Electric operating device for switch

Abstract

To suppress an increase in maintenance load and an increase in size of a device while taking a power failure countermeasure for completing closing to the last in an electric operation device of a switch.SOLUTION: The operation shaft 34 rotates the opening / closing shaft 22 of the switch 11 by rotation around the shaft to close the circuit. The motor 35 is rotated by electric power. The flywheel 36 is connected to the motor 35 and applies a rotational force to the motor 35 by inertia even if the power supply is interrupted during rotation. The power transmission mechanism 37 transmits the power of the motor 35 to the operation shaft 34.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to an electrically operated operating device for a switch. [Background technology]

[0002] Patent Document 1 discloses an electrically operated operating device that is provided in a switch and closes a circuit by driving a motor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4723900 Summary of the Invention [Problem to be solved by the invention]

[0004] If a power outage occurs during the closing operation and occurs just before the contacts are closed, arcing will continue, so one option would be to add a capacitor or drive the circuit with a solenoid instead of a motor so that the closing can be completed. However, capacitors require periodic replacement and solenoids are large. An object of the present invention is to prevent an increase in the maintenance load and an increase in the size of the device, while taking measures to prevent a power outage in an electrically operated switchgear so that closing is completed to the end. [Means for solving the problem]

[0005] An electric operating device for a switch according to one aspect of the present invention includes an operating shaft, a motor, a flywheel, and a power transmission mechanism. The operating shaft rotates around its axis to rotate the opening and closing shaft of the switch, thereby closing a circuit. The motor rotates using electric power. The flywheel is connected to the motor and provides rotational force to the motor by inertia even if a power outage occurs during rotation. The power transmission mechanism transmits the power of the motor to the operating shaft. [Effects of the Invention]

[0006] According to the present invention, even if a power outage occurs during the closing operation, the motor continues to rotate using the flywheel, allowing the closing operation to continue. Therefore, there is no need to add a capacitor or drive the motor with a solenoid. In other words, it is possible to take measures to complete the closing operation in the event of a power outage while suppressing increases in maintenance load and equipment size. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. 10 is a diagram showing the electrically operated operating device with the actuator energized. [Figure 13] FIG. 1 is a diagram illustrating the principle of continuous meshing of gears. [Figure 14] FIG. 10 is a diagram showing an electrically operated operating device in a closed state. [Figure 15] FIG. 2 is a block diagram of an electric operating device. [Figure 16] 10 is a flowchart showing a supply control process. [Figure 17] FIG. [Figure 18]10 is a flowchart showing a supply control process. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the drawings are schematic and may differ from the actual product. Furthermore, the following embodiments exemplify devices and methods for embodying the technical concept of the present invention, and are not intended to limit the configuration to the following. In other words, the technical concept of the present invention can be modified in various ways within the technical scope described in the claims.

[0009] First Embodiment "composition" In the following description, the three mutually orthogonal directions will be referred to as the width direction, depth direction, and up-down direction for the sake of convenience. FIG. 1 is a diagram showing the switch 11 in an interrupted state. Here, the switch 11 is shown as viewed from one side in the width direction, from the front side in the depth direction, and from above in the up-down direction. FIG. 2 is a diagram showing the switch 11 in the closed state. Here, the switch 11 is shown as viewed from one side in the width direction, from the front side in the depth direction, and from above in the up-down direction. The switch 11 is a load break switch (LBS) with a current-limiting fuse used to open and close high-voltage equipment and electrical circuits such as transformers and capacitors, and is equipped with a fixed contact 12, a movable contact 13, and an arc extinguishing chamber 14 for each pole.

