JP3612201B2 - Vacuum circuit breaker with disconnector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vacuum circuit breaker with a disconnector.
[0002]
[Prior art]
FIG. 7 is a right side view showing an example of a gas insulated metal closed switchgear in which a disconnecting switch with a grounding device is housed together with a vacuum circuit breaker, and shows a case of a power receiving panel.
In FIG. 7, a door 23 a is provided at the front end of the box body 23 made of a steel plate so as to be freely opened and closed, and a door 23 b is also provided at the rear end of the box body 23. On the front side of the center of the box body 23, a partition wall 23c is provided vertically to partition the box body 23 in the front-rear direction, and on the rear side of the center of the box body 23, a partition wall 23f is also provided vertically.
[0003]
An L-shaped partition wall 23e is formed in an airtight manner on the upper side of the box body 23 with respect to the rear side of the front partition wall 23c, and the ceiling wall of the box body 23 is not shown above the partition wall 23e. In a plan view (not shown), a rectangular thick plate flange 23d is airtightly welded to the upper surface of the rectangular opening.
[0004]
As a result, the box body 23 forms a single load side disconnector chamber 41A between the partition wall 23c and the partition wall 23e, and a power source side disconnector chamber 41B shared with the vacuum circuit breaker between the partition walls 23c, 23e, and 23f. Is forming.
[0005]
Of these, an opening portion, which is omitted in detail, is formed in the upper portion of the central front partition 23c, and the disconnecting device 37A assembled to the mounting base projects the disconnecting portion into the load-side disconnecting device chamber 41A. The operating mechanism portion 37a of the disconnector 37A protrudes into an air-insulated low-pressure chamber formed on the front side of the partition wall 23c.
[0006]
At the upper end of the disconnecting portion of the disconnecting device 37A, a grounding disconnecting device 36A that is opened and closed by swinging in an arc shape with the lower end as an axis as shown by a broken line is shown. The broken line indicates the locus of operation when the blade of the disconnector 37A is turned on or when the blade is opened and the position when the blade is opened.
[0007]
At the lower end of the L-shaped partition wall 23e forming the gas chamber of the high-pressure portion of the disconnector 37A, an insulating spacer 40 with a conductor penetrating through the center is provided, and the terminal portion at the upper end of the insulating spacer 40 is It is connected to the lower terminal of the upper disconnector 37A via an L-shaped conductor.
[0008]
Below the disconnector 37A, a high-pressure vacuum circuit breaker 38 assembled to the mounting base is airtightly penetrated through an opening (not shown) formed in the partition wall 23c. An operation mechanism portion 38a on the front side of the high-pressure vacuum circuit breaker 38 is also provided in a low-pressure chamber on the left side of the partition wall 23c.
The upper terminal projecting from the rear upper part of the high-pressure vacuum circuit breaker 38 is connected to the terminal at the lower end of the insulating spacer 40 described above via an L-shaped conductor.
[0009]
An upper end of a conductor 42F disposed vertically below the lower terminal is connected to a lower terminal protruding from the lower rear side of the high-pressure vacuum circuit breaker 38. The conductor 42F is connected to the center of the box body 23. Up and down are supported by levers 39 fixed to a pair of support hardware (not shown) provided in the direction perpendicular to the paper surface.
[0010]
Below the high-pressure vacuum circuit breaker 38, a disconnector 37B identical to the upper disconnector 37A is provided symmetrically through the partition wall 23c.ThreeA grounding disconnector 36B, which is the same product as the upper grounding disconnector 36A, is also installed at the lower end of 7B upside down.
[0011]
The lower end of the conductor 42F described above is connected to the upper terminal of the disconnector 37B via a contact. On the other hand, the lower front end of a substantially J-shaped conductor 42E disposed vertically at the center of the box 23 slightly rearward is connected to the lower terminal of the disconnector 37B via a contact.
The conductor 42E is supported via an insulator 39 fixed to the front side of a pair of support hardware (not shown) provided in the direction perpendicular to the paper surface with respect to the top and bottom of the central portion of the box body 23.
[0012]
A voltage detector 45 is fixed to the rear side of the disconnector 37B via a support metal (not shown), and a terminal (not shown) protruding from the lower end of the voltage detector 45 is connected to the conductor 42F via a conductor 42G. ing.
[0013]
The flange 23d welded to the central portion of the ceiling plate of the box body 23 is formed with a circular opening (not shown) corresponding to three phases, and these openings are formed in the T shown in JP-A-60-160309. A T-shaped bushing 35 improved from the shaped bushing is hermetically penetrated through an O-ring (not shown).
[0014]
The T-shaped bushing 35 is formed in a flange of the box 23 through a mounting saddle (not shown) made of a mild steel plate having a substantially Ω-shape and a flange welded to the lower end, and a bolt inserted into the flange of the mounting saddle. It is airtightly fixed to 23d.
[0015]
A high-pressure cross-linked polyethylene cable (hereinafter referred to as a cable) 34 is connected to both ends of these T-shaped bushings 35, and an outer cover of these cables 34 is shown in a protective tube (not shown) or inserted inside the protective tube. Japanese Patent Application Laid-Open No. 60-160309 described above in detail with respect to the inner peripheral surface of a truncated cone-shaped cable receiving port (not shown) formed on both sides of the insulating layer of the T-shaped bushing 35 together with the pressing metal fitting and the stress cone. As shown in FIG. 8 of the gazette, it is pressed with a bolt and fixed in an airtight manner.
