KR101625493B1

KR101625493B1 - An electric shock prevention and leakage current limiting device having no limitation in arrangement and shape of conductors

Info

Publication number: KR101625493B1
Application number: KR1020150157954A
Authority: KR
Inventors: 이호석
Original assignee: (주)비젼테크
Priority date: 2015-11-11
Filing date: 2015-11-11
Publication date: 2016-05-30

Abstract

The present invention relates to an electric shock prevention and leakage current limiting device which is not limited in arrangement and shape of a conductor. More specifically, both of the conductors take the form of a flat plate, which overcomes the limitations of the applicant's existing patent that the two plates are parallel to each other, and even when the pair of conductors is not a flat plate like a zigzag Experimental demonstration that it is possible to prevent electric shock and limit the leakage current even if they are not parallel to each other, including being applied and vertically arranged, so that there is no restriction on the arrangement and shape of the conductor, And to an electric shock prevention and leakage current limiting device which is not limited in shape.
To this end, the present invention provides a power converter comprising: a first input terminal electrically connected to a current path from a power source to a load, the first input terminal being connected to a first input wire; A first output terminal to which an output-side first wire is connected; A second input terminal to which the input-side second wire is connected; A second output terminal to which an output-side second wire is connected; A first conductor electrically connected to the first input terminal at one end and electrically connected to the first output terminal at the other end; The first conductor is electrically connected to the second input terminal and the other end is electrically connected to the second output terminal and is electrically isolated from the first conductor and arranged parallel to and perpendicular to the first conductor, And a second conductor including a flat plate and having no shape limitation, the present invention provides an electric shock preventive and leakage current limiting device that is not limited in arrangement and shape of a conductor.

Description

An electric shock prevention and leakage current limiting device having no restriction on the arrangement and shape of a conductor.

The present invention relates to an electric shock prevention and leakage current limiting device which is not limited in arrangement and shape of a conductor. More specifically, both of the conductors take the form of a flat plate, which overcomes the limitations of the applicant's existing patent that the two plates are parallel to each other, and even when the pair of conductors is not a flat plate like a zigzag Experimental demonstration that it is possible to prevent electric shock and limit the leakage current even if they are not parallel to each other, including being applied and vertically arranged, so that there is no restriction on the arrangement and shape of the conductor, And to an electric shock prevention and leakage current limiting device which is not limited in shape.

Electric shock is a phenomenon in which the human body reacts when the current flowing from the power source through the human body to the ground surface is greater than a predetermined value. Generally, currents exceeding 15mA cause spasticity and more than 50mA lead to death. The main cause of death is a heart attack in which the heart stops working as current through the heart damages the nerve. The risk of electric shock is related to the resistance of the human body when energized, which is highly dependent on the condition of the skin.

When an electric equipment is immersed in water When a human body touches a metal housing or the like which is energized through the water or water, electric current flows from the exposed conductor of the electric equipment through the water and the human body to the ground surface. At this time, the human body is likely to be wet with rain, and in this case, the contact resistance is extremely low, which is very dangerous.

The present applicant has disclosed an electric shock prevention device in Korean Patent Registration No. 1400711 (published on Apr. 27, 201, entitled "Electric Shock Absorber for Electric Equipment"). In the prior art, two parallel planar conductors are provided in a state of being electrically separated from each other on a current carrying path so that the amount of current flowing between the two planar conductors is much larger than the amount of current flowing to the ground plane through the human body Thereby preventing electric shock.

The prior art has the following disadvantage in that i) the two conductors take the shape of a flat plate, and ii) the two flat plates are parallel to each other.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an apparatus for preventing electric shock and limiting a leakage current without limiting the arrangement and shape of a conductor to a specific state.

According to an aspect of the present invention, there is provided an electric shock prevention and leakage current limiting device, which is electrically connected to a current path from a power source to a load, the input side first electric wire is connected A first input terminal; A first output terminal to which an output-side first wire is connected; A second input terminal to which the input-side second wire is connected;

A second output terminal to which an output-side second wire is connected; A first conductor electrically connected to the first input terminal at one end and electrically connected to the first output terminal at the other end; The first conductor is electrically connected to the second input terminal and the other end is electrically connected to the second output terminal and is electrically isolated from the first conductor and arranged parallel to and perpendicular to the first conductor, And includes a second conductor having no shape limitation including a flat plate.

Also, the power source is an AC power source, and one of the first conductor and the second conductor is P-phase and the other is N-phase, and the second conductor can take a folded shape or a warped shape including a zigzag shape.

