KR102525869B1 - Optoelectronic sensor with a function to simultaneously detect fire and discharging arc occurring in the switchboard and to find the occuring location and control device thereof - Google Patents

Abstract

The present invention includes a lens that moves in an axial direction and projects a plurality of areas including objects to be monitored inside a switchboard onto the entire surface of a light receiving element module; a light-receiving element module composed of a plurality of light-receiving element pixels composed of an ultraviolet sensor for detecting only the ultraviolet band in the optical signal generated by the discharge arc projected from the lens, and an infrared sensor for detecting only the infrared component in the optical signal generated when a fire occurs; Disclosed is an optoelectronic sensor having a function of simultaneously detecting a fire and a discharge arc occurring in a switchboard composed of and finding the location of occurrence. The present invention also includes an interface circuit for inputting an accident detection signal transmitted from an optoelectronic sensor to a microprocessor; and receiving an accident detection signal from the interface circuit, storing and managing a state matched to a plurality of light-receiving element modules and a monitoring area inside a switchboard divided into a plurality of zones, and detecting discharge arcs and fires generated in a specific area inside the switchboard. However, a microprocessor that determines whether a discharge arc is generated by receiving ultraviolet rays from the ultraviolet sensor configured in the light receiving element module and determines whether a fire occurs by receiving infrared rays from the infrared sensor; Disclosed is an optoelectronic sensor control device having a function of simultaneously detecting an arc and finding a location of occurrence.

Description

Optoelectronic sensor with a function to simultaneously detect fire and discharging arc occurring in the switchboard and to find the occurrence location and a control device thereof control device

The present invention relates to an optoelectronic sensor having a function of simultaneously detecting a fire and a discharge arc occurring in a switchboard and finding a location of occurrence, and a control device thereof.

More specifically, the present invention relates to a switchboard abnormality detection and control device for detecting and controlling a discharge arc caused by deterioration or destruction of insulation due to foreign substances such as dust and moisture accumulated inside a switchboard and a fire caused therefrom. Therefore, when foreign substances such as dust are combined with moisture on the surface of busbars, wires, insulators, etc. inside the switchgear, the insulation voltage is lowered, and the discharge light and fire caused by the discharge arc generated along the surface of the insulator are detected and detected. Depending on the result, a power cutoff signal is transmitted to prevent damage to power equipment due to a fire in the switchboard, as well as to specify the area (location) where the accident occurred.

In general, an insulator is used inside a switchgear to maintain electrical insulation between current-carrying wires and busbars and supporting steel structures.

However, the insulator for maintaining electrical insulation is exposed to the air for a long period of time and is deposited by combining moisture and dust contained in the air, and dielectric breakdown occurs in the accumulated deposition layer.

The decrease in withstand voltage due to poor insulation of the insulator initially causes partial discharge on the surface of the insulator, and after a certain time elapses, leads to arc discharge and fire, which leads to damage to electrical equipment and power supply interruption.

Since the arc discharge light on the surface of the insulator is instantaneously and intermittently generated, it is difficult to specify the location at the beginning. In addition, since the occurrence of fire in a local area inside the switchboard is initially minor, it is difficult to specify the location of the fire in a remote central monitoring station.

In order to solve such a problem, it is necessary to develop more advanced technology that can accurately determine the risk and location of an accident in an early stage by monitoring the occurrence of arc discharge light inside the switchgear and the location of fire.

In the prior art developed from this point of view, in order to detect the occurrence of arc discharge light, a vacuum tube type ultraviolet sensor that detects only the ultraviolet component generated from arc discharge light is used to minimize the influence of surrounding visible light or to detect fire. For this, there is a method of using an infrared sensor that detects only infrared components.

However, the infrared detection method has a problem in that it is difficult to distinguish between an arc discharge light accident and a fire accident, and the ultraviolet detection method has a problem in that it is difficult to specify the occurrence location because the arc discharge light is instantaneous and intermittent.

Therefore, it is necessary to develop another monitoring device capable of specifying the location of the arc discharge light generated due to insulation deterioration of the insulator in the switchboard and distinguishing the arc discharge light from the fire accident.

