Switchgear

Abstract

To reliably prevent a disconnector and an earthing switch or fast-acting earthing switch from closing simultaneously without affecting a switching function even when a mechanical interlocking device is installed between the disconnector and the earthing switch or fast-acting earthing switch.SOLUTION: In a switchgear according to the present invention, a disconnector and a grounding switch are electrically connected via a connection portion, and the disconnector and the grounding switch are each provided with an interlock device that blocks switching operations, and the interlock device of the disconnector and the interlock device of the grounding switch are connected via a Bowden pull cable or a push cable.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an opening / closing device, and more particularly to an opening / closing device suitable for each of a disconnector (DS) and an earthing switch (ES) or a fast operating earthing switch (FAES) used in, for example, a gas insulated switchgear (GIS), which is provided with an interlock device for interrupting an opening / closing operation.

Background Art

[0002] In a gas insulated switchgear, at least one disconnector surrounded by metal filled with gas inside is used. This disconnector is used to disconnect an electrical device from a high voltage line to ensure safe operation and maintenance of the electrical device without load.

[0003] Also, from the viewpoint of safety, at least one earthing switch or fast operating earthing switch can be used together with the disconnector to insulate capacitive current or inductive current.

[0004] By the way, in order to avoid the phase to the ground fault, the disconnector and the earthing switch or the fast operating earthing switch are not allowed to close simultaneously.

[0005] Normally, an electrical interlock device is installed between the disconnector and the earthing switch or the fast operating earthing switch, and this interlock device cuts off the current supply to the motor that drives the operating device for the disconnector and the operating device for the earthing switch or the fast operating earthing switch, thereby interlocking the operating device for the disconnector and the operating device for the earthing switch or the fast operating earthing switch.

[0006] For example, in Patent Document 1, excessive stress is applied to the interlock device even by fast operation. The present invention relates to a power switchgear having a long-life mechanical interlock mechanism without using a It is listed.

[0007] In order to achieve the above object, the electric power switchgear described in Patent Document 1 has the following mutually related components: Opening or closing one of at least two switches, such as a circuit breaker, or In relation to the switching state, the other switch, e.g. a fast acting earthing switch, is open or closed, or An interlock device that mechanically interlocks the closing operation and a switching driver for one of the switches A mechanical connection mechanism is provided for connecting the interlock device of the drive system and the other switch. A play engagement portion is provided in the middle of the mechanism including the opening / closing drive system and the mechanical connecting mechanism, and this play engagement portion is and a biasing means for biasing the opening / closing drive system and the mechanical connecting mechanism in the engagement direction at all times to the engagement portion. It is stated that the following has been established. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 17814 / 1983 Summary of the Invention [Problem to be solved by the invention]

[0009] In the prior art, to provide additional safety and avoid incorrect electrical and manual operation, For this reason, a mechanical interlock device shall be provided between the disconnector and the earthing switch or the fast acting earthing switch. By providing a device for closing both the disconnector and the earthing switch or the fast acting earthing switch simultaneously, I can't do that.

[0010] However, there is no mechanical interface between the disconnector and the earthing switch or the fast acting earthing switch. Considering the need for a locking device, it is necessary to develop a new mechanism to meet all requirements from the technical and bay layout perspectives of gas-insulated switchgear. From the perspective of the bay layout of the gas-insulated switchgear, it is necessary to develop a new mechanism to meet all requirements.

[0011] Between the existing circuit breaker and the earthing switch or high-speed earthing switch, it is also important that the switching functions of the circuit breaker and the earthing switch or high-speed earthing switch should not be affected when introducing a mechanical interlocking device. When introducing a mechanical interlocking device between the existing circuit breaker and the earthing switch or high-speed earthing switch, it is also important that the switching functions of the circuit breaker and the earthing switch or high-speed earthing switch should not be affected. It is also important that the switching functions of the circuit breaker and the earthing switch or high-speed earthing switch should not be affected.

[0012] The above-mentioned Patent Document 1 does not describe any solutions to solve such problems. It does not describe any solutions to solve such problems.

[0013] The present invention has been made in view of the above points, and its object is to provide a switching device that can surely prevent the circuit breaker and the earthing switch or high-speed earthing switch from closing simultaneously without affecting the switching functions of the circuit breaker and the earthing switch or high-speed earthing switch even when a mechanical interlocking device is installed between them. Even if there is a mechanical interlocking device installed between the circuit breaker and the earthing switch or high-speed earthing switch, the object is to provide a switching device that can surely prevent them from closing simultaneously without affecting the switching functions of the circuit breaker and the earthing switch or high-speed earthing switch. Even if there is a mechanical interlocking device installed between the circuit breaker and the earthing switch or high-speed earthing switch, it is to provide a switching device that can surely prevent them from closing simultaneously without affecting the switching functions of the circuit breaker and the earthing switch or high-speed earthing switch. Even if there is a mechanical interlocking device installed between the circuit breaker and the earthing switch or high-speed earthing switch, it is to provide a switching device that can surely prevent them from closing simultaneously without affecting the switching functions of the circuit breaker and the earthing switch or high-speed earthing switch. .

