JP5300621B2 - Switchgear - Google Patents

Description

  The present invention relates to a switchgear used for power transmission / distribution and power reception / transformation.

  Conventionally, as shown in FIG. 8, the movable blade is supported on the branch circuit side and extends to the three-phase three main buses 52a, 52b, 52c side, and supports the movable blade 60 of the switch that opens and closes the electric circuit. A support conductor 57, a drive shaft 58 provided at an end of the movable blade support conductor 57 and rotatably supporting the movable blade 60, and a first shaft disposed at a predetermined distance from the drive shaft 58. A fixed contact 56, a second fixed contact 59 arranged at the end of the conductor extending from the main buses 52a to 52c, and an end of the movable blade support conductor 57 are rotatably supported by a drive shaft 58; The first fixed contact 56 and the movable blade 60 that opens and closes an electric circuit in contact with and away from the second fixed contact 59, and the second fixed contact 59 connects the drive shaft 58 and the first fixed contact 56. For the line from the drive shaft 58 An opening / closing device that is disposed on the main buses 52a to 52c side at a distance from each other, and the movable blade 60 circulates around the movable blade support conductor 57 side and contacts and separates from the first fixed contact 56 and the second fixed contact 59. 100, a switching device in which a main bus 52a arranged in the center among three main buses 52a to 52c of three phases is arranged farther from the drive shaft 58 than main buses 52b and 52c arranged on both sides 100 is disclosed (for example, refer to Patent Document 1).

Japanese Patent No. 3450122

  However, in the conventional switchgear 100, the main bus 52a arranged at the center of the three-phase three main buses 52a to 52c is farther from the drive shaft 58 than the main buses 52b and 52c arranged on both sides. Are arranged. Therefore, power supply destinations such as lines are arranged on both sides of the switchgear 100, and as shown in FIG. 9, the switchgear 100 is provided with the connection ports 51a and 51a of the branch circuits of the two series of switchgears 100 and 100 reversed. , When connecting the main buses 52a, the connecting bent main bus 72a, the connecting main buses 72b and 72c, and the connecting casing 71 are required, and only the length of the connecting casing 71 is required. There has been a problem that the length of the double switchgear becomes large.

  This invention is made in view of the above, Comprising: Two switchgears which made the branch circuit connection port reverse direction do not go through a connection casing, a connection bending main bus line, and a connection main bus line. It is an object of the present invention to provide a switchgear that can be directly connected and can constitute a compact two-stage switchgear without waste.

In order to solve the above-described problems and achieve the object, the present invention provides a casing having a trunk portion in which main bus connection ports are formed on both sides, and a branch circuit connection port orthogonal to the trunk portion, and the main bus bar. A main bus insulation spacer for sealing the connection port, a branch circuit insulation spacer for sealing the branch circuit connection port, and a three-phase main spacer supported by the main bus insulation spacer and arranged in parallel through the body portion A bus, a second fixed contact projecting from an intermediate portion of the main bus toward the branch circuit connection port, and a three-phase movable blade support conductor supported by the branch circuit insulating spacer and extending toward the second fixed contact A first fixed contact that is grounded to the casing and disposed in the vicinity of the second fixed contact; a drive shaft that is rotatably supported at a tip of the three-phase movable blade support conductor; Supported by the drive shaft And a movable blade that contacts and separates from the first fixed contact and the second fixed contact by rotation of the drive shaft, wherein each of the three-phase main buses is connected to the drive shaft. One end side of the main bus bars arranged on a straight line of the same distance and arranged on both sides of the three-phase main bus bars is inclined in a direction away from the drive shaft, and the other end side is a direction approaching the drive shaft It is characterized by being inclined .

  According to the present invention, two open / close devices having the branch circuit connection ports reversed can be directly connected without using the connection casing and the connection main bus line, and a compact and compact two-unit system without waste. There is an effect that an opening / closing device capable of constituting the opening / closing device is obtained.

