WO2017099341A1

WO2017099341A1 - Smart temperature measuring device

Info

Publication number: WO2017099341A1
Application number: PCT/KR2016/011227
Authority: WO
Inventors: 연영모; 조혜림; 최성일; 서덕규; 유흥렬
Original assignee: (주)메티스
Priority date: 2015-12-10
Filing date: 2016-10-07
Publication date: 2017-06-15
Also published as: KR101747342B1

Abstract

The present invention relates to a smart temperature measuring device wherein temperatures (T) measured with regard to terminals of respective phases (R, S, T) of a circuit breaker are displayed through first, second, and third display units, and the same comprises a selection button and an increase/decrease button configured such that, through manipulations thereof, the first setting value threshold1 (TH1), which is the reference temperature of each phase, can be adjusted, thereby simplifying manipulations and substantially improving convenience in use; the same comprises a temperature sensing device, which is configured by a K-type thermocouple, and terminal portions for connecting "+" and "-" metals of respective K-type thermocouples that are connected to terminals of respective phases of the circuit breaker, thereby making it possible to simultaneously measure the temperature of the terminal of each of the three phases (R, S, T) of the circuit breaker, and facilitating the connection and disconnection of the temperature sensing device; the terminal cover portion comprises a transparent plate configured such that, when the terminal cover portion is coupled to the housing, the transparent plate is installed to be spaced from the ends of the terminals by a predetermined distance, thereby making it possible to confirm by the naked eye whether the terminals and the temperature sensing device are connected or not, and improving the accuracy of detection through efficient blocking of inflow of alien substances from the outside; and power supply to the circuit breaker is controlled according to the current temperature (T) of the terminal of each of the three phases (R, S, T) of the circuit breaker or according to the rate of temperature change (ΔT) thereof, thereby accurately predicting and preventing any accident, which would otherwise occur due to heating of the terminals of the circuit breaker, in advance.

Description

Smart temperature measuring instrument

The present invention relates to a smart temperature measuring device, and in detail, it is possible to measure the temperature of the circuit breaker terminal through a simple operation and at the same time adjust the reference temperature of each terminal, when the measured temperature (T) is higher than the reference temperature (TH1) In addition, when the temperature change rate (△ T) is more than the reference change rate (TH2), it is a smart temperature measuring device that can prevent the accident due to overheating by expressing it to the outside while cutting off the power supply of the breaker.

In general, the breaker is installed to open and close the circuit between the power supply and the system to cut off the circuit from abnormal conditions such as overload and short circuit to maintain safety by supplying stable power to the system and minimizing the impact of accidents on the system. Device.

These breakers typically form a terminal block and are connected to the power supply and grid via the terminal block.

However, the terminal block has a characteristic of generating heat by contact resistance when energizing. As a result, the terminal block increases the contact resistance due to poor connection of the power supply line, product defects, aging, etc., and frequently generates heat above a set value. Such overheating causes loosening of fixing means such as bolts. At the same time, it may cause a fire.

Accordingly, various studies have been conducted on the temperature measuring device that measures the temperature of the terminal block and detects when the measured temperature is higher than the set value and expresses it to the outside.

The power circuit breaker disclosed in Korean Patent Publication No. 10-2003-0025005 (name of the invention: a power circuit breaker having a temperature sensing cutoff function) detects the temperature of each of the supply lines and a first circuit breaker that cuts off the power when an overcurrent is detected. Including a second circuit breaker that cuts off the power in the event of an abnormal temperature can prevent the damage caused by overheating.

However, the power circuit breaker is not capable of interlocking with the existing circuit breaker, but has to be manufactured and installed in a manner that replaces the existing circuit breaker.

In addition, the power circuit breaker does not describe a specific implementation and configuration of the temperature sensor for measuring the temperature, there is a structural limit that is operated with a fixed reference value for determining the temperature abnormality.

1 is a block diagram illustrating a temperature sensing device disclosed in Korean Patent No. 10-1249463 (name of the invention: temperature sensing of a terminal block).

The temperature sensing device (hereinafter, referred to as a prior art) 100 of FIG. 1 includes a temperature sensor 120 for detecting a temperature change of the terminal block 110 of the circuit breaker, and a signal detected through the temperature sensor 120. It is composed of a calculation processing unit 130 for calculating the temperature of the terminal block 110 on the basis, and a display unit 140 for displaying the temperature of the terminal block 110 to the user according to the result of the calculation processing unit 130.

The prior art 100 configured as described above senses the temperature of the R, S, T, and N phases of the terminal block 110 and simultaneously detects the temperature of the terminal block through the display unit 140 to display the terminal block from the outside. It has the advantage that the temperature of 110 can be easily recognized.

