JP2014096914A - Switch gear or method for exchanging breaker within switch gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch gear capable of promptly exchanging a component within the switch gear.SOLUTION: The switch gear comprises: a fixed contact; a movable contact which is brought into contact with or separated from the fixed contact; a plurality of circuit breaker units each including the fixed contact and the movable contact and being made into module; a plurality of manipulators respectively provided for each of the plurality of circuit breaker units; a bus; a cable; a circuit breaker unit connection conductor connecting the circuit breaker units; and a casing internally including at least a part of the plurality of circuit breaker units, the plurality of manipulators, the bus, the cable, and the circuit breaker unit connection conductor. The bus, the cable, and the circuit breaker unit connection conductor are all disposed at one face side within the casing, and the plurality of manipulators are all disposed at a side opposite to the one face within the casing.

Description

  The present invention relates to a switchgear or a circuit breaker replacement method in a switchgear, and more particularly to a switchgear that can speed up the replacement work.

  In the power receiving facility, a switchgear is provided that includes a switch that cuts off the power supplied from the bus bar and a cable that supplies power supplied from the bus bar to the load side. There are a variety of insulation methods for this switchgear. In addition to the conventional air-insulated switchgear and cubicle-type gas-insulated switchgear (GIS) using SF6 gas, solid insulation and compressed air are now being used from an environmental standpoint. Insulation and all-vacuum insulation systems have appeared, and various insulation systems have accelerated the miniaturization of components such as circuit breakers, disconnectors, and ground switches.

  Here, for example, Patent Document 1 discloses a switch unit that includes a switch and is unitized so as to be separable from the switchgear housing. According to the switch unit, an air ground disconnection part, a vacuum valve that is electrically connected to the air insulated ground disconnection part and that supplies and shuts off current in a vacuum container with a vacuum inside, are integrated with these. A solid insulator that is molded into

  Moreover, there exists what was described in patent document 2, for example as what modularized the switch unit. The main circuit portion of the switchgear is configured by combining each switch such as a circuit breaker, a disconnect switch, a ground switch, and further a bus bar, all of which are formed into a solid insulation unit.

JP 2011-41407 A JP 2007-306791 A

  Patent Document 1 describes a portion corresponding to the switch unit referred to in the present specification, and does not mention how to configure the switchgear.

  Further, although Patent Document 2 describes a modular switch unit, there is room for improvement in terms of quick replacement of components inside the switchgear when maintenance is taken into consideration.

  And when changing the circuit breaker inside one switchgear (of a plurality of switchgears) depending on the customer, in the situation where power transmission other than the circuit breaker to be replaced cannot be cut off, It may be necessary to replace the vessel. In this case, for the switchgear, the circuit breaker must be replaced while the bus is not interrupted.

  The present invention has been made in view of the above points, and a first object of the present invention is to provide a switch gear that can quickly replace components inside the switch gear. In addition, a second object of the present invention is to provide a circuit breaker replacement method in a switchgear that replaces a circuit breaker without powering down the bus.

  In order to solve the above problems, a switchgear according to the present invention includes a fixed contact, a movable contact that contacts or separates from the fixed contact, the fixed contact, and the movable contact, each of which is modularized. A plurality of switch units, a plurality of operating units provided for each of the plurality of switch units, a bus, a cable, a connection conductor between switch units connecting the switch units, and the plurality of switch units A switch unit, a plurality of operation devices, the bus, the cable, and a housing having at least a part of the connection conductor between the switch units inside, the bus, the cable, and the connection conductor between the switch units are These are all arranged on one surface side in the enclosure, and the plurality of operating devices are all arranged on the opposite side of the one surface in the enclosure.

