JPS62290025A - Breaker - 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 3. Detailed Description of the Invention Object of the Invention (Field of Industrial Application) The present invention relates to a disconnector used as one of power plant or substation equipment.

(Conventional technology) In recent years, due to the increase in the amount of electric power equipment, comprehensive automation of equipment, and social demands for a stable supply of electric power, reducing equipment failures and accidents has become an important issue in equipment operation and maintenance. It has become one.

Among them, disconnectors are often installed.For example, in the air-open type disconnector 55 shown in Fig. 5, the conductive parts and mechanical parts are exposed to the air, so the lubricating oil application part is particularly susceptible to dust. The lubricating oil may leak out or evaporate due to wind and rain, increasing friction or sliding resistance, and as a result, the disconnector may close or close.
There were many problems with incomplete closing, incomplete contact, or inability to turn on and off during the cutting operation.

A method for solving this problem is C, a closed type disconnector 56 in which the conductive part and the ms part are housed in a sealed container made of insulator pipe as shown in Fig. 6, and a disconnector with a grounding device as shown in Fig. 7. 50 has been proposed (Japanese Unexamined Patent Publication No. 60-262319). To explain this disconnector with a grounding device, as shown in FIG. 7, an upper contact 51 on the electrical circuit side, a lower contact 52 and A grounding contact 53 on the grounding side is arranged respectively, and a movable contact rod 54 common to the transmission side and the grounding side, which is electrically connected to the lower contact at all times, is arranged in the middle part of the insulating support in the vertical direction. The movable contact rod 54 is movably installed, and has a closed circuit state in which the movable contact rod 54 is in contact with the upper contact 51, an open circuit state in which it is separated from the upper contact 51, and an installed closed circuit state in which it is in contact with a ground contact. It has a structure in which operating mechanisms for alternately switching between states are linked.

(Problems to be Solved by the Invention) The conventional closed-type disconnect switch shown in FIG. However, since it is common to install a disconnect switch with a grounding device for power transmission lines (for railway lines), there is a problem that it cannot be used for such purposes.

Furthermore, in the case of a disconnector with a grounding device as shown in FIG. 7, the grounding contact is located at the bottom, so the connection wiring 59 for connecting the power transmission line is extended downward as shown in FIG. become.

In this case, as wind, earthquakes, etc. may touch the lead-in overhead wires, it is necessary to close them to the upper current-carrying part when the disconnect switch is off, and to remove the wires from a sufficient distance to avoid problems with insulation. , also a disconnector and il! The connecting wires between the disconnectors are connected from top to bottom, and the connecting wires are not neat and tidy, and even though the circuit breaker has been downsized, the site of the power plant and substation is significantly larger due to the connecting wires. The problem is that it does not actually decrease.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a line-side insulator tube that is substantially perpendicular to the main container, and is substantially perpendicular to the insulator tube, forming an L-shape as a whole. A busbar-side insulator tube is provided as shown in the figure, and the line-side conductor and busbar-side conductor are guided through the insulator tube from the terminal provided at the tip of each into the main container, so that the inner ends of both conductors can be electrically connected and disconnected, and the line A configuration is adopted in which a movable contact rod is provided that is operated to reciprocate in the same direction as the busbar side insulator tube so that the side conductor can be grounded to the main container, and the operating part thereof is provided on the side of the main container.

(Function) Since this invention adopts the above structure, the complexity of connecting wires in power plants, substations, etc. is eliminated, and the site of power plants, substations, etc. is significantly reduced due to the reduction of disconnectors. This prevents lubricating oil from leaking and dust from attaching.
The performance of the disconnector is maintained well for a long period of time.

(Embodiment) An embodiment embodying the present invention will be described below with reference to FIGS. 1 to 4.

As shown in FIG. 2, reference numeral 1 denotes a pedestal erected at predetermined intervals in the premises of a power plant or substation, and on the pedestal 1 is a disconnector 2 of the present invention (in this embodiment, Since it is a closed type, a closed type disconnector (hereinafter referred to as a closed type disconnector) is fixed. A bus bar 5 is connected to the side end of the sealed disconnector 2,
A lead-in overhead wire 4 pulled down from the line-side power transmission line 3 is connected to the upper end.