[0010] The fixed contact 12 is not shown in the drawing because it is housed in an arc extinguishing chamber 14, but is connected to a primary side connection terminal 16 on the power supply side. The movable contact 13 is connected to a secondary connection terminal 18 on the load side via a current-limiting fuse 17, and rotates to come into contact with and separate from the fixed contact 12. The switch 11 is equipped with a handle 21. The handle 21 is connected to an opening / closing shaft 22 extending in the width direction. When the opening / closing shaft 22 rotates around its axis by operating the handle 21, the operating rod 23 is pushed and pulled by the crank mechanism, and the three-pole movable contact 13 rotates in conjunction with it. The arc-extinguishing chamber 14 accommodates the fixed contact 12 and extinguishes the arc when it is interrupted by a narrow gap in the width direction. The switch 11 is provided with an electric operating device 31 that electrically operates the opening / closing shaft 22. The electric operating device 31 is supported by a pair of frame plates 32 and 33, and electrically operates the opening / closing shaft 22 to close the circuit.

[0011] FIG. 3 is a diagram showing the arc-extinguishing chamber 14. As shown in FIG. This figure shows a cross section of the arc extinguishing chamber 14 along the width and depth directions, as viewed from above in the vertical direction. The arc extinguishing chamber 14 is made of insulating resin. A narrow gap slightly larger than the plate thickness of the movable contactor 13 is formed at the front of the arc extinguishing chamber 14 in the depth direction. The fixed contactor 12 is housed at the rear of the arc extinguishing chamber 14 in the depth direction and is fixed to the connection terminal 16. The fixed contactor 12 is made of conductive metal and is formed by bending a single plate material. When viewed from the top and bottom, the fixed contactor 12 has a roughly U-shape that opens toward the front in the depth direction. The tip ends of both ends are bent back in the depth direction by a U-shape to form a pair of elastic pieces facing each other in the width direction. When no external load is applied, the gap between the elastic pieces is slightly smaller than the thickness of the movable contactor 13.

[0012] FIG. 4 is a diagram showing the arc-extinguishing chamber 14 and the movable contact 13. As shown in FIG. Here, the arc extinguishing chamber 14 and the movable contactor 13 are shown as viewed from one side in the width direction. The arc extinguishing chamber 14 is shown as a cross section passing through the center of the width direction and along the depth direction and the up-down direction, as viewed from one side in the width direction. The movable contactor 13 is plate-shaped along the depth direction and the up-down direction, and is formed in a substantially V-shape when viewed from the width direction. The movable contactor 13 has a boss hole 26 formed at its base end and a connecting hole 27 formed at a position radially outward from the boss hole 26. The boss hole 26 penetrates in the width direction, and a rotation shaft (not shown) is inserted through the boss hole 26. The connecting hole 27 also penetrates in the width direction, and an operating rod 23 is connected to the connecting hole 27. The movable contactor 13 rotates around the boss hole 26 as the operating rod 23 retreats in the depth direction. When the tip of the movable contactor 13 is inserted into the fixed contactor 12, the movable contactor 13 closes the contacts and closes the circuit.

[0013] Next, the electric operating device 31 will be described. FIG. 5 is a diagram showing the electric operating device 31. As shown in FIG. Here, the electric operating device 31 is shown as viewed from one side in the width direction, from the front side in the depth direction, and from above in the up-down direction. FIG. 6 is a diagram showing the electric operating device 31. As shown in FIG. Here, the electric operating device 31 is shown as viewed from the other side in the width direction, the front side in the depth direction, and from above in the up-down direction. The frame plate 32 is a flat plate extending in the depth direction and the up-down direction, and a frame plate 33 is fixed to the surface facing the other side in the width direction. The frame plate 33 is formed with a flat plate extending in the depth direction and the up-down direction.

[0014] The electric operating device 31 includes an operating shaft 34 , a motor 35 , a flywheel 36 , and a power transmission mechanism 37 . FIG. 7 is a diagram showing the electric operating device 31. As shown in FIG. Here, the electric operating device 31 is shown without the frame plates 32 and 33, as viewed from the other side in the width direction, the front side in the depth direction, and from above in the up-down direction. FIG. 8 is a diagram showing the electric operating device 31. As shown in FIG. Here, the electric operating device 31 is shown, with the frame plates 32 and 33 omitted, as viewed from one side in the width direction, from the rear in the depth direction, and from below in the vertical direction. FIG. 9 is a diagram showing the electric operating device 31. As shown in FIG. Here, the electric operating device 31 is shown without the frame plates 32 and 33, as viewed from the front in the depth direction. FIG. 10 is a diagram showing the electric operating device 31. As shown in FIG. Here, the electric operating device 31 is shown as viewed from the other side in the width direction, with the frame plates 32 and 33 omitted. The hidden gears are shown with simplified pitch circles.

