WO2013141429A1

WO2013141429A1 - Device for protecting against a lightning surge for direct current power supply

Info

Publication number: WO2013141429A1
Application number: PCT/KR2012/002241
Authority: WO
Inventors: 우제욱; 서용준; 서재호; 우윤식; 김장주
Original assignee: 주식회사 그라운드
Priority date: 2012-03-21
Filing date: 2012-03-28
Publication date: 2013-09-26
Also published as: KR101184949B1

Abstract

The present invention includes an over-voltage removing unit that removes an over-voltage due to a lightning surge incoming from a plus terminal and from a minus terminal by using a common terminal connected to a ground terminal, an impulse removing unit that removes an impulse due to a lightning surge incoming from the plus terminal and from the minus terminal, and a negative polarity surge removing unit that removes a lightning surge having negative polarity incoming from the plus terminal and from the minus terminal.

Description

Lightning surge protection device for DC power supply

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightning surge protection device for direct current power, and more particularly, to a lightning surge protection device for direct current power that protects a load facility using a direct current power supply from lightning surges.

Recently, various natural disasters have occurred due to rapid climate change caused by environmental pollution. One of these natural disasters is a lightning strike that occurs mainly during the rainy season and is rapidly discharged from a cloud with a positive potential to a cloud with a negative potential or the earth's surface, and the discharged voltage reaches hundreds of thousands of volts. If is unstable it will destroy the target.

The conventional surge protector is composed of a constant voltage element to remove the lightning surge by the operation of the overvoltage of the lightning surge, and in the case of the DC power supply, the positive lightning surge is removed, but the lightning surge having the negative polarity is not removed.

In particular, when the DC power supply is used, there is a problem that the protection against the AC component of the lightning surge having an impulse characteristic of high frequency is not sufficient, and thus the load equipment such as the telecommunication information and information facilities cannot be safely protected.

Background art related to the present invention is a 'lightning protection method and apparatus of a communication device' of Republic of Korea Patent Publication No. 10-2003-0021890 (2003.03.15).

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the forward semiconductor characteristics of the diode in the case of removing the overvoltage and overcurrent due to the lightning surge and having a negative lightning surge with respect to the original positive electrode of each of the DC power lines The purpose of the present invention is to provide a lightning surge protection device for a DC power supply which removes a negative surge by using a high voltage and removes an AC component having a high frequency impulse characteristic by using a fast operating characteristic of a capacitor.

Lightning surge protection device for a DC power supply according to an aspect of the present invention includes an overvoltage removing unit for removing the overvoltage by the lightning surge drawn from the positive terminal and the negative terminal to the common terminal connected to the ground terminal; An impulse removal unit for removing impulses caused by lightning surges introduced from the positive terminal and the negative terminal; And a negative surge removing unit for removing a lightning surge having negative polarities drawn from the positive terminal and the negative terminal.

The overvoltage removing unit includes a first constant voltage device connected between the common terminal and the plus terminal; And a second constant voltage device connected between the common terminal and the negative terminal, wherein the first constant voltage device and the second constant voltage device are connected in series.

The first constant voltage device and the second constant voltage device of the present invention include a gas discharge tube (GDT), a metal oxide varistor (MOV), a zener diode, a silicon controlled rectifier (Silicon Controlled). Rectifier: SCR, Varistor (Varistor), Triac (Triac) and Arrester (Arrester) is characterized in that any one.

The impulse removing unit of the present invention includes a first capacitor connected between the common terminal and the plus terminal; And a second capacitor connected between the common terminal and the negative terminal, wherein the first capacitor and the second capacitor are connected in series.

The negative polarity surge removing unit of the present invention includes: a first diode connected in a reverse direction to the plus terminal between the common terminal and the plus terminal; And a second diode connected in a reverse direction to the plus terminal between the common terminal and the negative terminal, wherein the first diode and the second diode are connected in series.

The present invention may further include a third constant voltage device connected between the ground terminal and the common terminal.

The third constant voltage device of the present invention is a gas discharge tube (GDT), a metal oxide varistor (MOV), a zener diode, a silicon controlled rectifier (SCR), a varistor It is characterized in that any one of (Varistor), Triac (Triac) and Arrester (Arrester).

The common terminal of the present invention is connected to the load-side common terminal provided in the DC load facility, the ground terminal is characterized in that connected to the load-side ground terminal provided in the DC load facility.

The common terminal of the present invention is connected to the load-side common terminal provided in the DC load facility, the ground terminal is characterized in that connected to the ground of the reference potential of the electrical circuit system provided outside the DC load facility.

