JP2021129377A - Grounding device, switchgear, and grounding operation method - Google Patents

Abstract

To provide a technology that can secure a space (i.e., spatial expansion) adjacent to a plurality of electrical devices while reducing cost and size in an arrangement where the electrical devices are adjacent to each other.SOLUTION: Grounding devices 9 and 17 are arranged to be adjacent to a plurality of electrical devices and ground a main circuit structure through which electric current flows during power distribution. The grounding devices include a grounding device body 15, which switches between an on-state in which the main circuit structure is grounded and an off-state in which the main circuit structure is not grounded, a replacement unit that is removably attached to the grounding device body, and a space 24, which is configured to be adjacent to the electrical device, installed at a location where the replacement unit has been present in a state in which the replacement unit is removed from the grounding device body.SELECTED DRAWING: Figure 5

Description

An embodiment of the present invention relates to a grounding device, a switchgear, and a grounding operation method.

A switchgear is known as a switchgear for power distribution. The switchgear is provided in, for example, a building or a large facility, and stably supplies electric power by shutting off the accident current and opening / closing the load current. Therefore, in the switchgear, various electric devices such as a circuit breaker, a disconnector, and a grounding device are stacked and stored in a multi-tiered state inside a grounded metal housing.

Jikkai Sho 58-57211 Japanese Unexamined Patent Publication No. 9-163514 Japanese Unexamined Patent Publication No. 62-7708

By the way, the switchgear is required to reduce the cost and increase the number of devices stored in the housing without increasing the size of the housing. As a method for meeting these demands, for example, an arrangement form in which a grounding device is adjacent to each other between two adjacent electric devices (circuit breaker and disconnector) can be considered. In this case, the grounding device operates only when the main circuit structure through which the current flows during power distribution is grounded (grounded), and is always in a stationary state in the housing even though it does not operate at other times.

However, according to such an arrangement form, although it is possible to meet the demand for increasing the number of storage devices in the housing, a work space for electrical devices (circuit breakers, disconnectors) (for example, a three-dimensional space for inspection). ) Will be difficult to secure. In addition, the housing (switchgear) has to be enlarged by the number of stationary grounding devices, and as a result, not only the cost required for manufacturing the housing (switchgear) but also the cost required for arranging the grounding device. Will rise.

An object of the present invention is to secure a space (that is, a spatial expanse) configured adjacent to the electric device while reducing the cost and size in an arrangement form in which a plurality of electric devices are adjacent to each other. It is to provide the technology that is possible.

According to the embodiment, it is a grounding device that is arranged adjacent to a plurality of electric devices and grounds the main circuit structure through which current flows during distribution, and the main circuit structure is grounded and the main circuit structure is grounded. The grounding device main body that switches to the off state that is not turned off, the replacement unit that can be detachably attached to the grounding device main body, and the replacement unit that was removed from the grounding device main body are provided at the place where the replacement unit was. It has a space configured adjacent to the electrical equipment.

The block diagram which shows the whole structure of the switchgear which concerns on embodiment. The perspective view of the grounding device which concerns on the non-grounding operation state. The perspective view of the grounding device which concerns on the grounding operation state. A perspective view of the on / off operation mechanism. A perspective view of the grounding device body. Top view of the grounding device body. The schematic diagram which shows the structure (the 1st connection part, the 2nd connection part) for attaching an on-off operation mechanism to a grounding apparatus main body. The schematic diagram which shows the state which both connecting parts are guided along the guide part. The schematic diagram which shows the state in which both connecting portions are connected. The perspective view which shows the holding posture of an on-off holding mechanism. The perspective view which shows the intermediate posture of the on-off holding mechanism. The front view which shows the holding posture of an on-off holding mechanism. The front view which shows the intermediate posture of the on / off holding mechanism. A perspective view of the grounding device main body held in the on (grounded) state by the on / off holding mechanism. A side view of the grounding device main body held in the on (grounded) state by the on / off holding mechanism. A perspective view of the grounding device main body held in the off (non-grounded) state by the on / off holding mechanism. A side view of the grounding device main body held in the off (non-grounded) state by the on / off holding mechanism. A flow diagram showing a grounding operation method when constructing a space. The perspective view of the on / off operation mechanism which concerns on a modification. The perspective view of the on / off operation mechanism which concerns on a modification. The perspective view of the on / off operation mechanism which concerns on a modification. FIG. 2 is a partial cross-sectional view showing a attachment / detachment mechanism between the on / off operation mechanism and the grounding device main body in the modified example of FIG. A plan view of the internal configuration of the first circuit breaker of FIG. 1 as viewed from the bottom surface side.

[One Embodiment]
Hereinafter, the switchgear according to the embodiment, the grounding device mounted on the switchgear, and the grounding operation method of the grounding device will be described with reference to the accompanying drawings. The embodiments disclosed in the accompanying drawings are merely examples, and the invention is not limited thereto.

FIG. 1 is an internal configuration diagram of the switch gear 1. As the switchgear 1, a solid insulated switchgear (SIS: Solid Insulated Switchgear) is assumed. The switchgear 1 has a grounded metal housing 2, and inside the housing 2, various electric devices (for example, a circuit breaker, a disconnector, a switchgear such as a grounding device, etc.) described later are used. ) Are stacked and stored in multiple layers.

As shown in FIG. 1, the housing 2 includes a horizontally arranged floor 2a, a ceiling 2b facing the floor 2a, and a side wall 2c interposed so as to surround a space between the floor 2a and the ceiling 2b. have. The inside of the housing 2 is defined as a space area surrounded by the floor 2a, the ceiling 2b, and the side wall 2c. The inside of the housing 2 is partitioned by a partition wall 3. The operation structure 4 is housed on one side of the partition wall 3, and the main circuit structure 5 through which a current flows during power distribution is provided on the other side of the partition wall 3.

The switchgear 1 has support portions 6 and 7 for supporting various electric devices described later inside the housing 2 described above. In the example of FIG. 1, two support portions (first support portion 6 and second support portion 7) are arranged on the other side of the partition wall 3 at intervals as components of the main circuit structure 5. .. The second support portion 7 is arranged vertically above the first support portion 6 when viewed in the vertical direction from the floor 2a to the ceiling 2b.

First, the first support portion 6 supports three electric devices 8, 9, and 10. The three electrical devices 8, 9 and 10 are arranged adjacent to each other. These electrical devices 8, 9 and 10 include a first disconnector 8, a first grounding device 9, and a first circuit breaker 10. The first disconnector 8, the first grounding device 9, and the first circuit breaker 10 are arranged side by side in this order when viewed in the vertical direction from the floor 2a to the ceiling 2b. In other words, the first grounding device 9 is arranged adjacent to the first disconnector 8 and the first circuit breaker 10.