  In order to solve the above problems, a circuit breaker replacement method in a switchgear according to the present invention includes a bus, a fixed contact, a movable contact that contacts or separates from the fixed contact, and the fixed contact. And a plurality of switch units each modularized, a circuit breaker provided in at least one of the plurality of switch units modularized, the busbar and the circuit breaker A switchgear repair method comprising a disconnector disposed between the busbars and a grounding switch disposed on the opposite side of the busbar from the disconnector, the switchgear being operated The step of disconnecting between the bus bar and the circuit breaker, the step of operating the grounding switch to ground the conductor in the circuit breaker after the step of disconnecting, and the circuit breaker In-vessel guidance A step of removing the circuit breaker after the step of grounding, a step of attaching a circuit breaker after repair or a new circuit breaker after the step of removing the circuit breaker, and a circuit breaker after repair or a new circuit breaker. After the step of mounting, the step of operating the grounding switch to release the conductor in the circuit breaker from the grounded state and the step of releasing the conductor in the circuit breaker from the grounded state are performed by operating the disconnector. It has the step which supplies electricity between the said bus-bar and the said circuit breaker.

  According to the switchgear according to the present invention, it is possible to quickly replace the components inside the switchgear. Moreover, according to the circuit breaker replacement method in the switchgear according to the present invention, it is possible to replace the circuit breaker without powering off the bus.

It is a sectional side view of the switchgear in Example 1. It is a single wire connection diagram of the switchgear in Example 1. It is a sectional side view of various mold switches. It is sectional drawing which shows operation | movement of a three-position type | mold (electric current supply disconnection path ground preparation) disconnecting switch. It is a sectional side view of the switchgear in Example 2. It is a single wire connection diagram of the switchgear in Example 2. It is a sectional side view of the switchgear in Example 3. It is a single wire connection diagram of the switchgear in Example 3.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. The following are merely examples and are not intended to be construed as limiting the invention content to specific embodiments.

  A first embodiment will be described with reference to FIGS. The structure of the present embodiment can be used as a feeder board. As shown in FIG. 1, the switch gear according to the present embodiment has three mold switches arranged in the height direction in the vicinity of the center in the depth direction (direction perpendicular to the paper surface in FIG. 1) in the housing 20. ing. The mold switch corresponds to the disconnect switch mold switch 1, the breaker mold switch 2, and the grounding device mold switch 3 from above. In addition, although each mold switch (1-3) is not shown in figure, it is arrange | positioned for three phases in the direction perpendicular | vertical to the paper surface, and each phase is insulated and phase-separated. That is, the switch gear shown in FIG. 1 has a total of nine molded switches (three / phase × three phases).

  Each mold switch is formed by molding the surface of a switch (not including all), such as a ground disconnector 10, a circuit breaker 11, and a ground switch 12, with a solid insulating resin 7, 8, 9. Is done. And the conductive layer is apply | coated to the surface of the said solid insulation resin, and the improvement of safety | security is aimed at by making this conductive layer into a grounding potential.

  The mold switch 1 includes a bus-side fixed contact 16, a movable-side fixed contact 17, and a ground-side fixed contact 51 as fixed contacts, and each movable contact 18 is movable by being connected to the operating device 4 side. The earthing disconnector 10 which switches an energized state, a disconnection state, and a grounding preparation state is provided.

  The energization state, disconnection state, and grounding preparation state as the ground disconnector 10 are shown in FIG. However, the structure shown in FIG. 4 is different from the mold switch 1 in that the movable side fixed contact 17 is connected to the circuit breaker. As will be described later, the molded switch can be formed by combining various types of ground disconnectors, disconnectors, circuit breakers, and ground switches. In FIG. The case where it formed is shown. However, looking at the ground disconnector alone, there is no difference between using the circuit breaker and connecting conductors that do not have a switching function in terms of switching between energization, disconnection, and ground preparation. . In the ground preparation state, among the conductors drawn from the mold switch, the conductor opposite to the bus (in the mold switch, the bushing conductor 22 and the switch unit connecting conductor 14 are applicable) and the movable side fixed contact 17. Is in a grounded state.

