KR20230136909A - Monitoring device and method for circuit breaker status of distribution panel - Google Patents

Abstract

The present invention relates to an apparatus and method for monitoring the status of circuit breakers in a distribution board, which detects a plurality of circuit breakers installed in the bus and branch lines of the distribution board, the status of the circuit breakers, and measures the voltage of the secondary bus or branch lines of the circuit breakers to determine whether the circuit is live. It may include a plurality of measuring instruments that check the status of the circuit breaker and whether it is live or not and determine that the circuit breaker is faulty if they are not the same, and a main measuring instrument that receives and displays whether the circuit breaker is abnormal from each of the plurality of measuring instruments. You can.

Description

{Monitoring device and method for circuit breaker status of distribution panel}

The present invention relates to an apparatus and method for monitoring the status of circuit breakers in a distribution board, and more specifically, to an apparatus and method for monitoring the status of circuit breakers using multi-line measuring instruments in a distribution board.

Generally, a distribution panel supplies power to loads by branching off branch lines from a busbar. The digital power meter used in the distribution board is a digital panel meter, which can also be installed in the distribution board. It measures the voltage and current of the power system and calculates and displays various electric quantities, including power and wattage.

Recently, as the importance of energy management has increased, the scope of power monitoring has changed from total load energy information management within the distribution panel to analytical energy management for each load within the distribution panel.

Accordingly, it became necessary not only to measure the electric quantity of the busbar inside the distribution board, but also to measure the electric quantity of each branch for the branch load of the branch line, and a digital power meter for the distribution board is used as a device to realize this.

The distribution board multi-line measuring instrument transmits various measured electrical quantities to the main measuring instrument through communication media. The main measuring instrument transmits the information collected from multiple distribution panel multi-line measuring instruments to the upper system, so that the user can physically It becomes possible to centrally monitor power for multiple distributed distribution boards.

Figure 1 is a configuration diagram of a conventional multi-line measuring instrument system for a distribution board.

Referring to FIG. 1, a conventional multi-line measuring instrument system for a distribution board includes a main breaker 110 installed in the busbar 100, a first measuring instrument 120 that measures the amount of electricity in the busbar at the rear end of the main breaker 110, and A plurality of branch circuit breakers 210 are installed on the branch line 200 branched from the bus bar 100 to block and control power supply to the load 300, and are located between the branch circuit breaker 210 and the load 300. , a plurality of second measuring devices 220 that measure the amount of electricity of the load 300 of the branch line 200, and a display unit that displays the amount of electricity measured through communication with the second measuring devices 220 and the first measuring device 120. It is configured to include a main measuring instrument 400 including.

In the above structure, when the main circuit breaker 110 and the branch circuit breaker 210 are closed, the load 300 can receive power through the bus bar 100 and the branch wire 200 branched from the bus bar 100.

While power is supplied to the load 300 through the branch line 200, the second meter 220 installed on each branch line 200 measures the amount of electricity supplied to the load 300, and transmits the measurement result to the communication line. It is transmitted to the main measuring instrument 400 through. In addition, the first meter 120 installed on the busbar 100 also measures the amount of electricity supplied to the loads 300 connected to each branch line 200 and transmits the results to the main meter 400.

The first measuring device 120 and the second measuring device 220 are directly connected to the secondary side, which is the load side of the main circuit breaker 110 and the branch circuit breaker 210 of the bus bar 100 and each branch line 200, respectively, and are connected to the bus bar 100. and measure the three-phase voltage applied to the branch line 200.

Although various methods can be used, it is common to measure three-phase current by passing three busbars of the bus bar 100 and branch line 200 through each of the three built-in CTs.

Using the measured three-phase voltage and three-phase current, various electric quantities, including power and wattage, are calculated.

The first measuring device 120 and the second measuring device 220 have a built-in MCU, and can perform AD conversion on a three-phase voltage signal and a three-phase current signal, then calculate and display the RMS value for each.

