Interlock structure of bypass power switching device

Abstract

The present invention relates to an interlocking structure of a bypass power switching device, including an automatic switching switch formed with a lever access portion, a bypass switch bypassing a normal power source or a standby power source and including a bypass lever, and an interlocking device capable of automatically closing the lever access portion. The interlocking device includes a main connector connected to the bypass lever and always descending toward the lower portion of the bypass lever, a lifting member linked with the main connector, an elastic connector rotatably attached to the lower portion of the lifting member and having an elastic force capable of rotating upward, and an opening and closing plate rotatably connected with the elastic connector and descending and ascending toward the lever access portion and opening and closing the lever access portion based on the rotating action of the elastic connector. When the power supply is bypassed through the bypass switch, the lever access portion is closed regardless of the type of the power source connected to the bypass switch to prevent manual switching of the automatic switching switch, and when the automatic switching switch is pulled out from a distribution board, the lever access portion is automatically opened.

Description

Technical Field

[0001] The present invention relates to an interlocking structure for a bypass power switching device, particularly in the case of bypass power supply, which physically prevents manual switching of the automatic switching switch, and the control lever connection can be automatically opened when the automatic switching switch is pulled out from the distribution panel. Background Technology

[0002] Generally, large buildings or factories obtain their normal power supply from power plants such as Korea Electric Power Corporation (KEPCO). Only when the normal power supply fails (e.g., a power outage) is an emergency power supply generated by internal generators. These large buildings or factories are equipped with automatic transfer switches (ATS). These ATS normally connect the normal power supply to the load side, supplying power. When the normal power supply fails, the backup power supply is connected to the load side, providing backup power. The ATS is connected in parallel with the main ATS. When one ATS fails, the ATS switches in parallel to supply power. A bypass power transfer device is also provided to facilitate maintenance and testing of the failed ATS.

[0003] like Figure 1 As shown, the bypass power switching device has an automatic transfer switch 10 and a bypass switch 20 installed inside the distribution panel 30, and as... Figure 2 As shown, the fixed terminals of each switch 10, 20 are connected in parallel to and arranged with common power supply terminals 10-1, 20-1 for supplying common power, backup power supply terminals 10-2, 20-2 for supplying backup power, and load terminals 10-3, 20-3 for supplying power to the load side. Switching of power supply terminals 10-1, 10-2, 20-1, 20-2 is performed via movable terminals 10-4, 20-4 on each automatic transfer switch 10, 20. Additionally, as... Figure 1 As shown, an operating lever access portion 10a is formed on the front of the automatic transfer switch 10. Management personnel can manually switch the power supply of the automatic transfer switch 10 by connecting the operating lever to the operating lever access portion 10a. Furthermore, during maintenance, repair, and testing of the automatic transfer switch 10 of the bypass power switching device, switching can be performed via the bypass switch 20 to ensure continuous power supply without interrupting the power supply to the load side.

[0004] However, the existing bypass power switching devices described above have the following problems:

[0005] First, in order to maintain, repair, and test the automatic transfer switch, the bypass switch 20 is switched to the normal power source or the standby power source, and then the management personnel or the operator can forget to switch the bypass switch 20, and thus the operating lever is manually switched to the operating lever insertion portion 10a to manually switch the power source of the automatic transfer device 10. In this case, the power supply device can be damaged, and a fire can be caused. That is, the bypass power switching device does not malfunction when the power source to which the bypass switch 20 is connected and the power source to which the automatic transfer switch is connected are the same, but if the operator inadvertently manually switches the power source of the automatic transfer switch through the operating lever insertion portion 10a in a state in which the power source to which the bypass switch 20 is connected and the power source to which the automatic transfer switch is connected are different, a serious accident can occur.

