CN106165046B - Compound shutter - Google Patents

Abstract

The present invention provides the multiple cut-out tasks that can be easily achieved required by the shutter of high voltage and break time short compound shutter.With at least two shutter being connected in series,One in shutter is the vacuum shutter (3) for having vacuum valve in contact portion,One be the contact portion for having insulating strength bigger than vacuum shutter high withstand voltage shutter (5),High withstand voltage shutter (5) and vacuum shutter (3) are filled with insulating properties medium,And accommodate contact portion (9 with one side supporting,19) pressure vessel (7,17) while carrying out pressure vessel (7,17) support (8 being electrically insulated with ground plane,18),Contact-actuating portion (9,19) operating portion (10,20),To operating portion (10,20) power supply unit (11 of supply electric power,21),Attended operation portion (10,20) contact portion (9,19) movable electrode (37,56) with operating portion (10,20) equipotential.

Description

Composite switch

technical field

The technical solution of the present invention relates to a multi-point control composite switch that makes multiple contacts contact or disengage.

Background technique

As for the high-voltage switch responsible for the cut-off task of the accident current, it is required that it can cut off the small current to the large current reliably. Especially with regard to large currents, the following two switching tasks must be fulfilled.

(1) Cut-off of short-distance line fault (SLF) current

In connection with this, the switch is tasked with being able to cope with a voltage that appears at the beginning of the rise of the voltage (transient recovery voltage) immediately after the current zero point, that is, has a low absolute value but has a sharp rate of change The voltage of the triangular waveform.

(2) Breaker terminal short-circuit fault (BTF) current cut-off

In connection with this, the switch bears the role of being able to cope with the applied voltage whose transient recovery voltage rises gently at the initial stage but whose absolute value becomes large later.

In recent years, a blown-arc type (puffa) switch has been widely used. In this switch, a cut-off portion having a contact that can be contacted or separated is housed in a pressure vessel that encloses SF6 gas as an insulating gas. In addition, during the cutting operation, insulating gas is blown onto the contacts to extinguish the arc. In this method, it is necessary to use a single switch to achieve the above two cutting tasks.

Furthermore, a switch is being developed in which the above-mentioned two cutting tasks are realized by connecting the cutting parts specified for each cutting task. That is, it is a switch having a plurality of cutting parts, and each cutting part shares its own cutting task. Such a shutter divides the internal space of a single pressure vessel into two, and constitutes a cutoff portion in each space.

That is, one of the separated internal spaces accommodates an arc-blow type cutting portion having excellent cutting performance of BTF, and an arc-blow type cutting portion having excellent cutting performance of SLF is accommodated in the other. Also, the two cutouts are electrically connected in series.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2003-348721

Contents of the invention

The problem to be solved by the invention

As mentioned above, each cutting part of the switch which connects the two cutting parts specified for each cutting task has a contact which can be contacted or disengaged freely. However, since the actuator that is a single operation unit performs all of the contact opening and closing operations, a large burden is placed on the operation unit. As a result, the type and size of the operation unit are limited, and if the operation energy cannot be increased, there is a problem that the disconnection time becomes longer.

Embodiments of the present invention are proposed to solve the above-mentioned problems of the prior art. Its object is to provide a composite switch that can easily perform multiple switching tasks required by a switch for high voltage and has a short switching time.

means to solve the problem

The composite switch as the embodiment of the present invention is proposed in order to achieve the above-mentioned purpose, and has the following technical characteristics of the invention:

(1) At least two switches connected in series;

(2) At least one of the shutters is a vacuum shutter having a vacuum valve at the contact portion;

(3) At least one of the switches is a high withstand voltage switch having a contact portion having a greater insulation resistance than the vacuum switch;

(4) The high withstand voltage switch and the vacuum switch have the following technical features of the invention:

(4-1) an airtight container filled with an insulating medium and containing the contact portion;

(4-2) a support portion that supports the airtight container and electrically insulates the airtight container from the ground plane;

(4-3) An operation unit that drives a movable electrode included in the contact unit;

(4-4) a power supply unit that supplies power to the operation unit;

(5) The high withstand voltage switch also has the following technical features of the invention:

(5-1) The operating portion and the movable electrode of the contact portion connected to the operating portion are at the same potential.

Description of drawings

Fig. 1 is a cross-sectional view showing the overall structure of a composite switch according to a first embodiment, showing an inserted state.

Fig. 2 is a cross-sectional view showing the overall structure of the composite switch according to the first embodiment, showing a cut state.

Fig. 3 is a partially enlarged cross-sectional view of Fig. 1, (A) showing a vacuum switch, and (B) showing a high withstand voltage switch.

Fig. 4 is a partially enlarged cross-sectional view of Fig. 2, (A) showing a vacuum switch, and (B) showing a high withstand voltage switch.

Fig. 5 is a partially enlarged cross-sectional view of a vacuum shutter according to a second embodiment, showing an inserted state.

Fig. 6 is a partially enlarged cross-sectional view of the vacuum shutter according to the second embodiment, showing a cut-off state.

FIG. 7 is a partially enlarged cross-sectional view of FIG. 5 .

FIG. 8 is a partially enlarged cross-sectional view of FIG. 6 .

Fig. 9 is a cross-sectional view showing the overall structure of the composite switch according to the third embodiment, showing the inserted state.

10 is a cross-sectional view showing the overall structure of the composite switch according to the third embodiment, showing a cut state.

FIG. 11 is a partially enlarged cross-sectional view of FIG. 9 .

FIG. 12 is a partially enlarged cross-sectional view of FIG. 10 .

Fig. 13 is a cross-sectional view of a high withstand voltage switch according to a fourth embodiment.

Fig. 14 is a cross-sectional view of a high withstand voltage switch according to a fifth embodiment.

Fig. 15 is a cross-sectional view showing the overall structure of a composite switch according to a sixth embodiment.

Fig. 16 is a partially enlarged cross-sectional view of a high withstand voltage switch according to a seventh embodiment.

detailed description

[the first embodiment]

The configuration of the composite switch according to the first embodiment will be described with reference to FIGS. 1 to 4 . Fig. 1 and Fig. 2 are sectional views showing the overall structure of the composite switch according to this embodiment, Fig. 1 showing the input state, and Fig. 2 showing the disconnected state. FIG. 3 is a partially enlarged sectional view of FIG. 1 , and FIG. 4 is a partially enlarged sectional view of FIG. 2 .

[the whole frame]

First, the overall configuration of this embodiment will be described with reference to FIGS. 1 and 2 . The composite switch 1 of the present embodiment includes a vacuum switch 3 and a high withstand voltage switch 5 . The vacuum shutter 3 is a shutter having a vacuum valve 2 at a contact point. The high withstand voltage switch 5 is a switch having a contact 4 with a higher dielectric strength than the vacuum switch 3 . The vacuum shutter 3 and the high withstand voltage shutter 5 are juxtaposed in the horizontal direction on a base 16 serving as an installation surface, and are electrically connected in series to each other via an insulated wire 6 .

(Summary of Vacuum Switches)

The vacuum shutter 3 has a pressure vessel 7 , a support portion 8 , a contact portion 9 , an operation portion 10 , and a power supply portion 11 . The pressure vessel 7 is a cylindrical airtight vessel made of insulating insulators and metal. Openings at both ends of the insulator which is the trunk portion of the pressure vessel 7 are sealed by metal covers 12 , 13 . The metal covers 12, 13 are electrically insulated. At the ends of the respective metal covers 12, 13, current conducting plates 14, 15 are provided. The vacuum switch 3 is connected to a bus bar (not shown) via the current-carrying plate 14 , and is connected to the high-voltage switch 5 via the insulated wire 6 from the current-carrying plate 15 . The insulated electric wire 6 is an electric wire whose insulation from the outside is ensured by an insulating coating or the like.

The support portion 8 is a member that supports the pressure vessel 7 and ensures insulation between the pressure vessel 7 and the ground. The support portion 8 is provided between the base 16 on which the vacuum shutter 3 is fixed and the pressure vessel 7 in a high voltage state. Thus, the support portion 8 mechanically supports the pressure vessel 7 and ensures an insulating distance between the base 16 and the pressure vessel 7 . That is, the support portion 8 ensures electrical insulation between the pressure vessel 7 and the ground plane.

The contact part 9 has the vacuum valve 2 and the shield 65 . The contact part 9 is housed in the pressure vessel 7 and connected to the metal covers 12 and 13 of the pressure vessel 7 directly or via the operation part 10 .

The operation unit 10 is a mechanism for driving the vacuum valve 2 of the contact unit 9 . The operating part 10 is connected to the end of the pressure vessel 7, and gives kinetic energy to the vacuum valve 2 of the contact part 9 to drive the vacuum valve 2 to contact or disengage, open or close. Thereby, the energization state of the vacuum shutter 3 is switched. The power supply unit 11 is provided on the base 16 and is a power supply source for the operation unit 10 to function.