Here, as a mode in which the three electric devices 8, 9 and 10 are adjacent to each other, for example, a mode in which the electric devices 8, 9 and 10 are brought into close contact with each other (close to each other) and the electric devices 8, 9 and 10 are brought into close contact with each other. A mode of overlapping (stacking), a mode of gathering (concentrating or aggregating) electric devices 8, 9 and 10 with each other, a mode of reducing the space volume occupied by the three electric devices 8, 9 and 10, a mode of compacting the space volume occupied by the three electric devices 8, 9 and 10. , 9, 10 are partially wrapped (superposed) in the left-right front-rear direction and arranged.

The first disconnector 8 includes a disconnector main body 8a provided with a vacuum valve (not shown) and a disconnector operation unit 8b for opening and closing the vacuum valve. The disconnector operation unit 8b is provided on one side of the partition wall 3 and is supported by the first support unit 6 as a component of the operation structure 4. The disconnector main body 8a is provided on the other side of the partition wall 3 and is supported by the first support portion 6 as a component of the main circuit structure 5. The disconnector main body 8a and the first support portion 6 are molded into a preset shape by, for example, an insulating material such as an epoxy resin.

The disconnector main body 8a (vacuum valve) has its fixed side conductor electrically connected to the cable head 12 via a connecting conduit 11, and the power cable 13 is connected to the cable head 12. The movable side conductor of the disconnector main body 8a (vacuum valve) is connected to the movable side conductor of the circuit breaker main body 10a (vacuum valve) described later via the conductive part 21 (see FIG. 2) built in the first support part 6. It is electrically connected.

As shown in FIG. 1, the first circuit breaker 10 includes a circuit breaker main body 10a provided with a vacuum valve (not shown) and a circuit breaker operation unit 10b for opening and closing the vacuum valve. The circuit breaker operation unit 10b is provided on one side of the partition wall 3 and is supported by the first support unit 6 as a component of the operation structure 4. The circuit breaker main body 10a is provided on the other side of the partition wall 3 and is supported by the first support portion 6 as a component of the main circuit structure 5. The circuit breaker main body 10a and the first support portion 6 are molded into a preset shape by, for example, an insulating material such as an epoxy resin.

For example, a plurality of operation rods (not shown) are built in the first support portion 6, and the operation rods are used between the disconnector operation unit 8b and the disconnector main body 8a, and between the disconnector operation unit 10b and the circuit breaker. It is configured to be movable between the device body 8a and the device body 8a. According to this configuration, by moving the operation rod by the disconnector operation unit 8b and the circuit breaker operation unit 10b, the movable side conductors of the disconnector main body 8a (vacuum valve) and the circuit breaker main body 10a (vacuum valve) are opened and closed. can do.

The disconnector main body 10a (vacuum valve) has a fixed-side conductor connected to a bypass tube 14, via a conductive portion 21 (see FIG. 2) built into the second support portion 7 described later from the bypass tube 14. Therefore, it is electrically connected to the movable side conductor of the disconnector main body 18a (vacuum valve) described later.

As shown in FIG. 1, the first grounding device 9 includes a grounding device main body 15 and a replacement unit 16. The grounding device main body 15 is provided on one side of the partition wall 3 and is supported by the first support portion 6 as a component of the operation structure 4. The replacement unit 16 is detachably attached to the grounding device main body 15 on one side of the partition wall 3.

The grounding device main body 15 has a configuration for switching between an on state in which the main circuit structure 5 is grounded and an off state in which the main circuit structure 5 is not grounded. The replacement unit 16 is detachably attached to the grounding device main body 15. The specific configuration of the first grounding device 9 (grounding device main body 15, replacement unit 16) will be described later.

According to such a configuration, in a state where the replacement unit 16 is removed from the grounding device main body 15, the first grounding device 9 has a space having a spatial expanse in the place where the replacement unit 16 was present (illustrated). Not) is provided. The space is configured adjacent to the above-mentioned two electric devices (first disconnector 8 and first circuit breaker 10). The mode of the space in the first grounding device 9 will be described later.

Next, the second support portion 7 supports the two electric devices 17, 18. The two electrical devices 17, 18 are arranged so as to be adjacent to each other. These electrical devices 17 and 18 include a second grounding device 17 and a second disconnector 18. The second grounding device 17 and the second disconnector 18 are arranged side by side in this order when viewed in the vertical direction from the floor 2a to the ceiling 2b. In other words, the second grounding device 17 is arranged adjacent to the second disconnector 18 vertically below.

Here, as a mode in which the two electric devices 17 and 18 are adjacent to each other, for example, a mode in which the electric devices 17 and 18 are brought into contact with each other (close to each other) and an electric device 17 and 18 are overlapped (stacked) with each other. A mode, a mode in which the electric devices 17, 18 are gathered (concentrated or aggregated) with each other, a mode in which the space volume occupied by the two electric devices 17, 18 is made compact, and the like are included.

The second disconnector 18 includes a disconnector main body 18a provided with a vacuum valve (not shown) and a disconnector operation unit 18b for opening and closing the vacuum valve. The disconnector operation unit 18b is provided on one side of the partition wall 3 and is supported by the second support unit 7 as a component of the operation structure 4. The disconnector main body 18a is provided on the other side of the partition wall 3 and is supported by the second support portion 7 as a component of the main circuit structure 5. The disconnector main body 18a and the second support portion 7 are molded into a preset shape by, for example, an insulating material such as epoxy resin.

For example, one operation rod (not shown) is built in the second support portion 7, and the operation rod is configured to be movable between the disconnector operation unit 18b and the disconnector main body 18a. According to this configuration, the movable side conductor of the disconnector main body 18a (vacuum valve) can be opened and closed by moving the operation rod by the disconnector operating unit 18b.

The disconnector main body 18a (vacuum valve) has its fixed side conductor electrically connected to a bus 20 (an electric wire for interconnection with an adjacent board) via a connecting conduit 19. Here, it is assumed that the main circuit structure 5 is not grounded by the first grounding device 9 (or the second grounding device 17 described later) described above. In this state, the high-voltage power supplied from the external power source via the power cable 13 is received by the main circuit structure 5 and then converted into a voltage suitable for the application through the main circuit structure 5. , Power is distributed to various places through the bus 20.

The second grounding device 17 includes a grounding device main body 15 and a replacement unit 16. The grounding device main body 15 is provided on one side of the partition wall 3 and is supported by the second support portion 7 as a component of the operation structure 4. The replacement unit 16 is detachably attached to the grounding device main body 15 on one side of the partition wall 3.

