JP2021100355A - Leakage detection system, automatic maintenance and inspection system, and leakage detection method - Google Patents

Abstract

To provide a leakage detection system capable of reducing labor of inspection work of consumer equipment, an automatic maintenance and inspection system, and a leakage detection method.SOLUTION: A leakage detection system X1 includes a leakage detection unit (zero-phase current transformer 30) and a communication unit 7. The leakage detection unit detects leakage between a branch breaker 2 and a responsibility demarcation point 102 of consumer equipment E1 including the installed branch breaker 2. The communication unit 7 outputs a piece of inspection information. The inspection information includes the information on the leakage detected by the leakage detection unit.SELECTED DRAWING: Figure 1

Description

The present disclosure generally relates to an earth leakage detection system, an automatic maintenance inspection system and an earth leakage detection method, and more specifically, an earth leakage detection system, an automatic maintenance inspection system and an automatic maintenance inspection system for detecting an earth leakage between a branch breaker and a demarcation point of responsibility. Regarding the leakage amount detection method.

The earth leakage breaker (leakage amount detection system) described in Patent Document 1 includes a zero-phase current transformer, an earth leakage detection circuit, and an earth leakage display member. The leakage detection circuit detects the occurrence of leakage based on the detection current input from the secondary output line of the zero-phase current transformer. The earth leakage display member displays an earth leakage detection state and a non-leakage detection state.

Japanese Unexamined Patent Publication No. 2010-251251

For equipment such as consumer equipment in which the earth leakage breaker described in Patent Document 1 is installed, periodic inspections are carried out at a frequency of once every four years or the like. The worker performs the following inspection work, for example. Workers go to the installation location of the earth leakage breaker and check the display of the earth leakage display member to check for the occurrence of earth leakage. In addition, the worker measures the leakage current of the electric circuit using a clamp meter or the like. Then, it has been required to reduce the labor of such inspection work.

An object of the present disclosure is to provide an earth leakage amount detection system, an automatic maintenance inspection system, and an earth leakage amount detection method that can reduce the labor of inspection work of consumer equipment.

The earth leakage amount detection system according to one aspect of the present disclosure includes an earth leakage amount detection unit and a communication unit. The leakage amount detection unit detects the leakage amount between the branch breaker and the demarcation point of responsibility of the consumer equipment in which the branch breaker is installed. The communication unit outputs inspection information. The inspection information includes information on the amount of leakage detected by the leakage amount detection unit.

The automatic maintenance / inspection system according to one aspect of the present disclosure receives the inspection information from the communication unit of the leakage amount detection system.

The leakage amount detection method according to one aspect of the present disclosure includes a detection step and a notification step. In the detection step, the amount of leakage is detected between the branch breaker and the demarcation point of responsibility of the consumer equipment in which the branch breaker is installed. In the notification step, inspection information is output. The inspection information includes information on the amount of leakage detected in the detection step.

The present disclosure has an advantage that the labor of inspection work of customer equipment can be reduced.

FIG. 1 is a block diagram of a main breaker including an earth leakage detection system according to an embodiment, a distribution board including the main breaker, and a block diagram of consumer equipment including the distribution board. FIG. 2 is a block diagram of a main circuit breaker provided with the same leakage amount detection system. FIG. 3 is a front view of a distribution board provided with the same leakage amount detection system. FIG. 4 is a flowchart corresponding to an operation example of the above-mentioned leakage amount detection system.

Hereinafter, the leakage amount detection system X1 according to the embodiment will be described with reference to the drawings. However, the following embodiments are only one of the various embodiments of the present disclosure. The following embodiments can be variously modified according to the design and the like as long as the object of the present disclosure can be achieved. Further, FIG. 3 is a schematic view, and the ratio of the size and the thickness of each component in the figure does not necessarily reflect the actual dimensional ratio.

As shown in FIG. 1, the leakage amount detection system X1 of the present embodiment is provided in the main breaker 3. The leakage amount detection system X1 includes a zero-phase current transformer 30 (leakage amount detection unit) and a communication unit 7. The zero-phase current transformer 30 detects the amount of electric leakage between the branch breaker 2 and the demarcation point 102 of the consumer equipment E1 in which the branch breaker 2 is installed. The communication unit 7 outputs inspection information including information on the amount of leakage detected by the zero-phase current transformer 30.

