JP7228802B2 - Monitoring system, monitoring method, program, and distribution board - Google Patents

Description

The present disclosure relates to a monitoring system, a monitoring method, a program, and a distribution board. More specifically, the present disclosure relates to a distribution board monitoring system, a monitoring method, a program, and a distribution board housing circuit breakers.

Patent Literature 1 discloses a distribution board in which a main switch and a plurality of branch switches are accommodated as internal devices inside a cabinet. Each main switch and branch switch has a leakage protection function. When the earth leakage protection function of the main switch and branch switch detects an earth leakage, the contact is forcibly opened to protect the circuit.

JP 2017-107833 A

In the distribution board disclosed in Patent Document 1, in order to check whether the contact portions of a plurality of switches (a main switch and a plurality of branch switches) are open or closed, The position of the handle of each switch had to be confirmed one by one, which was inconvenient.

An object of the present disclosure is to provide a monitoring system, a monitoring method, a program, and a distribution board that can improve usability.

A monitoring system according to one aspect of the present disclosure includes a collection unit. The collection unit collects monitoring information regarding the usage status of monitored objects including a plurality of circuit breakers housed in a distribution board. The monitoring information includes breaking information related to breaking operations of the circuit breaker. The breaking information includes status information indicating whether or not the plurality of circuit breakers have broken. The monitoring information is stored in a ring buffer. At least one of the monitoring information for a predetermined period before the breaking operation of the circuit breaker is performed and the monitoring information for the circuit breaker that has performed the breaking operation is stored so as not to be overwritten.

A monitoring method according to an aspect of the present disclosure collects monitoring information regarding the usage status of monitored objects including a plurality of circuit breakers housed in a distribution board. The monitoring information includes breaking information related to breaking operations of the circuit breaker. The breaking information includes status information indicating whether or not the plurality of circuit breakers have broken. The monitoring information is stored in a ring buffer. At least one of the monitoring information for a predetermined period before the breaking operation of the circuit breaker is performed and the monitoring information for the circuit breaker that has performed the breaking operation is stored so as not to be overwritten.

A program according to one aspect of the present disclosure is a program for causing a computer system to execute the monitoring method.

A distribution board according to one aspect of the present disclosure includes the monitoring system and a distribution board cabinet that houses the collection unit.

According to the present disclosure, it is possible to provide a monitoring system, a monitoring method, a program, and a distribution board that can improve usability.

FIG. 1 is a block diagram of an overall system including a distribution board with a monitoring system according to one embodiment of the present disclosure. FIG. 2 is an explanatory view of the same distribution board as viewed from the front, with the lid and the cover removed. FIG. 3 is an explanatory view of the same distribution board as viewed from the front with the cover removed. FIG. 4 is an explanatory diagram of the same distribution board as viewed from the front. FIG. 5 is a flowchart for explaining the operation of the monitoring system;

The embodiment described below is but one of the various embodiments of the present disclosure. Embodiments of the present disclosure are not limited to the following embodiments, and may include other embodiments. In addition, the following embodiments can be modified in various ways according to design and the like without departing from the technical idea of the present disclosure.

(embodiment)
(1) Overview The monitoring system 100 of this embodiment includes a collection unit 712 as shown in FIG. The collection unit 712 collects monitoring information about the usage states of the monitoring targets including the plurality of circuit breakers 2 housed in the distribution board 1 .

In the distribution board 1 of this embodiment, as the circuit breakers 2, a main breaker 3, a plurality of branch breakers 4, a seismic breaker 5, and an interconnection breaker 6 are accommodated. Note that it is not essential that the distribution board 1 accommodates the seismic breaker 5 and the interconnection breaker 6 as the circuit breakers 2, and can be omitted as appropriate.

Here, the main breaker 3 has a detector 32 for detecting electric leakage. When the detection unit 32 detects an electric leakage in the circuit connected to the main breaker 3, the main breaker 3 performs a breaking operation to break the circuit. Although the wiring system of the distribution board 1 of the present embodiment is, for example, single-phase three-wire wiring, the detection unit 32 has a function of detecting a neutral line open-phase state in the single-phase three-wire wiring. Alternatively, when the detection unit 32 detects the neutral wire open-phase state, the main breaker 3 may perform the breaking operation. The detection unit 32 may also have a function of detecting a surge current generated by a lightning strike or the like, and when the detection unit 32 detects a surge current, the main breaker 3 may perform a breaking operation.

Further, each of the plurality of branch breakers 4 has a detection section 41 that detects overcurrent such as short-circuit current or overload current. When the detection unit 41 detects that an overcurrent is flowing through the circuit to which the branch breaker 4 is connected, the branch breaker 4 performs a circuit breaking operation.

The seismic breaker 5 has a seismic sensor 51 that detects vibration applied to the distribution board 1 due to an earthquake or the like. When the seismic sensor 51 detects a vibration exceeding a predetermined reference value, the seismic breaker 5 performs a breaking operation to break the circuit.

A distributed power supply 21 such as a solar power generation system, a fuel cell system, or a wind power generation system is connected to the interconnection breaker 6 . The interconnection breaker 6 is electrically connected between the electric line on the secondary side of the main breaker 3 and the distributed power supply 21 . The interconnection breaker 6 is used to interconnect the distributed power sources 21 with the system power source 20 and to disconnect the distributed power sources 21 from the system power source 20 . The interconnection breaker 6 has, for example, an earth leakage detection function for detecting earth leakage. When the earth leakage detection function of the interconnection breaker 6 detects an earth leakage in the circuit connected to the interconnection breaker 6, the interconnection breaker 6 performs a circuit breaking operation to disconnect the distributed power supply 21 from the system power supply 20. .

In this manner, the circuit breaker 2 having a breaking function breaks the circuit when it detects the occurrence of an abnormal event. Here, an abnormal event is, for example, a state in which an abnormal current such as an earth leakage current or an overcurrent flows, an abnormality such as an earth leakage, a short circuit, or an open phase in the neutral line in the circuit to which the circuit breaker 2 is connected. an earthquake, an occurrence of lightning, and/or the like.

In this embodiment, the collection unit 712 collects monitoring information about the usage status of the monitored object including the circuit breaker 2 . Here, the monitored objects of the monitoring system 100 include at least the plurality of circuit breakers 2 housed in the distribution board 1 . The objects to be monitored may include loads such as outlets 22 (see FIG. 1) or electric devices 23 and 24 (see FIG. 1) electrically connected to the circuit breaker 2 . That is, the collection unit 712 further collects information on the outlets 22 provided outside the distribution board 1 . The collection unit 712 also collects information about the operating states of the electrical devices 23 and 24 electrically connected to the circuit breaker 2 .