The grounding device main body 15 has a configuration for switching between an on state in which the main circuit structure 5 is grounded and an off state in which the main circuit structure 5 is not grounded. The replacement unit 16 is detachably attached to the grounding device main body 15. The specific configuration of the second grounding device 17 (grounding device main body 15, replacement unit 16) will be described later.

According to such a configuration, in a state where the replacement unit 16 is removed from the grounding device main body 15, the second grounding device 17 has a space having a spatial expanse in the place where the replacement unit 16 was present (illustrated). Not) is provided. The space is configured adjacent to the above-mentioned one electric device (second disconnector 18). The mode of the space in the second grounding device 17 will be described later.

Here, in the first grounding device 9 and the second grounding device 17 described above, the spatial expansion mode of the space is, for example, the space corresponds to the occupied area of the exchange unit 16 and is a three-dimensional space in which a tangible object does not intervene. Can be specified as. The three-dimensional space is, for example, a grounding device described later in a space area widened in a direction away from the facing surfaces (horizontal horizontal planes) of the electric devices 8, 10 and 18 facing the grounding devices 9, 17. It can be defined as a space area excluding the main body 15.

The space region is formed, for example, when the replacement unit 16 is removed from the grounding device main body 15 in the on state where the main circuit structure 5 is grounded by the grounding device main body 15. Specifically, the above-mentioned space region (space, three-dimensional space) is a state in which the replacement unit 16 is removed from the grounding device main body 15 after the movable contact 23 described later is electrically brought into contact with the main circuit structure 5. In the above, it refers to a spatial expanse avoiding the grounding device main body 15.

Further, in the first grounding device 9 and the second grounding device 17 described above, as the usage mode or application of the space (three-dimensional space, space area), for example, various operations are performed on the adjacent electric devices 8, 10 and 18. A work space for performing (inspection, maintenance, etc.), or an air conditioning space for increasing the spatial contact area of adjacent electric devices 8, 10 and 18 to improve air cooling efficiency can be assumed. It is preferable that the main circuit structure 5 is used as a work space in a grounded state.

2 and 3 are layout configuration diagrams of the first grounding device 9 and the second grounding device 17. Both the first grounding device 9 and the second grounding device 17 have a grounding device main body 15 and a replacement unit 16, and both the grounding device main body 15 and the replacement unit 16 have the same configuration as each other. .. Further, the conductive portion 21 built in the first support portion 6 that supports the first grounding device 9 and the conductive portion 21 built in the second support portion 7 that supports the second grounding device 17 are also the same. It has a configuration.

Therefore, in the following, only one of the grounding device main body 15, the replacement unit 16, and the conductive portion 21 will be described (see FIGS. 2 and 3). In the examples of FIGS. 2 and 3, three conductive portions 21 arranged in non-contact with each other are provided, and each conductive portion 21 forms a plate shape electrically connected to the main circuit structure 5 described above. However, each of the three contacts 22 (hereinafter referred to as conductive contacts) to which the three movable contacts 23 described later can be contacted is provided.

FIG. 2 shows a state in which the movable contact 23 is separated from the conductive contact 22 of the conductive portion 21 by the grounding device main body 15. At this time, the main circuit structure 5 (that is, the grounding devices 9, 17) is in a non-grounded (non-grounded, non-grounded) state. In this state, a current flows through the main circuit structure 5 via the conductive portion during power distribution.

FIG. 3 shows a state in which the movable contact 23 is brought into contact with the conductive contact 22 of the conductive portion 21 by the grounding device main body 15. At this time, the main circuit structure 5 (that is, the grounding devices 9, 17) is in a grounded on (grounded, grounded) state. In this state, by removing the replacement unit 16 (that is, the on / off operation mechanism 34) described later from the grounding device main body 15, a space 24 (see FIGS. 5 and 23) is used in the place where the replacement unit 16 was present. Is configured, and various operations can be performed through the space.

As shown in FIGS. 2 and 3, the switching between the off state and the on state is performed by rotating the operation handles 25 provided on the grounding devices 9 and 17. For example, by rotating the operation handle 25 clockwise (forward rotation), the grounding devices 9, 17 (main circuit structure 5) are switched to the on state (see FIG. 3). On the other hand, by rotating (reversing) the operation handle 25 counterclockwise, the grounding devices 9, 17 (main circuit structure 5) are switched to the off state (see FIG. 2).

In order to realize such a switching operation, the grounding devices 9 and 17 are provided with a detachable mechanism 26, a grounding device main body 15, and a replacement unit 16. In this case, in a state where the replacement unit 16 is attached to the grounding device main body 15 by the attachment / detachment mechanism 26, the above-mentioned switching operation between the off state and the on state is performed by operating the grounding device main body 16 by the replacement unit 16.

The attachment / detachment mechanism 26 has a pair of side frames 27, a mounting frame 28, and an engaging convex portion 29. The side frames 27 are arranged in parallel with each other so as to surround the grounding device main body 15 from both sides, and one end thereof is attached to the partition wall 3. The mounting frame 28 is interposed between the other ends of the side frame 27 and connects the side frames 27 to each other.

The engaging convex portion 29 is arranged so as to support the main body portion 37 of the on / off operation mechanism 34, which will be described later, from both sides. In the examples of FIGS. 2 and 3, two engaging protrusions 29 are provided on the mounting frame 28. The engaging convex portion 29 includes a convex portion main body 29a and a plunger 29b that is urged to project and retract with respect to the convex portion main body 29a. The convex portion main body 29a is raised from the mounting frame 28 while facing each other in parallel. The plunger 29b is always maintained in a state of being urged toward the spatial region between the convex portion main bodies 29a. In this state, the pin 29p of the plunger 29b (see FIGS. 5 and 6) protrudes from the convex body 29a toward the spatial region.

As shown in FIGS. 2 and 3, the grounding device main body 15 includes the above-mentioned conductive contact 22, a contact 30 provided on the partition wall 3 (hereinafter referred to as a support contact), a magnetic coupling 31, and a support guide. It has 32, a first connecting portion 33, and a movable contact 23.

The support contact 30 is provided so as to penetrate the partition wall 3 so that the movable contact 23 can be inserted while being supported. The magnetic coupling 31 and the support guide 32 are attached to one side of the partition wall 3 and are configured to be able to support the shafts 38 and 39 of the replacement unit 16 (that is, the on / off operation mechanism 34) described later. .. The magnetic coupling 31 uses, for example, the magnetic force action (attractive force, repulsive force) of a permanent magnet to rotatably support the shaft 38 of the other party in a non-contact manner. The support guide 32 has, for example, a hollow cylindrical shape, and supports the other shaft 39 while partially inserting the end portion thereof.

