Circuit breaker system, circuit breaker, distribution board, circuit breaker method, and program

Abstract

To suppress restart of power to the breaker under the situation that there are no people around after a power outage due to a disaster.SOLUTION: A shutoff system 10 includes an acquisition unit 122 and a shutoff control unit 124. The acquisition unit 122 acquires information on power outage duration Tc which is the duration of the power outage that has occurred in a grid power supply 90. The shutoff control unit 124 is configured so as to, when the power outage duration Tc exceeds a predetermined threshold time Tth, turn off a contact part 21 of a breaker 20 connected to the grid power supply 90.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure generally relates to a shutoff system, a breaker, a distribution board, a shutoff method, and a program. More specifically, the present disclosure relates to a shutoff system that controls shutoff of a breaker connected to a power grid, a breaker including the shutoff system, a distribution board including the breaker, a shutoff method for controlling shutoff of the breaker, and a program for executing the shutoff method. [Background technology]

[0002] Patent Document 1 describes an earthquake-sensing cutoff system equipped with an earthquake-sensing relay in a distribution board that detects the occurrence of an earthquake. In this earthquake-sensing cutoff system, when an earthquake of a predetermined seismic intensity or greater occurs, the earthquake-sensing relay cuts off the main breaker of the distribution board after a certain period of time. In addition, when an earthquake occurs, the earthquake-sensing cutoff system immediately cuts off some of the branch breakers of the distribution board.

[0003] Patent Document 1 also describes that when power is restored after a power outage, information about the power restoration is displayed on the display unit. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-68098 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the distribution board described in Patent Document 1, if a power outage occurs due to a disaster other than an earthquake, the main breaker is kept on. Therefore, when power is restored after a power outage caused by a disaster, there is a possibility that power will be restored to the breaker even when no one is around the breaker.

[0006] The present disclosure has been made in consideration of the above-mentioned reasons, and aims to prevent a situation in which power is restored to a breaker when no one is around after a power outage caused by a disaster. [Means for solving the problem]

[0007] A shutdown system according to one aspect of the present disclosure includes an acquisition unit, a shutdown control unit, and a receiving unit. The acquisition unit acquires information on a power outage duration, which is the duration of a power outage that occurs in a power grid. When the power outage duration exceeds a predetermined threshold time, the shutdown control unit turns off a contact unit of a breaker connected to the power grid. The receiving unit receives an instruction signal from an external device instructing the contact unit to be turned off. When the receiving unit receives the instruction signal after the power outage duration exceeds the threshold time, the shutdown control unit turns off the contact unit. 。

[0008] A breaker according to an aspect of the present disclosure includes the interruption system, the contact unit, and a housing, the housing holding the acquisition unit, the interruption control unit, and the contact unit.

[0009] A distribution board according to an aspect of the present disclosure includes the interrupting system and a cabinet for the distribution board. The cabinet for the distribution board houses the breaker.

[0010] A shutoff method according to an aspect of the present disclosure includes acquiring information on a power outage duration, which is a duration of a power outage that has occurred in a power grid, and turning off a contact unit of a breaker connected to the power grid when an instruction signal for turning off the contact unit is received from an external device after the power outage duration exceeds a predetermined threshold time. 。

[0011] A program according to one embodiment of the present disclosure causes one or more processors to execute the blocking method. Effect of the Invention

[0012] The present disclosure has an advantage in that it makes it possible to prevent a situation in which power is restored to a breaker when no one is around after a power outage occurs due to a disaster. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is an explanatory diagram showing a schematic configuration of an interruption system according to an embodiment of the present disclosure and a distribution board in which the interruption system is used. [Diagram 2] FIG. 2 is an explanatory diagram of the distribution board as viewed from the front with the cover removed. [Diagram 3] FIG. 3 is a flowchart illustrating the operation of the shutdown system. [Figure 4] FIG. 4 is a time chart for explaining an example of the operation of the above-mentioned interruption system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, the interruption system 10, the breaker 20, the distribution board 80, the interruption method, and the program according to the embodiment will be described with reference to the attached drawings. However, the following embodiments are only a part of various embodiments of the present disclosure. The following embodiments can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. In addition, each figure described in the following embodiments is a schematic diagram, and the size and thickness ratio of each component in the figure does not necessarily reflect the actual dimensional ratio.

[0015] (1) Overview 1, the interruption system 10 of this embodiment is a system for controlling the interruption of a breaker 20, i.e., the OFF operation of a contact portion 21 of the breaker 20. In this embodiment, the interruption system 10 is held (housed) in a housing 22 of the breaker 20, and controls the interruption of the breaker 20. Also, in this embodiment, the breaker 20 is housed in a distribution board cabinet 81 of a distribution board 80 installed in facility F1.

[0016] In this embodiment, the tripping system 10 is provided in a main breaker 40 and controls the tripping of the main breaker 40. That is, the breaker 20 to be controlled by the tripping system 10 is the main breaker 40. The main breaker 40 is connected to a system power supply 90 and is supplied with power from the system power supply 90.