[0015] The operating shaft 34 extends in the width direction and is rotatably supported by the frame plate 32, with an operating lever 41 connected to it on one side of the frame plate 32 in the width direction. When the operating shaft 34 rotates around its axis, the operating lever 41 pushes up the handle 21, thereby rotating the opening / closing shaft 22. The opening / closing shaft 22 and the operating shaft 34 are arranged coaxially. The motor 35 is an electric motor that rotates using electricity, and is fixed to a surface of the frame plate 32 facing one side in the width direction, and has a rotation shaft that penetrates the frame plate 32 and extends to the other side in the width direction. The flywheel 36 is formed in a disk shape that extends in the depth direction and the up-down direction, and is connected to the rotation shaft of the motor 35. The flywheel 36 stores kinetic energy by the moment of inertia as it rotates together with the motor 35, and provides rotational force to the motor 35 even if a power outage occurs during rotation.

[0016] The power transmission mechanism 37 is a mechanism that transmits the power of the motor 35 to the operating shaft 34, and includes gears 51 to 56, a carrier 57, an actuator 58, a lever 59, and a cam 60. Gears 51 to 56 are all spur gears with tooth traces parallel to their axes. Gear 51 is a small gear and is connected to the rotating shaft of motor 35 on the other side of the width direction relative to flywheel 36. Gear 52 is a large gear that meshes with gear 51, and a rotating shaft 46 (support shaft) extending in the width direction is rotatably supported by frame plates 32 and 33. Gear 53 is a small gear and is connected to the rotating shaft 46 on the other side of the width direction relative to gear 52. Gear 54 is a large gear that meshes with gear 53, and a rotating shaft 47 extending in the width direction is rotatably supported by carrier 57. Gear 55 (drive gear) is a small gear and is connected to the rotating shaft 47 on the other side of the width direction relative to gear 54. Gear 56 (driven gear) is a large gear that can mesh with gear 55, and a rotating shaft 48 extending in the width direction is rotatably supported by frame plates 32 and 33. The axis Ax1 of the motor 35, the axis Ax2 of the rotating shaft 46, the axis Ax3 of the rotating shaft 47, the axis Ax4 of the rotating shaft 48, and the axis Ax5 of the operating shaft 34 are all parallel to each other. When viewed from the other side in the width direction, the motor 35, the flywheel 36, and the gear 51 rotate clockwise, the gears 52 and 53 rotate counterclockwise, and the gears 54 and 55 rotate clockwise.

[0017] The carrier 57 is formed in a roughly U-shape, and a pair of side plates that face each other in the width direction and that extend in the depth direction and up and down directions are rotatably supported by the rotation shaft 46. The carrier 57 rotatably supports the rotation shaft 47 at the upper side of the pair of side plates that is radially outward from the rotation shaft 46. Gears 52 to 55 are arranged between the pair of side plates of the carrier 57. A connecting pin 61 that extends in the width direction is supported at the lower side of the pair of side plates that is radially outward from the rotation shaft 46. When the carrier 57 rotates counterclockwise as viewed from the other side in the width direction, the gear 55 meshes with the gear 56. The actuator 58 is a solenoid that uses electricity to linearly move a plunger 62 extending in the depth direction in the axial direction. The plunger 62 has a tip formed in a bifurcated clevis shape and is connected to a connecting pin 61 of the carrier 57 via a connecting plate 63 extending in the depth direction. The actuator 58 linearly moves the plunger 62, thereby rotating the carrier 57 around the axis of the rotation shaft 46.