According to the present invention, both of the conductors take the shape of a flat plate, and the two flat plates are parallel to each other. In order to overcome the limitations of the present applicant's conventional patent, even when the pair of conductors is not a flat plate shape like a zigzag It is possible to prevent the electric shock and limit the leakage current even if they are not parallel to each other including the applied and vertically arranged ones.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a layout diagram for testing an anti-shock and leakage current limiting device having no restriction on the arrangement and shape of conductors according to a preferred embodiment of the present invention;
FIG. 2 is a graph showing an experimental result of an electric shock prevention and leakage current limiting device having no limitation on the arrangement and shape of the conductor according to the first embodiment of the present invention,
FIG. 3 is a graph showing an experimental result of an electric shock prevention and leakage current limiting device having no arrangement and configuration of conductors according to a second embodiment of the present invention,
FIG. 4 is a graph showing an experimental result of an electric shock prevention and leakage current limiting device having no restriction on the arrangement and shape of the conductor according to the third embodiment of the present invention. FIG.
FIG. 5 is a graph of experimental results of an anti-shock and leakage current limiting device having no limitation on the arrangement and shape of the conductor according to the fourth embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be variously modified by those skilled in the art.

AC power generated by a power plant is three power (three phase power) with a phase difference of 360 degrees (120 degrees) in an electric space.

Generally, in a three-phase four-wire distribution line, one phase of three-phase power is selected (single phase power) and a common line is shared (Neutral Line, Neutral Line).

In the neutral line, three currents flowing in three-phase power flow in common. However, these three currents have an electrical phase difference of 120 degrees.

If the three currents are the same (if the three loads have the same load), then the vector sum of the three currents is zero, so no current seems to flow.

However, since the three currents are not the same due to the difficulty of imposing the same load on the three phases, the vector sum of the three currents is difficult to become zero. That is, a current flows through the neutral line. That is, in the distribution line, a three-phase alternating current circuit is formed and connected so that the ends of each of the three single-phase systems are connected to form a single neutral point. When the loads of the three single-phase systems are balanced, no current flows through the neutral line. However, most of the unbalanced loads are connected, and in this case, the neutral current, which is generally smaller than the line current, flows (Source: Power Transmission Engineering, Bong Yong, Moon Moon, pp.13 ~ 17)

The phase line and the neutral line are conductors with small resistance, but have long self-impedance because they are long and they are arranged in a meandering way.

The ground line refers to a line connected to the ground (earth).

Leakage current refers to the current flowing through a path other than the phase line or the neutral line. The grounding current or earth current is the resistance between the phase line and the neutral line and the ground (earth) it means.

An electric shock is an accident caused by a current flowing to the ground via a human body (the body has high conductivity) on a commercial line or a neutral line. Leakage current flows to the ground through the human body and causes earth current, so leakage current causes electric shock.

Interphase current is the current between one phase and the neutral. As the current flows into the human body through the water due to flooding or the like, an electric shock occurs. Therefore, the phase current causes the electric shock as well as the leakage current.

An electric shock preventive and leakage current limiting device having no arrangement and configuration according to a preferred embodiment of the present invention is electrically connected to a current path from a power source to a load and includes a first conductor and a second conductor. Of course, the anti-shock and leakage current limiting device of the present invention can be connected to the transmission path or the distribution path without limitation in the arrangement and shape.

The first electric wire is electrically connected to both ends of the first electric conductor. An input-side first electric wire is electrically connected to one end of the first conductor and an output-side first electric wire is electrically connected to the other end of the first conductor.

Meanwhile, the first conductor may include a first input terminal and a first output terminal for electrical connection between the first wire and the first conductor. The first input terminal electrically connects the input-side first wire to the first conductor, and the first output terminal electrically connects the output-side first wire to the first conductor.

Similarly, the second electric wire is electrically connected to both ends of the second electric conductor. The input side second wire is electrically connected to one end of the second conductor and the output side second wire is electrically connected to the other end of the second conductor.

The second conductor may have a second input terminal and a second output terminal for electrical connection between the second wire and the second conductor. The second input terminal electrically connects the input-side second wire to the second conductor, and the second output terminal electrically connects the output-side second wire to the second conductor.

When the power source is an AC power source, the first conductor may be configured to be P-phase, and the second conductor may be configured to allow the N-phase power source to flow, and vice versa.

The present invention can also be applied to a DC power source. However, in case of DC power source, the risk of electric shock is relatively low compared to AC power, so it can be used to protect various electric and electronic devices mounted on the printed circuit board rather than the electric shock prevention.

In the case of DC power, the first conductor may be electrically connected to the positive (+) pole of the battery and the second conductor may be electrically connected to the negative pole of the battery (and vice versa). In this case, when the first conductor and the second conductor, the battery, and the load (including the electric and electronic elements of the printed circuit board) are submerged, the positive electrode of the battery, the electric and electronic elements of the printed circuit board, The amount of current flowing through the water existing between the first conductor connected to the positive pole of the battery and the second conductor connected to the negative pole of the battery is larger than the amount of current flowing through the closed circuit of the battery, It is possible to prevent the electric / electronic device from being damaged.

Returning to the alternating current power supply again, the first conductor is formed in a flat plate shape. One end of the first conductor is electrically connected to the first input terminal and the other end is electrically connected to the first output terminal.