  The case where the movable contact 18 is in contact with the bus-side fixed contact 16 and the movable-side fixed contact 17 is an energized state, and the bus-side fixed contact 16 and the movable-side fixed contact 17 are electrically connected via the movable contact 18. The Further, the position (state) where the movable contact 18 operates in the direction away from the bus-side fixed contact 16 and away from the movable side fixed contact 17 and has a surge withstand voltage is the disconnected state. At this time, of course, the bus-side fixed contact 16 and the movable-side fixed contact 17 are not conductive. When the movable contact 18 operates further in the direction away from the bus-side fixed contact 16 than the disconnected state, and the movable contact 18 is in contact with the movable-side fixed contact 17 and the ground-side fixed contact 51, the ground preparation state ( Or, the conductor on the side opposite to the bus bar and the movable side fixed contact 17 among the conductors drawn from the mold switch are in a grounded state). At this time, the movable contact 18 is at the ground potential via the ground-side fixed contact 51 which is the ground potential, and the movable-side fixed contact 17 electrically connected to the movable contact 18 is also at the ground potential (ground state). In this case, among the conductors drawn from the mold switch, the conductor on the side opposite to the bus and the conductor connected thereto are also at ground potential).

  The mold switch 1 includes a conductor 19 connected to the movable fixed contact 17, a connection conductor 21 connected to the conductor 19, arranged in parallel with the movable contact 18, and entirely covered with the solid insulating resin 7. The bushing conductor 22 is drawn out from the connection conductor 21 and connected to one end of the switch unit connection conductor 14 (bus side) described below. Here, the ground preparation state when the movable side fixed contact 17 is connected in series with the circuit breaker (not limited to the case where the circuit breaker and the movable side fixed contact are connected within one mold switch) Although the movable contact 18 is set to the ground potential, the circuit breaker (the circuit breaker 11 in this embodiment) arranged in series with the movable contact 18 on the cable side is in the cut-off position and is not turned on. Show. That is, “preparation” indicates that the grounding state is immediately established by turning on the circuit breaker. In the structure shown in this embodiment, the cable 47 can be grounded by turning on the circuit breaker 11.

  For each mold switch, on the front side of the switch gear (right side in FIG. 1) in the housing 20, operating devices 4, 5, and 6 for operating the three-phase mold switches collectively are arranged (of course, three-phase). The minute does not have to be operated at once with one operation device, and an operation device may be provided for each switch).

  The mold switch 2 is disposed so as to face the fixed contact 23, the movable contact 24 that contacts or separates from the fixed contact 23, and the inside in which the fixed contact 23 and the movable contact 24 are accommodated is a vacuum. A container 25 is provided. The fixed contact 23 is connected to a bushing conductor 37 connected to the other end of the switch unit connecting conductor 14 (bus side). The bushing conductor 37 is drawn out from the inside of the solid insulating resin 8. The vacuum vessel 25 is for the circuit breaker 11, and the current can be turned on or off when the movable contact 24 contacts or separates from the fixed contact 23 in the vacuum vessel 25. The movable contact 24 is connected to the operating device 5 side, and can perform an operation such as contact or separation with respect to the fixed contact 23. The movable contact 24 is connected to the flexible conductor 27 via the movable conductor 26, and thus can be energized while operating. The flexible conductor 27 extends in parallel with the driving direction of the movable contact 24 and is connected to a connection conductor 29 that is entirely covered with the solid insulating resin 8. The connection conductor 29 is drawn from the solid insulating resin 8. The bushing conductor is connected to one end of the switch unit connecting conductor 14 (cable side) described below. The mold switch 2 is formed by covering the periphery of the vacuum container 25, the movable conductor 26 and the bushing conductor 37 with the solid insulating resin 8.