Therefore, the monitoring information about the usage state of the monitored object includes, for example, breaking information about the breaking operation of the circuit breaker 2 having a breaking function, aged information about the degree of deterioration of the circuit breaker 2, and connected load information.

The breaking information includes, for example, information indicating whether or not the circuit breaker 2 has performed a breaking operation (hereinafter also referred to as status information), and breaking cause related to an abnormal event that causes the circuit breaker 2 to break the circuit. information. The interruption cause information includes, for example, detection information of the current measuring device 8 (current sensor) that detects the current flowing through the circuit breaker 2, detection information of the leakage detection unit (detection unit 32) provided in the circuit breaker 2, and detection information of the circuit breaker 2. It includes the detection information of the neutral line open-phase detector provided in the circuit breaker 2 and the detection information of the seismic sensor 51 for detecting an earthquake, which is accommodated in the distribution board 1 . Therefore, the interruption information includes the detection information of the current measuring device 8 (current sensor), the detection information of the leakage detection unit (detection unit 32), the detection information of the neutral line open phase detection unit, and the operation of the interconnection breaker 6. information, and at least one of: In addition, the breaking function of the circuit breaker 2 is not limited to breaking the circuit with the occurrence of earth leakage, overcurrent, neutral line phase failure, earthquake, or lightning as a trigger, but with the occurrence of other events as a trigger. You can break the circuit. The contents of the disconnection information can also be changed as appropriate according to the event that triggers the disconnection function to disconnect the circuit.

The load information (hereinafter also referred to as load information) is information about the operating state of loads electrically connected to the circuit breaker 2 (for example, the outlet 22 and the electric devices 23 and 24). The load information includes, for example, the measured value of a temperature sensor provided inside the outlet 22, error information regarding an abnormality occurring in the electrical equipment 23, 24, and the like.

The aging information of the circuit breaker 2 is, for example, the operating time obtained by measuring the accumulated time for each circuit breaker 2 when the circuit breaker 2 is not performing the breaking operation.

As described above, the collection unit 712 collects monitoring information regarding the usage status of the monitored objects including a plurality of circuit breakers 2. Therefore, based on the monitoring information collected by the collection unit 712, a plurality of circuit breakers are collected. There is an advantage that the use state of the device 2 can be grasped and the usability is improved. For example, when any one of the circuit breakers 2 performs a breaking operation, the collection unit 712 collects monitoring information about a monitoring target including a plurality of circuit breakers 2. Therefore, the monitoring information collected by the collection unit 712 , it becomes easier to grasp the cause of the breaking operation performed by the circuit breaker 2 .

The distribution board 1 of the present embodiment also includes a monitoring system 100 and a distribution board cabinet 10 (see FIG. 2 ) that accommodates the collection unit 712 .

In the distribution board 1 of the present embodiment, the collection unit 712 is housed in the distribution board cabinet 10, and based on the monitoring information collected by the collection unit 712, the usage states of the plurality of circuit breakers 2 can be grasped. Therefore, there is an advantage that the distribution board 1 with improved usability can be provided.

(2) Details Hereinafter, a monitoring system 100 according to the present embodiment and a distribution board 1 including the monitoring system 100 will be described with reference to FIGS. 1 to 5. FIG.

The distribution board cabinet 10 of the distribution board 1 is installed and used in a facility 500 such as a dwelling unit of a detached house or collective housing, for example. The facility 500 in which the distribution board 1 is installed is not limited to each dwelling unit of a detached house or collective housing, but is installed in non-residential buildings (for example, factories, commercial buildings, office buildings, hospitals, schools, etc.). may be

In the following description, the X-axis direction is defined as the horizontal direction and the Z-axis direction is defined as the vertical direction in FIGS. 2 to 4 unless otherwise specified. A direction perpendicular to each of the X-axis direction and the Z-axis direction is defined as the front-rear direction. Furthermore, the positive direction of the X-axis direction is defined as the right side, and the positive direction of the Z-axis direction is defined as the upper side. However, these directions are only examples, and are not intended to limit the directions in which the distribution board cabinet 10 and the distribution board 1 are used. Also, the arrows indicating each direction in the drawings are only shown for explanation and are not substantial.

(2.1) Configuration As described above, the distribution board 1 includes the distribution board cabinet 10 that houses the circuit breaker 2 and the like.

As shown in FIG. 2, the distribution board cabinet 10 accommodates a plurality of circuit breakers 2, a measurement adapter 7, a current measurement device 8, a backup power supply 9 (see FIG. 1), and the like. Here, the plurality of circuit breakers 2 includes a main breaker 3, a plurality of branch breakers 4, a seismic breaker 5, and an interconnection breaker 6. Note that the distribution board cabinet 10 only needs to accommodate at least a plurality of circuit breakers 2 and the collection unit 712 (see FIG. 1). It is not essential that the distribution board cabinet 10 accommodate the current measuring device 8 and the backup power supply 9, and can be omitted as appropriate.

The distribution board cabinet 10 includes a box-shaped body 11 (see FIG. 2) with an open front surface and a cover 12 (see FIG. 3) that closes the opening of the body 11. As shown in FIG. In FIG. 2, illustration of the cover 12 is omitted. The distribution board cabinet 10 is attached to a construction material (for example, a building wall 110). Note that the distribution board cabinet 10 may be attached in a state in which a part or the whole is embedded in an attachment hole provided in the wall 110 . For example, the distribution board cabinet 10 is installed at a height that is out of the reach of a child of average height, but at a height that allows operation by an adult of average height. It is

The distribution board cabinet 10 further includes a lid 13 (see FIG. 4) that covers the front surface 121 of the cover 12 when the distribution board cabinet 10 is attached to the wall 110 . Lid 13 is attached to cover 12 so as to be movable between a closed position and an open position. The closed position is the position where the front surface 121 of the cover 12 is covered (the position shown in FIG. 4), and the open position is the position where at least part of the front surface 121 of the cover 12 is not covered (the position shown by the two-dot chain line in FIG. 3). . Lid 13 may cover a portion of front surface 121 of cover 12 when cover 12 is viewed from a certain direction. In this embodiment, the lid 13 in the closed position covers substantially the entire front surface 121 of the cover 12 when the cover 12 is viewed from the front.

