KR20010012043A - Device for counting lightening - Google Patents

Abstract

PURPOSE: An apparatus for counting a number of thunderbolt strikes is provided to protect a system from overcurrent. CONSTITUTION: An apparatus for counting a number of thunderbolt strikes includes a power supply part(10), the first cut-off part(20), the second cut-off part(40), a lighting arrest(50), and a lamp(PL). The first cut-off part(20) causes the power supply of the power supply part(10) to a system(30) to be cut off when the current of the power provided to the system(30) is more than a reference current. The second cut-off part(40) is connected in parallel between the first cut-off part(20) and the system(30). The second cut-off part(40) causes the power provided through a power line to the system(30) to be cut off when the current of the power is more than the reference current. The lighting arrest(50) is connected with the second cut-off(40) and the ground. When the power supplying to the system(30) is cut off by the first and second cut-off parts(20, 40), the lamp(PL) is tuned on.

Description

Lightning count device {DEVICE FOR COUNTING LIGHTENING}

TECHNICAL FIELD The present invention relates to a system protection device, and more particularly, to a lightning count device for protecting a system from a current caused by a lightning strike flowing through a power line or a communication line and providing convenience for maintenance of the system.

In general, the term “system” means a device that uses an external power source as a power source, from home appliances, expensive production equipment, and electrical and electronic equipment.

When an overcurrent occurs due to lightning in the power supplied to such a system, an expensive system is damaged or malfunctions, which causes a fatal failure in system operation.

Therefore, in order to minimize the failure of such a system, a lightning arrester 3 is installed between the power supply unit 1 and the system 2 as shown in FIG. 1 to protect the system 2 from an overcurrent caused by lightning.

Such a conventional configuration protects the system 2 because the overcurrent caused by lightning strikes directly affecting the system 2 is extinguished through the ground by the operation of the arrester 3, but the lightning arrester 3 The surge voltage, which does not dissipate and flows slightly below a certain voltage, enters the system 2 and causes indirect damage. That is, a minute surge voltage below a certain voltage that is not extinguished through the ground by the arrester 3 enters the system 2 and does not immediately indicate an external failure or failure, but internally causes data loss or stress accumulation that is fatal to the hardware. This can cause system 2 failure, such as damage or malfunction of the system 2.

However, at this time, the user may not accurately determine whether the failure of the system is caused by the cumulative stress of the fine surge voltage or the malfunction of the arrester, and thus, it is difficult to solve the system failure factor.

The present invention is to solve such a problem, the object of the system is to detect the operation of the lightning arrester that protects the system from the overcurrent caused by lightning directly affecting the system and the overvoltage inflow information due to the lightning so that the user can know It is an object of the present invention to provide a lightning counting device capable of implementing stable system operation through maintenance before failures such as breakage and malfunction occur.

1 is a circuit block diagram of a general lightning arrester configured to protect a system from lightning strikes,

2 is a circuit diagram schematically showing a lightning count device according to a first embodiment of the present invention;

3 is a circuit diagram schematically illustrating a lightning count device according to a second embodiment of the present invention;

4 is a circuit diagram schematically illustrating a lightning count device according to a third embodiment of the present invention.

In order to achieve the above object, the present invention provides a power supply unit for supplying driving power, and a first power cut-off unit which is connected to the power supply unit and cuts off the power supplied from the power supply unit when the power supplied from the power supply unit is greater than a set allowable current. And a system connected to the first power interrupter and driven by a power supply of the power supply supplied from the first power interrupter to perform various functions, and parallel to a power line between the first power interrupter and the system. When the power supplied through the power line is more than the set allowable current, the second power cut-off unit to cut off the power supply, and is connected to the second power cut-off unit and grounded, and operates when an overcurrent flows into the power line due to lightning A lightning arrester that extinguishes through ground to protect the system and a parallel between the second power disconnect and the arrester And a pilot lamp for displaying the power supply state from the power supply unit according to the operation state of the first power cutoff unit and the second power cutoff unit so that the user can know the thunderbolt. The sensing unit detects the voltage or the amount of current induced in the power supply line, and stores the current or voltage induced by the lightning incidence and lightning in accordance with the signal of the sensing unit together with the date and time in the memory. It characterized in that it further comprises a display unit for displaying so that.

