KR102028716B1 - Electric wire contact spark detection device and method - Google Patents

Abstract

Disclosed is a device for detecting a spark of an electric wire contact unit capable of detecting a spark due to micro arc in accordance with carbonization resistance which can be generated when an insulation body is damaged in accordance with deterioration of an electric wire, and a method thereof. The present invention minimizes a range of malfunction even if a semiconductor thyristor phase angle control load used for a complex load and a switching mode power supply (SMPS) load of an electronic apparatus are used in parallel so as to effectively prevent fire at a fire vulnerable area such as a traditional market and the like.

Description

ELECTRIC WIRE CONTACT SPARK DETECTION DEVICE AND METHOD

The present invention relates to a spark generation detection device, and more particularly, to detect the occurrence of harmful arc by detecting the micro arc according to the carbonization resistance that can occur when the insulator is damaged due to the aging of the wire spark generation detection An apparatus and method are provided.

In general, the flame arc detection device merely detects the flame arc by relying only on a current sensor, so that malfunctions frequently occur due to a phase control load of an electric appliance power supply voltage, an electronic fluorescent lamp, a commutator mixer, or the like.

In addition, when the load is used in combination with a switching mode power supply (SMPS) for power supply such as a computer, an error range is extended and various problems occur in the process of use, and a portion that is insufficient to be applied to a branch circuit breaker installed in the field is insufficient. Many.

Therefore, various researches are in progress to overcome the above-mentioned problems, and in particular, various technologies for preventing electric fires are required in areas vulnerable to electric fires such as conventional markets.

Republic of Korea Patent Publication No. 10-2007-0005278 (published Jan. 10, 2007)

Therefore, the first object of the present invention to solve this problem is to detect the spark caused by the micro-arc according to the carbonization resistance that can occur when the insulator is damaged by the aging of the wire, can be installed directly in the electrical circuit In addition, when the semiconductor thyristors phase angle control unit used for complex loads and the switching mode power supply (SMPS) load of home appliances are used in parallel, the range of malfunctions is reduced, thereby effectively preventing fires in fire-prone areas such as conventional markets. Electrical wiring that can help, can be checked in real time by an external inspector, and can prevent malfunctions by distinguishing harmful and harmless arcs, and confirming the cause of carbonization of electrical connections and establishing preventive measures It is to provide a contact spark generation detection device.

In addition, the second purpose is to detect sparks caused by fine arcs due to carbonization resistance that may occur when the insulator is damaged due to the aging of the wire, can be installed directly in the electrical circuit, semiconductor thyristors used for complex load Even when the phase angle control unit and the switching mode power supply (SMPS) load of home appliances are used in parallel, the range of malfunctions can be reduced to effectively prevent fire in vulnerable areas such as conventional markets. It is possible to check in real time by distinguishing harmful arcs and harmless arcs, thereby preventing malfunctions, and providing a method for detecting spark occurrence in electrical wiring contacts which can help to identify the cause of carbonization of electrical connections and establish preventive measures. .

In order to achieve the first object of the present invention, the present invention provides a frequency synthesizer, a controller for determining whether an arc of a load stage occurs, a voltage detector for detecting a voltage at the load stage, and a voltage for modulating the voltage detected by the voltage detector with a square wave. And a phase angle zero crossing detector for detecting a phase angle zero crossing point of a square wave modulated by the modulator and the voltage modulator, and transmitting the detected phase angle zero crossing point to the controller. do.

The electrical wire contact part spark generation detection device may include a power cut-off part that cuts off power of the load end when the controller determines that a harmful arc has occurred in the load end.

The electrical wire contact part spark generation detection device may include a communication unit for transmitting a corresponding content to a preset manager terminal when the controller determines that a harmful arc has occurred in the load terminal.

The electrical wire contact part spark generation detection device may include a warning sound generator for generating a warning sound when the controller determines that a harmful arc has occurred in the load end.

The electrical wire contact part spark generation detecting apparatus may include an oscillation frequency generator generating an oscillation frequency and a first amplifier configured to amplify an oscillation frequency generated by the oscillation frequency generator, wherein the first amplifier is configured to control the oscillation frequency amplified. Can be sent by

The electrical wire contact part spark generation detection device includes a ferrite sensor unit for detecting a signal generated from the current at the load end, a first high pass filter unit for filtering a signal detected by the ferrite sensor unit, and a signal filtered by the first high pass filter unit. And a second amplifier for amplifying the second amplifier, and transmitting the amplified signal to the frequency synthesizer.