Inside the distribution board cabinet 10, as shown in FIG. 2, a master breaker 3, a plurality of branch breakers 4, a seismic breaker 5, a grid connection breaker 6, a measurement adapter 7, and a current measurement device 8 are accommodated. ing. The main breaker 3, the plurality of branch breakers 4, the seismic breaker 5, the interconnection breaker 6, the measurement adapter 7, and the current measurement device 8 are attached to the body 11 directly or via attachment parts or the like. FIG. 2 shows the arrangement of the master breaker 3, the plurality of branch breakers 4, the seismic breaker 5, the interconnection breaker 6, the measurement adapter 7, and the current measurement device 8 inside the distribution board cabinet 10. These arrangements are examples and can be changed as appropriate. Although the backup power supply 9 is not shown in FIG. 2, the backup power supply 9 may be arranged at an appropriate position inside the distribution board cabinet 10 .

The main breaker 3 is arranged inside the distribution board cabinet 10 at a position slightly to the left of the center in the left-right direction. The position of the main breaker 3 inside the distribution board cabinet 10 may be other positions such as the right side of the center. The main breaker 3 has a contact 31 (see FIG. 1) electrically connected between the primary side terminal and the secondary side terminal. The main breaker 3 has an operation lever on its front surface for turning on or off the contact 31 . The master breaker 3 also includes a detection unit 32 (see FIG. 1) that detects an abnormal state in which an earth leakage current flows through the contact 31, for example. When the detection unit 32 detects an abnormal state in which an earth leakage current flows through the contact 31 , the main breaker 3 opens the contact 31 and cuts off the power supply to the circuit on the secondary side of the main breaker 3 . The detection unit 32 may have a detection function for detecting overcurrent such as short-circuit current or overload current. good too. In addition, the detection unit 32 may have a function of detecting a neutral wire open-phase state in single-phase three-wire wiring. When the detection unit 32 detects the neutral wire open-phase state, the main breaker 3 contacts 31 may be opened. Further, the main breaker 3 may have a limiter function that opens the contact 31 when a current exceeding a predetermined limit value flows.

The secondary side terminals of the main breaker 3 are connected to the conductive bar of the first voltage pole (L1 phase), the conductive bar of the second voltage pole (L2 phase), and the neutral pole (N phase) in the single-phase three-wire system wiring. A conductive bar is connected. Each conductive bar is formed in the shape of a long plate that is elongated in the left-right direction by a conductive member, and is arranged at the center in the vertical direction and on the right side of the main breaker 3 inside the cabinet 10 for the distribution board. there is

A plurality of branch breakers 4 are divided into the upper side and the lower side of each conductive bar, and arranged so as to line up in the left-right direction. In this embodiment, as shown in FIG. 2, 12 branch breakers 4 are arranged in the horizontal direction above each conductive bar. In addition, 11 branch breakers 4 are arranged in the horizontal direction below each conductive bar.

Each branch breaker 4 has a pair of primary side terminals and a pair of secondary side terminals. Each branch breaker 4 has a contact electrically connected between a primary side terminal and a secondary side terminal. An operation lever is provided on the front surface of each branch breaker 4 for turning on or off a contact built in each branch breaker 4 .

Branch breakers 4 are available for 100V and 200V. A pair of primary side terminals included in the branch breaker 4 for 100V are electrically connected to one of the conductive bar of the first voltage pole and the conductive bar of the second voltage pole and the conductive bar of the neutral pole, respectively. be. A pair of primary side terminals included in the branch breaker 4 for 200V are electrically connected to the conductive bar of the first voltage pole and the conductive bar of the second voltage pole, respectively. Corresponding wiring is electrically connected to the secondary side terminal of the branch breaker 4 . The wiring connected to the secondary side terminal of each branch breaker 4 includes, for example, lighting fixtures, electrical equipment 23 such as hot water supply equipment, outlets 22 (see FIG. 1), or wiring devices such as wall switches as loads. Connected. Therefore, the distribution board 1 is connected to the electrical equipment 23 connected to the secondary terminal of the branch breaker 4 via wiring, or the electrical equipment 24 (for example, an air conditioner, a television receiver, etc.) connected to the outlet 22. Power can be supplied.

The branch breaker 4 also includes a detection unit 41 (see FIG. 1) that detects an abnormal state in which an overcurrent such as a short-circuit current or an overload current flows through a contact built in the branch breaker 4 . When the detection unit 41 detects an abnormal state in which overcurrent flows through the contacts, the branch breaker 4 opens the contacts to protect the circuit connected to the branch breaker 4 . Note that the detection unit 41 may have a function of detecting an abnormal state in which an electric wire or the like is about to break in a circuit connected to the branch breaker 4 . For example, the branch breaker 4 may cut off the circuit when the detector 41 detects intermittent arcing when the wire is about to break based on the current waveform of the current flowing through the circuit. Further, the detection unit 41 may have a function of detecting an electric leakage state of the circuit to which the branch breaker 4 is connected. good.

The seismic breaker 5 is arranged so as to line up with the branch breaker 4 in the left-right direction under the conductive bar. The seismic breaker 5 has a seismic sensor 51 that detects vibration applied to the distribution board cabinet 10 . When the seismic sensor 51 detects a vibration exceeding a predetermined reference value (for example, seismic motion with a seismic intensity of 5), the seismic breaker 5 performs a breaking operation to break the circuit. The seismic breaker 5 generates a pseudo electric leakage state by electrically connecting, for example, the first voltage pole or the second voltage pole and the neutral pole via an impedance element with a relatively low resistance. When the seismic breaker 5 generates a pseudo electric leakage state, the detector 32 of the master breaker 3 detects the pseudo electric leakage state generated by the seismic breaker 5, and the master breaker 3 opens the contact 31. Let As a result, when the distribution board cabinet 10 is subjected to vibration exceeding the reference value due to an earthquake or the like, the power supply to the circuit connected to the secondary side of the master breaker 3 can be cut off.

