Cut out switching apparatus having fuse

Abstract

A line cutout switching device capable of remote trip detection with an integrated sensor, capable of recognizing trip information in real time when a branch line trips (blocks), is disclosed. The line cutout switching device is characterized by comprising a cutout switch, a holder supporting the cutout switch, and a sensing sensor installed on the cutout switch and electrically connected to the holder, which detects whether a trip state of the cutout switch has occurred and generates detection information.

Description

Technology Field

[0001] The present invention relates to a cutout switching device for a power line, and more specifically, to a cutout switching device for a power line having a sensor-integrated fuse capable of remote trip detection that can recognize trip information in real time when a branch line trips (blocks), and a power distribution system having the same. Background Technology

[0002] Generally, a cutout switch for a pole-mounted transformer is a transformer protection device installed between the power line of a utility pole and the branch line of the pole-mounted transformer to cut off the power in an emergency. This cutout switch is equipped with a fuse that protects the transformer from overload or lightning strikes, thereby preventing failures in the distribution line.

[0003] This cutout switch is opened and closed by utilizing a live-line operating rod to connect the operating ring of the operating rod of the upper fixing part of the cutout holder to the upper body of the cutout switch. Here, the opening principle of the cutout switch is that when the fuse in the internal fuse box installed inside the holder of the cutout switch melts, the tension of the flipper of the lower fixing part of the fuse is relieved, and it opens by free fall due to gravity.

[0004] However, the current situation relies solely on customer reports to determine if a branch line COS trips, affecting only specific areas. Furthermore, it takes a considerable amount of time to detect a branch line COS trip and restore power. Specifically, it takes an average of two hours. To elaborate, once a customer reports a power outage and the report is received by the customer center, it is forwarded to the relevant branch office. Consequently, personnel from the branch's distribution operations room are dispatched to the site to verify the COS trip. During this verification process, measures such as removing magpie nests and trees that may be causing the outage are carried out, and power transmission is resumed. Prior art literature

[0005] 1. Korean Published Patent No. 10-2014-0062775 The problem to be solved

[0006] The present invention is proposed to resolve the problems according to the background technology above, and aims to provide a line cutout switching device having a sensor-integrated fuse capable of remote trip detection that can recognize trip information in real time when a branch line trips (blocks), and a power distribution system having the same.

[0007] In addition, another objective of the present invention is to provide a line cutout switching device and a power distribution system equipped with the same, which can reduce the inconvenience of electricity usage for residents in outlying areas, such as rural and fishing villages, by detecting power outages in real time and enabling rapid power restoration. means of solving the problem

[0008] To achieve the above-mentioned objectives, the present invention provides a line cutout switching device capable of remote trip detection with an integrated sensor that can recognize trip information in real time when a branch line trips (blocks).

[0009] The above-mentioned line cutout switching device is,

[0010] Cutout switch;

[0011] A holder supporting the above-mentioned cutout switch; and

[0012] It is characterized by including a detection sensor that is installed on the cutout switch and electrically connected to the holder, and detects whether a trip state of the cutout switch occurs and generates detection information.

[0013] In addition, the detection sensor is characterized by comprising: a battery that supplies power; a control unit connected to the cutout switch to generate the detection information; and a communication unit that transmits the detection information.

[0014] In addition, the control unit is characterized by determining whether the trip state occurs using the resistance value of the cutout switch.

[0015] In addition, the cutout switch is characterized by comprising: a body in which a hollow is formed; a resistor located inside the hollow of the body and generating a resistance value; pipes arranged at regular intervals on the outer surface of the resistor; and terminals sealing both ends of the body.

[0016] In addition, the resistor is composed of a first sub-resistor and a second sub-resistor, and is characterized by having a signal line terminal disposed between the ends of the first sub-resistor and the second sub-resistor.

[0017] In addition, the first resistance value of the first sub-resistor and the second sub-resistor is each 200 MΩ.

[0018] In addition, the second resistance value of the holder is characterized as being 200 MΩ.

[0019] In addition, the occurrence of the trip state is characterized in that if the first resistance value and the second resistance value are connected in parallel and the result is 100 MΩ, the holder is in a closed normal state, and if only the first resistance value is calculated, the holder is in a trip state where it is open.

[0020] In addition, a fixing layer is formed between the outer surface of the resistor and the inner surface of the pipe to fix the resistor.

[0021] In addition, the material of the fixed layer is characterized as being silicone.

[0022] On the other hand, another embodiment of the present invention provides a power distribution system characterized by comprising: a line cutout switching device described above; a communication linker that receives detection information from the line cutout switching device; and a communication terminal that outputs the detection information from the communication linker.