However, since the prior art 100 merely performs a function of expressing the temperature measured by the temperature sensing unit 120 to the outside through the display unit 140, the external manager does not view the display unit 140 even when a temperature abnormality occurs. Failure to do so has structural limitations that prevent rapid response. For example, the prior art 100 does not automatically cut off the circuit breaker when the measured temperature of the R-phase terminal is higher than the reference temperature, but simply displays the measured temperature of the R phase through the display unit, so that the external manager directly cuts off the power of the breaker. The breaker will operate overheated before

In addition, the prior art 100 has a problem that the efficiency of operation is lowered because the reference temperature is operated in a fixed state.

In general, overheating of the breaker terminals can be caused by various causes such as crimping and binding of the wires, the state of the power line, and the switching operation state of the breaker circuit. The main cause of this problem is the loosening of the screw. At this time, when the binding of the screw for crimping the wire and the terminal is released, the connection area of the wire and the terminal is reduced, the electrical resistance increases and heat is generated.

In addition, such screw fastening is gradually released by external vibration or minute heat and at the same time, when the screw fastening is released above the threshold, the heat generation is rapidly increased. Accordingly, even if the temperature of the breaker is regularly monitored, a fire due to heat Occurs abruptly from the point where the screw is released above the threshold.

However, since the prior art 100 does not take into account the characteristics of the terminal block in which heat is rapidly generated, the current temperature of the terminal block is less than the existing temperature, but when the temperature change is suddenly made, the risk of overheating may not be detected. Has structural limitations.

The present invention is to solve this problem, the problem of the present invention is to measure the temperature T for the terminals of each phase (R, S, T) of the circuit breaker through the first, second, third display unit Simultaneously with the display, it is possible to control the first set value (TH1, Threshold1), which is the reference temperature for each phase, by operating the selection button and the increase / decrease button. It is to.

In addition, another problem of the present invention is to configure the temperature sensor as a K-type thermocouple and simultaneously connect the '+' and '-' metals of each of the K-type thermocouples connected to the terminals of each phase of the circuit breaker. By including a terminal unit for making it possible to simultaneously measure the temperature of each of the three phase (R, S, T) terminals of the circuit breaker, and to provide a smart temperature measuring device that can be easily connected and disconnected the temperature sensor.

In addition, another problem of the present invention is that the terminal cover portion includes a transparent plate, but when the terminal cover portion is coupled to the housing, the transparent plate is configured to be installed at a predetermined distance apart from the ends of the terminals to visually check whether the terminal and the temperature sensor are connected. It is not only possible to provide a smart temperature measuring device that can effectively block the inflow of foreign substances from the outside to increase the accuracy of detection.

In addition, another object of the present invention is to measure the measured temperature T of the terminal of each phase (R, S, T) of the circuit breaker detected by the K-type thermocouple to correspond to the first set value TH1. ) And the first comparison and determination module which determines that the breaker is required to be cut off when the measured temperature T is equal to or greater than the first set value TH1, and the terminals of each phase (R, S, T) of the breaker. After detecting the temperature change rate ΔT separately, the detected breaker when the temperature change rate ΔT is equal to or greater than the second set value TH1 by comparing each detected temperature change rate ΔT with a corresponding second set value TH2. Power supply of the circuit breaker according to the current temperature (T) or the rate of change of temperature (△ T) of each of the three phase (R, S, T) terminals of the circuit breaker The present invention relates to a smart temperature measuring device that can accurately predict and prevent accidents due to heat generation in advance.

Solution to Problem The present invention for solving the above problems is a temperature measuring device for measuring the temperature of the terminals of the circuit breaker: temperature sensing means connected to each terminal of the circuit breaker; Analyzing the detection signals detected by the temperature sensing means to detect the measurement temperature (T) of each of the terminals of the circuit breaker and the temperature change rate (ΔT) for a predetermined period, and then the detected measurement temperatures (T). Each of the detected temperature change rates ΔT to each of the first set values TH1 and Threshold1, which are reference temperatures of each terminal of the circuit breaker, and a second set value TH2, which is a reference temperature change rate of each terminal of the circuit breaker, respectively. Compared to Threshold2, and when the measured temperature T of any one of the terminals of the circuit breaker is equal to or greater than the first set value TH1 or the rate of change of temperature ΔT is equal to or greater than the second set value TH2, It is determined that the power is required to include a control unit for displaying an alarm.

