JP6514621B2 - Bypass switch - Google Patents

Description

  The present invention relates to a side switch connected to an automatic voltage regulator serially connected to a line of a power system.

  In the power system, in order to keep the line voltage within a predetermined range, an automatic voltage regulator equipped with an on-load tap changer is inserted in the middle of the line. When performing maintenance inspection or repair of this automatic voltage regulator, it is necessary to disconnect the voltage regulator from the line without interruption, and after maintenance inspection or repair is completed, the insertion needs to be performed without interruption. is there. Therefore, an automatic voltage regulator installed in the power system is provided with a bypass switch which enables uninterrupted insertion and disconnection of the automatic voltage regulator.

  As disclosed in Patent Document 1 and Patent Document 2, the side switch is a switch that performs insertion of the automatic voltage regulator into the line and disconnection of the automatic voltage regulator from the line, and a switch And a current limiting resistor connected in parallel between the output terminals of the automatic voltage regulator and in series with the line in the process of inserting and disconnecting the automatic voltage regulator.

  3 (A) to 3 (D) schematically show the configuration of the main part of the power system in which the automatic voltage regulator is installed, and in the figure, 1 and 2 indicate the power supply side line and the load side line, respectively. , 3 is an automatic voltage regulator (SVR) connected in series to the line, and 4 is a side switch.

  The automatic voltage regulator 3 is, for example, a transformer with a tap inserted in the middle of the line to convert the voltage of the power supply side line 1 into a voltage to be applied to the load side line 2, and a load for switching the current application tap of this transformer A time tap changer is provided, and the on-load tap changer is controlled according to the line voltage to adjust the voltage of the load side line 2 to be in a target range.

  The side switch 4 shown in FIG. 3 has the power supply side line connection terminal 401 and the load side line connection terminal 402 respectively attached to one and the other of the two opposite side surfaces of the box-shaped case 400, and the power supply side. A power supply side regulator connection terminal 403 and a load side respectively attached to one side and the other side of two opposing side surfaces of the case 400, respectively located on the side of the line connection terminal 401 and the side of the load side line connection terminal 402 Power supply side line connection terminal 401 and load side line connection terminal 402 are respectively connected to power supply side line connection terminal 401 and load side line connection terminal 402, and power supply side adjustment terminal 403 and load side adjustment are provided. Power supply side terminal (terminal connected to the power supply side line 1) 301 of the automatic voltage regulator 3 and an end connected to the load side line 2 (load side line 2) ) 302 is connected.

  In the case 400 of the side switch 4, the fixed contact 4a disposed in the vicinity of the power supply side regulator connection terminal 403, and the fixed contact disposed in a position closer to the power supply side line connection terminal 401 than the fixed contact 4a. 4b, a fixed contact 4c disposed closer to the load-side line connection terminal 402 than the fixed contact 4b, and a fixed contact 4d disposed closer to the load-side regulator connection terminal 404 than the fixed contact 4c The fixed contacts 4a to 4d are arranged on the same plane in order along one arc.

  In the illustrated example, the fixed contacts 4a and 4b are connected to the power supply side regulator connection terminal 403 and the power supply side line connection terminal 401, respectively, and the fixed contact 4d is connected to the load side regulator connection terminal 404. A current limiting resistor R is connected between the fixed contacts 4b and 4c.

  Also in the case 4, with the insulating operation axis 405 extending in the direction orthogonal to the plane on which the fixed contacts 4a to 4d are arranged, the central axis thereof coincides with the central axis of the circular arc along which the fixed contacts 4a to 4d extend. The first movable contact 406 and the second movable contact 407 are supported by the operation shaft 405.

  The first movable contact 406 is an arc-shaped movable contact that is brought into contact with the fixed contact 4 a. One end of the first movable contact 406 in the circumferential direction is integrated with the rear end of an arm extending in the radial direction of the operating shaft 405, and the tip of this arm is connected to the operating shaft 405. The first movable contact 406 is supported by the operating shaft 405.