The electrical wire contact flame detection device includes a current detection unit for detecting a current of the load stage and a low-pass notch filter unit for passing only a specific frequency band to the current detected by the current detection unit, the low-notch filter unit is a specific frequency band Current may be transmitted to the controller.

The electrical wire contact part flame detection device may include a second high pass filter for filtering a current detected by the current detector and a third amplifier for amplifying the current filtered by the second high pass filter, wherein the third amplification part is amplified. The current can be transmitted to the frequency synthesizer.

The electrical wire contact part spark generation detection device includes a frequency recovery part for passing a signal having a predetermined amplitude or more, wherein the frequency synthesizing part synthesizes a signal received from the second amplifier part and a current received from the third amplifier part, The synthesized signal generated as a result of the synthesis may be transmitted to the frequency recovery unit, and the frequency recovery unit may transmit only the synthesized signal having a predetermined amplitude or more to the controller.

The controller determines whether a harmful arc occurs in the load stage by using at least one of the oscillation frequency, the current of the specific frequency band, and the synthesized signal having the predetermined amplitude or more based on the phase angle zero crossing point. can do.

According to an aspect of the present invention, a voltage detector detects a voltage at a load end, a voltage modulator modulates a voltage detected by the voltage detector with a square wave, and a phase angle zero crossing detector is configured to Detecting a phase angle zero crossing point of a modulated square wave, transmitting, by the phase angle zero crossing detector, the phase angle zero crossing point to a controller, and determining whether an arc has occurred at the load end by the controller; It provides an electrical wiring contact spark generation detection method comprising a.

According to the electrical wiring contact spark generation detecting device and method of the present invention described above, it is possible to detect the spark caused by the fine arc according to the carbonization resistance which may occur when the insulator is damaged by the aging of the wire, and directly It can be installed, and even in case of using a semiconductor thyristor phase angle control unit used for a complex load and a switching mode power supply (SMPS) load of a home appliance in parallel, the range of malfunctions can be reduced, so that it is effective in fire-vulnerable areas such as conventional markets. It can help to prevent fire, can check in real time by external inspector, and can prevent malfunction by distinguishing harmful and harmless arc, and can help to check the cause of carbonization of electrical connection and establish preventive measures. It has an effect.

1 is a view showing a schematic configuration of an electrical wiring contact spark generation detection device according to an embodiment of the present invention.
FIG. 2 is a schematic circuit diagram showing an electrical wiring contact spark generation detection device installed in a wiring according to an embodiment of the present invention.
3 is a view showing a schematic flow of a method for detecting electrical wire contact spark generation according to an embodiment of the present invention.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may properly define the concept of terms in order to best describe the user's invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Throughout the specification, when a part is said to "include" a certain component, it means that it may further include other components, except to exclude other components unless otherwise stated. In addition, the “…” described in the specification. Wealth ”,“… Gi ”,“… However, terms such as “module”, “device”, and the like refer to a unit that processes at least one function or operation, which may be implemented as a combination of hardware and / or software.

Terms used in the embodiments of the present invention will be briefly described, and the embodiments will be described in detail.

The terminology used in the embodiments of the present invention was selected as widely used as possible terms in consideration of functions in the present invention, but may vary according to the intention or precedent of a person skilled in the art, the emergence of new technologies, etc. . In addition, in certain cases, there is a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the corresponding embodiments. Therefore, the terms used in the present exemplary embodiments should be defined based on the meanings of the terms and the contents throughout the present exemplary embodiments, rather than simply names of the terms.

In an embodiment of the present invention, terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

In addition, in the embodiments of the present invention, the singular forms "a", "an" and "the" include plural forms unless the context clearly indicates otherwise.

In addition, in the embodiments of the present invention, the terms "comprise" or "have" are intended to designate that there exists a feature, number, step, operation, component, part, or a combination thereof described in the specification. Or other features or numbers, steps, operations, components, parts or combinations thereof in any way should not be excluded in advance.

In addition, in an embodiment of the present invention, the module or unit performs at least one function or operation, and may be implemented in hardware or software, or in a combination of hardware and software. In addition, the plurality of modules or the units may be integrated into at least one module except for the modules or units that need to be implemented with specific hardware, and may be implemented as at least one processor.

In addition, in an embodiment of the present invention, when a part is "connected" with another part, it is not only "directly connected" but also "electrically connected" with another element in between. It also includes cases where there is.