The first connecting portion 33 is provided on the movable contact 23, and the on / off operation mechanism 34 described later is detachably connected. Here, as an example, the shape and size of the first connecting portion 33 have a rectangular three-dimensional shape, and are set to a size that can collectively support a plurality of movable contacts 23. The first connecting portion 33 is provided with a plurality of connecting holes 33h for connecting the on / off operation mechanism 34, which will be described later.

The movable contact 23 has a cylindrical shape that extends straight and has the same diameter over the entire length. The movable contacts 23 are arranged parallel to each other at equal intervals, and one end thereof is supported by the first connecting portion 33. The other end of the movable contact 23 is a free end, and is configured so that it can be inserted into the support contact 30 from the other end (free end) side.

According to such a configuration, by operating the grounding device main body 15 by the replacement unit 16, the movable contact 23 is supported by the support contact 30, and the movable contact 23 is passed through the support contact 30 in a preset direction (that is, that is). , One direction). As a result, the other end (free end) of the movable contact 23 can be brought into contact with the conductive contact 22 of the conductive portion 21 described above (see FIG. 3). At this time, the movable contact 23 comes into electrical contact with the main circuit structure 5. As a result, the main circuit structure 5 is in a grounded state.

On the other hand, by operating the grounding device main body 15 by the replacement unit 16, the movable contact 23 is supported by the support contact 30, and the movable contact 23 is passed through the support contact 30 in a preset direction (that is, another direction). ) Can be moved. As a result, the other end (free end) of the movable contact 23 can be separated from the conductive contact 22 of the conductive portion 21 (see FIG. 2). At this time, the movable contact 23 is electrically non-contact with the main circuit structure 5. As a result, the main circuit structure 5 is in a non-grounded (non-grounded) state.

In the examples of FIGS. 2 and 3, the on / off operation mechanism 34 is applied as the exchange unit 16. The on / off operation mechanism 34 is detachably attached to the grounding device main body 15 via the above-mentioned attachment / detachment mechanism 26. In this state, by operating the grounding device main body 15 by the on / off operation mechanism 34, the above-mentioned switching operation between the off state and the on state is performed.

The on / off operation mechanism 34 includes a moving means 35, a second connecting portion 36, and a main body portion 37.
The moving means 35 has a screw shaft 38, a guide shaft 39, and an operation handle 25. The screw shaft 38 extends straight, and a screw (not shown) is spirally cut over the entire length of the surface thereof. The guide shaft 39 extends straight and is formed in a smooth cylindrical surface shape having no unevenness over the entire length of the surface thereof. Both of these shafts 38 and 39 are arranged parallel to each other.

One end of the screw shaft 38 is rotatably supported by the main body 37. One end of the guide shaft 39 is supported by the main body 37. The operation handle 25 is connected to one end of the screw shaft 38 through the main body 37. By rotating the operation handle 25, the screw shaft 38 can be rotated following this.

A magnetic coupling 40 is provided at the other end of the screw shaft 38. The other end of the guide shaft 39 is a free end. According to such a configuration, the other end of the screw shaft 38 (that is, the magnetic coupling 40) is partitioned when the on / off operation mechanism 34 is attached to the grounding device main body 15 via the above-mentioned attachment / detachment mechanism 26. It faces the magnetic coupling 31 provided on the wall 3 in a non-contact manner, and is rotatably supported by the above-mentioned magnetic force action. At the same time, the other end of the guide shaft 39 is inserted into and supported by the support guide 32 provided on the partition wall 3.

The second connecting portion 36 is detachably connected to the first connecting portion 33 described above. The second connecting portion 36 has a connecting member 41, a nut block 42, and a slide block 43.
The connecting member 41 has two connecting plates 41p arranged parallel to each other. These two connecting plates 41p are fixed to the nut block 42 and the slide block 43 so as to sandwich the nut block 42 and the slide block 43 from both sides. Thus, the nut block 42 and the slide block 43 are connected to each other via a connecting member 41 (connecting plate 41p).

The nut block 42 has a nut portion 42p, and the nut portion 42p is configured to penetrate the nut block 42. The screw shaft 38 described above is screwed into the nut portion 42p. By rotating the screw shaft 38, the nut block 42 can be moved along the screw shaft 38.

The slide block 43 has a slider portion 43p, and the slider portion 43p is configured to penetrate the slide block 43. The guide shaft 39 described above is inserted through the slider portion 43p. By sliding the slider portion 43p along the guide shaft 39, the slide block 43 can be moved along the guide shaft 39.

The main body 37 has a rectangular rectangular parallelepiped shape and is configured to be able to support the above-mentioned moving means 35. The main body is provided with one engaging recess 37p (see FIG. 4) on each side in the longitudinal direction. The engaging recess 37p is configured as a detachable hole in which the main body 37 is partially recessed. A part of the above-mentioned attachment / detachment mechanism 26 (that is, the pin 29p of the plunger 29b (see FIGS. 5 and 6)) is removably engaged with these engagement recesses 37p (detachment holes). At this time, as shown in FIGS. 2 and 3, the main body 37 is supported by the grounding device main body 15 via the attachment / detachment mechanism 26 together with the moving means 35 and the second connecting portion 36. Thus, the on / off operation mechanism 34 is attached to the grounding device main body 15.

When the operation handle 25 is turned while the on / off operation mechanism 34 is attached to the grounding device main body 15, the screw shaft 38 rotates accordingly. As the screw shaft 38 rotates, the nut block 42 moves along the screw shaft 38. The moving force at this time is transmitted from the nut block 42 to the slide block 43 via the connecting member 41 (connecting plate 41p). As a result, the slide block 43 moves along the guide shaft 39. Thus, both blocks 42, 43 (second connecting portion 36) can be moved along the same direction (that is, the moving direction of the movable contact 23 described above) at the same timing (velocity).

Here, an example of a process of attaching the on / off operation mechanism 34 (replacement unit 16) to the grounding device main body 15 by the attachment / detachment mechanism 26 will be described with reference to FIGS. 4 to 6. FIG. 4 is an overall view of the on / off operation mechanism 34 removed from the grounding device main body 15. 5 and 6 are an on-state diagram of the grounding device main body 15 from which the on / off operation mechanism 34 has been removed.

As shown in FIGS. 4 to 6, first, the other end of the screw shaft 38 (magnetic coupling 40) and the other end of the guide shaft 39 (free end) are connected to the two connecting holes 33h of the first connecting portion 33. Insert one by one.
Next, the other end (magnetic coupling 40) of the screw shaft 38 is made to face the magnetic coupling 31 provided on the partition wall 3 in a non-contact manner. The other end (free end) of the guide shaft 39 is inserted into the support guide 32 provided on the partition wall 3.

