KR19990081089A - Lightning and overvoltage detector - Google Patents

Abstract

An apparatus for detecting lightning and overvoltage for protecting a system, comprising: a system driven by a power supply for supplying driving power and a power supplied from the power supply; and connected between the power supply and the system to protect against lightning and overvoltage. A first power cut-off unit including an arrester installed to protect the system, the first power cut-off unit positioned between the power supply unit and the system to block the primary power supply when a power supply exceeding the allowable current is supplied; A second power cut-off unit positioned between the first power cut-off unit and the lightning arrester to block the inflow of power when a power exceeding an allowable current flows in; It is located between the second power interrupter and the lightning arrester further comprises a lightning and overvoltage detection unit for detecting and outputting the minute surge voltage due to overvoltage, overcurrent and lightning, to install a lightning arrester to protect the system from lightning and overvoltage A conventional technology further includes a lightning and overvoltage detection unit that can accurately detect minute surge voltages and overvoltage flows due to lightning strikes, thereby detecting the number of times a problem occurs due to lightning and overvoltages by year, month, and day. It provides data and convenience for system maintenance.

Description

Lightning and overvoltage detector

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system protection device, and more particularly, to an apparatus for detecting lightning and overvoltage, which protects a system from surge voltage, overvoltage, and overcurrent caused by lightning flowing through a power line, and provides convenience for maintenance of the system.

In general, the term "system" refers to a device that uses an external power source as a power source for home appliances and expensive production and electrical and electronic operation facilities.

When surge voltage is generated due to lightning or other causes of power supplied to such a system, an expensive system is damaged or malfunctions, which causes a fatal effect on system operation.

Therefore, in the prior art, a lightning arrester 3 is installed between the system 2 and the power supply 1 for supplying external power as shown in FIG. 1 to minimize the damage of the system. The system 2 is protected from surge voltages and overvoltages.

However, the above arrangement protects the system 2 as lightning and overvoltages directly affecting the system 2 are absorbed and extinguished into the ground through the arrester 3, but the arrester 3 In the case of a surge voltage that flows finely below a constant voltage without being extinguished by it, the surge flows into the system to provide indirect damage to the system. That is, a minute surge voltage below a certain voltage that is not extinguished by the arrester 3 flows into the above-described system 2 and does not immediately cause external failure or damage, but internally causes data loss or deadly stress accumulation to the hardware. The unexpected problem is that the system 2 is damaged or malfunctioned at an unexpected time to stop the operating state of the system 2 and provide enormous damage.

Accordingly, an object of the present invention is to solve the above problems, and to protect the system from lightning and overvoltage which directly affects the conventional system, and furthermore, it is not fixed by lightning, overvoltage and lightning arrester. The present invention provides a lightning and overvoltage detection device capable of realizing stable system operation through maintenance before occurrence by detecting minute surge voltage inflow times below voltage and causing problems of system breakage and malfunction.

1 is a general circuit block diagram configured to protect the equipment from lightning and overvoltage,

2 is a detailed circuit diagram for detecting lightning and overvoltage according to an embodiment of the present invention;

3 is a block diagram illustrating a system configuration of the lightning and overvoltage detection apparatus of FIG. 2 according to an exemplary embodiment of the present invention.

The present invention for achieving the above object, the system is driven by a power supply for supplying a driving power and the power supplied from the power supply, and is connected between the power supply and the system to protect the system from lightning and overvoltage A first power cut-off unit including an arrester installed to cut off the first power supply when a power supply greater than an allowable current is provided between the power supply unit and the system; A second power cut-off unit positioned between the first power cut-off unit and the lightning arrester to block the inflow of power when a power exceeding an allowable current flows in; It is characterized in that it further comprises a lightning and overvoltage detection unit located between the second power interrupter and the arrester to detect and output the minute surge voltage due to overvoltage, overcurrent and lightning.

With reference to the accompanying drawings an embodiment of the present invention that can specifically achieve and achieve the above object will be described in detail.

