KR20070016348A - Trouble diagnosis method and system for circuit breaker - Google Patents

Abstract

Disclosed are an abnormality diagnosis system of an electric circuit breaker and a diagnosis method thereof.

An abnormality diagnosis system of an electric circuit breaker according to the present invention includes a first temperature sensor mounted on an outer circumferential surface of a specific conductor through which an electric current flows in the electric circuit breaker; A second temperature detecting sensor mounted on the outer circumferential surface of the connecting device or the connecting member electrically connected to the same current in the circuit breaker; A signal converter configured to receive temperature information sensed by the first and second temperature sensors and convert the temperature information into an electrical signal; The signal converted through the signal converter is input to calculate a subtraction temperature value by subtracting the temperature value detected by the first temperature sensor from the temperature value detected by the second temperature sensor, and then calculating the subtracted temperature value and And computing means for outputting the degree of connection load of the connection mechanism or the connection member by comparing the preset temperature data with each other.

Therefore, according to the present invention, the configuration of the device is simple, the diagnostic efficiency is very excellent, as well as can be implemented in various forms such as portable, stationary.

 Bushing insulator, insulation switchgear, gas circuit breaker

Description

Fault diagnosis system of electric breaker and diagnosis method {TROUBLE DIAGNOSIS METHOD AND SYSTEM FOR CIRCUIT BREAKER}

1 is a conceptual view of the configuration of an electric circuit breaker.

2 is a schematic diagram of a system for diagnosing abnormalities of an electric circuit breaker according to the present invention;

FIG. 3 is a flow chart illustrating an abnormal diagnosis control of FIG. 2.

Figure 4 is a schematic configuration diagram showing another example of the fault diagnosis system of the electric circuit breaker according to the present invention.

FIG. 5 is an abnormal diagnostic control flow chart of FIG. 4.

Figure 6 is a schematic configuration diagram showing another example of the fault diagnosis system of the electric circuit breaker according to the present invention.

FIG. 7 is an abnormal diagnostic control flow chart of FIG. 6.

<Description of the symbols for the main parts of the drawings>

1: circuit breaker 10: tank

11: connection mechanism 21, 22: bushing insulator

31, 32: Terminal

100, 200, 300: Diagnosis system of electric breaker

110: first temperature sensor 150: second temperature sensor

120: signal converter

130, 240, 340: computing means

210, 220, 230: Temperature sensor unit

310, 320, 330: temperature sensor

The present invention calculates a temperature deviation between a connection mechanism of an electric circuit breaker and another point of a conductor through which the same current flows as the connection mechanism, and compares and judges this, thereby easily detecting the wear state and the connection state of the connection portion of the connection mechanism. The present invention relates to a fault diagnosis system of an electrical circuit breaker and a diagnosis method thereof.

As is well known, an electrical circuit breaker is one of the most important devices in an electrical installation together with a transformer, and is used for the purpose of blocking or opening the flow of electricity.

The types of electrical circuit breakers are mainly the air circuit breakers exposed to the air according to the electrical insulator, the vacuum circuit breakers operated in vacuum, and the sulfur hexafluoride gas (SF ₆ gas) having excellent extinguishing efficiency and insulation efficiency as the insulating medium in the tank. It is roughly classified into a gas insulated switchgear (GIS).

All disconnect devices are provided with contact terminals, which are based on the principle of mechanical connection and disconnection. Therefore, the connecting device is mechanically and electrically connected and disconnected, and it is generally installed in a closed tank except for some air-tight switches.

The purpose of the connection mechanism is to turn on and off the electricity, and as the opening and closing operations of the circuit are repeated, the parts in contact with each other are inevitably damaged mechanically and electrically.

Looking at such damage factors, there are erosion (melting) action by arc caused by mechanical wear and large current as the number of operation is frequent, the former mainly occurs in the breaker of the low pressure system with a relatively high number of input and open times The latter is generated in the high voltage circuit breaker.

When the contact portion of the low voltage circuit breaker or the high voltage circuit breaker is damaged, the contact area becomes relatively small, so that the resistance increases when the connection mechanisms are interconnected, and this increased resistance generates heat. Therefore, the circuit breaker of the type in which the connection mechanism is sealed inside the tank provides the cause of the explosion of the circuit breaker due to the expansion of the internal pressure by the heat generated in the internal space.