At this time, the magnetic force action (attractive force, repulsive force) of the permanent magnet acts between the magnetic coupling 40 of the screw shaft 38 and the magnetic coupling 31 of the partition wall 3. As a result, the screw shaft 38 is rotatably supported. On the other hand, the free end of the guide shaft 39 is supported by the support guide 32 of the partition wall 3.

Subsequently, in a state where the pin 29p of the plunger 29b is retracted, the main body portion 37 is arranged between the engaging convex portions 29. Then, the withdrawal force of the pin 29p is released. At this time, an urging force acts, and the pin 29p protrudes from the convex portion main body 29a. The protruding pin 29p engages with the engaging recess 37p (attachment / detachment hole) of the main body 37.

As a result, both sides of the main body 37 are supported by the engaging protrusions 29. As a result, the main body 37 is supported by the grounding device main body 15 via the attachment / detachment mechanism 26 together with the moving means 35 and the second connecting portion 36 described above. Thus, the on / off operation mechanism 34 is attached to the grounding device main body 15.

After that, in a state where the on / off operation mechanism 34 is attached to the grounding device main body 15, the first connecting portion 33 and the second connecting portion 36 are relatively close to each other so that the first connecting portion 33 and the second connecting portion 33 are relatively close to each other. 36 is connected. As a method of connecting the first connecting portion 33 and the second connecting portion 36, for example, the operation handle 25 described above may be turned to bring the second connecting portion 36 closer to the first connecting portion 33.

The grounding devices 9 and 17 are provided with a coupling mechanism to carry out such a coupling process. The connecting mechanism includes a connecting convex portion 44, a connecting concave portion 45, and a guide portion 46.
The connecting convex portion 44 can be provided on either the first connecting portion 33 or the second connecting portion 36. The connecting convex portion 44 includes a plunger 44a that is urged to project in a preset direction (for example, toward the connecting hole 33h described later).

In the examples of FIGS. 5 and 6, the connecting convex portion 44 is provided in the first connecting portion 33, and two plungers 44a are arranged with respect to one connecting hole 33h. At this time, the pin 44p of the plunger 44a (see FIGS. 7 to 9) is always maintained in a state of being urged toward the space region of the connecting hole 33h. In this state, the pin 44p of the plunger 44a protrudes from the connecting hole 33h toward the space region.

Further, as shown in FIGS. 4 to 6, the connecting recess 45 can be provided in either the first connecting portion 33 or the second connecting portion 36. In the examples of FIGS. 5 and 6, the connecting recess 45 is provided in the second connecting portion 36, and is configured so that the connecting convex portion 44 (that is, the pin 44p of the plunger 44a) can be fitted. As the connecting recess 45, an insertion hole into which the pin 44p of the plunger 44a can be inserted can be applied.

The guide portion 46 is continuously formed toward the connecting recess 45. The guide portion 46 has an inclined surface having a gradient toward the connecting recess 45. The guide portion 46 (inclined surface) is formed on a smooth surface without unevenness. The direction (inclination) of the gradient can be set to, for example, an upslope (inclination) and a downslope (inclination). In the examples of FIGS. 5 and 6, the guide portion 46 (inclined surface) is set to an uphill slope (inclined). The connection recess 45 (insertion hole) described above is arranged on the top of the guide portion 46 (inclined surface) having an upslope (inclination).

7 to 9 are process diagrams in which the connecting convex portion 44 is fitted into the connecting concave portion 45 when the first connecting portion 33 and the second connecting portion 36 are connected. That is, the operation handle 25 described above is turned to bring the second connecting portion 36 closer to the first connecting portion 33. At this time, the connecting convex portion 44 of the first connecting portion 33 approaches the guide portion 46 and the connecting concave portion 45 of the second connecting portion 36 (see FIG. 7).

Subsequently, when the operation handle 25 is turned, the connecting convex portion 44 (plunger 44a) approaches the guide portion 46 (inclined surface). At this time, the pin 44p of the plunger 44a receives a reaction force from the guide portion 46 (inclined surface) while being guided along the guide portion 46 (inclined surface). As a result, the pin 44p of the plunger 44a retracts against the urging force (see FIG. 8).

Further, when the operation handle 25 is turned, the pin 44p of the plunger 44a passes through the guide portion 46 (inclined surface) and is positioned in the connecting recess 45 (insertion hole). At this time, the pin 44p of the plunger 44a is pressed in the direction of the connecting recess 45 (insertion hole) by the urging force and fits into the connecting recess 45 (insertion hole) (see FIG. 9).

As a result, the first connecting portion 33 and the second connecting portion 36 are connected to each other. In this state, by operating the grounding device main body 15 by the on / off operation mechanism 34, the above-mentioned switching operation between the off (non-grounded, non-grounded) state and the on (grounded, grounded) state is performed. That is, by rotating the operation handle 25 clockwise (forward rotation), the grounding devices 9, 17 (main circuit structure 5) are switched to the on state (see FIG. 3). On the other hand, by rotating (reversing) the operation handle 25 counterclockwise, the grounding devices 9, 17 (main circuit structure 5) are switched to the off state (see FIG. 2).

Further, the grounding devices 9 and 17 are provided with a detachable on / off holding mechanism 47 as a replacement unit 16 for holding the on / off state switched by the on / off operation mechanism 34 described above. The on / off holding mechanism 47 is detachably attached to the grounding device main body 15 after the on / off operation mechanism 34 is removed from the grounding device main body 15.

As a method of removing the on / off operation mechanism 34 from the grounding device main body 15, for example, the plunger 44a is pulled up in a state where the pin 44p of the plunger 44a is fitted into the connecting recess 45 (insertion hole) (see FIG. 9). .. At this time, the pin 44p is pulled out from the connecting recess 45 (insertion hole). While maintaining this state, the operation handle 25 is rotated counterclockwise (reverse). As a result, the connected state between the first connecting portion 33 and the second connecting portion 36 is released. As a result, the on / off operation mechanism 34 can be removed from the grounding device main body 15.

10 to 17 show an arrangement configuration of the on / off holding mechanism 47 as the exchange unit 16. 10 and 12 are posture diagrams for holding on / off, and FIGS. 11 and 13 are posture diagrams for on / off exchange. 14 and 15 are layout configuration diagrams of the on / off holding mechanism 47 related to holding the on / off state, and FIGS. 16 and 17 are layout configuration diagrams of the on / off holding mechanism 47 related to holding the on / off state.

As shown in FIGS. 10 to 13, the on / off holding mechanism 47 includes an on / off state holding portion 48, an on / off state holding portion 49, an on / off operation unit 50, and an on / off support portion 51. ..
The ON state holding unit 48 is configured to be in contact with one end surface of the first connecting unit 33 in the ON (grounded, grounded) state and to be able to hold the state. The on-state holding portion 48 is set to have a surface contour that allows uniform contact with one end surface of the first connecting portion 33. In the example of FIGS. 10 to 13, the on-state holding portion 48 has a rectangular plate-like contour.