[0006] Second, the bypass power switching device has a problem in that, if the power source to which the bypass switch 20 is connected and the power source to which the automatic transfer switch 10 is connected are different, when the management personnel connects the power source through the bypass switch 20 after disconnecting the automatic transfer switch 10 from the distribution panel to perform a test or maintenance operation and then connects the original position of the distribution panel, the aforementioned accident can occur. That is, when the management personnel disconnects the automatic transfer switch 10 from the distribution panel 30 and connects the normal power source or the standby power source to the automatic transfer switch 10 to perform a test or maintenance operation, if the power source to which the automatic transfer switch 10 is connected and the power source to which the bypass switch 20 is connected are different when the operator connects the automatic transfer switch 10 to the original position of the distribution panel 30 after completing a series of operations, the device can be damaged, and a fire or the like can occur.

[0007] Prior Art Documents

[0008] Patent Documents

[0009] Patent Document 1: Korean Patent Registration No. 10-0844202 SUMMARY

[0010] Problems to be Solved

[0011] In view of the foregoing, the present application aims to provide an interlocking structure of a bypass power switching device in which, when a power source is bypassed by a bypass switch, an operating lever insertion portion of an automatic transfer switch is automatically closed, thereby preventing the automatic transfer switch from being manually switched from the root.

[0012] Means for Solving the Problem

[0013] In order to achieve the above object, the present application provides an interlocking structure of a bypass power switching device, comprising: an automatic switching switch, a through-hole type operating lever access portion for manually switching a normal power and a backup power being formed on the automatic switching switch; a bypass switch, the bypass switch being capable of bypassing the normal power or the backup power supplied to a load side through the automatic switching switch, and comprising a bypass operating lever for manually changing a bypass circuit; and an interlocking device, the interlocking device being configured to automatically close the operating lever access portion when the bypass operating lever is operated; wherein the interlocking device comprises: a main connector connected to the bypass operating lever and configured to always descend toward a lower portion of the bypass operating lever regardless of a rotating direction of the bypass operating lever when the bypass operating lever is rotated; a lifting member linked with a lifting action of the main connector; an elastic connector rotatably attached to a lower portion of the lifting member, the elastic connector having an elastic force capable of rotating the elastic connector toward the lifting member; and an opening and closing plate rotatably connected to the elastic connector and being lifted and lowered toward the operating lever access portion and opening and closing the operating lever access portion based on a rotating action of the elastic connector.

[0014] Optionally, a fixed support is provided on the automatic switching switch, one end of the elastic connector is rotatably connected to the fixed support through an elastic member, the other end of the elastic connector is rotatably connected to the opening and closing plate, and an attachment rod is protrusively formed from the elastic connector toward one side between the one end and the other end of the elastic connector, the attachment rod being attached to the lifting member.

[0015] Optionally, a bottom surface of the lifting member comprises a straight line portion and an inclined portion, the straight line portion being in contact with and pressing the attachment rod, and the inclined portion being inclined toward a front portion of the automatic switching switch from an end portion of the straight line portion.

[0016] Optionally, the main connector comprises: a first connector, one end of the first connector being rotatably connected to a lower portion of the bypass operating lever and rotating in a direction opposite to a rotating direction of the bypass operating lever around the one end; and a second connector, the second connector being rotatably connected between the other end of the first connector and the lifting member and being configured to rotate downward around the other end of the first connector when the first connector is rotated.

[0017] Invention effect

[0018] The interlocking structure of the bypass power switching device according to the present application automatically closes the lever insertion portion of the automatic switching switch when the bypass switch is used to bypass the power supply, thereby preventing the operator from manually switching the power supply of the automatic switching switch from the root. Therefore, the present application prevents the load side equipment from being damaged or a fire accident from occurring due to the difference between the bypass power supply and the power supply of the automatic switching device during the process of repairing or testing the automatic switching switch.

[0019] In addition, according to the present application, when the automatic switching switch is pulled out from the switchboard in the bypass power state, the opening and closing plate closing the lever insertion portion is raised, thereby having the effect of automatically opening the lever insertion portion when the automatic switching switch is pulled out from the switchboard. Therefore, according to the present application, the operator can easily change the power supply of the automatic switching switch pulled out from the switchboard, and further perform a test or the like. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of a bypass power switching device.

[0021] Figure 2 is a circuit structure diagram of a bypass power switching device.