[0018] The lever 59 extends radially outward from the axis Ax5, is formed as a plate along the depth direction and the up-down direction, and is connected to the other end of the operating shaft 34. The cam follower 42 is rotatably supported on the lever 59 on the radially outward side of the surface facing the other width direction. The cam 60 extends radially outward from the axis Ax4, and is formed as a plate along the depth direction and the up-down direction. The cam follower 42 and the cam 60 are located at the same position in the width direction. The contour of the cam 60 includes a section that follows the base circle and a section that passes radially outward from the base circle. When the cam 60 is in its initial position before insertion, the section that follows the base circle is in contact with the cam follower 42. When the gear 55 engages with the gear 56 due to the rotation of the carrier 57, the gear 56 and the cam 60 rotate counterclockwise as viewed from the other width direction. When the section of the cam 60 that is radially outward from the base circle comes into contact with the cam follower 42, the lever 59 is lifted and the operating shaft 34 rotates clockwise. FIG. 11 is a diagram showing the actuator 58. As shown in FIG. (a) in the figure shows the actuator 58 when it is not energized. (b) in the figure shows the actuator 58 when it is energized. The actuator 58 is a pull type that advances the plunger 62 toward the front in the depth direction by the repulsive force of a spring when it is not energized, and retracts the plunger 62 toward the back in the depth direction by the attraction of electromagnetic force when it is energized.

[0019] 《Operation》 Next, the closing operation of the first embodiment will be described. First, actuator 58 is de-energized. As a result, as shown in Figure 10, plunger 62 is pushed out and moves forward in the depth direction, and carrier 57 reaches a disconnected position where gear 55 is disconnected from gear 56 when viewed from the other side in the width direction. When motor 35 is rotated in this state, inertial energy is stored in flywheel 36. The power of motor 35 is transmitted to gear 55 via gears 51, 52, 53, and 54 in this order, but is not transmitted to gear 56. Therefore, cam 60 maintains its initial position before insertion.

[0020] Then, when a predetermined time T1 (for example, 5 to 10 seconds) has elapsed since the motor 35 was started to rotate, electricity is applied to the actuator 58. As a result, the plunger 62 is attracted and retreats to the rear in the depth direction, causing the carrier 57 to rotate counterclockwise as viewed from the other side in the width direction, and to reach a connection position where the gear 55 is meshed with the gear 56. FIG. 12 is a diagram showing the electric operating device 31 with the actuator 58 energized. Here, the electric operating device 31 is shown as viewed from the other side in the width direction, with the gear 55 meshing with the gear 56. The hidden gears are drawn as simplified pitch circles. The power of the motor 35 is transmitted to the gear 56 via the gears 51, 52, 53, 54, and 55 in this order. As a result, the gear 56 and the cam 60 rotate counterclockwise when viewed from the other side in the width direction, and by lifting the lever 59, the operating shaft 34 starts to rotate clockwise.

[0021] If a power outage occurs during the closing operation, power to the motor 35 and the actuator 58 is cut off. The closing operation refers to the period from when gear 55 meshes with gear 56 and begins transmitting power from the motor 35 to the operating shaft 34 until the closing operation is completed. Even if a power outage occurs during this period, the motor 35 continues to rotate because the flywheel 36, which stores kinetic energy due to its moment of inertia, provides rotational force to the motor 35. The actuator 58 attempts to advance the plunger 62 as the attractive force disappears, but because gear 55 continues to mesh with gear 56 while transmitting power from gear 55 to gear 56, the carrier 57 is prevented from rotating clockwise as viewed from the other side in the width direction. Therefore, the carrier 57 remains in the connected position.

