KR101095598B1 - Deterioration diagnosis system for cable of distributing board using ir temperature sensor - Google Patents

Abstract

PURPOSE: A distribution board connection unit diagnosis system is provided to diagnose the degradation of a connection unit by detecting temperature and current of the connection unit at the same time and analyzing the temperature and the current. CONSTITUTION: A temperature sensor module(110) detects the temperature of a connection unit within a distribution board and ambient temperature. A controller(120) periodically checks normal operation through self diagnosis of the temperature sensor module and measures the temperature of the connection unit and the ambient temperature at a set time period and calculates average temperature of the connection unit and average temperature of the ambient temperature using temperature data which is measured. The controller checks whether temperature difference exceeds a temperature ceiling range which is fixed or not and generates an emergency signal or a shut-off signal according to a checked result. A touch screen(130) indicates the temperature of the connection unit and the ambient temperature and outputs an alerting message. A robustness assessment unit(140) collects temperature data and analyzes data about the temperature of the connection unit and a deterioration progress. The robustness assessment unit utilizes an analyzed result and calculates a robustness assessment index.

Description

Degradation Diagnosis System for Switchgear Connection Using Infrared Temperature Sensors {DETERIORATION DIAGNOSIS SYSTEM FOR CABLE OF DISTRIBUTING BOARD USING IR TEMPERATURE SENSOR}

The present invention detects the connection temperature and the ambient temperature in the switchgear using an infrared temperature sensor and analyzes the detected temperature data to diagnose the deterioration of the connection in the switchgear and deteriorate the switchgear connection using the infrared temperature sensor to self-diagnose the performance of the temperature sensor. It is about a diagnosis system.

In general, switchboards convert special high-voltage power to low pressure in a wide range of power consumers such as residential areas, buildings, schools, factories, ports, airports, water and sewage treatment plants, substations, heavy industry plants, subways, chemical complexes, and steel mills. It is installed in the power distribution system to supply power supply to the power monitoring, control and protection.

This switchgear is a continuous and uniform insulation enclosure with a switchgear body equipped with an open switchgear door for limiting direct contact with the outside and considering the safety of electric shock and fire in the process of use. Considering the reliability of the supply voltage, the installation of various protective equipment such as a circuit breaker and an arrester is essential in the enclosure.

Switchgear and high-voltage electrical facilities used in buildings and industrial plants, etc., due to the rapid increase in the use of electricity is increasing the fire and power failure accidents due to deterioration and poor connection at the connection.

In other words, economic losses due to power failures due to poor connection and deterioration are also increasing, and even though these accidents can be prevented in advance, power failures increase due to the absence of such measuring devices.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described prior art, and the switchboard connection degradation diagnosis using an infrared temperature sensor that detects the junction temperature and the ambient temperature of the switchboard using an infrared temperature sensor and analyzes the detected temperature data to diagnose the junction deterioration of the switchgear. It is to provide a system.

In addition, the present invention is to provide a switchgear junction deterioration diagnosis system using an infrared temperature sensor that periodically improves the reliability of the connection deterioration diagnosis of the switchgear by self-diagnosing the performance of the infrared temperature sensor.

In addition, the present invention is to provide a connection degradation diagnosis system for a switchgear using an infrared temperature sensor for measuring the junction temperature and current of the switchgear and using the measured value to diagnose the switchgear junction degradation.

Switchgear junction deterioration diagnostic system using an infrared temperature sensor according to an embodiment of the present invention for achieving the above object is a temperature sensor module for detecting the junction temperature and the ambient temperature in the switchgear, and through the self-diagnosis of the temperature sensor module Check the operation periodically, measure the connection temperature and the ambient temperature at a predetermined time period through the temperature sensor module, calculate the connection average temperature and the ambient average temperature using the measured temperature data, the calculated connection average Calculate the temperature difference between the temperature and the ambient average temperature, check if the average temperature of the connection exceeds the preset maximum allowable temperature range, check if the temperature difference exceeds the preset temperature increase limit range, and alarm or cut off the signal according to the result of the check. The controller to generate and the control of the controller Displaying the connection temperature and the ambient temperature, and outputs an alarm message, the touch screen is installed on the outer surface of the switchgear body, and collects the temperature data output from the temperature sensor module to analyze the data on the temperature and deterioration trend of the switchgear It includes a soundness evaluation unit that uses the analysis results to calculate the soundness evaluation index.

