Gas insulated switchgear

Abstract

To provide a gas insulated switchgear which can suppress deterioration of insulation performance of an insulation spacer.SOLUTION: A switching part 12 switches energization by moving a contact 38 provided at one of a first contact piece 30 and a second contact piece 31 in a horizontal direction of a housing to contact or not to contact the other of the first contact piece 30 and the second contact piece 31. A sectioning part 20 sections a second container 19 which accommodates the switching part 12 and a first container 18 loaded with the second container 19. An insulation spacer 29 is attached to the sectioning part 20 to insulate a conductor 48 of the first contact piece 30 arranged in the sectioning part 20 from the sectioning part 20. The sectioning part 20 has a foreign matter accommodation part 54 which accommodates a foreign matter existing inside the second container 19 at a lower part of at least a part of an area in which the contact 38 moves between the first contact piece 30 and the second contact piece 31.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a gas-insulated switchgear. [Background technology]

[0002] Conventionally, as disclosed in Patent Document 1, a gas-insulated switchgear in which a power receiving unit and a transformer unit are integrated is well known. This gas-insulated switchgear has, for example, a three-stage structure in which a power receiving unit container, a bus container, and a transformer unit container are arranged in this order from the bottom. Conductors electrically connecting the power receiving unit container and the bus container are insulated by an insulating spacer that separates these containers. Similarly, conductors connecting the bus container and the transformer unit are also insulated by an insulating spacer that separates these containers. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-109697 A Summary of the Invention [Problem to be solved by the invention]

[0004] Gas-insulated switchgear is provided with a disconnector that opens and closes an electric circuit when there is no load. There is a sliding type disconnector in which a movable contactor comes into sliding contact with a fixed contactor to close a circuit. In the case of this sliding type, the metal on the surface may peel off due to the sliding between the contactors, and this may become a metallic foreign object inside the container. If this metallic foreign object falls onto the insulating spacer, there is a possibility that the insulation performance will not be satisfactory. [Means for solving the problem]

[0005] The gas-insulated switchgear that solves the above-mentioned problem is a device in which an insulating gas is filled inside a housing and power is relayed via a path arranged in an atmosphere of the insulating gas, and the device comprises an opening / closing unit that opens and closes the flow of electricity by moving a contact provided on one of a first contactor and a second contactor in the horizontal direction of the housing to bring the contact into contact with or out of contact with the other of the first contactor and the second contactor, a partition section that separates a second container that houses the opening / closing unit from a first container on which the second container is placed, and an insulating spacer attached to the partition section to insulate the conductor of the first contactor arranged in the partition section from the partition section, and the partition section has a foreign object storage section that stores foreign object present inside the second container, below at least a portion of the area where the contact moves between the first contactor and the second contactor.

[0006] According to this configuration, if any foreign matter generated during sliding of the contact falls, the foreign matter is accommodated in the foreign matter accommodation portion, so that it is possible to prevent the foreign matter from falling onto the insulating spacer. Therefore, it is possible to prevent the situation in which the opening / closing portion and the partition portion are electrically connected by the foreign matter on the insulating spacer. Therefore, it is possible to suppress deterioration of the insulating performance of the insulating spacer. Effect of the Invention

[0007] The present invention can suppress deterioration of the insulating performance of the insulating spacer. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a gas-insulated switchgear according to an embodiment. [Diagram 2] FIG. 1 is a schematic diagram showing a configuration of a gas-insulated switchgear. [Diagram 3] FIG. 4 is a cross-sectional view showing the opening / closing part in an open state. [Figure 4] FIG. 4 is a cross-sectional view showing the opening / closing part in a closed state. [Diagram 5] 4 is a cross-sectional view taken along line VV shown in FIG. [Figure 6] FIG. 4 is an enlarged cross-sectional view of the opening / closing portion in a closed state. [Figure 7] 13 is a cross-sectional view showing a configuration of a foreign matter storage section according to another embodiment of the present invention. [Figure 8] FIG. 11 is a cross-sectional view showing a configuration of a foreign matter storage unit according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, one embodiment of the present disclosure will be described. (Gas insulated switchgear 1) As shown in Fig. 1, the gas-insulated switchgear 1 includes an MOF (instrument current transformer) unit 2, a pair of power receiving transformer units 3, and an operation panel 4. The gas-insulated switchgear 1 has a housing 5 filled with insulating gas. For example, SF6 (sulfur hexafluoride) is used as the insulating gas. The gas-insulated switchgear 1 relays electric power via a path arranged in an atmosphere of the insulating gas. The gas-insulated switchgear 1 is operated by an operator via the operation panel 4.