The electric quantities measured by the first measuring device 120 and the second measuring device 220 include voltage, current, frequency, active power, reactive power, active power, reactive power, and harmonic content.

The main measuring device 400 collects and displays the measurement results of the first measuring device 120 and the second measuring device 220.

In addition, although omitted in the drawing, the main measuring device 400 transmits the collected measurement results to the upper system through an external communication network, so that the upper system can check the status of a plurality of distribution boards from a remote location.

During this operation, if the branch circuit breaker 210 is cut off for various reasons, the power supplied to the load 300 is cut off.

Cutting off the power supplied to the load 300 may be achieved by blocking the main breaker 110.

At this time, the main circuit breaker 110 and the branch circuit breaker 210 include an operating handle indicating the current operating state. The operating handle serves to indicate whether the secondary side of the main circuit breaker 110 or the branch circuit breaker 210 is currently in a live or non-live state.

Specifically, when the operation handle is in the ON position, the load end of the branch circuit is in a live state, and when the operation handle is in the OFF position, it indicates that the load end of the branch circuit is in a non-live state.

When workers usually perform work such as maintenance on the load 300 side, they check the status of the operating handle of the branch circuit breaker 210 before performing the work.

That is, after confirming that the operating handle of the branch circuit breaker 210 is in the OFF position, work is performed on the branch wire 200 and the load 300 in a non-live state.

However, if the inside of the distribution panel box is very dark, it is difficult for the operator to intuitively check the status of the operating handles, and in some cases, confusion between the ON and OFF positions may occur.

In addition, when the main circuit breaker 110 or the branch circuit breaker 210 itself is in a live state with power supplied due to a failure, but the operation handle is positioned in the OFF position, there is a problem in causing an electrical safety accident.

The problem to be solved by the present invention in consideration of the above problems is to provide a device and method for monitoring the status of a circuit breaker in a distribution panel that can easily check whether the circuit breaker is live regardless of the operating handle of the circuit breaker.

More specifically, the present invention uses measurement information from a measuring instrument located on the secondary side of the circuit breaker to monitor and display the state of the circuit breaker's operating handle and other live wire conditions that may occur when the circuit breaker body, auxiliary contact, or alarm contact fails. The aim is to provide a device and method for monitoring the status of circuit breakers in a distribution board that can prevent the occurrence of safety accidents.

A device for monitoring the status of circuit breakers in a distribution board according to one aspect of the present invention to solve the above technical problem is to detect the status of a plurality of circuit breakers installed in the busbar and branch lines of the distribution board and the circuit breakers, and detect the status of the circuit breakers in the secondary busbar of the circuit breakers. Or, measure the voltage of the branch line to check whether the wire is live, check whether the state of the circuit breaker is the same as whether the wire is live, and if they are not the same, determine whether the circuit breaker is defective, and check whether the circuit breaker is defective from each of the plurality of meters. It may include a main instrument that receives and displays.

In an embodiment of the present invention, the measuring device can detect whether the circuit breaker is blocked by receiving an output signal from the auxiliary contact of the circuit breaker.

In an embodiment of the present invention, the measuring device can receive an output signal from the alarm contact point of the circuit breaker and output an alarm signal for blocking of the circuit breaker.

In an embodiment of the present invention, a server may be further included to remotely manage the breaker by receiving the breaker abnormality and voltage from the main measuring device.

In an embodiment of the present invention, the terminal may further include a terminal that receives and displays whether a circuit breaker in a specific distribution board is abnormal by requesting the server.

In addition, a method for monitoring the status of a circuit breaker in a distribution board according to another aspect of the present invention includes the steps of: a) detecting the status of the circuit breaker with a measuring device, b) detecting whether a bus or branch line is live by detecting the voltage of a bus or branch line with a measuring device, c) comparing the detection result of step a) with the detection result of step b) in the measuring device to determine whether there is a problem with the breaker; d) if there is a problem with the breaker as a result of the determination in step c), the main meter It may include the step of transmitting circuit breaker error information and displaying it on the main measuring instrument.