Despite these problems, the contact area (wear or incomplete connection) in the closed tank (container) can not be confirmed from the outside so that the connection area is calculated with the internal resistance value measured at the main circuit resistance at both ends of the circuit breaker. Only by this method, such a diagnosis method requires a power failure of the device. Therefore, even if it was necessary to predict the operation stop time and complete the diagnosis within a given time, it was inconvenient to understand the problem within the given time.

The present invention has been made to solve the above problems, the fault diagnosis system of the electrical circuit breaker according to the present invention, as well as the electrical circuit breaker, can be applied to both the insulation switch, contact area due to wear or erosion of the connection mechanism By measuring the rise in temperature due to the decrease, and measuring the temperature of conductors at different locations through which the same current flows, they can be compared and analyzed with each other to diagnose the abnormality of the connecting device according to the temperature deviation simply and quickly. It is an object of the present invention to provide a fault diagnosis system of the electric circuit breaker and a method of diagnosing the fault, as well as not disassembling the fault.

Another object of the present invention is to provide an abnormality diagnosis system of an electric circuit breaker which can be implemented in various forms such as a portable type diagnosis device as well as a stationary type because of its simple principle and configuration.

It is still another object of the present invention, since it is possible to easily select the heat generating points according to the temperature deviation, as well as whether the breaker connection abnormality, it is easy to diagnose and / or monitor the abnormality of the line connection, loosening of the tightening screw, etc. The present invention provides a diagnosis system for abnormalities of an electric circuit breaker.

An abnormality diagnosis system for an electric circuit breaker according to the present invention for achieving the above object includes a first temperature sensor mounted on an outer circumferential surface of a conductor of a specific portion through which a current of the electric circuit breaker flows;

A second temperature detecting sensor mounted on the outer circumferential surface of the connecting device or the connecting member electrically connected to the same current in the circuit breaker;

A signal converter configured to receive temperature information sensed by the first and second temperature sensors and convert the temperature information into an electrical signal;

The signal converted through the signal converter is input to calculate a subtraction temperature value by subtracting the temperature value detected by the first temperature sensor from the temperature value detected by the second temperature sensor, and then calculating the subtracted temperature value and Computing means for comparing the preset temperature data with each other and outputting the degree; Its features are to include.

In addition, the present invention may also be implemented as an abnormality diagnosis system of an electric circuit breaker, in detail, a plurality of first mounted on an outer circumferential surface of an input side bushing insulator, in which AC power having a different phase is input to each of the electric circuit breakers, respectively. Temperature sensor;

A plurality of second temperature sensing sensors each mounted on a predetermined outer circumferential surface of the tanks of the plurality of electrical circuit breakers, each of which is connected to the connection load temperature of the plurality of connection mechanisms;

The first and second temperature sensors are electrically connected to each other to receive the temperature information detected from the temperature sensors, and then at the detected temperature value received from the second temperature sensor mounted on each of the circuit breakers. After calculating the connection load temperature of each connecting device by subtracting the sensed temperature values received from the first temperature sensor mounted on the same electrical circuit breaker, and comparing the calculated connection load temperatures of the connecting device with each other, Computing means for detecting the breaker to determine and output the abnormality of the connection mechanism; Its features are to include.

In another embodiment of the abnormality diagnosis system of the electrical circuit breaker according to the present invention, among the tanks of the electrical circuit breakers of different phases, each of the tanks of the circuit breaker is mounted on a predetermined outer circumferential surface in which the connecting mechanism is embedded, and thus the connection load temperature of the plurality of connecting apparatuses A plurality of temperature sensing sensors for measuring each;

An electrical connection device is connected to the plurality of temperature sensors and receives respective temperature information detected by the temperature sensors, and then compares the received temperature signals with each other to detect an electrical circuit breaker having a relatively high temperature, thereby detecting abnormality of the corresponding connecting device. Computing means for determining and outputting whether or not;

It can be implemented in the form of a large reduction in the number of temperature sensor, while only the connection load of each connection mechanism can be detected and easily compared to each other, it is possible to efficiently operate and install the system, etc. have.

Here, the computing means may further include an A / D converter for converting the temperature information received from the temperature sensor into an electrical signal.

In addition, an A / D converter may be further included between the temperature sensors and the computing means to convert a signal received from the plurality of temperature sensors and output the converted signal to the computing means.