Means for Solving the Problem

[0014] The switching device of the present invention is a switching device in which a circuit breaker and an earthing switch are electrically connected via a connection part, and each of the circuit breaker and the earthing switch is provided with an interlocking device for interrupting an opening / closing operation, characterized in that the interlocking device of the circuit breaker and the interlocking device of the earthing switch are connected via a Bowden cable or a push cable. .

Effect of the Invention

[0015] According to the present invention, even if a mechanical interlock device is installed between a circuit breaker and an earthing switch or a high-speed operating earthing switch, it is possible to surely prevent the two from closing simultaneously without affecting the switch functions of the circuit breaker and the earthing switch or the high-speed operating earthing switch.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0017] Hereinafter, the switching device of the present invention will be described based on the illustrated examples. In each figure, the same reference numerals are used for the same components.

Example

[0018] FIG. 1 and FIG. 2 show Embodiment 1 of the opening / closing device of the present invention. In this embodiment, the earthing switch includes a high-speed operating earthing switch, and the earthing switch including the high-speed operating earthing switch will be described. The description of the high-speed operating earthing switch will be omitted.

[0019] As shown in FIG. 1, the circuit breaker 12 and the earthing switch 11 are electrically connected to each other via a connection part 18. The circuit breaker 12 includes three-phase U-phase circuit breaker 12a, V-phase circuit breaker 12b, and W-phase circuit breaker 12c. On the other hand, the earthing switch 11 includes three-phase U-phase earthing switch 11a, V-phase earthing switch 11b, and W-phase earthing switch 11c.

[0020] The three phases of the three-phase U-phase circuit breaker 12a, V-phase circuit breaker 12b, and W-phase circuit breaker 12c all have the same configuration and are arranged in a line with each other as shown in FIG. 1. Similarly, the three phases of the three-phase U-phase earthing switch 11a, V-phase earthing switch 11b, and W-phase earthing switch 11c all have the same configuration and are arranged in a line with each other as shown in FIG. 1.

[0021] In addition, both the above-described circuit breaker 12 and earthing switch 11 can be arranged in different directions at a certain distance within a high-voltage substation and connected via various connection modules.

[0022] The circuit breaker 12 is provided with an operator 15 for the circuit breaker, and the earthing switch 11 is provided with an operator 16 for the earthing switch. The circuit breaker 12 and the earthing switch 11 can perform opening / closing operations via the operator 15 for the circuit breaker and the operator 16 for the earthing switch, respectively.

[0023] In addition, a mechanical interlock mechanism 13 is provided between the circuit breaker 12 and the earthing switch 11.​​​​​ are provided. Each operator (the breaker operator 15 and the earthing switch operator 16) has at least one output shaft (not shown), and the breaker operator 15 and the earthing switch operator 16 are directly attached to, for example, the phases of the U-phase breaker 12a and the U-phase earthing switch 11a via the output shaft respectively.

[0024] Thus, one of the output shafts from the breaker operator 15 and the earthing switch operator 16 is directly connected to the U-phase breaker 12a and the U-phase earthing switch 11a to transmit the operating motion thereof. The second output shaft from the breaker operator 15 is connected to a first transmission shaft 17 that transmits the operating motion to the V-phase breaker 12b via a first gear box 21 attached to the V-phase breaker 12b .. Furthermore, the operating force of the breaker operator 15 is transmitted to the first transmission shaft 17 via a second transmission shaft 22 with less movement than the first transmission shaft 17 and the first transmission shaft 17, and further, the operating motion of the W-phase breaker 12c is transmitted via a breaker interlock mechanism 131 connected between the first gear box 21 of the V-phase breaker 12b and the second gear box 23 of the W-phase breaker 12c.

[0025] Note that for the earthing switch 11, since the arrangement of the operating mechanisms and link mechanisms of the U-phase earthing switch 11a, the V-phase earthing switch 11b, and the W-phase earthing switch 11c is the same as that of the U-phase breaker 12a, the V-phase breaker 12b, and the W-phase breaker 12c of the breaker 12, the operation can be transmitted in the same manner as the breaker 12. .. .. .. ..

