JP2013027226A - Gas insulation switching device - Google Patents

Abstract

An object of the present invention is to provide a GIS in which the number of parts is reduced and the volume of an insulating space filled with an insulating gas is reduced.
A GIS according to the present invention is roughly composed of a ground container, a power supply side conductor 7, a load side conductor 8, a bipolar EDS, a VCT side output conductor 1B, and a VCT side input conductor 1A. The bipolar EDS has a current path from the power supply side conductor 7 to the VCT side input conductor 1A and a current path from the VCT side output conductor 1B to the load side conductor 8. More specifically, the two-pole movable contact 4 having the insulating material 17, the two-pole movable contact 2 having the tulip contact 22 for energizing the outer peripheral side of the two-pole movable contact 4, and the two-pole movable contact 4 The two-pole fixed side contact 5 having the tulip contacts 18 and 23 for energizing the inner peripheral side and the outer peripheral side, and the two-pole grounding switch 6 are provided. The bipolar ground switch 6 includes a short-circuit contact band 26, a ground contact band 28, and a ground conductor 27.
[Selection] Figure 2

Description

  The present invention relates to a gas insulated switchgear (hereinafter referred to as GIS), and more particularly to a GIS capable of reducing the volume of an insulating space filled with an insulating gas.

  GIS is a circuit breaker that cuts off the fault current that flows through the main circuit, a disconnect switch that opens the main circuit to isolate the fault section from other healthy sections after the fault current is cut off, and an inspection after the disconnect switch is opened. It has a ground switch or the like for grounding the main circuit conductor in the section.

  In recent years, devices have been combined to reduce the size of GIS and to reduce the installation area. For example, there is used a grounding disconnector (hereinafter referred to as EDS) in which the disconnecting switch and the grounding switch are integrated and the disconnecting switch and the grounding switch are opened and closed using a movable contact driven by a common operating unit. ing. Such a conventional EDS structure is disclosed in Patent Document 1.

  In Patent Document 1, an annular holding metal fitting attached to a frame via a lever, a cylindrical bar-like movable contact fitted into the inner diameter of the holding metal so as to be slidable in the axial direction, and the movable contact include A bus-side fixed contact that contacts the movable contact when moved to one end, a ground-side fixed contact that contacts the movable contact when the movable contact moves to the other end, and the center of the movable contact A load-type fixed contact that is slidably fitted in the vicinity, and by driving the movable contact in the axial direction, a linear type that realizes three positions including disconnector, disconnector, and grounding switch EDS is disclosed.

  FIG. 5 shows a GIS to which this conventional EDS is applied. FIG. 5 shows a general VCT connection line in GIS, a line that is input from the power source side to the EDS 102A (hereinafter referred to as a power source side line), a line 101A that is input from the EDS 102A to the VCT side, and a line 101B that is output from the VCT side to the EDS 102B. , And a line (hereinafter referred to as a load side line) output from the EDS 102B to the load side.

  In the EDS 102A, the mover 104A is operated by the operation unit 103A, and the mover 104A linearly moves between the fixed contact 105A and the grounding switch 106A. Form a position. Similarly, in the EDS 102B, the movable element 104B is operated by the operation unit 103B, and the movable element 104B linearly moves between the fixed side contact 105B and the grounding switch 106B, so that the disconnector enters, disconnects, and grounds switch. Forms three positions.

JP-A-6-84431

  However, the GIS to which the conventional EDS as described above is applied needs to install an EDS and an operation device in each of the power supply side line and the load side line, and the power supply side line needs to be routed toward the EDS102A. The increase in the size of the entire device and the increase in the number of components have been problems.

  In order to solve the above problems, the GIS of the present invention is connected to a ground container filled with an insulating gas, a power supply side conductor and a load side conductor attached to the ground container, and the power supply side conductor and the load side conductor. It comprises a ground disconnector, an operating device connected to the ground disconnector via an insulating lever, and a VCT side conductor connected to the ground disconnector.