[0010] The receiving transformer unit 3 is a unit that integrates power receiving and transformer functions. Of the pair of receiving transformer units 3, one is for regular use and the other is for standby. The MOF unit 2 is placed between the pair of receiving transformer units 3. The MOF unit 2 measures the amount of power to be relayed. An operation panel 4 corresponding to each of the receiving transformer units 3 is placed in front of the gas-insulated switchgear 1.

[0011] (Receiving transformer unit 3) As shown in Figure 2, the power receiving transformer unit 3 has a structure in which a power receiving mechanism 8 and a transformer mechanism 9 are stacked vertically, with a connection mechanism 7 connected to the MOF unit 2 disposed in the middle. In this example, the power receiving mechanism 8 is disposed on the lower side, and the transformer mechanism 9 is disposed on the upper side. In this way, the power receiving transformer unit 3 of this example has a multi-stage structure (a three-stage structure in this example) in which the power receiving mechanism 8, connection mechanism 7, and transformer mechanism 9 are stacked from the bottom up.

[0012] The power receiving mechanism 8 includes a current transformer CT, a cable head CHD, a lightning arrester LA, a disconnector DS1, a grounding switch ES1, a circuit breaker GCB1, and a grounding switch ES2. The cable head CHD is provided at the tip of the external cable 10 and is connected to the circuit breaker DS1. The current transformer CT measures the current flowing through the external cable 10. The lightning arrester LA protects the power receiving transformer unit 3 from abnormal voltage when an abnormal voltage is input from the cable head CHD to the power receiving transformer unit 3. The circuit breaker DS1 opens and closes the path that relays power in the power receiving mechanism 8. The earthing switch ES1 grounds the path that relays power in the path of the disconnector DS1. The circuit breaker GCB1 inputs and cuts off the current in the power receiving mechanism 8. The earthing switch ES2 grounds both ends of the circuit breaker GCB1 by closing it during inspection of the circuit breaker GCB1.

[0013] The connection mechanism 7 includes a bus BUS and a switching unit 12. The switching unit 12 in this example includes a first switching unit 13 that opens and closes the input side of the bus BUS, and a second switching unit 14 that opens and closes the output side of the bus BUS. The first switching unit 13 and the second switching unit 14 are, for example, disconnectors that open and close a path that relays power in the connection mechanism 7.

[0014] The bus BUS is composed of a two-way bus connected to the MOF unit 2. One end of the outbound path of the bus BUS is connected to the first opening / closing unit 13, and the other end is connected to the MOF unit 2. One end of the return path of the bus BUS is connected to the second opening / closing unit 14, and the other end is connected to the MOF unit 2. When the first opening / closing unit 13 is in the closed state, the power receiving mechanism 8 is connected to the MOF unit 2, and the power input by the power receiving mechanism 8 is transmitted to the MOF unit 2. When the second opening / closing unit 14 is in the closed state, the transformer mechanism 9 is connected to the MOF unit 2, and the power from the MOF unit 2 is supplied to the transformer mechanism 9.

[0015] The transformer mechanism 9 includes a circuit breaker GCB2, an earthing switch ES3, and a transformer connection unit 15. The circuit breaker GCB2 turns on or off a current in the transformer mechanism 9. The earthing switch ES3 is closed during inspection of the circuit breaker GCB2 to earth both ends of the circuit breaker GCB2. A predetermined transformer (not shown) is connected to the transformer connection unit 15.

[0016] (Containment structure of gas-insulated switchgear 1) As shown in Fig. 2, the gas insulated switchgear 1 includes a first container 18 constituting a lower container of the housing 5 having a multi-stage structure, and a second container 19 placed on the first container 18. The first container 18 in this example houses, for example, components of the power receiving mechanism 8. The first container 18 in this example houses, for example, a lightning arrester LA, a disconnector DS1, a grounding switch ES1, a circuit breaker GCB1, and a grounding switch ES2. The first container 18 can also be said to be a circuit breaker container that houses the circuit breaker GCB1 on the power receiving side. Both the first container 18 and the second container 19 are made of metal.