Accordingly, the switchboard deterioration diagnosis system using the infrared temperature sensor according to the present invention can detect the junction temperature and the ambient temperature of the switchboard using the infrared temperature sensor and analyze the detected temperature data to diagnose the junction deterioration of the switchboard.

In addition, the present invention can detect the temperature and current of the connection at the same time, and by analyzing the detected temperature and current to diagnose the degradation of the connection, it is possible to improve the accuracy of the alarm.

In addition, the present invention periodically improves the performance of the temperature sensor, it is possible to improve the reliability of the degradation diagnosis of the switchgear.

1 is an example showing the configuration of a switchgear according to the present invention.
2 is a block diagram of a switchgear junction deterioration diagnosis system using a temperature sensor according to an embodiment of the present invention.
3A is a diagram illustrating an appearance of a temperature sensor module shown in FIG. 2.
3B is a block diagram illustrating the temperature sensor module of FIG. 2.
3C is a circuit diagram of the temperature sensor module of FIG. 2.
4 is a flowchart illustrating a method for diagnosing degradation of a switchgear connection unit according to an embodiment of the present invention.
5 is a flowchart illustrating a method for diagnosing degradation of a switchboard connection unit according to another exemplary embodiment of the present invention.
6 is an example of a membership function graph related to the present invention.
7 is an example of a screen displaying a health evaluation index related to the present invention.

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

The present invention installs a non-contact temperature sensor module on the high and low voltage side of the switchgear and the cable connection, the terminal connection of the switchgear and breaker to detect the connection and the ambient temperature, and through the degradation diagnosis using the detected temperature data The present invention relates to a method for diagnosing the life of a switchgear.

1 is an example showing the configuration of a switchgear according to the present invention.

As shown in FIG. 1, the switchboard 100 has a plurality of spaces separated up and down, and includes a switchboard body 10 having doors formed on one side or both sides of the front and rear sides thereof, and a fault formed in the upper space of the body 10. Power cut-off control unit 40 having a section automatic switch 20, a transformer 30 formed in the lower space, a parking circuit breaker 41 and a wiring circuit breaker 42 formed in the front space, and a power fuse formed in the rear upper part ( 50) and an arrester 60 and an instrument transformer 70 formed thereunder.

The body 10 is divided into a partition wall 11 having a predetermined thickness to distinguish between the high pressure side and the low pressure side, and is formed to reduce noise by using a high-level sound absorbing insulation.

In addition, the input side terminal of the failure section automatic switchgear 20 through the insulating connecting member 90 and the fixing member 91 formed in the upper portion of the switchboard body 10 from the inlet 10a formed at the front lower side of the switchboard body 10. Connected to

In addition, a connection cable is connected to the output side terminal of the failure section automatic switch 20 through a lightning arrester 60, a current-limiting power fuse 50, and a transformer transformer 70 for instrumentation. It is installed to be authorized.

2 is a block diagram of a switchgear junction deterioration diagnosis system using a temperature sensor according to an embodiment of the present invention.

Referring to FIG. 2, the switchboard deterioration diagnosis system is installed in a busbar and a connection part of a switchgear and a temperature sensor module 110 that detects the busbar and the connection part temperature and the ambient temperature, and is detected by the temperature sensor module 110. The controller 120 receives the received temperature data and compares the received temperature data with a preset reference value to diagnose whether the busbar and the connection are deteriorated.

The temperature sensor module 110 and the controller 120 uses a frequency modulation method and transmits data through communication such as RS-485, and reduces the power line and the communication line of the temperature sensor module 110 from 4 strands to 2 strands. Was adopted. In the present invention, using the infrared temperature sensor disclosed in Korean Patent No. 894128 and Korean Patent No. 862031 uses a temperature detection method of the switchgear connection.