[0016]
The other end (not shown) of each cable 34 is connected to each T-shaped bushing penetrating through a ceiling plate of a power supply board (not shown) adjacent to the box body 23.
On the other hand, a cable head 33 is airtightly fixed to the back side of the upper end of the partition wall 23f provided vertically at the center rear side of the box body 23, and a terminal protruding from the left end of the cable head 33 has a conductor. The upper end of 42E is connected.
[0017]
A pair of through-type current transformers 44 are fixed to the partition wall 23 f below the cable head 33, and a cable support 43 is attached to the lower side of the current transformer 44. The cable support 43 and the current transformer 44 are penetrated by a power supply side cable 42 raised from a pit 47 provided on the installation floor of the box 23, and this cable 42 is attached to the lower part of the partition wall 23f. Supported by a cable support 43, the upper end is connected to the cable head 33.
[0018]
Operation mechanism part of disconnector 37A shown in FIG.ThreeThe insulators for three phases are fixed up and down on the rear surface of the disconnection part mounting base projecting airtightly at the rear part of 7a.
The front ends of the L-shaped connection conductors are fixed with bolts on the rear surfaces of these insulators, and a rectangular connection conductive plate is brazed to the center of the opposing surfaces of these connection conductors. Further, one side of the ground terminal bent at an obtuse angle is fixed to the upper connection conductor with a bolt.
[0019]
The lower connection guide plate supports the base ends of the pair of blades via a support shaft via a pressure spring (not shown). The tip of the blade is engaged with the upper connection guide plate in accordance with the backward operation of the insulating operation lever protruding rearward from the drive mechanism portion incorporated in the operation mechanism portion 37a and is in the input state.
[0020]
Above the disconnector mount, the bearing is the operating mechanism.ThreeIt protrudes behind 7a. The base end of the blade of the ground disconnector 36A is fixed to an insulating operation shaft that is provided so as to penetrate the bearing portion in a direction perpendicular to the paper surface.
[0021]
The lower disconnector 37B and the ground disconnector 36B are assembled upside down with the upper disconnector 37A and the ground disconnector 36A.
In the disconnector with grounding device configured in this way, the blades of the disconnectors 37A and 37B are supplied on condition that the vacuum circuit breaker 38 connected in series to the disconnectors 37A and 37B is open. Is also opened.
[0022]
In the gas-insulated metal closed switchgear configured as described above, sulfur hexafluoride gas (SF) is placed in the hermetic chamber between the partition wall 23c and the partition wall 23e and partition wall 23f on the right side.₆Gas) 46 is enclosed.
[0023]
Due to the insulating properties of the sulfur hexafluoride gas 46, the withstand voltage value between the box 23 and the grounding potential mounting metal disposed inside the box 23 and the main circuit charging unit such as the conductors 42E and 42F. The box 23 is also downsized by the high-voltage parts of the downsized grounding disconnectors 36A and 36B, so that the required installation area of the power receiving / transforming equipment and the like can be reduced. It meets user specifications required for gas insulated metal closed switchgear installed in a power receiving room with a limited area.
[0024]
[Problems to be solved by the invention]
However, even in the gas-insulated metal closed switchgear configured as described above, a large space is required in the vertical direction because the upper and lower ground disconnectors 36A and 36B and the disconnectors 37A and 37B are turned on and off. This is an obstacle to further downsizing the box body 23.
[0025]
That is, in FIG. 7, in order to obtain a predetermined insulating gap between the tip of the blade at the time of disconnection indicated by the chain line and the contact inserted by the tip of the blade, the opening angle θ of the blade must be increased. .
[0026]
Then, since the operation stroke and the swing angle of the insulating operation lever are also increased, not only the drive mechanism inside the operation mechanism portion 37a becomes large, but also the sealing structure of the base portion of the insulating operation lever becomes complicated.
[0027]
In addition, there is a method to reduce the stroke of the insulation operation lever by moving the connecting part between the tip of the insulation operation lever and the blade to the base end side of the blade, but this method does not increase the driving force of the insulation operation lever. Therefore, the drive mechanism of the operation mechanism section becomes large.
[0028]
Therefore, since the height of the box installed in the basement of the building cannot be reduced, it is impossible to prevent the workability of the cable connection work of the T-shaped bushing penetrating through the upper end of the box.
[0029]
On the other hand, as the land price of the city rises and the size of the building increases, there is an increasing demand for downsizing the large-capacity power receiving equipment installed in this large building. Further miniaturization is required.
Then, the objective of this invention is obtaining the vacuum circuit breaker with a disconnector which can reduce the restrictions of the installation place of a box.
[0030]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a vacuum circuit breaker with a disconnector having a movable side energizing shaft at a rear portion of a valve driving unit that drives a movable side energizing shaft of a vacuum valve and an operation mechanism unit that houses a pair of disconnector driving units. Insulating cylinders that house the vacuum valve are provided in the front, and disconnectors connected to the disconnector drive unit by insulating rods are provided above and below the insulating cylinders via shaft support parts.MountingCharacterized by
[0031]
Further, in the vacuum circuit breaker with disconnector of the invention corresponding to claim 2 in particular, the grounding terminal into which the blade of the disconnector is inserted by the front drive of the insulating rod by the disconnector driving part is provided above and below the rear part of the operation mechanism part. The main circuit terminal into which the blade of the disconnector is inserted by the rear drive of the insulating rod is provided at the rear of the disconnector.
