JP4578344B2 - Gas insulated switchgear - Google Patents

Description

  The present invention relates to a structure of a switch in a gas insulated switchgear that is used in a gas insulated switchgear, power transmission / distribution and power receiving equipment.

In the prior art of a gas-insulated switchgear in which a disconnecting device as a switching device element having a disconnecting function and a grounding function is housed in a conductive container sealed with an insulating gas and grounded, the disconnecting device as a switching device element is The opening / closing function is executed by the rotation of the blade pivoted at one end, and the device configuration by the disconnecting device as such an opening / closing device element has room for improvement in terms of simplicity (for example, , See Patent Document 1).
Moreover, although what moves a movable part to an axial direction and performs an opening / closing function is proposed (for example, refer patent document 2 and patent document 3), it is hard to say that the simplification in an apparatus structure is thoroughly carried out.
Various proposals have also been made regarding the insulation configuration (see, for example, Patent Document 4 and Patent Document 5), but they have not been optimized as gas-insulated switchgear.

JP 2004-153953 A JP-A-10-112905 Japanese Patent Laid-Open No. 5-20972 Japanese Unexamined Patent Publication No. 63-200396 JP 2000-353460 A

  The present invention opens and closes a plurality of objects to be opened and closed by a mover that moves in a predetermined axial direction, and provides an opening and closing device by providing an insulating member having a predetermined shape that houses the mover and a fixed terminal constituting the object to be opened and closed. An object of the present invention is to provide a gas-insulated switchgear that can prevent the accumulation of conductive foreign matters generated by the opening / closing operation of elements to ensure insulation and achieve simplification of the equipment configuration.

In the gas-insulated switchgear according to the present invention, a plurality of switchgear elements having at least one of a disconnecting function and a grounding function and arranged in parallel as a multiphase configuration are housed in a conductive container sealed with an insulating gas and grounded. In the gas insulated switchgear, a first fixed terminal provided in the switchgear element and a second fixed terminal constituting a first switchable object provided between the switchgear element and the first fixed terminal A third fixed terminal that constitutes a second opening / closing object provided between the opening / closing device element and the second fixed terminal, and is provided in the opening / closing device element and extends in a predetermined axial direction extending in a horizontal direction. The first fixed terminal and the second fixed terminal are disposed so as to be movable in the axial direction, and are electrically connected to the first opening / closing object, and the second fixed terminal and the third fixed terminal. With fixed terminals A conductive mover that opens and closes an electrical connection of the second opening / closing object, an upper surface portion that covers an upper surface of the first, second, and third fixed terminals, and an upper surface of the conductive mover, and both edges of the upper surface portion And an insulating member having a pair of side surfaces that cover the side surfaces of the first, second, and third fixed terminals and the conductive mover. The upper surface portion of the insulating member and the inner surfaces of the side surface portions are provided. And a flange having a notch portion protruding toward the facing space between the first and second fixed terminals and having an inverted U-shaped contour in the facing space between the first and second fixed terminals. The notch part of the said collar part is made into the shape extended below .

According to the present invention, the flange portion having a notch portion protruding toward the facing space between the first and second fixed terminals constituting the opening / closing object and having an inverted U-shaped contour in the facing space is provided. Accordingly, it is possible to provide a gas-insulated switchgear that can suppress the progress of the streamer on the creeping surface in the insulating member that covers the first and second fixed terminals and can improve the withstand voltage performance without increasing the distance between the terminals of the switchgear element. Can do.

Embodiment 1 FIG.
A first embodiment of the present invention will be described with reference to FIG. FIG. 1 shows the configuration of a gas-insulated switchgear according to the first embodiment. FIG. 1A is a side sectional view showing the configuration of the gas-insulated switchgear according to the first embodiment. FIG. 1B is an end view showing the configuration of the gas-insulated switchgear in the first embodiment.

As shown in FIG. 1, a three-position DS: 30 as a switching device element having a disconnecting function of a disconnecting switch (hereinafter referred to as DS) and a grounding function of a grounding switch (hereinafter referred to as ES) is a three-phase switching It is housed in a gas-insulated switchgear main body GS constituted by a metal hermetic container 10 filled with an insulating gas as a multiphase unit constituting the apparatus.
The fixed terminals 1, 2, 3 at the 3 position DS: 30 are provided with holes 1 a, 2 a, 3 a into which the movable conductor 4 can be inserted, and the movable shaft of the movable conductor 4 that operates horizontally and the holes 1 a, 2 a, 3 a In order to connect the movable conductor 4 and the fixed terminals 1, 2, 3 to the outer surface of the movable conductor 4 so that the centers coincide with each other and have an insulation performance determined from the voltage class to be used. The groove part 4a which equips this contactor 5 was provided, and the contactor 5 was mounted | worn with this groove part 4a.
On the inner surface of the holes 1a, 2a, 3a of the fixed terminal and the outer surface of the movable conductor 4, there is a slight gap in the circumferential direction, and a convex portion 4b slidable in the movable direction is formed on the outer surface of the movable conductor 4. 2 b is provided on the inner surface of the hole 2 a of the fixed terminal, and the movable conductor 4 is driven in the horizontal direction by a screw rod 9 connected via an insulating rod 8 to a drive shaft 7 that penetrates the device mounting plate 6 in an airtight manner.

