JP4460801B2 - Combined gas insulated switchgear - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas insulated switchgear provided with switches in a container filled with an insulating gas, and more particularly to a composite gas insulated switchgear including a plurality of power switches.
[0002]
[Prior art]
Various types of composite gas insulated switchgear in which a large number of switches (switchers) such as a circuit breaker, a disconnector, and a grounding device are configured in a container filled with an insulating gas have been known. Among them, as a typical example, a composite gas insulated switchgear disclosed in US Pat. No. 5,841,087 will be described with reference to FIG. That is, in this composite gas insulated switchgear, SF ₆ The disconnect device 1 is accommodated in a grounded metal container 2 filled with an insulating gas such as a gas.
[0003]
In this disconnecting device 1, fixed electrodes 3 and 4 that form contacts are fixed to flanges 5 and 6 formed on the ground metal container 2 via insulating spacers. A fixed electrode 8 electrically connected to the ground metal container 2 is fixed to the flange 7 formed on the ground metal container 2. Contact points 15, 16, and 17 are constituted by the columnar movable electrodes 12, 13, and 14 that are paired with the fixed electrodes 3, 4, and 8, respectively. The movable electrodes 12, 13, and 14 are electrically and electrically connected to the current terminal 11 by a metal container 18 and a sliding contact not shown. The current terminal 11 is connected to another device (not shown) such as a circuit breaker. The conductors of the main bus are connected to the fixed electrodes 3 and 4, respectively. Therefore, the contacts 15 and 16 serve as main bus selection disconnectors. Further, since the fixed electrode 8 is at the ground potential, the contact 17 becomes a grounding device.
[0004]
The drive mechanism 19 that drives the movable electrodes 12, 13, and 14 is configured to keep the airtightness of the insulating gas inside the grounded metal container 2, and linearly reciprocates as the drive shaft 10 rotates. And cams 20 and 21 that are not shown, and a lever that acts on each cam. The drive mechanism 19 is connected to each of the movable electrodes 12, 13, and 14 and has a role of transmitting the rotational driving force of the drive shaft 10 to the movable electrodes 12, 13, and 14.
[0005]
[Problems to be solved by the invention]
However, in the conventional composite gas insulated switchgear as described above, the contacts 15 and 16 that serve as two disconnectors are provided inside the same ground metal container 2, and the movable electrodes 12, 13, 14 is configured to be driven by a common drive mechanism 19. For this reason, when one of the disconnectors fails, it is not possible to replace only the failed disconnector, and it is necessary to replace both disconnectors at the same time. For this reason, the cost required for replacement increases.
[0006]
In addition, when replacing, it is necessary to carry out disassembly and assembly on site, and the time required for replacement becomes longer. On the other hand, when the method of replacing this entire device including the circuit breaker is taken, a large device is transported in an assembled state, which requires a great deal of cost.
[0007]
In the above-described prior art, since the contacts 15 and 16 functioning as two disconnectors are arranged in the same gas section, there is no gas section between the contacts 15 and 16, and in this state, each contact 15 and 16 are connected to the double bus without passing through other contacts. In such a configuration, for example, when there is a lightning strike on one bus bar and it enters the disconnecting device unit, and when a breakdown occurs in the disconnecting device unit, a ground fault occurs, this gas compartment is connected via another contact point. All connected systems without power transmission become impossible. When both of the double buses are stopped in this manner, even if one of the buses becomes unable to transmit power, the original purpose of the double bus that enables power transmission on the other bus cannot be achieved.
[0008]
The present invention has been proposed to solve the above-mentioned problems of the prior art, and its main purpose is not only to minimize the cost required for replacement in the event of a single contact failure. An object of the present invention is to provide an inexpensive composite gas insulated switchgear that can minimize the time required for replacement.
Another object of the present invention is to provide a composite gas insulated switchgear that can be applied to a power transmission system having a double bus configuration without impairing its original meaning.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a composite gas comprising a plurality of switchgears each provided with a contact made of electrodes that can be contacted and separated in an insulating container filled with an insulating gas. The insulated switchgear has the following technical features.