  The second movable contact 407 is an arc-shaped movable contact that serves to bridge between the adjacent fixed contacts 4c and 4d, and the arc length thereof can be in contact with the fixed contacts 4c and 4d. It is set. The rear end of the arm portion extending in the radial direction of the operation shaft 405 is integrated with the circumferential center of the second movable contact 407, and the tip end of this arm portion is connected to the operation shaft 405. Two movable contacts 407 are supported by the operation shaft 405. The arms connecting the first movable contact 406 and the second movable contact 407 to the operating shaft 405 are arranged symmetrically with an angular interval of 180 degrees, and along with the rotation of the operating shaft 405, The first movable contact 406 and the second movable contact 407 are operated to rotate while maintaining a fixed positional relationship. The first movable contact 406 is electrically connected to the power supply line connection terminal 401, and the second movable contact 407 is electrically connected to the load line connection terminal 402.

  In this example, the case 400, the power supply side and load side line connection terminals 401 and 402, the power supply side and load side regulator connection terminals 403 and 404, the fixed contacts 4a to 4d, the insulation operation shaft 405, and the first The bypass switch 4 is configured by the second movable contacts 406 and 407, a mechanism (not shown) for rotating the operation shaft 405, and the current limiting resistor R.

  In the side switch 4 shown in FIG. 3, in the state in which the automatic voltage regulator 3 is connected in series to the line, as shown in FIG. 3 (A), the first movable contact 406 is the fixed contact 4a. While connecting the power supply side line connection terminal 401 to the power supply side regulator connection terminal 403 (connecting the power supply side line 1 to the power supply side terminal 301 of the automatic voltage regulator 3), the second movable contact 407 Connects the load-side line connection terminal 402 and the load-side regulator connection terminal 404 (between the load-side line 2 and the load-side terminal 302 of the automatic voltage regulator 3). ing. In this state, line 1-power supply side line connection terminal 401-first movable contact 406-fixed contact 4a-power supply side regulator connection terminal 403-automatic voltage regulator 3-load side regulator connection terminal 404-fixed contact 4d Second movable contact 407-Load-side line connection terminal 402-Line current flows along the line 2.

  When disconnecting the automatic voltage regulator 3 from the line, the insulating operation shaft 405 is operated to turn the first movable contact 406 and the second movable contact 407 counterclockwise in the drawing from the state of FIG. Rotate. When the first movable contact 406 and the movable contact 407 are turned counterclockwise, the first movable contact 406 is kept in contact with the fixed contact 4a, as shown in FIG. The two movable contacts 407 are in contact with the fixed contacts 4c and 4d. At this time, the current limiting resistor R is connected in series to the line and is connected in parallel to both ends of the automatic voltage regulator 3 so that the power supply side terminal 301 and the load side terminal 302 of the automatic voltage regulator 3 are connected. Limits the circulating current due to the voltage between the taps appearing between

  Then, as shown in FIG. 3C, while the first movable contact 406 separates from the fixed contact 4a, the second movable contact 407 separates from the fixed contact 4d and is in contact with only the fixed contact 4c. . In this state, the voltage regulator 3 is disconnected from the line, and the current limiting resistor R is connected in series to the lines 1 and 2. At this time, the line current flows in the circuit of line 1-power supply side line connection terminal 401-current limiting resistor R-fixed contact 4c-second movable contact 407-load side line connection terminal 402-load side line 2.

  When the first and second movable contacts 406 and 407 further rotate counterclockwise in the drawing from the state of FIG. 3C, as shown in FIG. 3D, the second movable contact 407 is a fixed contact. It will be in the state which contacted 4b. At this time, the line current flows through the circuit of the power supply side line 1-power supply side line connection terminal 401-fixed contact 4b-second movable contact 407-load side line connection terminal 402-load side line 2, and the line current is limited. It flows without passing through the flow resistor R. Insertion of the automatic voltage regulator 3 into the line is performed by the reverse operation to the above.