According to this embodiment, the inspection information output from the communication unit 7 is acquired even if the worker does not go to the consumer equipment E1 in which the zero-phase current transformer 30 and the leakage amount detection system X1 are installed. Therefore, at least a part of the inspection work of the consumer equipment E1 can be replaced. Therefore, it is possible to reduce the time and effort required for the inspection work of the consumer equipment E1.

As described above, the leakage amount detection system X1 is provided in the main breaker 3. That is, in the present embodiment, the earth leakage breaker is adopted as the main breaker 3. The zero-phase current transformer 30 (leakage amount detection unit) is provided in the main breaker 3 (leakage breaker). In the present embodiment, the service line 200, the connecting line 201 in the main circuit breaker 3, and the conductive bar 202 form the main line. The zero-phase current transformer 30 is provided on the main line (connecting line 201). That is, the zero-phase current transformer 30 detects the amount of electric leakage on the main line (connection line 201).

The main breaker 3 is provided in the distribution board 1. The distribution board 1 is installed in, for example, a house such as a detached house or an apartment house, or a non-house such as an office, a multi-tenant building, a factory, or a public facility.

As shown in FIG. 3, the distribution board 1 includes a cabinet 10, a main breaker 3, a plurality of branch breakers 2 (23 in FIG. 3, of which only 3 are shown in FIG. 1), and a measuring unit 41. A main current sensor CT1 (see FIG. 1), a current measuring device 42 (see FIG. 1), and a lightning arrester 43 are provided. The main circuit breaker 3, the plurality of branch breakers 2, the measuring unit 41, the main current sensor CT1, the current measuring device 42, and the lightning arrester 43 are housed in the cabinet 10. That is, the zero-phase current transformer 30 (leakage amount detection unit) of the main breaker 3 is arranged inside the cabinet 10 of the distribution board 1. The cabinet 10 includes a box-shaped body 12 having an open front surface and a cover covering the front surface of the body 12. The cover is attached to the body 12 so as to be movable between the closed position and the open position. The closed position is a position that covers the front surface of the body 12, and the open position is a position that opens at least a part of the front surface of the body 12. The cabinet 10 is mounted, for example, on the wall of the facility.

The main circuit breaker 3 includes three primary side terminals 31 and three secondary side terminals 32 (see FIG. 2). The main circuit breaker 3 includes three contacts C1 (see FIG. 2) connected to an electric circuit (connection line 201) between the three primary side terminals 31 and the three secondary side terminals 32. The main breaker 3 includes an operating lever 33 for turning on or off the three contacts C1. The operation lever 33 is arranged on the front surface of the main breaker 3. Further, the main breaker 3 includes an opening / closing mechanism portion 51 (see FIG. 2). The opening / closing mechanism 51 turns off the three contacts C1 when an abnormal state such as an electric leakage current or an overcurrent (overload current or the like) flows in the main breaker 3.

In the distribution board 1 of the present embodiment, a single-phase three-wire system is adopted as a power distribution system. Therefore, a single-phase three-wire type drop wire 200 is electrically connected to the three primary side terminals 31 of the main circuit breaker 3. The drop line 200 includes three electric wires. The three primary side terminals 31 are electrically connected to the system power supply PS1 (commercial power supply) (see FIG. 1) via the drop line 200. In the present embodiment, the drop wire 200 is directly connected to the three screw terminals 124 (connection terminals) arranged on the body 12 of the cabinet 10. The three screw terminals 124 and the three primary side terminals 31 of the main circuit breaker 3 are electrically connected via the three wiring members 125. It is not essential that the distribution board 1 is provided with the three screw terminals 124 and the three wiring members 125, and the drop line 200 may be directly connected to the three primary side terminals 31 of the main breaker 3.