1. Patent Registration No. 10-1559725 (2015. 10. 06. Registration, name: switchgear diagnosis device) 2. Patent registration No. 10-2224838 (2021. 03. 02, registration, name: Apparatus and method for evaluating insulation integrity of switchgear system by applying fuzzy reasoning) 3. Patent No. 10-1575228 (2015. 12. 01, registration, name: Ultraviolet arc deterioration monitoring diagnosis system of switchboard)

The present invention has been made to improve the problems inherent in the prior art as described above, and an object of the present invention is to reduce the ultraviolet rays included in the discharge arc generated when the insulation of the electrical equipment inside the switchboard is broken, and It is an object of the present invention to provide an optoelectronic sensor having a function of simultaneously detecting a fire and a discharge arc occurring in a switchboard and detecting a location of occurrence, which can simultaneously detect infrared rays from a fire.

Another object of the present invention is to provide an optoelectronic sensor having a function of simultaneously detecting a fire and a discharge arc occurring in a switchboard and finding the location of occurrence, in which a light receiving element module and a plurality of areas to be monitored inside the switchboard are matched with each other.

Another object of the present invention is to have a function of simultaneously detecting a fire and a discharge arc occurring in the switchgear and finding the location of the occurrence so that the inside of the switchgear can be projected onto the light receiving element module through a lens using the diffraction phenomenon of light. An optoelectronic sensor is provided.

Another object of the present invention is to provide an optoelectronic sensor control device having a function of simultaneously detecting a fire and a discharge arc occurring in a switchboard and finding the location of the occurrence.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

An optoelectronic sensor having a function of simultaneously detecting a fire and a discharge arc occurring in the switchgear of the present invention and finding the location of occurrence of the fire and discharge arc of the present invention for achieving the above object is

A lens that moves in the axial direction and projects a plurality of zones including objects to be monitored inside the switchboard onto the entire surface of the light receiving element module;

A light-receiving element module composed of a plurality of light-receiving element pixels including an ultraviolet sensor for detecting only the ultraviolet band in the optical signal generated by the discharge arc projected from the lens and an infrared sensor for detecting only the infrared component in the optical signal generated when a fire occurs; It is characterized by consisting of.

In the present invention, the light receiving element module

It is characterized in that N horizontal and N vertical light receiving element pixels are arranged in a lattice form or N horizontal and M light receiving element pixels are arranged in a lattice form.

In the present invention, a plurality of light receiving element pixels

Two UV sensors detecting only the ultraviolet band in the optical signal generated by the discharge arc, and two infrared sensors detecting only the infrared component in the optical signal generated in the event of a fire are arranged in a 2x2 lattice form, or one UV sensor and an infrared sensor It is characterized in that one is arranged in the form of a 1x1 grid.

In the present invention, a plurality of light receiving element pixels configured in the light receiving element module

It is characterized in that it is configured to correspond 1:1 with a plurality of divided zones for detecting accidents inside the switchgear.

An optoelectronic sensor control device having a function of simultaneously detecting a fire and a discharge arc occurring in the switchboard of the present invention to achieve the above object and finding the location of occurrence is

A pinhole lens that moves in the axial direction and projects a plurality of zones including objects to be monitored inside the switchboard onto the entire surface of the light receiving element module;

A light-receiving element module composed of a plurality of light-receiving element pixels composed of an ultraviolet sensor for detecting only the ultraviolet band in the light signal generated by the discharge arc and an infrared sensor for detecting only the infrared component in the light signal generated when a fire occurs; an optoelectronic sensor composed of;

an interface circuit for inputting the accident detection signal transmitted from the optoelectronic sensor to a microprocessor; and

Receives an accident detection signal from the interface circuit, determines a plurality of light receiving element modules and a discharge arc and a fire occurring in a specific area inside the switchboard divided into a plurality of zones, and detects ultraviolet rays from the ultraviolet sensor configured in the light receiving element module. and a microprocessor for receiving and determining whether a discharge arc has occurred and receiving infrared rays from an infrared sensor to determine whether a fire has occurred.

In the present invention, the microprocessor

A plurality of light receiving element pixels configured in the light receiving element module are programmed to correspond 1:1 with a plurality of divided zones for monitoring accidents inside the switchboard, and the accident detection signal input from the light receiving element pixel is analyzed to specify the accident occurrence zone. It is characterized by doing.