[0017] In this embodiment, a "facility" may include non-residential facilities such as stores, offices, factories, buildings, schools, welfare facilities, or hospitals, as well as residential facilities such as detached houses, apartment buildings, or individual dwelling units in apartment buildings. Non-residential facilities may also include theaters, movie theaters, public halls, amusement parks, complexes, department stores, hotels, inns, kindergartens, libraries, museums, art galleries, underground shopping malls, stations, and airports. Furthermore, in this disclosure, a "facility" may include not only buildings (structures), but also outdoor facilities such as stadiums, gardens, parking lots, grounds, and parks. In this embodiment, a detached house in which residents live will be described as an example of facility F1.

[0018] As shown in FIG. 1, the shutdown system 10 includes an acquisition unit 122 and a shutdown control unit 124.

[0019] The acquisition unit 122 acquires information on the power outage duration Tc, which is the duration of a power outage that occurred in the power grid 90. In this embodiment, a "power outage" refers to a state in which the supply (transmission) of power from the power grid 90 to the breaker 20 is stopped.

[0020] When the power outage duration Tc acquired by the acquisition unit 122 exceeds a predetermined threshold time Tth, the tripping control unit 124 turns off the contact unit 21 of the breaker 20. More specifically, when the power outage duration Tc exceeds the threshold time Tth, the tripping control unit 124 turns off the contact unit 21 (41) of the breaker 20 (main breaker 40) in which the tripping system 10 is provided. This causes the breaker 20 (main breaker 40) to be tripped.

[0021] For example, when a disaster (natural disaster) such as a typhoon, earthquake, or heavy rain occurs, residents of the facility F1 in which the distribution board 80 is installed may be away from the facility F1 to evacuate or go out. In this state (unmanned state), when the system power supply 90 experiences a power outage due to the disaster and then is restored, power supply to the breaker 20 will be resumed with no one around the breaker 20. In this case, even if some kind of trouble occurs due to the disaster in the breaker 20 or the load circuit connected to the breaker 20, it is difficult for the residents to deal with the trouble.

[0022] In this embodiment, as described above, when the power outage duration Tc exceeds the threshold time Tth, the interruption system 10 interrupts the breaker 20. Therefore, in the event of a disaster that causes a long-term power outage exceeding the threshold time Tth, the interruption system 10 interrupts the breaker 20. Therefore, even if the system power supply 90 is restored in a situation where the residents have evacuated from the facility F1 due to a disaster and the facility is unoccupied, the breaker 20 is interrupted, so that the supply of power to the breaker 20 is suppressed. In short, according to the interruption system 10 of this embodiment, it is possible to suppress a situation in which the power supply to the breaker 20 is resumed in a situation where there is no one around after the occurrence of a power outage due to a disaster. This makes it possible to prevent trouble that may occur when the power supply to the breaker 20 is resumed.

[0023] (2)Details Hereinafter, the circuit breaker system 10, the breaker 20, and the distribution board 80 of this embodiment will be described in more detail with reference to the drawings.

[0024] As described above, in this embodiment, the breaking system 10 is provided in the main breaker 40, and the main breaker 40 is housed in the distribution board cabinet 81 of the distribution board 80 (see FIG. 2).

[0025] (2.1) Distribution Board 1 and 2, the distribution board 80 includes a main breaker 40, a plurality of branch breakers 50, and a distribution board cabinet 81. The distribution board 80 further includes a seismic breaker 60 and a grid-connection breaker 65.

[0026] The main breaker 40 , the multiple branch breakers 50 , the earthquake-sensitive breaker 60 , and the interconnection breaker 65 are housed in a distribution board cabinet 81 as internal devices of the distribution board 80 .

[0027] The distribution board cabinet 81 includes a box-shaped body 82 (see FIG. 2) with an open front, and a cover that covers the front of the body 82. The cover is attached to the body 82 in a state in which it can move between a closed position and an open position. The closed position is a position in which the front of the body 82 is covered, and the open position is a position in which at least a portion of the front of the body 82 is not covered. In FIG. 2, the cover is omitted. The distribution board cabinet 81 is attached to a construction material (e.g., the wall 100 of a building). The distribution board cabinet 81 is provided at a height position that is out of reach of a child of average height, but is able to be operated by an adult of average height, for example.

[0028] As shown in Fig. 2, the distribution board cabinet 81 contains a main breaker 40, a plurality of branch breakers 50, a seismic breaker 60, and a grid-connection breaker 65. The main breaker 40, the plurality of branch breakers 50, the seismic breaker 60, and the grid-connection breaker 65 are attached to the body 82 directly or via mounting parts. Fig. 2 shows the arrangement of the main breaker 40, the plurality of branch breakers 50, the seismic breaker 60, and the grid-connection breaker 65 inside the distribution board cabinet 81, but these arrangements are only examples and can be changed as appropriate. In addition, the distribution board cabinet 81 also contains a measurement unit 70 for measuring the power supplied to the main breaker 40 and the power supplied to each of the plurality of branch breakers 50.

