is rounded with a radius slightly smaller than the thickness, and covers the outer periphery of the metal vacuum vessel component, is formed in the form of a conical surface whose protruding end thickness almost provides O, and the stepped portion of the inner periphery of the cushion ring It is rounded with dimensions larger than the dimensions of the soldered fillet formed at the joint. Thereby, the electric field concentration in the outer peripheral edge part of the fillet formed in the junction part can be alleviated more reliably.

In addition, one end of the conductive rubber cushion ring covers the outer circumferential end of the insulated cylinder, the other end of the conductive rubber cushion ring covers the outer circumference of the metal vacuum container part, and the end corner of the cushion ring covering the outer circumferential end of the insulated cylinder is the thickness of this corner. Rounded to a slightly smaller radius, the ends of the cushion ring covering the outer circumference of the metal vacuum vessel component are each formed in a plane orthogonal to the axial direction of the insulating cylinder, and the step of the inner circumferential surface of the cushion ring, as well as the step of the metal vacuum vessel component The inner diameter end corners of the cushion ring covering the outer circumference are each rounded to a size larger than the size of the soldered fillet formed at the joint. Therefore, this configuration can more reliably alleviate the field concentration at the outer peripheral edge portion of the fillet formed at the junction.

And since the connection conductor which connects the electrode of an element switch and the exterior of a power switch is connected to the inside of a resin insulation layer by a fastening means, not only can productivity of a power switch be reduced but its manufacturing cost can be reduced.

In addition, since the head portion thereof uses a bold having an arcuate cross section as the fastening means, the electric field in the vicinity of the conductor connecting portion can be alleviated, and the thickness of the portion of the resin insulating layer corresponding to the vicinity thereof can be reduced. Can be miniaturized power switch.

In addition, since the voltage separation electrode is provided on the outer circumference of the connection conductor inside the resin insulating layer, and the voltage separation electrode is positioned by an insulator fixed to the connection conductor, the voltage separation electrode is positioned on the mold side. There is no need, and the positioning workability can be improved. In addition, since the voltage separation electrode can be mounted at any position of the connecting conductor, it is not only easy to optimize the potential distribution inside the resin insulating layer, but also the power switch can be miniaturized.

In addition, the connection conductor and the other electrode are connected inside the resin insulating layer, and a capacitor for voltage separation in which the capacitance thereof is larger than the stray capacitance between the electrodes and the phase with respect to the connection conductor is disposed. Therefore, voltage detection is possible even when the bus side or the phases adjacent to each other are being charged.

Claims (3)

With switchgear, A vacuum container accommodating the opening and closing mechanism, An insulating member covering the container; A conductive layer is formed on the outer surface of the insulating member, The opening and closing mechanism, With the first fixed contact, With a second fixed contact, A first movable contact that is electrically connected with the second fixed contact and is in contact with or away from the first fixed contact; And a second movable contact in contact with and / or away from the second fixed contact. The method of claim 1, The opening and closing mechanism, A power receiving member electrically connected to the first fixed contact; A grounding member electrically connected to the second movable contact; And a power distribution member electrically connected to the second fixed contact. The method of claim 1, The insulating cylinder forms a vacuum container, the vacuum container is made of metal, and the vicinity of the junction between the insulating cylinder of the vacuum container and the metal vacuum container part is covered with a cushion ring of conductive rubber, and the resin insulating layer is outside the vacuum container from the outside thereof. A switchgear characterized by covering a portion covered with a ring with a surface.