  The mold switch 3 is disposed so as to face the fixed contact 31, the movable contact 32 that contacts or separates from the fixed contact 31, and the inside in which the fixed contact 31 and the movable contact 32 are housed is a vacuum. A container 33 is provided. The fixed contact 31 is connected in the middle of the connecting conductor 30, and one end of the connecting conductor 30 is a bushing conductor connected to the other end of the switch unit connecting conductor 14 (cable side). Furthermore, the other end becomes a bushing conductor connected to the cable head 15 described below. A portion of the connecting conductor 30 connected to the switch unit connecting conductor 14 and the cable head 15 is drawn from the solid insulating resin 9. The movable contact 32 is connected to the flexible conductor 35 via the movable conductor 34, so that it can be energized while operating. The flexible conductor 35 is connected to a ground portion 36 having a ground potential. Thereby, the movable contact 32 is always at ground potential. The movable contact 32 is connected to the operation device 6 side and can perform an operation such as contact or separation with respect to the fixed contact 31. The vacuum vessel 33 is for the ground switch 9, and current can be input or grounded when the movable contact 32 contacts or is separated from the fixed contact 31 in the vacuum vessel 33. The mold switch 3 is formed by covering the periphery of the vacuum vessel 33, the movable conductor 34 and the connecting conductor 30 with the solid insulating resin 9.

  In this embodiment, three switch switches that are in the same phase and an operating device that collectively operates the mold switches that are in the same phase are configured as one switch unit, and the switchgear shown in FIG. Then, it is composed of a total of three switch units 42, 43, 44 for three phases. Any one of the solid insulated bus 13, the inter-switch unit connecting conductor 14, and the cable head 15 can be connected to the back side (left side in FIG. 1) of each mold switch in the housing 20, that is, the side opposite to the operation unit. A bushing is provided. The bushing has a structure in which any of the solid insulation bus 13, the inter-switch unit connecting conductor 14 and the cable head 15 can be connected. In particular, in this embodiment, the bushings have the same shape. Of course, there is no problem as long as the solid insulation bus, the switch unit connecting conductor, and the cable head can be connected to each other even if they are not the same shape.

  The inside of the switchgear is divided for each function by a grounded metal plate (whether the surface is a grounded partition or not) 45 and 46, and the rear side is a busbar from above. The partition part 38, the switch unit connection partition part 39, and the cable partition part 40 are formed. By partitioning with a metal plate, when accessing the inter-switch unit connecting section 39 or the cable section 40 in a state where the bus is charged, the bus section 38 is not touched by mistake, and the ground metal Therefore, safety is maintained even if the ground metal itself is touched. Moreover, by partitioning each function, the parts to be worked on at the same time are aggregated, which is useful for work. The switch gear front side is a switch section 41 and the above-described switch units 42, 43, and 44 are arranged. In the present embodiment, the switch units are stacked with a plurality of switch units 42, 43, 44 in the height direction so that the longitudinal direction is in the horizontal direction. By doing so, it is not too long in the longitudinal direction, the ground contact area can be reduced, and the height can be lowered. Therefore, it contributes to miniaturization as a whole.

  A three-phase solid insulation bus 13 is disposed in the bus section 38 and is connected to the bus-side fixed contact 16 (or the bus-side fixed contact 16 in the mold switch 1 of the corresponding phase. The bushing conductor to be drawn out).

  The bushing conductor 22 drawn out from the solid insulating resin 7 in the mold switch 1 is introduced not into the bus bar section 38 but into the switch unit connection section 39. And it connects with the end of the switch unit connecting conductor 14 (bus-line side) in the switch unit connecting section 39. The other end of the switch unit connecting conductor 14 (bus side) is connected to the bushing conductor 37 drawn from the mold switch 2. A part of the connection conductor 29 is drawn from the other end of the mold switch 2 and is connected to one end of the switch unit connection conductor 14 (cable side).

  The other end of the switch unit connecting conductor 14 (cable side) is connected to one end of the connecting conductor 30 drawn from the mold switch 3. The other end of the connecting conductor 30 is drawn out to the cable partition 40 and connected to the cable 47 through the cable head 15.

