JPS60262319A - Disconnecting switch with grounding unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a disconnector having a grounding device used as one of power plants or substation equipment.

PRIOR TECHNOLOGY In general, disconnectors used in power plants or substations include horizontal two-point type, horizontal one-point type, vertical one-point type, V1, or pantagrano type, which are suitable for rational equipment in power plants and substations. The usage is [noted] so that it is structured.

In recent years, the practical performance of optical and substation equipment has improved, and the operation and operation of power generation and substation equipment has been rapidly automated and unmanned from the perspective of labor saving, and the maintenance cycle of equipment has been extended or no maintenance and inspections have been made. is being planned, and is it even changing? (The comprehensive automation system at the site is clearly defined, and in order to achieve both of these requirements, it is necessary to have a highly reliable installation system.)

From this point of view, it is necessary to avoid opening/closing operations of the disconnector and grounding device, which are part of power generation and substation equipment, for an extended period of time.

However, the 111 grounding device combined with the t-gara disconnector is installed with the current-carrying part and the mechanical part exposed outdoors. Dust may adhere and solidify, and lubricating oil coated on contact surfaces and sliding bearings may leak out and volatilize due to wind and rain, causing friction.
J, that is, the circulatory resistance increases.

In addition, if J3 is located in a snowy area, snow accumulation, etc. can interfere with the opening/closing operation of the disconnector and grounding device, and as a result, there are many cases where incomplete closing, incomplete contact, or the inability to open or close the circuit during cyclic operation. As described above, conventional disconnectors and grounding devices are easily affected by environmental conditions and have drawbacks in reliability in opening and closing operations. In addition, conventional disconnecting switches and grounding devices have large insulation dimensions due to air insulation, so they have to be large devices, and the grounding device is generally installed in the disconnecting switch. Disconnectors with equipment will become even larger and require more space to install.

Furthermore, in conventional disconnecting switches, the disconnecting switch and the grounding device are operated by independent operating mechanisms, so two operating mechanisms are required, resulting in a complicated structure and an increase in the size of the device. -1j, grounding 14ieff is full of track light! In order to ground/ground the charging current, it is necessary for the disconnector to open and the line to be grounded to be a non-energized bar.Where is the disconnector? It! ! During the '14 shift, (1) the disconnector is closed n;'r, the grounding device a
is a closed circuit Ogawa (2) When the 14Ji line is open, the earthing device can close the circuit (3) When the 16 earthing device line is closed, the disconnector cannot be closed.The above three conditions (1,) to (3) Phase n lock that satisfies A1! There was a problem in that four units were required and the structure was complicated.

Problems to be Solved by the Invention The present invention attempts to solve one of the problems existing in the prior art, which is that the structure is multiple mounting (the device is large and requires a large installation area). .

One Step for Solving the Problems The present invention solves the problems listed in item 1-1 by adding N'' to the frame.
One part, middle part and lower part of LL installation δ insulation support f E,
Upper contact on electrical circuit side, upper contact and ground side Jg J
ljl contacts are respectively arranged, and also the above-mentioned pre-insulation 1,
'In the middle part of the J body, connect the upper contactor'? - Electrically connected when i! ,: A movable contact rod common to the electric circuit side and the ground side is installed so as to be movable in the -1-- direction, and the movable contact rod is in a closed circuit state in which the movable contact rod is in contact with the upper contact; The operating mechanism is linked to alternately switch between an open circuit state in which the circuit is separated from the upper contact and a closed circuit state in which the circuit is in contact with the ground contact.

Operation The present invention adopts the means L, so that when the operating mechanism is actuated and the movable contact rod is moved upward from the open state, the upper end of the movable contact rod comes into contact with the two-part contact f on the electric circuit side. When the movable contact rod is moved downward by the operation mechanism while in this closed state, the movable contact rod is partially separated from the contact, and the electric circuit becomes open, and the movable contact rod is moved roughly. When the contact rod is moved downward, the threaded portion of the movable contact rod protrudes from the ground contact, thereby establishing a grounding closed circuit state.