[0017] The second container 19 in this example houses, for example, the opening / closing units 12 on both sides of the outgoing path of the bus BUS. In this way, the second container 19 in this example houses the components of the connection mechanism 7. The second container 19 in this example houses a part of the bus BUS and the opening / closing units 12. The second container 19 can also be said to be a bus container that houses the bus BUS.

[0018] The gas-insulated switchgear 1 includes a partition section 20 (hereinafter referred to as a first partition section 21) that separates a second container 19 that houses the switching section 12 from a first container 18 on which the second container 19 is placed. The first partition section 21 is, for example, an adapter flange. The first partition section 21 is formed in a plate shape when viewed from the side. The material of the first partition section 21 is, for example, a metal. The first partition section 21 seals an accommodation chamber 22 of the first container 18 and an accommodation chamber 23 of the second container 19.

[0019] The gas-insulated switchgear 1 includes a third container 24 placed on the second container 19. The third container 24 in this example houses, for example, components of the transformer mechanism 9. The third container 24 in this example houses a circuit breaker GCB2 that is different from the circuit breaker GCB1 in the first container 18. The third container 24 is made of, for example, metal. The transformer connection portion 15 is attached to the side of the third container 24.

[0020] The gas-insulated switchgear 1 includes a partition 20 (hereinafter, referred to as a second partition 26) that partitions the accommodation chamber 23 of the second container 19 and the accommodation chamber 25 of the third container 24. The second partition 26 is, for example, an adapter flange. The second partition 26 is formed in a plate shape when viewed from the side. The material of the second partition 26 is, for example, a metal. The interiors of the accommodation chambers 22, 23, 25 and the transformer connection portion 15 are each filled with an insulating gas.

[0021] (Opening and closing part 12) 3 and 4, the opening / closing unit 12 has a first contactor 30 attached to an insulating spacer 29 that insulates the power path in the housing 5 from the partition unit 20, and a second contactor 31 that pairs with the first contactor 30. In this example, the first contactor 30 is a fixed contactor, and the second contactor 31 is a movable contactor.

[0022] The first contactor 30 has, for example, a main body 32 and a fixed contact portion 33 provided at the tip of the main body 32. The main body 32 has a head 32a to which the fixed contact portion 33 is attached, and a leg portion 32b that supports the head 32a at a position closer to the base end of the head 32a. The first contactor 30 stands on the insulating spacer 29 by the leg portion 32b. The fixed contact portion 33 is, for example, formed in a substantially cap-like shape having a hole 34 in the center, and is disposed such that an axis L1 of the hole 34 is oriented along the horizontal direction (the X-axis direction in FIG. 3, etc.). An elastic body 35 for fixing the fixed contact portion 33 to the main body 32 is attached inside the fixed contact portion 33. The elastic body 35 is, for example, a spring.

[0023] The second contactor 31 has, for example, a contact 38 that moves linearly to approach or move away from the first contactor 30, a support base 39 arranged on the upper surface of the first partition 21, a rod 40 that is coaxially and integrally fixed to the contact 38, and a sliding portion 41 on which the linearly moving contact 38 slides. A conductor 42 that serves as a path of power to the downstream side of the second contactor 31 is sandwiched between the support base 39 and the sliding portion 41. The support base 39 is formed of an insulating material to insulate the second contactor 31 from the first partition 21. The second contactor 31 has a hole 43 for inserting the rod 40. The hole 43 is formed so that an axis L2 of the hole 43 extends horizontally (the X-axis direction in FIG. 3, etc.).

[0024] The sliding portion 41 has an outer dome-shaped first sliding piece 44 and a second sliding piece 45 arranged inside the first sliding piece 44. The second sliding piece 45 is a seat for mounting the first sliding piece 44. An elastic body 47 for fixing the first sliding piece 44 to the second sliding piece 45 is attached inside the first sliding piece 44. The elastic body 47 is, for example, a spring. A hole 43 for inserting the contact 38 and the rod 40 in the second contactor 31 is formed across the support base 39, the first sliding piece 44 and the second sliding piece 45.