  The switch gear in this embodiment is connected to the switch unit connecting conductor 14 (bus side) from the solid insulated bus 13 through the mold switch 1, and further to the mold switch 2, switch unit connecting conductor 14 (cable side), A series circuit for supplying power to the cable 47 via the mold switch 3 and the cable head 15 is formed.

  FIG. 2 is a single line connection diagram in this embodiment. The solid insulated bus 13 is connected to the ground disconnector 10, connected to the circuit breaker 11 via the switch unit connecting conductor 14 (bus side), and further grounded via the switch unit connecting conductor 14 (cable side). A state in which both the switch 12 and the cable head 15 are connected is shown.

  FIG. 3 shows a variation of the mold switch. As shown in the figure, various switches can be included without changing the mold for casting the solid insulating resin. In this figure, 1 disconnector, 2 circuit breaker, 3 grounding switch, 4 combination of circuit breaker and disconnector are illustrated, and since all mold switches have the same external shape, switch unit It is possible to attach either of them. That is, the variation of the switch unit can be increased. In this embodiment, a mold switch is constituted by a combination of a circuit breaker, a ground switch, and a ground disconnector. Whether to use a disconnector or a ground disconnector can be changed depending on whether or not a ground-side fixed electrode that is a ground potential is provided on the operating device side.

  A circuit breaker replacement method for the switchgear configured as described above will be described.

  In this case, it is necessary to first disconnect between the bus bar 13 and the circuit breaker 11 to be replaced. In the present embodiment, the transition to the disconnecting state is performed by operating the movable contact 32 in the circuit breaker 11 from the energized state, opening the contact from the fixed contact 31 that has been in contact, and entering the disconnecting state. The movable contact 18 is operated to move away from the fixed contact 16 that has been in contact, and the ground disconnector 10 is moved to the disconnection position. When the disconnector itself also has a breaking performance, it is not necessary to open the breaker separately and operate the disconnecting device after passing through the breaking state. It is possible to make a disconnected state.

  After the disconnection state, the ground switch 12 is operated to bring the conductor in the circuit breaker 11 into the ground state. In the grounded state, the movable contact 32 and the fixed contact 31 in the circuit breaker 11 are required to be closed so as not to have a residual charge (or even if the contact is opened for some reason, Once both contacts are grounded, residual charge is required).

  After the circuit breaker 11 is grounded, the circuit breaker is removed. At this time, the bus 13 is charged, but the circuit breaker 11 is disconnected from the bus and is grounded. In the present embodiment, the circuit breaker 11 and the operating device 5 are both included in the switch unit 43, and it is not necessary to remove the operating device 5 from the circuit breaker 11 when removing the circuit breaker 11.

  After removing the circuit breaker, install a circuit breaker after repair or a new circuit breaker (in other words, not necessarily a new one). Also in this case, in this embodiment, both the circuit breaker 11 and the operation device 5 are included in the switch unit 43, and it is not necessary to attach the operation device 5 from the circuit breaker 11 when the circuit breaker 11 is installed.

  After the step of attaching the circuit breaker after repair or a new circuit breaker, the ground switch 12 is operated to release the conductor in the circuit breaker 11 from the ground state. This is because a ground fault will occur if the grounding state is maintained when the disconnection state is changed to the closing state in the subsequent processes.

  Finally, the disconnection state is shifted to the closing state. In the present embodiment, the transition from the disconnecting state to the closing state is performed by operating the movable contact 32 in the circuit breaker 11 after replacement from the energized state to open the contact from the fixed contact 31 that has been in contact, and then the ground disconnector. 10 movable contacts 18 are operated and brought into contact with the fixed contact 16 which has been separated, and the ground disconnector 10 is moved to the contact position. And it operates by operating the movable contact 32 in the circuit breaker 11 after replacement | exchange, and making it contact the fixed contact 31. FIG. Thereby, it is not necessary for the earthing disconnector 10 to be provided with the input capacity, and it is sufficient if the circuit breaker 11 is provided. In addition, when the disconnecting device itself also has the closing performance, it is not necessary to open the circuit breaker separately, and it is not necessary to perform the closing in the circuit breaker, and the disconnecting device can be directly turned on to enter the closing state. Is possible.