The fixed terminals 2 and 3 and the movable conductor 4 are arranged on the inner surface side of the hermetically sealed container of the equipment mounting plate 6 that is detachably and removably attached to the opening 10a of the hermetically sealed container 10, and the three phases are horizontally arranged at substantially equal intervals. The fixed terminals 2 and 3 are housed in a U-shaped insulating holder 11 made of a solid insulating material such as epoxy resin, and the fixed terminals 2 and 3 are held by mounting brackets 11a and 11b embedded in the upper surface of the U-shaped insulating holder 11 or penetrating the upper surface. ing.
Further, the U-shaped insulating holder 11 opens downward so that conductive foreign matter generated by the operation of the switch does not accumulate in the high electric field portion, and is attached to the device mounting plate 6 with substantially the same outer shape in the moving direction of the main circuit. And a mounting hole 11c in which the side of the device mounting plate slightly widens with respect to a central axis perpendicular to the moving direction of the plurality of main circuits.
Then, female threads 2d and 3c are formed around the holes 2a and 3a into which the central movable conductors of the fixed terminals 2 and 3 are inserted, and the female threads 2d and 3c at the tip of the solid terminal are screwed to the female threads. A solid body such as an epoxy resin having a male screw portion 12a, a through hole 12b larger than the outer shape of the mover in the center, and a collar portion 12c curved in a direction opposite to a terminal facing the periphery of the through hole. An insulation barrier 12 manufactured using an insulator was provided.

  The fixed terminals 1, 2, and 3 include a fixed terminal tip portion 21 into which the movable conductor 4 is inserted and electrically connected directly to the movable conductor 4, and mounting brackets 11 a that are embedded in the insulating holder 11 or penetrate the upper surface of the insulating holder. It is divided into a fixed portion 22 for fixing the fixed terminal tip portion 21 to 11b.

The U-shaped insulating holder 11 opened downward projects from the fixed terminal 3 farthest away from the device mounting plate 6 away from the device mounting plate 6, and the inner upper surface 11d of the insulating holder 11 is a substantially horizontal flat surface. The drooping surface 11e is inclined by about 0.5 ° to 5 ° with respect to the vertical surface and protrudes downward from the lowermost surfaces 2c and 3b of the fixed terminals 2 and 3, and the inner upper surface 11d of the insulating holder 11 and the inner surface 11d. The surface 11e is via a curved surface portion 11f larger than R2 in contact with the inner upper surface 11d and the inner hanging surface 11e.
Further, the outer upper surface 11g of the insulating holder 11 is a plane that is slightly inclined from the center of the insulating holder toward the outside sag on both sides, and it is difficult for conductive foreign substances from accumulating on the top of the outer surface. The surface 11h is the same plane as the inner hanging surface 11e or a plane inclined slightly smaller than the surface perpendicular to the inner hanging surface 11e, and the outer upper surface 11g and the hanging surface 11h are in contact with the outer upper surface 11g and the hanging surface 11h. It is via a curved surface portion 11j larger than R2.

  In the DS according to the first embodiment, DS and ES are connected to all the fixed terminals 1, 2, and 3 on one horizontal axis, and the fixed terminal 1 that is always connected to the ES ground circuit is connected to the operating mechanism PM side. In the vicinity of the device mounting plate 6, the fixed terminal 2 connected to the terminal to be grounded by the ES of the DS is arranged in the center, and the other fixed terminal 3 of the DS is arranged on the opposite side of the operation mechanism PM, and the opening of the sealed container 10 Conductive foreign matter generated by the operation of a switch in which three phases are horizontally arranged at almost equal intervals on the inner surface side of the airtight container of the device mounting plate 6 that is detachably and airtightly attached to the 10a so as not to accumulate in the high electric field portion. By storing and holding in the insulating holder 11 opened downward, the size in the direction perpendicular to the movable direction can be reduced without significantly increasing the size in the movable direction, and metal foreign matter generated during the operation of the switch can be reduced. It does not accumulate in is one insulating holder inner surface of the field portion does not cause degradation of the insulation performance. Moreover, the switch of a gas insulated switchgear provided with the connection part of the conductor connected to another in the movable direction of a switch and a switch from a fixed terminal part can be obtained.

(1) According to the first embodiment of the present invention, a plurality of opening / closing operations including at least one of a disconnecting function as a DS and a grounding function as an ES and having three positions DS: 30 arranged in parallel as a multiphase configuration In the gas-insulated switchgear that constitutes the gas-insulated switchgear main body GS by storing the device elements in a conductive container made of a metal sealed container 10 that is sealed with an insulating gas and grounded, the opening / closing at the three-position DS: 30 or the like A first fixed terminal composed of the fixed terminal 3 provided in the device element and a first fixed terminal composed of the fixed terminal 3 provided in the switching device element composed of the three positions DS: 30 and the like. A second fixed terminal composed of the fixed terminal 2 constituting the object to be opened and closed, and a second fixed terminal composed of the fixed terminal 2 provided in the open / close device element composed of the three positions DS: 30 and the like. A third fixed terminal comprising the fixed terminal 1 constituting the object to be opened and closed, and provided in an opening / closing device element comprising the three positions DS: 30, etc., extending in a predetermined axial direction extending in the horizontal direction and movable in the axial direction A first fixed terminal made of the fixed terminal 3 and a second fixed terminal made of the fixed terminal 2, and a first open / close target electrical connection and a second made of the fixed terminal 2. From the fixed terminals 3, 2, 1, the conductive movable element composed of the movable conductor 4 that opens and closes the electrical connection of the second object to be opened and closed, which is constituted by the fixed terminal and the third fixed terminal composed of the fixed terminal 1. An upper surface portion formed with an inner upper surface 11d and an outer upper surface 11g covering the upper surface of the first, second, and third fixed terminals and the conductive mover 4 composed of the movable conductor 4, and the inner upper surface 11d and the outer upper surface 11g are formed. An inner hanging surface 11e that hangs down from both edges of the upper surface portion and covers the side surfaces of the first, second and third fixed terminals made of the fixed terminals 3, 2, 1 and the conductive mover made of the movable conductor 4, and An insulating member made of an insulating holder 11 having a pair of side portions forming an outer hanging surface 11h, and the insulating members made of the insulating holder 11 are spaced apart from each other as the paired side portions hang downward. And the outer side surface of the side surface portion has a drooping inclination angle with respect to the vertical surface set to a drooping inclination angle of 0.5 ° to 5 ° or less with respect to the vertical surface of the inner side surface. An insulating member having a predetermined shape that opens and closes a plurality of opening and closing objects by a mover moving in the axial direction and houses the mover and a fixed terminal constituting the opening and closing object. By providing the opening and closing device elements to prevent the accumulation of conductive materials generated by the opening and closing operation to ensure insulation, it is possible to provide a gas insulated switchgear which can achieve simplification in device configuration.