In the present invention, the control unit includes a temperature detection module for detecting the measurement temperature (T) of each terminal of the circuit breaker by analyzing the detection signal input from the temperature sensing means; Each of the measured temperatures T detected by the temperature detection module is compared with a corresponding first set value TH1 among the first set values TH1 and Threshold1 which are reference temperatures of respective terminals of the breaker. A first comparison and determination module which determines that one of the terminals of the circuit breaker needs to be cut off when the measured temperature T is equal to or greater than the first set value TH1; After detecting the temperature change rates (ΔT) of each terminal of the circuit breaker for a predetermined period through the measurement temperature (T) detected by the temperature detection module, each detected temperature change rate (ΔT) Compared to the corresponding second set value TH2 among the second set values TH2 and Threshold2 which are the reference temperature change rates of the terminals, one of the terminals of the circuit breaker has a temperature change rate? T A second comparison and determination module for determining that the circuit breaker needs to be shut down when TH2) or more; Preferably, the first comparison and determination module or the second comparison and determination module includes an alarm display module that is driven when it is determined that the power supply of the circuit breaker is necessary to express an alarm.

In the present invention, the temperature measuring device is connected to the '+', '-' line of the A relay (A relay) of the circuit breaker to switch the '+', '-' line of the A relay (A relay), It is connected to the '+', '-' lines of the B relay of the circuit breaker to switch the '+', '-' lines of the B relay (B relay), and the alarm display module compares the first When it is determined by the determination module or the second comparison and determination module that the breaker needs to be cut off, it is preferable to open the switching of the relay A and close the switching of the relay B.

In addition, the temperature sensing means in the present invention is a K-type thermocouple (K type thermocouple), the K- type thermocouple is a compression terminal is installed at one end of the '+' metal and '-' metal and the other ends are mutually contacted The temperature measuring device may further include a terminal part including terminals electrically connected to the crimp terminal of the K-type thermocouple.

In addition, in the present invention, the temperature measuring device is formed of a housing having one side opened, the control unit is installed therein, and a housing in which a plurality of terminal insertion holes penetrating both sides are formed in a bottom wall which is a wall facing the opening; A terminal unit including a substrate and terminals provided on one surface of the substrate; It includes a cover which is provided in the opening of the housing, wherein the terminal portion is preferably installed inside the housing so that the terminals protrude out of the housing through each of the terminal insertion holes of the housing.

In the present invention, the housing is formed in the center of the width of the outer surface of the bottom wall protruding from the outer surface extending in the longitudinal direction, the temperature measuring instrument further comprises a terminal cover portion, the terminal cover portion has a plate material having a length A horizontal plate having a shape, a vertical plate formed of a plate having an area, and coupled to both ends of the horizontal plate, and transparent plates having both ends coupled between the vertical plates based on the horizontal plate, and the terminal The cover part may be coupled to the housing by bolting while the horizontal plate is in contact with the protrusion of the housing, and the transparent plate may be installed to be spaced apart from the ends of the terminals of the terminal part.

According to the present invention having the above-mentioned problems and solutions, the selection button at the same time displaying the measured temperature (T) for the terminals of each phase (R, S, T) of the circuit breaker through the first, second, third display parts And the operation of the increase and decrease button is configured to adjust the first set value (TH1, Threshold1), which is the reference temperature of each phase, the operation is simple and can greatly increase the ease of use.

In addition, according to the present invention, the temperature sensor is composed of a K-type thermocouple, and at the same time, a terminal portion for connecting the '+' and '-' metals of each of the K-type thermocouples connected to the terminals of each phase of the circuit breaker. By including the temperature of each of the three phase (R, S, T) terminals of the circuit breaker can be measured simultaneously, as well as the connection and disconnection of the temperature sensor can be made easily.

In addition, according to the present invention, the terminal cover portion includes a transparent plate, but when the terminal cover portion is coupled to the housing, the transparent plate is configured to be spaced a predetermined distance apart from the ends of the terminals so that the connection between the terminal and the temperature sensor can be visually confirmed as well as external. The accuracy of detection can be improved by effectively blocking the inflow of foreign substances from.

In addition, according to the present invention by controlling the power supply of the circuit breaker according to the current temperature (T) or the temperature change rate (△ T) of each of the three phase (R, S, T) terminals of the circuit breaker to prevent accidents due to heat generation of the circuit breaker terminals Can be accurately predicted and prevented.

Figure 2 is a front view showing a smart temperature meter which is an embodiment of the present invention.

3 is a side view of FIG. 2.

4 is an exploded perspective view of FIG. 2.

5 is a perspective view illustrating the terminal unit of FIG. 4.

6 is a side view of FIG. 5.

FIG. 7 is a block diagram illustrating a function of terminals of FIG. 5.

8 is a perspective view illustrating a Y-type terminal coupled to the terminal of FIG.

9 is a perspective view illustrating the housing of FIG. 4.

10 is a perspective view of FIG. 9 viewed from another angle.

11 is an exploded perspective view illustrating the terminal cover of FIG. 4.

12 is a perspective view illustrating the bracket of FIG. 11.