The controller 120 checks whether the bus bar and the connection part temperature and the ambient temperature deviate from the maximum allowable temperature range and the temperature rise limit, and compares the temperature slope per unit time with a preset reference value, and as a result, the temperature gradient per unit time is increased. If the reference value is exceeded, an alarm or cutoff signal is generated.

In addition, the controller 120 is equipped with a function code for the sensor module self-diagnosis (Function Code) to the communication protocol to periodically determine whether the temperature sensor module 110 is operating normally for the temperature sensor module 110 Design the function to diagnose the operating status by itself.

The controller 120 transmits the following codes for self-diagnosis of the contact temperature sensor and the ambient temperature sensor in the request mode to the temperature sensor module 110.

-Temperature sensor self diagnosis function code: 0x15

-Ambient temperature sensor self diagnosis function code: 0x45

The temperature sensor module 110 executes the received self-diagnosis code to check whether there is a failure, and transmits the following abnormality code to the controller 120 in a response mode to the controller 120. .

-Contact Temperature Sensor Error Function Code: 0x1F

-Abnormal contact temperature sensor Function Code: 0x10

-Ambient temperature sensor error Function code: 0x4F

-Ambient temperature sensor no function code: 0x40

The embedded touch screen 130 is installed on one of the plurality of system surfaces constituting the switchboard. The touch screen 130 receives and displays temperature data such as busbar and connection temperature and ambient temperature transmitted from the controller 120 through RS-485 communication on the screen. Accordingly, the user may check the information displayed on the touch screen 130 and input a control signal through the touch screen 130. The touch screen 130 simultaneously serves as an input device as well as a display device.

In addition, the switchboard deterioration diagnosis system includes a health evaluation unit 140 for receiving the temperature data measured by the temperature sensor module 110 to monitor the state of the switchgear. The health evaluation unit 140 may be implemented as a personal computer, a notebook, a mobile terminal, and the like. The soundness evaluation unit 140 provides data and analysis results on temperature and deterioration trends based on the temperature data provided from the temperature sensor module 110. In addition, the health evaluation unit 140 provides a user interface to control a trip signal that can control the operation of the breaker and the switch. Therefore, the user can conveniently check the data and analysis results of the temperature and deterioration trend in the switchgear, and can remotely control the operation of the breaker and the switchgear of the switchgear.

Figure 3a is a view showing the appearance of the temperature sensor module shown in Figure 2, Figure 3b shows a block diagram of the temperature sensor module of Figure 2, Figure 3c shows a circuit diagram of the temperature sensor module of Figure 2 Drawing.

3A to 3C, the temperature sensor module 110 includes a laser pointer 111 for position calibration, an infrared sensor 112, a power supply 113, and a voltage-frequency converter (VF) 114. It consists of.

The laser pointer 111 is composed of a laser diode, and is used for adjusting the focus and distance between the object and the center of the infrared sensor 112 when the temperature sensor module 110 is first installed. As such, the laser pointer 111 may prevent an incorrect temperature detection error due to a mismatch in focus of the infrared sensor 112.

In addition, a light emitting diode (LED) may be mounted on the rear surface of the controller 120 to configure whether the temperature sensor module 110 is currently operating normally.

As the service life of the switchgear increases, there is a possibility that the distance between the temperature sensor module 110 and the installed distance due to vibration and deterioration of power devices such as transformers and busbars may deviate from the initial installation position. In order to prevent this, the laser pointer 111 may be used to determine whether the temperature of the temperature sensor module 110 matches the initial installation position. That is, when the laser pointer 111 needs to correct the position of the temperature sensor module 110, the user presses an operation button (not shown) provided in the temperature sensor module 110 to check whether the focus of the sensor is at the correct position. Used to

The laser pointer 111 is operated by a sinusoidal wave signal of 500 ms periods generated by an oscillator using a Schmitt trigger circuit, and is configured to identify an accurate target position of the infrared sensor 112.