In an embodiment of the present invention, step a) may detect whether the circuit breaker is blocked by receiving an output signal from the auxiliary contact point of the circuit breaker, or detect whether the circuit breaker is blocked by receiving an output signal from an alarm contact point.

In an embodiment of the present invention, step c) determines that the breaker is in a blocked state as a result of the detection in step a) and the circuit breaker is in a live state as a result of the detection in step b), or determines that the circuit breaker is in a blocked state as a result of the detection in step a). If the circuit breaker is not blocked and the detection result in step b) above shows that the circuit breaker is in an inactive state, it can be determined that the circuit breaker is faulty.

In an embodiment of the present invention, the live wire state can be detected when voltage is detected on even one of the multiple phases.

In an embodiment of the present invention, after performing step d), the step of transmitting the breaker error information received from the main meter to a server may be further included.

In an embodiment of the present invention, the user terminal may request the server to receive and display breaker abnormality information of a specific distribution board.

The present invention connects the auxiliary contact and alarm contact of the breaker to the measuring instruments of the bus and branch lines, so that it is possible to check the status of the breaker and detect any abnormality in the breaker by comparing it with the amount of electricity measured at the installation location. It has the effect of being able to check in real time whether there are any abnormalities.

In addition, the results of detecting abnormalities in the circuit breaker are displayed on the display of the main measuring instrument so that workers can easily determine whether a specific measuring instrument is abnormal, thereby preventing electrical safety accidents from occurring during work.

In addition, through external communication of the main breaker, the status of each breaker and whether or not the circuit breaker is installed is live to the upper system, and workers can access the upper system through the terminal to check in real time, preventing electrical safety accidents during work. It has the effect of preventing its occurrence.

Figure 1 is a configuration diagram of a conventional multi-line measuring instrument system for a distribution board.
Figure 2 is a configuration diagram of a circuit breaker status monitoring device in a distribution board according to a preferred embodiment of the present invention.
Figure 3 is a block diagram of a measuring instrument applied to the present invention.
Figure 4 is a flowchart of a method for monitoring the status of a circuit breaker in a distribution board according to a preferred embodiment of the present invention.
Figure 5 is a configuration diagram of a circuit breaker status monitoring device in a distribution board according to another embodiment of the present invention.

In order to fully understand the configuration and effects of the present invention, preferred embodiments of the present invention will be described with reference to the attached drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms and various changes can be made. However, the description of this embodiment is provided to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the present invention of the scope of the invention. In the attached drawings, components are shown enlarged in size for convenience of explanation, and the proportions of each component may be exaggerated or reduced.

Terms such as 'first' and 'second' may be used to describe various components, but the components should not be limited by the above terms. The above terms may be used only for the purpose of distinguishing one component from another. For example, the 'first component' may be named 'the second component' without departing from the scope of the present invention, and similarly, the 'second component' may also be named 'the first component'. You can. Additionally, singular expressions include plural expressions, unless the context clearly dictates otherwise. Unless otherwise defined, terms used in the embodiments of the present invention may be interpreted as meanings commonly known to those skilled in the art.

Hereinafter, an apparatus and method for monitoring the status of a circuit breaker in a distribution board according to an embodiment of the present invention will be described in detail with reference to the drawings.

Figure 2 is a configuration diagram of a circuit breaker status monitoring device in a distribution board according to a preferred embodiment of the present invention.

