Electric leakage alarm system

Abstract

The present invention relates to an electric leakage alarm system and, more specifically, to an electric leakage alarm system comprising: a main circuit to which a current is applied; a zero-phase current transformer disposed on the main circuit, to which the current is applied, to detect a leakage current on the main circuit; a circuit breaking unit located on the main circuit and interrupting the current of the main circuit when a leakage current is detected; a control unit connected to one side of the zero-phase current transformer to generate a leakage signal by comparing the leakage current detected by the zero-phase current transformer with a preset leakage current threshold, and to control the circuit breaking unit according to the leakage signal; and an alarm unit for notifying a manager or a user that electric leakage has occurred when an electric leakage current is detected by an electric leakage unit.

Description

Electric leakage warning system

[0001] The present invention relates to a leakage current warning system, and more particularly, to a leakage current warning system including a main circuit to which current is applied, a zero-phase current transformer positioned on the main circuit to detect a leakage current on the main circuit to which current is applied, a blocking unit positioned on the main circuit to block the current when a leakage current is detected, a control unit connected to one side of the zero-phase current transformer to compare a leakage current detected from the zero-phase current transformer with a preset leakage current threshold to generate a leakage signal and control the blocking unit according to the leakage signal, and an alarm unit that notifies a manager or a user of the fact of a leakage current when a leakage current is detected in the leakage unit.

[0002]

[0003] The material described in this section merely provides background information for the present invention and does not constitute prior art.

[0004] Electric shock is a phenomenon in which the human body reacts when the leakage current flowing from the power source through the human body to the ground exceeds a certain level.

[0005] Typically, a leakage current of 15 mA or more causes convulsions, and a current of 50 mA or more can lead to death. The main cause of death is cardiac arrest, which occurs when the heart stops functioning due to damage to nerves caused by the current flowing through the heart.

[0006] The risk of electric shock is related to the body's resistance when the current is applied, which is largely dependent on the condition of the skin.

[0007] When electrical equipment, such as an outlet, heater, or light, is submerged in water and a human body comes into contact with the water or the metal housing that is energized through the water, current flows from the exposed conductor of the electrical equipment through the water and the human body to the ground, which is the grounding surface.

[0008] At this time, the human body's skin is prone to being wet, and contact resistance is extremely low, making it a very dangerous situation. A short circuit between power lines occurs when the insulation between the two wires decreases, increasing electrical conductivity. This causes a rapid current flow, potentially causing fires or short circuits in electrical equipment.

[0009] Normally, air has a very high insulating value, maintaining electrical insulation between two wires through air. However, if a highly conductive fluid fills the space between the wires, for example, due to submersion, the current between the phases increases rapidly, resulting in a short circuit.

[0010] Korean Patent Publication No. 2005-0037986 discloses a device for preventing electric shock due to immersion, which attaches a metal plate or metal mesh to a bare charging part so that when the part is submerged, the current leaking from the bare charging part is conducted to the conductive metal plate or metal mesh, thereby preventing electric shock accidents.

[0011] The metal plate or metal mesh is connected to the neutral and earth terminals among the terminal blocks by wires, and the size of the metal plate is approximately 50cm X 30cm.

[0012] Although the above-mentioned conventional technology does not explain the principle in detail, it can be seen that the current flowing to the human body is limited by placing a metal plate between the submerged conductor and the human body in a state of much lower resistance than the resistance through water and the human body when submerged, thereby electrically configuring it in parallel with the human body.

[0013] However, these metal plates or metal meshes cannot effectively block leakage currents by shielding the electric field generated radially from the bare charging section, and there is a problem that spatial restrictions occur during installation.

[0014] In addition, if the leakage current that occurs is not effectively blocked, the circuit breaker operates and blocks all current, so not only the leakage current but all current flow is blocked, and the operation of the electronic equipment being used is stopped. This causes a problem in that not only a safety accident due to the leakage current but also secondary damage due to the forced shutdown of the electronic equipment occurs.

[0015] Therefore, there is a need to develop a device that can solve the problems of the prior art as described above.