The sensing unit may include any one of a photo coupler, a relay, a semiconductor switch element, and a comparator connected in parallel to an input line of the arrester.

The sensing unit may include a photo coupler formed by closely installing an optical sensing element in the arrester or a thermal coupler formed by closely installing a heat sensitive element in the arrester.

The sensing unit may include a current transformer or a transformer installed at an input side or an output side line of the arrester, and a rectifier connected to an output side of the current transformer or the transformer.

The photo coupler may further include an optical cable provided to form an optical transmission path between the arrester and the light detecting element.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a circuit diagram schematically illustrating a lightning count device according to a first embodiment of the present invention. The power supply unit 10, the first power interrupter 20, the system 30, and the second power interrupter 40 are shown in FIG. ), Lightning arrester 50, lightning count unit 60, and pilot lamp PL.

The power supply unit 10 supplies a driving power of direct current or alternating current through a power supply line.

The first power cut-off unit 20 is connected to the power supply unit 10, and the contact is cut off when the power supplied from the power supply unit 10 is equal to or greater than a set allowable current to cut off the power supplied from the power supply unit 10.

The system 30 is connected to the first power interrupter 20 and is driven by the power supplied from the power supply unit 10 through the first power interrupter 20 to perform various functions.

The second power cut-off unit 40 is connected in parallel to the power line between the first power cut-off unit 20 and the system 30, and the contact is cut off when the power supplied through the power line is equal to or greater than the set lowering current. Shut off the supply.

The arrester 50 is composed of an arc spark gap, a gas-filled glass tube, a metal oxide varistor (MOV), a transient voltage suppressor (TVSS), a surgeon, and a second power source. It is connected to the circuit breaker 40 and is grounded, and it does not operate in a normal power supply state, but operates when an overcurrent flows due to a lightning strike to extinguish the overcurrent caused by lightning induced in a power line through the ground, and thus the terminal of the system 30. Reducing the voltage below the breakdown voltage prevents breakdown of the system 30 and protects the system 30.

The lightning count unit 60 includes a photodiode PD, which is a light generating element connected in parallel between the lightning arrester 50 and the second power cut-off unit 40, and a phototransistor, which is a photodetection element disposed in close proximity to the photodiode PD. PT) consists of a photo coupler 61, which is a sensing unit for detecting the current or voltage induced in the power supply line due to the lightning inflow state and lightning strike in conjunction with the lightning arrester 50, and the number of lightning inflows in accordance with the signal of the photo coupler 61 And a display unit 62 which stores the current or voltage induced by the lightning in the memory together with the date and time, and displays the information so that the user can know the operation of the lightning arrester 50 when the lightning strikes the power line. In conjunction with, the number of lightning inflows and inrush currents and voltages are stored with the date and time and displayed for the user to know.

The pilot lamp PL is connected in parallel between the second power interrupter 40 and the arrester 50, and according to the operating state of the first power interrupter 20 and the second power interrupter 40, Display the power supply status from 10) for the user to know.

An operation process of the lightning count device according to the first embodiment of the present invention configured as described above will be described.

The photodiode PD generates light because a signal having a predetermined potential by the power supply unit 10 flows into the photodiode PD in a normal state in which there is no inflow of an overcurrent. Then, the photo transistor PT installed close to the photo diode PD is turned on, and a signal having a "high" level is applied to the display unit 62.

In this state, when an overcurrent caused by lightning strikes the power supply line, the lightning arrester 50 operates to discharge the overcurrent caused by the lightning induced in the power supply line to the ground, thereby reducing the terminal voltage of the system 30 to less than the breakdown voltage. The system 30 is protected by preventing dielectric breakdown of the 30.