13 is an exemplary view for explaining an assembly process of the terminal unit, the housing and the terminal cover of the present invention.

14 is a perspective view illustrating an exploded process of FIG. 13.

15 is a block diagram showing a control unit of the present invention.

FIG. 16 is a block diagram illustrating a first comparison and determination module of FIG. 15.

17 is a block diagram illustrating a second comparison and determination module of FIG. 15.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention.

Figure 2 is a front view showing a smart temperature meter which is an embodiment of the present invention, Figure 3 is a side view of Figure 2, Figure 4 is an exploded perspective view of FIG.

Smart temperature measuring device 1 according to an embodiment of the present invention measures the temperature of a terminal block of a conventional circuit breaker, particularly a three-phase (R, S, T) terminal block, and then displays the measured temperature to the outside and simultaneously displays the measured temperature. If it is determined that the breaker's power supply is required to be analyzed, the device is designed to prevent an accident caused by the heat generation of the breaker by blocking the breaker.

The smart temperature measuring device 1 includes a circuit board 2, a housing 3, a flexible numeric display (FND) 4, a cover 5, a terminal portion 7, and a terminal cover as shown in FIGS. It consists of a part (9).

The circuit board 2 is provided with an electric circuit and an electric element for driving the present invention.

Although not shown in the drawing, the circuit board 2 is provided with a control unit 10 of FIG. 15 for controlling for controlling the operation of the present invention.

In addition, the FND (Flexible Numeric Display) 4 is provided in the circuit board 2, and the FND 4 is driven under the control of the controller 10 of FIG.

FND (Flexible Numeric Display) 4 is provided with a plurality of light emitting diode elements for displaying a number, and displays the number by turning on and off the light emitting diode elements in accordance with the drive signal input from the control unit 10.

In addition, the FND 4 includes a first display unit 41 in which the measured temperature or the reference temperature for the R-phase terminal of the circuit breaker is displayed numerically, and a second display unit in which the measured temperature or the reference temperature for the S-phase terminal is displayed numerically ( 43) and the third display unit 45 in which the measured temperature or the reference temperature for the T-phase terminal is numerically displayed. That is, the FND 4 has the first, second, and

third display parts

41, 2, 3, 3, 4 and 4 when the circuit breaker to be detected is a three-phase four-wire type. Displayed through (43), (45), if the circuit breaker to be detected is a single-phase two-wire type, the measurement temperature or the reference temperature for the terminal of the single phase is displayed through the first display unit (41).

On the other hand, the circuit board 2 is provided with a selection button 25 for setting the display mode and the setting mode. At this time, the display mode is a mode in which the number displayed on each of the first, second, and

third display units

41, 43, and 45 of the FND 4 is the currently measured temperature, and the setting mode is FND. This is the mode when the numbers displayed on the first, second, and

third display portions

41, 43, and 45 of (4) are the reference temperature. At this time, the first set value (TH1, Threshold1) that is the reference temperature is defined as the minimum temperature value of the terminal that can determine that the power supply of the breaker should be cut off.

That is, the manager can select the exhibition mode or the setting mode through the selection button 25, and when the exhibition mode is selected, the R, S, T phases of the circuit breaker are displayed through the numbers displayed on the

display parts

41, 43, and 45. The current temperature of each of the terminals can be viewed, and when the setting mode is selected, the first set values TH1 of the terminals can be viewed through the numbers displayed on the

display parts

41, 43, and 45.

In addition, the circuit board 2 increases or decreases the first setting values TH1 and Threshold1 of the terminals of the R, S, and T phases when driven in the setting mode according to the selection of the selection button 25 ('+', '-'). Increasing / decreasing buttons (26) and (26 ') are installed. At this time, the controller 10 increases or decreases the first set value TH of the corresponding terminal according to the input of the selection button 25 when the setting mode is driven, and displays the first set value which is increased or decreased.

In addition, the circuit board 2 is provided with LEDs indicating a power state, an Ethernet connection state, a Wi-Fi (Wireless Fidelity) connection state, an alarm state, a data communication state, a Bluetooth connection state, and the like.

As such, in the smart temperature measuring device 1 according to the embodiment of the present invention, the FND 4 includes first, second, and

third display parts

41, 43, and 45, respectively. Standard that can determine whether the breaker is powered by simple operation of the selection button 25 and the increase / decrease buttons 26, 26 'while displaying the measurement temperature or the reference temperature (first set value, TH1). Each of the first set values TH1, which are temperatures, may be easily set.

5 is a perspective view illustrating the terminal of FIG. 4, FIG. 6 is a side view of FIG. 5, FIG. 7 is a block diagram illustrating the functions of the terminals of FIG. 5, and FIG. 8 is a Y-type coupled to the terminal of FIG. 5. A perspective view showing a terminal.