(2) According to the first embodiment of the present invention, in the configuration of the item (1), the inner hanging surface 11e and the outer hanging surface are formed on the upper surface portion where the inner upper surface 11d and the outer upper surface 11g of the insulating member are formed. Since the curved surface portion formed of the outer curved surface 11j is provided on the outer surface of both end edges that hang down the side surface portion on which the surface 11h is formed, by providing an insulating member having a predetermined shape that houses the movable element and the fixed terminal constituting the opening / closing object. Provided is a gas-insulated switchgear that can reliably prevent the accumulation of conductive foreign matters generated by the opening / closing operation of an opening / closing device element, not only on the inner surface but also the outer surface of the insulating member, to ensure insulation and to achieve simplification of the device configuration be able to.

(3) According to the first embodiment of the present invention, in the configuration of the item (1) or the item (2), the movable conductor 4 is fitted to the first and second fixed terminals 2 and 3. A recess 2b and a protrusion 4b formed by recesses and projections extending in the moving direction of the conductive mover comprising the movable conductor 4 between the conductive mover and the first and second fixed terminals 2 and 3. Since the engaging portion consisting of the concave portion 2b and the protruding portion 4b guides the movement of the conductive movable element consisting of the movable conductor 4, the movable element and the opening / closing object are configured. By providing an insulating member of a predetermined shape that houses the fixed terminal to be used, it is possible to prevent insulation from accumulating conductive foreign substances generated by the opening / closing operation of the opening / closing device elements, ensuring insulation, achieving simplification of the device configuration, and opening / closing Equipment element It is possible to provide a gas insulated switch gear smoothly perform the closing operation.

(4) According to the first embodiment of the present invention, in the configuration of the above item (3), the conductive movable element composed of the movable conductor 4 that is rotationally driven by the rotational member composed of the drive shaft 7 operated by the operating means. A drive member made of a screw rod 9 screwed to the drive member is provided, and the conductive mover made of the movable conductor 4 is moved in the axial direction by the rotational drive of the drive member made of the screw rod 9. By providing an insulating member having a predetermined shape for housing the child and the fixed terminal that constitutes the opening / closing object, it is possible to prevent the accumulation of conductive foreign matters generated by the opening / closing operation of the opening / closing device element to ensure insulation, and to simplify the device configuration In addition, it is possible to provide a gas-insulated switchgear that can achieve the opening and closing operation of the switching device element with certainty.

(5) According to the first embodiment of the present invention, in any configuration from the item (1) to the item (4), the first and second fixed terminals including the fixed terminals 2 and 3 are The fixed terminal tip portion 21 that is in conductive contact with the conductive mover made of the movable conductor 4 and the solid terminal mounting brackets 11 a and 11 b provided on the insulating member made of the insulating holder 11. Since the fixed terminal fixing portion 22 is fixed to the fixture, the opening and closing device element is opened and closed by providing an insulating member having a predetermined shape for storing the movable element and the fixed terminal constituting the opening / closing object. The gas insulation switch that prevents the accumulation of generated conductive foreign matter and secures insulation, achieves simplification of the equipment configuration, and facilitates assembly of the fixed terminal. It is possible to provide a gear.

(6) According to Embodiment 1 of the present invention, in any one of the configurations from (1) to (5), the central opening into which the conductive movable element made of the movable conductor 4 is inserted. An insulating barrier 12 made of a solid insulator such as a bowl-shaped epoxy resin having an opening at the center is provided to cover the first and second fixed terminals made up of the fixed terminals 2 and 3, and the insulating barrier 12 is Since the first and second fixed terminals including the fixed terminals 2 and 3 are detachably attached to the central openings of the first and second fixed terminals, the insulating member having a predetermined shape that houses the movable element and the fixed terminal constituting the opening / closing object This prevents the accumulation of conductive foreign matter caused by the opening / closing operation of the switchgear element, ensures insulation, achieves simplification of the instrument configuration, and ensures accurate electrical insulation of the fixed terminal. It is possible to provide a gas insulated switchgear.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIG. FIG. 2 shows the configuration of the gas-insulated switchgear according to the second embodiment. FIG. 2A is a side sectional view showing the configuration of the gas-insulated switchgear according to the second embodiment. FIG. 2B is an end view showing the configuration of the gas-insulated switchgear according to the second embodiment.
In the second embodiment, the configuration other than the specific configuration described here has the same configuration contents as the configuration in the first embodiment described above, and exhibits the same operation. In the drawings, the same reference numerals indicate the same or corresponding parts.

In the DS of the second embodiment, the U-shaped insulating holder 11 for storing and holding the fixed terminals 1, 2 and 3 has a hook-like formation portion in which a hook having an arc-shaped cross section whose upper part is about a semicircle is inverted. The cross section is formed in a dome shape. The lower hanging parts on both sides hang in a substantially vertical direction from the bowl-shaped part in parallel with each other.
An inner curved surface portion 11f is formed on the inner side of the hook-shaped portion having the arc-shaped cross section of the insulating holder 11, and an outer curved surface portion 11j is formed on the outer side of the hook-shaped forming portion having the arc-shaped cross section. The outer hanging surfaces 11h of the insulating holder extend in the vertical direction in parallel with the outer hanging surfaces 11h on both sides.