A distributed power supply 21 provided in a facility 500 is connected to the interconnection breaker 6 . The interconnection breaker 6 is electrically connected between the conductive bar electrically connected to the secondary side terminal of the main breaker 3 and the distributed power supply 21 . When the contact of the interconnection breaker is turned on, the distributed power supply 21 can be interconnected with the system power supply 20 to supply power to the load. On the other hand, when the contact of the interconnection breaker 6 is turned off, the distributed power supply 21 is disconnected from the system power supply 20 . The interconnection breaker 6 has a detection function of detecting occurrence of electric leakage, for example. When the detection function of the interconnection breaker 6 detects the occurrence of the electric leakage, the interconnection breaker 6 performs a breaking operation to disconnect the distributed power supply 21 from the system power supply 20 . The interconnection breaker 6 may have a detection function for detecting an overcurrent such as a short-circuit current. may be configured to

Here, as shown in FIG. 2, the bottom wall of the body 11 that accommodates the circuit breaker 2 is provided with a through hole 111 passing through the bottom wall in the front-rear direction. Therefore, the electric wire introduced into the inside of the distribution board cabinet 10 from the outside of the distribution board cabinet 10 through the through hole 111 is electrically connected to the circuit breaker 2 (the main breaker 3, the branch breaker 4, and the interconnection breaker 6). connected

The current measuring device 8 is configured to measure the current flowing through loads (electrical devices 23 , 24 , etc.) connected to each of the plurality of branch breakers 4 . The current measuring device 8 has, for example, a substrate and a plurality of coils. The substrate has a plate shape elongated in the left-right direction. A plurality of holes are formed in the substrate. Terminals extending from the conductive bar and connected to the primary terminals of the branch breaker 4 are inserted into the plurality of holes. The coil is, for example, a Rogowski coil and is formed around the hole in the substrate. In this embodiment, the current measuring device 8 measures the current flowing through each of the plurality of branch breakers 4 and the interconnection breakers 6 . Here, the current measuring device 8 (current sensor) is shared with a sensor used in an energy management system that manages energy used in the facility 500 where the distribution board 1 is installed. Note that the current measuring device 8 is not limited to one having a Rogowski coil. It's okay.

The backup power supply 9 includes a battery 91 that is a secondary battery such as a nickel-metal hydride battery or a lithium ion battery, and a charging circuit that charges the battery 91 . The charging circuit of the backup power supply 9 receives power supply from the primary side of the main breaker 3 and charges the battery 91 . The backup power supply 9 supplies power to the measurement adapter 7 and the like using the battery 91 as a power supply when the system power supply 20 fails. Therefore, even if the system power supply 20 fails, the measurement adapter 7 can receive power from the backup power supply 9 and operate. That is, the collection unit 712 of the measurement adapter 7 can acquire operating power from the battery 91 housed in the distribution board 1 .

The measurement adapter 7 is arranged on the left side of the main breaker 3 inside the distribution board cabinet 10 . The measurement adapter 7 has a measurement function of measuring power passing through at least one of the main breaker 3 and the branch breaker 4 in the distribution board 1, and a communication function of communicating with devices arranged outside the distribution board cabinet 10. have. In addition, in this embodiment, the measurement adapter 7 has a collection function of collecting monitoring information regarding the usage status of the monitoring target including the circuit breaker 2 . Since the measurement adapter 7 operates by being supplied with power from the primary side of the main breaker 3, it can operate even when the main breaker 3 performs a breaking operation. If the system power supply 20 fails, the measurement adapter 7 receives power from the backup power supply 9, so it can operate even when the system power supply 20 fails.

More specifically, the measurement adapter 7 of this embodiment includes a control section 71 , a communication section 72 , a notification section 73 and a storage section 74 . In this embodiment, the monitoring system 100 is configured by the measurement adapter 7 having the collection unit 712 .

The measurement adapter 7 includes, for example, a computer system. A computer system is mainly composed of a processor and a memory as hardware. The function of the control unit 71 is realized by the processor executing a program recorded in the memory of the computer system. The program may be recorded in advance in the memory of the computer system, may be provided through an electric communication line, or may be recorded in a non-temporary recording medium such as a computer system-readable memory card, optical disk, or hard disk drive. may be provided.

The control unit 71 has at least the functions of a measurement unit 711 , a collection unit 712 and an output unit 713 .

The measurement adapter 7 of this embodiment is electrically connected to a main current measuring device for measuring the current flowing through the main breaker 3 and a current measuring device 8 . Here, the master current measuring device has a current sensor, for example, a current transformer (CT). The measurement unit 711 of the measurement adapter 7 receives from the current measurement device 8 the values of the currents flowing through each of the plurality of branch breakers 4 and the interconnection breakers 6 measured by the current measurement device 8 . Furthermore, the measurement unit 711 of the measurement adapter 7 receives the current value measured by the main current measuring device from the main current measuring device. The measuring unit 711 converts each of the current values measured by the current measuring device 8 and the master current measuring device into power values (instantaneous power values). The measurement unit 711 also has a function of calculating power amount data by integrating collected instantaneous power data over a predetermined period of time.

The collection unit 712 collects monitoring information about the usage states of the monitoring targets including the plurality of circuit breakers 2 housed in the distribution board 1 . A collection unit 712 periodically collects monitoring information. For example, the collecting unit 712 collects current values of currents flowing through the plurality of circuit breakers 2 from the master current measuring device and the current measuring device 8 as monitoring information. The collection unit 712 also collects the measurement results of the seismic sensor 51 from the seismic breaker 5 as monitoring information. For example, when the measurement adapter 7 and the seismic breaker 5 each have a wireless communication function, the measurement adapter 7 and the seismic breaker 5 communicate with each other, whereby the collection unit 712 transfers the signals from the seismic breaker 5 to the seismic sensor 51 . Collect measurements. In addition, the measurement adapter 7 may be configured to acquire the measurement result from the voltage measurement unit that measures the inter-terminal voltage of the secondary side terminal of the circuit breaker 2, and the collection unit 712 is configured to acquire the measurement result of the voltage measurement unit. Based on the results, information is collected that indicates whether each circuit breaker 2 is performing a breaking operation.

Further, when any of the circuit breakers 2 performs the breaking operation, the control unit 71 collects the monitoring information collected by the collecting unit 712 to determine whether the cause of the breaking operation of the circuit breaker 2 is an electric leakage or a short circuit. , overloads, earthquakes, and lightning strikes.