Next, the sealed disconnector 2 will be described. As shown in FIG. 1, 6 is a cubical sealed main body container, and is installed on the pedestal 1 via leg portions 6A. It should be noted that an insulating gas such as hexafluorofluoric sulfur (SF6) is sealed in the main body sealed container 6 and the portion communicating therewith. Reference numeral 13 denotes a bus bar side insulator tube that is fixed to the side end surface of the main body closed container 6 and extends laterally, the tip of which is sealed, and a side connection terminal 8 is provided. 12 is also the main body sealed container 6
The line side insulator tube is fixed to the upper surface of the line side insulator, the upper end of which is sealed, and an upper connection terminal 7 is provided.

As shown in FIG. 3, 17Δ is a support tube fixed on an insulating support member 16A fixed to the bottom surface of the main sealed container 6, and the bus bar side conductor 15 is supported at one end by the connection terminal 8.
The inner end is inserted and supported.

11A is a first fixed contact whose base end is supported by a coil spring 23 on the inner end of the bus bar side conductor 15;
19A is a shield tube that covers the first fixed contact 11A. 17B is a support member fixed on the insulating support member 16B which is also fixed to the bottom surface of the main sealed container 6, and has a horizontal sliding support hole 18A and a vertical support hole 18B formed above it. There is. Reference numeral 14 denotes a line side conductor whose one end is supported by the upper contact terminal 7 section, and whose lower end is inserted and supported in the support hole 18B of the support member 17B. 32 is the lower end of the line side conductor 14 and the support member 17
A second fixed contact is supported by a coil spring 23 between the upper portions of B, and its outer side is covered with a shield 1119c. 11B is the support member 17B
A third fixed contact is supported by a coil spring 23 with a tightening force C on the outer periphery of the sliding support hole 18.

Reference numeral 9 denotes a ground contact which is supported by a coil spring 23 in a tightening manner against the outer periphery of the tip of the support tube 33 fixed to the inside of the main body sealed container 6 on the opposite side to the bus bar side insulator tube 13, and the outer side thereof is supported by a coil spring 23. It is covered with a shield tube 19D.

Reference numeral 24 denotes a movable contact rod which is attached to the sliding support hole 18A of the support member 17B so as to be able to move left and right.
Third double constant contact 11A.

11B are electrically connected, and when the third fixed contact 11B and the ground contact 9 are moved to the left, the base end contacts the ground contact 9, and the third fixed contact 11B and the ground contact 9 are electrically connected. Reference numeral 34 denotes an insulating rod connected to the base end of the movable contact rod 24, which extends through the support cylinder 33 and into the operating section 45 described later, and has a guide pin 34a at the tip thereof, which is perpendicular to the axial direction. It is installed protruding in the direction.

Reference numeral 41a denotes a guide groove formed in a guide member 41 fixed to an operation box 45A, which will be described later.
a is engaged so that it can be guided.

Reference numeral 45 denotes an operation section provided in an operation box 45A connected to the side end surface of the main sealed container 6, and has the following structure. That is, 42 is the operation box 4
5A is an operating lever provided on a rotating shaft 44 that is rotatably operated from outside, and a connecting link 43 that is pivoted at the tip 34B.
The tip of the guide pin 34a is roughly pivoted to the guide bin 34a.

Next, the operation of the disconnector configured as described above will be explained.

Now, the state of the movable contact rod 24 shown by the solid line in FIG. , lead-in overhead wire 4, upper connection terminal 7, line side conductor 14, second fixed contact 32, support member 17B1 third fixed contact 11B
, the movable contact rod 24, the first fixed contact 11Δ, the bus bar side conductor 15, and the bus bar 5.

Now, to disconnect this electric circuit, if the rotation shaft 44 is rotated counterclockwise from the state shown in FIG. 4(a) to the state shown in FIG. 4(b) by external operation, Lever 4
2 and the connecting link 43, the insulating rod 34 is moved to the left. Then, the tip of the movable contact rod 24 separates from the first fixed contact 11A, and becomes disconnected. In addition,
The base end of the movable contact rod 24 is not yet in contact with the ground contact 9.