[0010]
That is, according to the first aspect of the present invention, the plurality of opening / closing devices are connected to a common conductive container made of a conductive material, and the conductive container is supported by an insulating structure made of an insulator. In addition, the insulating structure is supported by a support structure made of a conductive material, and a grounding device having a fixed electrode and a movable electrode that can contact and separate from each other is disposed in the insulating structure. It is characterized by that. In the invention of claim 1 as described above, since the switchgear configured in the container made of an insulator can be easily separated from and connected to the conductive container, when any one of the switchgears fails Even so, it is extremely easy to replace only that device. Therefore, the time required for replacement can be shortened and the cost for replacement can be reduced. Further, since the conductive container can be appropriately grounded to the ground potential by the grounding device, the replacement work can be performed safely. Moreover, since the insulation from the ground potential of the electrode which becomes a high voltage is performed by an insulating structure, it is not necessary to consider the ground insulation of each switchgear, and an inexpensive device can be configured.
[0011]
The invention of claim 2 is the composite gas insulated switchgear of claim 1, wherein at least one of the plurality of switchgears is a disconnector.
In the invention of claim 2 as described above, because the substation equipment includes a disconnector in most cases due to the characteristics of the structure, by combining a small number of combined gas insulated switchgear, It can also be applied to such a substation configuration.
[0012]
The invention of claim 3 is the composite gas insulated switchgear according to claim 1 or 2, wherein at least one of the plurality of switchgears is a circuit breaker.
In the invention of claim 3 as described above, the substation equipment has the second most configuration including a circuit breaker due to the characteristics of the configuration, and therefore, by combining a small number of combined gas insulated switchgears, It can also be applied to such a substation configuration. For example, the basic configuration of various devices connected to double busbars can be made the same, and the range of applications can be widened, and the number of required composite gas insulated switchgears can be minimized. it can.
[0013]
According to a fourth aspect of the present invention, the grounding device includes a fixed electrode and a movable electrode that can contact and separate from each other, the fixed electrode is fixed to the conductive container, and the insulating structure is a conductive support structure. The movable electrode is provided so as to be slidable and energized with respect to the support structure. In the invention of claim 4 as described above, the conductive container supporting each switchgear can be directly grounded by sliding the movable electrode until it contacts the fixed electrode. Also, even when an abnormal overcurrent flows to the movable electrode during grounding, it is supported by the support structure, so it is not deformed or displaced by electromagnetic force, and it maintains reliability. Can do.
[0014]
According to a fifth aspect of the present invention, in the composite gas insulated switchgear according to the fourth aspect, the movable electrode is provided outside the insulating structure.
In the invention of claim 5 as described above, since the movable electrode is provided outside the insulating structure, the grounding state can be confirmed directly by the operator's eyes. Accordingly, it is possible to prevent a situation in which inspection work or replacement of the failure switchgear is performed in a state where the ground is not inadvertently grounded, and thus safe work is possible.
[0015]
A sixth aspect of the present invention is the composite gas insulated switchgear according to the fourth or fifth aspect, wherein the movable electrode is provided so that a part of the movable electrode can be stored inside the support structure in the open state. It is characterized by being.
In the above invention of claim 6, when the grounding device is in the open state, the movable electrode is housed inside the support structure and is not affected by natural weather such as rain. Is prevented, and reliability is increased.
[0016]
A seventh aspect of the present invention is the composite gas insulated switchgear according to any one of the fourth to sixth aspects, wherein the support structure is provided with a sliding portion that slidably holds the movable electrode. In addition, a sealing member that maintains water tightness is provided between the sliding portion and the movable electrode, and a discharge portion that discharges water to the outside is provided at the upper portion of the sliding portion. And
In the invention of claim 7 as described above, even when the end of the movable electrode of the grounding device exposed to the atmosphere is exposed to rain, rainwater does not enter from the gap by the sealing member, and the entire movable electrode gets wet. Further, the rainwater is discharged by the discharge portion, and the rainwater does not stay at the end of the movable electrode, so that the reliability is improved.