  According to the second embodiment of the present invention, a plurality of switchgear elements having three positions DS: 30, etc., which have at least one of a disconnect function as a DS and a ground function as an ES and are arranged in parallel as a multiphase configuration, are provided. In a gas-insulated switchgear that is housed in a conductive container composed of a metal hermetic container 10 that is filled with an insulating gas and is grounded to form a gas-insulated switchgear main body GS, the switchgear element having the three-position DS: 30 or the like is used. A first opening / closing object is provided between the first fixing terminal including the fixed terminal 3 provided and the first fixing terminal including the fixing terminal 3 provided in the opening / closing device element including the three positions DS: 30. A second fixed terminal composed of the fixed terminal 2 and a second open / close between the second fixed terminal composed of the fixed terminal 2 provided in the switching device element composed of the three positions DS: 30 and the like A third fixed terminal comprising the fixed terminal 1 constituting the elephant, provided in the switchgear element comprising the three positions DS: 30, etc., extends in a predetermined axial direction extending in the horizontal direction and is movable in the axial direction The first electrical terminal to be opened / closed and the second electrical terminal to be connected to the stationary terminal 2 are configured by a first stationary terminal comprising the stationary terminal 3 and a second stationary terminal comprising the stationary terminal 2. A conductive mover comprising a movable conductor that opens and closes an electrical connection of a second opening / closing object constituted by a fixed terminal and a third fixed terminal comprising a fixed terminal; An insulating member made of an insulating holder 11 having a dome-shaped cross section covering the upper and side surfaces of the first and second and third fixed terminals made of the fixed terminals 3, 2, 1 and the conductive mover made of the movable conductor 4. Because we established A plurality of opening and closing objects are opened and closed by a mover moving in the axial direction, and an insulating member having an arcuate cross section and having a dome-shaped cross section is provided on the upper part for housing the mover and the fixed terminal constituting the opening and closing object. Accordingly, it is possible to provide a gas-insulated switchgear that can prevent the accumulation of conductive foreign matters generated by the opening / closing operation of the opening / closing device element to ensure insulation and achieve simplification in the device configuration.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIG. FIG. 3 shows the configuration of the gas-insulated switchgear according to the third embodiment. FIG. 3A is a side sectional view showing the configuration of the gas-insulated switchgear according to the third embodiment. FIG. 3B is an end view showing the configuration of the gas-insulated switchgear according to the third embodiment.
In the third embodiment, the configuration other than the specific configuration described here has the same configuration contents as the configurations in the first and second embodiments described above and exhibits the same operation. It is. In the drawings, the same reference numerals indicate the same or corresponding parts.

  As shown in FIG. 3, between the opposing fixed terminals 1, 2 and 3 on the inner surface of the U-shaped insulating holder 11 for storing and holding the fixed terminals 2 and 3, perpendicular to the movable direction of the movable conductor 4, in the case of DS In the case of ES, a fixed connected to the center of the opposing fixed terminals 1 and 2 or the main circuit so that the distance from the fixed terminals 2 and 3 is substantially equal symmetrically with respect to the centers of the opposing fixed terminals 2 and 3. At a position close to the terminal 2, a flange 11k lacking in the downward U-shape larger than the outer shape of the movable conductor 4 is provided, and a portion 11m lacking in the center U-shape of the collar 11k extends downward.

  In the DS of the third embodiment, between the opposing fixed terminals on the inner surface of the U-shaped insulating holder 11 that stores and holds the fixed terminals 1, 2, 3, perpendicular to the movable direction of the movable conductor 4, In the case of ES, the movable conductor is located at a position close to the center of the opposing fixed terminal or the fixed terminal connected to the main circuit so that the distance from the fixed terminal is approximately equal to the center of the opposing fixed terminal. By providing the flange 11k lacking in the U-shape that extends downward downward larger than the outer shape of 4, the progress of the streamer along the inner surface of the insulating holder 11 is suppressed, and the withstand voltage without increasing the distance between the terminals of DS and ES It is possible to improve performance.

  According to the third embodiment of the present invention, in the configuration of the first embodiment, the first and second fixed terminals 1, 2, 2 are provided on the upper surface portion and the inner surface of the side surface portion of the insulating member 11. Providing a flange 11k having a notch portion protruding toward the facing space between the three, and having an inverted U-shaped contour in the facing space between the first and second fixed terminals 1, 2, 3; Since the notch portion of the flange portion 11k has a shape that extends downward, an insulating member having a predetermined shape that houses the movable element and the fixed terminal that constitutes the opening / closing object is provided to generate the opening / closing operation of the opening / closing device element. It is possible to prevent the accumulation of conductive foreign substances to ensure insulation, to achieve simplification of the equipment configuration, and to prevent the streamer from progressing along the insulation member and to increase the distance between the terminals of the switchgear element. It is possible to provide a gas insulated switchgear which can not improve the withstand voltage performance.

Embodiment 4 FIG.
A fourth embodiment of the present invention will be described with reference to FIG. FIG. 4 shows the configuration of the gas-insulated switchgear according to the fourth embodiment. FIG. 4A is a bottom view showing the configuration of the gas-insulated switchgear according to the fourth embodiment. FIG. 4B is an end view showing the configuration of the gas-insulated switchgear according to the fourth embodiment.
In the fourth embodiment, the configuration other than the specific configuration described here has the same configuration contents as the configurations in the first and second embodiments described above, and exhibits the same operation. It is. In the drawings, the same reference numerals indicate the same or corresponding parts.