[0026] Note that for the earthing switch 11, since the arrangement of the operating mechanisms and link mechanisms of the U-phase earthing switch 11a, the V-phase earthing switch 11b, and the W-phase earthing switch 11c is the same as that of the U-phase breaker 12a, the V-phase breaker 12b, and the W-phase breaker 12c of the breaker 12, the operation can be transmitted in the same manner as the breaker 12. .. .. ..

[0027] Next, the interlocking function from the disconnector 12 to the earthing switch 11 will be described.

[0028] When the disconnector operating device 15 performs a closing operation, the disconnector interlock mechanism 131 is activated, Between the disconnector interlock mechanism 131 and the earthing switch interlock mechanism 131' At least one flexible Bowden pull or push cable 13 to connect The operation is transmitted to the earthing switch interlock mechanism 131' via 2.

[0029] Finally, the earthing switch interlock mechanism 131' is connected to the earthing switch for performing a closing operation. The electrical and manual operation of the earthing switch operator 16 is interrupted. As a result, the fixed contact 20' and the movable contact 19' of the earthing switch 11 are disconnected as shown in FIG. , cannot be contacted.

[0030] That is, the disconnector interlock mechanism 131 and the earthing switch interlock mechanism 131' Both can block the switchgear during the closing movement of the operating mechanism and vice versa. be.

[0031] In addition, the flexible Bowden pull cable or push cable 133 is An operation command is sent from the interlock mechanism 131' to the disconnector interlock mechanism 131. do.

[0032] As shown in FIG. 2, the W-phase disconnector 12c and the W-phase earthing switch 11c are connected to each other via a connection part 18. The W-phase disconnector 12c is connected to the W-phase disconnector movable contact 19 and the W-phase disconnector movable contact 19. The W-phase earthing switch 11c is provided with a movable contact for the W-phase earthing switch, A contact 19' and a fixed contact 20' for the W-phase earthing switch are provided.

[0033] And the interlock mechanism 131 for the circuit breaker and the interlock mechanism 131 for the earthing switch ´ are connected via two Bowden cables or push cables 132, 133 to each other.

[0034] As described above, the W-phase circuit breaker 12c includes a movable contact 19 for the W-phase circuit breaker and a fixed contact 20 for the W-phase circuit breaker facing each other, and the W-phase earthing switch 11c includes a movable contact 19´ for the W-phase earthing switch and a fixed contact 20´ for the W-phase earthing switch facing each other. These are further connected to the ground potential and always have a potential of 0 V. connected to the ground potential and always have a potential of 0 V. connected to the ground potential and always have a potential of 0 V.

[0035] All three phases (U phase, V phase, W phase) of the circuit breaker 12 and the earthing switch 11 are provided with movable contacts and fixed contacts, and all three phases have the same arrangement configuration. The circuit breaker 12 has the movable contact 19 for the circuit breaker operated by the circuit breaker operating device 15 to perform an opening / closing operation with the fixed contact 20 for the circuit breaker, and the earthing switch 11 has the movable contact 19´ for the earthing switch operated by the earthing switch operating device 16 to perform an opening / closing operation with the fixed contact 20´ for the earthing switch. Also, at the connection part 18, the earthing switch 11 and the circuit breaker 12 are electrically connected via the conductor 21, and all three phases are similarly connected connected to the ground potential and always have a potential of 0 V. connected to the ground potential and always have a potential of 0 V. connected to the ground potential and always have a potential of 0 V. connected to the ground potential and always have a potential of 0 V. to each other. to each other.

[0036] When the circuit breaker operating device 15 shown in FIG. 1 performs a closing operation between the movable contact 19 for the circuit breaker and the fixed contact 20 for the circuit breaker, movement is transmitted to all three of the movable contacts 19 for the circuit breaker of the U-phase circuit breaker 12a, the V-phase circuit breaker 12b, and the W-phase circuit breaker 12c. All three movable contacts 19 for the circuit breaker can move toward the fixed contacts 20 for the circuit breaker of all three phases connected to the ground potential and always have a potential of 0 V. connected to the ground potential and always have a potential of 0 V. connected to the ground potential and always have a potential of 0 V.

[0037] Also, during the above-described closing operation of the circuit breaker 12, the three phases of the U-phase earthing switch 11a, V-phase earthing switch 11b, and W-phase earthing switch 11c all remain in the open state. The interlock mechanism 131 for the circuit breaker connected to the W-phase circuit breaker 12c operates even during the closing operation of the circuit breaker 12, and the operation is transmitted via the Bourdon cable or push cable 132 to the interlock mechanism 131' for the earthing switch related to the W-phase earthing switch 11c.

