KR102114211B1 - Apparatus for assisting opening/closing of circuit breaker - Google Patents

Abstract

The present invention relates to a circuit breaker opening / closing auxiliary device that identifies a temperature of a circuit breaker based on a thermal image of a circuit breaker in which a failure occurs, and assists the opening and closing operation of the circuit breaker based on the identified temperature. A circuit breaker opening and closing auxiliary device according to an embodiment of the present invention is a device for assisting the opening and closing of a circuit breaker equipped with a plurality of temperature sensors, the first temperature and the plurality of temperature sensors detected by a thermal image of the circuit breaker Compensation unit for compensating for the temperature value of the thermal image using the second temperature provided from, and identifies the normal operating state of the circuit breaker based on the temperature value detected in the compensated thermal image, the identified normal operation And a control unit that compares a state with the current operating state of the circuit breaker to diagnose whether the circuit breaker has failed, and a control unit that generates a control signal according to the failure of the circuit breaker and provides the generated control signal to the circuit breaker. It is characterized by.

Description

Breaker opening / closing auxiliary device {APPARATUS FOR ASSISTING OPENING / CLOSING OF CIRCUIT BREAKER}

The present invention relates to a circuit breaker opening / closing auxiliary device that identifies a temperature of a circuit breaker based on a thermal image of a circuit breaker in which a failure occurs, and assists the opening and closing operation of the circuit breaker based on the identified temperature.

A circuit breaker (CB) is connected between a system that supplies power and a load that is supplied with power from the system, and detects it when an overcurrent flows to the load to cut off the power supply to the load.

The circuit breaker includes a relay that selectively opens and closes a circuit, and includes, for example, OCR (Over Current Relay) driven by a mechanical contact, and EOCR (Electronic Over Current Relay) driven by a semiconductor contactless method.

The circuit breaker selectively opens and closes the circuit by providing a control signal to the internal relay according to the amount of current flowing in the load.

At this time, when a control signal is not provided to the relay in a specific control cycle or an incorrectly generated control signal is provided to the relay, an open / closed state of the relay is controlled in reverse, so that an overcurrent flows to the load or power supplied to the load is cut off. There is this.

Although overcurrent and instantaneous power interruption may adversely affect the load and other systems connected to the load, there is a problem in that the user trusts the operating state of the breaker and interprets the state of the load and the system as opposed to the actual state.

Accordingly, there is a need for a method for protecting a load and a system by grasping whether or not the breaker is broken from the outside of the breaker and controlling the operation of the breaker when the breaker breaks down.

An object of the present invention is to provide a circuit breaker opening / closing auxiliary device capable of improving the accuracy of temperature measurement through a thermal image by compensating for a temperature value detected through a thermal image on the circuit breaker.

In addition, an object of the present invention is to provide a circuit breaker opening / closing auxiliary device capable of determining whether a circuit breaker has failed by comparing a normal opening and closing state of a circuit breaker identified through a thermal image of the circuit breaker.

In addition, the present invention provides a circuit breaker opening / closing auxiliary device capable of preventing overcurrent generation and power supply interruption due to a circuit breaker malfunction by assisting the circuit breaker opening / closing operation based on the temperature detected through the thermal image of the circuit breaker. It is aimed at.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned can be understood by the following description, and will be more clearly understood by embodiments of the present invention. In addition, it will be readily appreciated that the objects and advantages of the present invention can be realized by means of the appended claims and combinations thereof.

A circuit breaker opening and closing auxiliary device according to an embodiment of the present invention for achieving this object is a device for assisting the opening and closing of a circuit breaker equipped with a plurality of temperature sensors, the first temperature detected by the thermal image of the circuit breaker And a compensation unit for compensating for the temperature value of the thermal image using the second temperature provided from the plurality of temperature sensors, and identifies a normal operating state of the circuit breaker based on the temperature value detected in the compensated thermal image. , Compares the identified normal operating state and the current operating state of the circuit breaker to generate a control signal according to the diagnosis unit for diagnosing whether or not the circuit breaker malfunctions, and whether or not the circuit breaker malfunctions, and the generated control signal to the circuit breaker It characterized in that it comprises a control unit provided.