FIG. 1 is a cross-sectional view showing a first embodiment of a switchgear according to the present invention. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a circuit diagram of the switchgear according to the first embodiment. FIG. 4 is a cross-sectional view showing the dual switchgear according to Embodiment 1 in which the connection ports of the branch circuit are connected in the reverse direction. FIG. 5 is a sectional view showing Embodiment 2 of the switchgear according to the present invention. FIG. 6 is an arrow view along the line BB in FIG. FIG. 7 is a cross-sectional view showing a dual switchgear according to Embodiment 2 in which the connection ports of the branch circuit are connected in the reverse direction. FIG. 8 is a cross-sectional view showing a conventional switchgear. FIG. 9 is a cross-sectional view showing a conventional two-stage switchgear in which connection ports of branch circuits are connected in the reverse direction.

  DESCRIPTION OF EMBODIMENTS Embodiments of a switchgear according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
1 is a cross-sectional view showing a first embodiment of the switchgear according to the present invention, and FIG. 2 is a cross-sectional view taken along the line AA of FIG.

As shown in FIGS. 1 and 2, the opening / closing device 91 according to the first embodiment is accommodated in a casing 11 in which an insulating gas such as SF ₆ is sealed. The casing 11 has a body portion in which main bus connection ports 11b and 11c are formed on both sides, and a branch circuit connection port 11a orthogonal to the conductor portion. The branch circuit connection port 11a is sealed with a branch circuit insulation spacer 13, and the main bus connection ports 11b and 11c are sealed with main bus insulation spacers 14 and 15, respectively.

  Although not shown, the branch circuit insulating spacer 13 and the main bus insulating spacers 14 and 15 are each fitted and fixed with a three-phase phase conductor therethrough. In order to increase the insulation distance, the three-phase phase conductors fixed to the branch circuit insulating spacers 13 are arranged at the apexes of the triangles, and the phase conductors fixed to the main bus insulating spacers 14 and 15 are straight. It is arranged on the line. The main buses 12a to 12c pass through the body portion of the casing 11, are arranged in parallel on a straight line at the same distance from the drive shaft 18 described later, and are connected to three-phase phase conductors arranged on the straight line. Are electrically connected to the outside and supported by the main bus-insulating spacers 14 and 15.

  The three-phase second fixed contacts 19a, 19b, and 19c each branch from the intermediate portion of the main buses 12a to 12c and project in the direction of the branch circuit connection port 11a. The three-phase first fixed contacts 16a, 16b, and 16c are respectively attached to the casing 11 and supported by grounding, and are arranged in the vicinity of the second fixed contacts 19a, 19b, and 19c.

  The three-phase movable blade support conductors 17a, 17b, and 17c constituting the branch circuit are each connected to and supported by a phase conductor that is fitted and fixed to the branch circuit insulating spacer 13, and the second fixed contact 19a. , 19b, 19c, and the other ends (tips) of the drive shaft 18 are rotatably supported. The main bus bars 12a to 12c, the first fixed contacts 16a to 16c, the movable blade support conductors 17a to 17c, and the like are made of aluminum or a copper material, and are connected to other parts by screws.

  As shown in FIG. 1, the legs of the movable blade support conductor 17 a disposed at the center are bent to the left, and the legs of the movable blade support conductors 17 b and 17 c disposed on both sides of the movable blade support conductor 17 a are It is bent to the right and connected to phase conductors arranged at the apexes of the triangles.

  As described above, the drive shaft 18 is rotatably supported at the tips of the three-phase movable blade support conductors 17a to 17c, supports the three-phase movable blades 20a, 20b, and 20c, and each of the movable blades 20a to 20c. Are electrically connected to the movable blade support conductors 17a to 17c. The drive shaft 18 is connected to each other by insulators 18a, 18b, and 18c for each phase to insulate the movable blade support conductors 17a, 17b, and 17c, and one side passes through the casing 11 and is rotationally driven by an external drive source. The

  The three-phase first fixed contacts 16a to 16c are arranged in the same row as the main buses 12a to 12c and spaced apart from each other in the direction of the drive shaft 18. The three-phase second fixed contacts 19a to 19c are arranged at positions where a line connecting the drive shaft 18 and the first fixed contacts 16a to 16c is rotated by approximately 90 ° in the main bus lines 12a to 12c direction.