Specifications of the non-contact infrared temperature sensor module 110 applied to this embodiment are shown in Table 1 below.

Item Specifications Measurement temperature range -30 ℃ ~ + 500 ℃ (temperature correction according to condition) Operating power + 9V (constant current power supply) Rated consumption current 20 mA MAX. Measurement response speed 5 mS Operating temperature range -20 ℃ ~ + 90 ℃ Measurement temperature data transmission V-F conversion method INDICATOR Laser Diode Measurement Unit Display Cable length 30M Temperature sensitivity 15 mV / ℃

The infrared sensor 112 measures a temperature of a subject (booth bar and a connecting part), and is connected to a reference output (1.225Vdc) and a circuit for outputting an analog output proportional to the measured temperature.

By reducing the power line and the communication line of the temperature sensor module 110 from 4 strands to 2 strands, the wiring for the plurality of sensor connection lines can be simplified, thereby reducing external noise.

The infrared sensor 112 measures the temperature of the object under test and transmits the measured temperature data to the V-F converter 114.

The V-F converter 114 converts to a frequency corresponding to the temperature data level measured by the infrared sensor 112, and the converted frequency is added to the power line connected to the constant current source through the capacitor C1.

The power supply 113 is a + 5V constant voltage source and supplies power to the laser pointer 111, the infrared sensor 112, and the V-F converter 114.

The V-F converter 114 is a circuit converting and outputting the measured input voltage Vdc into a frequency, and operates in the range of 1 Hz to 10 KHz.

The oscillation frequency output is calculated as the following number 1.

The output of the V-F converter 114 is output as a comparison voltage output, a conversion frequency output, and a current output at a threshold value THRESHOLD according to a value input to the measurement Vdc input terminal. Use resistors R4 and VR5 to set the frequency output gain and resistors R1, R2 and capacitor C2 to adjust the tolerance.

The temperature output level AOT of the infrared sensor U2 112 measured from the object under test is input to the VF converter U1 114, and is compared with the reference level AOR of the infrared sensor 112 to a level for the output difference. Frequency conversion is performed.

The converted frequency output to the terminal F-OUT of the V-F converter 114 is connected to the input connection point J1 of the constant current source through the capacitor C5 after the impedance conversion is performed in the transistor Q1 to output a frequency signal to the power line.

The power supply 113 converts the + 9V power input from the constant current source J1 into a constant voltage + 5V power and supplies the power to the laser pointer 111, the infrared sensor 112, and the V-F converter 114.

The conversion frequency output to the constant current source J1 is amplified by only separating the frequency signal in the controller 120, and then converted to a DC voltage signal by the F-V converter that converts the frequency back to a voltage signal is displayed as the measured temperature.

By using wired or wireless communication such as RS-485, Wi-Fi, CDMA, and the like, the temperature-related information is remotely transmitted to a health evaluation unit (Man Machine Interface, MMI) 140 to configure a system for user convenience. The health evaluation unit 140 configures not only the information displayed on the display of the controller 120 but also screens for trend analysis data and reports such as daily reports, monthly reports, and yearly reports, event occurrence records, and the like, so that the user analyzes the cause of switchboard deterioration. And to ensure that actions are taken promptly.

4 is a flowchart illustrating a method for diagnosing degradation of a switchgear connection unit according to an embodiment of the present invention.

Referring to FIG. 4, the controller 120 sets a diagnosis criterion (reference range) which is a criterion for diagnosing a time period and deterioration input through the touch screen 130 (S11). Here, the diagnostic criteria include the temperature rise limit and the maximum allowable temperature. The time period is set according to the material and environment of the connection part, and the temperature rise limit and the maximum allowable temperature are generally set based on the values specified in IEC964 according to the type of busbars and cables (see Table 2).

The controller 120 detects the connection part temperature and the ambient temperature of the bus bar and the cable using the temperature sensor module 110 and displays the detected temperature data on the touch screen 130 (S12).