According to the present invention as described above, by compensating the temperature value detected through the thermal image of the circuit breaker, it is possible to improve the accuracy of the temperature measurement through the thermal image.

In addition, according to the present invention, it is possible to determine whether a breaker has failed by comparing the normal open / closed state of the breaker identified through the thermal image of the breaker with the current open / closed state.

In addition, according to the present invention, by assisting the opening and closing operation of the corresponding circuit breaker based on the temperature detected through the thermal image of the circuit breaker, it is possible to prevent overcurrent generation and power supply interruption due to the circuit breaker malfunction.

1 is a view showing a circuit breaker opening and closing auxiliary device according to an embodiment of the present invention.
FIG. 2 is a view showing a circuit breaker opening and closing auxiliary device controlling a circuit breaker connected between a system and a load according to an embodiment of the present invention.
3 is a view showing an example of the circuit breaker shown in FIG. 2;
Figure 4 is a view showing a thermal image taken by a plurality of measurement points set in the circuit breaker.
5 is a view showing a state in which the temperature reference value of the thermal image shown in FIG. 4 is adjusted according to a compensation value.
6 is a graph showing temperature values of a thermal image and control signals generated based on the temperature values, respectively.

The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, and accordingly, a person skilled in the art to which the present invention pertains can easily implement the technical spirit of the present invention. In the description of the present invention, when it is determined that detailed descriptions of known technologies related to the present invention may unnecessarily obscure the subject matter of the present invention, detailed descriptions will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

The present invention relates to a device for assisting the opening and closing of a circuit breaker connected between a system and a load, and relates to a device for assisting the opening and closing operation of a corresponding circuit breaker based on the temperature of the circuit breaker that has failed in the opening and closing operation.

A circuit breaker (CB) is connected between a system that supplies power and a load that is supplied with power from the system, and when an overcurrent flows in the load, it detects it and may serve to cut off the power supply to the load.

The circuit breaker may include a relay that selectively opens and closes a circuit, and may include, for example, an OCR (Over Current Relay) driven by a mechanical contact, an electronic over current relay (EOCR) driven by a semiconductor contactless method, and the like. have.

The breaker opening / closing auxiliary device, which will be described later, may be connected to the breaker described above to diagnose whether or not the breaker breaks down, and to assist in controlling the breaker when the breaker breaks down.

Hereinafter, a circuit breaker opening and closing auxiliary device according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6.

1 is a view showing a circuit breaker opening and closing auxiliary device according to an embodiment of the present invention, Figure 2 shows a state in which the circuit breaker opening and closing auxiliary device according to an embodiment of the present invention controls the circuit breaker connected between the system and the load It is one drawing.

3 is a diagram illustrating an example of the circuit breaker shown in FIG. 2.

FIG. 4 is a view showing a thermal image taken with a plurality of measurement points set in a circuit breaker, and FIG. 5 is a view showing a state in which a temperature reference value of the thermal image shown in FIG. 4 is adjusted according to a compensation value.

6 is a graph showing temperature values of a thermal image and control signals generated based on the temperature values, respectively.

1, the circuit breaker opening and closing auxiliary device 100 according to an embodiment of the present invention may include a compensation unit 110, the diagnostic unit 120 and the control unit 130. The circuit breaker opening and closing auxiliary device 100 shown in FIG. 1 is according to an embodiment, and its components are not limited to the embodiment shown in FIG. 1, and some components may be added, changed, or deleted as necessary Can be.

Each component constituting the circuit breaker opening / closing auxiliary device 100 may include a processor and a memory, and perform each function described below according to the operation of the processor using the memory. Alternatively, each component may perform a function described later by one main processor.

Referring to FIG. 2, the circuit breaker opening / closing auxiliary device 100 may be connected to the circuit breaker 10 provided between the system 200 and the load 300. Although the circuit breaker 10 is briefly illustrated in FIG. 2, as described above, the circuit breaker 10 may be configured in various forms to selectively open and close the circuit between the system 200 and the load 300. .

For example, the circuit breaker 10 may be an air circuit breaker (ACB) that performs a blocking operation through an extinguishing method using air as an insulating material.

3 is an example of the circuit breaker 10, and is a view showing a circuit breaker. Referring to FIG. 3, the circuit breaker 10 may have an internal circuit (not shown) for performing a blocking operation, and may be mounted in a case provided with an external interface.