As shown in FIG. 1, the drop line 200 is connected to the air switch 101. The system power supply PS1 and the main breaker 3 are electrically connected to each other via an aerial switch 101 and a drop line 200. The aerial switch 101 corresponds to the demarcation point 102 between the consumer equipment E1 on which the distribution board 1 of the present embodiment is installed and the electric power company.

Further, three conductive bars 202 are electrically connected to the three secondary side terminals 32 of the main circuit breaker 3. That is, the conductive bars of the first voltage pole (L1 phase), the conductive bars of the second voltage pole (L2 phase), and the conductive bars of the neutral pole (N phase) are electrically connected to the three secondary terminal 32s. Is connected.

The branch breaker 2 is available for 100V and 200V. The two primary side terminals included in the branch breaker 2 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. The two primary terminals included in the branch breaker 2 for 200V are electrically connected to the conductive bar of the first voltage pole and the conductive bar of the second voltage pole.

The distribution board 1 includes a plurality of circuits 8. Each circuit 8 includes a branch breaker 2 and is electrically connected to a trunk line (conductive bar 202) via the branch breaker 2.

The “circuit 8” referred to in the present disclosure is each of a branch circuit electrically connected to the main line (conductive bar 202) and branched into a plurality of branches from the main line (conductive bar 202). In this embodiment, the circuit 8 includes a wiring 81 (two lines), an outlet 82, and a load 83 in addition to the branch breaker 2. One end of the wiring 81 is electrically connected to the two secondary terminals of the branch breaker 2. The other end of the wiring 81 is electrically connected to the outlet 82. The outlet 82 and the load 83 are arranged outside the cabinet 10 of the distribution board 1. The load 83 is, for example, a device such as a lighting device, an air conditioner, a television receiver, or a hot water supply facility. The load 83 is electrically connected to the branch breaker 2 via the wiring 81 and the outlet 82. In at least a part of the circuits 8, the branch breaker 2 and the load 83 may be electrically connected to each other via a wiring device such as a wall switch instead of the outlet 82.

The measuring unit 41 is electrically connected to the main current sensor CT1 and the current measuring device 42. The main current sensor CT1 is, for example, a Rogowski coil or a current transformer. The main current sensor CT1 measures the current flowing through the main breaker 3. The current measuring device 42 has a plurality of current sensors CT2. Each of the plurality of current sensors CT2 is, for example, a Rogowski coil or a current transformer. The plurality of current sensors CT2 correspond one-to-one with the plurality of branch breakers 2. Each of the plurality of current sensors CT2 measures the current flowing through the corresponding branch breaker 2.

The measuring unit 41 has a function (measurement function) of calculating electric power based on the currents measured by the main current sensor CT1 and the plurality of current sensors CT2. More specifically, the measuring unit 41 converts each of the currents measured by the main current sensor CT1 and the plurality of current sensors CT2 into electric power (instantaneous electric power). The measuring unit 41 has a function of obtaining the data of the electric energy obtained by integrating the collected instantaneous power data over a predetermined time.

As described above, the main breaker 3 includes the leakage amount detection system X1. The leakage amount detection system X1 includes a zero-phase current transformer 30, a processing unit 6, and a communication unit 7. As shown in FIG. 2, the main breaker 3 further includes a test circuit 53. The test circuit 53 is a circuit for causing a pseudo electric leakage state in the trunk line.

The zero-phase current transformer 30 includes a toroidal core. Three connecting wires 201 penetrate through the hole in the center of the toroidal core as primary windings. Further, the lead wire 531 included in the test circuit 53 also penetrates through the hole in the center of the toroidal core as a primary winding. That is, the three connecting wires 201 as a part of the trunk wire and the auxiliary electric wire (lead wire 531) penetrate through the hole in the center of the toroidal core as a primary winding. The secondary winding of the zero-phase current transformer 30 is electrically connected to the processing unit 6.