  In the example shown in FIG. 3, the insertion of the automatic voltage regulator 3 into the line and the automatic voltage adjustment from the line by the fixed contacts 4a to 4d and the first movable contact 406 and the second movable contact 407 The switch part which disconnects the vessel 3 and connects and opens the current limiting resistor R is configured.

  The current limiting resistor R used in this kind of bypass switch 4 uses a resistance wire 6 made of a material having a high electrical resistance such as nichrome as a resistor, as shown in FIG. The resistance wire 6 is configured to be wound around the outer periphery of a cylindrical winding frame 7 made of an insulating material. Further, the current limiting resistor R is floated from the insulating support plate 8 by fixing both ends of the winding frame 7 to the brackets 9 fixed to the surface of the insulating support plate 8 made of an insulating material plate. It was supported by the state.

  In order to effectively utilize the space in the case 400 of the side switch 4, the insulating support plate 8 supporting the current limiting resistor R is also used as the insulating support plate 8 supporting at least a part of the components constituting the opening / closing portion. Used. In the example shown in FIG. 4, fixed contacts 4b and 4c connected to one end and the other end of current limiting resistor R are attached to the back surface of insulating support plate 8, and one end of current limiting resistor R and fixed contact 4b And between the other end of the current limiting resistor R and the fixed contact 4 c are connected through the connecting conductors 10 and 11. In the illustrated example, one end of the insulating support plate 8 is connected to the power supply side line by bolting the L-shaped connection plate 12 integrally provided to the fixed contact 4 b to the terminal fitting of the power supply side line connection terminal 401. The connection plate 13 supported by the terminal 401 and fixed to the other end of the insulating support plate 8 is bolted to the terminal fitting of the load-side line connection terminal 402 so that the other end of the insulating support plate 8 is connected to the load-side line It is mechanically supported by the terminal 402.

  Note that FIG. 3 basically shows an example of the configuration of the side switch 4. The configuration of the side switch 4 to which the present invention is applied is not limited to that shown in FIG. The present invention is connected in series to the line in parallel with the automatic voltage regulator 3 in the process of inserting the automatic voltage regulator 3 in series in the line of the power system and in the process of disconnecting the automatic voltage regulator 3 from the line. Current limiting resistor R, insertion of the automatic voltage regulator 3 on the line, disconnection of the automatic voltage regulator 3 from the line, and shorting and opening of the current limiting resistor R in a defined sequence It can be widely applied to the side road switch 4 in which the current limiting resistor R is supported by the insulating support plate 8 provided with the opening and closing portion and at least a part of the parts constituting the opening and closing portion being supported.

JP-A-51-38667 Unexamined-Japanese-Patent No. 11-54000

  In the conventional side switch 4, as shown in FIG. 4, since the current limiting resistor R configured by winding the resistance wire 6 around the winding frame is supported in a state of being floated from the insulating support plate 8. However, there is a problem that a large dead space is formed around the current limiting resistor R, and the case of the side switch 4 becomes large. In addition, since the number of components constituting the current limiting resistor R increases, there is also a problem that the number of steps required for the assembly increases and the cost increases.

  The object of the present invention is to reduce the number of parts constituting the current limiting resistor R to simplify the structure and reduce the cost, and a wide dead space is formed around the current limiting resistor R. It is an object of the present invention to provide a side switch 4 in which the case is prevented from becoming large and the case is prevented from becoming large.

The present invention, the line in parallel in one process at the time of from a process and the line at the time of inserting the automatic voltage regulator in series with the line of the power system separating the automatic voltage regulator to the automatic voltage regulator Current limiting resistors connected in series with each other, insertion of an automatic voltage regulator on the line, disconnection of the automatic voltage regulator from the line , current limiting resistance between the current limiting resistor and the line, and current limiting resistance The present invention is directed to a side switchgear having a switch for connecting and disconnecting between the switch and the automatic voltage regulator .