  According to the circuit breaker removal method described in the present embodiment, the grounding disconnector 10 (which may be simply a disconnector) is operated to disconnect between the bus bar 13 and the circuit breaker 11, and then the grounding switch 12 is operated. Then, the conductor in the circuit breaker 11 is grounded, and then the circuit breaker 11 is removed, so that the circuit breaker 11 can be removed while the bus bar is charged. According to the circuit breaker mounting method described in this embodiment, after removing the circuit breaker 11, a repaired circuit breaker or a new circuit breaker is mounted, and then the ground switch 12 is operated to operate the circuit breaker. The conductor is released from the grounded state, and the grounding disconnector 10 (which may be simply a disconnector) is operated to energize between the busbar 13 and the circuit breaker 11 so that the circuit breaker 11 is attached with the busbar charged. It becomes possible. That is, by performing both methods together, it becomes possible to replace the circuit breaker 11 while the busbar is charged.

  In order to realize the above replacement method, in the present embodiment, at least one of the modularized switch units 42-44 is provided with a circuit breaker, and between the bus bar 13 and the circuit breaker 11. Includes a grounding disconnector 10 (may be a disconnector) disposed on the busbar 13 side, and a grounding switch 12 disposed on the opposite side of the busbar 13 with respect to the grounding disconnector 10, and the device (module) The above replacement method is realized by the fact that it is not necessary to include a switch unit.

  In addition, according to the present embodiment, the bus bar 13, the cable 47, and the switch unit connecting conductor 14 are all arranged on one surface side in the housing 20 to improve on-site installation workability. I can do it. Improving the installation workability can reduce the risk of erroneous contact with the charged member and also speed up the work. In addition, according to the present Example, members other than bus-bar 13, cable 47 (plus cable head 15) and switch unit connecting conductor 14 are not provided, and it is possible to further speed up the work. . In the present embodiment, the plurality of operation devices 4-6 are all disposed in the housing 20 on the side opposite to the surface on which the bus bar 13, the cable 47, and the switch unit connecting conductors 14 are disposed. A switch mechanism with many maintenance and inspection items is arranged on the front side of the switchgear. As a result, the switch gear door can be opened and easily inspected, and the main circuit charging unit such as the bus bar 13, the cable 47 (plus the cable head 15) and the switch unit connecting conductor 14 is connected to the mechanism unit. It does not exist in the area (the area in front of the switchgear), ensuring safety (preventing electric shock) during maintenance and inspection.

  According to the present embodiment, the switch units 42-44 are accommodated in the switch compartment 41, the bus 13 is accommodated in the bus compartment 38, and the switch unit connecting conductor 14 is provided between the switch units. 39, and the cable 47 is stored in the cable partition 40, and the partitions are partitioned by a grounded partition, and the work objects to be worked on at the same time are gathered, and the installation workability of the site is also reduced. Can be improved. In particular, even if it touches an erroneously grounded partition, it does not cause an electric shock and greatly contributes to safety. Further, although not particularly mentioned in the above embodiment, it is preferable that the partition position can be changed by providing a plurality of support portions. Even if it is desired to change the partition position for some reason, if the partition position can be changed, it is possible to respond immediately on site.

  Further, according to the present embodiment, each of the plurality of operating devices is provided inside the modularized switch unit, and each operating device is modularized together with the movable contact to be operated. It is possible to replace the switch and the operation unit, such as the switch and the ground switch, and it is possible to replace the switch unit by switch unit, thus enabling quick replacement. If the controller is not included in the switch unit, it will be necessary to remove the switch between the switch and the switch on site at the time of removal. Since work will occur, it will take a lot of time locally. According to the present configuration, such anxiety can be reduced and useful.