According to the optoelectronic sensor and its control device having a function of simultaneously detecting a fire and a discharge arc occurring within a switchgear and finding the location of an accident of the present invention, the ultraviolet rays included in the discharge arc generated during insulation breakdown of electrical devices inside the switchgear are detected. It is possible to determine the degree of insulation breakdown by detecting it, and at the same time, there is an effect of determining whether a fire has occurred by detecting infrared rays.

In addition, it is possible to specify a zone where a discharge arc occurs and a zone where a fire occurs due to insulation breakdown of electric devices inside the switchboard by making a 1:1 correspondence between the light receiving element module and a plurality of zones to be monitored inside the switchboard.

In addition, it is possible to implement an economical optical system by avoiding the use of expensive ultraviolet lenses and projecting the inside of the switchgear to the light receiving element module through the pinhole lens using the diffraction phenomenon of light so that discharge arcs and fires can be detected at the same time.

Other effects will become apparent to those skilled in the art from the description below.

1 is a conceptual view of the operation of a photoelectric sensor that detects an accident location by projecting the inside of a switchboard to a light receiving element module through a pinhole lens according to an embodiment of the present invention.
2 is a configuration diagram of a light receiving element module for simultaneously detecting a fire and a discharge arc according to an embodiment of the present invention;
2a is a configuration diagram of a light receiving element module having an NxN lattice form;
2B is a configuration diagram of a light-receiving element module having an NxM lattice form;
3 is a block diagram of a light receiving element pixel of a light quenching element module for simultaneously detecting a fire and a discharge arc according to an embodiment of the present invention;
3A is a configuration diagram of a light receiving element pixel having an NxN form;
2B is a configuration diagram of a light-receiving element pixel having an NxM form;
4 is a control block diagram of a switchgear control device using an optoelectronic sensor according to an embodiment of the present invention.
5 is a view showing a system in which ultraviolet and infrared signals processed according to an embodiment of the present invention are generated in unit cells.
6 is a schematic diagram in which ultraviolet and infrared signals processed from the unit cell shown in FIG. 5 are processed in a microprocessor and transmitted to the outside;

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

In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings.

In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiment of the present invention, the detailed description will be omitted.

Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

1 is a schematic diagram of an operation of an optoelectronic sensor for specifying an area where an accident occurs by projecting the inside of a switchboard to a light receiving element module through a pinhole lens according to an embodiment of the present invention. FIG. 2 is a configuration diagram of a light receiving element module for simultaneously detecting a fire and a discharge arc according to an embodiment of the present invention. FIG. 2A is a configuration diagram of a light receiving element module having an NxN grid shape, and FIG. It is a configuration diagram of a device module. 3 is a configuration diagram of a light receiving element pixel of a light receiving element module for simultaneously detecting a fire and a discharge arc according to an embodiment of the present invention. It is a configuration diagram of a light receiving element pixel having 4 is a control block diagram of a switchgear control device using an optoelectronic sensor according to an embodiment of the present invention. 5 is a diagram showing a system in which a processed ultraviolet signal and an infrared signal are generated in unit cells according to an embodiment of the present invention. FIG. 6 is a schematic diagram in which ultraviolet and infrared signals processed from the unit cell shown in FIG. 5 are processed in a microprocessor and transmitted to the outside.

As shown in FIG. 1, the photoelectric sensor 2 as an accident detection sensor for simultaneously detecting a discharge arc and a fire according to an embodiment of the present invention is composed of a pinhole lens 3 and a light receiving element module 4. It can be.

The pinhole lens (3) projects the inside of the switchgear board (1) in which objects to be monitored, such as wires, busbars, insulators, metal supports, etc. It can be.

Accordingly, infrared and ultraviolet components can be absorbed without loss and transmitted to the light receiving element module 4 without using an optical system composed of expensive lenses.

The pinhole lens 3 is configured to be movable in the axial direction, and accordingly, it can be adjusted so that the inside of the switchgear to be monitored is projected onto the entire surface of the light receiving element module 4 without missing.

The light-receiving element module 4 is configured so that a specific area inside the switchboard is matched 1:1 with a specific light-receiving element pixel 5 of the light-receiving element module 4, and accordingly, an area where an accident occurs can be specified.