[0038] Since the interlock mechanism 131' for the earthing switch operates, it has a blocking configuration inside, and the movement of the second transmission shaft 22' (see FIG. 1) with less movement than the first transmission shaft 17' and the further movement of the first transmission shaft 17' can be blocked.

[0039] The above-described first transmission shaft 17' is blocked with respect to the operating operator 16 for the earthing switch. Therefore, even if the motor (not shown) inside the operator 16 for the earthing switch burns out, the closing operation of the earthing switch 11 cannot be performed, and the movable contacts 19' for the earthing switches of all three phases cannot move towards the fixed contacts 20' for the earthing switches.

[0040] Thus, the mechanical interlock mechanism 13 in this embodiment can block the switching device, and vice versa.

[0041] Note that when the mechanical interlock mechanism 13 provided with the Bourdon cables or push cables 132 and 133 is not provided, there is no mechanical interlock between the circuit breaker 12 and the earthing switch 11, and both the circuit breaker 12 and the earthing switch 11 may operate together. There is a situation where current flows from the fixed contact 20 of the circuit breaker and the fixed contact 20' of the earthing switch through the conductor 21 of the connection part 18 to the movable contact 19 of the circuit breaker and the movable contact 19' of the earthing switch. And it flows through.

[0042] Figure 3 shows the details of the state where the interlock mechanism 131 for the circuit breaker and the interlock mechanism 131' for the earthing switch are connected by two flexible Borden pull cables or push cables 132 and 133. And it shows the details of the state where they are connected.

[0043] Both the interlock mechanism 131 for the circuit breaker and the interlock mechanism 131' for the earthing switch are the same in size, shape and internal structure, that is, they have the same configuration. Also, both the Borden pull cables or push cables 132 and 133 have the same configuration, and they are connected between both the interlock mechanism 131 for the circuit breaker and the interlock mechanism 131' for the earthing switch. And they are connected.

[0044] The interlock mechanism 131 for the circuit breaker and the interlock mechanism 131' for the earthing switch are provided with an interlock device 1311 for the circuit breaker and an interlock device 1311' for the earthing switch. The interlock mechanism 131 for the circuit breaker and the interlock mechanism 131' for the earthing switch are provided with a cover 1312 for the interlock device for the circuit breaker and a cover 1312' for the interlock device for the earthing switch on both sides. And they are provided with a cover 1312 for the interlock device for the circuit breaker and a cover 1312' for the interlock device for the earthing switch.

[0045] The cover 1312 for the interlock device for the circuit breaker and the cover 1312' for the interlock device for the earthing switch are fixed to the interlock mechanism 131 for the circuit breaker and the interlock mechanism 131' for the earthing switch through screws (not shown).

[0046] Also, the interlock mechanism 131 for the circuit breaker and the interlock mechanism 131 for the earthing switch The flange 1313 and 1313' sides of '' are fastened by fixing the second gear box 23 of the W-phase circuit breaker 12c and the second gear box 23' of the W-phase earthing switch 11c through at least two screws (not shown).

[0047] Also, the interlock mechanism 131 for the circuit breaker and the interlock mechanism 131 for the earthing switch ' are provided with air holes 1310 and 1310' for air circulation, thereby avoiding the pressure difference inside and outside and reducing the resistance of the mechanism.

[0048] Figure 4 shows the state of the interlock mechanism 131 for the circuit breaker and the interlock mechanism 131' for the earthing switch when the circuit breaker 12 and the earthing switch 11 are open.

[0049] The interlock mechanism 131 for the circuit breaker and the interlock mechanism 131' for the earthing switch have the same configuration and each has a first pull lever 1314 and 1315. Also a second pull lever 1316 and 1317' are arranged near the first pull lever 1314 and 1315

[0050] Also, the interlock mechanism 131 for the circuit breaker consists of an interlock device 1311 for the circuit breaker having a trapezoidal spindle 1318 provided with a trapezoidal nut 1319. The trapezoidal spindle 1 318 is supported at both ends by a front bearing 1320 and a rear bearing 1327 Also, the trapezoidal nut 1319 protrudes toward the first pull lever 1314 side and has a cylindrical shape so that a roller 1 326 can be accommodated.

[0051] ​​​​Also, when the trapezoidal spindle 1318 rotates, the trapezoidal nut 1319 can travel on the trapezoidal spindle 1318. To restrict the rotational movement of the trapezoidal nut 1319 and transfer it into a translational movement, a guide rod 1322 is provided on the axis of the trapezoidal spindle 131 8 and inserted into a U-shaped groove 13191 (see Fig. 6) in the trapezoidal nut 1319. This guide rod 1322 is attached to the interlock device 1311 for the circuit breaker via two screws (not shown) provided at both ends.

