JP2006296062A - Gas-insulated switchgear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas-insulated switchgear facilitated in the arrangement of an operation apparatus by making compound a disconnector and the operation apparatus for a grounding switch, and shortening the length of a first common rotating shaft. <P>SOLUTION: The disconnectors 2, 3 and the grounding switches 4, 5 are opened and closed by one common four-switching position type operation apparatus 15, a disconnector 2a is opened and closed by the other exclusive operation apparatus, the four-switching position type operation apparatus 15 is attached with two gear 20, 21 in proximity with each other at the rotatably-supported common rotating shaft 16, a chain 22 is connected between the gear 20 and a gear connected to the disconnector 2 and the rotating shaft 25 of the grounding switch 4, and a chain 23 is connected between the gear 21 and a gear that is connected to the disconnector 3 and a rotating shaft 30 of the grounding switch 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a gas-insulated switchgear applied to a substation, switchgear, and the like.

  A gas-insulated switchgear is constructed by supporting each main circuit conductor such as a cut-off part, disconnecting part and grounding switch part in a sealed container filled with an insulating gas while being electrically insulated from the sealed container. The arrangement of a plurality of open / close sections that modularize or standardize the configuration in one sealed container can accommodate various forms of circuit configurations. However, the conventional gas insulated switchgear is provided with an operation device arranged outside the closed container for each open / close unit, even if the open / close unit configuration in the closed container is combined, and the open / close unit in the closed container is provided from this controller. The transmission of power to the robot was converted into a rotary motion using a lever after converting the rotary motion from the controller into a linear motion. On the other hand, the reliability of gas-insulated switchgear is directly linked to the reliability of electric power, so it is important to improve the reliability. The reliability can be ensured by a partial discharge test after assembly. In addition, it is fundamental to reduce the number of movable parts and parts for mechanical components, and for this reason, disconnectors and grounding switches have recently been combined.

For example, in a circuit configuration in which disconnectors are connected to both ends of the circuit breaker, and each of the disconnectors and the circuit breaker has a ground switch, two disconnectors and two ground switches are provided. A gas-insulated switchgear that is opened and closed by a single common controller is known (for example, see Patent Document 1).
JP 2003-189427 A

  However, in a conventional gas-insulated switchgear, a common common operating unit is provided with a first common rotating shaft, and the operating force is transmitted to the first common rotating shaft in the axial direction to the movers of the four switches. The four levers are respectively fixed, one end of each operating force transmission means such as a link or a lever is connected to each lever, and the other end of each operating force transmission means is connected to the mover of each opening / closing part. Since the two rotating shafts are connected, the number of rotating shafts increases, and the four common levers are fixed to the first common rotating shaft. As a result, the first common rotating shaft becomes longer and the mass increases. Was made larger. Further, since the operating device has the first common rotating shaft having such a large axial length, the arrangement location is limited by the configuration of the hermetic container of the gas insulated switchgear, and the combined operating device is not necessarily a gas. Not compatible with insulated switchgear.

  An object of the present invention is to provide a gas-insulated switchgear in which an operator for a disconnect switch and a ground switch is combined, and the axial length of the first common rotating shaft is shortened to facilitate the placement of the controller. It is in.

  In order to achieve the above-mentioned object, the present invention provides a circuit breaker, a circuit breaker connected in series to both ends of the circuit breaker, and a circuit breaker between the circuit breaker and the circuit breaker. A gas-insulated switchgear comprising a ground switch having one end connected and the other end grounded is provided with two common disconnecting switches and two common switches for the grounding switch. Rotating shaft that attaches two gears or pulleys in the axial direction of the common rotating shaft provided, and transmits the opening / closing operation force by connecting to each of the disconnecting switch and the grounding switch located on one side of the circuit breaker And a rotating shaft connected to each of the movers of the disconnector and the earthing switch located on the other side of the circuit breaker to transmit an opening / closing operation force, the two rotating shafts being connected to the two gears or Connected to pulley Characterized in that linked to rotate via respective En or belt.

  According to a second aspect of the present invention, there are provided a circuit breaker, a double bus bar connected to one side of the circuit breaker, one side of the circuit breaker and the double bus bar in a sealed container filled with an insulating gas. A bus-side disconnector connected in between, a line-side disconnector connected to the other side of the circuit breaker, and a ground switch having one end connected to both sides of the circuit breaker and the other end grounded. In the gas insulated switchgear constructed, a rotary shaft connected to each of the disconnectors located on the bus bar side of the circuit breaker and each mover of the ground switch to transmit an opening / closing operation force; A common operating device that is connected to each of the disconnectors located on the line side and each movable element of the grounding switch to transmit an opening / closing operation force, and is connected to rotate both of these rotation shafts, Located on the busbar side of the circuit breaker Characterized by providing the other dedicated operating device for opening and closing the other one of said disconnectors.

  According to a third aspect of the present invention, in the second aspect of the present invention, the common operating device includes a common rotating shaft having two gears or pulleys attached in an axial direction thereof, and the two rotating shafts being connected to the two rotating shafts. And a chain or belt connected to a gear or pulley.

  According to a fourth aspect of the present invention, in the second aspect of the present invention, the common operating device is configured as a four open / close position type operating device that drives the rotary shafts to four switching positions. The disconnector and the earthing switch are opened and closed.