The user can supply power to the circuit breaker 10 or stop the power supply through an external interface, monitor the operation state of the circuit breaker 10, or adjust the magnitude of the breaking current.

Referring back to FIG. 2, the compensation unit 110 may detect the first temperature based on the thermal image 400 of the circuit breaker 10.

The compensation unit 110 may receive a thermal image 400 from the thermal imager by performing data communication with a thermal imager (not shown) installed inside or outside the circuit breaker opening and closing auxiliary device 100.

The thermal imaging camera may include any camera that detects heat generated by the breaker 10, and may include, for example, an infrared camera.

The thermal imaging camera may be installed outside the circuit breaker 10 to detect heat generated from the outer surface of the circuit breaker 10 or may be installed inside the circuit breaker 10 to detect heat generated from the circuitry inside the circuit breaker 10. .

The position of the thermal imaging camera is not limited to this, and may be differently determined according to the position of the measurement point described later.

The thermal imaging camera may generate a thermal image 400 using heat emitted from the breaker 10. More specifically, the thermal imaging camera may generate the thermal image 400 by expressing the circuit breaker 10 in different colors according to the intensity of heat radiated from each part of the circuit breaker 10.

Referring to FIG. 4, the circuit breaker 10 expressed in the thermal image 400 may be expressed in different colors according to a reference temperature range of the thermal image 400. The reference temperature range may be set as a range between the maximum temperature reference value 410 and the minimum temperature reference value 420.

When the temperature of any one position of the breaker 10 is the maximum temperature reference value 410, the corresponding position may be expressed in white in the thermal image 400, and the temperature of the other location of the subject is the minimum temperature reference value 420 ), The corresponding location may be expressed in black in the thermal image 400.

The correction unit may receive the thermal image 400 from the thermal image camera and detect the first temperature of the circuit breaker 10 through the color expressed on the thermal image 400.

More specifically, the correction unit refers to the color of each part of the circuit breaker 10 expressed in the thermal image 400 and the color defined in the reference temperature range of the corresponding thermal image 400, so that each part of the circuit breaker 10 The first temperature can be detected.

Meanwhile, at least one measurement point may be preset in the circuit breaker 10. Here, the measurement point may mean a position to measure temperature, for example, a specific location included in the internal circuit of the circuit breaker 10, a contact location of the circuit breaker 10, a location of a bus bar, a circuit breaker ( 10) Any location of the outer case.

The compensation unit 110 may detect coordinates of a measurement point on the thermal image 400 and detect a first temperature corresponding to the detected coordinates.

Each point represented on the thermal image 400 may have coordinates according to a position where the horizontal axis X and the vertical axis Y intersect in the thermal image 400.

As illustrated in FIG. 4, a plurality of measurement points, for example, first to fourth measurement points (A1 to A4) may be preset in the circuit breaker 10, and the compensation unit 110 may display an image of the thermal image 400. It is possible to detect the coordinates of the measuring point from each point of the circuit breaker 10 expressed in.

For example, the compensation unit 110 detects coordinates of the first to fourth measurement points A1 to A4 as (X1, Y1), (X2, Y2), (X3, Y3), and (X4, Y4), respectively. can do.

The compensation unit 110 may detect a first temperature corresponding to the detected coordinates for each measurement point.

More specifically, the compensation unit 110 may determine the temperature corresponding to the (X1, Y1) coordinate by comparing the color of the (X1, Y1) coordinate with the reference temperature range, and the detected temperature is the first measurement point (A1). It can be detected by the first temperature. In this way, the compensation unit 110 can determine the temperature corresponding to each coordinate by comparing the colors of the (X2, Y2), (X3, Y3), and (X4, Y4) coordinates with the reference temperature range. The temperature can be detected as the first temperature of the second to fourth measurement points (A2 to A4).

The compensation unit 110 may compensate the temperature value of the thermal image 400 using the first temperature detected in the above manner and the second temperature provided from the plurality of temperature sensors.

The breaker 10 may be provided with a plurality of temperature sensors. The temperature sensor may be an analog temperature sensor such as a thermistor or a digital temperature sensor.