In the present invention, at least a part of the components of the opening / closing part is supported by the insulating support plate, and the current limiting resistor is made of a resistor directly held by the insulating support plate .

  In a preferred aspect of the present invention, the resistor is constituted by a resistance wire wound around an insulating support plate.

In another preferred aspect of the present invention, the resistor is made of a plate made of a material having an electrical resistance, and the plate is directly held on any surface of the insulating support plate.

  In still another preferred aspect of the present invention, a plurality of plate members constituting the resistor are provided, and the plurality of plate members are held on the same surface or different surfaces of the insulating support plate and electrically connected in series or in parallel. Connected

  As described above, when the current limiting resistor is configured by directly supporting the resistor on the insulating support plate that supports the components of the switch, without providing a holder for the current limiting resistor such as a winding frame, The height of the current limiting resistor can be made much lower than in the case of using a current limiting resistor consisting of a winding frame and a resistance wire wound around the winding frame. Since it is possible to make the flow resistor hardly rise, it is possible to prevent the formation of a dead space around the current limiting resistor, and to miniaturize the case of the side switch. Further, since the number of components constituting the current limiting resistor can be reduced, the cost can be reduced.

  In particular, when the resistor is configured by the resistance wire wound around the insulating support plate, the height of the current limiting resistor protruding from the surface of the insulating support plate is a height determined by the wire diameter of the resistance wire. The bumps formed on the surface of the plate can be lowered. In addition, since the current limiting resistor can be configured using the resistance wire used in the conventional current limiting resistor as it is without preparing a new resistor material if a resistance wire is used, a winding frame is unnecessary. And the cost of the current limiting resistor can be significantly reduced. Further, since the resistance value of the current limiting resistor can be adjusted by adjusting the length of the resistance wire, it is possible to easily obtain the current limiting resistor having a desired resistance value.

  Also, in the case of adopting a structure in which the resistor of the current limiting resistor is made of a plate material formed of a material having an electric resistance and the plate material is directly held on any surface of the insulating support plate, the insulating support plate The protrusion height of the resistor from the bottom can be reduced to prevent the formation of a dead space around the current limiting resistor. In addition, using a plate made of a material having an electrical resistance as the resistor constituting the current limiting resistor makes it possible to omit the work of winding the resistance wire around the insulating support plate, so the side switch can be easily assembled. Can be

  It is preferable that the components of the opening and closing part supported by the insulating support plate be at least a part of the parts constituting the part for connecting and disconnecting the current limiting resistor among the parts of the opening and closing part. That is, the resistor constituting the current limiting resistor is directly supported by the insulating support plate on which at least a part of the parts constituting the connection / disconnection portion of the current limiting resistor is supported among the parts of the switching part Is preferred.

  According to this structure, the connection structure between the switch and the current limiting resistor can be simplified, so that the structure of the side switch can be simplified and the cost can be reduced.

  According to the present invention, the current limiting resistor is configured by directly supporting the resistor on the insulating support plate that supports the components of the opening / closing section without providing a holder exclusively for the current limiting resistor such as a winding frame. As a result, the height of the current limiting resistor is much lower than that of a conventional shunt switch using a current limiting resistor consisting of a winding frame and a resistance wire wound around the winding frame. can do. Therefore, it is possible to prevent a dead space from being formed around the current limiting resistor by making the current limiting resistor hardly protrude from the surface of the insulating support plate, and to miniaturize the case of the side switch. Can be Further, since the number of components constituting the current limiting resistor can be reduced, the cost can be reduced.

  Further, in the present invention, in the case where the component of the opening and closing part supported by the insulating support plate is at least a part of the parts constituting the part performing connection and disconnection of the current limiting resistor among the parts of the opening and closing part Since the connection structure between the switch and the current limiting resistor can be simplified, the structure of the side switch can be simplified and the cost can be reduced.