[0022] Figure 3 is a schematic diagram showing the main part of the interlocking structure of a bypass power switching device according to a preferred embodiment of the present application from one side.

[0023] Figure 4 is a schematic diagram showing the main part of the interlocking structure of a bypass power switching device according to a preferred embodiment of the present application from the other side.

[0024] Figure 5 is an exploded view showing the main part of the interlocking structure of a bypass power switching device according to a preferred embodiment of the present application from the other side.

[0025] Figure 6a and Figure 6b shows the side view and front view of the interlocking structure of a bypass power switching device according to a preferred embodiment of the present application when the automatic switching switch is operated.

[0026] Figure 7 shows the side view of the interlocking structure of a bypass power switching device according to a preferred embodiment of the present application when the bypass switch is connected to the normal power supply.

[0027] Figure 8 shows the side view of the interlocking structure of a bypass power switching device according to a preferred embodiment of the present application when the bypass switch is connected to the standby power supply.

[0028] Figure 9This diagram illustrates the state of the automatic transfer switch being disconnected from the distribution panel when the power supply is connected to the backup power supply via a bypass switch.

[0029] Explanation of reference numerals in the attached figures

[0030] 10, Automatic switching switch; 10a, Control lever access part; 11, Fixed bracket; 211, Guide protrusion; 20, Bypass switch; 21, Bypass control lever; 22, Interlocking lever; 100, Main connector; 110, First connector; 120, Second connector; 200, Lifting component; 210, Guide plate; 211, Guide protrusion; 220, Guide hole; 411, Elongated hole; 230, Straight part; 240, Inclined part; 300, Elastic connector; 310, Attachment rod; 320, Elastic component (torsion spring); 400, Opening / closing plate; 410, Connecting part; 420, Covering part. Detailed Implementation

[0031] The terms and words used in this specification and claims are not limited to their usual or dictionary meanings, but should be interpreted as meanings and concepts consistent with the technical concept of the invention as defined by the inventors in order to best describe the invention, based on the principle that terms and concepts can be appropriately defined.

[0032] The following is for reference. Figures 3 to 9 The interlocking structure (hereinafter referred to as the interlocking structure) of the bypass power switching device according to a preferred embodiment of the present invention is described.

[0033] like Figure 3 As shown, in the bypass power switching device where the automatic transfer switch 10 and the bypass switch 20 are connected in parallel, the interlocking structure includes an interlocking device capable of closing the lever access portion 10a formed on the automatic transfer switch 10. The bypass switch 20 includes a bypass lever 21, which is used to change the access direction of the bypass switch 20, such as... Figure 6a , Figure 7 and Figure 8 As shown, the bypass lever 21 is located inside the distribution panel 30 and can rotate vertically. For example, when the bypass lever 21 is rotated upwards towards the distribution panel 30, the bypass switch 20 bypasses the main power supply; when the bypass lever 21 is rotated downwards towards the distribution panel 30, the bypass switch 20 bypasses the backup power supply. The bypass lever 21 includes a rotating shaft and an interlocking rod 22 that protrudes downwards in a straight line relative to the rotating shaft. The interlocking rod is used to connect with the main connector described later.

[0034] like Figures 3 to 5 As shown, the interlocking device includes: a main connector 100, a lifting component 200, a flexible connector 300, and an opening / closing plate 400.

[0035] likeFigure 4 As shown, the main connector 100 is provided between the bypass lever 21 and the lifting member 200 to transmit the rotating action of the bypass lever 21 to the opening and closing plate 400. The main connector 100 is rotatably connected to the interlocking lever 22 of the bypass lever 21, and always descends toward the lower side of the shaft of the bypass lever 21 regardless of the forward or reverse rotation of the bypass lever 21. Preferably, the main connector 100 is combined with two connectors, which are referred to as a first connector 110 and a second connector 120 for convenience of explanation. One end of the first connector 110 is rotatably connected to the interlocking lever 22 of the bypass lever 21, and rotates in the opposite direction with respect to the rotating direction of the bypass lever 21 about the one end. For example, as shown in Figure 7 When the bypass lever 21 is rotated in the counterclockwise direction, the first connector 110 is rotated in the clockwise direction, as shown in Figure 8 When the bypass lever 21 is rotated in the clockwise direction, the first connector 110 is rotated in the counterclockwise direction. The other end of the first connector 110 is rotatably connected to the second connector 120, and is rotatable about the other end of the first connector 110 toward the lower side of the panel 30. The second connector 120 is rotatably connected between the other end of the first connector 110 and the lifting member 200, and is rotatable about the other end of the first connector 110 toward the lower side of the panel 30 regardless of the rotating direction of the bypass lever 21.