[0032]
Further, in the vacuum circuit breaker with disconnector of the invention corresponding to claim 3 in particular, the main circuit terminal is fixed to the insulating cylinder, and the movable side contact that is fitted to the fixed side contact of the storage box is provided on the main circuit terminal. It is provided in the rear part.
[0033]
According to a fourth aspect of the present invention, there is provided a disconnector-equipped vacuum circuit breaker provided with a ground disconnector above the upper grounding terminal at the rear of the operation mechanism and below the lower grounding terminal. A connection conductor connected via a contact portion to a grounding blade that swings backward in the grounding operation of the contact terminal, and a rear end connected to the main circuit terminal, and a support that supports the connection conductor on the operation mechanism via an insulator, A movable contact that is fixed to the rear end of the connection conductor and connected to the fixed contact of the storage box, and a ground disconnector drive that is housed in the operation mechanism and drives the ground disconnector via an insulating rod. It is characterized by having.
[0034]
Moreover, the vacuum circuit breaker with a disconnector of the invention corresponding to claim 5 in particular includes a movable contact provided at the rear end of the insulating rod, and a fixed side fixed to the storage box body and fitted to the movable contact. A contactor is provided in the disconnector.
[0035]
Further, in the vacuum circuit breaker with disconnector of the invention corresponding to claim 6 in particular, the connecting conductor in which the movable-side energizing shaft passes through the contact portion on one side and the other side is connected to the shaft support portion of the disconnector is fixed to the insulating cylinder. It is characterized by that.
[0036]
According to a seventh aspect of the present invention, there is provided a vacuum circuit breaker with a disconnecting device, comprising: a valve driving unit that drives a movable side energizing shaft of a vacuum valve; an operating mechanism unit that houses a pair of disconnecting unit driving units; AxisToward the operation mechanismContains the vacuum valveAnd saidAfter the operation mechanismPartFixedRuA valve insulation tube;AboveUpper and lower of valve insulation cylinderPlaced inA movable contact connected to an insulating rod coupled to the disconnector drive unit via a movable energizing shaft;And saidFixed contact that mates with movable contactThe disconnector vacuum valve consisting ofAt the rear of the operating mechanismIt is attachedA disconnector insulating cylinder is provided.
[0037]
Further, in the vacuum circuit breaker with disconnector of the invention corresponding to claim 8 in particular, the movable side energizing shaft of the vacuum valve connects the other side of the connecting conductor penetrating one side and the fixed side of the one side disconnector valve. Connecting conductor, the second connecting conductor connecting the fixed side of the vacuum valve and the fixed side of the disconnector valve on the other side, and the movable side energizing shaft of the disconnector valve on one side and the other side penetrates one side and the other side And a third connection conductor having a movable contact portion fixed thereto.
[0038]
By such means, in the inventions of the first to eighth aspects, the blocking portion and the disconnecting portion are integrated with the unit together with the operation mechanism to reduce the size and facilitate the assembly, and to the box side. This reduces the time required for the operation and the space occupied by the box, and shortens the maintenance and inspection time.
[0039]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a vacuum circuit breaker with a disconnector of the present invention will be described with reference to the drawings.
FIG. 1 is a right side view showing a first embodiment of a vacuum circuit breaker with a disconnector according to the present invention, corresponding to FIG. 7 shown in the prior art, corresponding to claim 1 and claim 2, and a vacuum. Disconnectors connected to both sides of the valve indicate the open state.
[0040]
In FIG. 1, the point that is greatly different from FIG. 7 shown in the prior art is that a vacuum circuit breaker and a disconnector with a ground terminal connected to the power supply side and the load side of the vacuum circuit breaker are integrated together with each of these operation mechanisms. It is built in as a unit.
[0041]
That is, the operation mechanism 1A attached to the opening formed in the partition wall 23c vertically provided in front of the box body of the metal closed switchgear (not shown) is attached via the mounting plate 1a and the O-ring (not shown). The valve operation mechanism 1b, which omits the details of turning on and off the vacuum valve of the vacuum circuit breaker, and the disconnection operation mechanisms 1c, 1d for operating the disconnection parts incorporated as described below with respect to the upper and lower sides of the interrupting part are incorporated. ing.
[0042]
Disconnectors 9A and 9B for switching between the main circuit side and the ground side are incorporated in the insulating cylinder 2A that houses the three vacuum valves 3A as described below.
Among these, the insulating cylinder 2A is provided horizontally with respect to the central portion of the back surface of the mounting plate 1a of the operation mechanism portion 1A, and the mounting plate 1a is attached to six unillustrated metal buried in the front end of the insulating cylinder 2A. It is fixed with bolts that are screwed in from the front.
[0043]
A vacuum valve 3 is housed inside the insulating cylinder 2A, and the rear end of the fixed side energizing shaft of the vacuum valve 3 is housed and fixed in the rear part of the insulating cylinder 2A in FIG. It is fixed to the upper front.
[0044]
An L-shaped connecting conductor 12A is fixed to the upper part of the vacuum valve 3A, and the movable side conductive shaft 3a of the vacuum valve 3A passes through a contact ring (not shown) inserted into the connecting conductor 12A.