(Outline of high withstand voltage switch)

The high withstand voltage switch 5 has a pressure container 17 , a support portion 18 , a contact portion 19 , an operation portion 20 , and a power supply portion 21 . The pressure vessel 17 is a cylindrical airtight vessel made of an insulating insulator and metal. Openings at both ends of the insulator which is the trunk portion of the pressure vessel 17 are sealed by metal covers 22 , 23 . The metal covers 22, 23 are electrically insulated. At the ends of the respective metal covers 22, 23, current conducting plates 24, 25 are provided. The high withstand voltage switch 5 is connected to the vacuum switch 3 via the insulated wire 6 from the current supply plate 24 , and is connected to a bus bar (not shown) via the current supply plate 25 .

The support portion 18 is a member that supports the pressure vessel 17 and ensures insulation between the pressure vessel 17 and the ground. The supporting part 18 is provided between the base 16 on which the high withstand voltage switch 5 is fixed and the pressure vessel 17 in a high voltage state, mechanically supports the pressure vessel 17 and ensures an insulating distance between the base 16 and the pressure vessel 17 . That is, the support portion 18 ensures electrical insulation between the pressure vessel 17 and the ground plane.

The contact part 19 has the contact 4 and shields 66 , 67 . The contact part 19 is housed in the pressure vessel 17 and connected to the metal covers 22 and 23 of the pressure vessel 17 directly or via the operation part 20 .

The operation unit 20 is a mechanism for driving the contacts 4 of the contact unit 19 . The operating part 20 is connected to the end of the pressure vessel 17, and applies kinetic energy to the contact 4 of the contact part 19 to drive the contact 4 to make contact or disengagement, open or close. As a result, the energization state of the high withstand voltage switch 5 is switched. The power supply unit 21 is provided on the base 16 and is a power supply source for the operation unit 20 to function.

When the composite switch 1 as described above is in the input state, as shown in FIG. Then, the current passes through the insulated wire 6 , passes through the current conducting plate 24 , the metal cover 22 , the operation unit 20 , the contacts 4 , and the metal cover 23 in order, and is led out to the current conducting plate 25 . In addition, when the composite switch 1 is in the cut-off state, as shown in FIG. 2 , the vacuum valve 2 of the vacuum switch 3 and the contact 4 of the high withstand voltage switch 5 are separated, and the current is cut off.

[detailed structure]

Hereinafter, the detailed configuration of this embodiment will be described.

(vacuum switch)

First, referring to FIG. 3(A) and FIG. 4(A), the pressure vessel 7, the support portion 8, the contact portion 9, the operation portion 10, and the power supply portion 11 constituting the vacuum shutter 3 outlined above will be described. In addition, FIG. 3(A) and FIG. 4(A) are enlarged cross-sectional views of the vacuum shutter 3, FIG. 3(A) shows the input state, and FIG. 4(A) shows the disconnected state.

(1) Pressure vessel

The pressure vessel 7 has an insulator box 26 and metal covers 12 and 13 . The insulator box 26 has an insulating tube 27 with openings at both ends as a main body, and metal flanges 28 and 29 are respectively bonded to the opening ends. The metal covers 12, 13 are connected to the metal flanges 28, 29 respectively.

The internal space 68 of the pressure vessel 7 is in a sealed state. The internal space 68 is filled with an insulating medium. The insulating medium may be, for example, sulfur hexafluoride gas (SF6 gas), carbon dioxide, nitrogen, dry air, a mixed gas of the above gases, insulating oil, or the like. In this embodiment, SF6 gas is filled.

(2) Support part

The support portion 8 has support insulators 30 , 31 , support structures 32 , 33 , and connecting metal fittings 34 , 35 . The support structures 32 and 33 are upright metal pedestals, and their lower ends are connected to the base 16 . The support insulators 30 and 31 are support beams that insulate the metal parts at both ends with insulating insulators. The lower ends of the support insulators 30 and 31 are connected to the upper ends of the support structures 32 and 33 . The upper ends of the support insulators 30 , 31 are connected to the metal covers 12 , 13 via connecting metal fittings 34 , 35 .

Thus, the support portion 8 supports the pressure vessel 7 in a structurally stable state. In addition, the lengths of the support insulators 30 and 31 are designed to be longer than the insulation distance of the pressure vessel 7 to the ground (support structure).

(3) Contact part

The contact part 9 has a vacuum valve 2 and a shield 65 . The vacuum valve 2 has a fixed electrode 36, a movable electrode 37, a vacuum container 2a, and a bellows 2b. The fixed electrode 36 is directly connected to the metal cover 13 . The movable electrode 37 is connected to the metal cover 12 via the driving device 38 of the operation unit 10 .

The vacuum container 2 a is a container that accommodates the fixed electrode 36 and the movable electrode 37 and is made of an insulator sealed in a vacuum state. The bellows 2b is a flexible telescopic member, and attaches the movable electrode 37 so as to be movable with respect to the vacuum container 2a while maintaining an airtight state. In addition, the pressure of the gas in the internal space 68 is not more than the gas pressure of the internal space 69 described later and not less than the atmospheric pressure. This is the pressure that the bellows 2b can withstand. The shield 65 is arranged to alleviate the concentration of the electric field around the vacuum valve 2 and is connected to the metal cover 12 .

(4) Operation Department

The operation unit 10 has a drive device 38 and a control device 39 . The driving device 38 is connected to the metal cover 12 inside the pressure vessel 7 . The driving shaft of the driving device 38 is connected to the movable electrode 37, and drives the vacuum valve 2 in a freely contactable or detachable manner. In addition, by using a conductive material instead of an insulating material at the connection portion between the driving device 38 and the movable electrode 37 , the respective potentials are equalized. As the conductive material, it is preferable to use a metal material with high conductivity. The control device 39 is connected to the metal cover 12 outside the pressure vessel 7 , and is connected to the drive device 38 through the insulated wire 40 penetrating the metal cover 12 . Accordingly, the control device 39 controls the operation of the drive device 38 by adjusting the electric power supplied to the drive device 38 .

The operating unit 10 pushes and pulls the movable electrode 37 in a straight line by applying a driving force to the mechanically connected movable electrode 37 , so that the movable electrode 37 contacts or separates from, opens or closes with respect to the fixed electrode 36 . In addition, the operation of the operation unit 10 can be started, for example, when the control device 39 receives a command signal from a signal output device (not shown) provided outside the vacuum shutter 3 . In addition, an unillustrated sealing portion having an elastomer gasket is provided on the metal cover 12 of the pressure vessel 7 through which the insulated wire 40 passes, so as to maintain the airtightness of the internal space 68 .

(5) Power supply unit

The power supply unit 11 has a transformer 41 , a bus bar 42 , a pressure vessel 161 , and an insulating tube 162 . The container of the transformer 41 and the pressure container 161 are fixed to the base 16 via the supporting structure 163 . The opening of the container of the transformer 41 is connected to one opening of the pressure container 161 . On the other hand, the other opening of the pressure vessel 161 is connected to the opening of the insulating tube 162 . The transformer 41, the pressure vessel 161, and the insulating tube 162 share an internal space 164, which is sealed and filled with an insulating medium. The filled insulating medium is the same as above. The primary side of the transformer 41 is connected to the bus bar 42 via an insulated wire 43 . In addition, the secondary side of the transformer 41 is connected to an insulated wire 44 . The insulated wire 44 passes through the internal space 164 , penetrates the end of the insulating tube 162 on the operation unit 10 side, and is connected to the control device 39 of the operation unit 10 . The transformer 41 and the insulating tube 162 through which the insulated electric wires 43 and 44 pass are provided with a sealing part having an elastomer gasket (not shown) to maintain the airtightness of the inner space 164 . The insulation resistance between the primary side and the secondary side of the transformer 41 and the insulation resistance between both ends of the insulating tube 162 are designed to be greater than the insulation resistance required between the pressure vessel 7 and the ground. The bus bar 42 is connected to a power supply source not shown.

The electric power from the power supply source supplied from the bus bar 42 is boosted by the transformer 41 to a voltage required to drive the operation unit 10 and supplied to the operation unit 10 . That is, the power supply unit 11 supplies electric power to the operation unit 10 whose ground voltage is in a high voltage state without being grounded.

(High withstand voltage switch)

Next, referring to FIG. 3(B) and FIG. 4(B), the pressure vessel 17, the supporting part 18, the contact part 19, the operating part 20 and the power supply part 21 constituting the high pressure switchgear 5 summarized above are carried out. illustrate. In addition, FIG. 3(B) and FIG. 4(B) are enlarged cross-sectional views of the high withstand voltage switch 5, FIG. 3(B) shows the input state, and FIG. 4(B) shows the disconnected state.

(1) Pressure vessel

The pressure vessel 17 has an insulator box 45 and metal covers 22 and 23 . The insulator box 45 has an insulating tube 46 with both ends opened as a main part, and metal flanges 47 and 48 are respectively bonded to the two ends of the opening. The metal covers 22, 23 are connected to the metal flanges 47, 48 respectively.