  According to a fifth aspect of the present invention, there is provided the interpole structure according to the third aspect, wherein the mover and the stator constituting the line-side disconnector are in contact with each other at two switching positions. It is characterized by that.

  Since the gas-insulated switchgear according to the present invention is a common rotating shaft having only two gears or pulleys, the shaft length of the common rotating shaft is extremely short, and the two gears or pulleys can be arranged close to each other. Therefore, the axial direction of the common rotating shaft can be reduced in size, and the common operating device can be arranged at various positions of the airtight container for the circuit breaker, and only the length of the chain or belt is changed accordingly. Therefore, the degree of freedom of design can be expanded.

  The gas insulated switchgear according to the second aspect of the present invention has a common disconnection switch on one side of the busbar, a disconnector on the line side, and both installed switches arranged on both sides of the circuit breaker in the double bus system. Since it is opened and closed with an operating device, it can be a common operating device that opens and closes 4 switches with a simple configuration with 4 open / closed positions, and many parts are standardized in other circuit configurations. can do.

  In the gas insulated switchgear according to the third aspect of the present invention, four common switches are selected in a double bus system circuit configuration, and the switch is operated by the common controller. The number of open / close positions can be simple, and since the common rotation shaft has only two gears or pulleys, the shaft length of the common rotation shaft is extremely short, and the two gears or pulleys are Since they can be arranged close to each other, the axial direction of the common rotating shaft can be reduced in size, and the common operating unit can be arranged at various positions of the airtight container for the circuit breaker. Or, it is only necessary to change the length of the belt, so that the degree of freedom in design can be expanded.

  Since the gas-insulated switchgear according to the present invention described in claim 4 is a four open / close position type actuator that is driven to four switching positions, the number of open / close positions can be reduced, and the configuration can be simplified. In addition to being able to be a common controller that opens and closes four switches with a simple configuration, it can be standardized and used in other circuit configurations other than the double bus system.

  The gas insulated switchgear according to the present invention as set forth in claim 4 has a configuration in which the movable element and the stator of the line-side disconnector are brought into contact with each other at two opening / closing positions, so that the disconnector is in a closed state with a simple configuration. While being held, the double bus can be selected as either one by alternately opening or closing the disconnector on the bus side.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
7 to 10 show single line connection diagrams showing a typical circuit configuration known as a substation configuration by a gas insulated switchgear. FIG. 7 shows a single bus system, FIG. 8 shows a double bus system, and FIG. Is a circuit configuration known as a ring bus system, and FIG. 10 is a circuit configuration known as a 3/2 circuit breaker system.
In the single bus system shown in FIG. 7, a plurality of line lines and transformer lines are connected to the bus line 7. Of these, the line circuit includes a circuit breaker 1, a circuit breaker 2 electrically connected in series to the bus 7 side of the circuit breaker 1, a circuit breaker 3 connected to the line side of the circuit breaker 1, and a circuit breaker 1 It has a grounding switch 4 with one end connected between the disconnecting switch 2 and the other end grounded, and a grounding switch 5 with one end connected between the circuit breaker 1 and the disconnecting switch 3 and the other end grounded. On the other hand, the transformer circuit has one end connected between the circuit breaker 1, the circuit breaker 2 electrically connected in series to the bus 7 side of the circuit breaker 1, and the other end grounded. It has a ground switch 4, a transformer 8 connected to the opposite bus side of the circuit breaker 1, and a ground switch 5 having one end connected between the circuit breaker 1 and the transformer 8 and the other end grounded. Therefore, the transformer line has a circuit configuration similar to that of the line line, but normally has a circuit configuration in which the line side disconnector 3 in the line line is omitted.

  In the double bus system shown in FIG. 8, a plurality of line lines and transformer lines are connected to the double bus lines 7a and 7b, respectively. The line circuit includes a circuit breaker 1, a disconnecting device 2 electrically connected in series between the circuit breaker 1 and the bus 7a, a disconnecting device 2a electrically connected in series between the circuit breaker 1 and the bus 7b, and a circuit breaker. 1 is connected between the circuit breaker 1, the circuit breaker 1 is connected between the circuit breakers 2 and 2 a and the other end is grounded, and the other end is connected between the circuit breaker 1 and the circuit breaker 3. And a ground switch 5 having the other end grounded. On the other hand, the transformer circuit includes a circuit breaker 1, a disconnector 2 electrically connected in series between the circuit breaker 1 and the bus 7a, and a disconnector 2a electrically connected in series between the circuit breaker 1 and the bus 7b. The earthing switch 4 with one end connected between the circuit breaker 1 and the disconnecting switches 2 and 2 a and the other end grounded, the transformer 8 connected to the opposite bus side of the circuit breaker 1, and between the circuit breaker 1 and the transformer 8 And a ground switch 5 having one end connected to the other end and the other end grounded. The configuration of this transformer line is a circuit configuration in which the line side disconnector 3 in the line line is omitted.