Next, when grounding the line side, as shown in Fig. 4(b)
When the rotation shaft 44 is further rotated counterclockwise by an external operation from the state shown in FIG. 4 to the state shown in FIG. 4(C), the movable contact rod 24 further moves to the left to electrically connect between the third fixed contact 11B and the grounding contact 9. Therefore, the electric path includes the line side power transmission line 3, the lead-in overhead wire 4, the upper connection terminal 7, the line side conductor 14, the second fixed contact 32, the support member 17B, the third fixed contact 11B, the movable contact rod 24, and the grounding Contactor 9, support tube 33, main body sealed container 6, pedestal 1,
It becomes like earth and the line side circuit is grounded. Further, by rotating the rotating shaft 44 in the clockwise direction in the opposite direction to that described above, the operation in the reverse order can be performed.

In this way, the disconnector (in the above embodiment) is L as a whole.
A movable contact rod 24 which is formed in a letter shape and is operated to reciprocate in the same direction as the bus bar side insulator tube 13 makes it possible to electrically connect and disconnect between the two conductors 14 and 15, and furthermore, the line side conductor 14 is Since the main container 6 can be grounded,
As shown in FIG. 2, not only the wiring becomes extremely rational, but also the operating section 45 can be arranged at the bent part of the L, that is, on the side of the main container 6, and the whole can be made compact.

Furthermore, since the movable part of the above-mentioned disconnector is housed in a closed space, leakage of lubricating oil and adhesion of dust can be prevented.

Note that the insulating gas sealed in the main body sealed container 6 may be omitted and simple air insulation may be used.

Further, instead of installing the movable contact rod 24 inside the main body sealed container 6, it is also possible to install it inside the bus bar side insulator tube 13.

Effects of the Invention According to the present invention, the routing of overhead lines in power plants and substations becomes orderly, space can be reduced, and lubricating oil leakage and dust adhesion can be prevented. It has the excellent effect of maintaining good performance for a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a schematic front sectional view showing an embodiment of the disconnector of the present invention, FIG. 2 is a front view showing the state in use, FIG. 3 is a sectional view showing the on state, and FIG. ) to (C) are schematic front sectional views showing the operating state of the operating section, and FIG. 5 is a perspective view and a schematic front view showing a conventional disconnector. 2... Sealed disconnector, 6... Main body sealed container, 9...
・Grounding contact, 11A, 11B...Fixed contact, 1
2... Line side insulator tube, 13... Bus bar side insulator tube, 14.
...Line side conductor, 15...Bus bar side conductor, 24...
Movable contact rod, 45...operation unit. j15F! J Figure 6 I! Figure 7

Claims (1)

[Claims] 1. A line side insulator tube (12
), and a busbar side insulator tube (13) is provided so as to be substantially perpendicular to the insulator tube (12) and form an L-shape as a whole, and the insulator tube (1
2, 13) to guide the line side conductor (14) and bus bar side conductor (15) so that the inner ends of both conductors can be electrically connected and separated, and the line side conductor (14) is connected to the main body container (16). A movable contact rod (24) is provided which can be reciprocated in the same direction as the bus bar side insulator tube (13) so as to be grounded, and its operating portion (45) is provided on the side of the main container (6). A disconnector characterized by: 2. The disconnector according to claim 1, wherein the movable contact rod (24) is located within the main body container (6) or within the bus bar side insulator tube (13). 3. The bus bar side conductor (15) is connected to the insulating support members (16A, 16B) and the support tube (17A) arranged inside the main container (6).
The disconnector according to claim 1, wherein the disconnector is supported movably in the left and right direction by a support member (17B). 4. The operation unit (45) has a rotation shaft (
44), the operation lever (4) attached to the rotation shaft (44)
2), an insulating rod (34) that moves in the left-right direction inside the main container (6) and the shield cylinder (19D), and the main container (6).
) and has a guide groove (41a).
) and a connecting link (43) connected between the lever (42) and the insulating rod (34) and guided by the guide member (41). disconnector. 5. The disconnector according to claim 1, wherein the main body container (6) is a closed container. 6. The disconnector according to claim 5, characterized in that an insulating gas is hermetically sealed in the airtight container of the main body container (6). 7. The disconnector according to claim 6, wherein the insulating gas is sulfur hexafluoride (SF6) gas.