The internal space 69 of the pressure vessel 17 is sealed, and the internal space 69 is filled with an insulating medium. The filled insulating medium is the same as above.

(2) Support part

The support portion 18 has support insulators 49 , 50 , support structures 51 , 52 , and connecting metal fittings 53 , 54 . The support structures 51 and 52 are upright metal pedestals, and their lower ends are connected to the base 16 . The support insulators 49 and 50 are support beams insulated from the metal parts at both ends by insulating insulators. The lower ends of the support insulators 49 and 50 are connected to the upper ends of the support structures 51 and 52 . Upper ends of support insulators 49 and 50 are connected to metal covers 22 and 23 via connection metal fittings 53 and 54 .

Thus, the support portion 18 supports the pressure vessel 17 in a structurally stable state. In addition, the lengths of the support insulators 49 and 50 are designed to be longer than the insulation distance of the pressure vessel 17 to the ground (support structure). This ensures electrical insulation from the ground plane of the pressure vessel 17 .

(3) Contact part

The contact part 19 has the contact 4 and shields 66 and 67 . The contact 4 has a fixed electrode 55 and a movable electrode 56 . The fixed electrode 55 is directly connected to the metal cover 23 . The movable electrode 56 is connected to the metal cover 22 via the driving device 57 of the operation unit 20 . The shields 66 and 67 are disposed so as to alleviate the electric field concentration around the contacts 4, and are connected to the metal covers 22 and 23, respectively.

(4) Operation Department

The operation unit 20 has a drive device 57 and a control device 58 . The driving device 57 is connected to the metal cover 22 inside the pressure vessel 17 . The driving shaft of the driving device 57 is connected to the movable electrode 56, and drives the contact 4 so that it can be brought into or out of contact. In addition, by using a conductive material instead of an insulating material at the connection portion between the driving device 57 and the movable electrode 56 , each has the same potential. As the conductive material, it is preferable to use a metal material with high conductivity. The control device 58 is connected to the metal cover 22 outside the pressure vessel 17 , and is connected to the driving device 57 through an insulated wire 59 penetrating the metal cover 22 . Accordingly, the control device 58 controls the operation of the drive device 57 by adjusting the electric power supplied to the drive device 57 .

The operating unit 20 pushes and pulls the movable electrode 56 in a straight line by applying a driving force to the mechanically connected movable electrode 56 , so that the movable electrode 56 contacts or separates from, opens or closes with respect to the fixed electrode 55 . In addition, the operation of the operation unit 20 can be started, for example, when the control device 58 receives a command signal from a signal output device (not shown) provided outside the high withstand voltage switch 5 .

In addition, an unillustrated sealing portion having an elastomer gasket is provided on the metal lid 22 of the pressure vessel 17 through which the insulated wire 59 passes, so that the airtightness of the internal space 69 is maintained.

(5) Power supply unit

The power supply unit 21 has a transformer 60 , a bus bar 61 , a pressure vessel 165 , and an insulating tube 166 . The vessel and pressure vessel 165 of the transformer 60 are fixed to the base 16 via a support structure 167 . The opening of the container of the transformer 60 is connected to one opening of the pressure container 165 . On the other hand, the other opening of the pressure vessel 165 is connected to the opening of the insulating tube 166 . The transformer 60, the pressure vessel 165, and the insulating tube 166 share an internal space 168, which is airtight and filled with an insulating medium. The filled insulating medium is the same as above. The primary side of the transformer 60 is connected to a bus bar 61 via an insulated wire 62 . In addition, the secondary side of the transformer 60 is connected to an insulated wire 63 . The insulated wire 63 passes through the internal space 168 , penetrates the end portion of the insulating tube 166 on the side of the operation unit 20 , and is connected to the control device 58 of the operation unit 20 . The transformer 60 and the insulating tube 166 through which the insulated electric wires 62 and 63 penetrate are provided with a sealing portion having an elastomer gasket (not shown) to maintain the airtightness of the internal space 168 . The insulation resistance between the primary side and the secondary side of the transformer 60 and the insulation resistance between both ends of the insulating tube 166 are designed to be greater than the insulation resistance required between the pressure vessel 17 and the ground. The bus bar 61 is connected to a power supply source not shown.

The electric power from the power supply source supplied from the bus bar 61 is boosted by the transformer 60 to a voltage required to drive the operation unit 20 and supplied to the operation unit 20 . That is, the power supply unit 21 supplies electric power to the operation unit 20 whose ground voltage is in a high voltage state without being grounded.

[effect]

The operation of the present embodiment as described above will be divided into the input state and the cut-off operation, and will be described. In addition, the input state is shown in FIG. 1, FIG. 3(A)(B), and the cutting operation is shown in FIG. 2, FIG. 4(A)(B).

(input status)

First, when the composite switch 1 is in the ON state, the current introduced from the current-carrying plate 14 flows to the metal cover 12 , the driving device 38 , the movable electrode 37 , the fixed electrode 36 , the metal cover 13 , and the current-carrying plate 15 . Then, the electric current is drawn from the current conducting plate 15 to the current conducting plate 25 through the current conducting plate 24 , the metal cover 22 , the driving device 57 , the movable electrode 56 , the fixed electrode 55 , and the metal cover 23 via the insulated wire 6 .

(cutting action)

On the other hand, when a command signal to cut off the current is given from the outside of the composite switch 1 , a driving force is given to the movable electrodes 37 , 56 connected to the driving devices 38 , 57 . As a result, the movable electrodes 37 and 56 are separated from the fixed electrodes 36 and 55 at the same time, and the current interruption starts.

Specifically, in the vacuum shutter 3 , the movable electrode 37 of the vacuum valve 2 is separated from the fixed electrode 38 . In this process, an arc composed of particles and electrons evaporated from the electrodes is generated between the movable electrode 37 and the fixed electrode 38 . However, since the inside of the vacuum valve 2 is a high vacuum, the substance constituting the arc diffuses and disappears without leaving a shape. Accordingly, the energizing current can be cut off.

On the other hand, in the high withstand voltage switch 5, the movable electrode 56 of the contact 4 is separated from the fixed electrode 55, and an arc is generated between the electrodes, but the arc is extinguished by securing the insulating distance between the electrodes.

During this cutting process, separation gas of SF6 gas generated by the arc is generated in the internal space 69 of the high withstand voltage switch 5 . This separation gas has the effect of corroding the surface layer of the vacuum vessel 2 a constituted by the insulation of the vacuum valve 2 . However, since the vacuum container 2a is accommodated in the pressure container 7 of the vacuum shutter 3, there is no concern about corrosion caused by the separation gas generated in the internal space 69.

In addition, the bellows 2b included in the vacuum valve 2 may not be good in high pressure resistance. In the present embodiment, the gas pressure of the internal space 68 is set to a pressure that the bellows 2b can withstand, that is, the gas pressure of the internal space 69 is not higher than the atmospheric pressure. Thereby, the bellows 2b in the internal space 68 is protected while ensuring the dielectric strength of the contacts 4 in the internal space 69 .

As described above, in the present embodiment, during the interruption process, the vacuum switch 3 is in charge of the sudden transient recovery voltage in the SLF interruption task, and the high withstand voltage switch 5 with high insulation resistance is in charge of the BTF interruption operation. High transient recovery voltage. In this way, two cutting tasks can be easily achieved.

[Effect]

The effects of the present embodiment as described above are as follows.

(1) Since there are a plurality of switches and operation units for driving the respective contact units, the load on each operation unit is reduced, and the contacts can be separated at high speed. That is, since there is an operation part 10 for driving the contact part 9 of the vacuum switch 3, and an operation part 20 for driving the contact part 19 of the high withstand voltage switch 5, the respective functions of the operation part 10 and the operation part 20 can be controlled. The load is reduced, enabling high-speed separation.

(2) At least one of the plurality of switches is in charge of the SLF cutoff task, and at least one is in charge of the BTF cutoff task, so both tasks can be easily achieved. That is, as one switch, a vacuum switch 3 having a vacuum valve 2 is used, and as one switch, a high withstand voltage switch 5 having a contact 4 having a higher dielectric strength than the vacuum valve 2 is used. Thus, during the cutoff process, the vacuum switch 3 can bear the sudden transient recovery voltage in the SLF cutoff task. In addition, the high withstand voltage switch 5 with high insulation resistance can undertake the high transient recovery voltage in the BTF interruption task.

(3) Since the driving device and the movable electrode are at the same potential, it is not necessary to secure an insulating distance between the driving device and the movable electrode for a plurality of switches. Therefore, a connecting portion made of an insulating material is unnecessary. Accordingly, the weight of the movable portion is reduced, and the contacts can be separated at high speed. That is, the driving device 38 of the operating unit 10 of the vacuum switch 3 is at the same potential as the movable electrode 37 , and the driving unit 57 of the operating unit 20 of the high withstand voltage switch 5 is at the same potential as the movable electrode 56 . Accordingly, the distance between the driving devices 38 and 57 and the movable electrodes 37 and 56 can be shortened.

