Apparatus for monitoring state of swithing device with arches

Abstract

A state monitoring device for a switching device is disclosed that can improve the reliability of state monitoring of a disconnect switch using a magnetic sensor. The state monitoring device for the switching device is characterized by including a movable bracket fastened to a first fixed portion formed on the surface of the switching device, a fixed bracket fastened to a second fixed portion formed on the edge of the enclosure of an insulating switch, and a sensor that monitors the state of the switching device by sensing the operation of a link connecting a motor and a movable member installed within the switching device.

Description

Technology Field

[0001] The present invention relates to a state monitoring technology for a disconnect switch, and more specifically, to a device for monitoring the state of a switching device having an arch portion configured in an insulated switch. Background Technology

[0002] Work errors frequently occur during internal inspections (such as replacing motors or auxiliary relays) of 23kV GIS (Gas Insulated Switchgear) DS (Disconnect switch). Recently, the same failures related to the above have been occurring repeatedly, and in such cases, the failure spreads to the transformer, causing a power outage.

[0003] One cause of failure is misidentifying the open / closed status of the disconnect switch. Specifically, the link connecting the motor and the actuator becomes disconnected during internal inspection.

[0004] The operation of the disconnect switch is as follows.

[0005] ① When a Disconnect Switch (DS) closing command is issued, operation of the disconnect switch motor -> operation of the link (pulling) -> operation of the actuator inside the disconnect switch conductor through the inside of the disconnect switch conductor (downward) -> DS closing

[0006] ② When a disconnect switch (DS) opening command is given, operation of the disconnect switch motor -> operation of the link (mem) -> operation of the internal actuator of the disconnect switch conductor (upward) -> DS opens

[0007] The failures resulting from the above operation administration are explained as follows.

[0008] ① Disconnect the link and the disconnect switch operating motor to detach it from the device for repair due to a faulty disconnect switch operating motor.

[0009] ② After the maintenance of the disconnect switch operating motor is completed, the base must be reassembled and reconnected to the link; however, due to the worker's failure to connect and / or the supervisor's failure to verify, the actual operator (conductor) cannot execute the operation when the disconnect switch is switched on or off by command while the connection is unconnected.

[0010] ③ When a disconnect switch is closed or opened in an unconnected state, the actual operator's actions cannot be executed, leading to a misinterpretation of the open / closed status and causing a malfunction during the operation of other equipment.

[0011] In particular, a cause of failure is misidentification of the disconnect switch open / closed status (separation of the motor-actuator connecting link during internal inspection). Currently, the disconnect switch status detection is based on motor operation.

[0012] Currently, the status of the disconnect switch utilizes auxiliary (AUX) contacts based on motor operation. In other words, there is a problem in that status monitoring is performed independently of the actual operator's actions. Prior art literature

[0013] 1. Korean Utility Model Registration No. 20-0365572 (Registration Date: Oct. 12, 2004) The problem to be solved

[0014] The present invention is proposed to resolve the problems according to the background technology above, and aims to provide a switching device status monitoring device capable of improving the reliability of status monitoring of a switching device (disconnector or grounding switch) using a magnetic sensor.

[0015] In addition, the present invention has another objective of providing a status monitoring device for a switching device capable of indicating whether an operator is engaged based on the link rotation direction (disconnector engagement -> counterclockwise, earthing switch (ES) engagement -> clockwise).

[0016] In addition, the present invention has another objective of providing a state monitoring device for a switching device that can ensure the reliability of the power supply by preventing the possibility of operational errors at the source. means of solving the problem

[0017] To achieve the above-mentioned objectives, the present invention provides a state monitoring device for a switching device that can improve the reliability of state monitoring of a disconnect switch using a magnetic sensor.

[0018] The status monitoring device of the above-mentioned switching device is,

[0019] A movable bracket fastened and assembled to a first fixed portion formed on the surface of a switching device;

[0020] A fixing bracket fastened and assembled to a second fixing portion formed on the edge of the enclosure of an insulating switch; and

[0021] It is characterized by including a sensor that monitors the state of the switching device by sensing the operation of a link connecting a motor and an actuator installed within the switching device.