5 to 7 is a device for providing a terminal for interfacing with a temperature sensor for measuring the temperature of the three-phase (R, S, T) terminal of the circuit breaker to be detected. At this time, in the present invention, the temperature sensor is applied as a K-type thermocouple, and thus, the terminal 73 for electrically coupling the '+' and '-' metals of the K-type thermocouple. Provide them.

In addition, the terminal portion 7 includes a substrate 71 and terminals 73 provided on one surface of the substrate 71 by a fastening bolt 731. At this time, the terminal 73 is composed of a tightening bolt 731, a washer 733, a fixing part 735, the tightening bolt 731 and the washer 733 is a '+' of the K-type thermocouple (K type thermocouple) The electrical coupling to the metal or the '-' metal makes it possible to measure the temperature of the terminals of the external breaker. Since the configuration of the terminal 73 is a technique commonly used in switchboards, circuit breakers, and the like, detailed descriptions thereof will be omitted.

In addition, the Y-type terminal 720 of FIG. 8 is compressed and electrically coupled to each of the terminals 73 of the terminal unit 7. In this case, the K-type thermocouple is made of an insulated cable having a Y-type terminal 720 which is a crimp terminal installed at both ends. Since the temperature sensing method of the K-type thermocouple is a commonly used technique, a detailed description thereof will be omitted. do.

In addition, the terminal portion 7 is provided with three pairs of terminals 73 on both sides of the substrate 71, as shown in FIG.

At this time, when viewed from the drawing, the pair of terminals 73-1 on the upper left side are electrically connected to the '+' and '−' lines of the power supply line, and the pair of terminals 73-2 on the left middle are the sensing targets. The '+' and '-' wires of the A relay of the breaker are electrically connected, and the pair of terminals 73-3 in the lower left is connected to the '+' and '' of the B relay of the breaker. The − 'line is electrically connected. That is, according to the present invention, when the temperature of the circuit breaker is greater than or equal to the first set value or the temperature change rate of the circuit breaker is greater than or equal to the second set value, the contact point A of the circuit breaker is opened by the terminals 73-2, and the terminals 73-3 The contact B of the breaker is closed by the power supply of the breaker.

In addition, a pair of terminals 73-4 on the upper right side are electrically connected to the '+' and '-' lines of the K-type thermocouple to be used for temperature measurement of the R phase terminal of the circuit breaker. 73-5 are used to measure the temperature of the S phase terminal of the circuit breaker, and a pair of terminals 73-5 at the lower right is used to measure the temperature of the S phase terminal of the circuit breaker.

9 is a perspective view illustrating the housing of FIG. 4, and FIG. 10 is a perspective view of FIG. 9 viewed from another angle.

The housing 3 of FIGS. 9 and 10 is formed of a hexahedron having an opening in the front thereof and having a receiving space therein, the cover 5 is coupled to the opening, and the substrate 2 and the terminal portion 7 are installed in the inner space. .

In addition, the housing 3 is formed with a protrusion 31 protruding outward from the outer surface on the outer surface of the rear wall (hereinafter referred to as a bottom wall) 30 opposite to the opening, and the protrusion 31 has the following FIGS. 11 to 12 The terminal cover portion 9 is provided. At this time, the protrusion 31 is formed in the center of the bottom wall 30 in the width direction is formed to extend in the longitudinal direction.

In addition, the housing 3 is provided with cable connectors 35 into which one side 34 is inserted a LAN cable or a data cable.

In addition, the housing 3 is formed with terminal insertion holes 33 through which both terminals 73 of FIG. 5 are inserted, respectively, through the bottom wall 30 except the protrusion 31. At this time, the terminal portion 7 is installed inside the housing 3 so that the terminal 73 faces the bottom wall 30 of the housing 3, and during installation, the terminals 73 are inserted into the terminal insertion hole 33 of the housing 3. Pass through each of them to protrude to the outside.

In addition, the housing 3 has a separation plate 37 installed vertically on the outer surface of the rear wall 30 between the adjacent terminal insertion holes 33, so that the assembly space is separated when the terminal 73 and the terminal 720 are assembled. 37 is secured by the terminal 73 and the terminal 720 is easily connected.

11 is an exploded perspective view illustrating the terminal cover of FIG. 4, and FIG. 12 is a perspective view illustrating the bracket of FIG. 11.

The terminal cover part 9 of FIGS. 11 and 12 consists of the bracket 91 and the transparent plate 93.

The bracket 91 may include a horizontal plate 911 having a length and a

vertical plate

913 and 913 ′ formed of a plate having an area and vertically connected to both ends of the horizontal plate 911. It consists of extension plates 914, 914 'vertically connected outwardly to the ends of each of the direct plates 913, 913'.