Then, the output unit 713 stores, in the storage unit 74, the notification information including the monitoring information collected by the collecting unit 712 and information on the result of estimating the cause of the blocking operation by the control unit 71 aggregating the monitoring information. do. Here, before the circuit breaker 2 breaks the circuit, the output unit 713 may cause the storage unit 74 to store the notification information (monitoring information and estimation result of the cause of the breaking operation), or the circuit breaker The notification information may be stored in the storage unit 74 after 2 interrupts the circuit. Here, the storage unit 74 stores the notification information (monitoring information and estimation result of the cause of the blocking operation) in the ring buffer. The storage unit 74 overwrites the oldest monitoring information with the latest monitoring information. may be stored. In addition, the output unit 713 causes the storage unit 74 to store the notification information so as not to overwrite the monitoring information of the circuit breaker 2 that performed the breaking operation when the breaking operation is performed by one of the circuit breakers 2. good too. In other words, the collection unit 712 stores at least monitoring information about the circuit breaker 2 that has performed the breaking operation among the plurality of circuit breakers 2 .

In addition, the output unit 713 transmits the notification information read from the storage unit 74 to the notification unit 73 at the timing of notifying the user of the distribution board 1 of the notification information (monitoring information and estimation result of the cause of the interruption operation). A notification operation of outputting the notification information and notifying the notification information by the notification unit 73 is performed. Here, the timing at which the notification unit 73 notifies the notification information is, for example, a predetermined period after any one of the circuit breakers 2 performs the breaking operation. The timing of notifying the notification information may be the timing at which the user of the distribution board 1 re-closes the circuit breaker 2 that has performed the breaking operation after any circuit breaker 2 has performed the breaking operation. The output unit 713 detects the presence of a person around the distribution board cabinet 10 after any of the circuit breakers 2 performs the breaking operation. Notification information may be notified at the timing of detection. The human sensor is, for example, an infrared sensor that detects infrared rays emitted from the human body. A sensor that detects the presence of a person may also be used. In addition, the output unit 713 outputs the notification information at the timing when, for example, the sensor for detecting opening/closing of the lid 13 detects that the lid 13 is opened after any circuit breaker 2 performs the breaking operation. may notify you.

In this way, since the notification unit 73 notifies the notification information, the user of the distribution board 1 confirms the notification information (monitoring information and estimation result of the cause of the interruption operation) notified from the notification unit 73. be able to. Therefore, the user of the distribution board 1 can grasp the cause of the interruption operation based on the notification information notified from the notification unit 73 before performing the work to restore the circuit breaker 2 that has performed the interruption operation. become. Therefore, the user of the distribution board 1 can understand the cause of the breaking operation, and then perform recovery work or the like for the circuit breaker 2 that has performed the breaking operation.

Note that even when the master breaker 3 performs a cutoff operation, power is supplied to the measurement adapter 7 from the primary side of the master breaker 3. A notification operation for notifying notification information can be performed. In addition, since power is supplied from the backup power supply 9 to the measurement adapter 7 in the event of a power failure of the system power supply 20, the collection operation of collecting monitoring information by the collection unit 712 and the notification operation of notifying the notification information by the notification unit 73 are performed. It can be carried out. Although the backup power supply 9 is provided outside the measurement adapter 7 in this embodiment, the backup power supply 9 may be built in the measurement adapter 7 .

The communication unit 72 communicates with the controller 25 or the like installed in the facility 500 . The controller 25 controls or monitors devices compatible with HEMS (Home Energy Management System) (hereinafter referred to as HEMS compatible devices). In other words, the controller 25 can acquire the instantaneous power and the amount of power in each of the plurality of loads (electrical devices 23, 24, etc.) connected to the plurality of branch breakers 4 by communicating with the measurement adapter 7. and can control or monitor HEMS-enabled devices. The controller 25 is arranged outside the distribution board cabinet 10 . Here, HEMS-compatible devices include, for example, smart meters, solar power generation devices, power storage devices, fuel cells, electric vehicles, air conditioners, lighting fixtures, water heaters, refrigerators, television receivers, and the like. Note that HEMS-compatible devices are not limited to these devices.

The communication method between the communication unit 72 and the controller 25 is, for example, a 920 MHz band specified low-power radio station (radio station that does not require a license), Wi-Fi (registered trademark), or Bluetooth (registered trademark). It is a standard-compliant wireless communication using radio waves as a medium. A communication method between the communication unit 72 and the controller 25 may be wired communication conforming to a communication standard such as a wired LAN (Local Area Network). Further, the communication protocol for communication between the communication unit 72 and the controller 25 is, for example, Ethernet (registered trademark), ECHONET Lite (registered trademark), or the like.

The communication unit 72 also has a communication function to communicate with the management server 300 and the mobile terminal 400 via a wide area network 200 such as the Internet. Here, the mobile terminal 400 is a terminal carried by the user of the distribution board 1, such as a smart phone or a tablet computer.

The notification unit 73 includes a light-emitting display unit 731 provided on the measurement adapter 7 and a speaker. The notification unit 73 uses the light-emitting display unit 731 (see FIG. 2) and a speaker to perform notification based on the notification information (monitoring information and estimated result of the cause of the blocking operation) stored in the storage unit 74 . The light-emitting display unit 731 includes, for example, a plurality of light-emitting diodes whose emission colors are classified according to the cause of the cutoff operation. The light-emitting display section 731 is provided on the surface of the measurement adapter 7 at a portion exposed from the opening of the front surface 121 of the cover 12 . The notification unit 73 emits light from a light-emitting diode of a color corresponding to the cause of the blocking operation, based on the notification information output from the output unit 713, for example. In addition, based on the notification information output from the output unit 713, the notification unit 73 causes the speaker to output a voice message that notifies the cause of the blocking operation by voice. As described above, in the present embodiment, the notification unit 73 notifies the notification information using both light and sound. good.

The storage unit 74 includes, for example, electrically rewritable nonvolatile memory such as EEPROM (Electrically Erasable Programmable Read-Only Memory) and volatile memory such as RAM (Random Access Memory). The storage unit 74 stores information such as monitoring information collected by the collection unit 712 .

(2.2) Operation The operation of the monitoring system 100 of this embodiment will be described with reference to FIG.

The collection unit 712 of the monitoring system 100 (measurement adapter 7) periodically performs a collection process of collecting monitoring information on a monitoring target including a plurality of circuit breakers 2 (S1), and stores the collected monitoring information in the storage unit 74. Remember.

Based on the monitoring information collected by the collection unit 712, the control unit 71 of the measurement adapter 7 determines whether an abnormal event such that the circuit breaker 2 performs a breaking operation has occurred (S2).

If no abnormal event has occurred (S2: No), the collection unit 712 of the measurement adapter 7 periodically performs a collection process of collecting monitoring information for a monitoring target including a plurality of circuit breakers 2 (S1). , the collected monitoring information is stored in the storage unit 74 .