[0045]
The insulating rod 11A connected to the front end of the movable energizing shaft 3a passes through an annular seal case (not shown) inserted and fixed to the mounting plate 1a, and the front end is connected to a valve operating mechanism portion 1b driven by an electric motor. ing.
[0046]
An inverted T-shaped blade support 10A in the front view (not shown) is fixed to the rear of the upper surface of the connection conductor 12A, and the connection conductor is attached to the lower portion of the insulating cylinder 2A.13 AA blade support 10B, which is the same as the blade support 10A, is also fixed to the front end of the lower surface.
[0047]
The blade supports 10A and 10B are provided with a base end of a pair of blades 9a swingably through bolts and compression coil springs penetrating the blade supports 10A and 10B, with respect to an intermediate portion of the blade 9a. The rear ends of the insulating bars 8A and 8B are connected via a pin (not shown).
[0048]
On the other hand, on the back surface of the mounting plate 1a, a pair of supports 5A and 5B formed in an L shape on both the left and right sides in a plan view (not shown) are fixed, and a support shaft is provided between these supports 5A and 5B. 6A and 6B are penetrated in the direction orthogonal to the paper surface of FIG.
[0049]
The base ends of the levers 7A and 7B are fixed to the support shafts 6A and 6B at positions opposite to the blades 9a of the disconnectors 9A and 9B, respectively. The base ends of the rods 8A and 8B are connected. The tips of these insulating rods 8A and 8B are connected to the blades 9 of the disconnectors 9A and 9B.a'sIt is connected to the middle part.
[0050]
A base end of an operation lever (not shown) is fixed between the second phase and the third phase on the support shafts 6A, 6B, and one end of an operation rod 11B, 11C is connected to the tip of the operation lever. The other ends of the operating rods 11B and 11C are connected to the disconnector operating mechanisms 1c and 1d.
[0051]
A ground terminal block 4A is provided above each lever 7A and below each lever 7B, and is fixed to the mounting plate 1a. A blade 4a protrudes from the back side of each ground terminal block 4A.
[0052]
A bus-side terminal block 4B fixed to the front side of the upper bus bar and the lower bus bar is disposed above and below the rear ends of the disconnectors 9A and 9B. A set flange 2a having a lower end connected to the connection conductor 13A is fixed to the rear end surface of the insulating cylinder 2A.
[0053]
In the vacuum circuit breaker with disconnector configured as described above, by driving the operation mechanism 1b incorporated in the operation mechanism unit 1A, the insulating operation rod 11A is driven and the vacuum valve 3A is opened and closed.
Further, when the upper and lower disconnectors 9A and 9B are turned on and opened, the operation mechanisms 1c and 1d are driven, the operation rods 11B and 11C are driven, and the blade 9a is swung.
[0054]
In the vacuum breaker with disconnector configured as described above, the disconnectors 9A and 9B are fixed to the three-phase common insulating cylinder 2A, and the vacuum valve and the upper and lower parts are fixed to the common operation mechanism 1A. By incorporating the operation mechanism of the disconnector, the disconnector connected to both poles of this vacuum circuit breaker and the ground disconnector can be integrated into the mounting base 1a, and the outer shape including the disconnector can be integrated. Can be miniaturized.
[0055]
Accordingly, since the outer shape of the box can be greatly reduced as compared with the gas insulated metal closed switchgear of FIG. 7 shown in the prior art, it can be easily adapted to power receiving equipment of various specifications. In addition, since it can be integrated into the mounting base 1a as a unit, the assembly time can be greatly shortened, and the quality can be stabilized.
[0056]
FIG. 2 is a right side view showing a second embodiment of the vacuum circuit breaker with disconnector according to the present invention, corresponding to the other example of FIG. 1 shown in the first embodiment, and at both poles of the vacuum valve. The grounding disconnect switch is incorporated and connected as in FIG.
The difference is that the upper and lower disconnectors are symmetrically arranged at the positions before and after the vacuum valve, and the others are the same as in FIG.
[0057]
That is, on the upper surface of the insulating cylinder 2B, a blade support 10A that supports the base end of the blade 9a is fixed to the upper end of the connection conductor 14A at a position above the front end of the vacuum valve 3A. A blade support 10B is fixed to the lower surface of 14B.
[0058]
The connection conductor 14A, one side of which is connected to the movable side energizing shaft 3a of the vacuum valve 3A described above via a contact ring (not shown), is bent into a trapezoidal shape, and is similarly connected to the rear end of the fixed side energizing shaft of the vacuum valve 3A. The connection conductor 14B to which is connected has the same shape as the connection conductor 14A.
[0059]
The ground terminal block 4C fixed to the upper part of the back surface of the mounting plate 1a is lower in height than the ground terminal block 4A shown in FIG. 1, and the ground terminal block 4D fixed to the lower part of the back surface of the mounting plate 1a is On the contrary, it is getting longer.
[0060]
Similarly, the insulating rod 8C whose rear end is connected to the upper blade 9a is shorter than the insulating rod 8A shown in FIG. 1, and the insulating rod 8D connected to the lower blade 9b is longer. Therefore, the upper disconnector 9A is in front of the central part of the insulating cylinder 2B, and the lower disconnector 9B is in the rear of the central part.
[0061]
In the vacuum circuit breaker with disconnector configured in this way, not only can the electromagnetic force generated by the short-circuit current flowing in the connection conductors 14A and 14B be reduced, but depending on the restrictions on the arrangement of the equipment on the box side, By reversing the positions of the upper and lower disconnectors, it is possible to accommodate gas-insulated metal closed switch gears of various specifications.