At this time, the controller 120 measures the connection temperature and the ambient temperature through the temperature sensor module 110 at an initial set time period and calculates an average value of the connection temperature and the ambient temperature using the measured temperature data. (S13). In addition, the controller 120 displays the calculated average temperature of the connection part and the ambient average temperature on the touch screen 130.

In addition, the controller 120 calculates a difference between the average temperature of the connection portion and the ambient average temperature (S14).

The controller 120 checks whether the calculated average temperature and temperature difference exceed the set diagnostic criteria (S15). The controller 120 checks whether the calculated temperature difference is within the set temperature increase limit range, and checks whether the connection average temperature is within the set maximum allowable temperature range.

As a result of the check, when the calculated average temperature and the temperature difference exceed the set diagnostic criteria, the controller 120 determines that it affects the insulation deterioration of the connection part and displays a danger alarm message on the touch screen 130. It may be output through the speaker (not shown) (S16). In this case, the controller 120 may calculate the health evaluation index through the health evaluation unit 140 and display the health evaluation index on the display screen.

On the other hand, if the calculated average temperature and the temperature difference does not exceed the set diagnostic criteria, the controller 120 calculates a health evaluation index through the health evaluation unit 140 (S17).

5 is a flowchart illustrating a method for diagnosing degradation of a switchboard connection unit according to another exemplary embodiment of the present invention.

First, the controller 120 sets diagnostic criteria such as time period, current slope, and temperature increase limit (S21). Here, the time period was set arbitrarily from 1 minute to 30 minutes at intervals of 1 minute depending on the installation environment.

The controller 120 measures the current connection temperature and the ambient temperature through the temperature sensor module 110, and measures the current of the current connection using a current sensor (not shown) (S22). In addition, the controller 120 drives the temperature sensor module 110 after the set time period elapses to measure the connection temperature and the ambient temperature, and also measures the current of the connection through a current sensor (not shown) (S23).

When the connection temperature before and after the set time period and the ambient temperature and the connection current is measured, the controller 120 calculates the temperature difference and current difference before and after the set time period (S24).

In addition, the controller 120 checks whether the calculated temperature difference and current difference exceed an allowable range (diagnosis basis) (S25). In other words, the controller 120 calculates the temperature difference before and after the time period because the determination of the deterioration of the connection between the busbar and the insulated cable has a significant effect on the performance and durability of the temperature detection sensor, and the calculated temperature difference is within the temperature difference rising limit range. Check if you are inside

In addition, the controller 120 measures the effective value of the current flowing through the connection part through a current transformer (not shown) without limiting whether the connection part is overheated, but only by calculating the current slope with respect to the effective value before and after a period of time. Check if the current slope exceeds the set angle (30 ~ 80˚) which is the reference value.

As a result of the check, when the calculated temperature difference and current difference exceed the diagnosis criteria (permissible range), the health evaluation index is displayed and the caution and danger alarm are generated (S26).

On the other hand, if the calculated temperature difference and current difference does not exceed the diagnostic criteria (acceptable range), the health evaluation index is calculated and displayed as a percentage (S27).

In this way, the temperature increase rate and the current slope of the connection portion can be detected at the same time to improve the accuracy of display and alarm occurrence.

Hereinafter, a method for calculating a health evaluation index by the switchboard connection deterioration diagnosis system according to the present invention will be described.

The health evaluation unit 140 monitors and analyzes various power parameters of the switchgear. In the present invention, an S-type membership function, which is a fuzzy membership function, is used to deal with the uncertainty of the boundary of the acceptance criteria of each element of the busbar connection in the switchgear and to set an effective membership degree. This method has the advantage that the user can set the degree of belonging desired by adjusting the coefficients.

The membership function of the S type is defined as

는 곡선의 기울기,

는 굴절점이다. Where a is the lower limit of the interval, b is the upper limit of the interval,

Is the slope of the curve,

Is the refraction point.

와 굴절점

을 각각 변화시킨 것으로서 구간 최소 값 a와 구간 최대 값 b는 비교를 위하여 0과 100으로 하였다.Table 3 shows the slope of the curve as an example of the characteristics of this membership function.