[0016]

[0017] The problem to be solved by the present invention is to complement the shortcomings of the above-mentioned prior art, and the purpose of the present invention is as follows.

[0018] First, we aim to provide a leakage current warning system that controls leakage current in a separate control circuit without damaging the main circuit.

[0019] Second, we aim to provide a leakage warning system that can control leakage current even if one slit malfunctions through the interaction between the first rupture slit and the second rupture slit.

[0020] The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

[0021]

[0022] According to the present invention, a main circuit to which current is applied, a zero-phase current transformer positioned on the main circuit to detect a leakage current on the main circuit to which current is applied, a blocking unit positioned on the main circuit to block the current when a leakage current is detected, a control unit connected to one side of the zero-phase current transformer to compare a leakage current detected from the zero-phase current transformer with a preset leakage current threshold to generate a leakage signal and control the blocking unit according to the leakage signal, and an alarm unit to notify a manager or user of a leakage current when a leakage current is detected in the leakage unit.

[0023] At this time, the control unit includes a control circuit to which leakage current is applied from the main circuit, an amplifier that amplifies the leakage current, a first rupture slit that is connected to one side past the amplifier from the direction of the leakage current to receive the amplified leakage current, and is ruptured when a current greater than a preset current is applied to the control circuit, a first auxiliary circuit that is directly connected to the first rupture slit to which a current is applied when the first rupture slit is ruptured and discharges the applied current from the control circuit, a second rupture slit that is connected to one side past the amplifier from the direction of the leakage current to which a current is applied when the first rupture slit is ruptured and is ruptured at a relatively higher current than the first rupture slit so as to prevent damage to the control circuit due to a current greater than a preset current when the first rupture slit does not operate or malfunctions, and a second rupture slit that is directly connected to the second rupture slit to which a current is applied when the second rupture slit is ruptured and discharges the applied current from the control circuit. The second auxiliary circuit may include a blocking control unit that operates a blocking unit to stop the operation of the main circuit when at least one of the first rupture slit or the second rupture slit is broken.

[0024] In addition, the notification unit may include a first notification unit that is connected to the first auxiliary circuit and operates with an applied leakage current and notifies an administrator or user of a leakage current by at least one means of light, sound, and data transmission, and a second notification unit that is connected to the second auxiliary circuit and operates with an applied leakage current and notifies an administrator or user of a leakage current by at least one means of light, sound, and data transmission, but is a different means from the first notification unit or, if the means are the same, notifies the leakage current in a different form.

[0025] Furthermore, the control unit may include a third rupture slit that is ruptured by a relatively higher current than the second rupture slit so as to prevent damage to the control circuit due to a current exceeding a preset current when the first rupture slit and the second rupture slit do not operate or malfunction, and a third auxiliary circuit that is directly connected to the third rupture slit and applies current when the third rupture slit is ruptured, and discharges the applied current from the control circuit.

[0026] At this time, the notification unit is connected to the third auxiliary circuit and operates with the applied leakage current, and notifies the administrator or user of the leakage by at least one means of light, sound, and data transmission, and may include a third notification unit that notifies the leakage by a different means than the first notification unit, or in a different form if the means are the same.

[0027] Meanwhile, the main circuit may include a wire through which current flows, a fiber layer formed of braided aramid fibers and provided to wrap the wire, and a synthetic resin layer formed to a thickness thinner than the fiber layer and provided to wrap the fiber layer.

[0028] The above synthetic resin layer can be produced by mixing 70 weight parts of polyester, 10 weight parts of polyphenylene sulfide resin, 10 weight parts of polypropylene resin, 5 weight parts of silicon, and 5 weight parts of basalt particles crushed to a size of 500 nm to 700 nm to prevent leakage current from occurring.

[0029] At this time, the control unit generates a leakage signal so that the blocking unit blocks the main circuit when at least one of the first rupture slit, the second rupture slit, and the third rupture slit is broken, changes the size of the electric signal amplified by the amplifying unit, generates a energization signal for energizing the main circuit, and generates an initialization command for setting the state of the leakage current to a normal state according to the energization signal, and can generate a new leakage signal when at least one of the first rupture slit, the second rupture slit, and the third rupture slit is broken after the main circuit is in an energized state.