  In the annular bus system shown in FIG. 9, a plurality of lines having the same configuration are connected in a ring, and the lines are connected to a line or a transformer 8 to exchange power. Each line includes a circuit breaker 1, a disconnector 2 electrically connected in series to one end of the circuit breaker 1, a disconnector 3 electrically connected in series to the other end of the circuit breaker 1, and a circuit breaker 1. And a grounding switch 4 having one end connected between the disconnecting switch 2 and the other end grounded, and a grounding switch 5 having one end connected between the circuit breaker 1 and the disconnecting switch 3 and the other end grounded. ing.

  In the 3/2 circuit breaker system shown in FIG. 10, three lines having the same configuration are connected in series between the double buses 7a and 7b, and each line is connected to the line or the transformer 8 to transfer power. Like to do. Each line includes a circuit breaker 1, a disconnector 2 electrically connected in series to one end of the circuit breaker 1, a disconnector 3 electrically connected in series to the other end of the circuit breaker 1, and a circuit breaker 1. And a grounding switch 4 having one end connected between the disconnecting switch 2 and the other end grounded, and a grounding switch 5 having one end connected between the circuit breaker 1 and the disconnecting switch 3 and the other end grounded. ing.

  In general, in a substation or the like, a gas-insulated switchgear is configured by any of the circuit configurations described above. However, as described above, it is desirable to promote standardization and combination to configure a gas-insulated switchgear. For example, the double bus system shown in FIG. 8 will be described. As the circuit breaker 1, a puffer type circuit breaker is normally used. Since it is necessary, various methods can be considered when combining the other switches 2, 2a, 3, 4, 5 except the circuit breaker 1. It is conceivable to operate one adjacent disconnect switch and one earthing switch with one common controller, as usual, but in this case, a total of three controllers are required. End up. Therefore, in order to reduce the number of operating devices, the first plan to combine the disconnectors 2, 2a, 3 and the earthing switches 4, 5 with one common operating device, the bus side and the line The second disconnector 2 and the ground-side switch 4 are used as a common controller, and the line-side disconnector 3 and the ground switch 5 are used as another common controller. In addition, a third plan in which the disconnecting devices 2 and 3 and the grounding switches 4 and 5 are used as a common operating device, and a dedicated operating device for the disconnecting device 2a is added. Here, the first plan is a single controller, whereas the second and third plans are each two controllers.

  On the other hand, when configuring a gas-insulated switchgear according to one of the circuit configurations described above, when designing and manufacturing a unique gas-insulated switchgear for each circuit configuration, the common part is a standard configuration regardless of the circuit configuration. It is conceivable that a gas insulated switchgear is designed and manufactured using this standard configuration. In the latter case, a basic circuit configuration surrounded by a dotted line in each of FIGS. 7 to 10, that is, a circuit breaker 1, a disconnector 2 electrically connected in series to one end of the circuit breaker 1, Disconnector 3 electrically connected in series to the other end, ground switch 4 with one end connected between breaker 1 and disconnector 2 and grounded at the other end, and one end between breaker 1 and disconnector 3 The portion having the ground switch 5 connected and grounded at the other end has the same configuration, and it is desirable that the basic circuit configuration surrounded by the dotted line is a standard configuration.

  Considering the gas-insulated switchgear of each circuit configuration from such combination and standardization, the above-mentioned first proposal can reduce the number of operating devices, but the standardization in each circuit configuration shown in FIGS. It will be. On the other hand, the second plan and the third plan can make the number of operating devices of each switch 2-5 the same two while maintaining the standardization in each circuit configuration shown in FIGS.

FIG. 11 is an explanatory diagram for comparing the number of open / close positions in the above-described second and third proposals.
In the double bus system shown in FIG. 8, it is necessary to select a configuration in which energization to the line can be selected using only one of the buses from the energized state using both buses 7a and 7b. Considering this point, in the case of the third plan, the number of opening / closing positions required is four as shown in FIG. 11, whereas in the case of the second plan, the number of opening / closing positions required is five. Become. Therefore, the third plan can be simplified by reducing the number of open / close positions by one compared to the combination of the second plan, and can be used in other circuit configurations by standardization. it can.

  In this way, it is desirable to configure the gas insulated switchgear according to the third proposal in which the four switches, the disconnecting switches 2 and 3 and the grounding switches 4 and 5 are shared. In this case, the minimum number of opening / closing positions required for the common controller is four in the double bus system as shown in FIG. 12, but three in the circuit configuration other than the double bus system. It is. Therefore, a gas-insulated switchgear is constructed by the above-mentioned combination and standardization, and the three open / close position type actuators and the four open / close position type actuators can be exchanged as the actuators of the respective switches 2 to 5, and the double bus system For the voltage class with a large percentage, the 4 open / close position type actuator is used as standard, and for the voltage class with a small percentage of the double bus system, the 3 open / close position type actuator is used as standard.

Next, a gas insulated switchgear that employs a four open / close position type operation device will be described.
FIG. 1 is a side view showing a gas insulated switchgear according to an embodiment of the present invention, and has the double bus system circuit configuration shown in FIG. A busbar sealed container 11 storing the busbar 7 and a busbar sealed container 11a storing the busbar 7a are arranged on the upper part of the circuit breaker sealed container 10 of the circuit breaker 1 arranged almost horizontally. A first switchgear sealed container 12 is connected between one end of the circuit breaker sealed container 10 and the busbar sealed container 11, and a first switchgear sealed container 10 is connected between the one end of the circuit breaker sealed container 10 and the busbar sealed container 11a. The second closed container 12a for the switch is connected. The second switch enclosure 12 is composed of a combined disconnect switch 2 and ground switch 4 as will be described in detail later. The second switch enclosure 12a includes a disconnect switch. 2a is configured.