And inflection point

The minimum value a and the maximum value b were set to 0 and 100 for comparison, respectively.

값이 커지면 기울기가 샤프해지며, 굴절점

값이 커지면 소속함수의 중심점이 오른쪽으로 이동하는 것을 알 수가 있다. 따라서 곡선 기울기

와 굴절점

를 원하는 값으로 조정하여 특정 검출 값에 따른 기대 값을 사용자가 결정할 수 있게 된다. Referring to FIG. 6, which shows a graph of the membership function of Table 3, the slope of the curve

As the value increases, the slope becomes sharper.

As the value increases, the center point of the membership function moves to the right. Thus curve slope

And inflection point

By adjusting the to a desired value, the user can determine the expected value according to the specific detection value.

division Membership Function 2 Membership Function 3 Membership Function 6 λ 3 6 2

0.2 0.2 0.6 a 0 0 0 b 100 100 100

에 적절한 가중치(weight)

를 곱하여 결과 값을 도출한다. 건전성 평가지수는 아래 수 3과 같이 정의된다.The temperature and current of the switchgear junction are detected and the health evaluation index is calculated using the expected values obtained by each parameter by the membership function. Expected value of each

Weight appropriate for

Multiply by to get the result. The health assessment index is defined as

는 건전성 확률,

는 i번째 데이터의 가중치,

는 i번째 데이터의 기대값,

는 i번째 데이터의 입력값이다.here,

Is the health probability,

Is the weight of the i th data,

Is the expected value of the i th data,

Is the input value of the i th data.

In the present invention, the history of the power equipment and cables, etc. that the soundness evaluation unit 140 constitutes a switchgear by utilizing a method of determining the deterioration according to the use period of the article through the article history management disclosed in Japanese Patent Laid-Open No. 2007-316826. In this case, the period of use of the power equipment and cables is checked through the management history, and the weight is set according to the period of use, and reflected in the health evaluation index and deterioration judgment.

As described above, the health evaluation index algorithm can be divided into a process of calculating the health evaluation index by combining the expected value calculation process part according to each parameter obtained by the fuzzy belonging function and the expected value.

The selection of weights is very important in curve slope and bend indexing of membership functions. Table 4 below shows the weight and data input values for each item using the temperature and current generated at the busbar connection.

As shown in Table 2, the junction temperature rise limit is implemented by the algorithm for the health evaluation index centering on the case of the eastern sub bar for the unplated state in the air.

Since the maximum temperature was set to 75 ° C based on the ambient temperature of 40 ° C, the minimum value was 10 ° C and the maximum value was 75 ° C. The maximum allowable temperature limit of the connection was set to a minimum value of 50 ° C and a maximum value of 105 ° C because the eastern bar for the unplated state in the air was defined up to 105 ° C.

The temperature gradient was set at a minimum of 30 ° to a maximum of 75 ° per unit time during a predetermined period, and the current slope was a minimum of 30 ° to 85 ° per unit time during a predetermined period due to phase loss or short circuit. The slope λ and the refraction point υ of the curve for each item are selected by referring to the resulting data such as fire occurrence and disconnection due to the overheating of the busbar provided by the distributor. The weighting value for each item necessary for the calculation of the health assessment index shall be 0.25.

Indices Item Suggested set point Weight (w) a b λ υ Soundness
Evaluation index Connection temperature rise limit 0.25 10 75 2.0 0.6 Maximum allowable temperature for connection 0.25 50 105 3.0 0.5 Temperature gradient 0.25 0.577 3.73 2.0 0.5 Current slope 0.25 0.577 11.4 3.0 0.6

The soundness evaluator 140 calculates the soundness evaluation index for the busbar connecting part using the numbers 2 and 3, and displays the calculated result on the display of the soundness evaluator 140 as shown in FIG. .