  As shown in FIG. 4, between the opposing fixed terminals 1, 2, 3 on the inner surface of the U-shaped insulating holder 11 that stores and holds the fixed terminals 1, 2, 3, from a plane perpendicular to the movable direction of the movable conductor 4. A saddle 11p lacking in the U-shape that extends downward downward larger than the outer shape of the movable conductor is provided so as to incline, and this saddle 11p extends to the tip 11n of the hanging portion of the insulating holder and the outer surface 11h of the hanging portion of the insulating holder. When the protrusions 11q are continuously formed, and the plurality of insulating holders 11 are arranged on the device mounting plate 6 at substantially equal intervals smaller than the outer shape of the flanges 11p of the insulating holders, The protrusions 11q of the part 11p are arranged so as not to interfere with each other.

  In the DS of the fourth embodiment, the inner surface of the U-shaped insulating holder 11 that houses and holds the fixed terminals 1, 2, 3 is inclined between the opposing fixed terminals from the plane perpendicular to the movable direction of the movable conductor 4. In this way, a flange 11p lacking in the U-shape that extends downward in the center larger than the outer shape of the movable conductor 4 is provided, and this flange 11p extends to the tip 11n of the hanging portion of the insulating holder and the outer surface 11h of the hanging portion of the insulating holder 11. Further, the plurality of insulating holders 11 are formed on the device mounting plate 6 at intervals smaller than the outer shape of the flange 11p of the insulating holder 11 by forming the protrusions 11q. 11q can be arranged without interfering with each other.

  According to the fourth embodiment of the present invention, in the configuration in the first embodiment, the first and the second made of the fixed terminals 2 and 3 are formed on the upper surface portion and the inner surface of the side surface portion of the insulating member made of the insulating holder 11. A flange 11p having a notch portion having an inverted U-shaped contour in the facing space between the first and second fixed terminals and projecting toward the facing space between the fixed terminals of the first and second fixed terminals And a protrusion 11q that protrudes outward from the side surface of the insulating member made of the insulating holder 11 is provided on the flange 11p. Since the projections 11q are arranged at different positions so that the projections 11q do not interfere with the projections 11q of the adjacent opening / closing device elements, the movable terminal and the fixed terminal that constitutes the opening / closing object are provided. By providing an insulating member of a predetermined shape to be accommodated, it is possible to prevent the accumulation of conductive foreign matters generated by the opening / closing operation of the opening / closing device element to ensure insulation, achieve simplification of the device configuration, Providing a gas-insulated switchgear that suppresses the progress of the streamer on the outside surface, improves the withstand voltage performance without increasing the distance between terminals of switchgear elements, and can arrange adjacent switchgear elements without interfering with each other can do.

Embodiment 5 FIG.
A fifth embodiment of the present invention will be described with reference to FIG. FIG. 5 shows the configuration of the gas-insulated switchgear according to the fifth embodiment. FIG. 5A is a bottom view showing the configuration of the gas-insulated switchgear in the fifth embodiment. FIG. 5B is an end view showing the configuration of the gas-insulated switchgear according to the fifth embodiment.
In the fifth embodiment, the configuration other than the specific configuration described here has the same configuration contents as the configuration in the fourth embodiment described above, and exhibits the same operation. In the drawings, the same reference numerals indicate the same or corresponding parts.

  In the fifth embodiment, as shown in FIG. 5, the tip 11n of the hanging portion of the U-shaped insulating holder 11 that houses and holds the fixed terminals 2 and 3 is configured to bend inward.

  In the DS of the fifth embodiment, the case where a plurality of insulating holders 11 are arranged by refracting the leading end 11n of the hanging portion of the U-shaped insulating holder 11 that stores and holds the fixed terminals 1, 2, and 3 inward. It is possible to increase the distance of the tip 11n of the hanging part 11n of the insulating holder 11 or the distance 11n of the hanging part 11n of the insulating holder and the inner wall of the hermetic container 10. It is possible to improve the withstand voltage performance by increasing the length of the streamer.

  According to the fifth embodiment of the present invention, in the configuration in the fourth embodiment, the conductive movable element including the first, second and third fixed terminals 1, 2, 3 and the movable conductor 4 is housed. Since the lower end edge 11n of the side surface portion of the insulating member made of the insulating holder 11 is refracted inward, an opening / closing device is provided by providing an insulating member having a predetermined shape that houses the movable element and the fixed terminal constituting the opening / closing object. Prevents accumulation of conductive foreign matter generated by the opening and closing operation of the element to ensure insulation, can achieve simplification in the equipment configuration, and further, the distance of the tip of the side surface of the insulating member when a plurality of insulating members are arranged, Alternatively, it is possible to increase the distance between the end of the side surface of the insulating member and the inner wall of the sealed container, and when the streamer progresses from the front end of the side of the insulating member, the length of the streamer until the flashing is increased. It is possible to provide a gas insulated switchgear capable of improving withstand voltage performance by the.