  The other end of the circuit breaker sealed container 10 is connected to a cable head sealed container 14 containing a cable head 9 connected to the line side via a third switch sealed container 13, and is connected to the third switchgear. In the airtight container 13, a disconnect switch 3 and a grounding switch 5 are combined as will be described in detail later. The disconnecting switches 2 and 3 and the grounding switches 4 and 5 are configured as a four opening / closing position type opening / closing unit that is opened and closed by a common four opening / closing position type operating unit 15, and the disconnecting switch 2 a is another dedicated operation unit. It is configured to be opened and closed by. Since the dedicated operation device of the latter disconnector 2a has a normal configuration, detailed description thereof is omitted here.

  Here, the four open / close position type operating device 15 is configured such that the storage container is supported on the outer wall of the circuit breaker hermetic container 10 or a frame in the vicinity thereof. As shown in FIG. 2, both ends of a common rotating shaft 16 having a gear 19 engaged with a gear 18 attached to the rotating shaft of the motor 17 are rotatably supported in the storage container. The two gears 20, 21 are attached in close proximity. The gear 20 and the gear connected to the rotary shaft 25 of the disconnector 2 and the earthing switch 4 shown in FIG. 1 are connected by a chain 22, and the gear 21 and the disconnector 3 and the earthing switch shown in FIG. 1 are connected. The gears connected to the rotary shaft 30 of the vessel 5 are connected by a chain 23. An insulator is provided in the middle of the rotary shafts 25 and 30 connected by these chains 22 and 23, and the electrical circuit between the main circuit conductors constituting each switch enclosure 12 and 13 and each switch inside the switch is electrically connected. The opening / closing operation force is transmitted in an insulated state. Thus, the opening / closing operation force from the 4 opening / closing position type operating device 15 is applied to the disconnecting switch 2 and the grounding switch 4 combined via the chain 22 for increasing the transmission efficiency, and also via the chain 23. Thus, the signals are transmitted to the combined disconnect switch 3 and ground switch 5 respectively.

  The above-described four opening / closing position type operating device 15 is for opening and closing a four opening / closing position type opening / closing unit that is a combination of four switches 2 to 5, but is common only to have two gears 20, 21. Since the rotary shaft 16 is used, the shaft length of the common rotary shaft 16 is extremely short, and the two gears 20 and 21 can be arranged close to each other, so that the axial direction of the common rotary shaft 16 can be reduced. For this reason, even if the storage container is supported on or near the outer wall portion of the circuit breaker hermetic container 10, the four open / close position type operating device 15 can be arranged at various positions, and the chains 22, 23 are arranged accordingly. Since it is only necessary to change the length, the degree of freedom in design can be expanded.

  In the above-described four opening / closing position type operating device 15, the two gears 20, 21 are provided on the common rotating shaft 16, but a pulley may be used instead of the gears 20, 21, and a belt may be used instead of the chains 22, 23. Almost the same effect can be obtained. Further, the four open / close position type actuator 15 can be configured as a phase separation type or a three-phase collective type. In any case, since the shaft length of the common rotary shaft 16 is short, it can be installed at various positions.

FIG. 3 shows a four-opening / closing position type switching unit structure in which the disconnecting switch 2 and the grounding switch 4 are combined, and a four-opening / closing position type switching unit structure in which the disconnecting switch 3 and the grounding switch 5 are combined. FIG.
The conductor 24 connected to one end of the circuit breaker 1 is connected to a movable element 26 that can rotate around the rotary shaft 25 while maintaining an electrical connection. A gear is attached to a portion of the rotary shaft 25 that is insulated and led out of the first switch enclosure 12 shown in FIG. 1 while being kept airtight, and a chain 22 is connected to the gear. Here, the movable element 26 has an opening / closing position of about 60 degrees in the clockwise direction by the four opening / closing position type actuator 15 and is rotated 180 degrees, and a first opening / closing position at which the movable element 26 can come into contact with the free end side. A fixed ground contact 27 which is normally grounded is disposed, and a stator 28 connected to the bus bar 7 is disposed at a fourth opening / closing position which can be contacted to the free end side. Further, there are a second opening / closing position and a third opening / closing position which are substantially equidistant between the first opening / closing position and the fourth opening / closing position. The fixed ground contact 27 and the stator 28 are arranged so as to have contact portions with the mover 26 on a straight line passing through the rotation shaft 25, that is, at positions separated by about 180 degrees. The mover 26 and the fixed ground contact 27 constitute the ground switch 4, and the mover 26 and the stator 28 constitute the disconnector 2.

  The conductor 29 connected to the other end of the circuit breaker 1 is connected to two movable elements 31a and 31b that can rotate around the rotary shaft 30 while maintaining an electrical connection. A gear is attached to a portion of the rotary shaft 30 that is insulated and led out of the second switch enclosure 13 shown in FIG. 1 while being kept airtight, and a chain 23 is connected to the gear. The movers 31a and 31b have an opening angle of about 60 degrees in the rotation direction, and are rotated by the four opening / closing position type operation device 15 and the chain 23 with four opening / closing positions in the clockwise direction at about 60 degrees. It has a configuration.