The specific area inside the switchgear means, for example, an area where an accident has occurred among areas divided into a plurality of areas including wires or busbars, insulators, metal supports, etc. where discharge arcs and sparks may occur.

As shown in FIGS. 2A and 2B , the light receiving element module 4 may be composed of a plurality of light receiving element pixels 5 composed of a plurality of ultraviolet sensors 6 and a plurality of infrared sensors 7. .

The ultraviolet sensor 6 uses a GaN semiconductor and can detect a wavelength band of about 240 to 370 nm corresponding to a UVA band and a UVB band among ultraviolet rays generated by a discharge arc.

The infrared sensor 7 uses a silicon semiconductor and can detect a wavelength band of about 770 to 1000 nm among infrared rays generated when a fire occurs.

The light-receiving element module 6 has N horizontally and vertically N light-receiving element pixels 5 arranged in a lattice form as shown in FIG. 2A, or N light-receiving element pixels 5 vertically as shown in FIG. (5) may be arranged in a lattice form.

The method of lattice-arranging N horizontal and N vertical or N horizontal and M vertical light-receiving element pixels 5 in the light-receiving element module 4 depends on how to classify a plurality of zones including objects to be monitored inside the switchboard. Applied appropriately.

That is, if a total of 16 zones are divided into four horizontal zones and four vertical zones, including wires or busbars, insulators, metal supports, etc., where discharge arcs and fires may occur, the light receiving element module 4 as shown in FIG. is arranged, and divided into 12 zones by configuring 4 horizontally and 3 vertically, the light-receiving element module 4 may be disposed as shown in FIG. 2B.

Such an arrangement may be changed according to the arrangement of the subject to be monitored inside the switchgear so that it can most effectively receive the infrared rays and ultraviolet rays generated from the subject to be monitored inside the switchgear.

On the other hand, in FIGS. 2A and 2B, a plurality of light receiving element pixels 5 composed of a set of two ultraviolet sensors 6 and two infrared sensors 7 are placed in one of the plurality of zones for monitoring the inside of the switchboard It can also be set to perform a monitoring function for In this case, the number of regions in FIG. 2A may be less than 16 regions, and the number of regions in FIG. 2B may be less than 12 regions.

When configured as shown in FIG. 2, infrared rays and ultraviolet rays generated in a specific area among a plurality of areas including the wire or bus bar, insulator, metal support, etc. pass through the pinhole lens 3 to the plurality of light receiving element pixels 5 Among them, it is input to a specific light receiving element pixel matched with the specific zone, and as the corresponding signal is input to the microprocessor through the interface and processed, it is possible to determine which zone inside the switchgear has an accident such as a discharge arc or a fire.

As shown in FIG. 3, the light receiving element pixel 5 may be composed of a UV sensor 6 and an infrared sensor 7, and as shown in FIG. 3A, two UV sensors 6 and an infrared sensor (7) Two of them are arranged in a 2x2 lattice form, or as shown in FIG. 3B, one ultraviolet sensor (6) and one infrared sensor (7) are arranged in a 1x1 lattice form, and these ultraviolet sensors (6) and infrared The sensor 7 may be placed as close as possible to accurately match the inner zone of the switchgear.

Such an arrangement may be changed according to the arrangement of the subject to be monitored inside the switchgear so that it can most effectively receive the infrared rays and ultraviolet rays generated from the subject to be monitored inside the switchgear.

As shown in FIG. 4, the switchgear control device 10 using the photoelectric sensor of the present invention includes a pinhole lens 3, a light receiving element module 4, an interface circuit 8, and a microprocessor 9 It can be configured to include.

Although not shown, an alarm unit and a display unit capable of outputting an alarm sound or a warning ment notifying an accident in a switchgear to the outside under the control of the microprocessor 9 that processes and analyzes the accident detection signal transmitted from the photoelectric sensor 2 It may be configured to receive a control signal of the processor 9.

The microprocessor 9 stores and manages the plurality of light-receiving element modules 5 shown in FIG. 2 and the state matched to the monitoring area inside the switchboard divided into a plurality of areas, and discharges arcs generated in a specific area inside the switchboard. And it is programmed to determine the occurrence of fire.