[0025] The rod 40 is, for example, arranged sideways, so as to extend in the horizontal direction (X-axis direction in FIG. 3, etc.). The rod 40 has the contact 38 attached to its tip, and an operating mechanism 46 that moves the rod 40 linearly back and forth is connected to its base end. The contact 38 and the rod 40 are linearly moved horizontally by the operating mechanism 46, thereby opening and closing the opening / closing unit 12. In this way, the opening / closing unit 12 opens and closes the current by moving the contact 38 in the horizontal direction of the housing 5 (X-axis direction in FIG. 3, etc.) to bring it into contact with or out of contact with the first contactor 30.

[0026] The switching section 12 is arranged such that, when the switching section 12 is viewed from the side, the contacts 38 take a path that crosses the central axis C1 of the first partition 21. Viewing the switching section 12 from the side means, for example, viewing the gas-insulated switchgear 1, which has a front-to-rear arrangement direction, from the side. The central axis C1 is an axis located in the center of the first partition 21, for example, in the front-to-rear direction of the gas-insulated switchgear 1.

[0027] The opening and closing of the opening / closing unit 12 is switched by an operating mechanism 46 installed on the operation panel 4. When the opening / closing unit 12 is closed, the operating mechanism 46 moves the rod 40 linearly in a direction approaching the first contactor 30 (the direction of the arrow A1 in FIG. 3). When the tip of the contact 38 enters the hole 34 of the first contactor 30 and touches the fixed contact portion 33, the opening / closing unit 12 is in a closed state (the state in FIG. 4). On the other hand, when the opening / closing unit 12 is opened, the operating mechanism 46 moves the rod 40 linearly in a direction away from the first contactor 30 (the direction of the arrow A2 in FIG. 4). When the tip of the contact 38 leaves the hole 34 and returns to the original retracted state, the opening / closing unit 12 is in an open state (the state in FIG. 3).

[0028] (Three-phase integrated structure) As shown in Fig. 5, the gas-insulated switchgear 1 uses a three-phase integrated power relay system in which one phase flows through each of three paths that relay power. For this reason, a switching unit 12 is provided for each phase. Specifically, a total of three switching units 12 are provided for each of the U-phase, V-phase, and W-phase. The U-phase switching unit 12a, the V-phase switching unit 12b, and the W-phase switching unit 12c are arranged side by side in the width direction (Y-axis direction in Fig. 5) of the gas-insulated switchgear 1 (housing 5).

[0029] (insulating spacer 29) As shown in FIG. 2, the insulating spacer 29 includes a first insulating spacer 29a that insulates the power path between the first container 18 and the second container 19 from the first compartment 21, and a second insulating spacer 29b that insulates the power path between the second container 19 and the third container 24 from the second compartment 26.

[0030] 3 and 4, the insulating spacer 29 is attached to the partition 20 to insulate the conductor 48 of the first contact 30 arranged in the partition 20 from the partition 20. The insulating spacer 29 is attached and fixed to an opening 49 formed in the partition 20. The insulating spacer 29 is attached and fixed to the periphery of the opening 49 so as to be exposed to the inside of the second container 19 from the opening 49.

[0031] The insulating spacer 29 has a conductor insertion portion 50 through which the conductor 48 extending from the first contact 30 in the vertical direction (Z-axis direction in FIG. 3, etc.) is inserted, and a flange portion 51 integrally formed around the conductor insertion portion 50. The insulating spacer 29 is formed of an insulating material such as epoxy resin. The insulating spacer 29 is arranged sideways with respect to the housing 5. That is, the insulating spacer 29 is arranged horizontally with the axis of a hole 52 for inserting the conductor 48 perpendicular to the plane of the partitioning portion 20. The first insulating spacer 29a is fixed so that the upper surface of the flange portion 51 abuts against the rear surface of the first partitioning portion 21.

[0032] The conductor insertion portion 50 is formed with a bulging shape on both the upper and lower surfaces, and a plurality of conductor insertion portions 50 are provided for each first contactor 30. The conductor insertion portion 50 is attached to the partition portion 20 such that one of the bulging portions on the upper and lower surfaces is disposed within the opening 49. A hole 52 formed in the conductor insertion portion 50 penetrates in the vertical direction (the Z-axis direction in FIG. 3, etc.). One end of the conductor 48 of the insulating spacer 29 fixed to the first partition portion 21 is connected to the main body portion 32 of the first contactor 30, and the other end is connected to the circuit breaker GCB1 of the power receiving mechanism 8.