At the same time, since the current flowing into the photodiode PD is blocked by the operation of the arrester 50, the photodiode PD stops generating light, and thus the phototransistor PT is turned off. Therefore, the signal applied to the display unit 62 changes from the "high" level to the "low" level signal, and when it changes from the "high" level to the "low" level, that is, when an overcurrent caused by lightning strikes. 62 increases the counted number of lightning inflows. After storing the increased count coefficient (the number of lightning inflows) and the date and time at the same time, the user can confirm the number of lightning inflows and the date and time when the lightning flows when there is a request for information display by the user. Mark it so that it In addition, the display unit 62 allows the user to know when the counted number of lightning inflows exceeds the set number of times, so that the system 30 may cause fatal damage by accumulating stress due to an overcurrent inflow caused by lightning. I will be able to perform immediate maintenance.

In addition, the user can easily grasp the power supply state to the system 30 and the state of each contact point according to the lighting of the pilot lamp PL.

In the first embodiment, the sensing unit which detects the current or voltage induced in the power supply line due to the lightning inflow state and the lightning strike in conjunction with the lightning arrester 50 is formed as the photo coupler 61. However, a semiconductor switch element such as a transistor is different. The photo coupler 61 may also be variously formed as a light generating device such as a lamp other than the photodiode PD and the photo transistor PT and a light detecting device such as a photoconductive cell. It may be.

FIG. 3 is a circuit diagram schematically illustrating a lightning count device according to a second embodiment of the present invention. In the first embodiment of FIG. The lightning arrester 50 itself is used as the light generating element of the photo coupler 61, which is a sensing unit for detecting the current or voltage, and a phototransistor PT, which is a light detecting element, is provided in close proximity to the arrester 50.

In the second embodiment, the photo transistor PT maintains a turn-off state in a state where no overcurrent flows due to a lightning strike, so that the display unit 62 maintains a signal input having a "low" level.

However, when an overcurrent caused by a lightning strike flows into the system 30, the lightning arrester 50 operates to discharge the overcurrent caused by the lightning induced in the power supply line to ground, thereby reducing the terminal voltage of the system 30 to less than the breakdown voltage. The system 30 is protected by preventing dielectric breakdown of the system 30.

At the same time, the photo transistor PT is turned on by the arc light generated by the operation of the arrester 50, and the signal potential of the "low" level of the signal input terminal of the display unit 62 is changed to the "high" level. . Then, the display section 62 increases the number of lightning inflows counted as in the first embodiment. After storing the increased count coefficient (the number of lightning inflows) and the date and time at the same time, the user can confirm the number of lightning inflows and the date and time when the lightning flows when there is a request for information display by the user. Mark it so that it In addition, the display unit 62 allows the user to know when the counted number of lightning inflows exceeds the set number of times, so that the system 30 may cause fatal damage by accumulating stress due to an overcurrent inflow caused by lightning. I will be able to perform immediate maintenance.

In this second embodiment, it is preferable that the arrester 50 uses an arrester such as an arc spark gap or a gas field glass tube for generating arc light.

In addition, when using the photoconductive cell as the photodetector element of the photocoupler 61, the display unit 62 may measure the amount of voltage or current induced in the power supply line due to lightning due to the output signal potential of the photoconductive cell, When the photocoupler 61 is formed using the arrester 50, the optical detector may be installed at a long distance through an optical transmission path using an optical cable instead of being installed close to the arrester 50.

In addition, unlike in the second embodiment, the photocoupler is formed using the arrester 50, a thermally sensitive element is installed in close proximity to the arrester 50, and thus the operating state of the arrester through heat generated when the arrester 50 is operated. A thermal coupler may be formed to detect the number of lightning inflows and the amount of voltage or current induced in the power line due to the lightning strike.

FIG. 4 is a circuit diagram schematically illustrating a lightning count device according to a third embodiment of the present invention. In the first embodiment of FIG. The sensing unit 61 for detecting the current or voltage is configured by using the current transformer CT and the rectifier R. The current transformer CT is installed on an input line of the arrester 50, and the output side of the current transformer CT. Is connected to the display portion 62 via the rectifier R.

In the third embodiment, since no power is supplied to the line on the side of the arrester 50 in the state where there is no overcurrent inflow due to lightning, no current is applied to the display unit 62 through the current transformer CT.