In the embodiment according to the present invention, configurations shown in the following items (A1) to (A6) are proposed.
(A1) The main circuit section is used in a 3-position DS in which an ES function is added to the DS, ES, and DS stored in a grounded metal sealed container filled with an insulating gas such as SF6 gas, dry air, and nitrogen gas. It has a shape that takes into account the insulation performance determined from the voltage class to be used, has a hole into which the movable conductor 4 can be inserted, and electrically connects the movable conductor 4 and the fixed terminals 1, 2, 3 on the outer surface of the movable conductor 4. A groove portion 4a equipped with a contact 5 for connecting to the center of the main circuit fixed terminal 2 having the contact 5 attached to the groove 4a is aligned with the center of the hole of the movable conductor 4 that can move horizontally. As shown in the figure, it is arranged at intervals having an insulation performance determined from the voltage class to be used, and among the fixed terminals, there is a slight gap in the circumferential direction between the inner surface of the hole of one fixed terminal 2 and the outer surface of the movable conductor. Concave with slidable in the movable direction And either of the projections on the outer surface of the movable conductor 4, provided toward the movable conductor 4 opposite to the fixed terminal 2 internal surface,
The movable conductor 4 is driven in the horizontal direction by a screw rod 9 that is integrated with the insulating rod 8 or connected via the insulating rod 8 to a drive shaft 7 that penetrates the device mounting plate 6 in an airtight manner. The conductive foreign matter generated by the operation of the switch, in which three phases are horizontally arranged at substantially equal intervals, is disposed on the inner surface of the sealed container, which is airtightly attached to the opening of the sealed container. The lower part is opened so as not to accumulate in the high electric field portion, and the side of the device mounting plate 6 with respect to the central axis perpendicular to the movable direction of the plurality of main circuits is attached to the sealed container 10 with substantially the same outer shape in the moving direction of the main circuit. A mounting bracket 11 which is housed in a U-shaped insulating holder 11 made of a solid insulator such as an epoxy resin having a mounting hole which slightly expands, and is embedded in or penetrates the upper surface of the U-shaped insulating holder 11. It is held by 11b.
The fixed terminals 2 and 3 include a fixed terminal tip portion 21 into which the movable conductor 4 is inserted and directly electrically connected to the movable conductor 4, and a fixed terminal tip portion embedded in an insulating holder or attached to a fitting that passes through the upper surface of the insulating holder. It divides | segments into the fixing | fixed part 22 which fixes 21. FIG.
On the other hand, the U-shaped insulating holder 11 that opens downward projects from the main circuit terminal farthest away from the device mounting plate 6 away from the device mounting plate 6, and the inner upper surface of the insulating holder 11 is a generally horizontal plane, The drooping portion is inclined by about 0.5 ° to 5 ° with respect to the vertical plane and protrudes downward from the lowermost surface of the main circuit terminal. The inner upper surface 11d and the inner drooping portion 11e are formed on the inner upper surface 11d and the inner surface. It is via a curved surface portion larger than R2 that is in contact with the hanging portion 11e.
Further, the outer upper surface of the U-shaped insulating holder 11 that opens downward is a plane or a plane that is slightly inclined from the center of the insulating holder toward the outer sag on both sides, and the outer sag part 11h is the inner sag part 11e. The outer upper surface 11g and the hanging part 11h have a curved surface part 11j larger than R2 in contact with the outer upper surface 11g and the hanging part 11h. A switch used for a gas-insulated switchgear characterized by being interposed.

(A2) In the switch having the characteristics of the item (A1), the main circuit movable conductor 4 is perpendicular to the movable direction between the opposing main circuit terminals on the inner surface of the U-shaped insulating holder 11 that houses and holds the main circuit terminals. In the case of DS, the distance from the fixed terminal is approximately equal to the center of the opposite fixed terminal, and in the case of ES, the position is close to the center of the opposite fixed terminal or the main circuit side terminal. A switch for use in a gas-insulated switchgear, characterized in that a flange 11k lacking in the downward U-shape larger than the outer shape of the movable conductor 4 is provided, and the portion lacking in the center U-shape of the collar 11k extends downward. .

(A3) A gas-insulated switchgear characterized in that, in the switch having the feature of the item (A1), the tip 11n of the hanging portion of the U-shaped insulation holder 11 that houses and holds the main circuit terminal is refracted inward. The switch used for

(A4) In the switch having the characteristics of the items (A1) and (A2), the main circuit movable conductor is disposed between the opposing main circuit terminals on the inner surface of the U-shaped insulating holder 11 that houses and holds the main circuit terminals. Provided with a flange 11p lacking in a U-shape that extends downward in a direction larger than the outer shape of the movable conductor so as to incline from a plane perpendicular to the movable direction, and this flange 11p is the tip of the hanging portion 11n of the insulating holder 11 and Continued on the outer surface 11h of the hanging part of the insulating holder, and when a plurality of insulating holders 11 are arranged on the device mounting plate 6 at almost equal intervals, the flanges 11p on the outer surface of the insulating holder 11 do not interfere with each other. A switch used for gas-insulated switchgear.

(A5) In the switch having the feature of the item (A1), the U-shaped insulating holder 11 for storing and holding the main circuit terminal is electrically connected to the mounting brackets 11a and 11b embedded in the insulating holder 11 or penetrating the insulating holder. As in the case of the insulating holder 11, the electric field relaxation shield refracted in a U shape so that the lower part opens and is almost at the center of the hanging part of the insulating holder 11 is fixed to a mounting bracket electrically connected to the electric field relaxation shield. A switch used for a gas-insulated switchgear, embedded in a solid insulator near the end of the main circuit terminal.

(A6) In the switch having the feature of (A1), a female screw is formed around the hole into which the movable conductor 4 at the center of the fixed terminal is inserted, and the female screw portion is attached to the female screw at the tip of the solid terminal. Such as an epoxy resin having a male screw part that is screwed to the center, a through hole larger than the outer shape of the movable conductor 4 in the center, and a collar part that curves in a direction opposite to the terminal facing the through hole. A switch used for a gas-insulated switchgear, which is provided with an insulation barrier 12 manufactured using a solid insulator.