[0029] The main breaker 40 is disposed inside the distribution board cabinet 81 at a position slightly to the left of the center in the left-right direction. The main breaker 40 may be disposed at another position inside the distribution board cabinet 81, for example, at a position to the right of the center. The main breaker 40 includes a primary terminal 44, a secondary terminal, and a contact portion 41 (see FIG. 1) electrically connected between the primary terminal 44 and the secondary terminal. The main breaker 40 also includes a housing 42 that houses the contact portion 41. The primary terminal 44 is disposed on the front side of the housing 42. The main breaker 40 also includes an operating lever 43 on the front side of the housing 42 that is operated by a user to turn the contact portion 41 on or off. The main breaker 40 also includes a tripping circuit that turns off the contact portion 41 when an overcurrent such as a short-circuit current or an overload current flows through the contact portion 41. The tripping circuit includes, for example, an electromagnetic device including an exciting coil that constitutes part of the electric circuit in the main breaker 40. The main breaker 40 also includes a leakage current interruption mechanism that turns off the contact unit 41 when it detects a leakage state in which leakage current flows through the contact unit 41. The leakage current interruption mechanism includes, for example, a zero-phase current transformer (ZCT) for detecting an unbalanced current.

[0030] In the distribution board 80 of this embodiment, a single-phase three-wire system is assumed as the power distribution method, so that three single-phase three-wire incoming lines of a system power source 90 (commercial power source) are electrically connected to the primary side terminal 44 of the main breaker 40.

[0031] Furthermore, a conductive bar of a first voltage pole (L1 phase), a conductive bar of a second voltage pole (L2 phase), and a conductive bar of a neutral pole (N phase) are electrically connected to the secondary terminal of the main breaker 40. Each conductive bar is formed into an elongated plate shape that is long in the left-right direction from a conductive member, and is disposed in the distribution board cabinet 81 at a position to the right of the main breaker 40 in the center in the up-down direction.

[0032] The branch breakers 50 are arranged in a left-right line above and below the conductive bar of the neutral pole, with a plurality of branch breakers on each side. In this embodiment, as shown in Fig. 2, twelve branch breakers 50 are arranged in a left-right line above the conductive bar. Eleven branch breakers 50 are arranged in a left-right line below the conductive bar.

[0033] Each branch breaker 50 has a pair of primary terminals and a pair of secondary terminals. Each branch breaker 50 has a contact section 51 electrically connected between the primary terminals and the secondary terminals. Each branch breaker 50 also has a housing 52 that houses the contact section 51 therein. An operating lever 53 that is operated by a user to turn the contact section 51 on or off is provided on the front surface of the housing 52 of each branch breaker 50.

[0034] The branch breaker 50 is available for 100V and 200V. A pair of primary side terminals of the 100V branch breaker 50 is electrically connected to one of the conductive bars of the first voltage pole and the conductive bar of the second voltage pole, and to the conductive bar of the neutral pole. A pair of primary side terminals of the 200V branch breaker 50 is 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 terminals of the branch breakers 50. One or more electrical appliances 54 such as lighting fixtures and hot water supply equipment, wiring appliances such as outlets 55 (see FIG. 1) or wall switches are connected to the wiring connected to the secondary side terminals of each branch breaker 50 as loads. Therefore, the distribution board 80 can supply power to the electrical appliances 54 connected to the secondary side terminals of the branch breakers 50 via wiring, or the electrical appliances 56 (e.g., air conditioners or television receivers) connected to the outlets 55.

[0035] The branch breaker 50 is equipped with a tripping circuit that turns off the contact unit 51 when an overcurrent such as a short circuit current or an overload current flows through the contact unit 51. The tripping circuit includes, for example, an electromagnetic device including an exciting coil that constitutes part of the electric circuit inside the branch breaker 50. The branch breaker 50 also includes a leakage current interruption mechanism that turns off the contact unit 51 when a leakage current state in which a leakage current flows through the contact unit 51 is detected.

[0036] The seismic breaker 60 is arranged below the conductive bar so as to be aligned with the branch breaker 50 in the left-right direction. The seismic breaker 60 has a seismic sensor 61 that detects vibrations applied to the distribution board cabinet 81. When the seismic sensor 61 detects vibrations exceeding a predetermined reference value (for example, earthquake motion of seismic intensity 5), the seismic breaker 60 performs a cut-off operation to cut off the circuit. The seismic breaker 60 generates a pseudo earth leakage state by, for example, electrically connecting 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 60 generates a pseudo earth leakage state, the earth leakage interruption mechanism of the main breaker 40 detects the pseudo earth leakage state generated by the seismic breaker 60 and turns off the contact unit 41. As a result, when vibrations exceeding the reference value are applied to the distribution board cabinet 81 due to an earthquake or the like, it is possible to cut off the power supply to the circuit connected to the secondary side of the main breaker 40.

[0037] A distributed power source 57 provided in the facility F1 is connected to the grid breaker 65. The distributed power source 57 may include, for example, a storage battery, a solar power generation facility, etc. The grid breaker 65 is electrically connected between a conductive bar electrically connected to a secondary terminal of the main breaker 40 and the distributed power source 57. When the contact portion of the grid breaker 65 is turned on, the distributed power source 57 is connected to the grid power source 90 to supply power to the load. On the other hand, when the contact portion of the grid breaker 65 is turned off, the distributed power source 57 is disconnected from the grid power source 90.

[0038] (2.2) Shutdown System As described above, in this embodiment, the interruption system 10 is provided in the main breaker 40 .

[0039] As shown in FIG. 1, the interruption system 10 includes a detection unit 11, a processing unit 12, a display unit 13, a communication unit 14, a setting unit 15, a reset unit 16, and a power supply unit 17.