The horizontal plate 911 is formed of a plate member having a length, and one surface thereof is welded to the outer surface of the protrusion 31 of the housing 3. At this time, the horizontal plate 911 is formed of the same length as the housing (3).

In addition, the horizontal plate 911 is coupled to the terminal cover 9 to the housing 3 by being bolted in a state in which one surface is welded to the protrusion 31 of the housing (3).

The vertical plates 913 and 913 'are formed of a plate having an area, and the center of one end portion is vertically connected to both ends of the horizontal plate 911. That is, the bracket 91 forms a '' shape when the horizontal plate 911, the

vertical plate

913, and 913 ′ are assembled.

In addition, the vertical plates 913 and 913 'are formed with the same area as the sidewalls of the housing 3 so that the opposite surfaces are assembled to the sidewalls of the housing 3 during assembly.

In addition, the transparent plates 93 are installed on both sides of the vertical plates 913 and 913 'based on the horizontal plate 911. In this case, the transparent plates 93 are preferably formed at the same height as the horizontal plate 911.

In addition, the transparent plates 93 are installed to be spaced apart from the end of the terminal 73 projecting outward from the housing 3 when assembled to the housing 3.

In addition, the one side vertical plate 914 'is formed with a through hole 915 penetrating both sides, the through hole 915 is connected to the cable connector 35 of the housing 3 during assembly, so that the external LAN cable or data cable Is inserted.

FIG. 13 is an exemplary view for explaining an assembly process of the terminal unit, the housing, and the terminal cover unit of the present invention, and FIG. 14 is a perspective view illustrating an exploded process of FIG. 13.

As shown in FIG. 13, the terminal portion 7 is first installed inside the housing 3 so that the terminals 73 face the bottom wall 30 of the housing 3, and the terminals 73 of the terminal portion 7 The terminal insertion holes 33 of the bottom wall 30 of the housing 3 are respectively protruded to protrude to the outside. At this time, the terminals 73 protrude to the outside of the housing 3 to be disposed inside the protruding surface 31 of the housing 3.

In this state, the horizontal plate 911 of the terminal cover portion 9 is welded to the protruding surface 31 of the housing 3, and then the bolts are fastened to couple the terminal cover portion 9 to the housing 3. At this time, the horizontal plate 911 of the terminal cover portion 9 is perpendicular to the protruding surface 31 of the

housing

3, 913, 913 'are to be treated to both sides of the housing.

In addition, when the housing 3 and the terminal cover portion 9 are coupled, the transparent plates 93 of the terminal cover portion 9 are spaced apart from the end portions of the terminal 73 protruding to the outside of the housing 3 at a predetermined interval. do.

In addition, the transparent plate 93 is installed at a predetermined distance from the terminal 73 protruding outward through the housing 3 to visually check the connection state of each terminal 73 and the Y-type terminal 720. At the same time, it is possible to increase the accuracy of the temperature detection by blocking the path in which foreign matter enters the connection portion of the terminal 73 and the Y-type terminal 720.

15 is a block diagram showing a control unit of the present invention.

As shown in FIG. 15, the controller 10 of the present invention includes a control module 11, a memory 12, a communication interface module 13, a temperature detection module 14, a display module 15, and a reference temperature setting. Module 16, a first comparison and determination module 17, a second comparison and determination module 18, and an alarm display module 19.

The control module 11 is an operating system (OS) of the control unit 10, the control target 12, (13), (14), (15), (16), (17), (18), (19 Manage and control).

In addition, the control module 11 periodically collects the measurement temperature data by the temperature detection module 14 and the first set value TH1 data currently set by the reference temperature setting module 16 and then the communication interface module. Control 13 and transmit them to a management server (not shown).

In addition, when the measurement temperature is detected by the temperature detection module 14, the control module 11 stores the detected measurement temperature data in the memory 12 and simultaneously displays the display module 15, the first comparison and determination module 17, Input to the second comparison and determination module 18.

In addition, the control module 11 stores the input first set value TH1 in the memory 12 when the first set value TH1 is input by the reference temperature setting module 16, and the first comparison and determination module. (17) The first set value TH1 is input during driving.

In addition, the control module 11 causes the measurement temperature T to be displayed on the FND unit 4 by the display module 15 when the display module 15 is driven in the exhibition mode as described above with reference to FIG. 2. When driven in the setting mode through the selection button 25, the display module 15 causes the first set value TH1 to be displayed on the FND unit 4.

The memory 12 stores the first set value TH1 set by the reference temperature setting module 16 and the preset second set value TH2. At this time, the first set value TH1 is defined as the minimum temperature of the terminal that can determine that the power supply of the breaker should be cut off, and the second set value TH2 is a terminal that can determine that the power supply of the breaker should be cut off. It is defined as the minimum rate of change of temperature.