Furthermore, when the movable contact rod is moved upward by the operating mechanism from the grounded closed circuit state, both the wire wire and the ground side become open circuited, and when the movable contact rod is further moved downward, the movable contact rod contacts and grips the upper contact. 4. This 3L
In this way, one operation mechanism opens and closes the electrical line side and opens the ground side.

Embodiment An embodiment in which the present invention is integrated will be described with reference to FIGS. 1 to 6 (a), (11>, and (c)).

As shown in Figure 1, the frame f? is erected and fixed on the foundation. 1.-'1 A disconnector 2 connected to the grounding device according to the present invention is installed and fixed so as to close the electric circuit for three phases for 9 hours. The three new one-minute circuit devices 2 and 2 are constructed in almost the same way, and as will be described later, they are opened and closed at the same time by a common operating mechanism. ing.

Next, centering on Figure 2, connect the disconnector 2 for one phase to C.
To explain, a rectangular box-shaped case 3 for a size control device is fixed to the top surface of the pedestal 1, and an opening [1 part 3a] is attached to the side of the case 3.
is formed and sealed with a lid 4. Said case 3
An upper insulator tube and a lower insulator tube 6 are erected and fixed in series on the upper surface, and a mounting ring 7, which is fitted and fixed to the outer periphery of the F end of the lower insulator tube 6, is fixed to the upper surface of the case 3 using bolts 8. It is fixed to the case 3 by the tongue. Further, a mounting ring 9 is fitted and fixed to the outer circumference of the lower end of the I part insulator tube 5, and an upper terminal plate 10 to which an electric wire is connected is mounted on the upper surface of the ring 9.
is identified by the bolt 11. moreover,
Attachment rings 12.13 are fitted to the lower end outer periphery of the upper insulator tube 5 and the lower end outer periphery of the lower insulator tube 6, respectively, and between the two attachment rings 12.13 is a lower terminal plate 14 for connecting electric wires. Both mounting rings 12, 13 and the lower terminal plate 14 are interposed and fixed to the U by bolts 15.

Boss portion 10a integrally formed on the lower surface of the upper terminal board 10
The conductor 16 has a vertically cylindrical shape, and the upper end of the conductor 16 is screwed into the lower end threaded portion 16a of the conductor 16, as shown in FIG. , the mounting tube 17
A large number of contact pieces 18a constituting a ring-shaped upper contact 18 are annularly engaged with the engagement protrusion 17a formed on the outer periphery of the F end of the ring, and are attached in the diametrical direction by a pair of springs 19. It is strongly held. The bottom plate 17 of the tray 1 cylinder 17
An upper auxiliary contact 20 made of L97[i material is screwed into the upper auxiliary contact 20 on the upper auxiliary contact 6 and fixed to the oak 1 by 21. The conductor 16
A support ring 22 is screwed onto the threaded portion 16a of the support ring 22, and the upper end of a shield tube 23 is fitted and fixed to the outer peripheral surface of the ring 22, so as to alleviate the electric field concentration generated in the two-part contact 18. It has become.