  The VCT side conductor has two current paths of a VCT side output conductor and a VCT side input conductor, and the ground disconnector is connected to the current path from the power supply side conductor to the VCT side input conductor and from the VCT side output conductor. A current path toward the load-side conductor, the movable contactor of the ground disconnector having two current paths on the inner and outer peripheral sides with a double concentric conductor with an insulator interposed therebetween, The fixed-side contact conductor of the ground disconnector has two current paths electrically insulated by an insulating material on the inner peripheral side and the outer peripheral side, and the two current paths are the power supply side conductor and the load side conductor, respectively. And two tulip contacts for energizing each of the inner and outer peripheral sides of the movable contact.

  The movable-side contact conductor of the ground disconnector has a disconnect-side current path and a ground-side current path that are electrically insulated by an insulating material, and the disconnect-side current path is for energizing the outer peripheral side of the movable contact. A tulip contact, electrically connected to the VCT side output conductor, the ground side current path having a tulip contact for energizing the inner peripheral side of the movable contact, and electrically connecting the VCT side input conductor The earthing switch of the earthing disconnector is electrically insulated by an insulating material, and has two current paths each having a contact band on the VCT side input / output conductor side and the earthing container side.

  Further, in the present invention, the VCT side input conductor of the movable side contact conductor is bridged via the contact band on the VCT side output conductor and the VCT side input / output conductor side by the movable contactor in a grounded state, The VCT side input conductor and the VCT side output conductor are formed into a loop circuit, and are electrically connected to a ground container, and the VCT side input / output conductor is grounded.

  According to the present invention, with the above-described configuration, two EDSs, two controllers, and the power supply side line have to be routed toward one EDS. It is possible to omit the power supply side line that is routed toward the EDS. Thereby, the effect of reducing the gas section in GIS, reducing the operation space, and reducing the number of components can be obtained. In addition, by reducing the size of the gas compartment, it is possible to reduce the amount of insulating gas used, leading to an improvement in environmental performance.

The side view which shows the example of a line structure of GIS by this invention Detailed view showing the closed state of the EDS constituting the GIS of the present invention Detailed view showing disconnection state of EDS constituting GIS of the present invention Detailed view showing the grounding state of the EDS constituting the GIS of the present invention Side view showing a conventional GIS line configuration example

  Hereinafter, an embodiment of a GIS according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a circuit configuration of the GIS of the present invention. Here, the EDS having a bipolar structure by an insulating material is a bipolar EDS, the movable contact having the bipolar structure is the bipolar movable contact 4, the ground switch having the bipolar structure is the bipolar ground switch 6, and the bipolar The structured fixed side contact is referred to as a two-pole fixed side contact 5, and the two-pole structured movable side contact is referred to as a two-pole movable side contact 2. The two-pole EDS is roughly constituted by a two-pole fixed side contact 5, a two-pole movable side contact 2, a two-pole movable contact 4 and a two-pole grounding switch 6.

  A bipolar conductor connected from the bipolar EDS to the VCT is composed of a reciprocating conductor 1 in which a VCT side input conductor 1A and a VCT side output conductor 1B are integrated by an insulating plate 1C. The VCT side input conductor 1A is connected to a power supply side line of the bipolar EDS. Similarly, the VCT side output conductor 1B is connected to the load side line of the bipolar EDS.

  The two-pole movable contact 4 of the two-pole EDS is operated by the operation device 3 and is connected to the two-pole fixed-side contact 5, the two-pole movable-side contact 2, and the two-pole grounding switch 6 and disconnected. The three states with the grounding switch are formed at the same time. The load side conductor 8 and the power source side conductor 7 connected to the bipolar fixed side contact 5 are connected to the through conductors provided integrally with the spacers 9 and 10, respectively.

  Next, details of the bipolar EDS will be described with reference to FIG. The VCT side input conductor 1A is electrically connected to the contact conductor 13 of the bipolar EDS by the flat conductor 11. The contact conductor 13 has a built-in tulip contact 14. The tulip contact 14 is electrically connected to the power supply side conductor 7 from the movable contact inner peripheral conductor 15 of the two-pole movable contact 4 by a tulip contact 18 built in the two-pole fixed side contact 5.