Referring to FIG. 2, the circuit breaker status monitoring device of the distribution board according to a preferred embodiment of the present invention measures the amount of electricity in the bus bar at the main breaker 11 installed on the bus bar 10 and the secondary side, which is the load side of the main breaker 11. In addition, a first measuring device (12) for checking the status of the main breaker (11) by checking the status values of the auxiliary contact and alarm contact of the main breaker (11) and comparing the status value and the measured value, and the bus bar ( A plurality of branch circuit breakers (21) installed on the branch line (20) branched from 10) to block and control power supply to the load (30), and measuring the amount of electricity between the branch circuit breakers (21) and the load (30) In addition, a second measuring device (22) that checks the status values of the auxiliary contact and alarm contact of the branch circuit breaker (21) and checks the status of the branch circuit breaker (21) by comparing the status value and the measured value, and the second measuring device (22) and a main measuring device (40) that receives and displays the amount of electricity measured through communication with the first measuring device (12) and displays the status of the main circuit breaker (11) and the branch circuit breaker (21). do.

Hereinafter, the configuration and operation of the circuit breaker status monitoring device according to a preferred embodiment of the present invention configured as described above will be described in detail.

First, the configuration of the main circuit breaker 11 and the branch circuit breaker 21 may be the same, with the only difference being capacity. The circuit breaker 11 is intended to protect the load 30 from overcurrent, and includes a current detection unit and a blocking unit.

Typically, a circuit breaker includes an auxiliary contact and an alarm contact.

The Auxiliary Switch (AX) is a contact that outputs the ON or OFF status of the breaker, and the Alarm Switch (AL) is a contact that notifies the outside world when the breaker is blocked due to overload or short circuit.

That is, the main circuit breaker 11 and the branch circuit breaker 21 are capable of outputting the contact state and the blocking state.

The first meter 12, which is installed on the busbar 10, which is the secondary side of the main breaker 11 and measures the amount of electricity, is connected to the auxiliary contact point (AX) and the alarm contact point (AL) of the main breaker 11 through a communication line. It is possible to detect the state of the main breaker (11).

The on or off status of the main breaker (11) can be detected as a 0 or 1 signal (or vice versa) through the auxiliary contact (AX), and the blocking status of the alarm contact (AL) is also received as a 0 or 1 signal. can do.

Figure 3 is a block diagram of the first measuring instrument 12.

Referring to FIG. 3, the first measuring instrument 12 includes a control unit 13, a measuring unit 14, and a communication unit 15 for communication with the main measuring instrument 40, and the auxiliary contact point ( It may include a contact receiver 16 for receiving signals from AX) and alarm contact point (AL).

In addition, it may include a memory 17 that stores measurement results or calculation or operation data of the control unit 13.

The configuration of the above first measuring device 12 can be substantially applied equally to the second measuring device 22, and this configuration only explains the elements essential for the operation of the first measuring device 12 and the second measuring device 22. And various components can be added as needed.

In the present invention, the first measuring device 12 and the second measuring device 22 are described separately, but since their installation positions are divided into the bus line 10 or the branch line 20, they are described with different names and symbols, but in practice, It can be seen that the configuration is the same.

That is, the branch circuit breaker 21 also has an auxiliary contact point (AX) and an alarm contact point (AL), and the second measuring device 22 located on the secondary branch line 20 of the branch circuit breaker 21 also includes a contact receiver. The blocking state of the branch circuit breaker (21) can be detected through the auxiliary contact (AX) of the branch circuit breaker (21) and the blocking status through the alarm contact (AL).

In this way, the first measuring device 12 and the second measuring device 22 detect the status of the main circuit breaker 11 and the branch circuit breaker 21, respectively, and also detect the amount of electricity at each installation location.

Accordingly, the first measuring device 12 and the second measuring device 22 can check the consistency of the state of the main circuit breaker 11 and the branch circuit breaker 21 and the electric quantity detection result, respectively.

For example, the control unit of the second measuring device 22 detects through the auxiliary contact (AX) of the branch line breaker 21 that the branch line 20 is in a blocked state, and there is no amount of electricity detected in the branch line 20. In this case, it can be confirmed that the status of the branch circuit breaker 21 is normal.

On the other hand, if the result detected through the auxiliary contact (AX) of the branch line breaker (21) is that the branch line (20) is blocked, but there is an electric quantity measured through the measuring unit, it can be confirmed that there is an abnormality in the branch line breaker (21). You can.