However, when an overcurrent caused by a lightning strike flows into the system 30, the lightning arrester 50 operates to discharge the overcurrent caused by the lightning induced in the power supply line to ground, thereby reducing the terminal voltage of the system 30 to less than the breakdown voltage. The system 30 is protected by preventing dielectric breakdown of the system 30.

At the same time, since current flows in the line on the side of the arrester 50 by the operation of the arrester 50, the current transformer CT converts the current flowing in the line of the arrester side at a predetermined ratio and outputs it. Then, the current output from the current transformer CT is rectified by the rectifier R and then applied to the display unit 62.

In this case, the display unit 62 increases the number of lightning inflows counted as in the first embodiment according to the applied current signal, and checks the amount of current induced in the power line by the lightning in accordance with the applied current signal. In addition, after storing the increased count coefficient (lightning inflow number), the amount of current induced in the power line during lightning inflow, the date and time when the lightning inflow is stored in the memory, and when there is a request for information display by the user, It displays the amount of current induced in the power line and the date and time of lightning inflow so that the user can know when lightning strikes. In addition, the display unit 62 allows the user to know when the counted number of lightning inflows exceeds the set number of times, so that the system 30 may cause fatal damage by accumulating stress due to an overcurrent inflow caused by lightning. I will be able to perform immediate maintenance.

In this third embodiment, the current transformer CT is installed on the input line of the arrester 50. Alternatively, the same result can be obtained by installing the current transformer CT on the output line of the arrester 50. FIG.

In addition, a transformer may be installed on an input side or an output side line of the arrester 50 instead of the current transformer CT. At this time, the display unit 62 displays the induced voltage on the power line when the lightning strikes.

In addition, by installing a current transformer (CT) and a transformer at the input or output side line of the arrester 50 at the same time, it is also possible to display the amount of voltage and current induced in the power supply line at the time of lightning strike.

As described above, the present invention provides the user with an operating state of the lightning arrester which protects the system from the overcurrent caused by the lightning strike, which affects the system, the number of lightning strikes, the voltage or current induced in the power line due to the lightning strike, and the date and time of the lightning strike. In this way, stable system operation can be realized through maintenance before failures such as system breakage and malfunction due to direct or indirect damage caused by lightning inflow.

Claims (5)

A power supply unit for supplying driving power, a first power disconnection unit connected to the power supply unit, and disconnecting power supplied from the power supply unit when the power supplied from the power supply unit is greater than a set allowable current; A system which is driven by the power of the power supply unit supplied from the first power interrupter and performs various functions, and the power connected in parallel to the power line between the first power interrupter and the system and supplied through the power line is set. A second power cut-off unit which cuts off the power supply if the current is higher than that; and a lightning arrester connected to the second power cut-off unit and grounded and operated when an overcurrent flows due to a lightning strike to the power line and extinguishes through the ground, A parallel connection between the second power interrupter and the lightning arrester; and the first power interrupter and the second power interrupter Including a pilot lamp for displaying so that the user knows the power supply state from the power supply according to the operating state of, A sensing unit detecting an amount of voltage or current induced in a power line by a lightning inflow state and a lightning strike in cooperation with the lightning arrester; And a display unit for storing the current or voltage induced by lightning incidence and lightning caused by the sensing unit together with a date and time in a memory and displaying the same so that the user can know. The method of claim 1, wherein the sensing unit, A lightning count device comprising any one of a photo coupler, a relay, a semiconductor switch element, and a comparator connected in parallel to an input line of the arrester. The method of claim 1, wherein the sensing unit, And a photo coupler formed by providing an optical sensing element in close proximity to the arrester, or a thermal coupler formed by installing a heat-sensitive element in proximity to the arrester. The method of claim 3, wherein the photo coupler, And a light cable provided to form a light transmission path between the arrester and the light detecting element. The method of claim 1, wherein the sensing unit, A current transformer or a transformer installed at an input side or an output side line of the arrester; And a rectifier connected to the output side of said current transformer or transformer.