  The movable blades 20a to 20c have their base ends supported by the drive shaft 18, and the rotation of the drive shaft 18 causes the distal end to rotate on the movable blade support conductors 17a to 17c side as indicated by the alternate long and short dash line. The first fixed contacts 16a to 16c and the second fixed contacts 19a to 19c are in contact with and separated from each other. Further, the opening position at which the movable blades 20a to 20c are separated from both the first fixed contacts 16a to 16c and the second fixed contacts 19a to 19c is set on the movable blade support conductors 17a to 17c side. .

  Next, the operation of the opening / closing device 91 will be described with reference to FIG. FIG. 3 is a circuit diagram of the opening / closing device 91 according to the first embodiment. When the first fixed contacts 16a to 16c and the movable blades 20a to 20c are closed, they act as a ground switch, and when the second fixed contacts 19a to 19c and the movable blades 20a to 20c are closed, they act as a disconnector. The case will be described. The circuit diagram of FIG. 3 shows a case where it acts as a disconnector.

  From the state shown in FIG. 1, when the drive shaft 18 is rotated counterclockwise by a drive source (not shown), the movable blades 20a to 20c are separated from the second fixed contacts 19a to 19c on the disconnecting side, and opened. After passing through the separation position, the movable blades 20a to 20c come into contact with the first fixed contacts 16a to 16c, and the grounding switch side is closed. In this state, maintenance and inspection work can be performed on the branch circuit connected to the end portions 17d to 17f of the movable blade support conductors 17a to 17c.

  Further, when the drive shaft 18 is rotated clockwise by the drive source in the closed state on the ground switch side where the first fixed contacts 16a to 16c and the movable blades 20a to 20c are in contact, the first switch of the ground switch is provided. The movable blades 20a to 20c are separated from the first fixed contacts 16a to 16c, and the movable blades 20a to 20c come into contact with the second fixed contacts 19a to 19c, so that the disconnecting side is closed. In this state, the end 17d of the movable blade support conductors 17a to 17c from the main buses 12a to 12c via the second fixed contacts 19a to 19c, the movable blades 20a to 20c, the drive shaft 18 and the movable blade support conductors 17a to 17c. Electric power is supplied from ˜17f to the branch circuit.

  The first fixed contacts 16a to 16c, the second fixed contacts 19a to 19c, the movable blade support conductors 17a to 17c, and the movable blades 20a to 20c are described as being housed in the casing 11 filled with an insulating gas. However, they may be installed in an insulating atmosphere such as air.

  Next, a connection method of the switchgear when the power supply destination such as a line is arranged on both sides of the switchgear will be described. FIG. 4 is a cross-sectional view showing the dual switchgear according to Embodiment 1 in which the branch circuit connection port 11a is connected in the reverse direction.

  The posture of the opening / closing device 91 arranged on the right side in FIG. 4 is obtained by rotating the posture of the opening / closing device 91 arranged on the left side by 180 ° around an axis perpendicular to the drawing. The left and right switchgears 91 share a main bus insulation spacer 14 and are connected to the main bus connection ports 11 b of the casing 11, and the phase conductors in which the main buses 12 a to 12 c are fitted to the main bus insulation spacer 14. Is connected through the conductor.

  When connecting the switchgears 91 to each other, one of the switchgears 91 is rotated by 180 ° around the main bus 12a to share the main busbar insulating spacer 14 and connect the main busbar connection port 11b and the main busbar connection port 11c. You may make it connect.

  In the opening / closing device 91 of the first embodiment, each of the three main buses 12a to 12c is arranged on a straight line at the same distance from the drive shaft 18, so that the two branch circuit connection ports 11a are reversed. The open / close devices 91 can be connected directly without using the connecting casing and the connecting main bus line, and a compact double open / close device can be configured without waste.

Embodiment 2. FIG.
5 is a cross-sectional view showing a second embodiment of the switchgear according to the present invention, FIG. 6 is a view taken along the line BB in FIG. 5, and FIG. 7 is a branch circuit connection port 11a. It is sectional drawing which shows the 2 series switchgear of Embodiment 2 which connected in reverse.