One end of the on-state holding portion 48 is folded back toward the first connecting portion 33. The other end of the on-state holding portion 48 is connected to the off-state holding portion 49 via a connecting member 52. The on-state holding portion 48 is supported by a rotating shaft 53 between one end and the other end, and can be rotated around the rotating shaft 53.

The off state holding portion 49 is configured to be in contact with the other end surface (opposite side of one end surface) of the first connecting portion 33 in the off (non-grounded, non-earthed) state and to be able to hold that state. The cut state holding portion 49 is set to have a surface contour that allows uniform contact with the other end surface of the first connecting portion 33. In the example of FIGS. 10 to 13, the cut state holding portion 49 has a rectangular plate-like contour.

The off state holding portion 49 is supported by the rotating shaft 53 on one end side thereof, and can be rotated around the rotating shaft 53. The other end of the off state holding portion 49 is connected to the other end of the on state holding portion 48 described above via the connecting member 52. As a result, as the rotating shaft 53 rotates, the on-state holding portion 48 and the off-state holding portion 49 rotate in the same direction at the same timing (speed).

The on / off operation unit 50 includes two rotating shafts 53, each of which has the same configuration as described above. The on / off operation unit 50 has a rotating structure 54 that rotates both rotating shafts 53 at the same time. The rotating structure 54 is supported by the on / off support portion 51. The on / off support portion 51 has a rectangular plate-like contour, and both sides thereof are detachably attached to the other ends of the pair of side frames 27 of the attachment / detachment mechanism 26 described above.

The two rotating shafts 53 are rotatably supported by the on / off support portion 51 via the guide bush 55. The rotary structure 54 is supported by the on / off support portion 51 between the guide bushes 55 (rotary shaft 53). The rotating structure 54 has one main link 56, two slave links 57, an operation pin 58, and a guide pin 59.

The on / off support portion 51 is provided with three guide grooves 60 between the guide bushes 55 (rotary shaft 53). The three guide grooves 60 are formed so as to penetrate the on / off support portion 51, and are arranged parallel to each other and at equal intervals. An operation pin 58 is inserted through the central guide groove 60, and the operation pin 58 is configured to be movable along the guide groove 60. Guide pins 59 are inserted into the guide grooves 60 on both sides one by one, and the guide pins 59 are configured to be movable along the guide grooves 60.

The main link 56 extends between the guide bushes 55, and the operation pin 58 described above and the guide pins 59 on both sides thereof are connected to each other. According to this configuration, when the operation pin 58 is moved up and down along the guide groove 60, the main link 56 moves up and down while maintaining a constant posture while being supported by the guide pin 59 moving along the guide groove 60. do.

A long hole 56h is formed through both sides of the main link 56, and a pin 61 is inserted through the long hole 56h. A pin 61 is connected to one end of the slave link 57, and a rotating shaft 53 is connected to the other end. According to this configuration, the vertical movement of the operation pin 58 is transmitted from the main link 56 to the rotating shaft 53 via the secondary link 57 to rotate the rotating shaft 53. As a result, the postures of the on / off state holding unit 48 and the off state holding unit 49 can be switched between the on / off holding posture (see FIGS. 10 and 12) and the on / off exchange posture (see FIGS. 11 and 13). can.

Here, in a state (see FIG. 3) in which the above-mentioned operation handle 25 is rotated clockwise (forward rotation) and the grounding devices 9, 17 (main circuit structure 5) are switched to the ON state (see FIG. 3), FIGS. 14 and 15 Then, the on / off holding mechanism 47 is attached to the grounding device main body 15 from which the on / off operation mechanism 34 has been removed.

That is, in a state where the above-mentioned operation pin 58 is lowered and the postures of the on / off state holding portion 48 and the off state holding portion 49 are set to the on / off holding posture (see FIGS. 10 and 12), both sides of the on / off support portion 51 are held. It is attached to the other end of the side frame 27. At this time, the on-state holding portion 48 in the on-off holding posture makes uniform contact with one end surface of the first connecting portion 33. As a result, the grounding devices 9, 17 (main circuit structure 5) are held in the on state.

On the other hand, in the state where the operation handle 25 is rotated counterclockwise (reverse) and the grounding devices 9, 17 (main circuit structure 5) are switched to the off state (see FIG. 2), FIGS. 16 and 17 show. The on / off holding mechanism 47 is attached to the grounding device main body 15 from which the on / off operation mechanism 34 has been removed.

That is, in a state where the operation pin 58 is raised and the postures of the on-state holding portion 48 and the off-state holding portion 49 are set to the on / off exchange postures (see FIGS. 11 and 13), the on-state holding portion 48 and the off-state holding portion 48 and the off-state are in the state of being changed. The holding portion 49 is inserted into the two connecting holes 33h of the first connecting portion 33 together with the rotating shaft 53. After that, in a state where the operation pin 58 is lowered and the postures of the on / off state holding portion 48 and the off state holding portion 49 are set to the on / off holding posture (see FIGS. 10 and 12), both sides of the on / off support portion 51 are sided. It is attached to the other end of the frame 27. At this time, the cut state holding portion 49 in the on / off holding posture uniformly contacts the other end surface (opposite side of one end surface) of the first connecting portion 33. As a result, the grounding devices 9, 17 (main circuit structure 5) are held in the off state.

FIG. 18 is a process diagram constituting the above-mentioned space 24 (see FIG. 6). Here, as an example, a work space for performing various operations (inspection, maintenance, etc.) on adjacent electric devices is assumed.
First, the necessity of the space is confirmed (S1).

At this time, if space is required (S2), is the on / off operation mechanism 34 currently attached to the grounding device main body 15 (S3), or the on / off holding mechanism 47 is attached to the grounding device main body 15. Whether or not (S4) is determined.

Then, in a state where any of these replacement units 16 (on / off operation mechanism 34, on / off holding mechanism 47) is attached to the grounding device main body 15, the grounding devices 9, 17 (main circuit structure 5) are turned off (main circuit structure 5). It is determined whether it is in the non-grounded state (S5) or whether the grounding devices 9, 17 (main circuit structure 5) is in the on (grounded) state (S6).

Here, when the grounding devices 9 and 17 (main circuit structure 5) are in the off (non-grounded) state (in other words, when they are not in the on (grounded) state), the switchgear 1 is in an operable state. (S7).
On the other hand, when the grounding device 9,17 (main circuit structure 5) is not in the off (non-grounded) state (in other words, when it is in the on (grounding) state), the grounding device 9,17 (main circuit structure 5) is , It is in a grounded state (S8).