(A) is the front view which showed the principal part of one Embodiment of this invention. (B) is a cut end view along the I-I 'line of (A). (A) is the front view which showed the principal part of other embodiment of this invention. (B) is a cut end view along a II-II 'line of (A). (A) thru | or (D) are the block diagrams which showed roughly an example of the structure in the different operation state of the side switch 4. It is the front view which showed the structure of the current limiting resistor vicinity of the conventional shunt switch 4. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the present embodiment, it is assumed that the side switch 4 is configured in the same manner as that shown in FIGS. 3 (A) to 3 (C). Therefore, in the following description, the one shown in FIG. 3 is used as a reference symbol for indicating each part of the side switch.

  1 (A) and 1 (B) show a first embodiment of the present invention. In FIG. 1, reference numeral 8 denotes a current limiting resistor of the respective portions of the switching unit provided in the side switch 4. A rectangular insulating support plate supporting a part of a component forming a part for connecting and disconnecting between R and the lines 1 and 2 and a part forming a part for performing a short circuit and an open of the current limiting resistor R It is eight. In the illustrated example, fixed contacts 4 b and 4 c connected to one end and the other end of the current limiting resistor R among the components constituting the opening and closing portion are fixed to the insulating support plate 8.

  The fixed contact 4b is disposed on the back surface of one end side of the insulating support plate 8 in the longitudinal direction, and the bolt 15 penetrating the support plate 8 is screwed into the screw hole provided in the fixed contact 4b. It is fastened to the support plate 8. The fixed contact 4c is disposed near the other end of the insulating support plate 8 in the longitudinal direction, and a bolt 16 penetrating the insulating support plate 8 is screwed into a screw hole provided in the fixed contact 4c, thereby securing the fixed contact 4c. Are fastened to the insulating support plate 8.

  The fixed contact 4 b is integrally provided with an L-shaped connection plate 12 extending toward the power supply line connection terminal 401, and the tip of the connection plate 12 is bolted to the terminal conductor of the power supply line connection terminal 401. Thereby, the fixed contact 4 b is electrically connected to the terminal conductor of the power supply side line connection terminal 401.

  An L-shaped connecting plate 13 is bolted to the other end of the insulating support plate 8, and the connecting plate 13 is bolted to the terminal conductor of the load-side line connection terminal 402 so that the other end of the insulating support plate 8 is Is mechanically supported by the load side line connection terminal 402.

  In the present invention, the current limiting resistor R is directly held by the insulating support plate 8 which supports at least a part of the components (the fixed contacts 4b and 4c in the illustrated example) constituting the opening and closing portion of the side switch 4. It is constituted by the resistor. In the present invention, to hold the resistor directly to the insulating support plate 8 means to insulate the resistor itself without using a support member disposed in a state of projecting from the insulating support plate 8 like a winding frame or a bracket. 8 means holding in mechanical contact.

  In the embodiment shown in FIG. 1, the resistor constituting the current limiting resistor R is made of the resistance wire 6 made of nichrome or the like, and is located between the fixed contacts 4b and 4c of the insulating support plate 8. The current limiting resistor R is configured by winding the resistance wire 6 in a coil shape around a portion. Then, a terminal plate 17 to which one end of the current limiting resistor R is connected is disposed on a portion of the upper surface near the one end in the longitudinal direction of the insulating support plate 8 facing the fixed contact 4b. The bolt 18 penetrating the plate 8 is screwed into the fixed contact 4 b, whereby the terminal plate 17 is fastened to the insulating support plate 8 and is electrically connected to the fixed contact 4 b.

  Further, a terminal plate 19 to which the other end of the current limiting resistor R is connected is disposed on the upper surface of a portion facing the fixed contact 4c near the other end of the insulating support plate 8 in the longitudinal direction. The terminal plate 19 is fastened to the insulating support plate 8 by being screwed into the fixed contact 4c with a bolt 20 penetrating the support plate 8 and is electrically connected to the fixed contact 4c.