[0062]
Next, FIG. 3 is a partially enlarged view showing a third embodiment of the vacuum circuit breaker with disconnector of the present invention, corresponding to FIG. 1 and FIG. 2 shown in the above-described embodiment, and corresponding to claim 3. It is a figure to do.
[0063]
3 differs from FIGS. 1 and 2 shown in the above-described embodiment in that the terminal block on the busbar side of the upper and lower disconnectors is integrated into the insulating cylinder, and the automatic connection structure is made together with the terminal block. It is.
[0064]
That is, the upper and lower sides of the insulating cylinder 2C manufactured slightly deeper than the insulating cylinders 2A and 2B shown in FIGS. 1 and 2 (note: the lower side is omitted, but symmetrical with the upper side). Insulation bases 15 are placed at positions behind the blades 9a, and bus-side terminal bases 4E are erected and fixed to the respective insulation bases 15.
The fixed-side blade 4a shown in the above-described embodiment is similarly attached to the front side of these bus-side terminal blocks 4E.
[0065]
Further, a contact 25A having an annular pressure spring (not shown) is provided on the back surface of the bus-side terminal block 4E, and on the front surface of the bus 16A having a lower end fixed to a support insulator 24 fixed to the box side. It faces and is fitted with the protruding busbar side terminal.
[0066]
In the vacuum circuit breaker with disconnector configured as described above, it can be connected to the bus bar 16A via a contactor at the time of assembly, so that the assembly, maintenance and inspection of the box body is further facilitated.
[0067]
FIG. 4 is a partially enlarged view showing a fourth embodiment of the vacuum circuit breaker with disconnector of the present invention, corresponding to FIGS. 1 to 3 shown in the above-described embodiment, and particularly corresponding to claim 5. It is.
In FIG. 4, the difference from the above-described embodiment is that the disconnecting portion is linearly driven by the disconnector configuration.
[0068]
That is, a terminal cylinder 19 constituting the disconnector 9C is inserted through the support conductor 18 standing on the upper surface of the insulating cylinder 2D in the front-rear direction through a contact plate (not shown). A plurality of contacts 19a are annularly arranged on the outer periphery, and one side is pressed against the outer peripheral surface of the terminal cylinder 19 by a close-contact coil spring (not shown).
[0069]
One end of the insulating rod 17 is inserted into the front end of the terminal cylinder 19, and the front end of the insulating rod 17 is connected to a disconnector operating mechanism.
A bus-side terminal 20 fixed to the front end of the bus bar 24 is disposed behind the terminal tube 19. A similar disconnector for turning on and off the other side of the vacuum valve is also attached to the lower side of the insulating cylinder 2D.
[0070]
In the vacuum circuit breaker with disconnector configured in this way, the height in the vertical direction is restricted according to the arrangement of the electrical equipment stored inside the box depending on the specifications on the box side, and the depth restriction By applying to a loose box, the mounting density of the box can be increased, and the installation floor area can be reduced.
[0071]
FIG. 5 is a right side enlarged view showing a fifth embodiment of the vacuum circuit breaker with disconnector according to the present invention, corresponding to claim 4 and corresponding to FIGS. The case where it is provided on both pole sides (that is, the busbar can be grounded) of the side disconnector is shown.
[0072]
That is, the support 21a of the grounding disconnector 21A for busbars is fixed to the upper part of the upper grounding terminal block 4A, and the support 21b of the grounding disconnector 21B for busbars is also provided below the lower grounding terminal block 4B. It is fixed. Insulating operation rods 11D and 11E for driving the ground disconnectors 21A and 21B are shown in front of the ground disconnectors 21A and 21B.
[0073]
On the other hand, a connection terminal block 29A is provided above the rear portion of the insulating cylinder 2A, and a lower end of an L-shaped connection conductor 28A is connected to the connection terminal block 29A, and an upper portion of the connection conductor 28A is It is fixed to the lower surface of the insulator 27.
[0074]
The lever 27 is attached to a common mounting plate whose upper end is provided in a direction perpendicular to the paper surface. The mounting plate is supported at both ends by a support 30A protruding forward from both sides of the mounting plate 1a.
[0075]
An intermediate portion of a connecting conductor 26A provided horizontally is fixed to the lower surface of the insulator 27, and the connecting conductor 26AThe rear end of the blade 27a is brazed to the front end.
A contact 25B is attached to the rear end of the connecting conductor 26A, and this contact 25B is fitted to the bus-side terminal on the front surface of the lower end of the bus 16A indicated by a two-dot chain line vertically provided inside the box. doing.
[0076]
On the other hand, a connection terminal block 29B is also provided below the rear portion of the insulating cylinder 2A, and the upper end of an L-shaped connection conductor 28B is connected to the connection terminal block 29B. The upper surface of the insulator 27 is fixed.
[0077]
An intermediate portion of a horizontally provided connection conductor 26B is fixed to the upper surface of the insulator 27, and the rear end of the blade 27a is brazed to the front end of the connection conductor 26B.
A contact 25B is attached to the rear end of the connection conductor 26B, and this contact 25B is fitted to a terminal on the front surface of the lower end of the bus 16B indicated by a two-dot chain line vertically provided inside the box. .