At this time, the replacement unit 16 (on / off operation mechanism 34, on / off holding mechanism 47) is removed from the grounding device main body 15 (S9). In this state, a space 24 (see FIG. 6) having a spatial expanse is configured at the place where the exchange unit 16 was present (S10). At this time, the space 24 is configured adjacent to the above-mentioned electric device.

After that, various operations (inspection, maintenance, etc.) can be performed on the adjacent electrical equipment through the space 24 (S11).

As described above, according to the present embodiment, by removing the replacement unit 16 (on / off operation mechanism 34, on / off holding mechanism 47) from the grounding device main body 15, a space can be configured adjacent to the electric device. .. As a result, the grounding devices 9 and 17 can be adjacent to each other between two adjacent electric devices (circuit breaker and disconnector). In this case, an empty space can be secured in the housing 2 without increasing the size of the switch gear 1 (housing 2). As a result, the number of storage devices in the housing 2 can be increased.

According to the present embodiment, even when a plurality of grounding devices 9 and 17 are arranged adjacent to the electric equipment (circuit breaker, disconnector), only the grounding device main body 15 needs to be arranged in each place. In this case, one replacement unit 16 (on / off operation mechanism 34, on / off holding mechanism 47) can be diverted to each grounding device main body 15. As a result, not only the cost required for manufacturing the housing 2 (switchgear 1) but also the cost required for arranging the grounding devices 9 and 17 can be significantly reduced.

According to the present embodiment, by removing the replacement unit 16 (on / off operation mechanism 34, on / off holding mechanism 47) in the on (ground, ground) state, a space is configured as a three-dimensional space without tangible objects. be able to. As a result, various operations (inspection, maintenance, etc.) can be performed safely and reliably through the space.

According to the present embodiment, particularly when the on / off operation mechanism 34 (replacement unit 16) is attached to the grounding device main body 15, the above-mentioned first connecting portion 33 and the second connecting portion 36 are only relatively close to each other. The on / off operation mechanism 34 (replacement unit 16) can be attached to the grounding device main body 15 with one touch. As a result, the grounding devices 9 and 17 having excellent mountability can be realized.

[Modification example]
19 and 20 relate to the improvement of the rotating structure 54 of the on / off operation mechanism 34, and in this modified example, the main body 37 has a screw shaft 38 and a nut block 42 instead of the guide shaft 39 and the slide block 43. Two combinations (not shown) are provided. In this case, a configuration is applied in which the rotational movement of the operating handle 25 is transmitted to both screw shafts 38.

In the configuration of FIG. 19, one main gear 62 is attached to one end of both screw shafts 38. A relay gear 63 is interposed between the two main gears 62. The relay gear 63 is rotatably supported with respect to the main body 37. The relay gear 63 meshes with both main gears 62.

According to the configuration of FIG. 19, the rotational movement of the operating handle 25 is transmitted from one main gear 62 to the other main gear 62 via the relay gear 63. As a result, both main gears 62 can be rotated in the same direction at the same timing (speed). Thus, by rotating the operation handle 25, it is possible to switch between the off state and the on state as described above.

In the configuration of FIG. 20, pulleys 64 are attached to one end of both screw shafts 38. An endless belt 65 is hung between both pulleys 64.
According to the configuration of FIG. 20, the rotational movement of the operating handle 25 is transmitted from one pulley 64 to the other pulley 64 via the endless belt 65. As a result, both pulleys 64 can be rotated in the same direction at the same timing (speed). Thus, by rotating the operation handle 25, it is possible to switch between the off state and the on state as described above.

21 and 22 relate to the improvement of the on / off operation mechanism 34, and in this modified example, a part of the above-mentioned attachment / detachment mechanism 26 (for example, a pair of side frames 27) is previously provided with the on / off operation mechanism 34. It is attached to both sides of the main body 37 of the above. As the mounting method, for example, existing methods such as screwing, bonding, and welding can be applied.

In this modification, one end of the side frame 27 to which the on / off operation mechanism 34 is attached in advance is detachably attached to the partition wall 3. As a result, the on / off operation mechanism 34 is detachably attached to the grounding device main body 15. In the examples of FIGS. 21 and 22, a mounting structure is provided to one end of the side frame 27 and the partition wall 3.

In such a mounting structure, two mounting openings 66 and a lock pin 67 interposed between the two mounting openings 66 are provided at one end of the side frame 27. On the other hand, the partition wall 3 is provided with two mounting pins 68 and a bush 69 interposed between the mounting pins 68.

Here, when one end of the side frame 27 is attached to the partition wall 3, two attachment pins 68 face each other with respect to the two attachment openings 66, and the bush 69 faces the lock pin 67. In this case, for example, the lock pin 67 is pushed into the bush 69 while pressing the button 67p while inserting the mounting pin 68 into the mounting opening 66. Then, the pressing of the button 67p is released.

At this time, the ball 67s of the lock pin 67 is fitted into the stepped portion 69p of the bush 69 and fixed. As a result, one end of the side frame 27 is attached to the partition wall 3. Thus, the on / off operation mechanism 34 is attached to the grounding device main body 15.

On the other hand, in such a state, the button 67p of the lock pin 67 is pressed. Then, the fitting between the bush 69 (step portion 69p) and the ball 67s is released. As a result, the on / off operation mechanism 34 can be removed from the grounding device main body 15.

Although not particularly shown, a combination of a clamper and a clamper pin may be used instead of the combination of the lock pin 67 and the bush 69.

FIG. 23 relates to an example of the internal configuration of the first circuit breaker 10 (see FIG. 1) described above, and in this modified example, the first circuit breaker 10 is provided with an electrode urging mechanism 70. The electrode urging mechanism 70 is configured so that two electrodes (counter electrode 71, movable electrode 72) arranged in the region of the main circuit structure 5 can be brought into contact with each other with an optimum pressing force.

The first circuit breaker 10 is provided with a bottom cover (not shown) on the bottom surface (the surface facing the floor 2a) when viewed in the vertical direction from the floor 2a to the ceiling 2b. The bottom cover is detachably attached to the first circuit breaker 10 with, for example, two screws 73. The two screws 73 are arranged at the bottom corner of the first circuit breaker 10. In the example of FIG. 23, a part of the electrode urging mechanism 70 seen from the bottom surface side of the first circuit breaker 10 is shown in a state where the bottom surface lid is removed.

In the electrode urging mechanism 70 shown in FIG. 23, the counter electrode 71 is fixed at a predetermined position of the main circuit structure 5 via the fixing member 74. The movable electrode 72 is arranged so as to face the counter electrode 71 in parallel, and is provided at the tip of the operation rod 75. The operating rod 75 has a straight extending rod shape, and the base end (opposite side of the tip) of the operating rod 75 reaches the inside of the first circuit breaker 10 through the partition wall 3 described above.