Preferably, the computing means, the temperature data for each connection load of the connection mechanism for each temperature of the tank is provided, and the connection load temperature from the connection load temperature data according to the temperature information received from the temperature sensing sensors A storage medium storing a program for reading out and determining whether or not there is an error according to the degree of connection load of the connection device;

Communication module for receiving a temperature signal from the temperature sensor;

A central control processing unit which collectively controls the program, the communication module, and the storage medium; Its features are to include.

In addition, the fault diagnosis system according to the present invention is applicable to the fault diagnosis system of the insulation switch, wherein the fault detection system of the electrical circuit breaker, the first and second temperature sensor, the second temperature sensor Is mounted on the outer circumferential surface of the tank corresponding to the connection switch of the insulated switchgear, and the first temperature sensor is mounted on the outer circumferential surface of the tank spaced a predetermined distance from the second temperature sensor, the abnormality of the connection switch of the insulated switchgear. The feature is that it can be made to determine whether or not.

The fault diagnosis system of the electric circuit breaker having these characteristics can be implemented in a portable type, it can be easily applied to the use of the occasional check and diagnosis, etc., not always the diagnosis system.

However, the fault diagnosis system of the circuit breaker according to the present invention can be implemented as a regular diagnostic system, and the computing means in this case outputs a predetermined alarm sound when any one of the plurality of circuit breakers is abnormal. A speaker may be additionally included.

As a method of diagnosing an abnormality of the electrical circuit breaker according to the above-described abnormality diagnosis system of the electrical circuit breaker

a) detecting, by the first and second temperature sensing sensors, a temperature of each part of each circuit breaker to which the AC power of each phase is input and output, and outputting the temperature to the computing means;

b) calculating the connection load temperature of each connection device of the electric circuit breaker by subtracting the detection temperature value of the first temperature sensor from the temperature detected by the second temperature sensor mounted on each of the circuit breakers; ;

c) comparing the calculated connection load temperatures with each other to determine an electric circuit breaker having a relatively high temperature and outputting the result;

It is characterized by the fact that it is possible to determine whether the breaker is abnormal.

Meanwhile, as another method for diagnosing abnormality of the circuit breaker according to the fault diagnosis system of the circuit breaker,

a) detecting a temperature of a tank of each electric circuit breaker to which an AC power of each phase is input and output through temperature sensing sensors and outputting the temperature to the computing means;

b) comparing the temperatures of the tanks with each other to determine an electric circuit breaker having a relatively high temperature and outputting the result;

Through the bar can determine whether the abnormality of the circuit breaker, it is characterized in that it can be variously applied and modified using the temperature deviation.

On the other hand, the fault diagnosis method of the insulation switch according to the fault diagnosis system of the insulation switch mentioned above,

a) detecting, by the first and second temperature sensors, the temperature of each part of each insulation switch input and output of each phase of AC power through the first and second temperature sensors and outputting the temperature to the computing means;

b) calculating the connection load temperature of each connection mechanism of each of the insulation switchgear by subtracting the sensing temperature value of the first temperature sensor from the sensing temperature value of the second temperature sensor mounted on each of the insulation switchgear; ;

c) comparing the calculated connection load temperatures with each other to determine an electric circuit breaker having a relatively high temperature and outputting the result;

It can be implemented to determine whether the insulation switch is abnormal.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the examples presented are for illustrative purposes only, and the technical spirit of the present invention is not limited to these examples.

1 is a conceptual diagram of the electrical circuit breaker 1.

Figure 1 shows a gas circuit breaker (Gas Circuit Breaker) which is one of the high voltage electric circuit breaker, the gas circuit breaker is a tank 10 for accommodating the connection mechanism 11 therein as the general high voltage circuit breaker And sulfur hexafluoride gas (SF ₆ gas) having an insulation effect and arc extinguishing such as an arc generated during the connecting operation of the connecting device 11 is filled in the tank 10. have.

When the connection mechanism 11 is in a connected state, an input current is inputted to the input side bushing insulator 21 through the terminal 31 and the output side bushing insulator 22 and the output side terminal 32 via the coupling mechanism 11. Through the output of the current is made.

In theory, assuming that the contact surface of the connecting device 11 is in a perfect state without damage and maintains a perfect connecting state mechanically, since the contact resistance of the connecting device 11 is almost zero, The temperature of the conductor (Bus or Cable) at a point different from the temperature is measured equally. However, when the contact surface of the connection mechanism 11 is worn or mechanically incompletely connected, the temperature of the conductor at another point is constant, while the temperature of the connection mechanism 11 increases as the resistance to generation increases. Therefore, as the number of defects of the connecting mechanism 11 increases, the temperature increases in proportion thereto. By using the temperature deviating characteristics, it is possible to easily and easily diagnose the internal contact state and abnormality of the circuit breaker even without stopping the operation of the circuit breaker.