  As in the present embodiment, when the current limiting resistor R is configured by directly winding the resistance wire 6 around the insulating support plate 8 supporting the components of the opening and closing portion, the winding frame and the resistance wound around the winding frame The height of the current limiting resistor R can be made much lower than when the current limiting resistor R consisting of the wires 6 is supported on the insulating support plate 8 through the bracket, and the surface of the insulating support plate 8 Since the current limiting resistor R can be made to hardly stand out from the above, formation of a dead space around the current limiting resistor R can be prevented, and the case of the side switch 4 can be miniaturized. Can. Further, since the number of components constituting the current limiting resistor R can be reduced, the cost can be reduced.

  As described above, when configuring the current limiting resistor R by winding the resistance wire 6 in a coil shape around the insulating support plate 8, the adjacent turns of the coil are in contact with each other, and the resistance of the current limiting resistor R In order to prevent the value from becoming smaller than the desired resistance value, a portion of the insulating support plate 8, for example, a side surface of each end of the width direction of the insulating support plate 8 receives a portion of each turn of the resistance wire 6 A groove may be provided to hold the position of each turn of the line 6.

  In the above embodiment, the current limiting resistor R is configured by collectively winding the resistance wire 6 constituting the resistor at a portion located between the fixed contacts 4 b and 4 c of the insulating support plate 8. When the resistance wire 6 can not be collectively wound in one place in relation to the components of the opening / closing unit supported by the insulating support plate 8, a plurality of insulating support plates 8 that do not interfere with the components of the opening / closing unit It is also possible to configure a plurality of unit resistors by separately winding resistance wire 6 in each region, and to configure current limiting resistor R by connecting these unit resistors in series or in parallel. .

  FIGS. 2A and 2B show another embodiment of the present invention. In this embodiment, the resistor constituting the current limiting resistor R is formed of a plate material (fixed resistor) formed of a material having an electric resistance, and the plate material is formed on any surface of the insulating support plate 8. Directly held. In the illustrated example, the resistor constituting the current limiting resistor R is formed of a rectangular plate 21 formed of a material having an electrical resistance such as carbon, and the plate 21 has an insulating support plate in the thickness direction. In a state of being aligned with the thickness direction 8, the insulating support plate 8 is disposed so as to overlap the upper surface of the insulating support plate 8. Further, a bolt 23 penetrating the plate 21 and the insulating support plate 8 is screwed into the fixed contact 4b, whereby one end of the plate 21 (one end of the current limiting resistor R) is fastened to the insulating support plate 8 One end of the plate 21 is electrically connected to the fixed contact 4 b through the bolt 23.

  Further, a bolt 25 penetrating the plate member 21 and the insulating support plate 8 is screwed into the fixed contact 4c. Thus, the plate 21 is fastened to the insulating support plate 8, and the other end of the plate 21 (the other end of the current limiting resistor) is electrically connected to the fixed contact 4 c through the bolt 25.

  In the example shown in FIG. 2, the plate member 21 constituting the resistor of the current limiting resistor R is held by the insulating support plate 8 in a state of being superimposed on the upper surface of the insulating support plate 8. The insulating support plate 8 may be disposed so as to overlap with the lower surface of the insulating support plate 8 and held by the insulating support plate 8.

  Further, when there is a space on the side of the side surface of the insulating support plate 8, the plate member 21 constituting the resistor of the current limiting resistor R is disposed in a state of being in contact with the side surface of the insulating support plate 8 Alternatively, the insulating support plate 8 may be directly held by appropriate means such as screwing.

  In the embodiment shown in FIG. 2, the current limiting resistor R is constituted by one plate member 21, but a plurality of plate members 21 are held on the same surface or a different surface of the insulating support plate 8. Connecting a plurality of plates in series in order to increase the resistance value of R, or connecting a plurality of plates in parallel in order to increase the current capacity of the current limiting resistor R You can also.