In addition, since the connection portion of the insulating material is less rigid than a metal material, the insulating material is greatly stretched at the initial stage of the cutting operation, causing a delay in the response of the movable electrode to the operation of the drive device. In this embodiment, since there is no connecting portion of the insulating material, it is possible to prevent a delay in the response of the movable electrodes 37 and 56 to the operation of the driving devices 38 and 57 .

In addition, since the drive device 38 is disposed in the pressure vessel 7 and the drive device 57 is disposed in the pressure vessel 17, the distance between the drive devices 38, 57 and the movable electrodes 37, 56 can be further shortened, and the movable electrodes 37, 56 can be reduced. the weight of the part.

In addition, since the connecting portion between the drive unit and the movable electrode does not penetrate the pressure vessel, response delay due to sliding friction between the connecting portion and the pressure vessel, gas leakage, and the number of parts due to the provision of the sealing portion can be prevented. increase etc.

(4) Compared with the conventional switch having a plurality of blown-type contact parts, the present embodiment can cut off the current and secure the insulation distance in a shorter time, so the cutoff time can be shortened. That is, since the vacuum valve 2 has contact contacts and the weight of the movable electrode 37 is also small, the vacuum switch 3 can perform a very short shutoff operation. In addition, the high withstand voltage switch 5 also has a dedicated operation unit 20 as an arc-blow type gas contact unit. Thereby, as a whole of the composite switch 1, the load on each operation part 10, 20 can be reduced, and the contact 4 can be separated at high speed. Moreover, when the high withstand voltage switch 5 does not have an arc blowing cylinder or a nozzle on the movable electrode 56, compared with an arc blowing type contact, the weight of the movable part driven by the operation part 57 reduce. As a result, the operation unit 57 of the high withstand voltage switch 5 can drive the movable electrode 56 at a higher speed, so the time required for securing the insulation distance can be significantly shortened.

(5) Since the contact part is separated for each different switch and the space for accommodating each contact part is independent, it is possible to apply different pressures to the respective spaces. More specifically, the gas pressure of the internal space 68 is set to be equal to or less than the gas pressure of the internal space 69 and equal to or greater than atmospheric pressure. Accordingly, it is possible to protect the bellows 2b in the internal space 68 while ensuring the dielectric strength of the contacts in the internal space 69 . In addition, the vacuum vessel 2 a is accommodated in a pressure vessel 7 . Therefore, in the cutting process, the separation gas of SF6 gas generated due to the arc generated in the internal space 69 is no longer in direct contact with the vacuum container 2a made of the insulating member of the vacuum valve 2, and corrosion caused by the separation gas can be prevented. effect.

[the second embodiment]

[structure]

A second embodiment will be described with reference to FIGS. 5 to 8 . In addition, FIGS. 5 and 6 are enlarged cross-sectional views of the vacuum shutter 3 according to the second embodiment, FIG. 5 shows a state where the vacuum shutter 3 is put in, and FIG. 6 shows a state where the vacuum shutter 3 is disconnected. 7 and 8 are enlarged cross-sectional views of the electromagnetic repulsion driving device 71 in FIGS. 5 and 6, respectively.

The basic structure of this embodiment is the same as that of the first embodiment. Therefore, only the points different from the first embodiment will be described, and the same reference numerals will be assigned to the same parts as the first embodiment, and detailed description will be omitted.

In this embodiment, the electromagnetic repulsion driving device 71 is used as the driving device 38 of the operation unit 10 of the vacuum shutter 3 . The electromagnetic repulsion driving device 71 utilizes electromagnetic repulsion force as a driving force for the opening operation, and has high responsiveness during the opening operation. This electromagnetic repulsion driving device 71 has a mechanism case 72 , a high-speed disconnection unit 73 , a wiping mechanism unit 74 , and a holding mechanism unit 75 . Hereinafter, each part will be described in detail.

(mechanism box)

The mechanism case 72 is a case having an opening at one end on the vacuum valve 2 side and having a hollow interior. A support portion 80 is fixed to the opening of the mechanism case 72 as a wall surface that partitions the mechanism case 72 from the outside. A hole 80 a for slidingly supporting the movable electrode 37 of the vacuum valve 2 is formed at the center of the support portion 80 .

The bottom surface of the mechanism case 72 opposite to the support portion 80 side is fixedly connected to the wall surface of the metal cover 12 inside the pressure vessel 7 . Such a mechanism case 72 accommodates a high-speed disconnection unit 73 , a wiper mechanism unit 74 , and a holding mechanism unit 75 .

(high-speed disconnection part)

The high-speed disconnection unit 73 has a movable shaft 76 , an electromagnetic repulsion coil 77 , a repulsion ring 78 , and a repulsion ring receiving portion 79 .

The movable shaft 76 is a rod-shaped body coaxially connected to the movable electrode 37 of the vacuum valve 2 . The repelling ring receiving portion 79 is an annular body fitted into the movable shaft 76 and integrated with the movable shaft 76 . The repelling ring 78 is an annular body made of a good conductor. The repelling ring 78 is coaxially fixed on the surface of the repelling ring receiving portion 79 on the vacuum valve 2 side.

The electromagnetic repulsion coil 77 is made of a good conductor, and is a coil fixed to a surface facing the repulsion ring 78 of the support portion 80 . Here, the repulsion ring 78 is a good conductor facing the electromagnetic repulsion coil 77 . The electromagnetic repulsion coil 77 is connected to the control device 39 via the insulated wire 40 . The control device 39 is a coil excitation means, and can excite the electromagnetic repulsion coil 77 by supplying electric power via a capacitor in the control device 39 .

That is, the electromagnetic repulsion coil 77 is excited by the electric power from the control device 39, an electromagnetic repulsion force is generated between the electromagnetic repulsion coil 77 and the repulsion ring 78, and the movable shaft 76 is driven to the right in the drawing. In addition, examples of good conductors used in the electromagnetic repulsion coil 77 and the repulsion ring 78 include copper, silver, gold, aluminum, and iron.

(Wiping Mechanism Department)

The wiper mechanism part 74 transmits the electromagnetic repulsion force generated in the high-speed disconnection part 73 to the holding mechanism part 75 . The wiper mechanism part 74 has a flange 81 , a cup ring 82 , a wiper spring 83 , a flange pressing plate 84 , and a shock absorber 85 .

The flange 81 is an annular plate member coaxially fitted to the movable shaft 76 . The cup ring 82 is a flat plate arranged to face the flange 81 , and is fixed to an end of a leg 89 a of a movable portion 89 described later. One end of the wiper spring 83 abuts on the flange 81 and the other end abuts on the cup ring 82 in a state where a biasing force is applied to the flange 81 and the cup ring 82 .

The flange pressing plate 84 is a bottomed cylindrical body. The flange pressing plate 84 surrounds the flange 81 and the wiper spring 83 , and its end opposite to the bottom surface is fixed to the cup ring 82 . Thus, the bottom surface of the flange holding plate 84 functions as a stop for the flange 81 . In addition, an opening is provided in the bottom surface of the flange holding plate 84, and the movable shaft 76 is inserted so as to be able to move.

The shock absorber 85 is fixed to the cup ring 82 . Shock absorber 85 has elasticity and strength capable of absorbing shock from movable portion 89 . Accordingly, the shock absorber 85 suppresses the shock when the movable shaft 76 collides.

(holding mechanism part 75)

The holding mechanism part 75 has a permanent magnet 86 , an open spring 87 , an electromagnetic solenoid 88 , a movable part 89 , and a shock absorber 90 . The above-mentioned permanent magnet 86 , open spring 87 , electromagnetic solenoid 88 , movable part 89 , and shock absorber 90 are accommodated in a space opposite to the high-speed disconnection part 73 formed by the support part 91 and the inner surface of the mechanism case 72 . The support portion 91 is a partition plate that partitions the internal space of the mechanism case 72 in a direction perpendicular to the axis on the inner surface of the mechanism case 72 .

The movable part 89 is made of a ferromagnetic body, and an attractive force acts between the movable part 89 and the permanent magnet 86 . The cross section of the movable part 89 is substantially T-shaped, and the leg 89a serving as the axis is inserted through the opening 91a provided in the center of the support part 91 , extends toward the high-speed disconnect part 73 , and is fixed to the cup ring 82 . The leg 89a is slidably supported by the opening 91a of the support portion 91 . In addition, at the root of the legs 89a of the T-shaped hands 89b of the movable part 89, a trunk 89c having a diameter larger than the legs 89a and smaller than the diameters of the hands 89b is formed. An electromagnetic solenoid 88 to be described later is provided around the trunk 89c.