  The two-pole movable contact 4 has a structure in which the movable contact inner peripheral conductor 15 and the movable contact outer peripheral conductor 16 are insulated by an insulating material 17. Further, the two-pole movable contact 4 is operated by the driving force of the operating device 3 through the insulating lever 25.

  On the other hand, the VCT side output conductor 1 </ b> B is connected to the contact conductor 21 by the flat conductor 12. A tulip contact 22 is attached to the contact conductor 21, and is connected to the load-side conductor 8 by a movable contact outer peripheral conductor 16 via a tulip contact 23 built in the two-pole fixed-side contact 5.

  The power supply side conductor 7 and the load side conductor 8 are insulated by an insulating material 19. Further, the contact conductor 13 and the contact conductor 21 are insulated by an insulating material 30. With such a configuration, a circuit extending from the VCT side input conductor 1A to the power source side conductor 7 via the flat conductor 11, the contact conductor 13, the tulip contact 14, the movable contact inner peripheral conductor 15 and the tulip contact 18, and the VCT side A circuit from the output conductor 1B to the load side conductor 8 through the tulip contact 23 through the flat conductor 12, the contact conductor 21, the tulip contact 22, and the movable contact outer peripheral conductor 16 is formed electrically independently.

  Next, a specific configuration of the ground circuit will be described. The bipolar ground switch 6 includes an insulating material 29, and a short-circuit contact band 26, a conductor 20, a ground contact band 28, a ground conductor 27, and a ground wire 33 attached therein. The conductor 20 is insulated from the contact conductor 13 by insulating materials 31 and 32.

  In the ground state shown in FIG. 4, the VCT side input conductor 1A and the VCT side output conductor 1B are the VCT side input conductor 1A, the flat conductor 11, the contact conductor 13, the tulip contact 14, and the inner periphery of the movable contact of the movable contact 4. Short-circuited by an energization route formed by the conductor 15, the short-circuit contact band 26, the conductors 20 and 24, the contact conductor 21, the flat conductor 12, and the VCT-side output conductor 1B.

  Then, the inner peripheral conductor 15 of the movable contact is electrically connected to the ground contact band 28 built in the ground conductor 27 in a short-circuited state, thereby grounding the VCT side input conductor 1A and the VCT side output conductor 1B simultaneously. . As a result, the residual charge of VCT is grounded.

  Hereinafter, the operation and current path of the bipolar EDS of the present invention will be described with reference to FIGS. In the state with the disconnector shown in FIG. 2, the two-pole movable contact 4 is in a position to bridge the tulip contacts 14 and 18 and the tulip contacts 22 and 23, respectively.

  The current path in FIG. 2 is as follows. The current path on the power source side, that is, the current path from the power source side conductor 7 to the VCT is the power source side conductor 7, the tulip contact 18, the movable contact inner peripheral conductor 15, the tulip contact 14, the contact conductor 13, the flat conductor 11, and the VCT. It is formed by a circuit reaching the side input conductor 1A.

  On the other hand, the load-side current path, that is, the current path from the VCT to the load-side conductor 8 includes the VCT-side output conductor 1B, the flat conductor 12, the contact conductor 21, the tulip contact 22, the movable contact outer peripheral conductor 16, and the tulip contact 23. , Formed by a circuit reaching the load side conductor 8.

  Therefore, the current supplied from the power source side passes through the movable contact inner peripheral conductor 15 and flows to the VCT side, and the current returned from the VCT side is supplied to the load side through the movable contact outer peripheral conductor 16.

  FIG. 3 shows a state where the two-pole EDS is disconnected. FIG. 3 shows a state in which the insulating lever 25 is driven about 30 degrees clockwise by the operating device 3 from the state of FIG. In this state, the two-pole movable contact 4 is in a position where it does not contact the tulip contact 18 and the tulip contact 23, the short-circuit contact band 26, and the ground contact band 28.

  That is, in FIG. 3, the VCT side input conductor 1A and the VCT side output conductor 1B are separated from the power source side conductor 7 and the load side conductor 8, but the VCT side input conductor 1A and the VCT side output conductor 1B are separated. Is not grounded.