  Such a quick exchange is particularly useful when there is a restriction on the exchange time, particularly in the railway field. In the railway field, replacement work that leads to power outages must be done after the last train has passed and before the next first generation car arrives, so that the time required for replacement in the field is very short. Is important to.

  A second embodiment will be described with reference to FIGS. 5 and 6. The structure of this embodiment can be used as a power receiving panel. In this embodiment, a switch unit 53 is used instead of the switch unit 43 in the first embodiment. About other points, it is the same as that of Example 1, and duplication description is abbreviate | omitted.

  As shown in FIG. 4, the switch unit 53 includes a mold switch 52, and the mold switch 52 is not only the circuit breaker 11 described in the first embodiment, but also a ground disconnection portion 54 (may be simply a disconnector). Is used. As shown in FIG. 5, the ground disconnection portion 54 can be switched to the disconnect position and the ground position in addition to the energization position.

  The external shape of the switch unit 53 in the present embodiment is the same as that of the switch unit 43 in the first embodiment, and the circuit configuration can be changed without affecting the arrangement of other members.

  Needless to say, the configuration of the present embodiment can also achieve the same effect as the configuration described in the first embodiment.

  A third embodiment will be described with reference to FIGS. The structure of the present embodiment can be used as a double bus board. Description of points that overlap the points described above will be omitted. In the present embodiment, as shown in FIG. 6, in the switchgear in the second embodiment, another switch unit 60 is further added between the switch unit 42 and the switch unit 53, and the bus bar is added to the bus bar 13. A bus 63 is provided to form a double bus. The switch unit 60 is arranged in parallel with the switch unit 42, and both switch units play the same role on the circuit as shown in FIG. The switch unit 60 includes a mold switch 66 having a ground disconnection portion 69, and the bus-side fixed contact 68 in the ground disconnection portion 69 is connected via the bushing conductor 22 and the switch unit connecting conductor 65. . Other basic points are the same between the switch unit 42 and the switch unit 60. The inter-switch unit connecting conductor 65 is further connected to the inter-switch unit connecting conductor 64 disposed on the back side of the single bus 63 of the double bus, and the inter-switch unit connecting conductor 64 is provided in the mold switch 52. It is electrically connected to the fixed contact side of the circuit breaker. The switching unit connecting conductor 64 is shifted so as not to overlap the bus 63 by passing the back side of the bus 63. Further, on the back side of the housing 70 in the present embodiment, the switch unit 53 and the switch unit 44 are partitioned by a ground metal plate 67, and the inter-mold switch connection partition 39 in the first embodiment It is divided into a first inter-mold switch connection section 71 on the unit 53 side and a second inter-mold switch connection section 72 on the switch unit 44 side.

  For switchgear like this embodiment, even when the circuit breaker is replaced, the disconnection operation performed for one bus may be performed continuously for other buses, and until the transition to the disconnection state occurs. There is no particular difference except that the operation and the operation from the disconnection state to the closing state after replacement must be performed for each of the switch units 42 and 60.

  Needless to say, the configuration of the present embodiment can also achieve the same effect with respect to having the same configuration as that described in each of the above embodiments.

  According to each of the above embodiments, the switch unit is modularized, and any one or combination of a circuit breaker, a disconnecting switch (including a ground disconnecting switch), a grounding switch is possible (of course. It is also possible to combine with a conductor that does not have a circuit switching function, such as the mold switch 1.) By combining these, it is possible to cope with various circuits. That is, it is possible to flexibly change the switch gear according to the customer's installation environment.

  Further, according to each of the above embodiments, the plurality of modular switch units have the same outer shape and the same restrictions on the space even if the arrangement is changed, so that the degree of freedom in layout is high. . This point is the above point {a point where a switch unit is modularized, and a circuit breaker, a disconnector (including a ground disconnector), a ground switch, or any combination thereof can be used} When applied together, the degree of freedom in layout can be made extremely high, which is very suitable.