In addition, the memory 12 temporarily stores the measured temperature data detected by the temperature detection module 14.

In addition, when the alarm is expressed by the alarm expression module 19, the memory 12 stores the log data of the alarm data.

The communication interface module 13 supports data communication with external equipment, and in detail, measured temperature data and first set value data collected by a management server (not shown) periodically under the control of the control module 11. And alarm log data.

The temperature detection module 14 analyzes and processes the voltage detected through the terminal portion 7 by the K-type thermocouple 950, and thus the three-phase (R, S, T) terminals 910, (of the circuit breaker 900) ( 920 and 930, respectively, the measurement temperature T is detected. In this case, the K-type thermocouple 950 is provided with Y-type terminals 720 at one end of the '+' and '-' metals, and the other ends thereof are connected to one terminal of the circuit breaker 900, and the Y-type terminal. 720 is connected to each of the '+' and '-' terminals of the terminal portion 7.

In addition, the measurement temperature T detected by the temperature detection module 14 is stored in the memory 12 under the control of the control module 11 and at the same time the display module 15, the first comparison and determination module 17, It is input to the second comparison and determination module 18.

The display module 15 controls the first display unit 41, the second display unit 43, and the third display unit 45 of the FND unit 4 to determine the number displayed through each display unit.

In addition, the display module 15 displays the measurement temperature T detected by the temperature detection module 14 under the control of the control module 11 when the display mode is driven. In this case, the display module 15 measures the measured temperature T of the R-phase terminal 910 of the circuit breaker 900 as the first display unit 41, and the measured temperature T of the S-phase terminal 920 is zero. 2, the display unit 43 displays the measured temperature T of the T-phase terminal 930 through the third display unit 45.

In addition, the display module 15 is a terminal 910, 920 of the circuit breaker 900 which is preset by the control of the control module 11 or set by the reference temperature setting module 16 when driving the 'setting mode'. ), The first set value TH1, which is a reference temperature of each of the (930), is displayed.

The reference temperature setting module 16 is driven when the 'setting mode' is selected by the selection button 25 of FIG. 2 described above, and

terminals

910 and 920 of the circuit breaker 900 which are set at the time of initial driving. ), The first set values TH1 of the respective 930 are input to the display module 15 to display the first set values 41, 43, 45 of the FND unit 4. Let TH1 be displayed.

In addition, the reference temperature setting module 16 includes an input module (not shown) which receives data through the increase / decrease buttons 26 and 26 'of FIG. 2, according to the increase / decrease data input through the input module. 1 Set the set values (TH1).

In addition, the reference temperature setting module 16 stores the set first set values TH1 in the memory 12.

As shown in FIG. 16, the first comparison and determination module 17 stores the three-phase measured temperature T data detected by the temperature detection module 14 in the first set values TH1 stored in the memory 12. When the measured temperature T is equal to or greater than the first set value TH1 by the first comparison module 171 and the first comparison module 171 to compare with each other, it is necessary to shut off the power supply of the circuit breaker 900. The first determination module 173 determines.

In addition, if the measured temperature T is less than the first set value TH1 by the first comparison module 171, the first determination module 173 does not generate an overheating terminal of the circuit breaker 900, and thus the circuit breaker 900. We believe it is safe to continue supplying power.

In addition, when it is determined that the power supply of the breaker 900 is required to be cut off by the first comparison and determination module 18, the control module 11 inputs control data to the alarm display module 19 to display the alarm display module 19. ).

As shown in FIG. 17, the second comparison and determination module 18 analyzes the three-phase measurement temperature (T) data for a predetermined period and calculates the temperature change rate (ΔT) of the three-phase terminal for a predetermined period. The second comparison module 183 compares the temperature change rate ΔT of the three-phase terminal calculated by the calculation module 181 and the temperature change rate calculation module 181 to each of the preset second set values TH2. And a second determination that the second comparison module 183 determines that the power supply of the circuit breaker 900 needs to be cut off when the temperature change rate ΔT of each three-phase terminal is equal to or greater than the second set value TH2. Module 185.

In addition, if the temperature change rate ΔT of each three-phase terminal is less than the preset second set value TH2 by the comparison module 183, the second determination module 185 may be configured to overheat the terminal of the circuit breaker 900. Since it does not occur, it is determined that the power supply of the circuit breaker 900 may be continued.

The alarm display module 19 is driven when it is determined by the first comparison and determination module 17 or the second comparison and determination module 18 that the power supply of the breaker 900 should be cut off, and the following operation is performed. do.

1) As described above with reference to FIG. 7, the switch A of the terminals 73-2 is controlled to open the A contact of the breaker, and the B contact of the breaker is closed by the terminals 73-3 so as to close the power supply of the breaker. To block.