The microprocessor 9 also receives ultraviolet rays from the ultraviolet sensor 6 configured in the light receiving element module 5 to determine whether a discharge arc is generated or not, and receives infrared rays from the infrared sensor 7 to determine whether a fire has occurred. judge

Since the specific light receiving element pixel 5 of the light receiving element module 4 and the specific area inside the switchboard correspond 1:1 to each other, the microprocessor 9 receives input from the light receiving element pixel 5 through the interface circuit 8. The accident detection signal is analyzed and the area where the accident occurred is specified.

As shown in FIG. 5, the system in which the processed ultraviolet signal according to the present invention is generated includes a buffer 11, a low pass signal pass filter 12, an amplifier 13, a variable attenuator 14, and a comparator 15 It can be configured to include.

The buffer 11 temporarily stores the UV detection signal detected by the UV sensor 6.

The low-pass signal pass filter 12 passes a low-limit low-pass signal that can be classified as an accident among signals included in the detected discharge arc.

The amplifier 13 amplifies the low-pass signal classified as the accident into a signal of a predetermined level.

The variable attenuator 14 changes the amount of attenuation of the signal passing through the amplifier 13.

The comparator 15 detects the pulse duration of the lower end of the detection signal and generates a square wave having a corresponding pulse width.

In addition, as shown in FIG. 5, the system in which the processed infrared signal according to the present invention is generated includes a buffer 21, a low pass signal pass filter 22, an amplifier 23, a variable attenuator 24, and a comparator ( 25).

The buffer 21 temporarily stores the infrared detection signal detected by the infrared sensor 7 .

The low-pass signal pass filter 22 passes a low-limit low-pass signal that can be classified as an accident among signals included in the detected flame.

The amplifier 23 amplifies the low-pass signal classified as the accident into a signal of a predetermined level.

The variable attenuator 24 changes the amount of attenuation of the signal passing through the amplifier 23.

The comparator 25 detects the pulse duration of the lower end of the detection signal and generates a square wave having a corresponding pulse width.

On the other hand, in FIG. 5, the constant voltage generator 30 processes the ultraviolet detection signal and the infrared detection signal detected by the ultraviolet sensor 6 and the infrared sensor 7 to generate a processed ultraviolet signal and an infrared signal in a stable system. Supply DC voltage for operation.

As shown in FIG. 6, the system in which the ultraviolet signal and infrared signal processed from the unit cell shown in FIG. 5 are processed by the microprocessor and transmitted to the outside, such as a remote control center, unit cell 100 and buffer 110 ) 210, a microprocessor 9, and a communication interface 300.

The unit cell 100 is the same as that shown in FIG. 5, and includes the configuration of the ultraviolet sensor and the infrared sensor described with reference to FIGS. 2 and 3.

The buffers 110 and 210 serve as an interface so that the input circuit of the microprocessor 9 can be matched with the received ultraviolet signal and infrared signal.

As described with reference to FIG. 4 , the microprocessor 9 can determine the occurrence of a discharge arc and a fire occurring in a specific area inside the switchboard while storing and managing states matched to each other in the monitoring area inside the switchboard divided into a plurality of areas. It is programmed to receive ultraviolet rays from the ultraviolet sensor 6 configured in the light receiving element module 5 to determine whether a discharge arc has occurred in a specific area, and to receive infrared rays from the infrared sensor 7 to determine whether a discharge arc has occurred in a specific area. Determine whether a fire has occurred.

The communication interface 300 is a component responsible for transmitting the result processed by the microprocessor 9 to an external device, for example, a remote control center, etc. so that it can be displayed externally. The remote control center may generate an alarm sound or display a warning message according to the processing result of the microprocessor 9. In addition, an emergency signal can be transmitted to the manager's terminal so that the manager can take direct action at the site of the switchgear where it is determined that an accident has occurred.

As described above, the detailed description of the present invention has been described with respect to the preferred embodiments of the present invention, but this is the best embodiment of the present invention exemplarily described, but does not limit the present invention. In addition, it is of course possible for anyone having ordinary knowledge in the technical field to which the present invention belongs to various modifications and imitations without departing from the scope of the technical idea of the present invention.

Therefore, the scope of the present invention is not limited to the above-described embodiments, but may be implemented in various forms of embodiments within the scope of the appended claims. And without departing from the subject matter of the present invention claimed in the claims, anyone with ordinary knowledge in the art to which the invention pertains is considered to be within the scope of the claims of the present invention to various extents that can be modified.