In this way, the first meter 12 and the second meter 22 use the states of the main breaker 11 and the branch circuit breaker 21 and the live state of the bus bar 10 or the branch line 20 to connect the main breaker 11. You can check whether the branch circuit breaker (21) is abnormal.

The condition at this time can also be detected through the alarm contact (AL).

In the above example, it is shown and explained that the signals of both the auxiliary contact point (AX) and the alarm contact point (AL) are used, but the signals of the auxiliary contact point (AX) or the alarm contact point (Al) can be used as needed.

In this way, the first measuring device 12 and the second measuring device 22 detect the status of the circuit breaker and transmit it to the main measuring device 40 through the communication unit 15.

The main meter 40 displays the amount of electricity detected by the measuring units 14 of the first meter 12 and the second meter 22, and also displays the main breaker determined by the first meter 12 and the second meter 22. Status information of (11) and branch circuit breaker (21) can also be displayed on the display.

Therefore, the operator can easily and safely check whether there is a problem with a specific circuit breaker by checking the display of the main measuring instrument 40.

Figure 4 is a flow chart of a method for monitoring the status of a circuit breaker in a distribution board according to a preferred embodiment of the present invention.

Referring to FIG. 4, the method for monitoring the status of a circuit breaker in a distribution board according to a preferred embodiment of the present invention includes the steps of detecting the status of the circuit breaker through the auxiliary contact or alarm contact of the circuit breaker (S41), and detecting the amount of electricity at the installation location. (S42), if the state of the circuit breaker and the electric quantity detection result are the same, re-performing step S41 (S43), and if the determination result of step S43 is not the same, transmitting information about the circuit breaker to the main measuring instrument (S44) ), and a step (S45) of displaying information on the circuit breaker in which an error occurred in the main measuring instrument.

Through this process, abnormalities in circuit breakers installed on multiple branch lines and one bus can be checked in real time and displayed on the display of the main measuring instrument (40).

An example of the method for monitoring the status of a circuit breaker in a distribution board of the present invention will be described in more detail through the operation of the branch circuit breaker 21 and the second meter 22 as follows.

First, in step S41, the second measuring device 22 detects a signal from the auxiliary contact point (AX) or the alarm contact point (AL) of the branch circuit breaker 21. At this time, it is possible to check whether the branch circuit breaker (21) is in the ON or OFF state through the auxiliary contact point (AX), and whether it is blocked can be checked through the alarm contact point (AL).

The status at this time can be confirmed by detecting a signal of 0 or 1.

Next, in step S42, the second measuring device 22 detects the amount of electricity supplied to the load 30 of the branch line 20. Detection of the electric quantity is performed through the measuring unit of the second measuring device 22.

The measuring unit of the second measuring device 22 can detect the amount of electricity for each of the three phases of the branch line 20, and if the amount of electricity is detected in even one of the three detected phases, it can be determined that the line is in a live state.

Next, in step S43, the control unit of the second measuring device 22 compares the detection result in step S41 with the detection result in step S42 to confirm the identity of the states.

For example, if the branch line circuit breaker 21 is in a blocked state as a result of detection in step S41 and the state of the branch line 20 detected in step S42 is an inactive line, the states are determined to be the same.

Likewise, if the branch line circuit breaker 21 is not blocked as a result of detection in step S41, and the state of the branch line 20 detected in step S42 is a live wire, the states are determined to be the same.

In a different state, if the branch line breaker 21 is in a blocked state as a result of detection in step S41, but the state of the branch line 20 determined in step S42 is in a live state, it is determined that there is a problem with the branch line breaker 21.

In addition, as a result of detection in step S41, it is confirmed that the branch line breaker 21 is not in a blocked state, but if the branch line 20 is in an inactive state as a result of detection in step S42, it is determined that there is a problem with the branch line breaker 21. .

If the branch circuit breaker 21 is operating normally based on the above judgment, the process is re-performed from step S41 to monitor the status of the circuit breaker in real time.