The plurality of temperature sensors may be installed at an arbitrary position of the breaker 10 to measure the second temperature, which is the temperature of the corresponding position. For example, a plurality of temperature sensors are installed in a specific location included in the internal circuit of the circuit breaker 10, a contact location of the circuit breaker 10, a bus bar location, a circuit breaker 10 return case, etc. The temperature can be measured.

On the other hand, a plurality of temperature sensors are provided at at least one measurement point described above to measure the second temperature of each measurement point.

In other words, a plurality of temperature sensors may be provided at the first to fourth measurement points A1 to A4 illustrated in FIG. 4, and the plurality of temperature sensors may include a second temperature of the first to fourth measurement points A1 to A4. Can be measured.

The compensation unit 110 may receive the second temperature of each measurement point from a plurality of temperature sensors, and compensate the temperature value of the thermal image 400 using the aforementioned first temperature and second temperature.

Since the temperature sensor is installed at each measuring point to directly measure the temperature of the measuring point, and the thermal image 400 indirectly measures the temperature of each measuring point using infrared rays, the accuracy of the temperature measurement is measured by the temperature sensor. The second temperature may be higher than the first temperature detected based on the thermal image 400.

Accordingly, the compensation unit 110 may compensate the temperature value of the thermal image 400 so that the first temperature follows the second temperature.

More specifically, the compensation unit 110 determines compensation values using the first temperature and the second temperature for a plurality of measurement points set in the circuit breaker 10, and uses the determined compensation values to determine the compensation value of the thermal image 400. Temperature values can be compensated.

Here, the compensation value may be determined as an average value of difference values between the first temperature and the second temperature.

Referring back to FIG. 4, the compensation unit 110 may identify the first temperatures of the first to fourth measurement points A1 to A4 as T1, T2, T3, and T4, respectively, using the thermal image 400. have. Further, the second temperatures of the first to fourth measurement points A1 to A4 provided from the plurality of temperature sensors may be T1 ', T2', T3 ', and T4', respectively.

At this time, the compensation value Q can be calculated by the following [Equation 1].

In other words, the compensation unit 110 may determine an average value of a value obtained by subtracting the first temperature from the second temperature with respect to the first to fourth measurement points A1 to A4.

When the compensation value is determined, the compensation unit 110 may compensate the temperature value of the thermal image 400 by adding the compensation value to the temperature reference value of the thermal image 400.

More specifically, the compensation unit 110 may reset the reference temperature range of the thermal image 400 by adding the compensation value to the maximum temperature reference value 410 and the minimum temperature reference value 420 of the thermal image 400, respectively. have.

Referring to FIG. 5, the maximum temperature reference value 410 and the minimum temperature reference value 420 before compensation of the compensation unit 110 may be 66 degrees and 58.7 degrees, respectively, and accordingly, the reference temperature range may be set to 58.7 to 66 degrees. have.

The compensation unit 110 adds the compensation value Q to the existing maximum temperature reference value 410 and the minimum temperature reference value 420, respectively, so that the maximum temperature reference value 410 is 66 + Q degrees and the minimum temperature reference value 420 is 58.7. Can be newly set to + Q degree. Accordingly, the reference temperature range may be set to 58.7 + Q to 66 + Q degrees.

As the reference temperature range of the thermal image 400 is compensated, the temperature value of the compensated thermal image 400 may be higher than the temperature value before the compensation operation.

As described above, the present invention can improve the accuracy of temperature measurement through the thermal image by compensating for the detected temperature value through the thermal image for the circuit breaker.

Referring to FIG. 2 again, the diagnosis unit 120 may identify the normal operating state of the circuit breaker 10 based on the detected temperature value (hereinafter, the detected temperature value, T _CB ) in the compensated thermal image 400. Can be.

Here, the normal operating state may refer to a normal opening / closing state of the circuit breaker 10 within a temperature condition detected from the compensated thermal image 400.

As described above, the circuit breaker 10 may block the current when it is determined that the current supplied to the load 300 exceeds the specific size and is overcurrent. At this time, the temperature of the circuit breaker 10 may increase as the current supplied to the load 300 increases.