[0022] In addition, the sensor is characterized as being a magnetic sensor.

[0023] In addition, the movable bracket is fastened to the first fixed portion by a bolting method, and the fixed bracket is fastened to the second fixed portion by a bolting method.

[0024] In addition, one side of a portion of the upper surface of the fixed bracket is formed at a 90° angle, and the remaining side is open, and a support is formed on the remaining side for fastening and fixing with the first fixed part.

[0025] In addition, the lower end of the fixed bracket is characterized by having an arch formed therein to be aligned with a cylindrical protrusion formed on the surface of the switching device.

[0026] In addition, two of the fixed sensors are attached to the surface of the fixed bracket in a figure-eight shape.

[0027] In addition, the movable sensor among the above sensors is characterized by being attached to the rear of the movable bracket.

[0028] In addition, the above-mentioned movable bracket is characterized by having a “T” shape for left and right rotation.

[0029] In addition, the above-mentioned movable sensor is characterized by being attached to the rear of the “-” shape of the “T” shape.

[0030] The above-described movable sensor is characterized by having a coin-shaped form formed at the bottom of the “I” shape among the “T” shapes, having a round hole for fixing to the first fixed part.

[0031] In addition, the switching device is characterized as being a disconnection switch or an earthing switch.

[0032] On the other hand, another embodiment of the present invention provides a state monitoring device for a switching device, characterized by comprising: a movable bracket fastened to a first fixed portion formed on the surface of a switching device; a fixed bracket fastened to a second fixed portion formed on the edge of an insulating switchgear enclosure; a sensor that monitors the state of the switching device by sensing the operation of a link connecting a motor and a movable member installed within the switching device; and a monitoring lamp circuit that outputs the state using the sensor.

[0033] In addition, the above monitoring lamp circuit is characterized by including a wiring circuit breaker that blocks power flowing into the switching device under specific conditions.

[0034] In addition, the above-described monitoring lamp circuit is characterized by including a monitoring lamp that outputs the state as off or on. Effects of the invention

[0035] According to the present invention, the reliability of status monitoring of a disconnect switch using a magnetic sensor can be improved.

[0036] In addition, another advantage of the present invention is that it can indicate whether a mover is inserted according to the direction of link rotation.

[0037] In addition, another effect of the present invention is that it can reduce replacement costs (about 100 million won) in the event of a breakdown.

[0038] In addition, another advantage of the present invention is that it can prevent work errors caused by misidentification of the status of the disconnection switch (DS) and improve the reliability of power supply. Brief explanation of the drawing

[0039] FIG. 1 is a perspective view of a state monitoring device for a switching device utilizing a magnetic sensor according to an embodiment of the present invention. Figure 2 is a design drawing of a fixed bracket configured in the status monitoring device of the switching device shown in Figure 1. Figure 3 is a design drawing of a support for a status monitoring device of a switching device shown in Figure 1. Figure 4 is a design diagram of the operating bracket of the status monitoring device of the switching device shown in Figure 1. Figure 5 is a perspective view of the magnetic sensor shown in Figure 1. FIG. 6 is a monitoring lamp circuit related to the operation of a disconnection switch (DS) and an earthing switch (ES) according to an embodiment of the present invention. Figure 7 is a drawing showing the operating state of the monitoring lamp illustrated in Figure 6. Specific details for implementing the invention

[0040] The aforementioned objectives, features, and advantages will be described in detail below with reference to the attached drawings, and accordingly, a person skilled in the art to which the present invention pertains will be able to easily implement the technical concept of the present invention.

[0041] In describing the present invention, detailed descriptions of known technologies related to the present invention are omitted if it is determined that such descriptions could unnecessarily obscure the essence of the invention.

[0042] Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0043] A state monitoring device for a switching device according to an embodiment of the present invention will be described in detail below with reference to the attached drawings.