  Accordingly, the fixed ground contact 32 that is normally grounded so as to have the contact portion with the movable element 31a on a straight line passing through the rotary shaft 30, that is, about 180 degrees apart from each other, and the stator connected to the cable head 9 33, the movable element 31a contacts the fixed ground contact 32 at the first opening / closing position on the free end side of the movable elements 31a, 31b, and the movable element 31b at the third opening / closing position. Contacts the stator 33, and the movable element 31a contacts the stator 33 at the fourth opening / closing position, and the movable element 31a at the second opening / closing position does not contact any stator. . The mover 31a and the fixed ground contact 32 constitute the ground switch 5, and the movers 31a and 31b and the stator 33 constitute the disconnector 3.

Next, the operation of the four opening / closing position type opening / closing unit by the above-described four opening / closing position type operating device 15 will be described.
In the state shown in FIG. 3, the free end side of the mover 26 is in contact with the fixed ground contact 27, the ground switch 4 is grounded, and the disconnect switch 2 is open. Further, the free end of the movable element 31a is in contact with the fixed ground contact 32, the ground switch 5 is grounded, and the disconnect switch 3 is opened. Accordingly, in the first opening / closing position of the four opening / closing position type actuator 15, the position No. shown in FIG. 1 is turned on and off.

  From this state, when the chains 22 and 23 are driven by the four opening / closing position type operating device 15 and the rotary shafts 25 and 30 are respectively rotated about 60 degrees clockwise, the second opening / closing position is reached, as shown in FIG. On the other hand, the mover 26 is disconnected from the fixed ground contact 27 and the ground switch 4 is opened. However, the mover 26 is still disconnected from the stator 28, and the disconnector 2 is kept open. Further, the mover 31a is disconnected from the fixed ground contact 32 and the ground switch 5 is also opened. However, both the movers 31a and 31b are still disconnected from the stator 33, and the disconnector 3 is kept open. is doing. Therefore, in the second opening / closing position of the four opening / closing position type operating device 15, the position No. shown in FIG. 2 is turned on and off.

  When the chains 22 and 23 are driven by the four open / close position type operating device 15 from the state shown in FIG. 4 and the rotary shafts 25 and 30 are further rotated about 60 degrees clockwise, the third open / close position is obtained, as shown in FIG. Thus, the movable element 26 is still disconnected from the fixed ground contact 27 and the stator 28, and the ground switch 4 and the disconnecting switch 2 are kept open. On the other hand, the movers 31a and 31b keep the state disconnected from the fixed ground contact 32 and open the ground switch 5, but the mover 31b contacts the stator 33 and the disconnector 3 is closed. It becomes. Accordingly, in the third opening / closing position of the four opening / closing position type actuator 15, the position No. shown in FIG. 3 is turned on / off.

  When the chains 22 and 23 are driven by the four opening / closing position type operating device 15 from the state of FIG. 5 and the rotary shafts 25 and 30 are further rotated about 60 degrees in the clockwise direction, the fourth opening / closing position is obtained, as shown in FIG. The mover 26 contacts the stator 28 while maintaining a non-contact state with the fixed ground contact 27, and the ground switch 4 is opened and the disconnect switch 2 is closed. On the other hand, the movers 31a and 31b keep the state disconnected from the fixed ground contact 32 and open the ground switch 5, but the mover 31a contacts the stator 33 and the disconnector 3 is closed. It becomes. Therefore, in the fourth opening / closing position of the four opening / closing position type operating device 15, the position No. shown in FIG. 4 is turned on / off.

  In the four opening / closing position type operating device 15 described above, at the third opening / closing position shown in FIG. 5, the movable element 26 is not in contact with the fixed ground contact 27 and the stator 28, and the line side disconnector 3 is the third opening / closing position and the fourth opening / closing position, and since the two blade-shaped movers 31a and 31b are in contact with the stator 33, the disconnector 2a shown in FIG. It is possible to close the disconnector 2a with the dedicated operator, and to open the disconnector 2a with the dedicated operator of the disconnector 2a at the fourth opening / closing position shown in FIG. In order to realize this, if an interlock configuration is constructed between the dedicated operating device of the disconnector 2a and the 4 open / close position type operating device 15, the circuit breaker 1 is removed from the gas insulated switchgear shown in FIG. Other switches can be opened and closed with two controllers.

  By opening / closing the above-described four opening / closing position type opening / closing part structure with the four opening / closing position type operating unit 15, it becomes possible to drive the four switches 2 to 5 with one unit, and various circuit types. Since the gas insulated switchgear can be combined while standardizing, the reliability can be improved. For example, when the failure rates X of the four open / close position type actuators 15 are the same, the failure probability P4 when each of the four switches is configured with a dedicated controller, and one four open / close position type The failure probability P1 when the operating device 15 is used can be expressed as follows.