[0023] On the other hand, another embodiment of the present invention provides a power distribution system characterized by comprising: a line cutout switching device; a communication linker that receives detection information from the line cutout switching device; and a management server that outputs detection information regarding the line cutout switching device from the communication linker onto a screen. Effects of the invention

[0025] According to the present invention, sensor-integrated remote trip detection is possible, thereby enabling real-time recognition of trip information when a branch line trips (blocks).

[0026] In addition, another effect of the present invention is that it can reduce the inconvenience of electricity usage for residents in outlying areas, such as rural and fishing villages, by enabling rapid power restoration through real-time power outage detection.

[0027] In addition, another effect of the present invention is to provide an economically advantageous effect by reducing the cost of manpower input for power outage restoration. One point to note is that it is possible. Brief explanation of the drawing

[0028] FIG. 1 is a block diagram of a power distribution system equipped with a line cutout switching device capable of remote trip detection according to an embodiment of the present invention. Figure 2 is a cross-sectional view of a line cutout switch shown in Figure 1. Figure 3 is a partial cross-sectional view of the body shown in Figure 2. Figure 4 is a conceptual diagram of a part of the body configuration shown in Figure 2. FIG. 5 is a conceptual diagram showing a trip detection state according to an embodiment of the present invention. Specific details for implementing the invention

[0029] The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0030] Similar reference numerals are used for similar components when describing each drawing. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0031] For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and / or" includes a combination of a plurality of related described items or any of a plurality of related described items.

[0032] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which this invention pertains.

[0033] Terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0034] A cutout switching device for a power line capable of remote trip detection and a power distribution system having the same, according to an embodiment of the present invention, will be described in detail below with reference to the attached drawings.

[0036] FIG. 1 is a block diagram of a power distribution system (10) equipped with a line cutout switching device (100) capable of remote trip detection according to an embodiment of the present invention. Referring to FIG. 1, the line cutout switching device (100) may be configured to include a cutout switch (101), a holder (102) supporting the cutout switch (101), a detection sensor (110) installed on the cutout switch (101), etc.

[0037] A cut-out switch (101) (COS) is primarily installed on each phase of a pole-mounted transformer for the protection and switching of the transformer and is manufactured as a single-pole switch. A holder (102) is assembled at both ends of the cut-out switch (101). However, the holder (102) is designed to open by gravity when the internal fuse blows, so that the blown status of the fuse can be easily identified visually from a distance. That is, if the holder (102) is attached to both ends of the cut-out switch (101), it is in a normal state, and if the holder (102) detaches from one end of the cut-out switch (101) and sags downward, it is in a tripped state.

[0038] In particular, the cutout switch (101) has a structure in which a fuse is installed on the outer surface (cylindrical) of a ceramic material. Among the fuses installed as overcurrent breakers, the fuse used in high-voltage lines is designed to withstand 13 times the rated current and also to blow within 120 minutes at twice the current.

[0039] In the event that a problem occurs in the power distribution line and work is to be performed by cutting off the electricity, such as replacing electrical components, a worker on the ground pulls a long operating rod attached to a connecting ring formed in the fuse holder, thereby artificially separating one end of the holder (102) from the terminal of the cutout switch (101) and cutting off the electricity.

[0040] A detection sensor (110) is installed in the center of the cutout switch (101). The detection sensor (110) is characterized by including a battery (111) that supplies power, a control unit (112) connected to the cutout switch (101) to detect whether it is in a tripped state and generate detection information, and a communication unit (113) that transmits the detection information.

[0041] The battery (111) can be a primary battery such as manganese, alkaline, or lithium. Of course, coin lithium batteries, lithium cylindrical batteries, etc. can also be used.

[0042] The control unit (112) has the function of sensing the resistance value of the cutout switch (101) to detect whether a trip state has occurred and generating detection information. To this end, the control unit (112) may be configured with circuit elements such as a resistance sensor, an IC (Integrated Circuit) chip, and memory. The memory may be composed of a combination of non-volatile memory such as lash memory, EEPROM (Electrically erasable programmable read-only memory), SRAM (Static RAM), FRAM (Ferro-electric RAM), PRAM (Phase-change RAM), MRAM (Magnetic RAM), and / or volatile memory such as DRAM (Dynamic Random Access Memory), SDRAM (Synchronous Dynamic Random Access Memory), and DDR-SDRAM (Double Data Rate-SDRAM).