1, 2, 3 Mold switch 4, 5, 6 Controller 7, 8, 9 Solid insulation resin 10 Ground disconnector 11 Circuit breaker 12 Ground switch 14 Switch unit connecting conductor 15 Cable head 16 Bus side fixed contact 17 Movable side Fixed contact 18 Movable contact 19 Conductor 20 Housing 21 Connection conductor 23, 31 Fixed contact 24, 32 Movable contact 25, 33 Vacuum vessel 26, 34 Movable conductor 27, 35 Flexible conductor 29 Connection conductor 30 Connecting conductor 36 Grounding portion 37 Bushing conductor 38 Bus section 39 Switch unit connection section 40 Cable section 41 Switch section 42, 43, 44 Switch unit 45, 46 Metal plate 47 Cable 52 Mold switch 53 Switch unit 54 Ground disconnecting section 60 Switch unit 63 Busbar 64, 65 Switch unit connection conductor 66 Mold switch H 67 Grounding metal plate 68 Bus-side fixed contact 69 Grounding disconnecting part 70 Housing 71 First mold switch connection partition 72 Second mold switch connection partition

Claims (9)

A fixed contact and a movable contact that contacts or separates from the fixed contact;
A plurality of switch units each having the fixed contact and the movable contact, each modularized;
A plurality of operating units provided for each of the plurality of switch units;
A bus bar, a cable, and a connection conductor between switch units for connecting the switch units;
A housing having at least a part of the plurality of switch units, the plurality of operation devices, the bus, the cable, and the connection conductors between the switch units,
The bus bar, the cable and the connection conductor between the switch units are all arranged on one surface side in the casing,
The switchgear is characterized in that the plurality of operating devices are all arranged on the side opposite to the one surface in the casing. The switchgear according to claim 1,
The switch gear, wherein each of the plurality of operating devices is provided inside the modular switch unit. The switchgear according to claim 1 or 2,
The switchgear unit that is modularized has a switch breaker, a disconnector, a ground switch, or any combination thereof. The switchgear according to any one of claims 1 to 3,
The switchgear characterized in that the plurality of the switch units modularized have the same outer shape. The switchgear according to any one of claims 1 to 4,
A switchgear, wherein a plurality of modularized switch units have the same connection shape with respect to the bus bar, the cable, or the connection conductor between the switch units. The switchgear according to any one of claims 1 to 5,
The switch unit is housed in a switch compartment;
The busbar is stored in a busbar section,
The switch unit connecting conductor is housed in the switch unit connecting partition section,
The cable is housed in a cable compartment;
The switchgear is characterized in that the partition portions are partitioned by a grounded partition. The switchgear according to claim 6, wherein
The switchgear is characterized in that the partitioning position can be changed. The switchgear according to any one of claims 1 to 7,
At least one of the plurality of the switch units modularized includes a circuit breaker,
A switchgear comprising a disconnector disposed on the busbar side and a grounding switch disposed on the side opposite to the busbar with respect to the disconnector between the busbar and the circuit breaker. . A bus, a fixed contact, and a movable contact that contacts or separates from the fixed contact;
A plurality of switch units each having the fixed contact and the movable contact, each modularized;
A circuit breaker provided in at least one of the plurality of switch units modularized;
A switchgear repair method comprising: a disconnector disposed between the busbar and the circuit breaker and disposed on the busbar side; and a ground switch disposed on the opposite side of the busbar from the disconnector. And
Operating the disconnector to disconnect between the bus bar and the breaker; and
After the step of disconnecting, operating the ground switch to ground the conductor in the circuit breaker; and
Removing the circuit breaker after the step of grounding the conductor in the circuit breaker;
After the step of removing the circuit breaker, installing a circuit breaker after repair or a new circuit breaker;
After the step of installing a circuit breaker after repair or a new circuit breaker, operating the ground switch to release the conductor in the circuit breaker from the ground state;
A circuit breaker replacement method in a switchgear comprising the step of operating the disconnector to energize between the bus bar and the circuit breaker after the step of releasing the conductor in the circuit breaker from the ground state .