  FIG. 4 shows a state in which the two-pole EDS is included in the two-pole ground switch. FIG. 4 shows a state in which the insulating lever 25 is further driven about 30 degrees clockwise by the operating device 3 from the state of FIG. In this state, the movable contact inner peripheral conductor 15 of the two-pole movable contact 4 is electrically connected to the tulip contact 14, the short-circuit contact band 26, and the ground contact band 28.

  The current path in FIG. 4 is as follows. The current path from the VCT side input conductor 1A passes through the VCT side input conductor 1A, the flat conductor 11, the contact conductor 13, the tulip contact 14, and the movable contact inner peripheral conductor 15 to the ground conductor 27 via the ground contact band 28. It reaches. The current path from the VCT side output conductor 1B is connected to the ground via the VCT side output conductor 1B, the flat conductor 12, the contact conductor 21, the conductor 24, the conductor 20 and the shorting contact band 26 through the movable contact inner peripheral conductor 15. From the contact band 28 to the ground conductor 27.

  As described above, with the two-pole EDS according to the present invention, it has been necessary to route two EDSs, two controllers, and the power supply side line toward one EDS. It is possible to omit the power supply side line that is routed toward the EDS while being configured by a single controller.

  Thereby, as is clear from the comparison between FIG. 1 and FIG. 5, the wiring space of the conductor is reduced, and the effect of reducing the GIS size and the number of parts can be obtained. In addition, the use of insulating gas can be reduced by reducing the gas section of the GIS, leading to improvement of environmental performance.

DESCRIPTION OF SYMBOLS 1 Reciprocating conductor 1A VCT side input conductor 1B VCT side output conductor 1C Insulation board 2 Bipolar movable contact 3 Actuator 4 Bipolar movable contact 5 Bipolar fixed contact 6 Bipolar grounding switch 7 Power supply side conductor 8 Load side Conductor 9, 10 Spacer 11, 12 Flat conductor 13, 21 Contact conductor 14, 18, 22, 23 Tulip contact 15 Movable contact inner conductor 16 Movable contact outer conductor 17, 19, 29, 30, 31, 32 Insulation 20, 24 Conductor 25 Insulation lever 26 Short-circuit contact band 27 Ground conductor 28 Ground contact band

Claims (1)

A grounding container filled with an insulating gas, a power supply side conductor and a load side conductor attached to the grounding container, a grounding disconnector connected to the power supply side conductor and the loadside conductor, and an insulating lever on the grounding disconnector A gas-insulated switchgear composed of an operating device connected via a VCT side conductor connected to the ground disconnector;
The VCT side conductor has two current paths of a VCT side output conductor and a VCT side input conductor,
The ground disconnector has a current path from the power supply side conductor to the VCT side input conductor and a current path from the VCT side output conductor to the load side conductor;
The movable contactor of the ground disconnector has two current paths on the inner peripheral side and the outer peripheral side with a double concentric conductor with an insulator interposed therebetween,
The fixed-side contact conductor of the ground disconnector has two current paths electrically insulated by an insulating material on the inner peripheral side and the outer peripheral side, and the two current paths are the power supply side conductor and the load side conductor, respectively. Two tulip contacts that are electrically connected to each other and energize the inner and outer peripheral sides of the movable contact,
The movable contact conductor of the ground disconnector has a disconnect current path and a ground current path that are electrically insulated by an insulating material,
The disconnect side current path has a tulip contact for energizing the outer peripheral side of the movable contact, and is electrically connected to the VCT side output conductor,
The ground side current path has a tulip contact for energizing the inner peripheral side of the movable contact, and is electrically connected to the VCT side input conductor,
The earthing switch of the earthing disconnector is electrically insulated by an insulating material, and has two current paths each having a contact band on the VCT side input / output conductor side and the grounding container side,
In the grounded state, the VCT-side input conductor of the movable-side contact conductor is bridged by the movable contact via the contact band on the VCT-side output conductor and the VCT-side input / output conductor side, and the VCT-side input conductor and the A gas insulated switchgear characterized in that a VCT-side output conductor is formed into a loop circuit, and is electrically connected to a ground container, and the VCT-side input / output conductor is grounded.

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