[0033] The insulating spacer 29 is disposed at a position offset in the movement direction of the contact 38 (the direction of arrow A1 in FIG. 3 and the direction of arrow A2 in FIG. 4) with respect to the central axis C1 of the partitioning portion 20. Specifically, the insulating spacer 29 is disposed at a position shifted by a predetermined amount radially outward from the central axis C1 shown in FIG.

[0034] 5, the insulating spacer 29 is configured as one component that insulates the multiple opening / closing sections 12 from the partition section 20. The conductor insertion section 50 in this example has, for example, a first conductor insertion section 50a for mounting the first contactor 30 of the U-phase opening / closing section 12a, a second conductor insertion section 50b for mounting the first contactor 30 of the V-phase opening / closing section 12b, and a third conductor insertion section 50c for mounting the first contactor 30 of the W-phase opening / closing section 12c. The first conductor insertion section 50a to the third conductor insertion section 50c are arranged in a line in a direction perpendicular to the moving direction of the contact 38.

[0035] (Foreign matter storage section 54) 3 and 4, the partition 20 (first partition 21 in this example) has a foreign object storage section 54 that stores foreign objects present inside the second container 19. In this way, the gas-insulated switchgear 1 of this example has the foreign object storage section 54 in the partition 20. The foreign objects are, for example, metallic foreign objects that are generated when the contacts 38 slide against the first contactor 30. The metallic foreign objects are, for example, metal pieces that have peeled off from the contacts 38 or the first contactor 30. The foreign objects also include, for example, arc products and dust that has entered the container during operation.

[0036] The foreign matter storage section 54 stores foreign matter present inside the second container 19 below at least a part of the area (hereinafter referred to as the movement area Ea) where the contact 38 moves between the first contactor 30 and the second contactor 31. The foreign matter storage section 54 is, for example, a groove 55 formed in the upper surface of the partition section 20. The groove 55 is preferably formed, for example, in a tapered shape such that the groove depth R3 is deepest at the center.

[0037] 2, it is preferable that the foreign object storage section 54 stores foreign objects below the first opening / closing section 13 and the second opening / closing section 14. That is, one foreign object storage section 54 stores foreign objects generated in both the first opening / closing section 13 and the second opening / closing section 14.

[0038] 5, the foreign object storage section 54 is formed, for example, in a shape that surrounds at least a part of the periphery of the insulating spacer 29 along the opening 49. In this example, the foreign object storage section 54 is preferably formed, for example, in a substantially semicircular arc shape (substantially C-shaped) in a plan view. In this manner, one foreign object storage section 54 stores foreign objects from multiple opening / closing sections 12.

[0039] (Operation of the embodiment) Next, the operation of the gas-insulated switchgear 1 of this embodiment will be described. As shown in FIG. 4, when the contact 38 slides over the first contactor 30 and the second contactor 31 during the opening and closing operation of the opening / closing unit 12, the surface may peel off and foreign matter (metallic foreign matter) may be generated. The foreign matter falls under its own weight and accumulates on the bottom. For example, if the foreign matter accumulates on the insulating spacer 29, an electric field may be generated between the opening / closing unit 12 and the partitioning unit 20 through the foreign matter as a medium, which may hinder the insulation performance. In addition, if foreign matter larger than a certain size is left accumulated, for example, when a lightning surge occurs, the foreign matter may stand up or float due to the induction phenomenon of the lightning surge, which may hinder the insulation performance of the opening / closing unit 12.

[0040] Therefore, in this embodiment, a foreign object storage section 54 is provided on the upper surface of the partition section 20 below at least a part of the movement area Ea of the contact 38. Therefore, even if foreign objects are generated when the contact 38 slides over the first contactor 30 or the second contactor 31, the foreign objects falling downward can be stored in the foreign object storage section 54. This makes it difficult for the foreign objects to reach the insulating spacer 29, making it possible to prevent deterioration of the insulating performance of the opening / closing section 12.