Problems to solve the problems of the prior art in the embodiment according to the present invention are as shown in the following items (B1) to (B3).
(B1) DS and ES are mounted on an insulating frame in which openings are provided in a part below DS and a part above ES, and DS and ES are mounted side by side, and are driven by individual drive shafts to be fixed terminal portions. Is covered with the insulating holder 11, the combination of DS and ES is reduced in size in the direction perpendicular to the movable direction without significantly increasing the dimension in the movable direction, and the metallic foreign matter generated during the operation of the switch is a high electric field. A switch used for a gas-insulated switchgear that does not cause deterioration in insulation performance due to accumulation on the inner surface of an insulation holder, which is one of the parts.

(B2) Moreover, the switch used for the gas insulation switchgear provided with the connection part of the conductor connected to others in the movable direction of a switch and a switch from a fixed terminal part is obtained.

(B3) Since the insulating holder 11 embeds metal fittings 11a and 11b that can relax the electric field in the vicinity of the fixed terminal portion and can fix the DS and ES fixed terminals individually or in common, The shape is complicated, the shape of the insulating holder 11 is simplified without impairing the insulating performance, and a switch used for a gas-insulated switchgear with excellent productivity is obtained.

Means for solving the above-described problems in the embodiment according to the present invention are as shown in the following items (C1) to (C10).
(C1) The fixed terminal of the switch has a shape that takes into account the insulation performance determined from the voltage class to be used, a hole into which the movable conductor 4 can be inserted is provided inside, and between the movable conductor 4 and the fixed terminal on the inner surface of the hole A groove part 4a equipped with a contactor 5 for electrically connecting the contactor 5 is provided, and a main circuit fixed terminal having the contactor 5 attached to the groove part 4a is connected to the movable shaft of the movable conductor 4 and the center of the hole which can move horizontally. Are arranged at intervals having insulation performance determined from the voltage class to be used, and among the fixed terminals, the inner surface of one fixed terminal hole and the outer surface of the movable conductor are slightly in the circumferential direction. One of a concave portion and a convex portion having a gap and slidable in the movable direction is provided on the outer surface of the movable conductor 4, and the opposite side of the movable conductor 4 is provided on the inner surface of the fixed terminal. The drive shaft 7 that penetrates the airtightly with the insulating rod 8 is integrated with or completely disconnected from the drive shaft 7. Driving in the horizontal direction by the threaded rod 9 which is connected via a rod 8.

(C2) The main circuit terminal and the movable conductor 4 are arranged in three phases horizontally at substantially equal intervals on the inner surface side of the sealed container 10 of the device mounting plate 6 which is detachably mounted in the opening 10a of the sealed container 10. In order to prevent the conductive foreign matter generated by the operation of the switch from accumulating in the high electric field part, the lower part is opened, and the moving directions of the plurality of main circuits are attached to the sealed container 10 with substantially the same outer shape as the moving direction of the main circuit. The U-shaped insulating holder 11 is housed in a U-shaped insulating holder 11 made of a solid insulating material such as an epoxy resin having a mounting hole in which the side of the device mounting plate 6 is slightly widened with respect to the central axis perpendicular to the center axis. It is held by mounting brackets 11a and 11b that are buried or penetrate the upper surface.

(C3) The fixed terminals 2 and 3 include a fixed terminal tip portion 21 into which the movable conductor 4 is inserted and directly electrically connected to the movable conductor 4, and a mounting bracket embedded in the insulating holder 11 or penetrating through the upper surface of the insulating holder 11. 11a and 11b are divided into fixed parts 22 for fixing the fixed terminal tip part 21.

(C4) The U-shaped insulating holder 11 whose bottom is opened protrudes from the main circuit terminal farthest from the device mounting plate 6 away from the device mounting plate 6, and the inner upper surface 11d of the insulating holder 11 is a substantially horizontal plane. The inner hanging portion 11e has a slope of about 0.5 ° to 5 ° with respect to a vertical plane, and is a plane protruding downward from the lowermost surface of the main circuit terminal. The inner upper surface 11g and the inner hanging portion 11e are It is via a curved surface portion larger than R2 in contact with the inner upper surface 11g and the inner hanging portion 11e.
Further, the outer upper surface 11g of the U-shaped insulating holder 11 opened downward is a plane or a plane slightly inclined from the center of the insulating holder 11 toward the outer side sag on both sides, and the outer sag portion 11h is the inner side sag. The outer upper surface 11g and the suspended portion 11h are the same curved surface as the portion 11e or smaller than the surface perpendicular to the inner hanging portion 11e, and the outer upper surface 11g and the hanging portion 11h are curved surfaces larger than R2 in contact with the outer upper surface 11g and the hanging portion 11h. 11j.

(C5) Between the opposing main circuit terminals on the inner surface of the U-shaped insulating holder 11 for storing and holding the main circuit terminals, perpendicular to the movable direction of the main circuit movable conductor, and in the case of DS, with respect to the center of the opposing fixed terminal In the case of ES, the downward U-shape larger than the outer shape of the movable conductor 4 is lacking at the center of the opposing fixed terminal or the position close to the main circuit side terminal so that the distance from the fixed terminal is approximately equal. A ridge 11k is provided, and the lower portion of the portion lacking in the central U-shape of the ridge 11k is widened.

(C6) The hanging portion tip 11n of the U-shaped insulating holder 11 that houses and holds the main circuit terminal is refracted inward.

(C7) The central portion of the U-shaped insulating holder 11 for storing and holding the main circuit terminal is movable between the opposing main circuit terminals so that the central portion is inclined from a plane perpendicular to the movable direction of the main circuit movable conductor 4. A flange 11p lacking in a U-shape that extends downward downward larger than the outer shape of 4 is provided, and this flange 11p continues to the hanging part tip 11n of the insulating holder 11 and the hanging part outer surface 11h of the insulating holder 11 When the holders 11 are arranged on the device mounting plate 6 at almost equal intervals, the flanges 11p on the outer surface of the insulating holder 11 do not interfere with each other.