[0030] In addition, the main circuit is formed to a thickness thicker than the synthetic resin layer, and includes an auxiliary synthetic resin layer provided to surround the synthetic resin layer, and the auxiliary synthetic resin layer may be a mixture of 20 weight ratios of coated glass fibers, 30 weight ratios of graphite, 20 weight ratios of polypropylene resin, 20 weight ratios of phenolic resin, and 10 weight ratios of silicone, from which organic solvents have been removed and which have been heat-treated in an inert atmosphere at 900-1000 degrees.

[0031] Additional solutions of the present invention will be described in part in the description that follows below, and may be readily ascertained in part from the description, or may be acquired by practicing the present invention.

[0032] Both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

[0033]

[0034] The effects of the present invention configured as described above are as follows.

[0035] First, leakage current can be controlled in a separate control circuit without damaging the main circuit.

[0036] Second, the leakage current can be controlled even if one slit malfunctions through the interaction between the first and second slits.

[0037] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0038]

[0039] Figures 1 and 2 are conceptual diagrams of a leakage warning system according to one embodiment of the present invention.

[0040]

[0041]

[0042] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the attached drawings.

[0043] However, when describing a specific embodiment of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description is omitted.

[0044] The above-described objects, features, and advantages of the present invention will become more apparent through the following detailed description taken in conjunction with the accompanying drawings. However, the present invention is susceptible to various modifications and various embodiments. Therefore, specific embodiments will be illustrated in the drawings and described in detail below.

[0045] If a detailed description of a known function or configuration related to the present invention is deemed to unnecessarily obscure the gist of the present invention, such detailed description will be omitted. Furthermore, the numbers used in the description of this specification are merely identifiers used to distinguish one component from another.

[0046] Additionally, the suffix "부" for components used in the following description is merely used or mixed to facilitate the writing of the specification, and does not have a distinct meaning or role in itself.

[0047]

[0048] Figures 1 and 2 are conceptual diagrams of a leakage warning system according to one embodiment of the present invention.

[0049] According to the present invention, a main circuit to which current is applied, a zero-phase current transformer positioned on the main circuit to detect a leakage current on the main circuit to which current is applied, a blocking unit positioned on the main circuit to block the current when a leakage current is detected, a control unit connected to one side of the zero-phase current transformer to compare a leakage current detected from the zero-phase current transformer with a preset leakage current threshold to generate a leakage signal and control the blocking unit according to the leakage signal, and an alarm unit to notify a manager or user of a leakage current when a leakage current is detected in the leakage unit.

[0050] At this time, the control unit includes a control circuit to which leakage current is applied from the main circuit, an amplifier that amplifies the leakage current, a first rupture slit that is connected to one side past the amplifier from the direction of the leakage current to receive the amplified leakage current, and is ruptured when a current greater than a preset current is applied to the control circuit, a first auxiliary circuit that is directly connected to the first rupture slit to which a current is applied when the first rupture slit is ruptured and discharges the applied current from the control circuit, a second rupture slit that is connected to one side past the amplifier from the direction of the leakage current to which a current is applied when the first rupture slit is ruptured and is ruptured at a relatively higher current than the first rupture slit so as to prevent damage to the control circuit due to a current greater than a preset current when the first rupture slit does not operate or malfunctions, and a second rupture slit that is directly connected to the second rupture slit to which a current is applied when the second rupture slit is ruptured and discharges the applied current from the control circuit. The second auxiliary circuit may include a blocking control unit that operates a blocking unit to stop the operation of the main circuit when at least one of the first rupture slit or the second rupture slit is broken.

[0051] In addition, the notification unit may include a first notification unit that is connected to the first auxiliary circuit and operates with an applied leakage current and notifies an administrator or user of a leakage current by at least one means of light, sound, and data transmission, and a second notification unit that is connected to the second auxiliary circuit and operates with an applied leakage current and notifies an administrator or user of a leakage current by at least one means of light, sound, and data transmission, but is a different means from the first notification unit or, if the means are the same, notifies the leakage current in a different form.