Hereinafter, the detection temperature value T _CB at the moment when the current supplied to the load 300 becomes an overcurrent is defined as a limit temperature T _max . In addition, the state in which the circuit breaker 10 provides the power of the system 200 to the load 300 is defined as a closed state, and the state in which the power of the system 200 is blocked from being provided to the load 300 is opened. Is defined as

For example, when the circuit breaker 10 is normally operated, when the detection temperature value T _CB is less than the limit temperature T _max , the circuit breaker 10 may be controlled in a closed state. Conversely, if the detected temperature value T _CB is greater than or equal to the limit temperature T _max , the breaker 10 may be controlled to the open state.

The normal operating state of the circuit breaker 10 according to the detected temperature value T _CB may be stored in memory in advance. More specifically, the normal operating state of the circuit breaker 10 according to the temperature value detected at an arbitrary measurement point may be stored in the memory.

The diagnostic unit 120 may identify a normal operating state of the breaker 10 according to the detected temperature value T _CB by referring to the memory.

The limit temperature T _max for an arbitrary measurement point when an overcurrent flows in the load 300 may be stored in the memory in advance, and the diagnostic unit 120 sets the detection temperature value T _CB to the limit temperature T _max . Compared with can identify the normal operating state of the circuit breaker (10).

Referring to (a) of FIG. 6, the detection temperature value T _CB gradually increases from a time point t ₁ when the load 300 is driven to exceed a limit temperature T _max at a specific time point t ₂ . can do.

The diagnosis unit 120 may identify the normal operating state of the breaker 10 in the closed state from 0 to t ₂ , and may identify the normal operating state of the breaker 10 in the open state from t ₂ or more. There is.

In other words, the diagnosis unit 120 can determine whether an overcurrent has occurred in the load 300 based on the detected temperature value T _CB for any measurement point of the breaker 10, and the breaker according to whether the overcurrent has occurred The normal open / closed state of (10) can be identified.

Meanwhile, the diagnosis unit 120 may identify a normal operation state based on the change amount of the detected temperature value T _CB .

The amount of change in the detected temperature value (T _CB) may indicate the amount of change with respect to the detected temperature value (T _CB) is the unit time for any measuring point of the circuit-breaker (10).

When the current flowing through the load 300 rapidly increases, the detection temperature value T _CB may also increase rapidly. At this time, if the amount of change in the detected temperature value T _CB is greater than or equal to the preset maximum change amount, the diagnostic unit 120 may overload the load 300 even when the detected temperature value T _CB is less than the limit temperature T _max . It can be judged as flowing.

The maximum change amount of the detected temperature value T _CB for an arbitrary measurement point may be stored in advance, and the diagnostic unit 120 compares the temperature change amount and the maximum change amount of the detected temperature value T _CB with reference to the memory. Normal operating conditions can be identified.

More specifically, the diagnosis unit 120 may identify the normal operating state of the circuit breaker 10 as a closed state when the temperature change amount of the detected temperature value T _CB is less than the maximum change amount. On the other hand, when the temperature change amount of the detected temperature value T _CB exceeds the maximum change amount, the normal operating state of the breaker 10 can be identified as an open state.

The diagnosis unit 120 may diagnose whether the breaker 10 has failed by comparing the identified normal operation state with the current operation state of the breaker 10.

Here, the current operating state of the breaker 10 is the current opening of the breaker 10? It can mean a state.

The diagnosis unit 120 may be provided with the operation state information of the corresponding circuit breaker 10 from the circuit breaker 10, and may identify the current operation state of the circuit breaker 10 based on the provided operation state information.

The diagnosis unit 120 may diagnose whether the breaker 10 has failed according to whether the normal operation state matches the current operation state of the breaker 10.

As described above, since both the normal operation state and the current operation state refer to the open / closed state of the circuit breaker 10, it may be an open state or a closed state.

The diagnosis unit 120 can diagnose whether the breaker 10 has failed by comparing whether the normal open / closed state of the breaker 10 identified according to the detected temperature value T _CB is equal to the current open / closed state of the breaker 10. have.

For example, if the detection temperature value T _CB is less than the limit temperature T _max , the diagnostic unit 120 determines that no overcurrent flows through the load 300 and closes the normal operating state of the circuit breaker 10 to a closed state. I can judge. At this time, the current opening / closing state of the normally operating circuit breaker 10 may be a closed state, or the current opening / closing state of the breaker 10 having a failure may be an open state.