One end of the second conductor is electrically connected to the second input terminal, and the other end is electrically connected to the second output terminal. The second conductor may be electrically isolated from the first conductor, and may be parallel, perpendicular, or oblique to the first conductor. That is, the arrangement of the second conductor with respect to the first conductor is irrelevant.

In addition, the second conductor includes not only the flat plate but also the shape including the folded shape (regardless of the number of folds) or the bent shape like the zigzag shape.

It has been confirmed by the following experiment that the present invention can be applied irrespective of the arrangement of the second conductor with respect to the first conductor and can be applied irrespective of the shapes of the first conductor and the second conductor.

Since it is not possible to perform experiments on the number of all cases, the leakage current test was divided into four cases in this experiment. The first conductor to which the P phase is connected is fixed in a plate shape, and the arrangement form of the second conductor to which the N phase is connected is divided horizontally and vertically. Also, the first conductor to which the P phase is connected is fixed in a plate shape, and the shape of the second conductor to which the N phase is connected is classified into a flat plate and a zigzag shape.

The leakage current was measured in the same manner as in Fig.

1, the water tank 502 is filled with water, and an electric shock prevention and leakage current limiting device (hereinafter referred to as "device") 503, And the lamp 505 at the other end was exposed to the outside of the water tank. At this time, plug 501 is connected to a power outlet to supply power. At this time, it can be confirmed that the lamp 505 is lit even though the apparatus 503 is immersed in water. Next, the experimenter 509 grasps the exposed end of the electric wire and measures the current flowing through the electric wire with the ammeter 507 while the exposed end is immersed in the water tank. It may be dangerous if the experimenter (509) conducts the experiment directly, so it may be replaced by an animal having a similar conductive property to the human body instead of the human body. The power source was a commercial power source of 220 V / 60 Hz and the load was connected to a 120 W incandescent lamp. In each experiment, the distance of the second conductor to the first conductor was changed and the second conductor The leakage current (unit: mA) was measured while varying the area ratio of the sieve.

In the first embodiment, both the first conductor and the second conductor are in the shape of a flat plate and arranged parallel to each other. The experimental data are summarized in Table 1 below. The horizontal axis represents the distance between the first conductor and the second conductor, and the longitudinal axis represents the area ratio of the second conductor to the area of the first conductor. Fig. 2 is a graph showing the data of Table 1. Fig.

Referring to Table 1 and FIG. 2, when the distance between the first conductor and the second conductor is 5 cm, significant data are obtained from the moment when the area of the second conductor is six times that of the first conductor, As the sieve area increased, the leakage current decreased. On the other hand, as the distance between the first conductor and the second conductor increases in the meaningful data, the magnitude of the leakage current increases.

In Embodiment 2, both the first conductor and the second conductor are flat and arranged perpendicular to each other. The experimental data are summarized in Table 2 below, and FIG. 3 is a graph showing the data in Table 2.

Referring to Table 2 and FIG. 3, when the distance between the first conductor and the second conductor was 5 cm, significant data were calculated from the moment when the area of the second conductor was 15 times that of the first conductor. As in the example, the leakage current decreases with increasing area of the second conductor.

In Embodiment 3, the first conductor is in a flat plate shape, the second conductor is in a zigzag shape, and arranged so as to be parallel to each other. The experimental data is summarized in Table 3 below, and FIG. 4 is a graph of the data in Table 3. [

Referring to Table 3 and FIG. 4, it can be seen that although there is a specific numerical difference, a tendency similar to that of Example 1 is shown.

In Embodiment 4, the first conductor is in the form of a flat plate, the second conductor is in a zigzag form, and arranged so as to be perpendicular to each other. The experimental data are summarized in Table 4 below, and FIG. 5 is a graph showing the data of Table 4.

Referring to Table 4 and FIG. 5, it can be seen that although there is a specific numerical difference, a tendency similar to that of Example 2 is shown.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

501 - Plug
502 - Tank
503 - Device
505 - Lamp
507 - Ammeter
509 - Experimenters
511 - Ground circuit

Claims

And is electrically connected to an energizing path from the power source to the load,
A first input terminal to which an input-side first wire is connected;
A first output terminal to which an output-side first wire is connected;
A second input terminal to which the input-side second wire is connected;
A second output terminal to which an output-side second wire is connected;
A first conductor electrically connected to the first input terminal at one end and electrically connected to the first output terminal at the other end; And
The first conductor is electrically connected to the second input terminal and the other end is electrically connected to the second output terminal and is electrically isolated from the first conductor and arranged parallel to and perpendicular to the first conductor, And a second conductor having no shape limitation including a flat plate
Lt; / RTI >
Wherein the power source is an alternating current power source, wherein one of the first conductor and the second conductor is a P-phase and the other is an N-phase, and the second conductor has a folded or warped shape including a zigzag shape, Shock resistant and leakage current limiting device with unlimited geometry.

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