  As shown in FIGS. 5 and 6, the switching device 92 of the second embodiment is different from the configuration of the main buses 12 b and 12 c of the switching device 91 of the first embodiment in that the configuration of the main buses 22 b and 22 c arranged on both sides is the same. Differently, the other parts are not different from the opening / closing device 91 of the first embodiment. The form of the main buses 22b and 22c will be described, and description of other parts will be omitted.

  As shown in FIG. 5, the main buses 22b and 22c of the switchgear 92 according to the second embodiment include a central portion arranged at the same distance from the drive shaft 18 as the main bus 12a, and inclined portions connected to both ends of the central portion. 22s. The inclined portion 22 s is inclined at the one end side of the main buses 22 b and 22 c in a direction away from the drive shaft 18, and the other end side is inclined in a direction approaching the drive shaft 18. As shown in FIG. 6, the end portion of the main bus 12a and the end portion of the inclined portion 22s are connected to phase conductors 30a, 30b, and 30c arranged at the apexes of the triangle, respectively, in order to increase the insulation distance. ing.

  Next, a method of connecting the two switchgears 92 when power supply destinations such as lines are arranged on both sides of the switchgear 92 will be described. FIG. 7 is a cross-sectional view showing the dual opening / closing device 92 of Embodiment 2 in which the branch circuit connection port 11a is connected in the reverse direction.

  The attitude of the switchgear 92 arranged on the right side in FIG. 7 is obtained by rotating the attitude of the switchgear 92 arranged on the left side by 180 ° around the main bus 12a and turning the branch circuit connection port 11a in the reverse direction. . The left and right switchgears 92 share the main bus insulation spacer 14 and are connected to the main bus connection ports 11b and 11c of the casing 11, and the main bus 12a and the main buses 22b and 22c are fitted to the main bus insulation spacer 14. Conductive connection is established through the combined phase conductors 30a to 30c.

  In the opening / closing device 92 of the second embodiment, the central portions of the three main bus bars 12a, 22b, and 22c are arranged on a straight line at the same distance from the drive shaft 18, and the inclined portions 22s of the main bus bars 22b and 22c are Since one side of the central part is connected to the central part so as to incline upward, and on the other side, it is connected to the central part so as to incline downward, so that two branch opening / closing with the branch circuit connection port 11a reversed The devices 92 can be directly connected to each other without using the connecting casing and the connecting main bus, and a compact two-stage open / close device without waste can be configured.

  As described above, the switchgear according to the present invention is suitable for power transmission and distribution.

11 Casing 11a Branch circuit connection port 11b, 11c Main bus connection port 12a, 12b, 12c, 22b, 22c Main bus 22s Inclined portion 13 Branch circuit insulation spacer 14, 15 Main bus insulation spacer 16a, 16b, 16c First fixed contact 17a, 17b, 17c Movable blade support conductor 18 Drive shaft 18a, 18b, 18c Insulator 19a, 19b, 19c Second fixed contact 20a, 20b, 20c Movable blade 30a, 30b, 30c Phase conductor 91, 92 Switchgear

Claims (1)

A casing having a trunk portion in which main bus connection ports are formed on both sides and a branch circuit connection port orthogonal to the trunk portion;
A main bus insulating spacer for sealing the main bus connecting port and a branch circuit insulating spacer for sealing the branch circuit connecting port;
A three-phase main bus supported by the main bus insulating spacer and arranged in parallel through the body portion;
A second fixed contact projecting in the direction of the branch circuit connection port from an intermediate portion of the main bus;
A three-phase movable blade support conductor supported by the branch circuit insulating spacer and extending in the direction of the second fixed contact;
A first fixed contact that is grounded to the casing and disposed in the vicinity of the second fixed contact;
A drive shaft rotatably supported at the tip of the three-phase movable blade support conductor;
A movable blade supported by the drive shaft and contacting and separating from the first fixed contact and the second fixed contact by rotation of the drive shaft;
Each of the three-phase main bus bars is arranged on a straight line at the same distance from the drive shaft , and one end side of the main bus bars arranged on both sides of the three-phase main bus bars is The opening / closing device is inclined in a direction away from the drive shaft, and the other end is inclined in a direction approaching the drive shaft .

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