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

1 is a view showing a schematic configuration of an electrical wiring contact spark generation detection device according to an embodiment of the present invention.

Referring to FIG. 1, the electrical wire contact part spark generation detection device 100 includes a power cut-off part 101, a communication part 102, a warning sound generator 103, a voltage detector 110, a voltage modulator 111, and a phase. Each zero crossing detector 112, the controller 120, the frequency synthesizer 130, the oscillation frequency generator 140, the first amplifier 141, the ferrite sensor 150, and the first high pass filter 151. ), A second amplifier 152, a low pass notch filter 161, a second high pass filter 162, a third amplifier 163, and a frequency recovery unit 170.

More specifically, the voltage detector 110 may detect the voltage at the load terminal in which the electrical wire contact portion spark generation detection device 100 is installed.

The voltage modulator 111 may modulate the voltage detected by the voltage detector 110 into a square wave.

The phase angle zero crossing detector 112 may detect the phase angle zero crossing point of the square wave modulated by the voltage modulator 111 and transmit the detected phase angle zero crossing point to the controller 120.

In addition, the controller 120 may determine whether an arc is generated at a load end on which the electrical wire contact flame generation device 100 is installed.

More specifically, the controller 120 may determine whether a harmful arc is generated at the load end on which the electrical wire contact part spark generation detection device 100 is installed.

In addition, the controller 120 sets a reference range of the phase angle zero crossing point received from the voltage modulator 111 in order to determine whether a harmful arc has occurred in the load terminal provided with the electrical wiring contact flame generation device 100. Can be.

That is, the controller 120 may set a phase angle zero crossing point (phase angles 0 degrees and 180 degrees) within a preset range received from the voltage modulator 111 as a reference range, wherein the controller 120 A phase angle zero crossing point having a phase angle of 0 degrees may be set as a starting point of a reference range, and the controller 120 may set a phase angle zero crossing point having a phase angle of 180 degrees as an end point of a reference range.

In addition, when the control unit 120 determines that a harmful arc has occurred in the load terminal on which the electrical wire contact part spark generation detection device 100 is installed, the power cutoff unit 101 may cut off the power of the load terminal.

Here, the power cutoff unit 101 may cut off the power of the load end by controlling the power breaker 10 connected to the load end on which the electrical wire contact part spark generation detection device 100 is installed.

When the control unit 120 determines that a harmful arc has occurred in the load terminal on which the electrical wire contact part spark generation detection device 100 is installed, the communication unit 102 may transmit the corresponding content to the preset manager terminal.

In addition, when the control unit 120 determines that a harmful arc has occurred in the load terminal on which the electrical wire contact part spark generation device 100 is installed, the display unit 120 may display the corresponding content.

Here, the display unit may be included in the electrical wire contact unit flame generation detection device 100, may be included in an external device.

The alarm sound generator 103 may generate a warning sound when the controller 120 determines that a harmful arc has occurred in the load terminal on which the electrical wire contact part spark generation detection device 100 is installed.

In addition, the oscillation frequency generator 140 may generate an oscillation frequency, the first amplifier 141 may amplify the oscillation frequency generated by the oscillation frequency generator 140, and the first amplifier 141. ) May transmit the amplified oscillation frequency to the controller 120.

Here, the degree to which the first amplifier 141 amplifies the oscillation frequency is to amplify the amplitude of the oscillation frequency, which means a preset degree of amplification, and may be set differently according to a situation.

In addition, the ferrite sensor unit 150 may detect various signals generated from the current of the load terminal in which the electrical wire contact unit flame generation device 100 is installed, and the first high pass filter unit 151 may include the ferrite sensor unit 150. The second amplifier 152 may filter the detected signal, and the second amplifier 152 may amplify the signal filtered by the first high pass filter 151, and the second amplifier 152 may synthesize the frequency of the amplified signal. It can transmit to the unit 130.

More specifically, the first high pass filter 151 filters only signals having a frequency of 5 MHz to 10 MHz by filtering signals other than signals having a frequency of 5 MHz to 10 MHz among the signals detected by the ferrite sensor unit 150. It can transmit to the 2 amplifier 152.