Conversely, if the detection temperature value T _CB is greater than or equal to the limit temperature T _max , the diagnostic unit 120 may determine that the overload flows through the load 300 to determine the normal operating state of the breaker 10 as an open state. have. At this time, the current opening / closing state of the normally operating circuit breaker 10 may be an open state, or the current opening / closing state of the breaker 10 having a failure may be a closed state.

Accordingly, the diagnosis unit 120 may diagnose the breaker 10 as a normal state when the normal operation state and the current operation state match, and diagnose the breaker 10 as a failure state when the normal operation state and the current operation state are different. have.

The above-described detection temperature value T _CB may be a temperature value detected at any point among the temperature values detected in the thermal image 400.

Alternatively, the detected temperature value T _CB may be a maximum temperature value having a maximum size among the detected temperature values in the thermal image 400.

Accordingly, the diagnosis unit 120 may identify the maximum temperature value among the temperature values detected in the thermal image 400 and identify the normal operating state of the circuit breaker 10 based on the identified maximum temperature value.

Referring back to FIG. 4, each point of the thermal image 400 may have a different temperature, and accordingly, may be expressed in different colors. At this time, the diagnostic unit 120 identifies the coordinates of the point having the maximum temperature on the thermal image 400, that is, the point represented closest to the white, and identifies the maximum temperature value corresponding to the identified coordinates. Can be.

The diagnosis unit 120 may identify the normal operating state of the circuit breaker 10 by comparing the identified maximum temperature value with the threshold temperature T _max , and determine the identified normal operating state and the current operating state of the circuit breaker 10. By comparison, it is possible to diagnose whether the breaker 10 is defective.

The method of diagnosing whether or not the breaker 10 is broken is the same as described above, so a detailed description thereof will be omitted here.

The diagnosis unit 120 may diagnose the breaker 10 as an open failure state when the normal operation state is an open state and the current operation state is a closed state. Conversely, the diagnosis unit 120 may diagnose the breaker 10 as a closed failure state when the normal operating state is a closed state and the current operating state is an open state.

Here, the open fault state may mean a state in which the circuit breaker 10 is not switched from a closed state to an open state, and the closed fault state may mean a state in which the circuit breaker 10 is not switched from an open state to a closed state.

For example, when the detection temperature value (T _CB ) exceeds the limit temperature (T _max ), the circuit breaker 10 should be controlled to an open state. If the current circuit breaker 10 is closed or closed, the diagnosis unit 120 may diagnose the breaker 10 as an open fault condition.

In addition, when the detection temperature value (T _CB ) is less than the limit temperature (T _max ), the circuit breaker 10 should be controlled in a closed state. When the opening / closing state of the current circuit breaker 10 is an open state, the diagnosis unit 120 The breaker 10 can be diagnosed as a closed fault condition.

That is, according to the present invention, it is possible to determine whether a breaker has failed by comparing the normal open / closed state of the breaker identified through the thermal image of the breaker with the current open / closed state.

Referring back to FIG. 2, the control unit 130 receives information on whether the breaker 10 has failed from the above-described diagnostic unit 120, and generates a control signal Sc according to whether the breaker 10 has failed. It can be provided to the circuit breaker (10).

The control signal Sc is a signal for controlling opening and closing of the breaker 10, and may be a digital signal or an analog pulse signal.

When the breaker 10 is diagnosed as a failure state, the controller 130 may generate a control signal Sc and provide the generated control signal Sc to the breaker 10.

In other words, when the breaker 10 is diagnosed as a normal state, the control unit 130 does not generate a control signal Sc, and can generate a control signal Sc only when the breaker 10 is diagnosed as a failure state. have.

When a control signal Sc is provided to the circuit breaker 10, the circuit breaker 10 may perform an opening / closing operation according to the control signal Sc.

The control signal Sc may include an open control signal and a closed control signal. Here, the open control signal may be a signal for controlling the current open / closed state of the circuit breaker 10 to the open state, and the closed control signal may be a signal for controlling the current open / closed state of the circuit breaker 10 to the closed state.