[Equation 1]
P4 = (1-X) ⁴
P1 = (1-X)
Assuming that the failure rate X is 1%, P4 is 0.96, P1 is 0.99, P4 <P1, and four switches are operated by a single four-open / close position type controller 15. In the case of doing so, the reliability can be improved. In addition, since the movers 18, 23a, and 23b serve as the movers of the disconnecting switches 2 and 3 and the ground switches 4 and 5, electrical and mechanical interlocks are unnecessary.

  In the above-described four opening / closing position type opening / closing section, the line-side disconnector 3 is constituted by a blade-type disconnector having two blade movers 31a and 31b, and the third disconnector shown in FIGS. And the fourth open / close position, respectively, so that the closed state is maintained, so that the disconnector 3 on the bus line side 2 is maintained while the disconnector 3 is maintaining the closed state as required in the double bus system. 2a can be alternately opened or closed, and the buses 7 and 7a can be selected as either one. Therefore, circuit configurations other than the double busbar can be dealt with by removing the disconnector 2a shown in FIG. 1 and its dedicated operation device, and standardization can be achieved. However, in a circuit configuration other than the double bus system, a three open / close position type external controller as shown in FIG.

  For example, when the above-described four opening / closing position type opening / closing part has the same inter-electrode structure, the three opening / closing position type external controller has a total of three opening / closing positions by setting each switching position switching angle to about 90 degrees. Can be realized. Here, each switching position switching angle is for the case where the fixed ground contact 27 and the stator 28 are arranged on a straight line passing through the rotating shaft 25 of the mover 26. If the positional relationship changes, each open / close position switching angle also changes accordingly.

  Even if the circuit configuration is changed in this way, it is only necessary to replace the 4 opening / closing position type operating device 15 and the 3 opening / closing position type external operating device, so there is no need to change any other configuration including the opening / closing portion. Standardization can be achieved. In addition, since the chains 22 and 23 having high transmission efficiency are used for power transmission from the external operating device 15, it is possible to suppress an increase in operating force of the 4 open / close position type operating device 15.

13 and 14 are cross-sectional views showing a four-open / close position-type opening / closing part of a gas insulated switchgear according to another embodiment of the present invention.
In the previous embodiment, the movers 31a and 31b are configured as two blades as the line-side disconnector 3, and the stator 33 and the third open / close position of the movers 31a and 31b are connected to the fourth open / close position. However, in the embodiment shown in FIG. 13, the movable element 31 has a simple configuration similar to that of the movable element 26, while the disconnector 3 is maintained in the closed state. The stator 33 constituting the container 3 has a length corresponding to approximately one opening / closing position in the rotation direction of the movable element 31 so as to maintain the contact state of the movable element 31 from the third opening / closing position to the fourth opening / closing position. It has the structure which has the diagonal contact part 33a which has.

  As in the case of the previous embodiment, such a four-opening / closing position type opening / closing part is configured such that when the movable member 31 is driven to the third opening / closing position by the four-opening / closing position type operating device 15, as shown in FIG. The line-side disconnector 3 can be closed by bringing 31 into contact with the stator 33. Further, when the movable element 31 is driven to the fourth opening / closing position by the four opening / closing position type operating device 15, the movable element 31 rotates while maintaining the contact state with the oblique contact portion 33a of the stator 33, The line-side disconnector 3 can maintain a closed state. On the other hand, since the mover 26 maintains a state where it does not contact the fixed ground contact 27 and the stator 28 at the third opening / closing position shown in FIG. 14, the exclusive operation of the disconnector 2a shown in FIG. The disconnector 2a can be closed by driving the device. As can be seen from this description, the four opening / closing position type opening / closing section according to the present embodiment also operates in the same manner as in the previous embodiment.

  According to such a 4 opening / closing position type opening / closing section, the mover 31 of the line-side disconnector 3 and the mover 26 of the bus-side disconnector 2 can be configured in the same way, so that parts can be shared. In addition, it is possible to reduce the operating force of the four opening / closing position type operating device 15 by reducing the weight of the movable part.

  The four-open / close position type opening / closing part of the gas insulated switchgear according to still another embodiment of the present invention may be an intermediate structure between the structure shown in FIG. 3 and the structure shown in FIG. That is, the oblique contact portion 33a of the stator 33 shown in FIG. 13 has a length of 2/1 in the rotation direction of the mover 31, while the movers 31a and 31b shown in FIG. Even if the thickness is 2/1, substantially the same effect can be expected. Further, even if the movable elements 31a and 31b shown in FIG. 3 are integrated into a fan-shaped movable element or a belt is used instead of the chains 22 and 23, substantially the same effect can be expected.

15 to 18 are cross-sectional views showing a four-open / close position type opening / closing part of a gas insulated switchgear according to still another embodiment of the present invention.
In this embodiment, the fixed ground contact 27, the cylindrical portion 24a of the conductor 24, and the stator 28 are arranged on a substantially horizontal line with a predetermined insulation distance therebetween, and can be moved into the cylindrical portion 24a. The arranged movable element 26 is prevented from coming into contact with the stator 28 in the contact state with the fixed ground contact 27 at the left end, and is in contact with the fixed ground contact 27 in the contact state with the stator 28 at the right end. The movable element 26 and the rotary shaft 25 are connected by a rack and pinion gear. Similarly, the fixed ground contact 32, the cylindrical portion 29a of the conductor 29, and the stator 33 are arranged on a substantially horizontal line with a predetermined insulation distance therebetween, and are movably arranged in the cylindrical portion 29a. The mover 31 is prevented from contacting the stator 33 in the contact state with the fixed ground contact 32 at the left end, and is not contacted with the fixed ground contact 32 in the contact state with the stator 33 at the right end. The movable element 31 and the rotary shaft 30 are connected by a rack and pinion gear.