In this embodiment, when the temperature difference between the average temperature of the connection portion and the ambient average temperature does not exceed the allowable range, the time period setting is initialized, the temperature is detected again, and the average value is calculated. In addition, if the average temperature of the connection does not exceed the maximum allowable temperature range, the soundness evaluation algorithm compares the average connection temperature and the maximum allowable temperature to determine whether it is outside the maximum allowable limit for the insulation of the busbar or cable. In this case, the integrity is expressed as a percentage, and if exceeded, the average temperature and the ambient temperature of the connection are immediately displayed, and the calculated evaluation index, danger indication, and alarm can be generated. If the average temperature of the connection does not exceed the maximum allowable temperature range, the time period setting is initialized, the temperature detection and the average value are initialized.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary, and those of ordinary skill in the art to which the present invention pertains should not depart from the spirit and scope of the present invention. It will be apparent that various modifications, changes and equivalent other embodiments are possible without departing. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

110: temperature sensor module
111: laser pointer
112: infrared sensor
113: power supply
114: VF converter
120: controller
130: touch screen
140: health evaluation unit

Claims (8)

A temperature sensor module detecting the connection temperature and the ambient temperature in the switchboard;
Periodically check the normal operation through the self-diagnosis of the temperature sensor module, and measure the connection temperature and the ambient temperature at a predetermined time period through the temperature sensor module and using the measured temperature data, the average temperature and ambient average of the connection Calculates a temperature difference, calculates a temperature difference between the calculated average temperature of the connection portion and the ambient average temperature, checks whether the average temperature of the connection portion exceeds a preset maximum allowable temperature range, and checks whether the temperature difference exceeds a preset temperature increase limit range. A controller for generating an alarm or a cutoff signal according to the checking result;
A touch screen which displays the connection part temperature and the ambient temperature under the control of the controller, outputs an alarm message, and is installed on the outer surface of the switchboard body;
Collecting the temperature data output from the temperature sensor module to analyze the data on the temperature and deterioration trend of the junction of the switchgear and using the analysis results, including a soundness evaluation unit for calculating the soundness evaluation index using an infrared temperature sensor Switchgear connection deterioration diagnosis system. The method of claim 1, wherein the temperature sensor module,
A laser pointer used for position calibration of the temperature sensor module,
An infrared sensor for measuring the connection temperature;
A voltage-frequency converter converting the frequency into a frequency corresponding to the temperature data level measured by the infrared sensor;
The switchboard connection deterioration diagnosis system using an infrared temperature sensor, characterized in that it comprises a power supply for supplying the operating power of the laser pointer, the infrared sensor and the voltage-frequency converter. The method of claim 1, wherein the controller,
When the temperature difference is out of the temperature increase limit range or the connection average temperature is out of the maximum allowable temperature range, a danger alarm is output and a health evaluation index is calculated and displayed. system. The method of claim 1, wherein the controller,
Using the temperature sensor module and the current sensor before and after a predetermined time period, the connection temperature and the connection current are measured to calculate the connection temperature difference and the connection current difference before and after the time period, and whether the calculated connection temperature difference and the connection current difference are outside the allowable range. Deterioration diagnosis system for the switchgear junction using an infrared temperature sensor, characterized in that the check and output the alarm in accordance with the verification result. The method of claim 1, wherein the soundness evaluation unit,
An apparatus for deteriorating and diagnosing a switchgear connection using an infrared temperature sensor, comprising: calculating an expected value for each parameter through a fuzzy-proportional function and calculating the health evaluation index by combining the expected values. The method of claim 5, wherein the soundness evaluation unit,
The switchboard deterioration diagnosis system using an infrared temperature sensor, characterized in that to obtain a health evaluation index by multiplying the calculated expected value by a weight. The method of claim 1, wherein the controller,
The switchboard deterioration diagnosis system using an infrared temperature sensor, characterized in that for transmitting the self-diagnostic function code to the temperature sensor module to diagnose the failure of the temperature sensor module. The method of claim 7, wherein the temperature sensor module,
The switchboard connection deterioration diagnosis system using an infrared temperature sensor, characterized in that for executing the self-diagnostic function code to diagnose the failure itself and transmit the diagnosis result to the controller.

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