[0043] Magnetoresistance elements (MR sensors) can be used as resistance sensors. Magnetoresistance elements are devices that utilize the magnetoresistance effect, in which the resistance value changes due to magnetism. The magnetoresistance effect is a property that can be observed in ordinary metals as well.

[0044] The communication unit (113) performs the function of transmitting detection information generated by the control unit (112) to the communication linker (120) via wireless communication technology. To this end, the communication unit (113) may be configured to include communication circuits such as a wireless modem. Long Range (LoRa) is used as the wireless communication technology, but it is not limited thereto; examples include Infrared Data (IrDA) communication, Local Area Network (LAN), Bluetooth, Light Fidelity (LiFi), Wireless Fidelity (WiFi), and Near Field Control (NFC). Of course, it is also possible to use wired communication technology. Wired communication technologies may include RS232, RS485, Modbus, CC-Link communication, and Ethernet communication.

[0045] The communication linker (120) performs the function of receiving detection information from the communication unit (113) and transmitting it to the communication terminal (130). The communication linker (120) can be a Feeder Remote Terminal Unit (FRTU), a relay, etc. Accordingly, the communication linker (120) can be connected to a management server (not shown) through a wired / wireless communication network (not shown), and transmits detection information to the communication terminal (130) through this management server.

[0046] A wired or wireless communication network refers to a connection structure capable of exchanging information between each node, such as multiple terminals and servers, and may include a Public Switched Telephone Network (PSTN), a Public Switched Data Network (PSDN), an Integrated Services Digital Network (ISDN), a Broadband Integrated Services Digital Network (BISDN), a Local Area Network (LAN), a Metropolitan Area Network (MAN), and a Wide Area Network (WLAN). However, the present invention is not limited thereto and may include wireless communication networks such as CDMA (Code Division Multiple Access), WCDMA (Wideband Code Division Multiple Access), LET (Long-Term Evolution), Wibro (Wireless Broadband), WiFi (Wireless Fidelity), HSDPA (High Speed ​​Downlink Packet Access) networks, Bluetooth, NFC (Near Field Communication) networks, satellite broadcasting networks, analog broadcasting networks, and DMB (Digital Multimedia Broadcasting) networks. Alternatively, it may be a combination of these wired and wireless communication networks.

[0047] The communication terminal (130) performs the function of displaying detection information. To this end, the communication terminal (130) can be a mobile phone, a smartphone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), a navigation device, a notepad, etc.

[0048] Accordingly, the power distribution system (10) may be configured to include a line cutout switching device (100), a communication linker (120) that receives detection information generated by detecting whether a trip state of a cutout switch (101) occurs via communication, and a communication terminal (130) that receives detection information from the communication linker (120).

[0049] FIG. 2 is a cross-sectional view of the cutout switch (101) illustrated in FIG. 1. Referring to FIG. 2, the cutout switch (101) may be configured to include a body (200) in which a hollow is formed, a resistor (210) located inside the hollow of the body (200), a pipe (220) arranged at a certain distance from the outer surface of the resistor (210), a terminal (240) that seals both ends of the body (200), and a fitting (250, 270) connected to the terminal (240).

[0050] The body (200) is an insulator, and a polymer is used, but is not limited thereto. Since electrical insulation, weather resistance in the outdoors, and mechanical strength are required, a ceramic material may also be used.

[0051] A hollow is formed on the inner side of the body (200), and a resistor (210) is inserted into this hollow. The resistor (210) is composed of a first sub-resistor (210-1) and a second sub-resistor (210-2), and a signal line terminal (230) is formed between the ends of the first sub-resistor (210-1) and the second sub-resistor (210-2). A connector (231) is assembled to this signal line terminal (230). Through this connector (231), the detection sensor (110) is connected to the signal line terminal (230). SiO₂, RuO₂, CuNi, etc., may be used as the material for the first sub-resistor (210-1) and / or the second sub-resistor (210-2). In addition, the first sub-resistor (210-1) and the second sub-resistor (210-2) are high-voltage resistors, and their resistance values ​​are each about 200 MΩ.

[0052] The pipe (220), which is inserted into the hollow of the body (200) and surrounds the outer surface of the first sub-resistor (210-1) and the second sub-resistor (210-2), is tubular in shape. Fiber reinforced plastics (FRP) may be used as the material.

[0053] The terminal (240) performs the function of sealing the hollows formed at both ends of the body (200). That is, an upper terminal (240-1) is connected to the top and a lower terminal (240-2) is connected to the bottom.

[0054] A connecting part (250-1, 250-2) is integrally formed on this terminal (240-1, 240-2). Of course, it may also be formed separately and welded. A first fitting (260) and a second fitting (270) are connected and assembled to this connecting part (250-1, 250-2). Assembly can be achieved by a bolting method (262, 263, 271, 272) using bolts and nuts. Of course, a rivet method is also possible.