No current is flowing through the lead wire 531 except during the leakage detection test. Here, a case other than the case of the leakage detection test will be described. When there is no electric leakage in the main line (leading line 200, connecting line 201 or conductive bar 202), the primary side current passing through the primary winding of the zero-phase current transformer 30 is in equilibrium, so that the zero-phase current transformer flows. No current flows through the secondary winding of the vessel 30. When an electric leakage occurs in the trunk line, an imbalance occurs in the primary side current passing through the primary winding of the zero-phase current transformer 30, so that a current flows in the secondary winding of the zero-phase current transformer 30. That is, the zero-phase current transformer 30 detects the amount of leakage and outputs a current corresponding to the amount of leakage from the secondary winding. The processing unit 6 acquires the current flowing through the secondary winding of the zero-phase current transformer 30. Further, the processing unit 6 outputs a signal including information on the acquired current magnitude (leakage amount) to the outside of the distribution board 1 via the communication unit 7.

As shown in FIG. 1, a repeater 91 is installed in the facility (customer equipment E1) in which the distribution board 1 is installed. The repeater 91 is installed outside the cabinet 10 of the distribution board 1. The repeater 91 relays the communication between the communication unit 7 of the main breaker 3 and the external device 93. The repeater 91 is, for example, a smart meter or an internet modem.

The communication unit 7 includes a communication interface for communicating with the repeater 91. The repeater 91 includes a communication interface for communicating with the communication unit 7 and the external device 93. The form of communication between the repeater 91 and the communication unit 7 and the form of communication between the repeater 91 and the external device 93 may be wired communication or wireless communication. In the present embodiment, the repeater 91 communicates with the communication unit 7 by wire and wirelessly communicates with the external device 93. In the present embodiment, the method of wireless communication between the repeater 91 and the external device 93 is wireless communication via the network 92 using radio waves as a medium. The method of wireless communication between the repeater 91 and the external device 93 is, for example, a specific low power radio station (a radio station that does not require a license) in the 920 MHz band, Wi-Fi (registered trademark), and Bluetooth (registered trademark). ) And other communication standards may be used for wireless communication using radio waves as a medium.

In order to suppress communication traffic with the communication unit 7 of the other plurality of distribution boards 1 and the smart meter, the communication unit 7 is, for example, with the communication unit 7 and the smart meter of the other plurality of distribution boards 1. Communication is performed, and the timing of communication is determined according to the communication status of the communication unit 7 of the other plurality of distribution boards 1 and the smart meter.

The communication unit 7 outputs inspection information to the external device 93 via the repeater 91. The inspection information includes information on the amount of leakage detected by the zero-phase current transformer 30. The unit of the amount of electric leakage output from the communication unit 7 is, for example, mA (milliampere) or A (ampere). Further, the processing unit 6 records the amount of electric leakage detected by the zero-phase current transformer 30 one by one. The communication unit 7 outputs information regarding the amount of leakage recorded in the processing unit 6.

The external device 93 is, for example, a server computer or a personal computer. The external device 93 is installed outside the site of the facility (customer equipment E1) in which the distribution board 1 is installed, for example. That is, the communication unit 7 outputs the inspection information to the external device 93 installed outside the facility (customer equipment E1) in which the distribution board 1 is installed via the repeater 91. In the present embodiment, the external device 93 is owned by a business operator (electric power company, electrical safety association, electrical construction association, etc.) that performs maintenance and inspection of the facility (customer equipment E1) in which the distribution board 1 is installed. It is assumed that. However, the external device 93 may be installed on the premises of the facility (customer equipment E1) in which the distribution board 1 is installed. Further, the external device 93 may be owned by, for example, the manager of the facility (customer equipment E1) in which the distribution board 1 is installed.

The repeater 91 is used as an automatic maintenance and inspection system that receives inspection information from the communication unit 7 of the leakage amount detection system X1. Further, the external device 93 is used as an automatic maintenance / inspection system that receives inspection information from the communication unit 7 of the leakage amount detection system X1.

As shown in FIG. 2, the processing unit 6 includes a determination unit 61, a calculation unit 62, and a counter 63. The processing unit 6 includes a computer system having one or more processors and memories. When the processor of the computer system executes the program recorded in the memory of the computer system, at least a part of the functions of the processing unit 6 are realized. The program may be recorded in a memory, provided through a telecommunication line such as the Internet, or may be recorded and provided on a non-temporary recording medium such as a memory card.