The second amplifier 152 may amplify an amplitude of a signal having a frequency of 5 MHz to 10 MHz passed through the first high pass filter 151 to a predetermined amplification degree, wherein the preset amplification degree is different depending on a situation. Can be set. That is, the second amplifier 152 may transmit a signal having a frequency of 5 MHz to 10 MHz passed through the first high pass filter 151 which amplifies the amplitude to a predetermined amplification degree to the frequency synthesizer 130.

In addition, the oscillation frequency generated by the oscillation frequency generator 140 may be set in response to which ferrite core is implemented by the ferrite sensor unit 150. That is, the oscillation frequency may be set corresponding to the ferrite sensor unit 150.

In addition, the current detector 160 may detect a current of the load terminal in which the electrical wire contact portion spark generation detection device 100 is installed.

In addition, the low-pass notch filter unit 161 may pass only a specific frequency band to the current detected by the current detector 160, and may transmit a current that passes only the specific frequency band to the controller 120.

Here, the specific frequency band that the low-pass notch filter unit 161 passes through may be set to 60 Hz. That is, the low pass notch filter unit 161 may transmit only the current having a 60 Hz frequency to the control unit 120 with respect to the current detected by the current detection unit 160.

In addition, the second high pass filter 162 may filter the current detected by the current detector 160, and the third amplifier 163 may amplify the current filtered by the second high pass filter 162. The third amplifier 163 may transmit the amplified current to the frequency synthesizer 130.

More specifically, the second high pass filter 162 filters only the current having a frequency of 5 MHz to 10 MHz by filtering a current except for a current having a frequency of 5 MHz to 10 MHz with respect to the current detected by the current detector 160. The three amplifiers 163 can transmit.

The third amplifier 163 may amplify the amplitude of the current having a frequency of 5 MHz to 10 MHz to a predetermined amplification degree, and the preset amplification degree may be set differently according to a situation.

In addition, the third amplifier 163 amplifies the amplitude of the current having a frequency of 5MHz to 10MHz to a predetermined degree of amplification, and then transmits the current having a frequency of 5MHz to 10MHz with the amplitude amplified to the frequency synthesizer 130. can do.

The frequency recovery unit 170 may pass a signal having a predetermined amplitude or more.

In addition, the frequency synthesizer 130 may synthesize the signal received from the second amplifier 152 and the current received from the third amplifier 163, and the frequency recovery unit 170 may combine the synthesized signal generated as a result of the synthesis. ) Can be sent.

More specifically, the frequency synthesizing unit 130 may output a signal having a frequency of 5 MHz to 10 MHz and amplification received from the third amplifier 163 by amplifying the amplitude received from the second amplifier 152 to a predetermined amplification degree. A current having a frequency of 5 MHz to 10 MHz amplified to a predetermined degree of amplification may be synthesized, and the frequency synthesizer 130 may transmit the synthesized signal generated as a result of the synthesis to the frequency recovery unit 170.

The frequency recovery unit 170 may transmit only the synthesized signal having a predetermined amplitude or more to the controller 120. Here, in the case of the preset amplitude, it may be different depending on the setting.

In addition, the control unit 120 uses the synthesized signal of the oscillation frequency, the current of a specific frequency band and a predetermined amplitude or more based on the phase angle zero crossing point, and the load end provided with the electrical wiring contact flame generation detection device 100 is installed. It is possible to determine whether harmful arcs have occurred.

More specifically, the controller 120 may set a phase angle zero crossing point having a phase angle of 0 degrees within a preset range received from the voltage modulator 111 as a start point of the reference range, and set a phase angle of 180 degrees within the preset range. The degree phase zero crossing point can be set as the end point of the reference range.

In addition, the controller 120 may check whether or not a spark wave is generated by the oscillation frequency received from the first amplifier 141.

More specifically, the various signals detected by the ferrite sensor unit 150 may generate a waveform by the oscillation frequency amplified by the first amplifier 141, the control unit 120 is a first amplifier 141 The waveform generated by the amplified oscillation frequency can be confirmed, and when it is confirmed that a waveform similar to the flame waveform appears, it can be judged as a suspicion of arc generation (first suspicion) at the load end.

Here, the control unit 120 may compare the pre-stored flame waveform and the waveform generated by the oscillation frequency amplified by the first amplifier 141, and determines the similarity of the similarity as a result of the comparison, and whether the waveform is similar to the flame waveform. In this case, the controller 120 may determine that an arc is suspected at the load stage, and the controller 120 may set the first suspect stage.