On the other hand, a passage 14a is opened in the center of the lower terminal plate 14 as shown in FIG. There is. A ring-shaped lower contact 26 is attached to the IL protrusion 24b formed on the outer periphery of the upper end of the cylinder 24 by a ring-shaped spring 27 in a manner similar to the above-mentioned upper contact 18. Said mounting cylinder 2/It and 1; part contactor 2
6 has a movable contact rod 28 common to the electric circuit side and the ground side.
-It is threaded 1!1 so that it can slide in the downward R direction. As shown in FIG. 3(a), stoppers 29 and 30 are fitted and fixed on the inner circumferential surface of the upper end of the movable contact rod 28 at two locations, upper and lower. The contact 31 has a spring receiver 32 at the lower end.
is fixed between the spring receiver 32 and the stopper 30.
．． = The coil spring 33 biases the lead h to the right side μ. 5<a> at the lower end of the movable contact rod 28.
As shown in FIG. 3, the upper end of the insulating rod 34 is inserted and connected by a connecting pin 35. The insulating rod 34 is connected to a passage 3b transparently provided on the upper surface of the case 3, as shown in FIG.
It is supported through the case 3 so as to be slidable in the vertical direction and guided into the case 3. A lever 37 is attached to a rotating shaft 36 which is supported horizontally and externally with respect to the case 3, and a long hole 37a is formed at the tip of the lever 37.
When the pin 38 attached to the lower end of the insulating rod 34 is engaged and the lever 37 is rotated, the movable contact rod 28 is reciprocated in the vertical direction via the insulating rod 34. That's what I do.

As shown in FIG. 5(a), a cylindrical upper ground contact 39 made of arc-resistant metal is screwed and fixed to the outer periphery of the lower end of the movable contact rod 28, and the inner periphery of the ground contact 39 ( Contains fixed cylindrical protective tube/10 or 11). As shown in Figure 4-
A movable contact rod 28-1 is mounted on the upper surface of the 7-ring portion 2/la of 24.
Seal to alleviate electric field concentration at the edge +:1:'1)/
A shield L) is fixed upright using bolts 25, and is placed on the lower surface of the bottom end of the ground contact 39 to alleviate electric field concentration at the tip of the ground contact 39. 12
Similarly, a vertically elongated cylindrical 1.7 Hl earthing pipe/13 is fixed in an upright position with bolts 44 on the surface of case 3 as shown in Fig. 2. The upper end of the grounding pipe 43 has two pipes as shown in FIG. l, J, sea urchin mounting tube/l! :) is screwed and fixed,
[Protrusion 45a formed at one end of the f4 strip 40]
As mentioned above, the ring-shaped toe contact r-46 is connected to the
Arrived at 3A. In addition, a support ring II8/+S is screwed onto the outer periphery of the grounding pipe/I3, and the ring 4B is provided with a support ring II8/+S that is used to alleviate the electric field concentration caused by the lower grounding 1. 'Z>/j"0 The shield cylinder 49 is removed (=J 1.-J is removed.

Disconnector 2 having three grounding devices configured in this way
As shown in FIG. 1, an intermediate shaft 51,51 is connected between the rotating shafts 36 and 36 of 2 and 36 through a joint 50. 52 /] Operation extended upward from the eyes l1ilI153
A drive bevel gear 54 is fixed to the top end of the top 7.
! A driven bevel gear 55 attached to the outer end of the rotating shaft 36 is meshed with the rotating shaft 54 .

Then, when the operation @53 is rotated, the disconnector 2 for three phases is turned.
2 to 2 are opened and closed at the same time.

However, in this embodiment, the inside of the case 3, the upper insulator tube 5, and the top insulator tube 6 are sealed, and an insulating gas such as sulfur hexafluoride (S F 6 ) gas is filled in this sealed space. has been done.

Inside the operation box 52 (1, although not shown, there is an operation axis 5
To set the attachment of the three movable parts fl128 when the electric circuit side becomes a closed circuit state, when the electric circuit side becomes an open circuit state, and when the ground side becomes a closed circuit state during the rotation of the rotor rotating L-3. , during the rotation of the seventh motor, a limit switch is made so that the first switch is stopped.Next, the above-mentioned The operation of the disconnector connected to the grounding device constructed as above will be explained.

2 and 5 (a), the movable contact rod 28 is also in contact with both the contactor 18 and the soil ground contact f/IO. and ground side)
゛In the δ state (15, rotation @go 36 causes 1 tube - 3
7 is the co-moving δ rod insulator 34 is moved upward, j
'iJ moving contact moved in 8 directions between the moving contact rods, moving contact 4+
2. One end of E3 is fitted into contact with the probe 18 as shown in FIG. 6 (11). At this time, before one end of the movable contact rod 28 comes into contact with the upper contact 18, the lower auxiliary contact 31 comes into contact with the lower auxiliary contact 20 as shown in FIG. Auxiliary contacts at the top and bottom? An electric path is formed at 131118 to prevent an arc from flying between the upper contact 18 and the movable contact rod 28 and melting the contact surface.