[0040] The detection unit 11 detects power information related to the occurrence of a power outage in the system power supply 90. Here, the detection unit 11 includes a current sensor that detects a current flowing through an electric circuit in the main breaker 40. The current sensor is selected from, for example, a Rogowski coil, a current transformer, a Hall element, a magnetic resistance element such as a GMR (Giant Magnetic Resistances) element, a shunt resistor, and the like. The detection unit 11 transmits the detected power information (information on a current value) to the processing unit 12. Note that the detection unit 11 is not limited to a current sensor, and may be another sensor such as a voltage sensor, as long as it can detect power information related to the occurrence of a power outage in the system power supply 90.

[0041] The processing unit 12 includes, for example, a computer system. The computer system is mainly composed of a processor and a memory as hardware. The processor executes a program recorded in the memory of the computer system, thereby realizing the functions of the processing unit 12. The program may be pre-recorded in the memory of the computer system, may be provided through a telecommunication line, or may be recorded and provided on a non-transitory recording medium such as a memory card, an optical disk, or a hard disk drive that is readable by the computer system.

[0042] The processing unit 12 includes a power outage determination unit 121, an acquisition unit 122, a cutoff determination unit 123, and a cutoff control unit 124. Note that the power outage determination unit 121, the acquisition unit 122, the cutoff determination unit 123, and the cutoff control unit 124 do not indicate actual configurations, but indicate functions realized by the processing unit 12.

[0043] The power outage determination unit 121 determines whether a power outage has occurred in the system power supply 90 based on the power information transmitted from the detection unit 11. The power outage determination unit 121 determines whether a power outage has occurred by, for example, comparing the current value detected by the detection unit 11 with a predetermined threshold value. Specifically, when the current value (effective value) transmitted from the detection unit 11 is equal to or greater than the threshold value, the power outage determination unit 121 determines that power is being supplied from the system power supply 90 (no power outage has occurred in the system power supply 90). On the other hand, when the current value (effective value) transmitted from the detection unit 11 is less than the threshold value, the power outage determination unit 121 determines that the supply of power from the system power supply 90 has stopped (a power outage has occurred in the system power supply 90).

[0044] The acquisition unit 122 acquires information on the power outage duration Tc, which is the duration of a power outage that has occurred in the power system 90. The acquisition unit 122 acquires the information on the power outage duration Tc based on the determination result of the power outage determination unit 121 here.

[0045] The acquisition unit 122 includes a timer 1221. The acquisition unit 122 starts the timer 1221 to measure time, for example, when the power outage determination unit 121 determines that a power outage has occurred in the system power source 90. The acquisition unit 122 ends the timer 1221 to measure time when the power outage determination unit 121 determines that the power outage in the system power source 90 has ended (power has been restored). The acquisition unit 122 acquires the time measured by the timer 1221 as the power outage duration Tc. In short, the acquisition unit 122 includes the timer 1221 that measures time from the time when a power outage occurred in the system power source 90.

[0046] The tripping determination unit 123 determines whether or not tripping of the breaker 20 (main breaker 40) is necessary based on the information on the power outage duration Tc acquired by the acquisition unit 122. The tripping determination unit 123 compares the power outage duration Tc with a threshold time Tth. When the power outage duration Tc exceeds the threshold time Tth, the tripping determination unit 123 determines that tripping of the breaker 20 is necessary (the breaker 20 should be tripped). When the power outage duration Tc exceeds the threshold time Tth (determining that tripping of the breaker 20 is necessary), the tripping determination unit 123 sets a tripping flag.

[0047] The tripping control unit 124 trips the breaker 20 (main breaker 40) based on the determination result of the tripping determination unit 123. When the tripping determination unit 123 determines that the tripping of the breaker 20 is necessary, the tripping control unit 124 trips the breaker 20. When the tripping determination unit 123 determines that the tripping of the breaker 20 is necessary, the tripping control unit 124 trips the breaker 20 after the end of a power outage of the system power supply 90 (after power is restored). Specifically, when power is restored after a power outage, if a tripping flag is set, the tripping control unit 124 trips the breaker 20. In short, when the power outage duration Tc exceeds the threshold time Tth, the tripping control unit 124 turns off the contact unit 21 (41) of the breaker 20 (main breaker 40) connected to the system power supply 90. For example, the tripping control unit 124 operates a tripping circuit of the main breaker 40 to turn off the contact unit 41.

[0048] The display unit 13 is provided on the front of the housing 22 (42) of the breaker 20 (main breaker 40). The display unit 13 includes a display device such as a liquid crystal display or an organic EL (Electro Luminescence) display. The display unit 13 displays various information to the user under the control of the processing unit 12. Note that the display unit 13 is not shown in FIG. 2.

[0049] The information displayed by the display unit 13 may include information indicating that the power outage duration Tc has exceeded the threshold time Tth, which allows the user to understand that the power outage duration Tc has exceeded the threshold time Tth, i.e., that a long-term power outage has occurred in the system power supply 90.