2) Make red alarm light through lighting lamp and LED lamp.

3) Control communication interface module to transmit alarm data that alarm has occurred to management server.

As such, the present invention compares the measured temperature T of each three-phase terminal of the circuit breaker 900 to the first set value TH1 which is a reference temperature for each phase, and thus the measured temperature T is equal to the first set value TH1. ) Is not only cut off the power supply of the circuit breaker 900, but also the temperature change rate (ΔT) by comparing the temperature change rate (ΔT) of each three-phase terminal to the second set value (TH2) that is the reference temperature change rate for each phase Is configured to cut off the power supply of the circuit breaker 900 when the value is equal to or greater than the second set value TH2, so that an accident such as a fire due to heat generation of the terminal of the circuit breaker 900 can be prevented in advance.

Claims

In the thermometer for measuring the temperature of the terminals of the circuit breaker:

Temperature sensing means connected to each terminal of the circuit breaker;

Analyzing the detection signals detected by the temperature sensing means to detect the measurement temperature (T) of each of the terminals of the circuit breaker and the temperature change rate (ΔT) for a predetermined period, and then the detected measurement temperatures (T). Each of the detected temperature change rates ΔT to each of the first set values TH1 and Threshold1, which are reference temperatures of each terminal of the circuit breaker, and a second set value TH2, which is a reference temperature change rate of each terminal of the circuit breaker, respectively. Compared to Threshold2, and when the measured temperature T of any one of the terminals of the circuit breaker is equal to or greater than the first set value TH1 or the rate of change of temperature ΔT is equal to or greater than the second set value TH2, And a controller configured to display an alarm by determining that power supply is necessary.
The method of claim 1, wherein the control unit

A temperature detection module for analyzing measurement signals input from the temperature detection means to detect measurement temperatures T of respective terminals of the circuit breaker;

Each of the measured temperatures T detected by the temperature detection module is compared with a corresponding first set value TH1 among the first set values TH1 and Threshold1 which are reference temperatures of respective terminals of the breaker. A first comparison and determination module which determines that one of the terminals of the circuit breaker needs to be cut off when the measured temperature T is equal to or greater than the first set value TH1;

After detecting the temperature change rates (ΔT) of each terminal of the circuit breaker for a predetermined period through the measurement temperature (T) detected by the temperature detection module, each detected temperature change rate (ΔT) Compared to the corresponding second set value TH2 among the second set values TH2 and Threshold2 which are the reference temperature change rates of the terminals, one of the terminals of the circuit breaker has a temperature change rate? T A second comparison and determination module for determining that the circuit breaker needs to be shut down when TH2) or more;

And an alarm display module that is driven when the first comparison and determination module or the second comparison and determination module determines that the power supply of the circuit breaker is necessary.
The method of claim 2, wherein the temperature measuring device

It is connected to the '+' and '-' lines of the A relay of the circuit breaker to switch the '+' and '-' lines of the A relay, and the B relay of the breaker. Is connected to the '+' and '-' lines of the relay to switch the '+' and '-' lines of the B relay,

The alarm display module opens the switching of the relay A and closes the switching of the relay B when the first comparison and determination module or the second comparison and determination module determines that the breaker needs to be shut down. Temperature measuring device characterized in that.
The thermocouple device of claim 3, wherein the temperature sensing means is a K-type thermocouple, and the K-type thermocouple is provided with a crimp terminal at one end of the '+' metal and the '-' metal, and the other ends thereof. Contact each other,

The temperature measuring device further comprises a terminal portion consisting of terminals electrically connected to the crimp terminal of the K-type thermocouple.
The method of claim 4, wherein the temperature measuring device

A housing in which one side is formed as an open housing and the control unit is installed therein, and a plurality of terminal insertion holes are formed at both sides of the bottom wall, which is a wall facing the opening;

A terminal unit including a substrate and terminals provided on one surface of the substrate;

A cover installed in the opening of the housing;

And the terminal unit is installed inside the housing such that the terminals protrude out of the housing through each of the terminal insertion holes of the housing.
The method of claim 5, wherein the housing is formed in the center of the width of the outer surface of the bottom wall protruding portion extending from the outer surface in the longitudinal direction,

The temperature measuring instrument further includes a terminal cover portion,

The terminal cover portion

A horizontal plate having a length having a length, a vertical plate formed of a plate having an area, and coupled to both ends of the horizontal plate, and transparent plates having both ends coupled to the vertical plates based on the horizontal plate. and,

The terminal cover part is coupled to the housing by bolts in a state in which the horizontal plate is in contact with the protrusion of the housing, when the transparent plate is installed to be spaced apart from the ends of the terminals of the terminal portion .