A spring contact portion 76 is provided at the base end of the operation rod 75, and the spring contact portion 76 is configured to be able to receive a pressing force (elastic force, urging force) from the urging means 77 described later. ing. The operation rod 75 is configured to be movable in a preset direction by receiving a pressing force (elastic force, urging force) from the urging means 77. The urging means 77 is supported at a predetermined position inside the first circuit breaker 10 by a support mechanism (not shown).

In the example of FIG. 23, the urging means 77 has a spring guide 78, a spring locking portion 79, a fastening mechanism 80, and a coil spring 81. The spring guide 78 has a rod shape having both ends (one end, the other end), and is arranged parallel to the moving direction of the operating rod 75. One end of the spring guide 78 is arranged so as to face the spring contact portion 76 described above. A spring locking portion 79 is movably exteriorized at the other end of the spring guide 78, and a fastening mechanism 80 (for example, a nut) is provided on the outside of the spring locking portion 79.

The coil spring 81 is interposed between the spring contact portion 76 and the spring locking portion 79, and is spirally arranged along the outer circumference of the spring guide 78. One end of the coil spring 81 is in contact with the spring locking portion 79, and the other end is in contact with the spring contact portion 76.

In such a configuration, when the nut (fastening mechanism) 80 is screwed in, the compressed state of the coil spring 81 is adjusted according to the screwing amount. As a result, the pressing force (elastic force, urging force) applied from the urging means 77 to the spring contact portion 76 is set. At this time, the operating rod 75 moves together with the spring contact portion 76. Thus, the movable electrode 72 at the tip of the operating rod 75 comes into contact with the counter electrode 71 with an optimum pressing force.

Here, the three-dimensional spatial extent (range) of the space 24 (see FIGS. 5 and 6) described above is divided into a vertical direction from the floor 2a to the ceiling 2b and a horizontal direction orthogonal to the vertical direction. Consider. In this case, as shown in FIG. 23, the horizontal expansion of the space 24 includes the above-mentioned urging means 77 (spring guide 78, spring locking portion 79, fastening mechanism 80, coil spring 81) and two screws 73. And are set in the range to be included collectively. On the other hand, although not particularly shown, the vertical expansion of the space 24 is set in the range of about 1/4 to 1/2 (for example, about 150 mm) of the height of the first circuit breaker 10. As a result, the space 24 is configured to have a size that allows a person's palm to enter, for example. Thus, for example, a work space 24 for performing an inspection can be secured.

Although the embodiments and modifications of the present invention have been described above, these embodiments and modifications are presented as examples and are not intended to limit the scope of the invention. These embodiments and modifications can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and the equivalent scope thereof.

1 ... Switch gear, 2 ... Housing, 3 ... Partition wall, 4 ... Operation structure, 5 ... Main circuit structure, 6 ... 1st support, 7 ... 2nd support, 8 ... 1st disconnector, 9 ... 1 Grounding device, 10 ... 1st circuit breaker, 15 ... Grounding device main body, 16 ... Replacement unit, 17 ... 2nd grounding device, 18 ... 2nd disconnector, 21 ... Conductive part, 24 ... Space, 25 ... Operation handle, 26 ... Detachment mechanism, 33 ... 1st connecting part, 34 ... On / off operation mechanism, 36 ... 2nd connecting part, 37 ... Main body, 38 ... Screw shaft, 39 ... Guide shaft, 42 ... Nut block, 43 ... Slide block , 44 ... Connecting convex portion, 45 ... Connecting concave portion, 46 ... Guide portion, 47 ... On / off holding mechanism.

Claims (9)

A grounding device that is placed adjacent to multiple electrical devices and grounds the main circuit structure through which current flows during power distribution.
A grounding device main body that switches between an on state in which the main circuit structure is grounded and an off state in which the main circuit structure is not grounded.
A replacement unit that can be detachably attached to the grounding device body,
A grounding device having a space provided at a location where the replacement unit was present and configured adjacent to the electric device in a state where the replacement unit is removed from the grounding device main body. The grounding device according to claim 1, wherein the space corresponds to an occupied area of the exchange unit and is a three-dimensional space in which a tangible object does not intervene. The replacement unit
An on / off operation mechanism that operates the grounding device main body to switch between the on / off state and the on / off state.
The grounding device according to claim 1, further comprising an on / off holding mechanism that holds the grounding device main body in the on / off state switched by the on / off operation mechanism. The grounding device body
A movable contactor that makes electrical contact with the main circuit structure by moving it in a preset direction.
It has a first connecting portion provided on the movable contact and to which the on / off operation mechanism is detachably connected.
The on / off operation mechanism is
A second connecting portion that is detachably connected to the first connecting portion,
It has a moving means for moving the second connecting portion in the moving direction of the movable contactor.
The first connecting portion and the second connecting portion are connected by bringing the first connecting portion and the second connecting portion relatively close to each other in a state where the replacement unit is attached to the grounding device main body. The grounding device according to claim 3. One of the first connecting portion and the second connecting portion has a connecting convex portion that is urged to project and sink in a preset direction.
Either or the other of the first connecting portion and the second connecting portion has a connecting recess into which the connecting convex portion can be fitted, and a guide portion continuously formed toward the connecting recess.
The grounding device according to claim 4, wherein by bringing the first connecting portion and the second connecting portion relatively close to each other, the connecting convex portion is guided along the guide portion and fitted into the connecting concave portion. .. The grounding device according to claim 1, wherein the space is formed when the replacement unit is removed from the grounding device main body in the on state. A switchgear equipped with a housing that houses the main circuit structure through which current flows during power distribution.
Inside the housing
The grounding device according to any one of claims 1 to 6.
A switchgear in which at least one electrical device adjacent to the grounding device is arranged. A partition wall that partitions the inside of the housing and
An operation structure provided on one side of the partition wall and including the grounding device main body and the replacement unit.
It has the main circuit structure provided on the other side of the partition wall, and has.
The switchgear according to claim 7, wherein the replacement unit is detachably attached to the grounding device main body on one side of the partition wall. This is a grounding operation method for a grounding device that is placed adjacent to multiple electrical devices and grounds the main circuit structure through which current flows during power distribution.
The grounding device
A grounding device main body that switches between an on state in which the main circuit structure is grounded and an off state in which the main circuit structure is not grounded.
In the case of having a replacement unit detachably attached to the grounding device main body,
A step of removing the replacement unit from the grounding device main body in a state where the replacement unit is attached to the grounding device main body,
A grounding operation method comprising a step of forming a space adjacent to the electric device in a place where the replacement unit was present by removing the replacement unit from the grounding device main body.

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