[0022] FIG. 13 is a diagram illustrating the principle by which the gears 55 continue to mesh. 1A shows an example of an arrangement in which the gear 55 continues to mesh. When viewed from the other side in the width direction, the gear 55 rotates clockwise, the gear 56 rotates counterclockwise, and the carrier 57 presses the gear 55 against the gear 56 counterclockwise around the axis Ax2. That is, the direction in which the carrier 57 (not shown) presses the gear 55 against the gear 56 is opposite to the rotation direction of the gear 55. As a result, a tangential force Ft acting toward the front in the depth direction acts on the gear 55, which acts as a force that rotates the carrier 57 counterclockwise around the axis Ax2. Therefore, while power is being transmitted from the gear 55 to the gear 56, the gear 55 does not separate from the gear 56, and the carrier 57 remains in the connected position. In this way, even if a power outage occurs during the closing operation, the motor 35 continues to rotate due to the flywheel 36, and the gear 55 continues to mesh with the gear 56, thereby allowing the closing operation to continue.

[0023] 1B shows an example of an arrangement in which the gear 55 cannot continue to mesh. When viewed from the other side in the width direction, the gear 55 rotates clockwise and the gear 56 rotates counterclockwise, and the direction in which the carrier 57 presses the gear 55 against the gear 56 around the axis Ax2 is clockwise. In other words, the direction in which the carrier 57 (not shown) presses the gear 55 against the gear 56 is the same as the rotation direction of the gear 55. As a result, a tangential force Ft acting toward the front in the depth direction acts on the gear 55, which acts as a force that rotates the carrier 57 counterclockwise around the axis Ax2. Therefore, when the power supply to the actuator 58 is cut off, the carrier 57 cannot remain in the connected position, and the gear 55 separates from the gear 56.

[0024] FIG. 14 is a diagram showing the electrically operated operating device 31 in a closed state. Here, the closed electric operating device 31 is shown as seen from the other side in the width direction. The hidden gears are drawn as simplified pitch circles. When viewed from the other side in the width direction, the rotation of the gear 56 and the cam 60 causes the lever 59 to lift, and as the clockwise rotation of the operating shaft 34 progresses, the tip of the movable contact 13 is inserted into the gap between the elastic pieces of the fixed contact 12, resulting in a closed contact. When the rotation of the gear 56 and the cam 60 continues and the tip of the cam 60 disengages from the cam follower 42, the operating lever 41 and the lever 59 rotate counterclockwise by a predetermined angle due to their own weight, and the series of closing operations is completed.

[0025] FIG. 15 is a block diagram of the electric operating device 31. As shown in FIG. The electric operating device 31 includes a controller 71, a closing switch 72, and a completion detection switch 73. The controller 71 is configured by, for example, a microcomputer, and receives the detection signal from the on switch 72 and the detection signal from the completion detection switch 73, and executes the on control process described later to drive and control the motor 35 and the actuator 58. The closing switch 72 is an operation switch for executing closing, and is operated by an operator. When the closing switch 72 is operated, a detection signal of the closing switch 72 is input to the controller 71. The completion detection switch 73 detects the completion of the closing operation from the rotation angle of the lever 59 or the rotation angle of the cam 60. When the closing operation is completed, a detection signal from the completion detection switch 73 is input to the controller 71.

[0026] Next, the closing control process executed by the controller 71 will be described. FIG. 16 is a flowchart showing the supply control process. In step S101, it is determined whether or not a closing command has been issued. If the closing switch 72 has not been operated, it is determined that a closing command has not been issued, and the process returns to the main program. On the other hand, if the closing switch 72 has been operated, it is determined that a closing command has been issued, and the process proceeds to step S102. In step S102, the motor 35 is driven. In the next step S103, it is determined whether a predetermined time T1 has elapsed since the motor 35 was started to rotate. The time T1 is, for example, about 5 to 10 seconds. The process waits until the time T1 has elapsed, and when the time T1 has elapsed, it is determined that kinetic energy has been accumulated in the flywheel 36 due to the moment of inertia, and the process proceeds to step S104.

[0027] In step S104, the actuator 58 is energized to rotate the carrier 57 to the connection position, thereby causing the gear 55 to mesh with the gear 56. In the next step S105, it is determined whether the closing operation is completed. The process waits until the completion detection switch 73 detects the completion of the closing operation, and when the completion detection switch 73 detects the completion of the closing operation, the process proceeds to step S106. In step S106, the driving of the motor 35 is stopped. In the following step S107, the actuator 58 is de-energized and the carrier 57 is rotated to the disconnection position to separate the gear 55 from the gear 56, and then the process returns to the predetermined main program.