  As in the present embodiment, even when the current limiting resistor R is configured by the plate member 21 made of a fixed resistor, the current limiting resistor R can be substantially prevented from protruding from the surface of the insulating support plate 8. A dead space can be prevented from being formed around the current limiting resistor R, and the case of the side switch 4 can be miniaturized. In addition, when the plate member 21 formed of a material having an electric resistance is used as the resistor constituting the current limiting resistor R, the work of winding the resistance wire 6 around the insulating support plate 8 can be omitted, so the side path switch The number of assembling steps 4 can be reduced to reduce the manufacturing cost.

  As shown in FIG. 2, when using the plate member 21 (fixed resistor) as a resistor constituting the current limiting resistor R, the insulating support plate 8 is penetrated to form a window portion, and the window portion is closed. Thus, when the plate material constituting the current limiting resistor R is attached, not only can heat be radiated from the surface of the plate (the surface opposite to the insulating support plate 8), but also the above-mentioned window from the back surface of the plate Since heat dissipation can be performed through the part, heat dissipation from the current limiting resistor R can be satisfactorily performed.

  As in the above embodiments, the disconnection of the automatic voltage regulator 3 from the line, and the connection and disconnection between the current limiting resistor R and the line and between the current limiting resistor R and the automatic voltage regulator 3 An insulating support plate on which at least a part of the parts constituting the part performing connection and disconnection of the current limiting resistor R (in the above embodiments, the fixed contacts 4b and 4c) is supported If the resistor constituting the current limiting resistor R is directly supported at 8, the connection between the switch and the current limiting resistor R can be made with a simple structure. And the cost can be reduced.

  However, the present invention is not limited to the configuration as described above, and among the components of the opening and closing part, the parts constituting the part other than the part performing connection and disconnection of the current limiting resistor R are supported It is also possible to directly support the resistor constituting the current limiting resistor R on the insulating substrate.

  Although the embodiment of the present invention has been described by taking the side switch 4 having the configuration shown in FIG. 3 as an example, the configuration of the side switch 4 to which the present invention can be applied is not limited to the example shown in FIG. The thing is as above-mentioned.

Reference Signs List 1 power supply side line 2 load side line 3 automatic voltage regulator 4 side switch 400 case 401 power supply line connection terminal 402 load side line connection terminal 403 power supply side regulator connection terminal 404 load side regulator connection terminal 4a to 4d switching Fixed contact R current limiting resistor 405 Insulating operation shaft 406 First movable contact in the opening and closing portion 407 Second movable contact in the opening and closing portion 6 Resistance wire 8 Insulation support plate 12 Connection plate 13 Connection plate 17 terminal plate 18 volt 19 terminal plate 20 volt 21 plate member made of solid resistor 23 volt 25 volt

Claims (5)

Series of paralleling to the line in parallel with the automatic voltage regulator in a process of inserting an automatic voltage regulator in series in a line of a power system and in one process of disconnecting the automatic voltage regulator from the line a current limiting resistor connected to, and between the current limiting resistor with the insertion of the automatic voltage regulator instrumentation unit with automatic voltage regulator cut away and the current limiting resistor and the line from the line to the line And a switch for connecting and disconnecting between the voltage regulator and the automatic voltage regulator ,
At least a part of the components of the opening and closing part is supported by the insulating support plate;
The current limiting resistor comprises a resistor directly held on the insulating support plate,
開 閉 特 徴 側 側.   The shunt switch according to claim 1, wherein the resistor comprises a resistance wire wound around the insulating support plate.   The shunt switch according to claim 1, wherein the resistor is made of a plate material made of a material having an electric resistance, and the plate material is directly held on any surface of the insulating support plate.   The side plate switch according to claim 3, wherein a plurality of the plate members are provided, and the plurality of plate members are held by the same surface or different surfaces of the insulating support plate and electrically connected in series or in parallel. .   The component of the opening and closing part supported by the insulating support plate is at least a part of the parts constituting the part for connecting and disconnecting the current limiting resistor among the parts of the opening and closing part. , 3 or 4.

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