The control unit 130 may generate an open control signal when the breaker 10 is diagnosed as an open failure state, and generate a closed control signal when the breaker 10 is diagnosed as a closed failure state and provide it to the breaker 10.

Referring to (a) and (b) of FIG. 6, as described above, the diagnostic unit 120 may identify the normal operating state of the circuit breaker 10 in a closed state from 0 to t ₂ , and t ₂ or more. In the section, the normal operating state of the breaker 10 can be identified as an open state.

When the breaker 10 is diagnosed as a closed failure state in a section of 0 to t ₂ , the controller 130 may generate a closed control signal having a high pulse (size 1). On the other hand, when the breaker 10 is diagnosed as an open failure state in a section of t ₂ or more, the controller 130 may generate an open control signal having a low pulse (size 0).

When the control signal Sc generated as described above is provided to the circuit breaker 10, the circuit breaker 10 may be controlled in a closed state according to a high pulse, and may be controlled in an open state according to a low pulse.

As described above, according to the present invention, the opening and closing operation of the corresponding circuit breaker is assisted based on the temperature detected through the thermal image of the circuit breaker, thereby preventing overcurrent generation and power supply interruption due to the circuit breaker malfunction.

The above-described present invention, the above-described embodiments and the accompanying drawings because it is possible for a person having ordinary knowledge in the technical field to which the present invention pertains to various substitutions, modifications and changes without departing from the technical spirit of the present invention Is not limited by

Claims (11)

In the device for assisting the opening and closing of the circuit breaker equipped with a plurality of temperature sensors,
A compensation unit for compensating for the temperature value of the thermal image by using the first temperature detected by the thermal image of the breaker and the second temperature provided from the plurality of temperature sensors during the blocking operation of the breaker;
A diagnostic unit that identifies the normal operating state of the circuit breaker based on the temperature value detected in the compensated thermal image, and compares the identified normal operating state with the current operating state of the circuit breaker to diagnose whether the circuit breaker has failed. ; And
It includes a control unit for generating a control signal according to the failure of the breaker, and providing the generated control signal to the breaker,
The compensation unit determines a compensation value by using a difference value between the first temperature for a plurality of measurement points set in the circuit breaker and the second temperature measured by the plurality of temperature sensors respectively installed at the plurality of measurement points, and the Compensating the temperature value of the thermal image by using the determined compensation value
Breaker opening and closing auxiliary device.
According to claim 1,
At least one measuring point is preset in the circuit breaker,
The compensation unit detects the coordinates of the measurement point on the thermal image, the circuit breaker opening and closing auxiliary device for detecting the first temperature corresponding to the detected coordinates.
delete According to claim 1,
The compensation unit is a breaker opening and closing auxiliary device for determining the average value of the difference between the first temperature and the second temperature as the compensation value.
According to claim 1,
The compensation unit is a breaker opening and closing auxiliary device for compensating the temperature value of the thermal image by adding the determined compensation value to the temperature reference value of the thermal image.
According to claim 1,
The diagnostic unit is a circuit breaker opening and closing auxiliary device for identifying the normal operating state based on the amount of change in the temperature value detected in the compensated thermal image.
According to claim 1,
The diagnostic unit identifies the maximum temperature value among the detected temperature values in the compensated thermal image, and the circuit breaker opening and closing auxiliary device for identifying the normal operating state of the circuit breaker based on the identified maximum temperature value.
According to claim 1,
The diagnosis unit is a breaker opening and closing auxiliary device for diagnosing the circuit breaker as a normal state when the normal operation state and the current operation state match, and diagnosing the circuit breaker as a failure state when the normal operation state and the current operation state are different.
The method of claim 8,
The diagnosis unit diagnoses the breaker as an open failure state when the normal operation state is open and the current operation state is closed, and closes the breaker when the normal operation state is closed and the current operation state is open. Circuit breaker opening and closing auxiliary device to diagnose the condition.
According to claim 1,
The control unit is a breaker opening and closing auxiliary device that generates the control signal when the breaker is diagnosed as a fault, and provides the generated control signal to the breaker.
The method of claim 10,
The control unit generates an open control signal when the breaker is diagnosed as an open fault condition, and generates a closed control signal when the breaker is diagnosed as a closed fault condition, thereby providing a breaker opening and closing auxiliary device to the breaker.

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