[0044] FIG. 1 is a perspective view of a state monitoring device (100) of a switching device utilizing a magnetic sensor according to an embodiment of the present invention. Referring to FIG. 1, the left perspective view shows the enclosure (10) of a gas-insulated switchgear (GIS), a switching device (11), and a link (14) connecting a motor (not shown) and an actuator (not shown), and is a drawing before the bracket is installed. In FIG. 1, a disconnect switch is used as an example of the switching device (11), but a grounding switch can also be used.

[0045] A first fixing portion (12-1) is formed on the surface of the switching device (11), and a second fixing portion (12-2) is formed on the edge of the enclosure (10).

[0046] The first fixing portion (12-1) is formed on the upper part of an insertion member (14-1) that is inserted into a cylindrical protrusion (13) for fixing the end of the link (140). The second fixing portion (12-2) is a portion where the edge of the outer casing (10) and the edge of the disconnect switch (110) are joined and fastened by a bolt and nut (i.e., a bolting method).

[0047] In this left perspective view, when the movable bracket (110) and the fixed bracket (120) are fastened and fixed to the first fixed part (12-1) and the second fixed part (12-2), respectively, it becomes the right perspective view.

[0048] To elaborate, the movable bracket (110) is fastened and assembled to the first fixed portion (12-1). That is, it is fastened and fixed to the upper part of the insert member (14-1) that fixes the arm of the link (140). To elaborate, the movable bracket (110) is fastened and fixed by fastening a bolt with a head having screw threads formed at the end of the insert member (14-1). Of course, screw threads are also formed on the inner side of the insert member (14-1) for fastening by bolting.

[0049] Meanwhile, a fixing bracket (120) is fastened to the second fixing portion (12-2). That is, it is fastened and fixed to the second fixing portion (12-2) formed on the edge of the outer casing (10) of the insulating switch. To elaborate, the fixing bracket (120) is first inserted into the bolt formed at the second fixing portion (12-2) where the edge of the outer casing (10) and the edge of the disconnect switch (110) are joined, and then the nut is tightened to fix it. To this end, a support member (121) is formed on the fixing bracket (120). The support member (121) can be joined by welding.

[0050] The fixed bracket (120) has a shape in which one side of a portion of the upper surface is formed at a 90° angle, and the remaining side is open. Additionally, a support (121) for fastening and fixing with the first fixed part (12-1) may be formed on the remaining side. Furthermore, a fixed sensor is attached to the surface of the fixed bracket (120) in a figure-eight shape.

[0051] Attachment is achieved using adhesive, and a bolting method is also possible. For instance, holes can be formed at both ends of the fixed sensor to secure it with bolts and nuts.

[0052] Meanwhile, a movable sensor is attached to the rear of the movable bracket (110). To elaborate, the arm formed at the end of the link (140) rotates according to the movement of the link (14), and the movable bracket (110) also rotates according to the rotation of the arm. Therefore, as the movable bracket (110) rotates, the movable sensor comes close to one of the fixed sensors that are fixed in a figure-eight shape, thereby enabling the detection of the movement of the link (14).

[0053] The method of attaching the movable sensor to the rear of the movable bracket (110) may involve using adhesive or attaching it using rivets. Of course, it is also possible to attach and fix it using bolts and nuts.

[0054] FIG. 2 is a design drawing of a fixed bracket (110) configured in a status monitoring device of a switching device illustrated in FIG. 1. Referring to FIG. 2, one side (210) of a portion of the upper surface of the fixed bracket (120) is formed at a 90° angle, and the remaining side is open. An installation hole (211) for installing an electronic device is formed in one side (210).

[0055] Additionally, an arch portion (230) is formed at the bottom of the fixed bracket (120) to be aligned with the protrusion (13). A first fixed sensor (220-1) and a second fixed sensor (220-2) are attached to this arch portion (230) in a figure-eight shape to prevent the fixed bracket (120) from sliding downward. Holes (221, 222) are formed to connect the first fixed sensor (220-1) and the second fixed sensor (220-2) to an electronic device via signal lines.