In addition, the control unit 120 may receive only a synthesized signal having a predetermined amplitude or more from the frequency recovery unit 170. In this case, the control unit 120 may determine that an arc generation is suspected at the load end, and the control unit ( 120 may be set as the second core step.

Here, in the case of the first suspect step and the second suspect step, it does not mean the order, but simply defined, it is irrelevant to the order.

The controller 120 may convert the current of a specific frequency band received from the low pass notch filter into A / D conversion. Here, the current in a specific frequency band may mean a current having a frequency of 60 Hz.

In addition, the controller 120 may determine that a harmful arc has occurred in the load stage when the amplitude value of the specific frequency band current is constantly output for a predetermined range as a result of A / D conversion.

More specifically, when the control unit 120 is set to at least one of the first and second core step suspected of having an arc in the load stage, the control unit 120 A / D converted, as a result of the specific frequency band current When the amplitude value is constantly output during the preset range, it may be determined that a harmful arc has occurred in the load stage.

That is, for example, as a result of the A / D conversion, the control unit 120 does not change the amplitude value of the specific frequency band current like 1,2,3,2,1,2,3, but 1,2,3. When the output is constant for a predetermined range such as, 3,3,3,2,1, it may be determined that a harmful arc has occurred in the load stage.

As such, the control unit 120 converts the current of a specific frequency band received from the low-pass notch filter and checks the amplitude value, thereby preventing the power cut-off unit 101 from operating even when a harmless arc occurs. It has an effect.

That is, in general, when the power of a device such as a fluorescent lamp is turned on, an arc is generated. In order to prevent the occurrence of such a harmless arc as a case where a harmful arc has occurred, the controller 120 as described above is A / D converting the current of the specific frequency band received from the low-pass notch filter, it can be determined that the harmful arc occurs in the load stage only when the amplitude value of the specific frequency band current is constantly output for a predetermined range.

In addition, when an arc is generated by a semiconductor thyristors or an arc is generated by various electronic devices, it is often out of the range of a frequency of 5 MHz to 10 MHz, and a harmful arc is generated if a waveform similar to a flame waveform is not generated. Since it cannot be seen as an occurrence, there is an effect that can prevent the occurrence of a malfunction of the spark generation detection device.

FIG. 2 is a schematic circuit diagram showing a state in which an electrical wiring contact spark generation detection device is installed in a wiring according to an embodiment of the present invention.

Referring to FIG. 2, the electrical wire contact flame generating device 100 may operate in the same manner as described with reference to FIG. 1, and the power cutoff unit 101 controls the power breaker 10 so that the control unit 120 may be negatively connected. If it is determined that a harmful arc has occurred at the bottom, it can be confirmed that the power of the load stage can be cut off.

In addition, when the controller 120 determines that a harmful arc has occurred at the load end, the control unit 120 may control the LED 104 to be turned on.

3 is a view showing a schematic flow of a method for detecting electrical wire contact spark generation according to an embodiment of the present invention.

Referring to FIG. 3, the voltage detector 110 may detect a voltage of a load terminal in which the electrical wire contact portion spark generation detection device 100 is installed.

The voltage modulator 111 may modulate the voltage detected by the voltage detector 110 into a square wave (S331).

In addition, the phase angle zero crossing detection unit 112 may detect the phase angle zero crossing point of the square wave modulated by the voltage modulator 111 (S332).

The phase angle zero crossing detection unit 112 may transmit the detected phase angle zero crossing point to the control unit 120 (S333).

In addition, the controller 120 may determine whether an arc has occurred in the load terminal on which the electrical wire contact part spark generation detection device 100 is installed.

As described above, the configuration and operation of the electrical wire contact part spark generation detection device and method according to the embodiment of the present invention can be made. Meanwhile, in the description of the present invention, specific embodiments have been described, but various modifications are included in the scope of the present invention. It can be carried out without departing.

Although the present invention has been described with reference to the limited embodiments and the drawings, the present invention is not limited thereto, and various modifications and changes can be made by those skilled in the art to which the present invention pertains.