[0041] When the foreign object storage portion 54 is a groove 55, the parameters of the groove shape include, for example, "groove length R1 (see FIG. 3)," "groove width R2 (see FIG. 5)," and "groove depth R3 (see FIG. 3)." The groove length R1 is preferably set to a value equal to or greater than the arrangement interval between the first contactor 30 and the second contactor 31 (equivalent to the moving area Ea in this example). The groove width R2 is preferably set to a value equal to or greater than the width Ka of the contact 38. The groove depth R3 is preferably set to a value equal to or greater than half the length of an expected foreign object, for example.

[0042] 6, when the foreign object storage section 54 is a groove 55, the inner surface of the groove 55 is preferably treated to suppress the charge of the foreign object. Specifically, the foreign object storage section 54 preferably has, on at least a part of the inner surface of the groove 55, a conductive member 57 that suppresses the charge of the foreign object. The conductive member 57 is preferably, for example, a conductive paint 57a. The conductive paint 57a may be, for example, carbon or aluminum. The conductive member 57 may be, for example, a plating layer.

[0043] Furthermore, the gas-insulated switchgear 1 of this embodiment has a structure in which the switching unit 12 is disposed on or near the central axis C1 of the partition 20. In this case, the switching unit 12 can be disposed closer to the center of the partition 20, which allows the gas-insulated switchgear 1 to be miniaturized. In addition, in this embodiment, the insulating spacer 29 is disposed offset from the central axis C1 of the partition 20, and a foreign object storage section 54 is provided below the moving area Ea of the contact 38. This makes it possible to store foreign objects generated when the contact 38 slides in the foreign object storage section 54. As a result, it is possible to achieve both miniaturization of the gas-insulated switchgear 1 and capture of foreign objects.

[0044] (Effects of the embodiment) According to the configuration of the above embodiment, the following effects can be obtained. (1) In the gas-insulated switchgear 1, the inside of the housing 5 is filled with insulating gas, and electric power is relayed through a path arranged in an atmosphere of the insulating gas. The gas-insulated switchgear 1 includes a switching unit 12, a partitioning unit 20, and an insulating spacer 29. The switching unit 12 switches current by moving a contact 38 provided on one of the first contactor 30 and the second contactor 31 in the horizontal direction of the housing 5 to make contact with or not make contact with the other of the first contactor 30 and the second contactor 31. The partitioning unit 20 separates the second container 19 that houses the switching unit 12 from the first container 18 on which the second container 19 is placed. The insulating spacer 29 is attached to the partitioning unit 20 to insulate the conductor 48 of the first contactor 30 arranged in the partitioning unit 20 from the partitioning unit 20. The partition section 20 has a foreign matter storage section 54 for storing foreign matter present inside the second container 19, below at least a portion of the area (movement area Ea) in which the contact 38 moves between the first contact 30 and the second contact 31.

[0045] According to this configuration, if any foreign matter generated during sliding of the contact 38 falls, the foreign matter is accommodated in the foreign matter accommodation portion 54, so that it is possible to prevent the foreign matter from falling onto the insulating spacer 29. This makes it possible to prevent the situation in which the opening / closing portion 12 and the partition portion 20 are electrically connected due to the foreign matter on the insulating spacer 29. This makes it possible to suppress deterioration of the insulating performance of the insulating spacer 29.

[0046] (2) The power relay system of the gas-insulated switchgear 1 is a three-phase integrated type in which one phase flows through each of three paths that relay power. A switching unit 12 is provided for each phase. The insulating spacer 29 is configured as a single component that insulates the multiple switching units 12 from the partition unit 20. With this configuration, foreign matter that may be generated from each switching unit 12 can be collectively contained in the foreign matter container 54 provided in one insulating spacer 29.

[0047] (3) The housing 5 has a multi-stage structure in which a second container 19 is placed on a first container 18 accommodating a circuit breaker GCB1, and a third container 24 accommodating another circuit breaker GCB2 is placed on the second container 19. With this configuration, deterioration of the insulating performance of the insulating spacer 29 can be suppressed in the gas insulated switchgear 1 having a multi-stage structure.

[0048] (4) The opening / closing unit 12 includes a first opening / closing unit 13 that opens and closes the input side of the bus BUS housed in the second container 19, and a second opening / closing unit 14 that opens and closes the output side of the bus BUS. The foreign object storage unit 54 stores foreign objects below the first opening / closing unit 13 and the second opening / closing unit 14. According to this configuration, foreign objects that may be generated from each of the first opening / closing unit 13 and the second opening / closing unit 14 can be stored collectively in the single foreign object storage unit 54.