[0017]
The invention according to claim 8 is the composite gas insulated switchgear according to claim 4, wherein the movable electrode and the fixed electrode are provided inside the insulating structure.
In the invention of claim 8 as described above, since the movable electrode and the fixed electrode of the grounding device are not exposed to the atmosphere, the reliability is improved.
[0018]
According to a ninth aspect of the present invention, in the composite gas insulated switchgear according to any one of the first to third aspects, the grounding device includes a fixed electrode and a movable electrode that can contact and separate from each other, and The fixed electrode is fixed to the metal container, the insulating structure is supported by a metal support structure, and one end of the movable electrode is provided to be rotatable and energized to the support structure. It is characterized by being.
In the invention of claim 9 as described above, since a structure for sliding the movable electrode is not required, the configuration is simplified and a cheaper device can be provided. Moreover, it becomes a structure strong with respect to the contamination from a sliding part and its clearance gap, and the penetration | invasion of rainwater.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
1. First embodiment
(Constitution)
The first of the present invention The embodiment will be described with reference to FIGS. 1 is a schematic cross-sectional view showing the overall configuration of the composite gas insulated switchgear according to the present embodiment, and FIG. 2 is a view showing details of a portion A in FIG. It is sectional drawing of a case.
[0022]
That is, as shown in FIG. 1, the composite gas insulated switchgear 30 according to the present embodiment includes two disconnectors 39 and 40 and one circuit breaker 43. The two disconnectors 39 and 40 are configured by connecting the disconnector contacts 35 and 36 constituted by the fixed electrodes 31 and 32 and the movable electrodes 33 and 34 to different insulating containers (hereinafter referred to as “insulating containers”) 37, respectively. 38. The circuit breaker 43 is obtained by housing the circuit breaker contact 47 in one insulating container 42.
[0023]
One end of each of these disconnectors 39, 40 and circuit breaker 43 is connected to the outside via external terminals 44, 45, 46, respectively. The other ends of the disconnectors 39 and 40 and the circuit breaker 43 are connected to the metal container 49 as follows. That is, the metal container 49 has a circular cross section, for example, and a plurality of flange surfaces are formed around it. For example, insulating containers 37, 38, and 42 are attached to the three upper flange surfaces adjacent to each other. The metal container 49 accommodates drive mechanisms 48 that interlock with the disconnector contacts 35 and 36 and the breaker contact 47, respectively. The metal container 49 corresponds to the conductive container recited in the claims and serves as a current path.
[0024]
The insulating containers 37 and 38 of the two disconnectors 39 and 40 are shielded from the metal container 49 via the partition walls 54 and 55, respectively, and the space on the circuit breaker 43 side is gas-comparted. . The circuit breaker 43 is located outside the disconnectors 39 and 40 with respect to the metal container 49, and the insulating container 50 and the metal container 49 of the circuit breaker 43 are configured to belong to the same gas section. Has been.
[0025]
On the other hand, the other flange surface of the metal container 49, for example, the lower flange surface, is supported by an upright insulating container 50 whose one end is at ground potential. The insulating container 50 corresponds to the insulating structure according to the claims. A mechanism box 41 that supports the ground potential side is connected to the insulating container 50. The mechanism box 41 is a metal box corresponding to the support structure of the claims, and an operation mechanism (not shown) is provided therein, and an operation bar (not shown) penetrating through the insulating container 50 is used. The drive mechanism 48 and the operation mechanism are connected.