As will be described later, the determination unit 61 determines whether or not there is an abnormality in the consumer equipment E1 based on the inspection information. The consumer equipment E1 referred to here includes a distribution board 1. Therefore, the consumer equipment E1 includes a zero-phase current transformer 30. Further, the consumer equipment E1 may include a plurality of outlets 82 electrically connected to a plurality of branch breakers 2 of the distribution board 1 and a plurality of loads 83. Further, the distribution board 1 includes an interconnection breaker 44 (see FIG. 3). The three conductive bars 202 can be electrically connected to a distributed power source such as a photovoltaic power generation facility and a wind power generation facility, and a storage battery via an interconnection breaker 44. The consumer equipment E1 may include a distributed power source and a storage battery. Further, the consumer equipment E1 may include a repeater 91.

The inspection information includes information on the temperature of the configuration of the consumer equipment E1. This will be described below.

The distribution board 1 includes at least one temperature sensor 45. The temperature sensor 45 is, for example, a thermistor. In FIG. 1, temperature sensors 45 are arranged in the vicinity of the three primary side terminals 31 of the main circuit breaker 3, and the temperature sensors 45 detect the temperatures of the three primary side terminals 31. Further, temperature sensors 45 are arranged in the vicinity of the two primary side terminals of each of the plurality of branch breakers 2, and each temperature sensor 45 detects the temperature of the two primary side terminals. Further, a temperature sensor 45 is arranged inside each of the plurality of outlets 82, and each temperature sensor 45 detects the temperature inside the outlet 82. In this way, the temperature sensor 45 detects the temperatures of the primary side terminal 31, the primary side terminal of the branch breaker 2, and the outlet 82, which are the configurations of the consumer equipment E1. It should be noted that "detecting the temperature of the configuration of the consumer equipment E1" is not limited to detecting the temperature of the configuration of the consumer equipment E1 itself, and the air in the vicinity of the configuration of the consumer equipment E1 or the demand. It also includes detecting the temperature of the configuration in the vicinity of the configuration of the house equipment E1.

Information about the temperature detected by the temperature sensor 45 is output to the communication unit 7 of the main breaker 3. The communication unit 7 outputs information on the temperature as a part of the inspection information. That is, the communication unit 7 outputs inspection information including information on the temperature to the external device 93 via the repeater 91. In addition, the processing unit 6 records information about the temperature detected by the temperature sensor 45 one by one. The communication unit 7 outputs information about the temperature recorded in the processing unit 6.

Communication between the temperature sensor 45 installed near the branch breaker 2 or the outlet 82 and the communication unit 7 is, for example, wireless communication, power line carrier communication, or wired communication via a communication line provided separately from the power line. It is done by communication.

The distribution board 1 may include temperature sensors 45 arranged in the vicinity of the three secondary terminal 32s of the main circuit breaker 3. Further, the distribution board 1 may include a temperature sensor 45 arranged in the vicinity of the two secondary side terminals of the branch breaker 2. The communication unit 7 may output information on the temperature detected by these temperature sensors 45 as a part of the inspection information.

In each of the main circuit breaker 3 and the branch circuit breaker 2, the temperature sensor 45 arranged in the vicinity thereof detects a temperature rise due to poor contact between the primary side terminal or the secondary side terminal and the wiring. Further, the temperature sensor 45 arranged inside the outlet 82 detects a temperature rise due to poor contact between the outlet 82 and the plug, or an overcurrent flowing through the outlet 82.

Further, the calculation unit 62 (see FIG. 2) of the processing unit 6 of the main breaker 3 calculates the integrated value of the leakage amount detected by the zero-phase current transformer 30. The calculation unit 62, for example, integrates the amount of leakage detected by the zero-phase current transformer 30 over a predetermined period. The calculation unit 62 resets the integrated value at predetermined period intervals. Alternatively, the calculation unit 62 may always continue to integrate the amount of leakage detected by the zero-phase current transformer 30. Further, the calculation unit 62 may reset the integrated value when the reset signal is input. The reset signal may be input from the outside of the main circuit breaker 3 (for example, the external device 93), or may be generated by the main circuit breaker 3. The communication unit 7 outputs information regarding the integrated value of the leakage amount detected by the zero-phase current transformer 30 as a part of the inspection information. That is, the communication unit 7 outputs inspection information including information on the integrated value of the leakage amount detected by the zero-phase current transformer 30 to the external device 93 via the repeater 91.