An embodiment for realizing a photoelectric sensor having a function of simultaneously detecting a fire and a discharge arc occurring in a switchboard and finding a location of occurrence and a control device thereof has been described. The embodiments described above are illustrative of some of the many specific embodiments that demonstrate the principles described herein. Therefore, by using the embodiments of the present invention, those skilled in the art will be able to easily implement many other arrangements within the scope defined by the claims of the present invention.

1: Target for monitoring accidents inside switchgear 2: Photoelectric sensor
3: pinhole lens 4: light receiving element module
5: light receiving element pixel 6: ultraviolet sensor
7: infrared sensor 8: interface circuit
9; Microprocessor 10: switchgear control device
11, 21; Buffers 12, 22: LPF
13, 23: amplifier 14, 24: variable attenuator
15, 25: comparator 30: constant voltage generator
100; unit cell 300 ; communication interface

Claims (6)

A lens disposed at the front end of the light-receiving element module to project the light signal due to the discharge arc and the fire signal generated in the plurality of areas including the monitoring target inside the switchboard to the entire surface of the light-receiving element module by using the diffraction phenomenon of light. ; and
A light-receiving element module composed of a plurality of light-receiving element pixels including an ultraviolet sensor for detecting only the ultraviolet band in the optical signal generated by the discharge arc projected from the lens and an infrared sensor for detecting only the infrared component in the optical signal generated when a fire occurs; made up of,
The light-receiving element module has N horizontally and vertically N light-receiving elements arranged in a lattice form or N horizontally and M vertical light-receiving elements arranged in a lattice form,
In the plurality of light-receiving element pixels, two ultraviolet sensors detecting only the ultraviolet band in the optical signal generated by the discharge arc and two infrared sensors detecting only the infrared component in the optical signal generated when a fire occurs are alternately arranged in a 2x2 grid form, or Alternatively, one ultraviolet sensor and one infrared sensor are arranged in a 1x1 lattice form, and a specific area inside the switchboard is configured to be matched 1: 1 with a specific light receiving element pixel so that the area where the accident occurs is specified. An optoelectronic sensor with the function of simultaneously detecting fire and discharge arc and finding the location of occurrence.
delete delete delete A lens disposed at the front end of the light-receiving element module to project the light signal due to the discharge arc and the fire signal generated in the plurality of areas including the monitoring target inside the switchboard to the entire surface of the light-receiving element module by using the diffraction phenomenon of light. ;
A light-receiving element module composed of a plurality of light-receiving element pixels composed of an ultraviolet sensor for detecting only the ultraviolet band in the optical signal generated by the discharge arc and an infrared sensor for detecting only the infrared component in the optical signal generated when a fire occurs; an optoelectronic sensor composed of ;
The light-receiving element module has N horizontally and vertically N light-receiving elements arranged in a lattice form or N horizontally and M vertical light-receiving elements arranged in a lattice form,
In the plurality of light-receiving element pixels, two ultraviolet sensors detecting only the ultraviolet band in the optical signal generated by the discharge arc and two infrared sensors detecting only the infrared component in the optical signal generated when a fire occurs are alternately arranged in a 2x2 grid form, or Or, one ultraviolet sensor and one infrared sensor are arranged in a 1x1 grid form, and configured to correspond 1:1 to a plurality of zones divided for detecting accidents inside the switchgear;
an interface circuit for inputting the accident detection signal transmitted from the optoelectronic sensor to a microprocessor;
The microprocessor is programmed so that a plurality of light-receiving element pixels configured in the light-receiving element module correspond 1:1 to a plurality of zones divided for detecting an accident inside the switchboard, and analyzes the fault detection signal input from the light-receiving element pixel specifying the area where the accident occurred; and
Receives an accident detection signal from the interface circuit, determines a plurality of light receiving element modules and a discharge arc and a fire occurring in a specific area inside the switchboard divided into a plurality of zones, and detects ultraviolet rays from the ultraviolet sensor configured in the light receiving element module. A microprocessor that receives and determines whether a discharge arc occurs and receives infrared rays from an infrared sensor to determine whether a fire occurs; Optoelectronic sensor control device having a function. delete

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