[0052] In other forms, when notifying by sound, the sound volume of the second notification unit may be louder than that of the first notification unit, or when notifying by light, the color of the first notification unit may be different from that of the second notification unit, or the brightness may be different.

[0053] Furthermore, the control unit may include a third rupture slit that is ruptured by a relatively higher current than the second rupture slit so as to prevent damage to the control circuit due to a current exceeding a preset current when the first rupture slit and the second rupture slit do not operate or malfunction, and a third auxiliary circuit that is directly connected to the third rupture slit and applies current when the third rupture slit is ruptured, and discharges the applied current from the control circuit.

[0054] At this time, the notification unit is connected to the third auxiliary circuit and operates with the applied leakage current, and notifies the administrator or user of the leakage by at least one means of light, sound, and data transmission, and may include a third notification unit that notifies the leakage by a different means than the first notification unit, or in a different form if the means are the same.

[0055] Meanwhile, the main circuit may include a wire through which current flows, a fiber layer formed of braided aramid fibers and provided to wrap the wire, and a synthetic resin layer formed to a thickness thinner than the fiber layer and provided to wrap the fiber layer.

[0056] The above synthetic resin layer can be produced by mixing 70 weight parts of polyester, 10 weight parts of polyphenylene sulfide resin, 10 weight parts of polypropylene resin, 5 weight parts of silicon, and 5 weight parts of basalt particles crushed to a size of 500 nm to 700 nm to prevent leakage current from occurring.

[0057] At this time, the control unit generates a leakage signal so that the blocking unit blocks the main circuit when at least one of the first rupture slit, the second rupture slit, and the third rupture slit is broken, changes the size of the electric signal amplified by the amplifying unit, generates a energization signal for energizing the main circuit, and generates an initialization command for setting the state of the leakage current to a normal state according to the energization signal, and can generate a new leakage signal when at least one of the first rupture slit, the second rupture slit, and the third rupture slit is broken after the main circuit is in an energized state.

[0058] In addition, the main circuit is formed to a thickness thicker than the synthetic resin layer, and includes an auxiliary synthetic resin layer provided to surround the synthetic resin layer, and the auxiliary synthetic resin layer may be a mixture of 20 weight ratios of coated glass fibers, 30 weight ratios of graphite, 20 weight ratios of polypropylene resin, 20 weight ratios of phenolic resin, and 10 weight ratios of silicone, from which organic solvents have been removed and which have been heat-treated in an inert atmosphere at 900-1000 degrees.

[0059] This embodiment is merely an example to explain the technical idea of ​​the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations of this embodiment without departing from the essential characteristics of the present invention.

[0060] This embodiment is not intended to limit the technical idea of ​​the present invention but to explain it, and therefore the scope of the rights of the present invention is not limited by this embodiment.

[0061] The scope of protection of the present invention should be interpreted by the claims, and all technical ideas that are equivalent or equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

[0062]