On the other hand, if an abnormal event has occurred (S2: Yes), in the monitoring system 100, the collecting unit 712 collects monitoring information before any circuit breaker 2 performs the breaking operation (S3), The collected monitoring information is stored in the storage unit 74 . Further, the control unit 71 estimates the cause of the blocking operation based on the monitoring information collected by the collecting unit 712 and stores the result of estimation of the cause of the blocking operation in the storage unit 74 . Thus, when the circuit breaker 2 performs the breaking operation, the collection unit 712 collects the monitoring information, and the output unit 713 sends the notification information including the monitoring information and the estimation result of the cause of the breaking operation to the storage unit 74. Since it is stored, it is possible to save the notification information at the timing when the cutoff operation is performed. Therefore, after the circuit breaker 2 performs the breaking operation, the user of the distribution board 1 can grasp the cause of the breaking operation based on the notification information stored in the storage unit 74 . In addition, since the monitoring information also includes information about the usage status of the outlet 22 and the electrical devices 23 and 24, the user of the distribution board 1 can check the usage status of the outlet 22 and the electrical devices 23 and 24 based on the monitoring information. easier to comprehend. In addition, since the monitoring information also includes aging information of the outlet 22 and the electric devices 23 and 24, the user of the distribution board 1 can determine the degree of deterioration or replacement of the outlet 22 and the electric devices 23 and 24 based on the monitoring information. It becomes easier to grasp the time etc.

After that, when any one of the circuit breakers 2 performs a breaking operation (S4), the user of the distribution board 1 (a resident of the facility 500, etc.) can stop the operation of the electrical equipment connected to the broken circuit. Therefore, in order to confirm the state of the distribution board 1, the user moves to the place where the distribution board 1 is installed.

Here, when the human sensor provided on the distribution board 1 detects a person approaching the distribution board 1 (S5: Yes), the output unit 713 outputs the notification information stored in the storage unit 74. , performs the operation of outputting the notification information. That is, the output unit 713 outputs the notification information stored in the storage unit 74 to the notification unit 73, and the notification unit 73 notifies based on the notification information (S6). The notification unit 73, for example, based on the notification information, lights a light-emitting diode of a light-emitting color corresponding to the cause of the blocking operation, or outputs a voice message notifying the cause of the blocking operation from the speaker. process.

As a result, a user near the distribution board 1 hears the voice message output from the speaker or opens the cover 13 and sees the display by the light-emitting diode, thereby causing the circuit breaker 2 to perform the breaking operation. You can figure out what caused it. Therefore, since the user can grasp the cause of the breaking operation of the circuit breaker 2 before performing the restoration work of the circuit breaker 2, the cause of the breaking operation of the circuit breaker 2 can be eliminated. appropriate measures can be taken. For example, if the cause of the breaking action of the circuit breaker 2 is an overcurrent, the user can eliminate the cause of the breaking action by stopping the electrical equipment connected to the circuit breaker 2 that has performed the breaking action. . In addition, if the cause of the breaking operation of the circuit breaker 2 is an earth leakage, a short circuit, a phase loss in the neutral line, or the like, the user can take measures such as requesting an electrician to inspect the electric equipment safely. Available. In this way, the user of the distribution board 1 can restore the circuit breaker 2 after performing the process for eliminating the cause of the interruption operation. can be done properly.

(3) Modifications The embodiment described above is merely one of various embodiments of the present disclosure. The above-described embodiment can be modified in various ways according to design and the like, as long as the object of the present disclosure can be achieved. Also, functions similar to those of the monitoring system 100 may be embodied by a monitoring method, a computer program, a non-temporary recording medium recording the program, or the like. A monitoring method according to one aspect collects monitoring information about the usage status of a monitoring target including a plurality of circuit breakers 2 housed in a distribution board 1 . A (computer) program according to one aspect is a program for causing a computer system to execute the monitoring method described above.

Modifications of the above embodiment are listed below. Modifications described below can be applied in combination as appropriate. In addition, below, the said embodiment may be called a "basic example."

The monitoring system 100 in the present disclosure includes a computer system, for example, in the collection unit 712 and the like. A computer system is mainly composed of a processor and a memory as hardware. The functions of the monitoring system 100 in the present disclosure are realized by the processor executing a program recorded in the memory of the computer system. The program may be recorded in advance in the memory of the computer system, may be provided through an electric communication line, or may be recorded in a non-temporary recording medium such as a computer system-readable memory card, optical disk, or hard disk drive. may be provided. A processor in a computer system consists of one or more electronic circuits, including semiconductor integrated circuits (ICs) or large scale integrated circuits (LSIs). The integrated circuit such as IC or LSI referred to here is called differently depending on the degree of integration, and includes integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). In addition, a field-programmable gate array (FPGA) that is programmed after the LSI is manufactured, or a logic device capable of reconfiguring the bonding relationship inside the LSI or reconfiguring the circuit partitions inside the LSI may also be adopted as the processor. can be done. A plurality of electronic circuits may be integrated into one chip, or may be distributed over a plurality of chips. A plurality of chips may be integrated in one device, or may be distributed in a plurality of devices. A computer system, as used herein, includes a microcontroller having one or more processors and one or more memories. Accordingly, the microcontroller also consists of one or more electronic circuits including semiconductor integrated circuits or large scale integrated circuits.

In addition, it is not an essential configuration of the monitoring system 100 that a plurality of functions in the monitoring system 100 are integrated into one housing (measurement adapter 7). It may be distributed and provided. Furthermore, at least part of the functions of the monitoring system 100, such as the collection unit 712, may be realized by, for example, the cloud (cloud computing). Conversely, all functions of the monitoring system 100 may be integrated into one housing (measurement adapter 7) as in the above embodiment.

In the above embodiment, in the comparison of two values such as the measured value of the current, "exceeding" may be "greater than or equal to". That is, in the comparison of two values, whether or not the two values are equal can be arbitrarily changed depending on the setting of the reference value, etc., so there is no technical difference between "exceeding" and "greater than or equal to".

(3.1) Modification 1
In the basic example, the notification unit 73 uses the light-emitting display unit 731 or the speaker provided on the distribution board 1 to notify the notification information. Information may be provided.

The display device is, for example, a thin display device such as a liquid crystal display or an organic EL (Electro Luminescence) display, and is attached to the front surface of the lid 13 or the front surface 121 of the cover 12 (see FIGS. 3 and 4).