[0078]
In the vacuum circuit breaker with disconnector configured in this way, compared to the vacuum circuit breaker with disconnector shown in FIG. 1, the ground disconnectors 21A and 21B provided at the upper and lower ends and attached to these rears. Along with the contacts 25B and 25C, they are assembled as a unit in the mounting plate 1a.
[0079]
Therefore, the workability can be greatly improved as compared with the work of assembling inside the box, and therefore a vacuum circuit breaker with a disconnector having a constant quality with little variation can be obtained.
[0080]
FIG. 6 is a right side view showing a sixth embodiment of the vacuum circuit breaker with disconnector of the present invention, corresponding to claims 7 and 8, corresponding to FIGS. 1 to 5 shown in the above-described embodiment. It is a corresponding figure.
[0081]
In FIG. 6, the main difference from FIGS. 1 to 5 shown in the above-described embodiment is that an insulating cylinder is provided horizontally in the upper, middle, and lower stages with respect to the rear part of the operation mechanism part. As described above, a vacuum valve that houses a pair of electrodes is housed in the same manner as in the above-described embodiment, and disconnectors are housed in the upper and lower insulating cylinders as described below.
[0082]
That is, the front end of the insulating cylinder 2E is fixed to the central portion of the back surface of the mounting base 1a, and the insulating cylinder 2F is symmetrically arranged above and below the insulating cylinder 2E.Arranged,It is attached.
Among them, the central insulating cylinder 2E has a vacuum valve 3A as in the above-described embodiment.Make sure that the movable energizing shaft faces the operating mechanism.The L-shaped connecting conductor 12B is fixed in front of the vacuum valve 3A.
[0083]
Also in the upper and lower insulating cylinders 2F, a vacuum valve 3B serving as a container for the disconnector 9D is horizontally accommodated, and a movable energizing shaft 3b penetrating hermetically through a bellows (not shown) of the front end of the vacuum valve 3B is not shown. The contact conductor 12C is penetrated through the contact ring, and is connected to the insulating rod 11F.
[0084]
The front end of the insulating rod 11F is connected to disconnector operating mechanisms 1c and 1d (not shown) incorporated in the operating mechanism 1F.
A terminal cylinder 19 shown in FIG. 4 is brazed through the rear end of the movable energizing shaft 3b in the front-rear direction. In a groove formed on the outer periphery of the rear end of the terminal cylinder 19, a plurality of contacts 19 a are annularly arranged, and one side is pressed against the outer peripheral surface of the terminal cylinder 19 by a close-contact coil spring (not shown).
[0085]
A terminal 20 brazed to the front end of the fixed-side energizing shaft is disposed behind the terminal cylinder 19. Among these, the rear end of the fixed-side energizing shaft of the upper vacuum valve 3B is brazed to the rear end of the L-shaped connection conductor 13B fixed to the rear of the insulating cylinder 2F.
The front end of the connection conductor 13B is connected to the upper end of the connection conductor 12E fixed to the front of the vacuum valve 3A and connected to the upper end of the connection conductor 12B described above.
[0086]
The rear end of the fixed energizing shaft of the lower vacuum valve 3B passes through the set flange 2a, and the lower end of the connecting conductor 12D is connected to the rear end of the fixed energizing shaft. The upper end of the connecting conductor 12D is These are fixed to the set flange 2a of the central insulating cylinder 2E.
[0087]
The front end of the same contact 25A as shown in FIG. 3 is attached to the rear surface of the upper end of the upper connection conductor 12C, and the contact 25A is also attached to the rear surface of the lower end of the lower connection conductor 12C. ing.
[0088]
L-shaped busbars 24 are indicated by two-dot chain lines behind these contacts 25A, and the busbar-side terminals brazed to the front surface of the lower ends of these busbars 24 are connected to the contacts 25A. The rear part is fitted, and the upper and lower disconnectors 9D are connected to the bus bar 24 via the contact 25A.
[0089]
Also in the vacuum circuit breaker with disconnector configured in this way, as with the vacuum circuit breaker with disconnector shown in FIGS. The disconnector is attached to the mounting plate 1a of the common operation mechanism 1F.FixByIntegrated into the unitAssembling is easy and quality control is easy.
[0090]
Also, since the outer shape can be reduced by storing the disconnecting part of the disconnector in the vacuum valve, the vacuum interrupter with disconnector can be miniaturized. It is possible not only to ease the design, production and maintenance of the box, but also to install this box. The floor space required for the power receiving equipment can be reduced.
[0091]
Furthermore, the box can be miniaturized by the vacuum circuit breaker with disconnector without reducing the size by the hexafluoro gas employed as the gas insulating medium of the conventional gas insulated metal closed switchgear. It can be a vacuum circuit breaker with disconnector considering the environment such as contamination.
[0092]
【The invention's effect】
As described above, according to the invention corresponding to the first aspect, the movable side energizing shaft is disposed at the front of the valve drive unit that drives the movable side energizing shaft of the vacuum valve and the operation mechanism unit that houses the pair of disconnector drive units. Insulating cylinders that house the vacuum valve are provided, and disconnectors connected to the disconnector driving unit by insulating rods are provided above and below the insulating cylinders via the shaft support parts.MountingBy integrating the shut-off section and disconnecting section into the unit together with the operation mechanism, the unit is downsized to facilitate assembly, and the time required for assembly on the box side and the space occupied by the box body are reduced. Therefore, it is possible to obtain a vacuum circuit breaker with a disconnector that can reduce the restrictions on the installation location of the box.