First Embodiment

FIG. 2 is a schematic diagram of a fault diagnosis system 100 of an electric circuit breaker according to the present invention, and FIG. 3 is a fault diagnosis control flow diagram S10 of FIG. 2.

As shown, the configuration of the system according to the present invention is the first and second temperature sensor 110, 120, the signal converter 150, the computing means 130, and a connecting line for electrically connecting them (not shown) O).

The first temperature sensor 110 is mounted on a corresponding outer circumferential surface corresponding to a portion of the input side or output side bushing insulators 21 and 22 in which the current flows, and the second temperature sensor 120 of FIG. 1 mentioned above. Is mounted on the outer peripheral surface of the tank 10 corresponding to the connection mechanism 11, i.e., the connection resistance.

When the abnormal diagnosis system according to the present invention is operated, the temperature information detected by the first and second temperature sensors 110 and 120 is input to the signal converter 150, and the signal converter 150 is The computing means 130 implemented by a PC, a PLC, a SCADA, or the like is converted into an electrical signal of a suitable type so that it can be recognized, and then the converted temperature information is transmitted to the computing means 130.

At this time, if the connection mechanism 11 is in a state of making contact with each other, the temperature information detected from the first and second temperature sensors 110 and 120 input to the computing means 130 is measured differently. do.

The computing means 130 is equipped with a separate program that functions to determine and output the degree of connection load according to the temperature-specific signal input to the bar, the computing means 130 is to receive the received temperature information On the basis of the control unit to output the degree of the connection load of the connection mechanism 11 through the display or to the speaker in the form of an alarm sound.

Hereinafter, the control flow of the system according to the present invention will be described in more detail with reference to the control flow diagram S10 of FIG. 3.

The first and second temperature sensors 110 and 120 sense the temperature at one point different from the load expected point to perform the abnormal diagnosis (S11).

The sensed temperature information is input to the signal converter 150 and converted into a digital signal (S12), and then the deviation of the two temperatures input by the program input and mounted to the computing means 130 (S13). Next, when the calculated value is a value within the allowable range of the connection resistance by comparing the value calculated through the step (S13) and the data consisting of the allowable range information of the connection resistance built in the program, the connection failure information Does not output the output, if the allowable range is exceeded and outputs the connection failure information (S15).

Therefore, it is simple and quick to connect the connection mechanism by calculating the temperature deviation of one point where the connection load is to be measured and the other point where there is no concern, and comparing it with data having connection resistance tolerance information. Since efficiency, connection abnormality, etc. can be easily detected, there is an advantage that it is possible to always diagnose without the need to interrupt the operation of the circuit breaker.

Second Embodiment

Figure 4 is a schematic configuration diagram showing another example of the fault diagnosis system of the electric circuit breaker according to the present invention, Figure 5 is a fault diagnosis control flow diagram (S20) of Figure 4, of the high voltage electric circuit breaker applied to the three-phase AC power supply An example of a fault diagnosis system is shown.

As shown in the drawing, a plurality of temperature sensing sensor units 210, 220, and 230 having a first and second temperature sensing sensors of the above-described configuration are provided.

Referring to FIG. 5, the control principle will be described in detail. The first and second temperature sensors 110 and 120 detect a temperature at a point different from the load expected point to which the abnormality is to be diagnosed ( S21). The sensed temperature information is input to the signal converter 150 and is then input to the computing means 240 through the step S22 of being converted into a digital signal. All temperatures input by the program mounted in the computing means 240. In step S23, the arithmetic mean is calculated to calculate the average value. Subsequently, a temperature deviation calculation step S24 of calculating temperature deviations of each of the plurality of temperature detection sensor units 210, 220, and 230, respectively, is performed.

Next, comparing the average value derived through the steps (S23, S24) and the temperature deviation value of each of the plurality of temperature sensor unit (210, 220, 230) electric temperature deviation value is equal to or greater than the average value Detecting and outputting only the circuit breaker (S25) proceeds to determine and output the abnormality of the circuit breaker that exceeds the average value by comparing the temperature of each of the circuit breakers of the three phases respectively input and output electricity having a relatively high temperature Determine the breaker.