The present invention further includes a switching unit connected to the positive terminal and the negative terminal in series to block an overcurrent.

The present invention eliminates the overvoltage / overcurrent caused by the lightning surge and removes the negative surge by using the forward semiconductor characteristics of the diode in the case of having the negative lightning surge with respect to the original positive electrode of each of the DC power lines. In addition, the present invention removes an AC component having an impulse characteristic of a high frequency by using a fast operation characteristic of the high frequency of the capacitor. Through this, the present invention can effectively protect and stably operate the electrical and electronic communication information facilities that are DC load facilities from lightning surges.

1 is a circuit diagram of a lightning surge protection device for a DC power supply according to an embodiment of the present invention.

2 is a view showing an example in which a lightning surge protection device for a DC power supply according to an embodiment of the present invention is installed in a DC load facility.

3 is a view showing another example in which a lightning surge protection device for a DC power supply according to an embodiment of the present invention is installed in a DC load facility.

Hereinafter, a lightning surge protection device for a direct current power source according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is a circuit diagram of a lightning surge protection device for a DC power supply according to an embodiment of the present invention, Figure 2 is a view showing an example in which a lightning surge protection device for a DC power supply according to an embodiment of the present invention is installed in a DC load facility 3 is a view showing another example in which a lightning surge protection device for a DC power supply according to an embodiment of the present invention is installed in a DC load facility.

As shown in FIG. 1, an overvoltage removing unit 50, an impulse removing unit 60, a negative surge removing unit 70, and a third constant voltage device are illustrated in FIG. 1. 80 and the switching unit 90.

When the overvoltage having high frequency characteristics such as lightning and surge flows into the line of the DC power supply 200, the overvoltage removing unit 50 receives an overvoltage caused by a lightning surge introduced into the positive terminal 10 and the negative terminal 40. This eliminates the voltage / current of the large-capacity lightning surge and prevents the impulse removal unit 60 and the negative surge removal unit 70 from being damaged by the lightning surge.

The overvoltage remover 50 is connected to the common terminal 20 connected to the ground terminal 30 between the positive terminal 10 and the negative terminal 40 connected to the DC power supply 200.

The overvoltage remover 50 includes a first constant voltage element 51 and a second constant voltage element 52. For reference, the positive terminal 10 is connected to the positive electrode of the DC power source 200, the negative terminal 40 is connected to the negative electrode of the DC power source 200.

The first constant voltage element 51 and the second constant voltage element 52 may include a gas discharge tube (GDT), a metal oxide varistor (MOV), a zener diode, a silicon controlled rectifier ( Silicon Controlled Rectifier (SCR), Varistor, Triac and Arrester may be employed.

The first constant voltage element 51 is connected between the common terminal 20 and the plus terminal 10 and in parallel with the plus terminal 10. In addition, the second constant voltage device 52 is connected between the common terminal 20 and the negative terminal 40 and connected in parallel with the negative terminal 40. In this case, the first constant voltage element 51 and the second constant voltage element 52 are connected in series. That is, the common terminal 10 is connected between the first constant voltage element 51 and the second constant voltage element 52 connected in series.

The third constant voltage device 80 is connected to the common terminal 20, and is connected between the ground terminal 30 and the common terminal 20 to block overvoltage applied to the common terminal 20.

The third constant voltage device 80 may include a gas discharge tube (GDT), a metal oxide varistor (MOV), a zener diode, a silicon controlled rectifier (SCR), Varistor, Triac and Arrester can be employed.

The impulse removing unit 60 removes the AC component of the lightning surge having the impulse characteristic of the high frequency introduced into the positive terminal 10 and the negative terminal 40 by rapidly charging and discharging in response to the high frequency of the AC component. The common terminal 20 is connected between the terminal 10 and the negative terminal 40.

The impulse removing unit 60 includes a first capacitor 61 and a second capacitor 62, and the first capacitor 61 is connected between the common terminal 20 and the plus terminal 10 and has a plus terminal ( 10) is connected in parallel. The second capacitor 62 is connected between the common terminal 20 and the negative terminal 40 and in parallel with the negative terminal 40. In this case, the first capacitor 61 and the second capacitor 62 are connected in series. That is, the common terminal 20 is connected between the first capacitor 61 and the second capacitor 62 connected in series.

The negative surge removing unit 70 removes a lightning surge having negative polarity introduced into the positive terminal 10 and the negative terminal 40, and includes a first diode 71 and a second diode 72. .