[0026]
A grounding device 56 having a fixed electrode 57 and a movable electrode 58 is disposed outside the insulating container 50. The fixed electrode 57 is fixed to and electrically connected to the outer surface of the metal container 49. As shown in FIG. 2, the movable electrode 58 is slidably held in the energized sliding electrode storage case 59 corresponding to the sliding portion described in the claims, and can be stored in the mechanism box 41. Is provided. Packing 60a, 60b, which is a sealing member that keeps water tight, is provided between the energized sliding electrode storage case 59 and the movable electrode 58, and the dropped water is discharged to the upper end surface of the energized sliding electrode storage case 59. A notch 61 is provided as a discharge portion. In the energizing sliding electrode storage case 59, the movable electrode 58 and energizing sliding electrodes 62a, 62b, 62c having an energizing function are held and accommodated. The energizing sliding electrode storage case 59 is fixed to the lower part of the insulating container 50 and connected to the mechanism box 41.
[0027]
(Function)
The operation of the present embodiment having the above configuration will be described below. In other words, since the present embodiment is insulated from the ground side by the insulating container 50, in normal operation, current flows through the disconnector contacts 35 and 36 through the external terminals 44 and 45, and the metal container 49 and the circuit breaker are connected. The external terminal 46 is energized through the contact 47. When a general connection form is adopted, the external terminal 44 of one disconnector 39 is connected to one bus of the double bus, and the external terminal 45 of another disconnector 40 is connected to the other bus. The Further, the external terminal 46 of the circuit breaker 43 is connected to a line line such as a power transmission line or a bank line such as a transformer.
[0028]
Therefore, by adjusting the open / close state of each disconnector 39, 40, it is possible to select a line line connected to the external terminal 46 or a bus line connected to the bank line. When performing operations such as electric circuit interruption and disconnection, the drive mechanism 48 in the metal container 49 is operated via an operation rod driven by the operation mechanism, and the contacts 35, 36, and 47 are opened. . After the opening operation of each of the contacts 35, 36, 47, the external terminals 44, 45, 46 and the metal container 49 are insulated by the insulating containers 37, 38, 42.
[0029]
Then, by disconnecting the connection between the movable electrodes 33 and 34 and the drive mechanism 48 housed in the metal container 49, the disconnectors 39 and 40 can be easily removed from the metal container 49 while maintaining gas tightness. Can do. Since such a separation work can be performed, the work of attaching the disconnectors 39 and 40 to the metal container 49 is also facilitated. Similarly, the circuit breaker 43 can also be easily detached and attached from the metal container 49 by disconnecting the connection with the drive mechanism 48 housed in the metal container 49.
[0030]
In addition, as described above, when a basic configuration such as a line line or a bank line connected to a double bus is adopted, for example, there is a lightning strike on one bus and the switchgears 39, 40, etc. By entering one of them, even if a flashover occurs along with dielectric breakdown, the other switchgear is kept healthy because the gas compartment is different, and the power transmission system continues to live. Therefore, it does not become a situation where both double buses stop.
[0031]
Further, when the composite gas insulated switchgear 30 is inspected, the movable electrode 58 in the grounding device 56 is slid from the state housed in the mechanism box 41 to the position in contact with the fixed electrode 57, thereby allowing the metal container 49. Perform grounding. At this time, the metal container 49 supporting the disconnectors 39, 40 and the circuit breaker 43 can be directly grounded by the grounding device 56, and is movable even when an abnormal overcurrent flows to the movable electrode 58 during the grounding. The sliding direction of the electrode 58 is a direction perpendicular to the direction in which the electromagnetic force acts, and since the electrode 58 is held by a strong structure, the movable electrode 58 is detached, deformed, or displaced by the electromagnetic force. There is nothing to do.
[0032]
Furthermore, when the grounding device 56 is in an open state, the movable electrode 58 is housed inside the mechanism box 41, so that it is not affected by natural weather such as rain. Even when the grounding device 56 is in an open state, the tip of the movable electrode 58 is exposed to the atmosphere. Even if the tip hits the rain, the packing 60a, 60b keeps the watertight. Is prevented from getting wet, and the discharge of rainwater is promoted by the notch 61, so that rainwater does not stay at the tip of the movable electrode 58.
[0033]
(effect)
According to the present embodiment as described above, the disconnecting devices 39 and 40 and the circuit breaker 43 which are switching devices can be easily separated from the metal container 49 and connected by the insulating containers 37, 38 and 42, respectively. Therefore, even when one switchgear breaks down, it is very easy to replace only that device. Therefore, the time required for replacement can be shortened and the replacement work cost can be reduced.