[0052] Also, the pivot pin 1323 holds the second pull lever 1316 and the block lever 131 7 (see Fig. 6) respectively and is provided so as to enable rotational movement around its axis.

[0053] Also, to transmit the operation and achieve the interlock function, between the second pull lever 1316 of the interlock device 1311 for the circuit breaker and the second pull lever 1317' of the interlock mechanism 131' for the earthing switch, the above-mentioned Bowden cable or push cable 132 is provided.

[0054] Also, the first end bolt 13 21 provided on the Bowden cable or push cable 132 at one end for fixing the second pull lever 1316 of the interlock mechanism 131 for the circuit breaker, and the second end bolt 13 21' provided on the Bowden cable or push cable 132 at the other end for fixing the second pull lever 1317' of the interlock mechanism 131' for the earthing switch. This Bowden cable or push cable 132 has both the first and second end bolts 1321 and 1321' on both sides, which are associated using hex nuts. ​​​​​​ The lever can be fixed.

[0055] Also, to keep the second pull lever 1317' of the interlock mechanism 131' for the earthing switch in the unlocked position, a helical spring 1324 is provided that always compresses the second pull lever 1317' towards the interlock device 13111' for the earthing switch. towards the interlock device 13111' for the earthing switch. a helical spring 1324 is provided that always compresses the second pull lever 1317' towards the interlock device 13111' for the earthing switch.

[0056] Fig. 5 shows the interlocking mechanism between the circuit breaker 12 and the earthing switch 11. That is, Fig. 5 shows the state of the interlock mechanism 131 for the circuit breaker when the circuit breaker 12 is in the closed state and the state of the interlock mechanism 131' for the earthing switch when the earthing switch 11 is in the open state. when the circuit breaker 12 is in the closed state and the state of the interlock mechanism 131' for the earthing switch when the earthing switch 11 is in the open state. the state of the interlock mechanism 131' for the earthing switch when the earthing switch 11 is in the open state.

[0057] First, when a closing command is given to the circuit breaker operating device 15 shown in Fig. 1, the trapezoidal spindle 1318 rotates, and the trapezoidal nut 1319 moves from the open position at the center of the trapezoidal spindle 1318 towards the opposite side (the upper side in Fig. 5) of the flange 1313 of the interlock mechanism 131 for the circuit breaker. Then, the roller 1326 provided in the trapezoidal nut 1319 rotates and travels on the inclined surface 13161 formed on the second pull lever 1316 of the interlock device 1311 for the circuit breaker, pushing the second pull lever 1316 of the interlock device 1311 for the circuit breaker to rotate in the clockwise direction. and the trapezoidal nut 1319 moves from the open position at the center of the trapezoidal spindle 1318 towards the opposite side (the upper side in Fig. 5) of the flange 1313 of the interlock mechanism 131 for the circuit breaker. towards the opposite side (the upper side in Fig. 5) of the flange 1313 of the interlock mechanism 131 for the circuit breaker. Then, the roller 1326 provided in the trapezoidal nut 1319 rotates and travels on the inclined surface 13161 formed on the second pull lever 1316 of the interlock device 1311 for the circuit breaker pushing the second pull lever 1316 of the interlock device 1311 for the circuit breaker to rotate in the clockwise direction. to rotate in the clockwise direction.

[0058] Furthermore, when the second pull lever 1316 of the interlock device 1311 for the circuit breaker rotates, it pulls the first end bolt 1321 of the arcuate Bowden cable or push cable 132, and the arcuate Bowden cable or push cable 132 is pulled. it pulls the first end bolt 1321 of the arcuate Bowden cable or push cable 132, and the arcuate Bowden cable or push cable 132 is pulled.

[0059] Therefore, the second pull lever 1317' of the grounding switch interlock mechanism 131' is also , pulled from the second end bolt 1321' of the Bowden cable or push cable 132 connected thereto.

[0060] In this state, the second pull lever 13 17' of the grounding switch interlock mechanism 131' is parallel to the circuit breaker interlock device 13111, and this results in the lever being in the cut-off position.

[0061] Also, the helical spring 1324 is compressed as shown in FIG. 5, and the helical spring 1324 is assembled in the Bowden cable or push cable 132 and is disposed between the second pull lever 1317' of the grounding switch interlock mechanism 131' and the circuit breaker interlock device 1311.

[0062] In this state, when a closing command is given to the operating device 16 for the grounding switch shown in FIG. 1, an attempt is made to rotate the trapezoidal spindle 1318' of the grounding switch interlock mechanism 131', and further, an attempt is made to move the trapezoidal nut 1319' toward the side opposite to the flange 1313' of the grounding switch interlock mechanism 131'.