The permanent magnet 86 is fixed to a wall surface of the support portion 91 opposite to the side of the high-speed opening portion 73 , and faces both hands 89 b of the movable portion 89 . The permanent magnet 86 generates an attractive force in the gap between the permanent magnet 86 and the T-shaped hands 89 b of the movable part 89 . The permanent magnet 86 and the electromagnetic solenoid 88 generate thrust in a direction to close the movable electrode 37 constituting the contact point of the vacuum valve 2 with respect to both hands 89 b of the movable portion 89 .

The open spring 87 is provided between both hands 89 b of the movable part 89 and the wall surface of the support part 91 provided with the permanent magnet 86 so as to bias the movable part 89 . In addition, as the open circuit spring 87, the above-mentioned active force is larger than the sum of the self-closing force of the vacuum valve 2 and the attraction force of the permanent magnet 86 in the open circuit state, and is larger than the attraction force of the permanent magnet 86 to the movable part 89 in the closed circuit state. Spring with low force.

The electromagnetic solenoid 88 is a coil made of a conductive member, and is wound and fixed to the main body 89 c of the movable part 89 . Like the electromagnetic repulsion coil 77 , the electromagnetic solenoid 88 is connected to the control device 39 via the insulated wire 40 , is supplied with electric power from a power source in the control device 39 , and can be excited.

The shock absorber 90 is fixed to the inner surface of the mechanism case 72 facing the both hands 89 b of the movable part 89 . The shock absorber 90 has elasticity and strength capable of absorbing a shock from the movable portion 89 . Thereby, the shock absorber 90 suppresses the shock when the movable part 89 collides.

[effect]

The operation of the present embodiment as described above will be divided into the input state and the cut-off operation, and will be described. Fig. 5 and Fig. 7 show the input state, and Fig. 6 and Fig. 8 show the cutting operation.

(input status)

First, the input state of the present embodiment will be described. In the input state, the fixed electrode 36 and the movable electrode 37 of the vacuum valve 2 come into contact with a predetermined load.

With respect to the movable portion 89 , the attractive force acting in the closed-circuit direction by the permanent magnet 86 is greater than the force in the open-circuit direction by the wiper spring 83 and the open-circuit spring 87 . Thereby, both hands 89 b of the movable part 89 compress the open spring 87 by the attractive force of the permanent magnet 86 and come into contact with the support part 91 , whereby the movable part 89 is fixed to the support part 91 .

On the other hand, due to this attractive force, the movable electrode 37 comes into contact with the fixed electrode 36 via the movable shaft 76 , and applies a biasing force in the closed-circuit direction by the wiper spring 83 .

In this way, the fixed electrode 36 and the movable electrode 37 of the vacuum valve 2 are in contact with the load by the wiper spring 83 , and the engaged state (closed circuit state) is maintained by the attraction force of the permanent magnet 86 to the movable part 89 .

(cutting action)

Next, the disconnection operation of the electromagnetic repulsion drive device 71 during the disconnection operation of the present embodiment will be described. First, in the closed circuit state where the fixed electrode 36 and the movable electrode 37 of the vacuum valve 2 are in contact, an opening command is given to the control device 39 from the outside of the shutter. Then, electric power is supplied from the capacitor of the control device 39 to the electromagnetic repulsion coil 77, and the electromagnetic repulsion coil 77 is excited.

Thus, an electromagnetic repulsion force is generated between the electromagnetic repulsion coil 77 and the repulsion ring 78, and the movable electrode 37 moves from the fixed electrode 36 to the direction of the electromagnetic repulsion drive device 71 at high speed through the repulsion ring receiving portion 79 and the movable shaft 76. Disconnect action. Hereinafter, the direction of the opening operation of the vacuum valve 2 is referred to as an opening direction. In addition, this reverse direction is called a closed-circuit direction.

The movable shaft 76 moves in the opening direction, and the flange 81 compresses the wiper spring 83 and collides with the shock absorber 85 . At this time, the movable shaft 76 uses the shock absorber 85 to reduce the rebound in the closed circuit direction, and presses the cup ring 82 in the open circuit direction via the wiper spring 83 and the shock absorber 85 .

On the other hand, power is supplied from the control device 39 to the electromagnetic solenoid 88 of the holding mechanism portion 75 until the cup ring 82 is pressed in the opening direction by the movable shaft 76 . Accordingly, the electromagnetic solenoid 88 is excited in a direction in which the magnetic flux of the permanent magnet 86 is eliminated, and the attractive force generated in the gap between the hands 89b of the movable part 89 and the permanent magnet 86 is reduced. Then, the movable portion 89 is driven in the opening direction by the urging force of the opening spring 87 .

Furthermore, when the flange pressing plate 84 abuts against the flange 81 via the cup ring 82, the movable portion 89 pulls the cup ring 82, the flange pressing plate 84, and the flange 81 integrally, and moves the movable electrode through the movable shaft 76. 37 is further disconnected.

Thereafter, the movable electrode 37 is separated from the fixed electrode 36 by the inertial force of the movable electrode 37 and the movable shaft 76 and the urging force of the open spring 87 to form a predetermined gap, and the movable part 89 collides with the shock absorber 90. . This impact is absorbed by the impact absorber 90, and the movable part 89 stops.

In addition, the predetermined gap refers to the distance between the fixed electrode 36 and the movable electrode 37 required to cut off the current. After the distance between the movable electrode 37 and the fixed electrode 36 becomes a predetermined gap, the supply of electric power to the electromagnetic repulsion coil 77 and the electromagnetic solenoid 88 is stopped, and the above-mentioned excitation is released.

For example, a capacitor storing charge may be used as a supply means of electric power from the control device 39 , and the stored charge may be discharged to eliminate the charge to de-excite.

As another method, the driving distance of the movable electrode 37 may be measured by a position sensor not shown, and after confirming that the driving distance exceeds a predetermined gap, the control device 39 may cut off the power supply and release the excitation. After this release, since the urging force of the open circuit spring 87 is greater than the sum of the self-closing force of the vacuum valve 2 and the attractive force of the permanent magnet 86, the contact of the vacuum valve 2 maintains an open circuit state.

[Effect]

The present embodiment as described above can obtain the following effects in addition to the same effects as those of the first embodiment.

(1) The electromagnetic repulsion driving device 71 is used as the driving device of the vacuum valve 2 . Therefore, the moving distance (stroke) of the movable electrode 37 required to cut off the current of the vacuum valve 2 is short, and the weight of the movable member is small, so high responsiveness can be obtained in the breaking operation, and the breaking time can be further shortened.

(2) As the electromagnetic repulsion driving device 71, it is provided with the repulsion ring 78 provided opposite to the electromagnetic repulsion coil 77, the repulsion ring receiving portion 79 supporting the repulsion ring 78 by the electromagnetic repulsion coil 77, the support portion 80 of the fixed electromagnetic repulsion coil 77 The high-speed breaking part 73 is formed. The electromagnetic repulsion driving device 71 that utilizes the electromagnetic repulsive force acting between the excited electromagnetic repulsion coil 77 and the repelling ring 78 to perform an opening operation has a higher driving force than a driving device that uses spring force and hydraulic pressure as a driving source. The rise is very fast and very high responsiveness can be obtained. Therefore, the SLF cut-off performance with sharp transient recovery voltage is excellent.

(3) The electromagnetic repulsion driving device 71 is provided with a thrust generating member for giving thrust to the movable electrode 37 of the vacuum valve 2 . Specifically, the movable shaft 76 is provided with a movable part 89 composed of a ferromagnetic body, a permanent magnet 86, an electromagnetic Solenoid 88. Thereby, the attraction force of the permanent magnet 86 and the attraction force of the excited electromagnetic solenoid 88 act on the movable part 89, so a thrust force is generated in a closed-circuit direction with respect to the movable part 89 and the movable shaft 76, and the driving force can be driven. The movable electrode 37 is brought into contact with the fixed electrode 36 .

[the third embodiment]

[structure]

A third embodiment will be described with reference to FIGS. 9 to 12 . 9 and 10 are cross-sectional views showing the overall structure of the composite switch 1 according to this embodiment, and FIG. 9 shows the input state, and FIG. 10 shows the disconnected state. Fig. 11 and Fig. 12 are partial enlarged cross-sectional views of the high withstand voltage switch 5 in Fig. 9 and Fig. 10 respectively.

The basic configuration of this embodiment is the same as that of the first embodiment. Therefore, only the points different from the first embodiment will be described, and the same reference numerals will be assigned to the same parts as the first embodiment, and detailed description will be omitted.

In this embodiment, an operation unit 101 and a power supply unit 102 are added to the composite switch 1 of the first embodiment. In addition, the fixed electrode 55 in the first embodiment is connected to the metal cover 23 . However, in this embodiment, electrodes corresponding to the fixed electrodes 55 in the first embodiment are configured movably and connected to the operation unit 101 . Therefore, this electrode is referred to as the movable electrode 105 hereinafter.

Hereinafter, the configuration of the high withstand voltage switch 5 in this embodiment will be described. First, the operation unit 101 has a driving device 103 and a control device 104 . The driving device 103 is connected to the metal cover 23 inside the pressure vessel 17 and is connected to the movable electrode 105 to drive the contact 4 freely in and out of contact.