[0034]
Insulation of the high voltage electrode from the ground potential is performed by the insulating container 50 that holds the metal container 49. Therefore, it is not necessary to individually consider the ground insulating structures of the disconnectors 39 and 40 and the circuit breaker 43, and an inexpensive combined gas insulated switchgear can be provided as a whole.
[0035]
Moreover, the insulation rod for operating the disconnectors 39 and 40 and the circuit breaker 43 is installed in the insulation container 50 filled with the insulating gas. Therefore, the movable electrodes 33 and 34 installed at a high potential can be driven by a short-length insulating rod from the operating mechanism on the ground potential side.
[0036]
Further, when a basic configuration such as a line line or a bank line connected to the double bus as described above is adopted, this portion is reduced by gas insulation, so that the entire substation is greatly reduced. And even if one of the buses becomes unable to transmit power, the meaning of the double bus configuration configured to enable power transmission with the other bus is not impaired. Type gas insulated switchgear. In particular, as the components of the substation include typical disconnectors and circuit breakers, it can be adapted to various substations by combining a small number of combined gas-insulated switchgears. Cost can be saved.
[0037]
In addition, even if one of the switchgears breaks down and a flashover occurs, the soundness of other equipment is maintained, so only the switchgear in which the problem has occurred needs to be replaced. It is economical including transportation of goods, and the time until replacement can be shortened.
[0038]
At this time, since the metal container 49 can be grounded to the ground potential by the grounding device 56, the replacement work can be performed safely. In particular, even when an abnormal overcurrent flows to the movable electrode 58 during grounding, the movable electrode 58 is prevented from being detached, deformed, or displaced, so that highly reliable grounding is possible and work safety is improved.
[0039]
And since the grounding device 56 is provided in the outer side of the insulating container 50, the condition of the grounding device 56 can be confirmed directly with an operator's eyes. Therefore, it is possible to prevent the inspection work or the replacement operation of the failure switchgear from being inadvertently grounded, thereby enabling a safe work. Further, when the grounding device 56 is in an open state, the movable electrode 58 is not affected by weather such as rain, and therefore, rusting and dust are not attached, and the reliability is further improved.
[0040]
2. Second embodiment
(Constitution)
The second of the present invention The embodiment will be described with reference to FIG. FIG. 3 is a schematic cross-sectional view showing the overall configuration of the composite gas insulated switchgear according to this embodiment. That is, the fixed electrode 57 of the grounding device 56 is fixed inside the insulating container 50 below the metal container 49. The movable electrode 58 of the grounding device 56 is slidably held in the energizing sliding electrode storage case 59 fixed inside the insulating container 50 above the mechanism box 41 and can be stored in the mechanism box 41. Is provided. Between the energized sliding electrode storage case 59 and the movable electrode 58, a packing (not shown) is provided to keep airtightness. The upper end of the energizing sliding electrode storage case 59 is not provided with a notch. Other configurations are the same as those in the first embodiment.
[0041]
(Function and effect)
In the present embodiment having the above-described configuration, the fixed electrode 57 and the movable electrode 58 of the grounding device 56 are not affected by atmospheric weather conditions because they are in the insulating container 50 filled with the insulating gas. . Therefore, the reliability of the grounding device 56 is increased, and the safety of inspection work and replacement work is further improved. Further, since the metal container 49 can be grounded in the best state without being exposed to the atmosphere, the state confirmation work of the grounding device 56 can be omitted. Furthermore, since the space between the electrodes of the grounding device 56 is located in a space filled with an insulating gas, the distance between the electrodes required at the time of opening can be shortened compared with the case where the material is located in the atmosphere. Time required can be shortened.