When Δ゛i is in the state of the r'J+ path on this circuit side, the current flows through the lower terminal plate 1/l- = Take A. Tube 17 → Conductor 1
6 to the upper terminal plate 10.

As shown in FIG. 6(b), when the lever 37 is rotated in the direction 81 in the figure by rotation @36 in the closed state on the electric circuit side, the movable contact rod 28 moves from the upper contact 18 to the third
As shown in Figure (b), the electric circuit is connected to the movable contact rod 28 =1
Part of the contact 18 is transferred to the lower auxiliary contact 31 and the lower auxiliary contact 20, and then the lower auxiliary contact 31 is separated from and covers the upper auxiliary contact 20. At this time, the lower auxiliary contact 31
Although an arc occurs to interrupt the current between the upper auxiliary contact 20 and the upper auxiliary contact 20, the contact surface between the movable contact rod 28 and the upper contact 18 is not melted and damaged as shown in Fig. 6 (l). road condition.

Further, when the lever 37 is rotated in the same direction, the movable contact rod 28 moves as shown in FIG. 6(C).
6 and the ground side is in a closed circuit state. At this time,
Although an arc flies between the lower ground contact 46 and the lower ground contact 39, the protection tube 40 prevents the insulating rad 34 from being burnt out due to this arc.

In this closed circuit state on the ground side, the charging current of the line is as follows: ``Lower terminal plate 14 -'' Skull tube 24 -> Lower contact 26 -> Movable contact rod 28 - -> Upper ground contact 39 -> Lower ground contact 46
→ Transfer tube 45 → Ground pipe 43 → Case 3-1 Flows to the earth via the frame 1.

Now, in the embodiment of the present invention, the rotating shaft 36, the lever 3
7 and an insulating [] TRADO 4, the movable contact rod 28 can be moved up and down to connect to the upper contact 18!
The IIJ contact rod 28 is in contact and the circuit side is closed /j state, and the movable contact rod 28 is in the h'-r; intermediate position 16.
), both the electrical circuit side and the ground side are open circuited.1. The movable contact rod 28 is in contact with the lower ground contact 46 and the ground side is closed. The structure can be extremely simplified by eliminating the need for mutual locking devices on the side [on], "off", and the ground side [on], and the number of operating mechanisms can be reduced by one! :・The structure can be simplified, and therefore the entire device can be downsized and the area of the 4 parts can be significantly reduced.

In addition, in the embodiment of the present invention, the disconnector 2 is used to connect the 1-upper bus bar as shown in FIG. 7, or the breaker 56 and the lower terminal board 14 are connected as shown in FIG. The scope of application can be expanded, such as cases where a grounding device is not required, or cases where a grounding device in which the upper terminal board 10 and the circuit breaker 56 are connected as shown in FIG. 9 is required.

In addition, in the embodiment of the present invention, the inside of the case 3, Dobe insulator tube 5, and lower insulator tube 6 are sealed, and sulfur hexafluoride gas is sealed in the sealed space. It prevents snow accumulation, dust adhesion, lubricant oil leakage, etc., and improves the reliability of opening and closing operations regardless of environmental conditions.
- can.

Note that the present invention is not limited to the above embodiments,
For example, the present invention can be embodied in an embodiment as shown in FIG.

As shown in FIG. 10, the lower terminal plate 14 and the movable contact rod 2
8 etc. are connected by the flexible conductor 57, and in 1), the operating lever 58 moves the movable contact rod 28 to the 11 backward movement i in the downward direction.
The actuating lever 58'M is constructed to be capable of rotating (rotatingly operated at the outer part of 3) (2 and 3).