The control device 104 is connected to the metal cover 23 on the outside of the pressure vessel 17 , and is connected to the drive device 103 via an insulated wire 106 penetrating through the metal cover 23 . The control device 104 controls the operation of the drive device 103 by adjusting the electric power supplied to the drive device 103 .

That is, the operation unit 101 can push and pull the movable electrode 105 in a straight line by applying a driving force to the mechanically connected movable electrode 105 , so that the movable electrode 105 can be brought into contact with, separated from, opened or closed with respect to the movable electrode 56 .

In addition, the operation of the operation unit 101 can be started, for example, when the control device 104 receives a command signal from a signal output device (not shown) provided outside the high withstand voltage switch 5 . In addition, the airtightness of the internal space 69 is maintained by a sealing portion having an elastomer gasket (not shown) in the hole of the metal cover 23 through which the insulated wire 106 passes in the pressure vessel 17 .

The power supply unit 102 is a power supply unit that supplies power to the operation unit 101 whose ground voltage is in a high voltage state without being grounded. The power supply unit 102 has a transformer 107 , a bus bar 108 , a pressure vessel 169 , and an insulating tube 170 . The transformer 107 and the pressure vessel 169 are fixed to the base 16 via a support structure 171 . The opening of the container of the transformer 107 is connected to one opening of the pressure container 169 . On the other hand, the other opening of the pressure vessel 169 is connected to the opening of the insulating tube 170 . The transformer 107, the pressure vessel 169, and the insulating tube 170 share an internal space 172, which is sealed and filled with an insulating medium. The filled insulating medium is the same as above. The primary side of transformer 107 is connected to bus bar 108 via insulated wire 109 . In addition, the secondary side of the transformer 107 is connected to the insulated wire 110 . The insulated electric wire 110 passes through the inner space 172 , passes through the end of the insulating tube 170 on the operation unit 101 side, and is connected to the control device 104 of the operation unit 101 . The transformer 107 and the insulating tube 170 through which the insulated electric wires 109 and 110 pass are provided with a sealing part having an elastomer gasket (not shown) to maintain the airtightness of the inner space 172 . The insulation resistance between the primary side and the secondary side of the transformer 107 and the insulation resistance between both ends of the insulating tube 170 are designed to be greater than the insulation resistance required between the pressure vessel 17 and the ground.

The bus bar 108 is connected to a power supply source not shown. The electric power supplied from the power supply source via the bus bar 108 is boosted by the transformer 107 to a voltage required to drive the operation unit 101 and supplied to the operation unit 101 .

[effect]

The operation of the present embodiment as described above will be divided into the input state and the cut-off operation, and will be described separately.

(input status)

First, when the composite switch 1 is in the ON state, the current introduced from the current-carrying plate 14 flows to the metal cover 12 , the driving device 38 , the movable electrode 37 , the fixed electrode 36 , the metal cover 13 , and the current-carrying plate 15 . In addition, the electric current is drawn from the current carrying plate 15 via the insulated wire 6 through the current carrying plate 24 , the metal cover 22 , the drive unit 57 , the movable electrode 56 , the movable electrode 105 , the drive unit 103 , and the metal cover 23 to the current supply plate 25 .

(cutting action)

On the other hand, when a command signal to cut off the current is given from the outside of the composite switch 1 , driving force is given to the movable electrodes 37 , 56 , 105 connected to the driving devices 38 , 57 , 103 . As a result, the movable electrode 37 is separated from the fixed electrode 36 in the vacuum switch 3 , and the movable electrode 56 and the movable electrode 105 are separated from each other in the high withstand voltage switch 5 , and current interruption starts. In this manner, the point that the movable electrode 56 and the movable electrode 105 of the contact 4 of the high withstand voltage switch 5 are separated from each other is different from the first embodiment in the breaking operation. Other functions are the same as those of the first embodiment.

[Effect]

The effects of the present embodiment as described above are as follows. That is, since the movable electrodes 56 and 105 of the contacts 4 constituting the high withstand voltage switch 5 have respective operation parts 20 and 101, the movable electrodes 56 and 105 can be simultaneously driven, thereby enabling the contacts 4 to be separated at high speed. . Thereby, the time required for ensuring the insulation distance can be shortened significantly.

In particular, compared with a conventional switch having a plurality of arc-blow-type contact portions, current interruption and insulation distance can be secured in a shorter time, so the interruption time can be shortened.

[the fourth embodiment]

[structure]

A fourth embodiment will be described with reference to FIG. 13 . In addition, FIG. 13 is a cross-sectional view of the high withstand voltage switch 5 of the composite switch 1 according to the present embodiment.

The basic configuration of this embodiment is the same as that of the first embodiment. Therefore, only the points different from the first embodiment will be described, and the same reference numerals will be assigned to the same parts as the first embodiment, and detailed description will be omitted.

In the composite switch 1 of the present embodiment, the support portion 111 is a member corresponding to the support portion 18 of the high withstand voltage switch 5 of the first embodiment. Like the support portion 18 of the first embodiment, the support portion 111 is provided between the base 16 on which the high withstand voltage switch 5 is fixed and the pressure vessel 17 in a high voltage state. The support portion 111 mechanically supports the pressure vessel 17 and ensures an insulating distance between the base 16 and the pressure vessel 17 .

More specifically, the support portion 111 has a large support insulator 112 , small support insulators 113 , 114 , an insulator connection portion 115 , a support structure 116 , and connecting metal fittings 117 , 118 . The large support insulator 112 and the small support insulators 113 and 114 are support beams in which metal parts at both ends are insulated by insulating insulators.

The insulator connection portion 115 is a metal block in which three connection portions to the support insulator are arranged in a Y shape. Y-shaped support insulator 119 is configured by connecting one ends of large support insulator 112 and small support insulators 113 , 114 to insulator connection portion 115 .

The supporting structure 116 is a metal pedestal, and is connected to the base 16 . The other end of the large support insulator 112 corresponding to the upright leg portion of the Y-shaped support insulator 119 is connected to the support structure 116 . The other ends of the small support insulators 113 and 114 corresponding to the wrist portions of the Y shape are connected to the metal covers 22 and 23 via connecting metal fittings 117 and 118 , respectively.

Thus, the support portion 111 supports the pressure vessel 17 in a structurally stable state. In addition, regarding the lengths of the large supporting insulator 112 and the small supporting insulators 113 and 114, assuming that the respective insulation resistances are A, B and C, A+B and A+C are designed to be between the pressure vessel 17 and the ground. above the insulation distance. In addition, B+C is designed to be greater than or equal to the insulation distance at both ends of the pressure vessel 17 .

[Effect]

The operation and effect of the present embodiment as described above will be described. First, as a premise, it is assumed that a pressure vessel with contacts is used in a high-voltage system for a type of switch that is not electrically grounded. Therefore, the potential difference between the pressure vessel and the ground may become larger than the potential difference between both ends of the pressure vessel, and a large support insulator with high dielectric strength is required. Since such support insulators are expensive, there is a demand to reduce the number of used ones as much as possible.

In this embodiment, a Y-shaped support insulator 119 including a large support insulator 112 , small support insulators 113 and 114 , and an insulator connection portion 115 is used for the support portion 111 of the high withstand voltage switch. Therefore, the number of used large support insulators can be reduced. The large support insulator 112 ensures most of the insulation endurance between the pressure vessel 17 and the ground, and the small support insulators 113, 114 ensure the insulation endurance at both ends of the pressure vessel. In this manner, by reducing the number of large support insulators used in one switch, the manufacturing cost of the switch can be suppressed.

[fifth embodiment]

[structure]

A fifth embodiment will be described with reference to FIG. 14 . In addition, FIG. 14 is a cross-sectional view of the high withstand voltage switch 5 of the composite switch 1 according to the present embodiment. The basic configuration of this embodiment is the same as that of the fourth embodiment. Therefore, only the points different from the fourth embodiment will be described, and the same reference numerals will be assigned to the same parts as the fourth embodiment, and detailed description will be omitted.

In the composite switch 1 of the present embodiment, the support portion 121 is a member corresponding to the support portion 111 of the high withstand voltage switch 5 of the fourth embodiment. Like the support portion 111 of the fourth embodiment, the support portion 121 is provided between the base 16 on which the high withstand voltage switch 5 is fixed and the pressure vessel 17 in a high voltage state. The support portion 121 mechanically supports the pressure vessel 17 and ensures an insulating distance between the base 16 and the pressure vessel 17 .

Furthermore, the support part 121 of this embodiment has the large support insulator 112, the small support insulators 113 and 114, the insulator connection plate 122, the support structure 116, and connection metal fittings 123 and 124. The large support insulator 112 and the small support insulators 113 and 114 are support beams in which metal parts at both ends are insulated by insulating insulators. The large support insulator 112 is longer in size than the small support insulators 113 , 114 .