[0036] The lifting member 200 is linked with the main connector 100 to rotate the elastic connector 300 described later toward the lower side. As shown in Figure 4 The lifting member 200 is linkably connected to the second connector 120, and is provided with the guide plate 210 to smoothly lift without deviating from the path. The guide plate 210 is provided at the inner side of the panel 30 to form a guide protrusion 211 for guiding the lifting path of the lifting member 200. At this time, since the lifting member 200 is formed with a long hole-shaped guide hole 220 corresponding to the guide protrusion 211, the lifting member 200 is lifted along the guide protrusion 211 on the guide plate 210. In addition, the bottom surface of the lifting member 200 is divided into a straight portion 230 and an inclined portion 240. The straight portion 230 is a portion for pressing the elastic connector 300 described later when the lifting member 200 is lifted, and is formed in a straight line with respect to the ground. The inclined portion 240 is a structure for naturally guiding the rotation of the elastic connector 300 to lift the opening and closing plate 400 when the automatic changeover switch 10 is pulled out from the panel 30, and will be described in detail later. As shown in Figure 4 and Figure 5 The inclined portion 240 is formed to be inclined toward the front of the panel 30 from the straight portion 230.

[0037] The flexible connector 300 is a structure used to directly raise and lower the opening / closing plate 400, rotating it through the raising and lowering action of the lifting member 200. The flexible connector 300 is installed on the automatic switching switch 10; more precisely, as... Figure 7 As shown, the automatic switching switch 10 is provided with a fixed bracket 11, and the resilient connector 300 is rotatable on the fixed bracket 11. One end of the resilient connector 300 is rotatably connected to the fixed bracket 11, and the other end of the resilient connector 300 is rotatably connected to the upper end of the opening / closing plate 400. Based on this structure where the other end rotates about one end on the fixed bracket 11, the resilient connector 300 raises and lowers the opening / closing plate 400 provided on the other end of the resilient connector 300. An attachment rod 310 is formed between one end and the other end of the resilient connector 300. The attachment rod 310 is a structure that attaches to the bottom surface of the lifting member 200, and substantially presses the resilient connector 300 when the lifting member 200 descends. The attachment rod 310 is formed protruding to one side on the resilient connector 300. In addition, one end of the resilient connector 300 is provided with a resilient member 320. The elastic member 320 provides a spring force for the rotation of the elastic connector 300. This spring force is a force applied that causes the elastic connector 300 to rotate toward the lifting member 200. That is, the elastic connector 300 provides a spring force to the lifting member 200 via the elastic member 320. According to the present invention, based on the structure of the elastic member 320, the opening / closing plate 400 can flexibly perform the function of closing the lever access portion 10a or returning to its original position. Preferably, the elastic member 320 is a torsion spring.

[0038] The opening / closing plate 400 functions to open and close the lever access portion 10a of the automatic transfer switch 10, such as... Figure 6a As shown, the opening / closing plate 400 is rotatably connected to the other end of the resilient connector 300. The opening / closing plate 400 is configured to move up and down toward the lever access portion 10a and can be linked with the rotation of the resilient connector 300. Preferably, the opening / closing plate 400 includes a connecting portion 410 and a blocking portion 420, the connecting portion 410 being connected to the resilient connector 300 and the blocking portion 420 closing the lever access portion 10a. At this time, an elongated hole 411 is formed on the connecting portion 410 along its length direction, and a guide protrusion is formed on the fixing bracket 11 that can be positioned in the elongated hole 411.