Therefore, according to this method, it is possible to easily and easily discriminate a circuit breaker having a relatively large connection resistance by comparing the connection temperatures of the circuit breakers of different phases. The advantage is that you can get diagnostic results.

Third Embodiment

6 is a schematic configuration diagram showing another example of an abnormality diagnosis system of an electric circuit breaker according to the present invention, and FIG. 7 is a fault diagnosis control flow chart of FIG. 6, one of a plurality of electric circuit breakers to which a multi-phase AC power is input. A diagnosis system and a method of diagnosing only the temperature information received from them by mounting only a temperature detecting sensor are shown.

As shown in FIG. 6, one temperature sensor 310, 320, 330 is mounted on the outer circumferential surface of the tank corresponding to the connection mechanism of the electric circuit breaker to which the AC power of each phase having a different phase is input, and the temperature thereof Compare / analyze only the electric circuit breaker having a relatively high temperature.

Looking at the control principle in more detail with reference to Figure 7, the step of detecting the temperature of the point to be diagnosed through the respective temperature sensor (310, 320, 330) is carried out (S31). The detected temperature information is input to the signal converter 150 and converted into a digital signal (S32) to the computing means 340 to input all the temperature information input by the program mounted in the computing means 340. Arithmetic mean calculation is performed to calculate the average value (S33). Next, by comparing / analyzing the average value derived through the step (S33) and the temperature information input from the plurality of temperature sensor (310, 320, 330) to detect and output only the circuit breaker equal to or greater than the average value As step S34 proceeds, only the corresponding circuit breaker above the average value is determined.

Therefore, by installing only one temperature sensing sensor in each electrical circuit breaker, it is easy to discriminate only the electrical circuit breakers having a relatively high temperature among the electrical circuit breakers in which the three-phase AC power inputs and outputs, respectively, greatly reducing the number of temperature sensing sensors. It is possible to obtain an excellent abnormal diagnosis result.

The present invention can be applied and manufactured in various fields and forms. That is, in the above-described embodiments, only the electric circuit breaker is taken as an example, but it is a matter of course that a fault diagnosis of a switching terminal such as a gas insulated switchgear may be easily performed. Gas insulated switchgear is composed of several devices such as circuit breaker, bus disconnector, line side disconnector, bus or cable connection part in the long tank, so that the current flowing conductors are all connected. Therefore, the temperature sensor is attached to the part where the switching terminal is built, and another temperature sensor is attached to another position at a distance therefrom, so as to adjust the temperature deviation of both parts as in the above-described embodiment. It can be compared with each other and diagnosed as abnormal.

The present invention can be produced and applied in various forms. For example, it may be implemented as a continuous monitoring system attached to each electrical circuit breaker, or may be implemented in the form of a portable type etc. for performing a temporary diagnosis.

As described above, according to the present invention, it is possible to easily diagnose the connection load, connection efficiency, connection abnormality, etc. in real time even in the operating state of the electric circuit breaker.

In addition, since the temperature deviation is used, it is possible to provide an abnormality diagnosis system of the electrical circuit breaker with excellent diagnostic efficiency and a diagnostic method thereof.

Claims (12)