[0063] 100 - Main circuit

[0064] 200 - Image Transformer

[0065] 300 - Blocker

[0066] 400 - Control Unit

[0067] 401 - Control Circuit

[0068] 402 - Amplifier

[0069] 410 - First slit

[0070] 411 - First auxiliary circuit

[0071] 420 - Second Breaking Slit

[0072] 421 - Second auxiliary circuit

[0073] 430 - Blocking Control Unit

[0074] 500 - Alarm

[0075] 510 - First Alarm Unit

[0076] 520 - Second Alarm Unit

Claims

1. Main circuit to which current is applied; A current transformer disposed on the main circuit and detecting a leakage current on the main circuit to which current is applied; A circuit breaker located on the main circuit above and which blocks current when a leakage current is detected; A control unit connected to one side of the image current transformer, comparing a leakage current detected from the image current transformer with a preset leakage current threshold to generate a leakage signal, and controlling the blocking unit according to the leakage signal; and An alarm unit that notifies the administrator or user of a current leak when a current leak is detected in the leakage section. Includes, The above control unit A control circuit to which leakage current is applied from the above main circuit; An amplifier that amplifies leakage current; A first rupture slit that is connected to one side of the amplifier from the direction of the leakage current flow and receives the amplified leakage current, and is ruptured when a current greater than a preset current is applied to the control circuit; A first auxiliary circuit that is directly connected to the first rupture slit and applies current when the first rupture slit is ruptured, and discharges the applied current from the control circuit; A second rupture slit connected to one side past the amplifying section from the direction of leakage current flow and ruptured by a current relatively higher than that of the first rupture slit so as to prevent damage to the control circuit due to a current exceeding a preset current when the first rupture slit does not operate or malfunctions; A second auxiliary circuit that is directly connected to the second rupture slit and applies current when the second rupture slit is ruptured, and discharges the applied current from the control circuit; A blocking control unit that operates a blocking unit to stop the operation of the main circuit when at least one of the first rupture slit or the second rupture slit is broken. Includes, The above notification section A first notification unit that is connected to the first auxiliary circuit and operates with an applied leakage current, and notifies the administrator or user of the fact of a leakage current by at least one of light, sound, and data transmission. A second notification unit that operates with an applied leakage current and is connected to the second auxiliary circuit and notifies the administrator or user of a leakage current by at least one means of light, sound, and data transmission, but is a different means from the first notification unit or, if the means are the same, notifies the fact of a leakage current in a different form. A leakage warning system characterized by including 2. In paragraph 1 The above control unit A third rupture slit connected to one side past the amplifying section from the direction of leakage current flow and ruptured by a current that is relatively higher than that of the second rupture slit so as to prevent damage to the control circuit due to a current exceeding a preset current when the first rupture slit and the second rupture slit do not operate or malfunction; A third auxiliary circuit that is directly connected to the third rupture slit and applies current when the third rupture slit is broken, and discharges the applied current from the control circuit; Includes, The above notification section A third notification unit that operates with the applied leakage current and is connected to the third auxiliary circuit and notifies the administrator or user of the fact of leakage by at least one means of light, sound and data transmission, but is a different means from the first notification unit or, if the means are the same, notifies the fact of leakage in a different form. A leakage warning system characterized by including 3. In paragraph 2 The above main circuit A wire carrying current; A fiber layer made of braided aramid fibers, which is provided to wrap the above wire; A synthetic resin layer formed to a thickness thinner than the above fiber layer and provided to wrap the above fiber layer; A leakage warning system characterized by including 4. In paragraph 3 The above synthetic resin layer A leakage warning system characterized by being produced by mixing 70 weight parts of polyester, 10 weight parts of polyphenylene sulfide resin, 10 weight parts of polypropylene resin, 5 weight parts of silicon, and 5 weight parts of basalt particles crushed to a size of 500 nm to 700 nm to prevent leakage current generation.

5. In paragraph 4 The above control unit A leakage warning system characterized in that, when at least one of the first rupture slit, the second rupture slit, and the third rupture slit is ruptured, the blocking unit generates a leakage signal to block the main circuit, changes the size of an electric signal amplified by the amplifying unit, generates a energization signal to energize the main circuit, generates an initialization command to set the state of the leakage current to a normal state according to the energization signal, and generates a new leakage signal when at least one of the first rupture slit, the second rupture slit, and the third rupture slit is ruptured after the main circuit is in an energized state.

6. In paragraph 5 The above main circuit An auxiliary synthetic resin layer formed with a thickness thicker than the above synthetic resin layer and provided to surround the above synthetic resin layer. Includes, The above auxiliary synthetic resin layer A leakage warning system characterized by a mixture of 20 weight parts of coated glass fiber, 30 weight parts of graphite, 20 weight parts of polypropylene resin, 20 weight parts of phenolic resin, and 10 weight parts of silicone, heat-treated in an inert atmosphere at 900-1000 degrees, with organic solvents removed.

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