[0028] <<Action and Effect>> Next, the main effects of the first embodiment will be described. The electric operating device 31 of the switch 11 includes an operating shaft 34, a motor 35, a flywheel 36, and a power transmission mechanism 37. The operating shaft 34 rotates around its axis to rotate the opening / closing shaft 22 of the switch 11, thereby closing the circuit. The motor 35 is driven by electricity. The flywheel 36 is connected to the motor 35 and, even if a power outage occurs during rotation, provides rotational force to the motor 35 by inertia. The power transmission mechanism 37 transmits the power of the motor 35 to the operating shaft 34. As a result, even if a power outage occurs during the closing operation, the motor 35 continues to rotate via the flywheel 36, allowing the closing operation to continue. This eliminates the need to add a capacitor or use a solenoid instead of the motor 35. In other words, this system can prevent an increase in maintenance load and device size while taking measures to complete the closing operation in the event of a power outage.

[0029] The power transmission mechanism 37 includes a gear 55, a gear 56, a carrier 57, and an actuator 58. The gear 55 transmits power from the motor 35. The gear 56 transmits the power to the operating shaft 34. The carrier 57 is rotatably supported by the rotating shaft 46 and rotatably supports the gear 55 radially outward of the rotating shaft 46. The actuator 58 rotates the carrier 57 between an engagement position where the gear 55 meshes with the gear 56 and a disengagement position where the gear 55 is disengaged from the gear 56. This allows the gear 55 to be disengaged from the gear 56 until kinetic energy is accumulated in the flywheel 36, and then the gear 55 can be engaged with the gear 56 after kinetic energy is accumulated in the flywheel 36. In other words, because the closing operation is initiated after kinetic energy is accumulated, the closing operation can be completed even if a power outage occurs midway.

[0030] The actuator 58 is a solenoid that is directly actuated by electricity, which allows the rotational position of the carrier 57 to be easily changed. When the actuator 58 is de-energized, it sets the carrier 57 to the disconnected position, and when it is energized, it sets the carrier 57 to the connected position. This simplifies the drive control of the actuator 58 and reduces power consumption except when the gear 55 is meshed with the gear 56. The axes of gear 55, gear 56, and rotating shaft 46 are all parallel, and when viewed from the axial direction, the direction in which carrier 57 presses gear 55 against gear 56 around the support axis is opposite to the direction of rotation of gear 55. As a result, even if a power outage occurs after gear 55 has been meshed with gear 56 to begin transmitting power, gear 55 continues to mesh with gear 56, allowing the closing to be completed to the end.

[0031] The electric operating device 31 of the switch 11 includes a controller 71 that drives and controls the actuator 58. When closing the switch, the controller 71 rotates the motor 35 with the carrier 57 in the disconnect position, and when a predetermined time T1 has elapsed since the motor 35 started rotating, the controller 71 rotates the carrier 57 to the connect position. This allows the gear 55 to be disengaged from the gear 56 until kinetic energy is accumulated in the flywheel 36, and then the gear 55 can be engaged with the gear 56 after kinetic energy is accumulated in the flywheel 36. In other words, because the closing operation begins after kinetic energy is accumulated, the closing operation can be completed even if a power outage occurs midway.

[0032] When the insertion is completed, the controller 71 rotates the carrier 57 to the disconnect position, thereby preparing for the next insertion operation. In addition, the drive control of the actuator 58 is simplified, and power consumption can be reduced except when the gear 55 is meshed with the gear 56. The power transmission mechanism 37 includes a lever 59 and a cam 60. The lever 59 is connected to the operating shaft 34. The cam 60 is connected to the rotation shaft 48 of the gear 56, and the rotation of the gear 56 rotates the lever 59. The controller 71 detects that the insertion has been completed from the rotation angle of the lever 59 or the rotation angle of the cam 60. This makes it possible to easily detect that the insertion has been completed. The controller 71 may also be configured to detect that the insertion has been completed from the rotation angle of the handle 21 or the rotation angle of the operating lever 41. This makes it possible to easily detect that the insertion has been completed.