[0063] However, when the second pull lever 1317 ' of the grounding switch interlock mechanism 131' is in the blocked position and the trapezoidal nut surface 13211' contacts the second pull lever surface 13171' of the grounding switch interlock mechanism 131', the trapezoidal nut 1319' is not allowed to move toward the side opposite to the flange 1313' of the grounding switch interlock mechanism 131'.

[0064] In this situation, the motor of the operating device 16 for the earthing switch is blocked by the trapezoidal nut 1319´, and further rotation of the trapezoidal spindle 1318´ of the interlock mechanism 131´ for the earthing switch is blocked, so that the maximum torque for performing the closing operation by the motor is generated.

[0065] The motor of the operating device 16 for the earthing switch can generate the maximum torque, which can be transmitted on the second pull lever 1317´ of the interlock mechanism 131´ for the earthing switch via the second end bolt 1321´, and further, on the pivot pin 1323´, the same force as that of the second pull lever 1317´ of the assembled interlock mechanism 131´ for the earthing switch is transmitted and can rotate around its axis.

[0066] To transmit the higher force described above to the interlock device 1311´ for the earthing switch, as shown in FIG. 7, a stop portion is provided between the surface 13171´ of the second pull lever of the interlock mechanism 131´ for the earthing switch and the surface 13112´ of the interlock device 1311´ for the earthing switch.

[0067] To ensure the contact between the surface 13171´ of the second pull lever of the interlock mechanism 131´ for the earthing switch and the surface 13112´ of the interlock device 1311´ for the earthing switch described above, a gap 1317a is provided between the pivot pin 1323´ and the second pull lever 1317´ of the interlock mechanism 131´ for the earthing switch.

[0068] During the interlock shown in FIG. 5, the second pull lever 1317´ of the interlock mechanism 131´ for the earthing switch is on the surface 131 of the interlock device 1311´ for the earthing switch,​​​​​​​ Until it contacts the 12', the flange 1313' of the grounding switch interlock mechanism 131' slides a little in the opposite direction, and the second of the grounding switch interlock mechanism 131' has a stop portion within the pull lever 1317' so that the pivot pin 1323' does not contact the second pull lever 1317' of the grounding switch interlock mechanism 131'.

[0069] Therefore, there is always a gap 1317a between the pivot pin 1323' and the second pull lever 1317' of the grounding switch interlock mechanism 131'.

[0070] Also, even when the grounding switch interlock mechanism 131' is completely heated and burned out, the grounding switch 11 cannot be closed.

[0071] Because the interlock mechanism from the circuit breaker 12 to the grounding switch 11 has been described above, but the interlock from the grounding switch 11 to the circuit breaker 12 is that the circuit breaker interlock mechanism 1 31 and the grounding switch interlock mechanism 131' have the same configuration, so it functions in the same way as the interlock mechanism from the circuit breaker 12 to the grounding switch 11.

[0072] Fig. 6 shows a cross-section of the circuit breaker interlock mechanism 131.

[0073] As shown in Fig. 6, the circuit breaker interlock mechanism 131 has a pivot pin 1323 provided within the circuit breaker interlock device 1311, and rotates about the axis of this pivot pin 1323 to pull the second pull lever 1316 and the second pull lever 1317 of the circuit breaker interlock device 1311. perform a rotational movement.

[0074] Then, to reduce friction and avoid wear between the surfaces of the second pull levers 1316 and 1317 of the circuit breaker interlock device 1311 and the surface of the circuit breaker interlock device 1311, a thrust washer 1328 is provided within the pivot pin 1323. Also, protective seal rings 1325 for protecting against dust and water ingress are provided on the entire surface and both sides of the circuit breaker interlock mechanism 131. The same applies to the earthing switch interlock mechanism 131'.

[0075] Therefore, according to this embodiment, even if a mechanical interlock device is installed between the circuit breaker 12 and the earthing switch (including the high-speed operating earthing switch) 11, it is possible to surely prevent both from closing simultaneously without affecting the switch functions of the circuit breaker 12 and the earthing switch 11.