(C8) The U-shaped insulating holder 11 that stores and holds the main circuit terminal is electrically connected to the mounting brackets 11a and 11b that are embedded in the insulating holder 11 or penetrate the insulating holder. An electric field relaxation shield refracted in a U-shape so as to be almost at the center of the hanging part of the holder is embedded in a solid insulator near the end of the main circuit terminal fixed to a mounting bracket electrically connected to the electric field relaxation shield. .

(C9) The tip of the fixed terminal is tapered and tapered, a V-shaped groove is provided on the circumference at a position near the center from the taper portion of the fixed terminal, and the electric field of the solid terminal portion is provided around the tip of the fixed terminal. An electric field relaxation shield is provided, and a hole larger than the outer shape of the fixed terminal is provided at the center of the electric field relaxation shield, and a coil shape for holding the electric field relaxation shield by a groove of the fixed terminal on the circumference inside the hole. A groove deeper than the outer diameter of the coil of the spring wound in a ring is provided, and the spring is provided in the groove formed in the V-shaped groove of the fixed terminal and the hole portion of the electric field relaxation shield to hold the electric field relaxation shield .

(C10) A male screw threaded around the hole into which the movable conductor 4 at the center of the fixed terminals 2 and 3 is inserted and screwed into the female screw at the tip of the solid terminals 2 and 3 Manufactured using a solid insulator such as an epoxy resin having a through hole larger than the outer shape of the movable conductor 4 in the center and having a flange that curves in the direction opposite to the terminal facing the periphery of the through hole. An insulated barrier 12 is provided.

It is the side view and end view which show the structure in Embodiment 1 by this invention. It is the side view and end elevation which show the structure in Embodiment 2 by this invention. It is the bottom view and end view which show the structure in Embodiment 3 by this invention. It is the bottom view and end view which show the structure in Embodiment 4 by this invention. It is the bottom view and end view which show the structure in Embodiment 5 by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed terminal, 1a Movable conductor insertion hole, 2 Fixed terminal, 2a Movable conductor insertion hole, 2b Recessed part, 2c Solid terminal bottom surface, 2d Female screw part, 21 Fixed terminal tip part, 22 Fixed terminal fixed part, 3 Fixed terminal, 3a Movable conductor insertion hole, 3b Bottom surface of solid terminal, 3c Female thread part, 4 Movable conductor, 4a Groove part for contactor, 4b Convex part, 5 Contactor, 6 Equipment mounting plate, 7 Drive shaft, 8 Insulating rod, 9 Screw rod, 10 Airtight container, 10a Airtight container opening, 11 U-shaped insulation holder, 11a Fixed terminal mounting bracket, 11b Fixed terminal mounting bracket, 11c Mounting hole, 11d Inner upper surface of insulating holder, 11e Inner hanging surface of insulating holder 11f Inside curved surface of the insulating holder, 11g Outside top surface of the insulating holder, 11h Outside hanging surface of the insulating holder, 11j Insulating holder Outer curved surface, 11k Insulation holder collar, 11m Insulation holder collar notch, 11n Insulation holder hanging part, 11p Insulation holder collar, 12 Insulation barrier, 12a Insulation barrier male thread, 12b Insulation barrier Through-hole, 12c Curved buttocks of insulation barrier.

Claims (4)

A gas-insulated switchgear in which a plurality of switchgear elements having at least one of a disconnecting function and a grounding function and arranged in parallel as a multiphase configuration are housed in a conductive container sealed with an insulating gas and grounded. A first fixed terminal provided on the switchgear element, a second fixed terminal provided on the switchgear element and constituting a first open / close object with the first fixed terminal, and provided on the switchgear element. A third fixed terminal constituting a second opening / closing object between the two fixed terminals, provided in the opening / closing device element, extending in a predetermined axial direction extending in a horizontal direction and movably arranged in the axial direction A first electrical terminal to be opened and closed configured by the first fixed terminal and the second fixed terminal, and a second configured by the second fixed terminal and the third fixed terminal. Open and close electrical connections to be opened and closed The first, second and third fixed terminals and the upper surface portion covering the upper surface of the conductive mover, and the first, second and third An insulating member having a fixed terminal and a pair of side surfaces covering the side surface of the conductive movable element, and an upper surface portion of the insulating member and an inner surface of the side surface portion between the first and second fixed terminals. Protruding toward the facing space and providing a flange having a notched portion having an inverted U-shaped contour in the facing space between the first and second fixed terminals, and extending the notched portion of the flange downward Gas-insulated switchgear characterized by its shape . On the inner surface of the upper surface portion and the side surface portion of the insulating member, it protrudes toward the opposing space between the first and second fixed terminals, and is inverted U-shaped in the opposing space between the first and second fixed terminals. Providing a flange portion having a notched portion having an outline of the shape, and forming the notched portion of the flange portion to expand downward, and providing a protrusion projecting outward from the side surface portion of the insulating member on the flange portion, 2. The gas insulated switchgear according to claim 1 , wherein the protrusions are arranged at different positions so that the protrusions do not interfere with the protrusions of the adjacent switchgear element. It said first, side portion lower edge of the second and third fixed terminal and the insulating member for accommodating the conductive movable element, according to claim 1 or claim 2, characterized in that it is bent inward Gas-insulated switchgear. An insulating barrier around the fixing pin having a central opening mover is inserted is provided, it claims 1 to 3, characterized in that said insulating barrier attached detachably to the central opening of the fixed terminal A gas insulated switchgear according to any one of the above.

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