[0033] Next, a comparative example will be described. Here, a comparative example will be described in which the flywheel 36 and power transmission mechanism 37 are omitted and the power of the motor 35 is transmitted to the operating shaft 34. Other configurations are the same as those of the first embodiment, so detailed descriptions of the common configurations will be omitted. If a power outage occurs during the closing operation and occurs immediately before closing, arcing will continue. Therefore, it is conceivable to add a capacitor or drive the motor 35 with a solenoid so that the closing operation can be completed. However, the capacitor requires periodic replacement, and the solenoid is large. This increases the maintenance load and increases the size of the device.

[0034] Second Embodiment "composition" The second embodiment shows a different aspect of the type and drive control of the actuator 58, and the other configurations are the same as those of the first embodiment described above, so detailed explanations of the common configurations will be omitted. FIG. 17 is a diagram showing the actuator 58. As shown in FIG. (a) in the figure shows the actuator 58 when it is not energized. (b) in the figure shows the actuator 58 when it is energized. The actuator 58 is a push type that moves the plunger 62 backward in the depth direction by the repulsive force of a spring when it is not energized, and moves the plunger 62 forward in the depth direction by the attraction of electromagnetic force when it is energized.

[0035] Next, the closing control process executed by the controller 71 will be described. FIG. 18 is a flowchart showing the supply control process. In step S111, it is determined whether or not a closing command has been issued. If the closing switch 72 has not been operated, it is determined that a closing command has not been issued, and the process returns to the main program. On the other hand, if the closing switch 72 has been operated, it is determined that a closing command has been issued, and the process proceeds to step S112. In step S112, the actuator 58 is energized to rotate the carrier 57 to the disconnect position, thereby disconnecting the gear 55 from the gear 56. In the following step S113, the motor 35 is driven.

[0036] In the next step S114, it is determined whether a predetermined time T1 has elapsed since the motor 35 was started to rotate. The time T1 is, for example, about 5 to 10 seconds. The process waits until the time T1 has elapsed, and when the time T1 has elapsed, it is determined that kinetic energy has been accumulated in the flywheel 36 due to the moment of inertia, and the process proceeds to step S115. In step S115, the actuator 58 is de-energized, and the carrier 57 is rotated to the connection position, thereby causing the gear 55 to mesh with the gear 56. In the next step S116, it is determined whether the closing operation is completed. The process waits until the completion detection switch 73 detects the completion of the closing operation, and when the completion detection switch 73 detects the completion of the closing operation, the process proceeds to step S117. In step S117, the driving of the motor 35 is stopped.

[0037] In the following step S118, the actuator 58 is energized to rotate the carrier 57 to the disconnect position, thereby disconnecting the gear 55 from the gear 56. In the following step S119, it is determined whether the motor 35 has stopped. Whether the motor 35 has stopped is determined based on, for example, the rotation angle of the motor 35 or the time since the motor 35 was stopped. The process waits until the motor 35 has stopped, and when the motor 35 has stopped, the process proceeds to step S120. In step S120, the actuator 58 is de-energized, and the carrier 57 is rotated to the connection position to bring the gear 55 into mesh with the gear 56, and then the process returns to the predetermined main program.

[0038] <<Action and Effect>> Next, the main effects of the second embodiment will be described. The actuator 58 places the carrier 57 in the disconnect position when energized, and places the carrier 57 in the connect position when de-energized. This ensures that the gear 55 can be meshed with the gear 56 even in the event of a power outage. The axes of gear 55, gear 56, and rotation shaft 46 are all parallel, and the direction in which carrier 57 presses gear 55 against gear 56 around the support axis as viewed from the axial direction is either the same as or opposite to the rotation direction of gear 55. This eliminates restrictions on the direction in which gear 55 is pressed against gear 56, improving the degree of freedom in layout. In other words, even in the example arrangement shown in Figure 13(b), gear 55 can reliably mesh with gear 56 in the event of a power outage. Other effects brought about by the common configuration are the same as those of the first embodiment described above.