[0076] Note that the present invention is not limited to the above-described embodiments and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Also, it is possible to add the configuration of another embodiment to a part of the configuration of one embodiment or add the configuration of another embodiment. Further, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

Description of Reference Numerals

[0077] 11... Earthing switch, 11a... U-phase earthing switch, 11b... V-phase earthing switch, 11c... W-phase earthing switch, 12... Circuit breaker, 12a... U-phase circuit breaker, 12b... V-phase circuit breaker, 12c... W-phase circuit breaker Circuit breaker, 13... Mechanical interlock mechanism, 15... Operator for circuit breaker, 16... Operator for earthing switch Operator, 17, 17´... First transmission shaft, 18... Connection part, 19... Moving contact of circuit breaker, 1 9´... Moving contact of earthing switch, 20... Fixed contact of circuit breaker, 20´... Fixed contact of earthing switch , 21... First gear box, 22, 22´... Second transmission shaft, 23, 23´... Second gear box, 24... Fourth additional branch bus, 25... Fifth additional branch bus, 26... Sixth additional branch bus, 131... Interlock mechanism for circuit breaker, 131´... Interlock for earthing switch lock mechanism, 132, 133... Bowden cable or push cable, 1310, 1310´... Air hole, 1311... Interlock device for circuit breaker, 1311´... Earthing switch interlock device, 1312... Cover for interlock device of circuit breaker, 1312´... Cover for interlock device of earthing switch, 1313... Flange of interlock mechanism for circuit breaker , 1313´... Flange of interlock mechanism for earthing switch, 1314, 1315 ... First pull lever, 1316, 1317´... Second pull lever, 1317... Block le ver, 1317a... Gap, 1318, 1318´... Trapezoidal spindle, 1319, 13 19´... Trapezoidal nut, 1320... Front bearing, 1321... First end bolt, 132 1´... Second end bolt, 1322... Guide rod, 1323, 1323´... Pivot pi n, 1324... Helical spring, 1325... Protective seal ring, 1326... Roller, 1327... Rear bearing, 13111... Interlock device for circuit breaker, 13111´... Earthing switch interlock device, 1312... Cover for interlock device of circuit breaker, 1312´... Earthing switch interlock device, 13112´... Exterior of earthing switch interlock device surface, 13171´… second prelever surface, 13191… U-shaped groove, 13211´… trapezoid nut surface.

Claims

1. An opening and closing device in which a circuit breaker and an earthing switch are electrically connected via a connection part, and each of the circuit breaker and the earthing switch is provided with an interlock device for interrupting an opening and closing operation, characterized in that the interlock device of the circuit breaker and the interlock device of the earthing switch are connected via a Bowden cable or a push cable.

2. The opening and closing device according to Claim 1, wherein the circuit breaker comprises a U-phase circuit breaker, a V-phase circuit breaker and a W-phase circuit breaker, while the earthing switch comprises a U-phase earthing switch, a V-phase earthing switch and a W-phase earthing switch, and the three phases of the U-phase circuit breaker, the V-phase circuit breaker and the W-phase circuit breaker all have the same configuration and are arranged in a row with each other, and the three phases of the U-phase earthing switch, the V-phase earthing switch and the W-phase earthing switch all have the same configuration and are arranged in a row with each other.

3. The opening and closing device according to Claim 2, wherein the circuit breaker is provided with an operator for the circuit breaker, and the earthing switch is provided with an operator for the earthing switch, the circuit breaker and the earthing switch are each subjected to an opening and closing operation via the operator for the circuit breaker and the operator for the earthing switch, and a mechanical interlock mechanism is provided between the circuit breaker and the earthing switch.

4. The opening and closing device according to Claim 3, wherein each of the three phases (U-phase, V-phase, W-phase) of the circuit breaker and the earthing switch is provided with a movable contact and a fixed contact, in the circuit breaker, the movable contact of each phase is operated by the operator for the circuit breaker to perform an opening and closing operation with the fixed contact of each phase, and in the earthing switch, the movable contact of each phase is operated by the operator for the earthing switch to perform an opening and closing operation with the fixed contact of each phase.

5. The opening and closing device according to Claim 4, wherein the operator for the circuit breaker and the operator for the earthing switch each have at least one output shaft, and the operator for the circuit breaker and the operator for the earthing switch are respectively attached to the circuit breaker of each phase and the earthing switch of each phase via the output shaft.

6. The opening and closing device according to Claim 5, wherein one of the output shafts from the operator for the circuit breaker and the operator for the earthing switch ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ is connected to one of the phases of the U-phase circuit breaker and the U-phase earthing switch, and the circuit breaker The second output shaft from the operating device for the circuit breaker and the operating device for the earthing switch is connected to the V-phase circuit breaker and is connected to a first transmission shaft that transmits motion to the V-phase circuit breaker and the above-mentioned V-phase earthing switch via a first gear box attached to the above-mentioned V-phase earthing switch and the above-mentioned V-phase earthing switch Furthermore, it is transmitted to the W-phase circuit breaker and the W-phase earthing switch via a second transmission shaft with less motion than the first transmission shaft, and the V-phase circuit breaker and the V-phase earthing switch The first gear box and the second gear box of the W-phase circuit breaker and the W-phase earthing switch The circuit breaker interlock mechanism and the earthing switch interlock mechanism connected between the above and An opening / closing device characterized in that motion is transmitted through