Further, the lightning arrester 43 bypasses the surge current when a surge voltage equal to or higher than a predetermined voltage limit voltage is applied, and then shuts off the follow-on flow. The communication unit 7 of the main breaker 3 acquires the operation information of the lightning arrester 43 from the lightning arrester 43. The counter 63 (see FIG. 2) of the processing unit 6 counts the number of times the lightning arrester 43 bypasses the surge current. The communication unit 7 outputs the operation information of the lightning arrester 43 as a part of the inspection information. That is, the communication unit 7 outputs inspection information including the operation information of the lightning arrester 43 to the external device 93 via the repeater 91. The operation information of the lightning arrester 43 output from the communication unit 7 may include information on the number of times the lightning arrester 43 bypasses the surge current. Further, the operation information of the lightning arrester 43 output from the communication unit 7 may include real-time information as to whether or not the lightning arrester 43 is performing an operation of bypassing the surge current.

Communication between the lightning arrester 43 and the communication unit 7 is performed, for example, by wireless communication, power line carrier communication, or wired communication via a communication line provided separately from the power line.

As shown in FIG. 2, the test circuit 53 includes a lead wire 531 and a test switch 532. The lead wire 531 electrically connects the connection line 201 corresponding to the first voltage line and the connection line 201 corresponding to the second voltage line. The test switch 532 switches between the conductive state and the non-conducting state of the lead wire 531. The main breaker 3 has a test button 54 that receives a mechanical operation input by a worker. The test switch 532 is turned on in response to an operation input to the test button 54. When the test switch 532 is turned on, a current flows through the lead wire 531 to cause an imbalance in the primary side current passing through the primary winding of the zero-phase current transformer 30. That is, in the test circuit 53, when the test switch 532 is turned on by operating the test button 54, the connection line 201 corresponding to the first voltage line and the connection line 201 corresponding to the second voltage line are connected to the lead wire 531. And the test switch 532 are short-circuited. As a result, a current flows through the lead wire 531 (auxiliary wire) penetrating the toroidal core of the zero-phase current transformer 30, and an imbalance occurs in the primary side current passing through the primary winding of the zero-phase current transformer 30. In other words, a pseudo earth leakage condition occurs. In response to this, the opening / closing mechanism 51 opens the three contacts C1. That is, the electric circuit including the three connecting lines 201 is cut off.

Further, the main breaker 3 includes a drive switch 55. The drive switch 55 is electrically connected in parallel with the test switch 532. The drive switch 55 is turned on in response to a command signal from the processing unit 6. When the drive switch 55 is turned on, a pseudo electric leakage state occurs as in the case where the test switch 532 is turned on. The zero-phase current transformer 30 detects a pseudo electric leakage state, and the opening / closing mechanism 51 cuts off the electric circuit accordingly. In the main circuit breaker 3, the processing unit 6 transmits a command signal to the drive switch 55, so that an automatic test for electric leakage detection can be performed. In the present disclosure, the "automatic test" means a test performed on the electric circuit and the configuration around the electric wire without any work by a person such as a worker. The "automatic test" may be started by triggering the transmission of a command signal from the external device 93 to the main breaker 3 in response to a human operation on the external device 93. That is, in the "automatic test", the drive switch 55 is turned on in response to a command signal from the outside of the main breaker 3 (for example, a command signal transmitted from the external device 93 and input to the main breaker 3 via the communication unit 7). It may be done by being done. Further, the "automatic test" may be started without human operation.

The drive switch 55 is, for example, a semiconductor switching element. The drive switch 55 is switched on and off according to a drive signal as a command signal from the processing unit 6.

When the predetermined inspection condition is satisfied, the processing unit 6 turns on the drive switch 55 to cause a pseudo electric leakage state. The inspection condition is, for example, that a predetermined period elapses from the time when the drive switch 55 is finally turned on. That is, the main circuit breaker 3 periodically generates a pseudo-leakage state to perform a leakage detection test. In other words, the main breaker 3 periodically performs an automatic test for leakage detection.