[0056] FIG. 3 is a design drawing of a support (121) of a state monitoring device (100) of a switching device illustrated in FIG. 1. Referring to FIG. 3, the support (121) has a hole (301) formed therein, and for welding with a fixing bracket (120), one side is flat and the other side has a curved shape.

[0057] FIG. 4 is a design drawing of a movable bracket (120) of a state monitoring device (100) of a switching device illustrated in FIG. 1. Referring to FIG. 4, the movable bracket (120) is in a “T” shape for left and right rotation, and a movable sensor (420) is attached to the rear of the “-” shape (411) of the “T” shape. The movable bracket (120) is composed of a head portion of the “-” shape (411), a body portion (410) of the “I” shape (410), and a leg portion of the coin shape (412) having a round hole (401).

[0058] The round hole (401) is shaped for fixing to the first fixed part (12-1).

[0059] FIG. 5 is a perspective view of the magnetic sensor illustrated in FIG. 1. Referring to FIG. 5, it consists of a fixed sensor (220-1, 220-2) and a movable sensor (420). An AMSECO 832T may be used as the magnetic sensor. Thus, the operating status of the link can be monitored by utilizing an "A" contact that closes when the fixed sensor (220-1, 220-2) is within the operating range of the movable sensor (420).

[0060] FIG. 6 is a monitoring lamp circuit (600) related to the operation of a disconnection switch (DS) and an earthing switch (ES) according to an embodiment of the present invention. To elaborate, with reference to FIG. 6, a Molded Case Circuit Breaker (MCCB) (610, 620) for circuit configuration is separately installed to perform the function of cutting off power flowing into the disconnection switch (631) or the earthing switch (632).

[0061] Additionally, monitoring lamps (641, 642) indicating the status of the disconnect switch (631) and the grounding switch (632) are configured. While LEDs (Light Emitting Diodes) are mainly used for the lamps (641, 642), they are not limited to this, and OLEDs (Organic LEDs), Micro LEDs, Mini LEDs, etc., may also be used.

[0062] When the disconnect switch is switched on (A contact), the first lamp (641) for operating device switching is lit.

[0063] In contrast, when the grounding switch is switched on (A contact), the second lamp (642) for operating device switching is lit.

[0064] FIG. 7 is a diagram showing the operating state of the monitoring lamps (641, 642) illustrated in FIG. 6. Referring to FIG. 7, the monitoring lamps (641, 642) are turned off in the open state, and the monitoring lamps (641, 642) are turned on in the closed state. Explanation of the symbols

[0065] 10: Enclosure 11: Switching device 12-1: First fixation site 12-2: Second fixation site 13: Protrusion 14: Link 100: Status monitoring device 110: Movable bracket 120: Fixed bracket 220-1: 1st fixed sensor 220-2: 2nd fixed sensor 420: Operation sensor

Claims

Claim 1 A movable bracket (110) fastened and assembled to a first fixed portion (12-1) formed on the surface of a switching device (11); a fixed bracket (120) fastened and assembled to a second fixed portion (12-2) formed on the edge of the outer casing (10) of an insulating switch; It includes sensors (220-1, 220-2, 420) that monitor the state of the switching device (11) by sensing the operation of a link (14) connecting a motor and a mover installed within the switching device (11); wherein the first fixed sensor (220-1) and the second fixed sensor (220-2) of the sensors (220-1, 220-2, 420) are attached in an eight-shape so as to sense whether a mover is inserted according to the rotation direction of the link (14); wherein the switching device (11) is a disconnection switch or an earthing switch; wherein the movable sensor (420) among the sensors (220-1, 220-2, 420) is attached to the rear of the movable bracket (110); and the lower end of the fixed bracket (120) is configured to be aligned with a cylindrical protrusion (13) formed on the surface of the switching device (11). A state monitoring device for a switching device having an arch portion characterized by the formation of an arch portion (230).

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