[0049] (5) The opening / closing unit 12 is arranged so that the contact 38 takes a path that crosses the central axis C1 of the partitioning unit 20 when the opening / closing unit 12 is viewed from the side. The insulating spacer 29 is arranged at a position offset from the central axis C1 in the moving direction of the contact 38. According to this configuration, if the opening / closing unit 12 is arranged so that the contact 38 takes a path that crosses the central axis C1 of the partitioning unit 20, the opening / closing unit 12 is arranged near the center of the partitioning unit 20. In this way, if the opening / closing unit 12 is arranged near the center of the partitioning unit 20, the radial size of the partitioning unit 20 and therefore the gas-insulated switchgear 1 (housing 5) can be reduced in size. Furthermore, for the gas-insulated switchgear 1 thus miniaturized, the opening / closing unit 12 is arranged at a position offset from the central axis C1 of the partitioning unit 20, and a foreign object storage unit 54 is provided in the area generated by the offset to store foreign objects. Therefore, it is possible to suppress deterioration of the insulation performance of the insulating spacer 29 and to reduce the size of the gas-insulated switchgear 1 at the same time.

[0050] (6) The partition 20 has an opening 49 that exposes the insulating spacer 29 attached to the partition 20 to the inside of the second container 19. The foreign matter storage section 54 is formed in a shape that surrounds at least a part of the periphery of the insulating spacer 29 along the opening 49. With this configuration, the foreign matter storage section 54 can be formed over a wide range along the periphery of the insulating spacer 29, so that a larger amount of foreign matter can be stored in the foreign matter storage section 54.

[0051] (7) The foreign matter storage section 54 is a groove 55 formed in the upper surface of the partition section 20. According to this configuration, the foreign matter storage section 54 can be provided in the partition section 20 by the simple method of forming the groove 55 in the partition section 20.

[0052] (8) The foreign object storage section 54 has a conductive member 57 on at least a part of the inner surface of the groove 55. With this configuration, even if an electric charge adheres to the foreign object stored in the foreign object storage section 54, the electric charge can be grounded by the conductive member 57. This makes it difficult for the foreign object stored in the foreign object storage section 54 to become charged, which further contributes to ensuring the insulation performance of the opening / closing section 12. In addition, even if a lightning surge or opening / closing surge enters the circuit, the electric charge received by the foreign object can be reduced.

[0053] (9) The conductive member 57 is a conductive paint 57a. According to this configuration, the conductive member 57 can be provided on the inner surface of the groove 55 by the simple configuration of applying paint to the inner surface of the groove 55.

[0054] (Other embodiments) This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that no technical contradiction occurs.

[0055] 7, the conductive member 57 may be a metal net 57b. In this case, the foreign matter captured by the metal net 57b can be firmly retained in the metal net 57b. Therefore, the metal net 57b can prevent the foreign matter accommodated in the foreign matter accommodation unit 54 from escaping from the foreign matter accommodation unit 54. Note that the metal net 57b is preferably made of, for example, stainless steel or copper.

[0056] 8, the conductive member 57 may be a conductive metal plate 57c. In this case, the conductive member 57 can have a simple configuration of a metal plate material. The insulating spacer 29 does not necessarily have to be shared by a plurality of opening / closing units 12, but may be provided individually for each opening / closing unit 12.

[0057] The planar shape of the insulating spacer 29 is not limited to a perfect circle, but may be, for example, an ellipse or a rectangle. The foreign object storage section 54 does not necessarily have to be shared by a plurality of opening / closing sections 12, but may be provided individually for each opening / closing section 12.

[0058] The foreign matter storage portion 54 is not limited to being formed with a size corresponding to the entire movement area Ea of the contact 38. The foreign matter storage portion 54 may have a size corresponding to at least a part of the movement area Ea. Furthermore, the foreign matter storage portion 54 may be formed larger than the movement area Ea.

[0059] The foreign object storage section 54 is not limited to the groove 55, and may be formed, for example, by another member disposed on the upper surface of the partition section 20. In this way, the foreign object storage section 54 may be anything that can capture foreign objects.