7. The opening / closing device according to claim 6, wherein when the operating device for the circuit breaker performs a closing operation, the circuit breaker interlock mechanism operates, and the above-mentioned An opening / closing device characterized in that the operation is transmitted to the earthing switch interlock mechanism via the Bowden cable or push cable connecting the circuit breaker interlock mechanism and the earthing switch interlock mechanism

8. The opening / closing device according to claim 7, wherein the circuit breaker interlock mechanism and the earthing switch interlock mechanism have the same configuration and the Bowden cable or push cable also has the same configuration, and the Bowden cable or push cable connects the circuit breaker interlock mechanism and the above-mentioned An opening / closing device characterized in that it connects the earthing switch interlock mechanism

9. The opening / closing device according to claim 8, wherein the circuit breaker interlock mechanism includes a circuit breaker interlock device, and the earthing switch interlock mechanism includes an earthing switch interlock device. The circuit breaker interlock mechanism and the earthing switch interlock mechanism are provided with covers for the circuit breaker interlock device and the earthing switch interlock device on both sides, and The cover for the circuit breaker interlock device and the cover for the earthing switch interlock device are fixed to the circuit breaker interlock mechanism and the earthing switch interlock mechanism via screws. An opening / closing device characterized by this

10. The opening / closing device according to claim 9, wherein the circuit breaker interlock mechanism includes a circuit breaker interlock device, the earthing switch interlock mechanism includes an earthing switch interlock device, the circuit breaker interlock mechanism and the earthing switch interlock mechanism are provided with covers for the circuit breaker interlock device and the earthing switch interlock device on both sides, and The cover for the circuit breaker interlock device and the cover for the earthing switch interlock device are fixed to the circuit breaker interlock mechanism and the earthing switch interlock mechanism via screws. An opening / closing device characterized by this

11. The opening / closing device according to claim 10, wherein the circuit breaker interlock mechanism includes a circuit breaker interlock device, the earthing switch interlock mechanism includes an earthing switch interlock device, the circuit breaker interlock mechanism and the earthing switch interlock mechanism are provided with covers for the circuit breaker interlock device and the earthing switch interlock device on both sides, and The cover for the circuit breaker interlock device and the cover for the earthing switch interlock device are fixed to the circuit breaker interlock mechanism and the earthing switch interlock mechanism via screws. An opening / closing device characterized by this

12. The opening / closing device according to claim 11, ​ The interlock mechanism for the circuit breaker and the interlock mechanism for the earthing switch are provided with air holes for air circulation. An opening and closing device characterized in that.

11. The opening and closing device according to claim 10, The interlock mechanism for the circuit breaker and the interlock mechanism for the earthing switch each have a first pull lever, and a second pull lever is arranged near the first pull lever. The interlock mechanism for the circuit breaker is composed of an interlock mechanism for the circuit breaker having a trapezoidal spindle provided with a trapezoidal nut. The trapezoidal spindle is supported at both ends by a front bearing and a rear bearing ring. The trapezoidal nut protrudes toward the first pull lever side and has a cylindrical shape so that a roller can be accommodated. An opening and closing device characterized by that.

12. The opening and closing device according to claim 11, When the trapezoidal spindle rotates, the trapezoidal nut travels on the trapezoidal spindle, and a guide rod for restricting the rotational movement of the trapezoidal nut and moving it into a translational movement is provided on the axis of the trapezoidal spindle. It is inserted into a U-shaped groove formed in the trapezoidal nut. The guide rod is attached to the interlock mechanism for the circuit breaker via two screws provided at both ends, and pivot pins for holding the second pull lever and the block lever are provided so as to be rotatable around their axes. An opening and closing device characterized by that.

13. The opening and closing device according to claim 12, A first end bolt installed on the cable or push cable of the board at one end for fixing the second pull lever of the interlock mechanism for the circuit breaker, and the cable or push cable of the board at the other end for fixing the second pull lever of the interlock mechanism for the earthing switch. A second end bolt installed on the cable, and the first and second end bolts on both sides of the cable or push cable of the board are fixed to the lever using hex nuts. An opening and closing device characterized by that.

14. The opening and closing device according to claim 13, In order to keep the second pull lever of the interlock mechanism for the earthing switch in the block release position, a helical spring that always compresses the second pull lever toward the interlock device for the earthing switch is provided. An opening and closing device characterized by that. ​ ​ ​ ​ ​

15. The opening and closing device according to claim 14, wherein a gap is provided between the pivot pin and the second pull lever of the grounding switch interlock mechanism. The opening and closing device is characterized by this.

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