A first temperature sensor mounted on an outer circumferential surface of any conductor of the circuit breaker; A second temperature detecting sensor mounted on the outer circumferential surface of the connecting device or the connecting member electrically connected to the same current in the circuit breaker; A signal converter configured to receive temperature information sensed by the first and second temperature sensors and convert the temperature information into an electrical signal; The signal converted through the signal converter is input to calculate a subtraction temperature value by subtracting the temperature value detected by the first temperature sensor from the temperature value detected by the second temperature sensor, and then calculating the subtracted temperature value and Computing means for comparing the preset temperature data with each other and outputting the degree; Abnormal diagnosis system of an electrical circuit breaker comprising a. A plurality of first temperature sensing sensors mounted on an outer circumferential surface of an input side bushing insulator, into which an AC power source having a different phase is respectively input to each of the plurality of electrical circuit breakers; A plurality of second temperature sensing sensors each mounted on an outer circumferential surface of the tank in which a connection mechanism is embedded, among the tanks of the plurality of electric circuit breakers, for respectively measuring connection load temperatures of the plurality of connection mechanisms; Receive each temperature information detected by the temperature sensing sensors electrically connected to the plurality of first and second temperature sensing sensors, and then at the sensing temperature value received from the second temperature sensing sensors mounted on the respective circuit breakers. After calculating the connection load temperature of each connecting device by subtracting the sensed temperature values received from the first temperature sensor mounted on the same electrical circuit breaker, and comparing the calculated connection load temperatures of the connecting device with each other, Computing means for detecting the breaker to determine and output the abnormality of the connection mechanism; Abnormal diagnosis system of an electrical circuit breaker comprising a. A plurality of temperature sensing sensors for measuring the connection load temperature of each of the plurality of connection mechanisms are respectively mounted on the predetermined outer circumferential surface of the tanks of the plurality of electrical circuit breakers in which the connection mechanisms are embedded. ; An electrical connection device is connected to the plurality of temperature sensors and receives respective temperature information detected by the temperature sensors, and then compares the received temperature signals with each other to detect an electrical circuit breaker having a relatively high temperature, thereby detecting abnormality of the corresponding connecting device. Computing means for determining and outputting whether or not; Abnormal diagnosis system of an electrical circuit breaker comprising a. The method of claim 2 or 3, wherein the computing means, And an A / D converter for converting the temperature information received from the temperature detection sensors into an electrical signal. The method according to claim 2 or 3, Between the temperature sensors and the computing means, And an A / D converter for converting a signal received from the plurality of temperature sensing sensors and outputting the signal to the computing means. The method of claim 2 or 3, wherein the computing means, Temperature data for each connection load of the connection device is provided for each temperature of the tank, and the corresponding connection load temperature is read from the connection load temperature data according to temperature information received from the temperature sensing sensors, and then the connection of the connection device is connected. A storage medium storing a program for determining and outputting an abnormality according to the degree of load; Communication module for receiving a temperature signal from the temperature sensor; A central control processing unit which collectively controls the program, the communication module, and the storage medium; Abnormal diagnosis system of an electric circuit breaker comprising a. The first and second temperature sensor of the fault diagnosis system of the electric circuit breaker according to claim 2, The second temperature sensor is mounted on the outer peripheral surface of the tank corresponding to the connection switch of the insulation switch, the first temperature sensor is mounted on the outer peripheral surface of the tank spaced a predetermined distance from the second temperature sensor and insulated An abnormality diagnosis system of an insulation switchgear, characterized in that it is made to determine whether or not the connection switch of the switch. The method according to claim 2 or 3, The fault diagnosis system of the circuit breaker is a fault diagnosis system of the circuit breaker, characterized in that implemented in a portable. The method according to claim 2 or 3, The fault diagnosis system of the electric circuit breaker is implemented as a regular diagnosis system, The computing means, the abnormality diagnosis system of the electric circuit breaker further comprises a speaker for outputting a predetermined alarm sound when any one of the plurality of electric circuit breaker. The fault diagnosis system of the circuit breaker according to claim 2, a) detecting, by the first and second temperature sensing sensors, a temperature of each part of each circuit breaker to which the AC power of each phase is input and output, and outputting the temperature to the computing means; b) calculating the connection load temperature of each connection device of the electric circuit breaker by subtracting the detection temperature value of the first temperature sensor from the temperature detected by the second temperature sensor mounted on each of the circuit breakers; ; c) comparing the calculated connection load temperatures with each other to determine an electric circuit breaker having a relatively high temperature and outputting the result; The fault diagnosis method of the circuit breaker, characterized in that for determining whether the breaker. The fault diagnosis system of the electric circuit breaker according to claim 3, a) detecting a temperature of a tank of each electric circuit breaker to which an AC power of each phase is input and output through temperature sensing sensors and outputting the temperature to the computing means; b) comparing the temperatures of the tanks with each other to determine an electric circuit breaker having a relatively high temperature and outputting the result; Diagnosis method of the breaker, characterized in that for determining whether the breaker of the breaker. The abnormality diagnosis system of the insulation switchgear according to claim 7, a) detecting, by the first and second temperature sensors, the temperature of each part of each insulation switch input and output of each phase of AC power through the first and second temperature sensors and outputting the temperature to the computing means; b) calculating the connection load temperature of each connection mechanism of each of the insulation switchgear by subtracting the sensing temperature value of the first temperature sensor from the sensing temperature value of the second temperature sensor mounted on each of the insulation switchgear; ; c) comparing the calculated connection load temperatures with each other to determine an electric circuit breaker having a relatively high temperature and outputting the result; Diagnosis method of the insulation switch characterized in that it determines whether the insulation switch is abnormal.

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