[0060] The second container 19 may be configured such that the second opening / closing unit 14 is omitted and only the first opening / closing unit 13 is provided. The position of the opening / closing section 12 in the partition section 20 is not limited to a position close to the central axis C1, and may be a position away from the central axis C1.

[0061] · The insulating gas may be a gas other than SF6. The first contact 30 may be the movable side and the second contact 31 may be the fixed side. The first container 18 is not limited to the container of the power receiving mechanism 8, but may be the container of another mechanism.

[0062] The second container 19 is not limited to the container of the connection mechanism 7, but may be a container of another mechanism. The gas-insulated switchgear 1 is not limited to a three-stage structure, and may be, for example, a two-stage structure. As an example of this, for example, the third vessel 24 in the third stage may be omitted, and the transformer connection portion 15 may be connected to the second vessel 19 in the second stage.

[0063] The gas-insulated switchgear 1 is not limited to a three-phase integrated type, and may be a device that relays power in only one system. The gas insulated switchgear 1 is not limited to a cable retraction type as in the embodiment, but may be, for example, a bushing retraction type.

[0064] Although the present disclosure has been described with reference to the embodiment, it is understood that the present disclosure is not limited to the embodiment or structure. The present disclosure also includes various modifications and modifications within the scope of equivalents. In addition, various combinations and forms, as well as other combinations and forms including only one element, more than one element, or less than one element, are also within the scope and concept of the present disclosure. [Explanation of symbols]

[0065] 1...Gas-insulated switchgear 5. Housing 12...Opening and closing section 13…First opening and closing section 14…Second opening and closing section 18...1st container 19…Second container 20…Partition 24…Third container 29…Insulating spacer 30…First contact 31...Second contact 38…Contact 49...Aperture 54…Foreign object storage section 55...Groove 57...Conductive material Ea…Moving area GCB1…Circuit breaker GCB2…Circuit breaker BUS…Busbar C1…Central axis

Claims

1. A gas-insulated switchgear in which an insulating gas is filled inside a housing and electric power is relayed through a path disposed in an atmosphere of the insulating gas, an opening / closing unit that opens and closes electrical current by moving a contact provided on one of a first contactor and a second contactor in a horizontal direction of the housing to bring the contactor into contact with or out of contact with the other of the first contactor and the second contactor; a partition section that separates a second container that houses the opening / closing section from a first container on which the second container is placed; an insulating spacer attached to the partition for insulating a conductor of the first contact arranged in the partition from the partition; the partition portion has a foreign object accommodating portion that accommodates foreign object present inside the second container, below at least a portion of an area in which the contact moves between the first contactor and the second contactor.

2. The power relay method is a three-phase integrated type in which one phase flows through each of three paths that relay the power, The opening / closing unit is provided for each of the phases, 2. The gas-insulated switchgear according to claim 1, wherein the insulating spacer is configured as one component that insulates the plurality of opening / closing sections from the partition section.

3. 2. The gas-insulated switchgear according to claim 1, wherein the housing has a multi-stage structure in which the second container is placed on the first container in which a circuit breaker is housed, and a third container in which another circuit breaker is housed is placed on the second container.

4. the opening / closing unit includes a first opening / closing unit that opens and closes an input side of a bus bar housed in the second container, and a second opening / closing unit that opens and closes an output side of the bus bar, The gas-insulated switchgear according to claim 1 , wherein the foreign object storage section stores the foreign object below the first opening / closing section and the second opening / closing section.

5. the opening / closing portion is arranged such that the contact follows a path that crosses a central axis of the partition portion when the opening / closing portion is viewed from a side, 2. The gas-insulated switchgear according to claim 1, wherein the insulating spacer is disposed at a position offset from the central axis in a moving direction of the contact.

6. the partition has an opening for exposing the insulating spacer attached to the partition to an inside of the second container, 2. The gas insulated switchgear according to claim 1, wherein the foreign object storage portion is formed in a shape surrounding at least a part of a periphery of the insulating spacer along the opening.

7. 2. The gas-insulated switchgear according to claim 1, wherein the foreign object storage portion is a groove formed in an upper surface of the partition portion.

8. 8. The gas-insulated switchgear according to claim 7, wherein the foreign object storage portion has a conductive member on at least a part of an inner surface of the groove.

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