The first diode 71 is connected between the common terminal 20 and the plus terminal 10 and in parallel with the plus terminal 10. The second diode 72 is connected between the common terminal 20 and the negative terminal 40 and in parallel with the negative terminal 40. In this case, the first diode 71 and the second diode 72 are connected in series. That is, the first diode 71 and the second diode 72 are connected in series, and the common terminal 20 is connected between the first diode 71 and the second diode 72.

In particular, the first diode 71 and the second diode 72 are connected in a reverse direction to the plus terminal 10. That is, the positive terminal 10 is connected to the cathode side and the negative terminal 40 is connected to the anode side and configured in the forward direction with respect to the negative surge opposite to the polarity of the DC power supply 200. As a result, the negative surge can be removed.

The switching unit 90 is connected in series to the plus terminal 10 and the minus terminal 40, respectively, to block an overcurrent caused by a lightning surge. The switching unit 90 includes a first switch 91 connected in series with the positive terminal 10 and a second switch 92 connected in series with the negative terminal 40. The overcurrent applied to the negative terminal 40 can be cut off.

Lightning surge protection device for a DC power supply according to an embodiment of the present invention as described above is installed in the DC load facility 100, it can be variously installed depending on whether the ground terminal is provided in the DC load facility (100). Can be.

First, in the case where the load-side common terminal 110 and the load-side ground terminal 120 are provided in the DC load facility 100, the common terminal 20 is connected to the DC load facility 100. The load-side common terminal 110 is connected, and the ground terminal 30 is connected to the load-side ground terminal 120 connected to the ground 130.

On the other hand, when the DC load facility 100 is not provided with the load side common terminal 110 and the load side ground terminal 120, as shown in Figure 3, the common terminal 20 is the DC load facility 100 Is connected to the common terminal 110 of the load side, and the ground terminal 30 is connected to the ground 130 to constitute the electrical circuit of the DC load facility 100, and the ground so that the reference potential of the electrical circuit system is the equipotential The circuit can be configured.

Although the present invention has been described with reference to the embodiments shown in the drawings, it is merely exemplary and various modifications and equivalent other embodiments are possible for those skilled in the art to which the art pertains. Will understand. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

Claims

An overvoltage removing unit for removing an overvoltage caused by a lightning surge introduced from the positive terminal and the negative terminal;

An impulse removal unit for removing impulses caused by lightning surges introduced from the positive terminal and the negative terminal; And

Including a negative surge removal unit for removing a lightning surge having a negative polarity introduced from the positive terminal and the negative terminal,

The overvoltage remover, the impulse remover and the negative surge remover are connected to a common terminal.
The method of claim 1, wherein the overvoltage remover

A first constant voltage device disposed between the common terminal and the plus terminal; And

A second constant voltage device is provided between the common terminal and the negative terminal,

And a first constant voltage element and the second constant voltage element are connected in series.
The method of claim 2, wherein each of the first constant voltage device and the second constant voltage device includes a gas discharge tube (GDT), a metal oxide varistor (MOV), a zener diode, and silicon control. Lightning surge protection device for DC power supply, characterized in that any one of a rectified element (Silicon Controlled Rectifier (SCR), Varistor, Triac and Arrester).
The lightning surge protection device of claim 2, further comprising a third constant voltage element disposed between the ground terminal and the common terminal.
The method of claim 4, wherein the third constant voltage device includes a gas discharge tube (GDT), a metal oxide varistor (MOV), a zener diode, a silicon controlled rectifier (SCR). ), Varistor (Varistor), Triac (Triac) and Arrester (Arrester) any one of the surge protection device for direct current power.
The method of claim 1, wherein the impulse removal unit

A first capacitor provided between the common terminal and the plus terminal; And

A second capacitor installed between the common terminal and the negative terminal,

And the first capacitor and the second capacitor are connected in series.
The method of claim 1, wherein the negative surge removal portion

A first diode connected in a reverse direction to the plus terminal between the common terminal and the plus terminal; And

A second diode connected in a reverse direction to the negative terminal between the common terminal and the negative terminal,

And a first diode and the second diode are connected in series.
The method of claim 1,

Further comprising a constant voltage device installed between the ground terminal and the common terminal,

The common terminal is connected to the load-side common terminal provided in the DC load facility, the ground terminal is connected to the load-side ground terminal provided in the DC load facility, the surge protection device for DC power supply.
The method of claim 1,

Further comprising a constant voltage device installed between the ground terminal and the common terminal,

The common terminal is connected to the load-side common terminal provided in the DC load facility, the ground terminal is a lightning surge protection device for DC power supply, characterized in that connected to the ground of the reference potential of the electrical circuit system provided outside the DC load facility.
The lightning surge protection device of claim 1, further comprising a switching unit connected to the plus terminal and the minus terminal in series to block an overcurrent.