Effects of the Invention A1 As described in detail above and as shown in the IC, the present invention completely integrates the disconnector and the grounding device, thereby eliminating the need for mutual locking devices and reducing the number of operating mechanisms by one. This has the effect of simplifying the process, making the device more compact, reducing installation space, and diversifying usage patterns.

[Brief explanation of drawings]

Figure 1 shows an embodiment of a disconnector having a grounding device according to the present invention. Figure 2 is an enlarged vertical cross-sectional view of the central part of one set of disconnectors. a) is the upper contactor and
FIG. 3(b) is an enlarged cross-sectional view of the contact rod in the closed circuit state, and FIG. Figure 3 (C,
) is an enlarged view of the closed circuit state (I), Fig. 4 is an enlarged cross-sectional view of the area near the moving contact rod (II), and Fig. 5 (a) is an enlarged cross-sectional view of the movable contact rod and the ground contact in a non-contact state. , Figure 5 (
b>, t;L are also enlarged cross-sectional views of the ground contact state, and Figures 6 (a) to (C) are road body cross-sectional views for explaining the operating states, respectively, and Figures 7 and 9. 10 is a front view showing how the disconnector of the present invention is used, and FIG. 10 is a sectional view showing another example of the present invention. Disconnector, 3
...Case, 5... Dobe Inkan, 6... Dobe Inkan,
10..." lower terminal board, 1/I... lower end, daughter board,
16...Conductor, -1,7°24', '45...Mounting tube, 18...Upper contact, 26...F section 14 contact
, 28... Movable contact rod, 34... Insulating rod, 36
... Rotating shaft, 37... 1 collar - 13... Upper ground contact, 43... Ground tube, 46... Lower ground contact, 52... Operation box, 53 Operation axis. Special I [Applicant Part 1 Part A Corporation Agent Patent Attorney 1) Hironobu Figure 3 (a) (b) (C) 11°871

Claims (1)

[Claims] 1. 11 parts of the insulating support,
The middle part and the 6th part (62 are the 1 part contacts, the lower contacts 1' and 1 on the electric circuit side, and the ground contact r on the ground side, respectively,
Similarly, the lower contact ((,
X Normally 11 Move the movable contact rod on both the electrically connected circuit side and the ground side in the 1-1 direction. )+possibly equipped, and before i, lj ! For 'I moving contact,' the movable contact rod is in contact with the front iIF, knee 1 contact 1', ■1 road state, lower contact -r or L~, li! I1 is in an open circuit state and the ground contact is in contact with 71.
A disconnector having a grounding device characterized in that the operating mechanism of the switch is connected to the grounding device. 2. A part of the insulating support and a lower insulating tube are installed in series on the mount via an operation mechanism case, and inside these cases and the V7 tube are the lower contactor, 1
・The partial contact, the ground contact, the movable contact rod, and the operating device (1) are airtightly housed together with an insulating gas such as hexanosulfur gas, etc. A disconnector that connects the grounding device. 3. Several lower terminal plates are installed at one end of the upper insulator tube.
A ring-shaped lower contact is attached to the inner surface of the terminal plate via a cylindrical conductor, and a lower terminal plate is clamped and fixed between the upper and lower insulator tubes. Through the tube 1
A ring-shaped lower contact is supported by the ring, and a cylindrical IIL movable contact rod is fitted into the lower contact so as to be slidable in the vertical direction. ) is one step higher,
A ring-shaped ground contact is fixed to the -L end of the ground pipe via a mounting tube, and the ground pipe and ground contact are inserted through the bottom end of the movable contact rod from inside the case. A disconnector having a grounding device according to claim 2, wherein one end of the operating mechanism extending upward is connected to the insulation. 4. A new circuit device having a grounding device according to claim 3, wherein the tip of a lever rotated by a rotating shaft within the case is articulated at the lower end of the insulating rod.