[0039] The operation of the interlocking structure with the above structure will be explained in detail below.

[0040] Figure 6a and Figure 6bThe side and front views show the automatic transfer switch 10 in its normal operating state when used for power supply. As can be seen, the bypass lever 21 is not connected to any power source of the bypass switch 20. Furthermore, it can be seen that the lever access portion 10a is in the open state, allowing for manual switching of the automatic transfer switch 10. In this state, when repairs, tests, or other operations are required on the automatic transfer switch 10, the operator bypasses the power supplied by the automatic transfer switch 10 via the bypass switch 20.

[0041] For example, such as Figure 7 As shown, the operator rotates the bypass lever 21 upwards to connect the main power supply from the automatic transfer switch 10 to the bypass switch 20. At this time, the bypass lever 21 rotates counterclockwise around its axis, and the first connector 110 rotates clockwise around the interlocking rod 22. Meanwhile, as the second connector 120 rotates horizontally downwards around the other end of the first connector 110, the lifting member 200 descends downwards along the guide plate 210.

[0042] As the lifting component 200 descends, the attachment rod 310 attached to the straight portion of the lifting component 200 is pressed down by the lifting component 200 and descends, ultimately, as... Figure 6a and Figure 7 As shown, the resilient connector 300 rotates around the fixed bracket 11, causing the other end to descend. At this time, the resilient connector 300 is pressed down by the lifting member 200, and in this state, the spring force of the torsion spring 320 applies a force to return it to its original position. As described above, as the other end of the resilient connector 300 descends based on its rotation, the opening / closing plate 400 connected to the other end of the resilient connector 300 descends and closes the lever access portion 10a.

[0043] in addition, Figure 8 This illustrates the state where the power supply is bypassed to the backup power supply by rotating the bypass lever 21, specifically when the operator rotates the bypass lever 21 clockwise. At this time, as... Figure 6a and Figure 8 As shown, the first connector 110 rotates counterclockwise around the interlocking rod 22, causing the second connector 120 to rotate clockwise. At this time, the second connector 120 and the first connector 110 form a straight line, and the other end of the second connector 120 descends, thereby causing the lifting member 200 to descend.

[0044] like Figure 7 Similarly, as the lifting member 200 descends, the attachment rod 310 attached to the straight portion of the lifting member 200 is pressed down by the lifting member 200 and descends, ultimately, as shown... Figure 6a and Figure 8As shown, the elastic connector 300 rotates around the fixed bracket 11, and the other end is lowered. At this time, the elastic connector 300 is in a state of being pressed by the lifting member 200, and in this state, the elastic force of the torsion spring 320 is applied to the force to return to the original position. As described above, as the other end of the elastic connector 300 is lowered based on the rotation of the elastic connector 300, the opening and closing plate 400 connected to the other end of the elastic connector 300 is lowered and closes the joystick access portion 10a.

[0045] As described above, according to the present application, when the rotary bypass joystick 21 is used to bypass supply the power source, the opening and closing plate 400 is automatically lowered and closes the joystick access portion 10a, so that in the state of bypassing the power source, regardless of the type of the power source to which the bypass joystick 21 is connected, the operator cannot manually switch the automatic switching switch 10 through the joystick access portion 10a.

[0046] In addition, Figure 9 In the state in which the operator bypasses the power source, in order to perform a test operation on the automatic switching switch 10, the automatic switching switch 10 is pulled out from the distribution panel 30, and the present application is characterized in that when the operator pulls out the automatic switching switch 10 from the distribution panel 30, the opening and closing plate 400 is automatically raised and opens the joystick access portion 10a. That is, according to the present application, in the state of bypassing the power source, when the automatic switching switch 10 is pulled out from the distribution panel 30, the joystick access portion 10a, which is in a closed state, is automatically opened, and the operator can switch the power source through the joystick access portion 10a to perform a test operation without performing other additional operations.