[0055] The holder (102) is connected by the first fitting (260) and the second fitting (270). The holder (102) has a structure in which a fuse is installed on the outer surface (cylindrical) of a ceramic shape. Among the fuses installed as overcurrent circuit breakers, the fuse used in high-voltage lines is designed to withstand a current 13 times the rated current and also to blow within 120 minutes at twice the current.

[0056] Meanwhile, the holder (102) also has a resistance value of 200M. This holder (102) is connected to and fixed to the first fitting (260) and the second fitting (270). In the case of the first fitting (260), an elastic catch plate (280) and a spring (261) are configured so that the top of the holder (102) is open, and in the case of the second fitting (270), a hook structure is provided so that the bottom of the holder (102) is fixed. Since the structure of such a holder (102) is widely known, further explanation will be omitted.

[0057] FIG. 3 is a partial cross-sectional view of the body (200) illustrated in FIG. 2. Referring to FIG. 3, the body (200) is positioned at the outermost edge, and a pipe (220), a fixed layer (300), and a resistor (210-1, 210-2) are sequentially placed inside the body (200). The material of the fixed layer (300) may be silicone, etc. The fixed layer (300) functions to fix the resistor (210-1, 210-2) so that it does not move within the pipe (220).

[0058] FIG. 4 is a conceptual diagram of a part of the configuration of the body (200) illustrated in FIG. 2. Referring to FIG. 4, a concept is shown in which a first sub-resistor (210-1) and a second sub-resistor (210-2) are configured in series.

[0059] FIG. 5 is a conceptual diagram showing a trip detection state according to an embodiment of the present invention. Referring to FIG. 5, it consists of a normal state and a trip state. The normal state is when the holder (102) is closed, and the trip state is when the holder (102) is open. To elaborate, in the case of the normal state, the parallel equivalent resistance value (100 MΩ) between the body and the holder is measured. That is, body resistance 200 MΩ + holder resistance 200 MΩ = parallel equivalent resistance value 100 MΩ.

[0060] In contrast, in the tripped state, a value is measured that changes to a resistance value (200MΩ) of a series structure connected only to the body.

[0061] In addition, the power distribution system (10) can also display the corresponding line cutout switching device (100) in a tripped state on the power distribution screen through a management server installed at the power distribution center in the second stage. That is, it is displayed on the communication terminal in the first stage and on the screen of the management server in the second stage. Of course, it is also possible to display them simultaneously. The display can be "Trip Display #1". To this end, the management server may be configured with a microprocessor, a program, software, etc. Explanation of the symbols

[0062] 10: Power distribution system 100: Line cutout switching device 101: Cutout switch 102: Holder 110: Detection sensor 111: Battery 112: Control unit 113: Communications Department 200: Body 210: Resistor 220: Pipe 240: Terminal

Claims

Claim 1 The device comprises: a cutout switch (101); a holder (102) that supports the cutout switch (101); and a detection sensor (110) that is installed on the cutout switch (101), is electrically connected to the holder (102), and detects whether a trip state occurs in the cutout switch (101) and generates detection information; wherein the detection sensor (110) comprises: a battery (111) that supplies power; a control unit (112) that is connected to the cutout switch (101) and generates the detection information; and a communication unit (113) that transmits the detection information; wherein the control unit (112) determines whether a trip state occurs using the resistance value of the cutout switch (101); and the cutout switch (101) comprises: a body (200) in which a hollow is formed; a resistor (210) located inside the hollow of the body (200) and generating a resistance value; and pipes (220) arranged at regular intervals on the outer surface of the resistor (210). and terminals (240) sealing both ends of the body (200); wherein the resistor (210) is composed of a first sub-resistor (210-1) and a second sub-resistor (210-2), and a signal line terminal (230) is disposed between the ends of the first sub-resistor (210-1) and the second sub-resistor (210-2); the terminals (240) sealing both ends of the body (200) are composed of an upper terminal (240-1) connected to the top of the body (200) and a lower terminal (240-2) connected to the bottom of the body, and a connecting portion (250-1, 250-2) is integrally formed on the upper terminal (240-1) and the lower terminal (240-2), and a first fitting (260) and a A line cutout switching device having a fuse, characterized in that two metal fittings (270) are connected and assembled, the holder (102) is connected by the first metal fitting (260) and the second metal fitting (270), and the holder (102) has a structure in which a fuse is installed on a cylindrical magnetic outer surface.

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