[0050] The information displayed by the display unit 13 may include information on the cause of the tripping of the breaker 20 (main breaker 40). For example, when the breaker 20 is tripped due to the operation of the tripping circuit, the display unit 13 displays the character string "overuse" to notify the user that the breaker 20 has been tripped due to an overcurrent (overuse of electricity). For example, when the breaker 20 is tripped due to the operation of a leakage current interrupter mechanism, the display unit 13 displays the character string "earth leakage" to notify the user that the breaker 20 has been tripped due to the occurrence of an earth leakage. For example, when the breaker 20 is tripped by the tripping control unit 124 due to the power outage duration Tc exceeding the threshold time Tth, the display unit 13 displays the character string "power outage" to notify the user that the breaker 20 has been tripped due to the occurrence of a power outage in the system power supply 90. This allows the user to understand the cause of the tripping of the breaker 20 by looking at the display content of the display unit 13.

[0051] In short, the interruption system 10 includes a display unit 13 that displays information indicating that the power outage duration Tc has exceeded the threshold time Tth when the power outage duration Tc has exceeded the threshold time Tth.

[0052] The communication unit 14 is configured to be able to communicate with an external device. The communication unit 14 transmits and receives signals to and from the external device directly or indirectly via a network or a repeater, etc., by an appropriate communication method such as wired communication or wireless communication. The external device is, for example, an information terminal (smartphone, tablet terminal, etc.) owned by the user. Alternatively, the external device may be a measurement unit 70, a server device, etc.

[0053] The information transmitted from the communication unit 14 to the external device may include information indicating that the breaker 20 has been tripped for some reason. The information transmitted from the communication unit 14 to the external device may include information on the cause of the tripping of the breaker 20.

[0054] Furthermore, the information transmitted by the communication unit 14 to the external device may include information indicating that the power outage duration Tc has exceeded the threshold time Tth. The external device that receives this information displays, on a display provided in the external device, a character string or the like indicating that the power outage duration Tc has exceeded the threshold time Tth. This allows the user of the external device to understand that the power outage duration Tc has exceeded the threshold time Tth, i.e., that a long-term power outage has occurred in the system power supply 90.

[0055] In short, the shutdown system 10 has a transmitting unit (communication unit 14) that transmits information indicating that the power outage duration Tc has exceeded the threshold time Tth to an external device via communication when the power outage duration Tc has exceeded the threshold time Tth.

[0056] The setting unit 15 sets the threshold time Tth. In this embodiment, the threshold time Tth is variable and is set (changed) by the setting unit 15. The setting unit 15 has an interface that accepts user operations, and sets the threshold time Tth in response to an operation input from the user. The interface of the setting unit 15 may be configured by a touch panel integrated with the display unit 13. Note that the setting unit 15 is not shown in FIG. 2.

[0057] Before the setting unit 15 sets the threshold time Tth (at the time of shipping the breaker 20), a default value is set for the threshold time Tth. The default value is, for example, 12 hours. However, the default value is not limited to this, and may be another value such as 8 hours or 24 hours.

[0058] The reset unit 16 resets the time measured by the timer 1221 .

[0059] In one example, the reset unit 16 resets the timer 1221 when a predetermined standby time has elapsed since the power outage determination unit 121 determined that the power outage of the system power source 90 has ended (power restoration) and the timer 1221 has finished timing. In one example, the reset unit 16 resets the timer 1221 when a reset button provided on the housing 22 (42) of the breaker 20 (main breaker 40) is operated by a user. In one example, the reset unit 16 resets the timer 1221 when the operation lever 43 of the breaker 20 (main breaker 40) is operated (for example, operated to turn on the contact unit 41). In one example, the reset unit 16 resets the timer 1221 when an instruction signal instructing to reset the timer 1221 is received from an external device via the communication unit 14.

[0060] By resetting the timer 1221, even if multiple short-term (e.g., less than 12 hours) power outages occur over a long period of time (e.g., one year), it becomes possible to compare the power outage duration Tc of each power outage with the threshold time Tth, rather than the cumulative power outage time.

[0061] The power supply unit 17 generates power for operating the interruption system 10. The power supply unit 17 includes a power conversion circuit and a battery. The power conversion circuit generates power for operating each part of the interruption system 10 using power from the system power supply 90 when the system power supply 90 is in a normal state (when there is no power outage). The battery supplies operating power to each part of the interruption system 10 when the system power supply 90 is in an emergency state (when there is a power outage). The battery supplies operating power to at least the detection unit 11 and the processing unit 12. Here, the battery does not supply power to the tripping circuit.

[0062] (3) Operation An example of the operation of the shutdown system 10 will now be described with reference to the flowchart of FIG.

[0063] The processing unit 12 (power failure determination unit 121) determines whether or not a power failure has occurred in the system power supply 90 based on the detection result (power information) of the detection unit 11 (ST1). If a power failure has occurred (ST1: Yes), the processing unit 12 (acquisition unit 122) starts counting the time of the timer 1221 (ST2).

[0064] The processing unit 12 (shutdown determination unit 123) determines whether or not the time (power outage duration Tc) measured by the timer 1221 exceeds the threshold time Tth (ST3). If the power outage duration Tc exceeds the threshold time Tth (ST3: Yes), the processing unit 12 (shutdown determination unit 123) sets a shutdown flag (ST4). In addition, the processing unit 12 (power outage determination unit 121) determines whether or not the power outage of the system power supply 90 has ended (power has been restored) (ST5).