In this case, the output unit 713 outputs the notification information read from the storage unit 74 to the notification unit 73 at the timing of notifying the user of the distribution board 1 of the notification information, and the notification unit 73 outputs the notification information to the display device. display. Here, since the distribution board 1 is provided with the backup power supply 9, even in a state where the system power supply 20 fails, the notification unit 73 and the display device receive power supply from the backup power supply 9 and transmit the notification information. It can be displayed on a display device.

Note that, in this modification, the notification unit 73 may perform both the process of displaying notification information using a display device and the process of outputting a voice message including the notification information using a speaker. Notification information can be notified by both and voice.

(3.2) Modification 2
In the basic example, the output unit 713 of the monitoring system 100 stores the notification information including the monitoring information collected by the collecting unit 712 and the estimated result of the cause of the interruption operation in the distribution board 1 (the measurement adapter 7 in the basic example). Although it is stored in the unit 74 , the storage location of the notification information may be outside the distribution board 1 .

For example, the output unit 713 transmits notification information (monitoring information and estimation result of the cause of the blocking operation) to the management server 300 via the communication unit 72, and causes the storage unit of the management server 300 to store the notification information. good too.

Since the management server 300 is located outside the facility 500, even if a power failure occurs in an area including the facility 500, the management server 300 is less likely to be affected by the power failure and can store notification information.

When notification information is stored in the management server 300 , the user of the distribution board 1 accesses the management server 300 using the mobile terminal 400 or computer terminal and browses the notification information stored in the management server 300 . That is, when accessed from the mobile terminal 400 or the computer terminal, the management server 300 serving as the notification unit outputs the notification information stored in the storage unit to the mobile terminal 400 or the computer terminal. Thereby, the user of the distribution board 1 can view the notification information stored in the management server 300 using the mobile terminal 400 or the computer terminal. Therefore, the user of the distribution board 1 can grasp the cause of the interruption operation based on the monitoring information collected by the collection unit 712 and the estimated result of the cause of the interruption operation.

Note that the output unit 713 of the monitoring system 100 may transmit the notification information to the mobile terminal 400 via the communication unit 72 and cause the storage unit of the mobile terminal 400 to store the notification information. In this case, application software for acquiring notification information from the monitoring system 100 and notifying the user is installed in the mobile terminal 400 . When the processor of the mobile terminal 400 executes this application software, a function of acquiring notification information from the monitoring system 100 and notifying the acquired notification information is realized.

Since the mobile terminal 400 operates by receiving power from a built-in battery, even if there is a power outage in the area including the facility 500, the mobile terminal 400 is less likely to be affected by the power outage and can store the notification information. .

When notification information is stored in the mobile terminal 400 , the user of the distribution board 1 uses the mobile terminal 400 to view the notification information stored in the storage unit of the mobile terminal 400 . That is, when the mobile terminal 400 serving as the notification unit receives a user's operation, the mobile terminal 400 displays the notification information stored in the storage unit on the display device of the mobile terminal 400, or outputs a voice message or the like from the speaker of the mobile terminal 400. do. As a result, the user of the distribution board 1 can view the notification information using the mobile terminal 400 serving as the notification unit, and based on the monitoring information collected by the collection unit 712 and the estimation result of the cause of the blocking operation, Therefore, it becomes possible to grasp the cause of the interruption operation.

(3.3) Modification 3
In a basic example, the notification unit 73 uses the light-emitting display unit 731 or the speaker provided on the distribution board 1 to notify the notification information. may be sent to the e-mail address of Here, in the monitoring system 100, the mail address of the notification destination is registered in advance by the user of the distribution board 1 or the like. The e-mail address of the notification destination is, for example, the e-mail address of the mobile terminal 400 carried by the user of the distribution board 1 .

The collection unit 712 periodically collects monitoring information, and the output unit 713 causes the storage unit 74 to store the monitoring information collected by the collection unit 712 . In addition, when any circuit breaker 2 performs a breaking operation, the output unit 713 also causes the storage unit 74 to store an estimation result of estimating the cause of the breaking operation based on the monitoring information. Then, when any one of the circuit breakers 2 performs the breaking operation, the output unit 713 creates an e-mail including the notification information read from the storage unit 74, and transmits the created e-mail from the communication unit 72 to the destination. be sent to the e-mail address of At this time, the mobile terminal 400 has an e-mail reception notification, and the user of the distribution board 1 can operate the mobile terminal 400 to open the e-mail, thereby viewing the notification information contained in the e-mail. . Therefore, the user of the distribution board 1 can view the notification information using the mobile terminal 400 serving as the notification unit, and based on the monitoring information collected by the collection unit 712 and the estimation result of the cause of the interruption operation. Therefore, it becomes possible to grasp the cause of the interruption operation.

(3.4) Other Modifications In the basic example, the collection unit 712 collects monitoring information periodically, but the time interval at which the collection unit 712 collects monitoring information is fixed at a constant time. may be changed at any time. That is, the collection unit 712 can change the time interval for collecting monitoring information.

For example, when the control unit 71 determines that there is an increased possibility that any one of the circuit breakers 2 will perform a breaking operation based on the monitoring information collected by the collecting unit 712, the time interval at which the collecting unit 712 collects the monitoring information is set to , may be shorter than the normal time when the circuit breaker 2 is not performing the breaking operation.

In the basic example, the control unit 71 may use, for example, a machine-learned model to estimate the cause of the circuit breaker 2 performing the breaking operation. Note that the trained model used by the control unit 71 may be re-learnable while the monitoring system 100 is in use.

In the basic example, the notification unit 73 notifies the notification information including the monitoring information collected by the collection unit 712 and the results of the estimation of the cause of the blocking operation by the control unit 71 based on the monitoring information. It is not essential for the unit 73 to notify the estimated result of the cause of the blocking operation. The notification unit 73 may notify only the monitoring information collected by the collection unit 712, and the user of the distribution board 1 can grasp the cause of the cutoff operation based on the monitoring information notified by the notification unit 73. easier.

(summary)
As explained above, the monitoring system (100) according to the first aspect includes the collection unit (712). A collection unit (712) collects monitoring information about the usage status of monitored objects including a plurality of circuit breakers (2) housed in a distribution board (1).

According to this aspect, the user of the distribution board (1) can easily grasp the usage state of the monitoring target based on the monitoring information collected by the collecting unit (712), and the usability can be improved.

In the monitoring system (100) according to the second aspect, in the first aspect, the monitoring information includes breaking information related to breaking operation of the circuit breaker (2).