[0093]
In particular, according to the invention corresponding to claim 2, the grounding terminals into which the blades of the disconnecting device are inserted by the front drive of the insulating rod by the disconnecting device driving portion are provided above and below the rear portion of the operating mechanism portion, and the rear of the insulating rod By providing the main circuit terminal to which the blade of the disconnector is driven by the drive at the rear of the disconnector, the interrupting part and the disconnecting part with the ground terminal are integrated into the unit together with the operation mechanism, and the size is reduced and the assembly is facilitated. Since the time required for assembling to the box body and the space occupied in the box body have been reduced, and the maintenance and inspection time has also been shortened, it is possible to obtain a vacuum circuit breaker with a disconnector that can reduce restrictions on the installation location of the box body. .
[0094]
According to the invention corresponding to claim 3 in particular, the main circuit terminal is fixed to the insulating cylinder, and the movable contact that fits to the fixed contact of the storage box is provided at the rear of the main circuit terminal. In addition, the shut-off part and disconnection part are integrated into the unit together with the operation mechanism, making it compact and easy to assemble, reducing the time required for assembly on the box side and the space occupied by the box, and shortening the maintenance and inspection time. Therefore, it is possible to obtain a vacuum circuit breaker with a disconnector that can reduce restrictions on the installation location of the box.
[0095]
According to the invention corresponding to claim 4 in particular, a grounding disconnector is provided above the grounding terminal on the upper side of the rear part of the operating mechanism and below the grounding terminal on the lower side, and the grounding operation of this grounding disconnector causes the rear A connecting conductor that is connected to the grounding blade swinging through the contact portion and whose rear end is connected to the main circuit terminal, a support that supports the connecting conductor on the operating mechanism via the lever, and a rear end of the connecting conductor It is cut off by providing a movable contact that is fixed to the fixed contact of the storage box and connected to the fixed contact of the storage box, and a ground disconnector drive unit that is stored in the operation mechanism unit and drives the ground disconnector via an insulating rod. The unit, disconnection unit and grounding disconnector are integrated into the unit together with the operation mechanism to reduce the size and facilitate assembly, reduce the time required for assembly on the box side and the space occupied by the box, and also provide maintenance and inspection time. Reduced restrictions on the installation location of the box because it was shortened It can be obtained disconnector with vacuum circuit breaker capable of Succoth.
[0096]
According to the invention corresponding to claim 5 in particular, the movable side contact provided at the rear end of the insulating rod, and the fixed side contact fixed to the storage box and fitted to the movable side contact are disconnected. As a result, the shut-off part and disconnecting part are integrated into the unit together with the operating mechanism, making it compact and facilitating assembly, reducing the time required for assembly on the box side and the space occupied by the box, and maintenance and inspection. Since the time has also been shortened, a vacuum circuit breaker with a disconnector that can reduce the restrictions on the installation location of the box can be obtained.
[0097]
Further, according to the invention corresponding to claim 6 in particular, the blocking portion is fixed by fixing the connecting conductor, which is connected to the shaft support portion of the disconnector on the other side of the movable side energizing shaft through the contact portion on one side, to the insulating cylinder. The unit is integrated into the unit together with the operating mechanism, making it smaller and easier to assemble, reducing the time required to assemble the box and the space occupied by the box, and shortening the maintenance and inspection time. It is possible to obtain a vacuum circuit breaker with a disconnector that can reduce restrictions on the place where the body is installed.
[0098]
According to the invention corresponding to claim 7, the valve drive unit that drives the movable side energizing shaft of the vacuum valve and the operation mechanism unit that houses the pair of disconnector drive units, and the movable side energized shaftToward the operation mechanismContains the vacuum valveAnd saidAfter the operation mechanismPartFixedRuA valve insulation tube;AboveUpper and lower of valve insulation cylinderPlaced inA movable contact connected to an insulating rod coupled to the disconnector drive unit via a movable energizing shaft;And saidFixed contact that mates with movable contactThe disconnector vacuum valve consisting ofAt the rear of the operating mechanismIt is attachedSince the disconnector insulation cylinder is provided, the disconnection part reduced in size by the breaker and disconnector valve is integrated into the unit together with the operating mechanism, making it smaller and easier to assemble, and the time required for assembly to the box side In addition, since the space occupied in the box is reduced and the maintenance and inspection time is also shortened, a vacuum circuit breaker with a disconnector that can reduce the restrictions on the installation location of the box can be obtained.
[0099]
Furthermore, according to the invention corresponding to claim 8 in particular, the first connection conductor connecting the other side of the connection conductor through which the movable side energizing shaft of the vacuum valve penetrates one side and the fixed side of the disconnector valve on one side; A second connecting conductor for connecting the fixed side of the vacuum valve and the fixed side of the disconnector valve on the other side, and the movable side energizing shaft of the disconnector valve on one side and the other side penetrates one side and the movable side contact part on the other side And a third connecting conductor to which the door is fixed so that the blocking portion and the disconnecting portion are integrated into the unit together with the operation mechanism to reduce the size and facilitate the assembly, and the time and box required for the assembly to the box side. Since the space occupied by the body is reduced and the maintenance / inspection time is also shortened, a vacuum circuit breaker with a disconnecting switch that can reduce restrictions on the installation location of the box can be obtained.