As shown in FIG. 2, the apparatus for detecting lightning and overvoltage according to an exemplary embodiment of the present invention includes a power supply unit 10 for supplying driving power through a power line, and one side connected to the power supply unit 10. The driving power supplied from the power supply unit 10 is connected to the other side of the first blocking unit 20 and the first blocking unit 20 to block the contact when the power to be set is equal to or greater than a predetermined allowable current. The contact point is connected to the system 30 driven by one side and one side is connected between the first blocking unit 20 and the system 30 so that the power supplied from the power supply unit 10 is equal to or greater than a predetermined allowable current. The second blocking unit 40 is cut off, and one side is connected to the other side of the second blocking unit 40, and the other side is grounded with the earth, and the system 30 is prevented from lightning and overvoltage flowing through the power supply unit 10. Arrester 50 for protecting the, and the second It consists of the end 40 and the lightning arrester and the overvoltage detecting section 60 for display by detecting a lightning or overvoltage located between (50).

The secondary power cut-off unit 40 maintains a continuous spark from the transient current to prevent the fuse of the power supply is short-circuited, and is not limited to any one element, but the fuse, thermistor or cut off switch (cut off) s / w).

The lightning and overvoltage detector 60 includes a power display 61, a comparator 62, a reference voltage setting unit 63, a switching unit 64, a counter 65, and the power display 61. One terminal is connected between the second power cut-off unit 40 and the arrester 50, the other terminal is grounded, the power supply state of the power supply unit 10 and the first power cut-off unit 20 and 2 Display on / off according to the contact state of the power cut-off unit 40.

The power display unit 61 displays a power supply state and a contact state of the second power cut-off unit 40 and the arrester 50, and is made of one of predetermined elements.

The comparator 62 has a first input terminal ① connected between the second blocking unit 40 and one terminal of the arrester 50 and the power display unit 61, and the second input terminal ② is a reference. Connected to the voltage setting unit 63, the driving power applied from the power supply unit 10 is input to the first input terminal ① as an input voltage, and the preset reference voltage is input to the second input terminal ②. .

The reference voltage setting unit 63 has one terminal connected to the second input terminal ② of the comparator 62 and the other terminal grounded, so that the reference voltage setting unit 63 is supplied from the power supply unit 10 to the system 30. Losing the output voltage may be arbitrarily changed according to the driving power source.

Switching section in which the first terminal ① of the input terminal is connected to the output terminal ③ of the comparator 62, the second terminal ② is grounded, and the second terminal ④ of the output terminal is grounded. 64 includes a port coupler, and the on / off state is varied according to the output signal output from the output terminal ③ of the comparator 62 and outputs the variable.

The switching unit 64 is not limited to the porter coupler, and a relay or other element may be used.

The counter unit 64 is connected to the first terminal ③ of the output terminal of the switching unit 64, and counts and outputs the number of times according to the on or off state of the switching unit 64.

Referring to the operation of the lightning and overvoltage detection device in the present invention having the function as described above is as follows.

When a predetermined driving power is supplied from the power supply unit 10, the system 30 is driven by the supplied power to perform predetermined operations.

The first power cut-off unit 20 is connected between the power supply unit 10 and the system 30 so that the over-voltage and over-current lightning strikes over the allowable current allowed by the first power cut-off unit 20 in the power supply unit 10. When supplied together, the contact is first shorted to protect the system 30 to block the damage to the system 30.

Subsequently, in the second power interrupter 40, one terminal is connected between the first power interrupter 20 and the system 30, and the other terminal contact is connected to one terminal of the arrester to the arrester 50. The lightning strike, overvoltage and overcurrent protect the main power supply due to short circuit while maintaining a constant spark.

In addition, the lightning and overvoltage detection unit 60 is connected between the second blocking unit 40 and the lightning arrester 50, the power supply state of the power supply unit 10 and the first and The state of the contact point of the second power cut-off unit is preferably displayed as the on / off state of the power lamp so that the user can easily grasp the state.