  As in the case of FIG. 3, the circuit breaker 1 is connected between the conductor 24 and the conductor 29, and although not shown in detail, the fixed ground contacts 27 and 32, the cylindrical portions 24a and 29a, and the stator 28 are omitted. , 33 in contact with each other at the respective positions, the multi-contact is used to reduce the contact resistance and enable a large current flow. If the conversion ratio of each rack and pinion gear and the axial length and stroke of the movers 26 and 31 are the same, the axial length of the cylindrical portion 29a of the conductor 29 is shorter than that of the cylindrical portion 24a. The child 31 is greatly moved toward the stator 33 side.

  In the state shown in FIG. 15, the left end side of the mover 26 is in contact with the fixed ground contact 27, the ground switch 4 is grounded, and the disconnect switch 2 is open. Further, the left end side of the mover 31 is in contact with the fixed ground contact 32, the ground switch 5 is grounded, and the disconnect switch 3 is opened. Accordingly, in the first opening / closing position of the four opening / closing position type actuator 15, the position No. shown in FIG. 1 is turned on and off.

  From this state, when the chains 22 and 23 are driven by the four opening / closing position type operating device 15 and the rotary shafts 25 and 30 are respectively rotated clockwise, the movable element 26 is moved to the right by a predetermined distance via the rack and pinion gear. That is, it is driven by 1/3 of the entire stroke. When the second opening / closing position shown in FIG. 16 is reached, the mover 26 is disconnected from the fixed ground contact 27 and the ground switch 4 is opened, but is still disconnected from the stator 28 and the disconnect switch 2. Holds an open circuit. Further, the mover 31 driven by 1/3 of the full stroke via another rack and pinion gear is disconnected from the fixed ground contact 32 and the ground switch 5 is also opened, but the mover 31 is the stator. It is still disconnected from 33 and the disconnector 3 keeps the open state. Therefore, in the second opening / closing position of the four opening / closing position type operating device 15, the position No. shown in FIG. 2 is turned on and off.

  When the chains 22 and 23 are driven by the four opening / closing position type operating device 15 from the state shown in FIG. 16 and the rotating shafts 25 and 30 are further rotated clockwise, the movable element 26 is driven rightward via the rack and pinion gears. Thus, the position reaches 2/3 of the entire stroke shown in FIG. In the third opening / closing position shown in FIG. 17, the movable element 26 is still disconnected from the fixed ground contact 27 and the stator 28, and the ground switch 4 and the disconnecting switch 2 maintain the open state. On the other hand, the movable element 31 driven to the position of 2/3 of the full stroke via another rack and pinion gear keeps the state disconnected from the fixed ground contact 32 and opens the ground switch 5. However, the movable element 31 comes into contact with the stator 33 and the disconnector 3 is closed. Accordingly, in the third opening / closing position of the four opening / closing position type actuator 15, the position No. shown in FIG. 3 is turned on / off.

  When the chains 22 and 23 are driven by the four opening / closing position type operating device 15 from the state of FIG. 17 and the rotating shafts 25 and 30 are further rotated clockwise, the mover 26 is driven to the right via the rack and pinion gears. The position of the full stroke shown in FIG. 18 is reached. In the fourth opening / closing position shown in FIG. 18, the mover 26 contacts the stator 28 while maintaining a non-contact state with the fixed ground contact 27, and the disconnect switch 2 remains in the open state with the ground switch 4 open. Is closed. On the other hand, the movable element 31 driven to the position of the full stroke via another rack and pinion gear keeps the state disconnected from the fixed ground contact 32 and opens the ground switch 5. Comes into contact with the stator 33 and the disconnector 3 is closed. Therefore, in the fourth opening / closing position of the four opening / closing position type operating device 15, the position No. shown in FIG. 4 is turned on / off.

  In the above-described four opening / closing position type opening / closing section, the movable element 26 is not in contact with the fixed ground contact 27 and the stator 28 at the third opening / closing position shown in FIG. Since the movable element 31 is in contact with the stator 33 at the third opening / closing position and the fourth opening / closing position, the disconnecting switch 2a is connected to the disconnecting switch 2a by the dedicated operating unit of the disconnecting switch 2a shown in FIG. Further, the disconnector 2a can be opened with the dedicated operating device of the disconnector 2a at the fourth opening / closing position shown in FIG. Accordingly, if an interlock structure is constructed between the dedicated controller of the disconnector 2a and the four-open / close position type controller 15, other switches other than the circuit breaker 1 in the gas insulated switchgear shown in FIG. The instrument can be opened and closed with two controllers. As can be seen from this description, the four opening / closing position type opening / closing section according to the present embodiment performs the same opening / closing operation as that of the previous embodiment. Moreover, such a linear operation type disconnector is easier to increase the contact range than the previous blade type disconnector, and is suitable for handling a large current.