[0065] When the power outage ends (ST5: Yes), the processing unit 12 (shutdown control unit 124) determines whether or not the shutdown flag is set at the time of the power outage end (ST6). If the shutdown flag is set (ST6: Yes), the processing unit 12 (shutdown control unit 124) operates the tripping circuit to shut down the breaker 20. If the shutdown flag is not set (ST6: No), the processing unit 12 maintains the breaker 20 in a conductive state (ST8).

[0066] In the following, a specific operation example of the interruption system 10 in particular when a disaster occurs and a long-term power outage occurs in the power grid 90 will be described with reference to the time chart of Fig. 4. In this operation example, it is assumed that a power outage occurs in the power grid 90 in a situation where the residents of the facility F1 have evacuated due to a typhoon as a disaster.

[0067] At time t1, residents evacuate from facility F1 based on typhoon evacuation information, etc. At this time, the power grid 90 is not affected by a power outage, and the contacts 21 of the breaker 20 are also turned on. Therefore, the supply of power to the loads in facility F1 is maintained.

[0068] At time t2, a power outage occurs in the system power supply 90. At this time, the processing unit 12 starts the timer 1221 to measure time based on the determination result of the power outage determination unit 121. At this time, although the contact unit 21 of the breaker 20 is kept on, the power supply to the load is stopped because the system power supply 90 is experiencing a power outage. In addition, the communication unit 14 transmits information indicating the occurrence of a power outage to an external device (such as an information terminal) by communication.

[0069] At time t3, when the time counted by the timer 1221 (power failure duration Tc) exceeds the threshold time Tth, the processing unit 12 sets a shutoff flag indicating that the power failure duration Tc has exceeded the threshold time Tth.

[0070] At time t4, when the power outage of the system power supply 90 ends (power is restored), the supply of power from the system power supply 90 to the breaker 20 is resumed, and the supply of power to the load is also resumed. At this time, based on the fact that the cutoff flag is set, the processing unit 12 operates the tripping circuit to turn off the contact unit 21 of the breaker 20. As a result, the supply of power to the load is cut off again (time t5).

[0071] After that, at time t6, the resident returns home to the facility F1, and after confirming the safety inside the facility F1, the resident operates the operation lever of the breaker 20 to turn on the contact unit 21 again. This restarts the supply of power from the system power supply 90 to the load (time t7).

[0072] In this manner, according to the interruption system 10 of the present embodiment, when the power outage duration Tc exceeds the threshold time Tth, the contact unit 21 (41) of the breaker 20 (main breaker 40) is turned off. That is, after a long-term power outage that exceeds the threshold time Tth occurs due to a disaster, the breaker 20 is interrupted by the interruption system 10. Therefore, it is possible to prevent a situation in which power supply to the breaker 20 is resumed when no one is around after a power outage occurs due to a disaster.

[0073] (4) Variations The above-described embodiment is merely one of various embodiments of the present disclosure. The above-described embodiment can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. In addition, the same function as the shutdown system 10 may be embodied in a shutdown method, a (computer) program, or a non-transitory recording medium on which a program is recorded, etc.

[0074] A shutoff method according to one embodiment includes acquiring information on a power outage duration Tc, which is the duration of a power outage that has occurred in a power system 90, and turning off a contact portion 21 of a breaker 20 connected to the power system 90 when the power outage duration Tc exceeds a predetermined threshold time Tth.

[0075] A program according to one aspect is a program for causing one or more processors to execute the above-described blocking method.

[0076] Modifications of the embodiment are listed below. The modifications described below can be applied in appropriate combination.

[0077] The interruption system 10 in the present disclosure includes a computer system in the processing unit 12, etc. The computer system is mainly composed of a processor and a memory as hardware. The processor executes a program recorded in the memory of the computer system, thereby realizing the function of the processing unit 12 in the present disclosure. The program may be pre-recorded in the memory of the computer system, may be provided through an electric communication line, or may be provided by being recorded in a non-transitory recording medium such as a memory card, an optical disk, or a hard disk drive that can be read by the computer system. The processor of the computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). The integrated circuits such as IC or LSI referred to here are called by different names depending on the degree of integration, and include integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). Furthermore, a field-programmable gate array (FPGA) that is programmed after the manufacture of the LSI, or a logic device that can reconfigure the connection relationship inside the LSI or reconfigure the circuit partition inside the LSI, can also be adopted as a processor. The electronic circuits may be integrated in one chip or distributed among multiple chips. The chips may be integrated in one device or distributed among multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Thus, the microcontroller is also composed of one or more electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

[0078] Furthermore, it is not essential for the shutdown system 10 that the multiple functions of the processing unit 12 are concentrated in one housing, and each component of the processing unit 12 may be distributed across multiple housings. At least some of the functions of the processing unit 12 and the like in the shutdown system 10 may be realized by, for example, a server or a cloud (cloud computing).

[0079] In one modified example, the tripping control unit 124 may trip the breaker 20 only when an instruction to trip the breaker 20 is received from the user. For example, when the tripping flag is set, the tripping control unit 124 transmits an inquiry signal to the user's information terminal via the communication unit 14 at that time (or when power is restored) to inquire whether the tripping of the breaker 20 is necessary. Then, when the tripping control unit 124 receives an instruction signal to trip the breaker 20 from the user's information terminal, the tripping control unit 124 trips the breaker 20. In short, the tripping system 10 may include a receiving unit (communication unit 14) that receives an instruction signal to turn off the contact unit 21 from an external device. The tripping control unit 124 may turn off the contact unit 21 when the receiving unit receives an instruction signal after the power outage duration Tc exceeds the threshold time Tth. Note that the tripping control unit 124 may trip the breaker 20 when it does not receive a refusal signal to refuse to trip the breaker 20 even after a predetermined time has elapsed since the transmission of the inquiry signal.