According to this aspect, the user of the distribution board (1) can easily grasp the usage state of the monitoring target based on the monitoring information collected by the collecting unit (712), and the usability can be improved.

In the monitoring system (100) according to the third aspect, in the second aspect, the interruption information includes detection information of the current sensor (8) and detection information of the leakage detector (32) included in the circuit breaker (2). and the detection information of the neutral line open phase detection unit (32) provided in the circuit breaker (2), the detection information of the seismic sensor (51), and the operation information of the interconnection breaker (6). including at least one. A current sensor (8) detects the current flowing through the circuit breaker (2). A seismic sensor (51) is housed in the distribution board (1) and detects an earthquake. The interconnection breaker (6) is housed in the distribution board (1) and electrically connected between the distributed power supply (21) and the system power supply (20).

According to this aspect, the user of the distribution board (1) can easily grasp the usage state of the monitoring target based on the monitoring information collected by the collecting unit (712), and the usability can be improved.

In the monitoring system (100) according to the fourth aspect, in the third aspect, the current sensor (8) is an energy management system that manages the energy used in the facility (500) where the distribution board (1) is installed. It is shared with the sensors used in the system.

According to this aspect, one current sensor (8) can serve as both a sensor for collecting monitoring information and a sensor for an energy management system.

In the monitoring system (100) according to the fifth aspect, in any one of the first to fourth aspects, the collection unit (712) receives operating power from the battery (91) housed in the distribution board (1). It is obtainable.

According to this aspect, the collection unit (712) can be operated even when the system power supply (20) fails.

In the monitoring system (100) according to the sixth aspect, in any one of the first to fifth aspects, the collection unit (712) can change the time interval for collecting monitoring information.

According to this aspect, usability can be improved.

In the monitoring system (100) according to the seventh aspect, in any one of the first to sixth aspects, the collection unit (712) includes a At least store monitoring information about (2).

According to this aspect, the user of the distribution board (1) can grasp the usage state of the circuit breaker (2) that has performed the breaking operation.

In the monitoring system (100) according to the eighth aspect, in any one of the first to seventh aspects, the collection unit (712) collects information on the outlet (22) provided outside the distribution board (1) collect more.

According to this aspect, the user of the distribution board (1) can grasp the usage state of the outlet (22).

In the monitoring system (100) according to the ninth aspect, in any one of the first to eighth aspects, the collection unit (712) includes an electrical device (23, 24) further collects information about the operational status of;

According to this aspect, the user of the distribution board (1) can grasp the operation state of the electrical equipment (23, 24).

A monitoring method according to a tenth aspect collects monitoring information relating to the usage status of objects to be monitored including a plurality of circuit breakers (2) housed in a distribution board (1).

According to this aspect, the user of the distribution board (1) can easily grasp the usage state of the monitoring target based on the collected monitoring information, and the usability can be improved.

A program according to an eleventh aspect is a program for causing a computer system to execute the monitoring method according to the tenth aspect.

According to this aspect, the user of the distribution board (1) can easily grasp the usage state of the monitoring target based on the collected monitoring information, and the usability can be improved.

A distribution board (1) according to a twelfth aspect includes a monitoring system (100) according to any one of the first to ninth aspects, a distribution board cabinet (10) containing a collection unit (712), Prepare.

According to this aspect, the user of the distribution board (1) can easily grasp the usage state of the monitoring target based on the monitoring information collected by the collecting unit (712), and the usability can be improved.

Various configurations (including modifications) of the monitoring system (100) according to the above-described embodiment are not limited to the above-described aspects, and can be embodied by a monitoring method, a (computer) program, or a non-temporary recording medium recording the program. It is possible.

The configurations according to the second to ninth aspects are not essential to the monitoring system (100), and can be omitted as appropriate.

1 distribution board 2 circuit breaker 6 grid breaker 8 current measuring device (current sensor)
10 Distribution board cabinet 20 System power supply 21 Distributed power supply 22 Outlet 23, 24 Electrical equipment 32 Detector (earth leakage detector, neutral line open phase detector)
51 seismic sensor 91 battery 100 monitoring system 712 collecting unit

Claims (11)

A collection unit that collects monitoring information about the usage status of a monitored object including a plurality of circuit breakers housed in a distribution board,
the monitoring information includes breaking information related to breaking operation of the circuit breaker;
The breaking information includes state information indicating whether or not the plurality of circuit breakers have performed a breaking operation,
the monitoring information is stored in a ring buffer;
At least one of the monitoring information for a predetermined period before the breaking operation of the circuit breaker and the monitoring information for the circuit breaker that has broken is stored so as not to be overwritten.
Monitoring system. The breaking information includes detection information from a current sensor that detects current flowing through the circuit breaker, detection information from a leakage detection unit included in the circuit breaker, and neutral line open-phase detection unit included in the circuit breaker. It is electrically connected between the detection information, the detection information of the seismic sensor for detecting earthquakes stored in the distribution board, and the distributed power supply and the system power supply stored in the distribution board. operating information of the grid breaker
A surveillance system according to claim 1 . The monitoring system according to claim 2, wherein the current sensor is shared with a sensor used in an energy management system that manages energy used in facilities where the distribution board is installed. The collection unit is capable of acquiring operating power from a battery housed in the distribution board.
The monitoring system according to any one of claims 1-3. The collection unit can change the time interval for collecting the monitoring information.
The monitoring system according to any one of claims 1-4. The collection unit stores at least the monitoring information regarding a circuit breaker that has performed a breaking operation among the plurality of circuit breakers.
A monitoring system according to any one of claims 1-5. The collection unit further collects information on outlets provided outside the distribution board,
A monitoring system according to any one of claims 1-6. The collecting unit further collects information about the operating state of the electrical equipment electrically connected to the circuit breaker.
A monitoring system according to any one of claims 1-7. collecting monitoring information regarding the usage of monitored objects including multiple circuit breakers housed in a distribution board;
the monitoring information includes breaking information related to breaking operation of the circuit breaker;
The breaking information includes state information indicating whether or not the plurality of circuit breakers have performed a breaking operation,
the monitoring information is stored in a ring buffer;
At least one of the monitoring information for a predetermined period before the breaking operation of the circuit breaker and the monitoring information for the circuit breaker that has broken is stored so as not to be overwritten.
Monitoring method. for causing a computer system to execute the monitoring method according to claim 9,
program. A monitoring system according to any one of claims 1 to 8;
a distribution board cabinet that houses the collection unit;
Distribution board.

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