  In each of the embodiments described above, the gas insulated switchgear of each circuit configuration is configured in consideration of standardization and combination, but a gas insulated switchgear having a specific configuration in each circuit configuration may be used. Even in that case, in the double bus system shown in FIG. 8, the bus-side disconnectors 2 and 2a are not combined, but the bus-side disconnector and the line-side disconnector By combining the grounding switch, it can be realized using the four-opening / closing position type operating device 15 having a simple configuration.

  The gas insulated switchgear according to the present invention can also be applied to gas insulated switchgear other than the configuration shown in FIG.

It is a side view which shows the gas insulated switchgear by one embodiment of this invention. It is a principal part perspective view of the 4 open / close position type operating device in the gas insulated switchgear shown in FIG. It is sectional drawing of the 4 open / close position type opening / closing part in the gas insulated switchgear shown in FIG. It is sectional drawing which shows the 2nd opening / closing position of the 4 opening / closing position type opening / closing part shown in FIG. It is sectional drawing which shows the 3rd opening / closing position of the 4 opening / closing position type switch shown in FIG. It is sectional drawing which shows the 4th opening / closing position of the 4 opening / closing position type switch shown in FIG. FIG. 2 is a single line diagram of a single bus system shown as a circuit configuration of the gas insulated switchgear shown in FIG. 1. FIG. 2 is a single-line diagram of a double bus system shown as a circuit configuration of the gas insulated switchgear shown in FIG. 1. FIG. 2 is a single-line diagram of an annular bus system shown as a circuit configuration of the gas insulated switchgear shown in FIG. 1. FIG. 2 is a 3/2 circuit breaker type single line connection diagram showing the circuit configuration of the gas insulated switchgear shown in FIG. 1. It is explanatory drawing which shows the number of positions of each switch in the gas insulated switchgear of the double bus system shown in FIG. It is explanatory drawing which shows the number of positions of each switch in the gas insulated switchgear of each circuit structure. It is sectional drawing of the 4 open / close position type opening / closing part of the gas insulated switchgear by other embodiment of this invention. It is sectional drawing which shows the 3rd opening / closing position of the 4 opening / closing position type opening / closing part shown in FIG. It is sectional drawing of the 4 open / close position type opening / closing part of the gas insulated switchgear by further another embodiment of this invention. It is sectional drawing which shows the 2nd opening / closing position of the 4 opening / closing position type | mold opening / closing part shown in FIG. It is sectional drawing which shows the 3rd opening / closing position of the 4 opening / closing position type switch shown in FIG. It is sectional drawing which shows the 4th open / close position of the 4 open / close position type switch shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Circuit breaker 2,2a, 3 Disconnector 4,5 Grounding switch 7,7a Bus 8 Transformer 15 4Opening / closing position type controller 16 Common rotating shaft 20,21 Gear 22,23 Chain 25,30 Rotary shaft 26,31 Mover 27, 32 Fixed ground contact 28, 33 Stator

n

Claims (5)

  In an airtight container filled with insulating gas, a circuit breaker, a disconnector connected in series to both ends of the circuit breaker, one end connected between the circuit breaker and the disconnector, and the other end grounded In a gas insulated switchgear constituting a ground switch, two common disconnecting switches and two common switches for the ground switch are provided, and two gears are provided in the axial direction of a common rotary shaft provided in the common switch. Or a pulley is attached, a rotary shaft that is connected to each of the movers of the disconnector and the earthing switch located on one side of the circuit breaker and transmits an opening / closing operation force, and the position located on the other side of the circuit breaker A rotary shaft that transmits the opening / closing operation force is provided by connecting to each switch of the disconnector and the earthing switch, and both the rotary shafts are connected to the two gears or pulleys via a chain or a belt, respectively. Gas insulated switchgear, characterized in that linked to rolling.   In an airtight container filled with insulating gas, a circuit breaker, a double bus connected to one side of the circuit breaker, and a bus-side disconnector connected between one side of the circuit breaker and the double bus A gas-insulated switchgear comprising a line-side disconnector connected to the other side of the circuit breaker, and a grounded switch having one end connected to each side of the circuit breaker and the other end grounded. A rotary shaft connected to one of the disconnectors located on the bus side of the breaker and each mover of the grounding switch to transmit an opening / closing operation force; the disconnector located on the line side of the breaker; and A rotary shaft that is connected to each movable element of the grounding switch and transmits the opening / closing operation force is provided, and a common operating device that is connected so as to rotate both the rotary shafts, and is located on the bus side of the circuit breaker. Open the other one of the disconnectors Gas insulated switchgear, characterized in that provided with other dedicated operating unit for operating.   The thing of Claim 2 WHEREIN: The said common operating device is a common rotating shaft which attached two gears or pulleys to the axial direction, and the chain or belt which connected both the rotating shafts to the said two gears or pulleys. A gas insulated switchgear characterized by comprising:   3. The apparatus according to claim 2, wherein the common operating device is configured as a 4-opening / closing position type operating device that drives the rotary shafts to four switching positions, and the disconnecting switch and the grounding switch are provided at each switching position. A gas insulated switchgear configured to be opened and closed. 4. The gas-insulated switchgear according to claim 3, wherein the mover and the stator constituting the line-side disconnector have an inter-electrode structure in contact with each other at two switching positions.

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