[0080] In one modified example, the breaker 20 to be controlled by the shutoff system 10 is not limited to the main breaker 40 and may be a branch breaker 50 or the like. For example, the shutoff system 10 may be provided in at least one of the multiple branch breakers 50, and control shutoff of the branch breaker 50 in which the shutoff system 10 is provided. In this case, it is preferable that the shutoff system 10 shuts off all of the multiple branch breakers 50 provided in the distribution board 80.

[0081] In one modified example, the interruption system 10 may not be provided in the breaker 20. For example, the interruption system 10 may be arranged outside the breaker 20 inside the distribution board cabinet 81. For example, the interruption system 10 may be provided in the measurement unit 70. Alternatively, the interruption system 10 may be arranged outside the distribution board cabinet 81. For example, the interruption system 10 may be provided in a server device. For example, the interruption control unit 124 may transmit an appropriate instruction signal to the breaker 20 to operate the tripping circuit, or may supply a pseudo earth leakage signal to the breaker 20 to turn off the contact unit 21 of the breaker 20.

[0082] In one modified example, the number of breakers 20 controlled by the tripping system 10 is not limited to one, and two or more breakers 20 selected from the trunk breaker 40 and a plurality of branch breakers 50 may be controlled by one tripping system 10. In this case, the tripping system 10 may be disposed in the breaker 20 to be controlled, or may be disposed outside the breaker 20.

[0083] In the above embodiment, the processing unit 12 (power outage determination unit 121) determines that a power outage has occurred when the power supply from the grid power source 90 has stopped even if the power supply from the distributed power source 57 continues, but this is not limited to the above. In one modified example, the interruption system 10 may determine that a power outage has occurred when the power supply from both the grid power source 90 and the distributed power source 57 has stopped.

[0084] In one modified example, the "power failure duration Tc" may be the sum of a plurality of discontinuous power failure times. The plurality of power failure times accumulated as a single power failure duration Tc may be, for example, consecutive power failure times spaced apart by an interval less than the waiting time for the reset unit 16 to reset the timer 1221.

[0085] In one modified example, the power failure determination unit 121 may determine the occurrence of a power failure based on power information from a source other than the detection unit 11. For example, the power information may be a current value of the main current measured by the measurement unit 70.

[0086] In one modified example, the acquisition unit 122 may not include the timer 1221. The acquisition unit 122 may acquire information on the power outage duration Tc based on, for example, the difference between the time when the power outage occurred and the time when the power outage ended (the time when power was restored) stored in the memory.

[0087] In one modified example, the processing unit 12 may not include the power outage determination unit 121. For example, the acquisition unit 122 may acquire information on the time when a power outage occurred and information on the time when the power outage ended from an external device or the like, or may acquire information on the power outage duration Tc itself from an external device or the like.

[0088] In one modified example, the cutoff control unit 124 may turn off the contact unit 21 by a method other than activating a tripping circuit. For example, the cutoff control unit 124 may turn off the contact unit 21 by activating a leakage current interrupter mechanism.

[0089] In one modified example, the display unit 13 is not limited to a display device such as a display. For example, the display unit 13 may be an indicator light that displays information by turning on / off, a screen that displays information by changing color, or the like.

[0090] In one modified example, the shutdown system 10 may include, instead of or in addition to the display unit 13, a voice notification unit that notifies by voice information indicating that the power outage duration Tc has exceeded the threshold time Tth.

[0091] In one modified example, the cutoff control unit 124 may turn off the contact unit 21 of the breaker 20 at the time when the cutoff flag is set (or a predetermined time after that), without waiting for the end of the power outage (power restoration) of the system power supply 90.

[0092] (5) Description The following aspects are disclosed from the above-described embodiment and modified examples.

[0093] The first embodiment of the shutdown system (10) includes an acquisition unit (122) and a shutdown control unit (124). The acquisition unit (122) acquires information on a power outage duration (Tc) that is the duration of a power outage that has occurred in a power grid (90). When the power outage duration (Tc) exceeds a predetermined threshold time (Tth), the shutdown control unit (124) turns off a contact unit (21) of a breaker (20) connected to the power grid (90).

[0094] According to this embodiment, it is possible to prevent a situation in which, after a power outage occurs due to a disaster, power supply to the breaker (20) is resumed when no one is around.

[0095] The shutdown system (10) of the second aspect is the same as the first aspect, and further includes a display unit (13). When the power outage duration (Tc) exceeds the threshold time (Tth), the display unit (13) displays information indicating that the power outage duration (Tc) has exceeded the threshold time (Tth).

[0096] According to this embodiment, the user can know that a long-term power outage has occurred in the power supply system (90) by checking the display unit (13).

[0097] The shutdown system (10) of the third aspect is the first or second aspect, further including a transmission unit (communication unit 14). When the power outage duration (Tc) exceeds the threshold time (Tth), the transmission unit transmits information indicating that the power outage duration (Tc) has exceeded the threshold time (Tth) to an external device via communication.