[0042]
3. Third embodiment
(Constitution)
The third of the present invention The embodiment will be described with reference to FIG. FIG. 4 is a schematic cross-sectional view showing the overall configuration of the composite gas insulated switchgear according to this embodiment. That is, the fixed electrode 57 of the grounding device 56 is fixed to the outside of the insulating container 50 below the metal container 49. One end of the movable electrode 58 in the grounding device 56 is configured to be rotatable about a fulcrum 58 fixed and electrically connected to the mechanism box 41. Other configurations are the same as those in the first embodiment.
[0043]
(Function and effect)
In the present embodiment as described above, when the grounding device 56 is opened, the movable electrode 58 is positioned at an angle away from the fixed electrode 57 as shown in FIG. At the time of grounding, the movable electrode 58 is rotated to an angle in contact with the fixed electrode 57 with the fulcrum 58 as an axis. With such a structure, a structure for sliding the movable electrode 58 becomes unnecessary, so that the configuration is simplified and a cheaper device can be provided. Further, since there is no mechanism for the movable electrode 58 to slide over a long distance while being energized, there is no contamination from the sliding part or its gap or rain water intrusion. Furthermore, since the confirmation work of the ground contact state by the operator's eyes becomes easier, the safety of the inspection work and the replacement work is high, and the time required for the ground contact can be shortened.
[0044]
4). Fourth embodiment
(Constitution)
The fourth of the present invention The embodiment will be described with reference to FIGS. 5 is a schematic cross-sectional view showing the entire composite gas insulated switchgear according to the present embodiment, FIG. 6 is an enlarged cross-sectional view showing details of a portion B shown in FIG. 5, and FIG. 7 is shown in FIG. It is an expanded sectional view showing the detail of C section. That is, in the present embodiment, as shown in FIGS. 5 and 6, the insulating containers 37 and 38 of the disconnectors 39 and 40 are connected to the metal container 49 via the partition walls 54 and 55 that form gas compartments. Has been. These partition walls 54 and 55 are respectively Polytetrafluoroethylene One end of insulating pipes 63a and 63b formed of an insulating material such as wood or nylon is connected, and the gas spaces in the insulating containers 37 and 38 are connected to the gas spaces in the respective insulating pipes 63a and 63b. Yes.
[0045]
As shown in FIGS. 5 and 7, the insulating pipes 63 a and 63 b pass through the inside of the insulating container 50 that supports the metal container 49, and the other end is led into the mechanism box 41 that holds the insulating container 50. . A gas density monitoring device 64a is connected to ends of the insulating pipes 63a and 63b led into the mechanism box 41 via gas valves 65a and 65b and a gas pipe 66a. On the other hand, a partition that forms a gas compartment is not installed between the insulating container 42 of the circuit breaker 43, the metal container 49, and the insulating container 50, and no gas compartment is formed therebetween. A gas density monitoring device 64b is connected to the inside of the insulating container 50 via a gas valve 65c and a gas pipe 66b. Other configurations are the same as those in the first embodiment.
[0046]
(Function and effect)
In the present embodiment as described above, since the insulating pipes 63a and 63b are made of an insulating material, the partition walls 54 and 55 that form gas compartments that are normally at high potentials in the mechanism box 41 that is at ground potential. A space filled with an insulating gas can be laid without problems up to the space. As a result, the gas pressure in the insulating pipes 63a and 63b can be monitored using the gas density monitoring device 64a at a place where the ground potential is present. Further, when performing gas processing on the disconnectors 39 and 40, gas processing work can be performed at a low position on the ground potential side by using the gas valves 65a, 65b and 65d. On the other hand, the gas space of the continuous gas space of the insulating container 42, the metal container 49, and the insulating container 50 of the circuit breaker 43 can be monitored by the gas density monitoring device 64b at the same position as described above, and using the gas valve 65c, Gas processing work is possible. Therefore, the gas pressure can be monitored by monitoring the gas pressure in each gas section under the ground potential, so that safety and reliability are high, and the operation cost can be reduced.
[0047]
The present invention is not limited to the above embodiment. For example, the type and number of switchgears, the type of insulating gas used, the material and shape of each container, and the like can be changed as appropriate.