The insulator connection plate 122 is a metal plate arranged in the horizontal direction. In this insulator connection plate 122 , two connection portions to the small support insulators 113 and 114 are arranged on the upper surface, and one connection portion to the large support insulator 112 is arranged on the lower surface. The upper end of the large support insulator 112 is connected to the lower surface of the insulator connection plate 122, and the lower ends of the small support insulators 113 and 114 are connected to the upper surface, forming a bifurcated support insulator 125.

The supporting structure 116 is a metal pedestal, and is connected to the base. The lower end of the large support insulator 112 corresponding to the leg portion of the bifurcated support insulator 125 is connected to the support structure 116 . The upper ends of the small support insulators 113 and 114 corresponding to the arms of the bifurcated support insulator 125 are connected to the metal covers 22 and 23 via connecting metal fittings 123 and 124 , respectively.

Thus, the support portion 121 supports the pressure vessel 17 in a structurally stable state. In addition, regarding the lengths of the large support insulator 112 and the small support insulators 113 and 114, assuming that the respective insulation resistances are A, B and C, then A+B and A+C are designed to be between the pressure vessel 17 and the ground. above the insulation distance. In addition, B+C is designed to be greater than or equal to the insulation distance at both ends of the pressure vessel 17 .

[Effect]

The effects of the present embodiment described above are as follows. First, in this embodiment, a bifurcated support insulator 125 including a large support insulator 112 , small support insulators 113 , 114 , and an insulator connecting plate 122 is used for the support portion 121 of the high withstand voltage switch. Thereby, similarly to the fourth embodiment, the number of used large support insulators can be reduced.

The large support insulator 112 ensures most of the insulation endurance between the pressure vessel 17 and the ground, and the small support insulators 113 , 114 ensure the insulation endurance at both ends of the pressure vessel 17 . Thereby, the number of large support insulators used for one switch can be reduced, and the production cost of the switch can be suppressed.

[sixth embodiment]

[structure]

A sixth embodiment will be described with reference to FIG. 15 . FIG. 15 is a cross-sectional view showing the overall structure of the composite switch 1 according to this embodiment. The basic configuration of this embodiment is the same as that of the first embodiment. Therefore, only the points different from the first embodiment will be described, and the same reference numerals will be assigned to the same parts as the first embodiment, and detailed description will be omitted.

The composite switch 1 of this embodiment does not have the insulated wire 6 connecting the vacuum switch 3 and the high withstand voltage switch 5 in the first embodiment, and the direction of the vacuum switch 3 is reversed left and right. Moreover, the operation part 10 of the vacuum switch 3 and the operation part 20 of the high pressure switch 5 are arrange|positioned facing each other.

In addition, the connection side of the metal cover 12 of the support part 8 and the connection side of the metal cover 22 of the support part 18 are unified into one common support part 131 . The common support portion 131 mechanically supports the pressure vessels 7 , 17 and ensures insulation distances between the base 16 and the pressure vessel 7 and between the base 16 and the pressure vessel 17 . Furthermore, the power supply units 11 and 21 are unified into one power supply unit 132 .

The shared support portion 131 has a support insulator 133 , a support structure 134 , and connecting metal fittings 34 , 53 , and 135 . The support structure 134 is a metal pedestal, and is connected to the base 16 . The support insulator 133 is a support beam insulated with insulating insulators at both ends of the metal portion, one end is connected to the support structure 134, and the other end is connected to the metal cover 12 via the connection metal parts 135, 34, and the connection metal parts 135, 53 are connected to the metal cover 12. Connected to the metal cover 22.

As described above, in this embodiment, the support insulator 30 and the support structure 32 of the support portion 8 in the first embodiment and the support insulator 50 and the support structure 52 of the support portion 18 are unified into a single support insulator 133 and support structure. The structures 134 are shared via the connecting metal fittings 135 .

As a result, the common support portion 131 supports one ends of the pressure vessels 7 and 17 in a structurally stable state. In addition, the length of the support insulator 133 is designed to be longer than the insulation distance of the pressure vessels 7 and 17 to the ground (support structure).

The power supply unit 132 has a transformer 136 , a bus bar 137 , a pressure vessel 173 , and an insulating tube 174 . The transformer 136 and the pressure vessel 173 are fixed to the base 16 via the support structure 175 . The opening of the container of the transformer 41 is connected to one opening of the pressure container 161 . On the other hand, the other opening of the pressure vessel 173 is connected to the opening of the insulating tube 174 . The transformer 136, the pressure vessel 173, and the insulating tube 174 share an internal space 176, which is airtight and filled with an insulating medium. The filled insulating medium is the same as above. The primary side of transformer 132 is connected to bus bar 137 via insulated wire 138 . In addition, the secondary side of the transformer 136 is connected to an insulated wire 139 . The insulated wire 139 passes through the inner space 176 , penetrates the upper end of the insulating tube 174 , and is connected to the control device 39 of the operation unit 10 and the control device 58 of the operation unit 20 , respectively. The transformer 136 and the insulating tube 174 through which the insulated electric wires 138 and 139 pass are provided with a sealing part having an elastomer gasket (not shown) to maintain the airtightness of the internal space 176 . The insulation resistance between the primary side and the secondary side of the transformer 136 and the insulation resistance between both ends of the insulating tube 174 are designed to be greater than the insulation resistance required between the pressure vessel 7 and the ground. The bus bar 137 is connected to a power supply source not shown.

The electric power supplied from the bus bar 137 is boosted by the transformer 136 to a voltage required to drive the operation parts 10 and 20 , and supplied to the operation parts 10 and 20 . In this way, the power supply unit 132 supplies electric power to the operation units 10 and 20 whose ground voltage is in a high voltage state without being grounded.

[Effect]

The effects of the present embodiment as described above are as follows. That is, compared with the first embodiment, the present embodiment can reduce the number of support parts and power supply parts, so that the manufacturing cost can be reduced.

More specifically, in this embodiment, the pressure vessels 7 and 17 are simultaneously supported by one common support portion 131 . That is, a plurality of shutters share the common support portion 131 . Thereby, the number of support insulators and support structures used in the support part of the composite switch 1 can be reduced, and the manufacturing cost can be reduced.

In addition, since the operation parts 10 and 20 connected to the metal covers 12 and 22 supported by the common support part 131 are at the same potential, electric power can be supplied by one power supply part 132 . That is, a plurality of switches share the power supply unit 132 . Thereby, the number of power supply units used in the composite switch 1 can be reduced, and the manufacturing cost can be reduced.

[the seventh embodiment]

[structure]

A seventh embodiment will be described with reference to FIG. 16 . In addition, FIG. 16 is a cross-sectional view of the high withstand voltage switch 5 of the composite switch 1 according to the present embodiment.

The basic configuration of this embodiment is the same as that of the first embodiment. Therefore, only the points different from the first embodiment will be described, and the same reference numerals will be assigned to the same parts as the first embodiment, and detailed description will be omitted.

The high withstand voltage switch 5 of the composite switch 1 of the present embodiment includes a power supply unit 141 as a power feeding member instead of the power supply unit 21 of the first embodiment. Furthermore, the support insulating tube 142 having a closed space inside is a member corresponding to the support insulator 49 of the first embodiment. An insulating medium is filled in the closed space of the supporting insulating tube 142 . As the insulating medium, the same ones as above can be used.

The power supply unit 141 includes a power supply coil 143 , a power reception coil 144 , a power supply coil support portion 145 , a power reception coil support portion 146 , a coil exciting device 147 , and a bus bar 148 .

The power supply coil 143 and the power reception coil 144 are coils for power supply and demand, and are vertically arranged on the same axis in the support insulating tube 142 . The power transmitting coil 143 and the power receiving coil 144 are spaced apart from each other by an insulation distance between them, and face each other. The power receiving coil 144 is connected to the control device 58 of the operation unit 20 via an insulated wire 149 .

The power feeding coil support portion 145 is a rod-shaped support member to which the power feeding coil 143 is fixed at one end. The other end of the power feeding coil support portion 145 is fixed to the support structure 51 side inside the support insulating tube 142 .

The power receiving coil support portion 146 is a rod-shaped support member to which the power receiving coil 144 is fixed at one end. The other end of the power receiving coil support portion 146 is fixed to the side of the pressure vessel 17 supporting the inside of the insulating tube 142 .

The coil excitation device 147 is fixed to the base 16 and connected to the power supply coil 143 via the insulated wire 151 . The bus bar 148 is connected to a power supply source (not shown), and is connected to the coil exciting device 147 via an insulated wire 150 .

The coil exciting device 147 excites the power supply coil 143 with the electric power supplied from the bus bar 148 to generate an induced current in the power receiving coil 144 , thereby supplying electric power to the operation unit 20 . Furthermore, the coil exciting device 147 controls the electric power supplied to the power transmitting coil 143 so that the induced current continues to flow in the power receiving coil 144 . That is, the power supply unit 141 supplies electric power to the operation unit 20 whose ground voltage is in a high voltage state without being grounded.