[0047] The series of processes will be described in detail below. Figure 8 and Figure 9

[0048] Figure 8 As shown, the elastic connector 300 rotates around the fixed bracket 11, and the other end is lowered. At this time, the elastic connector 300 is in a state of being pressed by the lifting member 200, and in this state, the elastic force of the torsion spring 320 is applied to the force to return to the original position. As described above, as the other end of the elastic connector 300 is lowered based on the rotation of the elastic connector 300, the opening and closing plate 400 connected to the other end of the elastic connector 300 is lowered and closes the joystick access portion 10a. Figure 9 ​As shown, the elastic connector 300 rotates upward at an angle corresponding to the inclined portion 240. As the elastic connector 300 rotates in the counterclockwise direction in the figure, the other end of the elastic connector 300 rises and causes the opening and closing plate 400 to rise, so that the lever access portion 10a is opened. Then, the operator can change the power supply of the automatic transfer switch 10 through the lever access portion 10a to perform a test operation. When the test operation on the automatic transfer switch 10 is completed, the operator pushes the automatic transfer switch 10 into the original position inside the switchboard 30, at which time the attachment rod 310 of the elastic connector 300 is guided and moved along the inclined portion 240, and since the opening and closing plate 400 is lowered again after reaching the straight portion 230, the lever access portion 10a is closed again when the automatic transfer switch 10 is accessed to the switchboard 30.

[0049] As described above, the interlocking structure of the bypass power supply switching device according to the present application automatically closes the lever access portion of the automatic transfer switch when bypassing the power supply, and automatically opens the lever access portion when the automatic transfer switch is pulled out of the switchboard in the bypass state. Therefore, the present application fundamentally prevents the manual switching of the automatic transfer switch in the bypass state to prevent safety accidents, and the lever access portion is automatically opened when the automatic transfer switch is pulled out of the switchboard, so as to facilitate the operation of the operator.

[0050] As described above, the specific embodiments of the present application are described in detail, and various modifications and changes can be made within the scope of the technical idea of the present application, which will be apparent to those skilled in the art, and such modifications and changes should be included in the scope of the claims of the present application.

Claims

1. An interlocking structure of a bypass power switching device, characterized by comprising: The bypass power supply switching device according to claim 1, wherein: the automatic switching switch has a through-hole type lever access portion for manually switching a main power supply and a backup power supply; a bypass switch is capable of bypassing the main power supply or the backup power supply supplied to a load side through the automatic switching switch, and includes a bypass lever for manually changing a bypass circuit; and an interlocking device is provided to automatically close the lever access portion when the bypass lever is operated. The interlocking device includes: a main connector connected to the bypass lever and configured to always descend toward a lower side of the bypass lever regardless of a direction in which the bypass lever is rotated when the bypass lever is rotated; a lifting member linked with a lifting action of the main connector; an elastic connector rotatably attached to a lower portion of the lifting member, the elastic connector having an elastic force capable of rotating the elastic connector toward the lifting member; and an opening and closing plate rotatably connected to the elastic connector and configured to lift and lower toward the lever access portion and open and close the lever access portion based on a rotating action of the elastic connector.

2. The interlocking structure of the bypass power supply switching device according to claim 1, wherein: the automatic switching switch has a fixed support provided thereon; one end of the elastic connector is rotatably connected to the fixed support through an elastic member; the other end of the elastic connector is rotatably connected to the opening and closing plate; and an attachment bar is protrusively formed from the elastic connector toward one side between the one end and the other end of the elastic connector, the attachment bar being attached to the lifting member.

3. The interlocking structure of the bypass power supply switching device according to claim 2, wherein: a bottom surface of the lifting member includes a straight portion and an inclined portion, the straight portion being in contact with and pressing the attachment bar, and the inclined portion being inclined toward a front side of the automatic switching switch from an end of the straight portion. The main connector includes: a first connector having one end rotatably connected to a lower portion of the bypass lever and being rotated in a direction opposite to a rotating direction of the bypass lever around the one end; and a second connector rotatably connected between the other end of the first connector and the lifting member and configured to be rotated downward around the other end of the first connector when the first connector is rotated. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 4. The interlocking structure of a bypass power switching device according to any one of claims 1 to 3, characterized in that, ​ ​ ​

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