[Brief description of the drawings]
FIG. 1 is a right side view showing a first embodiment of a vacuum circuit breaker with disconnector according to the present invention.
FIG. 2 is a right side view showing a second embodiment of the vacuum circuit breaker with disconnector of the present invention.
FIG. 3 is a partial right side view showing a third embodiment of the vacuum circuit breaker with disconnector of the present invention.
FIG. 4 is a partial right side view showing a fourth embodiment of the vacuum circuit breaker with disconnector of the present invention.
FIG. 5 is a right side view showing a fifth embodiment of the vacuum circuit breaker with disconnector of the present invention.
FIG. 6 is a right side view showing a sixth embodiment of the vacuum circuit breaker with disconnector of the present invention.
FIG. 7 is a right side view showing an example of a conventional vacuum circuit breaker with a disconnector.
[Explanation of symbols]
1A, 1B, 1C, 1D, 1E, 1F ... operation mechanism, 1a ... mounting plate, 1b ... valve operation mechanism, 1c, 1d ... disconnector operation mechanism, 2A, 2B, 2C, 2D, 2E, 2F ... Insulating cylinder, 3A, 3B ... vacuum valve, 4A, 4C ... ground terminal block, 4B, 4D ... bus terminal block, 4a ... blade, 5A, 5B ... support, 6A, 6B ... support shaft, 7A, 7B ... lever, 8A , 8B, 8C, 8D, 17 ... Insulating rod, 9A, 9B, 9C, 9D ... Disconnector, 10A, 10B ... Blade support, 11A, 11D, 11E ... Insulating operating rod, 11B, 11C ... Operating rod, 12A, 12B , 13A, 14A, 14B ... connecting copper strip, 15 ... insulating base, 16A, 16B ... busbar, 18 ... support conductor, 19 ... terminal tube, 20 ... busbar side terminal, 21A, 21B ... ground disconnector, 22 ... support insulator 23 ... Box, 24 ... Bus, 5A ... contact, 26A, 26B ... connection conductor, 27 ... insulator, 28A, 28B ... connection conductor, 29A, 29B ... connection terminal block, 30A, 30B ... support.

Claims (8)

A valve drive unit that drives the movable energizing shaft of the vacuum valve and an operation mechanism unit that houses a pair of disconnector drive units, and the vacuum valve is fixed to the rear part of the operation mechanism unit with the movable side energized shaft forward. an insulating cylinder housing, disconnectors and disconnector with the vacuum circuit breaker having a coupled with an insulating rod to the disconnector drive unit kicked Installing via shaft support above and below the insulating cylinder. Grounding terminals are provided above and below the rear part of the operation mechanism unit to drive the disconnector blades when the insulating rod is driven forward by the disconnector driving unit, and the disconnector blades are inserted when the insulating rod is driven backward. The vacuum circuit breaker with disconnector according to claim 1, wherein a main circuit terminal to be operated is provided behind the disconnector. The disconnection according to claim 2, wherein the main circuit terminal is fixed to the insulating cylinder, and a movable contact that fits into a fixed contact of the storage box is provided at a rear portion of the main circuit terminal. Vacuum breaker with a device. A grounding disconnector is provided above and below the lower grounding terminal on the upper part of the rear part of the operation mechanism unit, and connected to the grounding blade that swings backward by the grounding operation of the grounding disconnector via the contact part. A connecting conductor whose rear end is connected to the main circuit terminal, a support that supports the connecting conductor on the operating mechanism via a lever, and a fixed-side contact of the storage box that is fixed to the rear end of the connecting conductor. 3. A vacuum interrupter with a disconnect switch according to claim 2, further comprising: a movable contact tool connected to the tool; and a ground disconnect switch drive unit that is housed in the operation mechanism unit and drives the ground disconnect switch through an insulating rod. vessel. 2. The disconnector includes a movable contact provided at a rear end of the insulating rod, and a fixed contact that is fixed to a storage box and is fitted to the movable contact. Vacuum breaker with disconnector as described in 1. 6. The connection conductor connected to the shaft supporting part of the disconnector on the other side is fixed to the insulating cylinder, and the other side is fixed to the insulating cylinder. Vacuum breaker with disconnector as described in 1. An operation mechanism unit that houses a valve drive unit that drives the movable energization shaft of the vacuum valve and a pair of disconnector drive units, and the vacuum valve is housed with the movable side energization shaft facing the operation mechanism unit side, and the operation a valve insulation cylinder that will be fixed to the edge at the back of the mechanism, the disposed above and below the valve insulation tube, movable contact which is connected via a movable current-carrying shaft in the insulating rod which is connected to the disconnector drive unit And a disconnector insulating tube that houses a disconnector vacuum valve comprising a movable contact and a fixed contact that is fitted to the movable contact, and is attached to a rear portion of the operation mechanism section. With vacuum circuit breaker. A first connection conductor connecting the other side of the connection conductor through which the movable side energizing shaft of the vacuum valve penetrates one side and a fixed side of the disconnector valve on one side; and the disconnection on the fixed side and the other side of the vacuum valve A second connecting conductor for connecting the stationary side of the valve, and a third connecting conductor in which the movable side energizing shaft of the disconnecting valve on one side and the other side penetrates one side and the movable side contact portion is fixed on the other side. The vacuum circuit breaker with a disconnector according to claim 7.

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