In addition, the insulated electric wires 149 and 151 penetrate the support insulating tube 142 , but each penetration portion is provided with a sealing portion having an elastomer gasket (not shown) to maintain the airtightness of the closed space.

[Effect]

The effects of the present embodiment as described above are as follows. That is, compared with the first embodiment, part of the power supply unit 141 can be downsized.

More specifically, the high withstand voltage switch 5 of the composite switch 1 uses the power supply unit 141 capable of supplying electric power at two separated points by electromagnetic induction. Accordingly, electric power can be supplied to the operation unit 20 whose ground voltage is in a high voltage state without grounding.

In addition, the power supply unit 141 can be downsized by accommodating the power supply coil 143 and the power reception coil 144 in the support insulating tube 142 filled with an insulating medium.

In addition, by using an insulating medium, effects such as improvement of power supply efficiency, prevention of misalignment between the two coils, and interruption of external environmental influences can be obtained because the distance between the power supply coil 143 and the power reception coil 144 can be shortened. .

[other embodiments]

In this specification, although several embodiment of this invention was described, the above-mentioned embodiment is shown as an example, and is not intended to limit the scope of invention. Specifically, embodiments in which all or any combination of the first to seventh embodiments are included are also included. The above embodiments can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. The above-described embodiments and modifications thereof are the same as those included in the scope and main content of the invention, and are included in the technical solutions described in the claims and their equivalents.

For example, the following forms are also included in the scope of the invention.

(1) In the first embodiment, during cutting, the movable electrodes 37 and 56 are simultaneously separated from the fixed electrodes 36 and 55 by the driving force of the operation parts 10 and 20 . In contrast, it is also possible to separate the movable electrode 37 of the vacuum valve 2 from the fixed electrode 36 to cut off the energizing current, and then separate the movable electrode 56 of the contact 4 from the fixed electrode 55 to ensure a gap between the two electrodes 55, 56. insulation distance.

(2) In the second embodiment, the movable portion 89 of the holding mechanism portion 75 is indirectly connected to the movable shaft 76 of the high-speed disconnection portion 73 via the wiper mechanism portion 74 . On the other hand, the movable portion 89 may be directly connected to the movable shaft 76 .

Explanation of reference signs

1…compound type switch

2…vacuum valve

2a...vacuum container

2b... bellows

3…vacuum switch

4… contacts

5…High pressure switch

6…Insulated wire

7, 17, 161, 165, 169, 173...pressure vessel

8, 18, 91, 111, 121...support part

9, 19... Contact part

10, 20, 101...Operation Department

11, 21, 102, 132, 141... Power supply unit

12, 13, 22, 23... metal cover

14, 15, 24, 25... energized board

16…Base

26, 45... insulator box

27, 46, 162, 166, 170, 174... insulating tube

28, 29, 47, 48... metal flange

30, 31, 49, 50, 133... support insulators

32, 33, 51, 52, 116, 134, 163, 167, 171, 175... supporting structures

34, 35, 53, 54, 117, 118, 123, 124, 135...connecting metal parts

36, 55...Fixed electrodes

37, 56, 105... Movable electrodes

38, 57, 103... drive device

39, 58, 104... control device

40, 43, 44, 59, 62, 63, 106, 109, 110, 138, 139, 149, 150, 151... insulated wire

41, 60, 107, 136...Transformers

42, 61, 108, 137, 148...busbar

65, 66, 67...Shields

68, 69, 164, 168, 172, 176...inner space

71…Electromagnetic repulsion driving device

72…mechanism box

73...High-speed disconnecting part

74... Wiper mechanism department

75…Maintaining Mechanism Department

76...movable shaft

77…Electromagnetic repulsion coil

78…repulsion ring

79…Repelling ring receiving part

80...supporting part

80a...hole

81...Flange

82…cup ring

83…Scraper spring

84...flange pressure plate

85, 90…shock absorber

86…Permanent magnet

87…open circuit spring

88…Electromagnetic solenoid

89…movable part

89a...legs

89b…two hands

89c…trunk

112...Large bearing insulators

113, 114... small support insulators

115...Insulator connection part

119...Y-shaped support insulators

122...Insulator connecting plate

125...two-fork support insulator

131...Total support part

142...support insulating tube

143...coil for power supply

144...Coil for power reception

145...Coil supporting part for power supply

146...Coil supporting part for power receiving

147...coil excitation device

Claims (10)

1. A kind of 1. compound shutter, it is characterised in that

   The compound shutter has at least two shutter being connected in series,

   At least one in the shutter is the vacuum shutter for having vacuum valve in contact portion,

   At least one in the shutter is that the high withstand voltage for the contact portion for having insulating strength bigger than the vacuum shutter is opened Close device,

   The high withstand voltage shutter and the vacuum shutter have：

   Closed container, filled with insulating properties medium and accommodate the contact portion；

   Support, while the closed container is supported, while carrying out the electric insulation of the closed container and ground plane；

   Operating portion, drive movable electrode possessed by the contact portion；And

   Power supply unit, to the operating portion supply electric power,

   The movable electrode equipotential of the contact portion of the operating portion of the high withstand voltage shutter with being connected the operating portion,

   The closed container has：

   The trunk portion of insulating properties, both ends open；And

   Metal cover, the opening of sealing both ends,

   The operating portion has：

   Drive device, driving force is given to the contact portion；And

   Control device, the action of the drive device is controlled,

   The drive device is connected to the metal cover in the closed container, and is connected with the contact portion,

   The control device is located at the outside of the closed container, and is connected to the power supply unit, to be supplied from the power supply unit To the electric power for driving the operating portion,

   Led in the drive device of the high withstand voltage shutter and the connecting portion use of the movable electrode of the contact portion Electric material.
2. 2. compound shutter according to claim 1, it is characterised in that

   The operating portion has：

   Coil；

   Coil fixed part, the fixed coil；

   Opposite good conductor, it is oppositely arranged with the coil；

   Movable axis, through the opposite good conductor, and it is fixed on the opposite good conductor；And

   Coil magnetization part, electric current is supplied to the coil, and excitation is carried out to the coil,

   By the caused repulsive force between the coil by the coil magnetization part excitation and the opposite good conductor, Give the movable axle thrust.
3. 3. compound shutter according to claim 1 or 2, it is characterised in that

   The support has：

   Support insulator, it is made up of two metal portion clampings as the insulator of insulant；And

   Supporting construction thing, the ground plane is fixed on,

   The support insulator is fixed between the supporting construction thing and the closed container, will both mechanicalness connections and electricity Insulation.
4. 4. compound shutter according to claim 3, it is characterised in that

   The support has connects into the Y-shaped that Y-shaped forms using insulator connecting portion by three support insulators Support insulator,

   The insulator connecting portion be with the three of the support insulator at connecting portion be configured to metal piece of Y-shaped,

   One end of three support insulators is individually fixed in the insulator connecting portion,

   The other end of a piece support insulator forms upright leg section by being fixed on the supporting construction thing,

   The other end of other two support insulators forms two wrists point by being connected to the closed container.
5. 5. compound shutter according to claim 3, it is characterised in that

   The support has two forked support insulators, and the two forked support insulator has insulator connecting plate and three institutes State support insulator,

   The insulator connecting plate is at upper surface two and is configured with lower surface one and is connected with the support insulator The metal plate of connecting portion,

   The two forked support insulator is connected by the way that one end of three support insulators is individually fixed in into the insulator The connecting portion of fishplate bar and form,

   A piece support insulator forms upright leg section by the way that the other end is fixed on into the supporting construction thing,

   Two support insulators form two upright wrists point by the way that the other end is connected into the closed container.
6. 6. compound shutter according to claim 1, it is characterised in that

   Two adjacent shutters share the support in the shutter.
7. 7. compound shutter according to claim 1, it is characterised in that

   Two adjacent shutters share the power supply unit in the shutter.
8. 8. compound shutter according to claim 1, it is characterised in that

   For the high withstand voltage shutter, a pair of movable electrodes that the contact portion has are connected to the respective operation Portion.
9. 9. compound shutter according to claim 1, it is characterised in that

   Uniformly formed in the power supply unit of the high withstand voltage shutter and the power supply unit of the vacuum shutter Power supply unit uses transformer and insulation tube.
10. 10. compound shutter according to claim 3, it is characterised in that

    The power supply unit has：

    Power supply source, being capable of supply electric power；

    Power supply coil, electrically connected with the power supply source；And

    Electrical coil, electrically connected with the control device of the operating portion,

    The insulator of the support insulator is hollow tubular body, and the internal metal portion by both ends is closed, and fills out Filled with the insulating properties medium,

    The power supply coil and electrical coil are configured in inside the support insulator with separating the amount of insulation distance On same axle,

    The institute of the ground plane side of the support insulator is fixed in the power supply with coil via power supply with coil supports portion State metal portion,

    The electrical coil is fixed on the closed container side of the support insulator via electrical coil support The metal portion.