That is, when the power lamp is in the on state, it indicates that it is normally connected to the arrester, but when the power lamp is in the off state, it indicates that a problem or a transient current has occurred in the power supply state so that repair can be performed immediately.

When the power supply state is normally performed, the comparator 62 compares the first voltage with the reference voltage set in the second input terminal ② using the driving power input to the first input terminal ① as an input voltage. When the input voltage applied to the input terminal ① is greater than the reference voltage preset in the second input terminal ②, the comparator 62 outputs a predetermined control signal to the output terminal ③.

The switching unit 64 is controlled according to the control signal output from the output terminal ③ of the comparator 62 to variably output the stable on / off signal to the first terminal ③ of the output terminal.

The ON / OFF variable output from the first terminal ③ of the output terminal of the switching unit 64 is applied to the counter unit 65 to be turned on or off according to the ON or OFF state signal that is variable output from the switching unit 64. Count and output the number of times.

That is, when the input voltage is input at a voltage higher than the reference voltage, the comparator 62 is counted and outputted by the counter 65 according to the on / off operation of the switching unit 64, and the flow of lightning and overvoltage, More specifically, it is possible to accurately detect the number of flows of the minute surge voltage higher than the reference voltage of the comparator 62 flowing into the system without being destroyed by the arrester 50.

FIG. 3 is a system protection device shown in FIG. 2 installed between each of the power supply 10 and the system 30, and each performs a given task and is caused by surge voltage and overvoltage caused by lightning in the systems. If damage occurs directly or indirectly, the number of damages occurred for each system is counted. If a problem occurs in the system operation due to the direct damage in the system, a "system failure" alarm is generated for the system. When the number of damages counted on the indirectly damaged system reaches the predetermined number of times, the system will generate a "system danger" alarm and perform immediate maintenance to prevent the system from causing fatal damage. One embodiment.

The above embodiments are described as the most preferred embodiments, and the present invention is not limited thereto, and the embodiments can be easily described from the above embodiments.

As described above, the present invention further includes a lightning and overvoltage detection unit capable of accurately detecting the number of flows of minute surge and overvoltage caused by lightning in the conventional technology in which a lightning arrester is installed to protect a system from lightning and overvoltage. By providing the data, it is possible to provide convenience for system maintenance by dataizing the number of times a problem occurs due to lightning and overvoltage by year, month and day.

Claims (2)

A power supply for supplying driving power and a system driven by the power supplied from the power supply, and a lightning arrester connected between the power supply and the system and installed to protect the system from lightning and overvoltage, the power supply A first power cut-off unit disposed between the system and the first power cut-off unit to cut off the primary power supply when power above the allowable current is supplied; A second power cut-off part disposed between the power supply part and the first power cut-off part and short-circuited to prevent damage to the power supply part when a continuous spark occurs due to excessive power inflow over a allowable current; Lightning and overvoltage detection device further comprises a lightning and overvoltage detection unit located between the second power interrupter and the lightning arrester to detect and output the minute surge voltage due to overvoltage, overcurrent and lightning. The power supply of claim 1, wherein the lightning and overvoltage detection unit has one terminal connected between the second power cut-off unit and the lightning arrester, the other terminal is grounded, and outputs a power supply state of a power supply unit and a contact state between the power supply unit and the first lightning protection period. A display unit; The first input terminal is connected between the second blocking unit and one terminal of the lightning arrester and the power display unit, and compares a predetermined control signal by comparing the driving power applied to the first input terminal with a set reference voltage applied to the second input terminal. A comparator for outputting to an output terminal; A reference voltage setting unit having one terminal connected to the second input terminal of the comparator, the other terminal being grounded, and arbitrarily setting a reference voltage according to a system supply power; A switching unit for connecting the first terminal of the input terminal is connected to the output terminal of the comparator, the second terminal is grounded, the second terminal of the output terminal is grounded, and outputs the on / off state in accordance with the control signal output from the comparator Wow; And an input terminal connected to a first terminal of an output terminal of the switching unit, the counter unit comprising a counter unit for counting and outputting the number of ON or OFF states that are variablely output from the switching unit.