If it is determined that there is an abnormality in the branch circuit breaker 21, information on the branch circuit breaker 21 and abnormal state information are transmitted to the main measuring device 40 through the communication unit as in step S44.

Next, as in step S45, the main measuring device 40 displays the received information on the faulty branch circuit breaker.

Through this process, workers can easily check information on faulty circuit breakers through the main measuring instrument 40, thereby preventing safety accidents.

In addition, so that workers can more easily check the status of a specific branch line 20 and the status of the circuit breaker, the status of the circuit breaker of the distribution board currently being worked on can be checked using the user terminal.

Figure 5 is a configuration diagram of a circuit breaker monitoring device in a distribution board according to another embodiment of the present invention.

Referring to FIG. 5, the circuit breaker monitoring device according to another embodiment of the present invention may further include a server 50, which is a higher level system, and a user terminal 60.

The server 50 is capable of communicating with the main meters 40 installed in distribution boards, and the first meter 12 and the second meter 12 allow the manager to remotely provide the status of the circuit breaker and the electricity quantity measurement results to the main meters 40. 2Enables the information of the measuring instruments 22 to be confirmed.

In addition, upon request from the user terminal 60, the breaker status and live wire status for a specific distribution board are transmitted.

The server 50 may be a typical computer, includes a display, a processing device, a storage device, a memory, and an input device, and can be connected through a wired or wireless communication network.

The terminal 60 can also be connected to a wired or wireless communication network and may be configured to include a display, a processing device, and a storage device that can display the status of a breaker in a specific distribution board to the user. The terminal 60 may be a smartphone, smart pad, PC, laptop, etc.

In this configuration, the main meter 40 installed in each of the plurality of switchboards transmits the status information of the circuit breaker described above and the electricity quantity information measured by the meters in real time or periodically to the server 50, and the server 50 transmits the received information. Information is stored and provided upon request from the terminal 60.

Accordingly, workers can easily check the live status of circuit breakers and branch lines of the distribution board to be maintained and repaired through the terminal 60, and thus can prevent safety accidents from occurring due to causes such as abnormal condition of the circuit breaker.

Although embodiments according to the present invention have been described above, they are merely illustrative, and those skilled in the art will understand that various modifications and equivalent scope of embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the following claims.

10: Busbar 11: Main breaker
12: First measuring instrument 13: Control unit
14: Measurement Department 15: Communication Department
16: Contact input 20: Branch line
21: Branch circuit breaker 22: Second measuring device
30:Load 40:Main instrument
50: Server 60: Terminal

Claims (6)

Multiple breakers installed on the bus and branch lines of the distribution board,
A plurality of measuring instruments that detect the status of the circuit breakers, measure the voltage of the bus or branch line on the secondary side of the circuit breakers to check whether the circuit is live, check whether the status of the circuit breaker is the same as the live circuit, and if they are not the same, determine that the circuit breaker is faulty. A circuit breaker status monitoring device in a distribution board containing a.
According to paragraph 1,
A circuit breaker status monitoring device in a distribution board further comprising a main meter that receives and displays whether a circuit breaker is abnormal and a voltage measurement result from each of the plurality of meters.
According to paragraph 1,
The instrument is,
A circuit breaker status monitoring device in a distribution board that receives an output signal from the auxiliary contact point of the circuit breaker and detects whether the circuit breaker is blocked.
According to paragraph 1,
The instrument is,
A circuit breaker status monitoring device in a distribution board that receives an output signal from the alarm contact point of the circuit breaker and outputs an alarm signal for the circuit breaker's blocking.
According to any one of claims 2 to 4,
A circuit breaker status monitoring device in a distribution panel further comprising a server that receives breaker abnormalities and voltage from the main meter to enable remote management.
According to clause 5,
A circuit breaker status monitoring device in a distribution board further comprising a terminal that receives and displays whether a breaker in a specific distribution board is abnormal from the server.