[0039] Although the present invention has been described with reference to a limited number of embodiments, the scope of the invention is not limited to these embodiments, and modifications of the embodiments based on the above disclosure will be obvious to those skilled in the art. Furthermore, the embodiments and modifications can be adopted in any combination. [Explanation of symbols]

[0040] 11...switch, 12...fixed contact, 13...movable contact, 14...arc extinguishing chamber, 16...connecting terminal, 17...current-limiting fuse, 18...connecting terminal, 21...handle, 22...opening / closing shaft, 23...operating rod, 26...boss hole, 27...coupling hole, 31...electric operating device, 32...frame plate, 33...frame plate, 34...operating shaft, 35...motor, 36...flywheel, 37...power transmission mechanism, 41...operating lever, 42...cam follower, 46...rotating shaft, 47...rotating shaft, 48...rotating shaft, 51...gear, 52...gear, 53...gear, 54...gear, 55...gear, 56...gear, 57...carrier, 57...cam follower, 58...actuator, 59...lever, 60...cam, 61...connecting pin, 62...plunger, 63...connecting plate, 71...controller, 72...closing switch, 73...completion detection switch

Claims

1. an operating shaft that rotates around its axis to rotate an opening / closing shaft of the switch to close the circuit; a motor that rotates using electricity; a flywheel connected to the motor and adapted to provide a rotational force to the motor by inertia even if a power outage occurs during rotation; a power transmission mechanism that transmits the power of the motor to the operating shaft.

2. The power transmission mechanism includes: a drive gear to which the power of the motor is transmitted; a driven gear that transmits power to the operating shaft; a carrier that is rotatably supported by a support shaft and that rotatably supports the drive gear on the radially outer side of the support shaft; 2. The electrically operated operating device for a switch according to claim 1, further comprising: an actuator that rotates the carrier between a connection position where the drive gear meshes with the driven gear and a disconnection position where the drive gear is disconnected from the driven gear.

3. 3. The electrically operated switch operating device according to claim 2, wherein the actuator is a solenoid that is directly operated by electric power.

4. 4. The electrically operated switchgear according to claim 3, wherein the actuator moves the carrier to the disconnecting position when de-energized and moves the carrier to the connecting position when energized.

5. The driving gear, the driven gear, and the support shaft all have parallel axes, 5. The electrically operated switch according to claim 4, wherein the direction in which the carrier presses the drive gear against the driven gear around the support axis is opposite to the direction in which the drive gear rotates, as viewed from the axial direction.

6. 4. The electrically operated switchgear according to claim 3, wherein the actuator moves the carrier to the disconnecting position when energized and moves the carrier to the connecting position when de-energized.

7. The driving gear, the driven gear, and the support shaft all have parallel axes, 7. The electrically operated switch according to claim 6, wherein the direction in which the carrier presses the drive gear against the driven gear around the support axis, as viewed from the axial direction, is either the same as or opposite to the rotation direction of the drive gear.

8. a controller that controls the drive of the actuator; 3. The electric operating device for a switch according to claim 2, wherein the controller, when closing the switch, rotates the motor with the carrier in the breaking position, and when a predetermined time has elapsed since the motor started rotating, rotates the carrier to the connecting position.

9. 9. The electrically operated switchgear according to claim 8, wherein the controller rotates the carrier to the open position when the closing operation is completed.

10. The power transmission mechanism includes: a lever connected to the operating shaft; a cam connected to a rotation shaft of the driven gear and rotating the lever by rotation of the driven gear, 10. The electrically operated switch according to claim 9, wherein the controller detects completion of closing from the rotation angle of the lever or the rotation angle of the cam.

11. A handle connected to the opening / closing shaft; an operating lever connected to the operating shaft, 10. The electrically operated switch device according to claim 9, wherein the controller detects completion of closing from a rotation angle of the handle or a rotation angle of the operation lever.

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