[0048]
【The invention's effect】
As described above, according to the present invention, not only can the cost required for replacement in the case of failure of one contact be minimized, but also the time required for replacement can be minimized, and an inexpensive composite gas can be used. An insulated switchgear can be provided.
Further, according to the present invention, it is possible to provide a composite gas insulated switchgear that can be applied to a power transmission system having a double bus configuration without impairing its original meaning.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a composite gas insulated switchgear according to a first embodiment of the present invention.
2 is a cross-sectional view of the movable electrode and energized sliding electrode storage case of the grounding device, showing details of part A shown in FIG.
FIG. 3 is a cross-sectional view of a composite gas insulated switchgear according to a second embodiment of the present invention.
FIG. 4 is a sectional view of a composite gas insulated switchgear according to a third embodiment of the present invention.
FIG. 5 is a sectional view of a composite gas insulated switchgear according to a fourth embodiment of the present invention.
6 is an enlarged cross-sectional view showing details of a portion B in FIG. 5;
7 is an enlarged cross-sectional view showing details of a portion C in FIG.
FIG. 8 is a front sectional view showing the vicinity of a disconnector contact and a grounding device contact of a conventional composite gas insulated switchgear.
[Explanation of symbols]
30 ... Composite gas insulated switchgear
31, 32, 57 ... fixed electrodes
33, 34, 58 ... movable electrode
35, 36 ... disconnector contact
37, 38, 42, 50 ... Insulating container
39, 40 ... disconnector
41 ... Mechanism box
43 ... circuit breaker
44, 45, 46 ... external terminals
47 ... Breaker contact
48 ... Drive mechanism
49 ... Metal container
54, 55 ... Bulkhead
56 ... Grounding device
58 ... fulcrum
59 ... Energized sliding electrode storage case
60a, 60b ... packing
61 ... Notch
62a-62c ... electrified sliding electrode
63a, 63b ... insulated pipes
64a, 64b ... Gas density monitoring device
65a-65d ... Gas valve
66a, 66b ... gas piping

Claims (9)

In a composite gas insulated switchgear that is provided with a plurality of switchgears that are provided with a contact made of electrodes that can be separated from each other in an insulating container filled with an insulating gas.
The plurality of opening / closing devices are connected to a conductive container made of a common conductive material,
The conductive container is supported by an insulating structure made of an insulator,
The insulating structure is supported by a conductive support structure,
The insulating structure is provided with a grounding device having a fixed electrode and a movable electrode that can be contacted and separated from each other.
A combined gas insulated switchgear characterized by the above.   The composite gas insulated switchgear according to claim 1, wherein at least one of the plurality of switchgears is a disconnector.   The composite gas insulated switchgear according to claim 1 or 2, wherein at least one of the plurality of switchgears is a circuit breaker. The fixed electrode of the grounding device is fixed to the conductive container,
The composite gas insulated switchgear according to any one of claims 1 to 3, wherein the movable electrode is slidable and energized with respect to the support structure.   5. The composite gas insulated switchgear according to claim 4, wherein the movable electrode is provided outside the insulating structure.   6. The composite gas insulated switchgear according to claim 4, wherein a part of the movable electrode is provided so as to be housed inside the support structure in an open state. The support structure is provided with a sliding portion that slidably holds the movable electrode,
Between the sliding portion and the movable electrode, a sealing member that keeps water tightness is provided,
The composite gas insulated switchgear according to any one of claims 4 to 6, wherein a discharge part for discharging water to the outside is provided at an upper part of the sliding part.   5. The composite gas insulated switchgear according to claim 4, wherein the movable electrode and the fixed electrode are provided inside the insulating structure. The grounding device has a fixed electrode and a movable electrode that can contact and separate from each other,
The fixed electrode is fixed to the conductive container,
The insulating structure is supported by a conductive support structure,
4. The composite gas insulated switchgear according to claim 1, wherein one end of the movable electrode is provided so as to be rotatable and energized with respect to the support structure. 5.

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