[0098] According to this embodiment, the user can know that a long-term power outage has occurred in the power supply system (90) by checking the external device.

[0099] The shutdown system (10) of the fourth aspect is any one of the first to third aspects, and further includes a receiver (communication unit 14). The receiver receives an instruction signal from an external device to instruct the shutdown of the contact unit (21). When the receiver receives the instruction signal after the power outage duration (Tc) exceeds the threshold time (Tth), the shutdown control unit (124) turns off the contact unit (21).

[0100] According to this embodiment, it is possible to turn off the breaker (20) in response to a command signal from an external device.

[0101] The cutoff system (10) of a fifth aspect is any one of the first to fourth aspects, further including a setting unit (15). The setting unit (15) sets a threshold time (Tth).

[0102] According to this embodiment, it is possible to change the setting of the threshold time (Tth) depending on, for example, the area where the breaker (20) is installed.

[0103] In the sixth aspect of the shutdown system (10) in any one of the first to fifth aspects, the acquisition unit (122) includes a timer (1221) that measures the time from the occurrence of a power outage in the system power supply (90).

[0104] According to this embodiment, the power outage duration (Tc) can be easily obtained by the timer (1221).

[0105] The cutoff system (10) of the seventh aspect is the sixth aspect, further including a reset unit (16). The reset unit (16) resets the time measured by the timer (1221).

[0106] According to this aspect, even if short-term power outages occur multiple times over a long period of time, it is possible to compare the power outage duration (Tc) for each power outage with the threshold time (Tth).

[0107] A breaker (20) of an eighth aspect includes the interruption system (10) of any one of the first to seventh aspects, a contact unit (21), and a housing. The housing holds an acquisition unit (122), an interruption control unit (124), and the contact unit (21).

[0108] According to this embodiment, it is possible to prevent a situation in which, after a power outage occurs due to a disaster, power supply to the breaker (20) is resumed when no one is around.

[0109] A distribution board according to a ninth aspect includes the circuit breaker system (10) according to any one of the first to seventh aspects, and a distribution board cabinet (81) that houses a breaker (20).

[0110] According to this embodiment, it is possible to prevent a situation in which, after a power outage occurs due to a disaster, power supply to the breaker (20) is resumed when no one is around.

[0111] The shutoff method of the tenth aspect includes acquiring information on a power outage duration (Tc) that is the duration of a power outage occurring in a power grid (90), and turning off a contact portion (21) of a breaker (20) connected to the power grid (90) when the power outage duration (Tc) exceeds a predetermined threshold time (Tth).

[0112] According to this embodiment, it is possible to prevent a situation in which, after a power outage occurs due to a disaster, power supply to the breaker (20) is resumed when no one is around.

[0113] A program according to an eleventh aspect causes one or more processors to execute the shutdown method according to the tenth aspect.

[0114] According to this embodiment, it is possible to prevent a situation in which, after a power outage occurs due to a disaster, power supply to the breaker (20) is resumed when no one is around. [Explanation of symbols]

[0115] 10. Shutdown System 122 Acquisition Department 1221 Timer 124 Shutdown control section 13 Display section 14 Communication unit (transmitter, receiver) 15 Setting section 16 Reset section 20 Breaker 21 Contact part 80 Distribution Board 81 Distribution cabinet 90 Grid power supply Tc Power outage duration Tth Threshold time

Claims

1. An acquisition unit that acquires information on a power outage duration, which is the duration of a power outage that has occurred in a power grid; When the power outage duration exceeds a predetermined threshold time, a cutoff control unit turns off a contact of a breaker connected to the system power supply; a receiving unit that receives an instruction signal from an external device to instruct the contact unit to be turned off; Equipped with The cutoff control unit turns off the contact unit when the receiving unit receives the instruction signal after the power outage duration exceeds the threshold time. Shutdown system.

2. The acquisition unit includes a timer that measures a time from a time point when a power outage occurred in the power system. The isolation system of claim 1 .

3. Further comprising a reset unit that resets the time measured by the timer. The isolation system of claim 2 .

4. Further comprising a display unit that displays information indicating that the power outage duration has exceeded the threshold time when the power outage duration has exceeded the threshold time. The blocking system according to any one of claims 1 to 3.

5. The power failure detection device further includes a transmission unit that transmits information indicating that the power failure duration has exceeded the threshold time to an external device via communication when the power failure duration has exceeded the threshold time. An isolation system according to any one of claims 1 to 4.

6. Further comprising a setting unit that sets the threshold time. An isolation system according to any one of claims 1 to 5.

7. An interruption system according to any one of claims 1 to 6, The contact portion; a housing for holding the acquisition unit, the cutoff control unit, and the contact unit; Equipped with breaker.

8. An interruption system according to any one of claims 1 to 6, A distribution board cabinet that houses the breaker; Equipped with Distribution board.

9. Acquiring information on a power outage duration, which is the duration of a power outage that has occurred in a power grid; When an instruction signal for instructing to turn off a contact portion of a breaker connected to the system power supply is received from an external device after the power failure duration exceeds a predetermined threshold time, the contact portion is turned off. Including, Blocking method.

10. A program for causing one or more processors to execute the blocking method described in claim 9.

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