Those skilled in the art will appreciate that the present invention may be embodied in a modified form without departing from the essential characteristics of the above-described substrate. Therefore, the disclosed methods should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

10: power breaker 100: electrical wiring contact sparking detection device
101: power cut off unit 102: communication unit
103: warning sound generating unit 110: voltage detection unit
111: voltage modulator 112: phase angle zero crossing detector
120: control unit 130: frequency synthesis unit
140: oscillation frequency generator 141: first amplifier
150: ferrite sensor unit 151: first high-pass filter unit
152: second amplifier 160: current detector
161: low pass notch filter 162: second high pass filter
163: third amplifier 170: frequency recovery unit

Claims (11)

Frequency synthesizer;
A controller for determining whether an arc occurs at the load end;
A voltage detector detecting the voltage at the load end;
A voltage modulator for modulating the voltage detected by the voltage detector into a square wave;
A phase angle zero crossing detector for detecting a phase angle zero crossing point of the square wave modulated by the voltage modulator and transmitting the detected phase angle zero crossing point to the controller;
An oscillation frequency generator for generating an oscillation frequency;
A first amplifier configured to amplify the oscillation frequency generated by the oscillation frequency generator;
A ferrite sensor unit detecting a signal generated from the current at the load end;
A first high pass filter filtering the signal detected by the ferrite sensor;
A second amplifier configured to amplify the signal filtered by the first high pass filter;
A current detector for detecting a current at the load stage; and
A low pass notch filter for passing only a specific frequency band to the current detected by the current detector;
Including,
The first amplifier section
Transmitting the amplified oscillation frequency to the controller,
The second amplifier part
Transmitting the amplified signal to the frequency synthesizer;
The low pass notch filter part
The electrical wiring contact flame generation detection device characterized by transmitting a current of a specific frequency band to the control unit. The method of claim 1,
A power cut-off unit which cuts off power of the load stage when the controller determines that a harmful arc has occurred in the load stage;
Electrical wiring contact flame generation detection device comprising a. The method of claim 1,
A communication unit for transmitting the contents to a preset manager terminal when the controller determines that a harmful arc has occurred in the load terminal;
Electrical wiring contact flame generation detection device comprising a. The method of claim 1,
A warning sound generator for generating a warning sound when the controller determines that a harmful arc has occurred in the load end;
Electrical wiring contact flame generation detection device comprising a. delete delete delete The method of claim 1,
A second high pass filter filtering the current detected by the current detecting unit; and
A third amplifier for amplifying the current filtered by the second high pass filter;
Including,
The third amplifier section
An electrical wiring contact flame generation detection device, characterized in that the amplified current is transmitted to the frequency combining section. The method of claim 8,
A frequency recovery unit for passing a signal having a predetermined amplitude or more;
Including,
The frequency synthesizer
Synthesizing the signal received from the second amplifier and the current received from the third amplifier, and transmitting the synthesized signal generated as a result of the synthesis to the frequency recovery unit,
The frequency recovery unit
And only the synthesized signal having a predetermined amplitude or more is transmitted to the controller. The method of claim 9,
The control unit
On the basis of the phase angle zero crossing point, using the at least one of the oscillation frequency, the current of the specific frequency band and the synthesized signal of the predetermined amplitude or more, it is determined whether the harmful arc occurs in the load stage. Electrical wiring contact part spark generation detection apparatus. Detecting, by the voltage detector, a voltage at the load end;
Modulating a voltage detected by the voltage detector by a voltage modulator by a square wave;
Detecting, by a phase angle zero crossing detector, a phase angle zero crossing point of a square wave modulated by the voltage modulator;
Transmitting, by the phase angle zero crossing detector, the phase angle zero crossing point to a controller;
Determining, by the controller, whether an arc has occurred in the load end;
The step of detecting the voltage of the load terminal by the voltage detector
Generating an oscillation frequency by an oscillation frequency generator;
Amplifying the oscillation frequency generated by the oscillation frequency generator by a first amplifier;
Detecting a signal generated from a current of the load stage by a ferrite sensor unit;
Filtering a signal detected by the ferrite sensor unit by a first high pass filter;
A second amplifier amplifying the signal filtered by the first high pass filter;
Detecting a current at the load stage by a current detector; and
A low-pass notch filter passing only a specific frequency band with respect to the current detected by the current detector;
Including,
Amplifying the oscillation frequency generated by the oscillation frequency generator by the first amplifier
Transmitting the oscillation frequency amplified by the first amplifier to the controller;
Including,
Amplifying the signal filtered by the first high pass filter by the second amplifier
Transmitting a signal amplified by the second amplifier to a frequency synthesizer;
Including;
Wherein the low-pass notch filter passes only a specific frequency band for the current detected by the current detector
Transmitting, by the low-pass notch filter unit, a current of a specific frequency band to the controller;
Electrical wiring contact spark generation detection method comprising a.

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