When an electric leakage state is detected, the opening / closing mechanism 51 operates to shut off the electric circuit in principle, but when the processing unit 6 turns on the drive switch 55 and a pseudo electric leakage state occurs, the electric leakage state occurs. It is not essential that the opening / closing mechanism 51 cuts off the electric circuit. For example, when the processing unit 6 turns on the drive switch 55 and a pseudo electric leakage state occurs, instead of (or in addition) the opening / closing mechanism unit 51 performing an operation of shutting off the electric circuit, the processing unit 6 May detect the presence or absence of electric leakage based on the measured current of the zero-phase current transformer 30. That is, the automatic test for earth leakage detection includes, in addition to the earth leakage detection test in the zero-phase current transformer 30, a test for breaking operation of the electric circuit (main line), which is performed according to the test result of the earth leakage detection. Good.

Specific control for preventing the opening / closing mechanism 51 from shutting off the electric circuit when the processing unit 6 turns on the drive switch 55 and a pseudo electric leakage state occurs is as follows, for example. It is possible to control such as. That is, when the processing unit 6 turns on the drive switch 55 and a pseudo electric leakage state occurs, the signal (measured current information) from the zero-phase current transformer 30 is prevented from being transmitted to the electromagnetic release device 52. , Open the switch between the zero-phase current transformer 30 and the electromagnetic release device 52. In other cases, the above switch is short-circuited.

The predetermined period is, for example, one month, several months, one year, or several years. In Japan, the Electricity Business Law stipulates that maintenance and inspection of consumer equipment should be carried out at least once every four years. In order to meet the provisions of the Electricity Business Act, the predetermined period is set to, for example, 4 years or less.

As described above, in the main circuit breaker 3, the leakage detection test (automatic test) is performed without any command from the outside of the main circuit breaker 3. The communication unit 7 outputs the inspection information acquired by the automatic test. As described above, the inspection information output from the communication unit 7 includes information regarding the result of the automatic test for leakage detection. Further, the communication unit 7 periodically outputs the detection result of the zero-phase current transformer 30 when the automatic test is not performed. More specifically, in the communication unit 7, for example, every predetermined period (for example, one hour, several hours, or one day), information on the amount of leakage, or the amount of leakage of a predetermined amount or more is zero phase during the predetermined period. Information on whether or not it has been detected by the current transformer 30 is output.

In this way, the communication unit 7 has a function of actively outputting inspection information. Further, the communication unit 7 has a function of periodically outputting inspection information. Here, "actively outputting" means outputting without receiving a command or the like from the outside of the main breaker 3.

The main breaker 3 has an opening / closing mechanism portion 51, an electromagnetic release device 52, and two tripping devices 56.

When the contact C1 is closed, the opening / closing mechanism 51 is latched in a state of accumulating energy in the direction of opening the contact C1 (potential energy due to the elastic force of the spring). When either of the two tripping devices 56 and the electromagnetic release device 52 is driven, the latch of the opening / closing mechanism 51 is released. When the latch is released, the opening / closing mechanism 51 releases the stored energy to rapidly open the contact C1.

When an abnormal current (overcurrent) such as a short-circuit current flows through the trunk line, the two tripping devices 56 open the contact C1 via the opening / closing mechanism 51.

The electromagnetic release device 52 includes an electromagnet device including a coil and a plunger. The electromagnetic release device 52 attaches the coil to the coil when the main line is in an electric leakage state (including a pseudo electric leakage state) (when the current passing through the primary winding of the zero-phase current transformer 30 is unbalanced). The plunger is moved by passing an exciting current to release the latch of the opening / closing mechanism portion 51. As a result, the opening / closing mechanism 51 opens the contact C1.

Further, the operation lever 33 (see FIG. 3) opens and closes the contact C1 via the opening / closing mechanism portion 51 in response to a mechanical operation.

The determination unit 61 of the processing unit 6 determines whether or not there is an abnormality in the consumer equipment E1 based on the inspection information. The determination unit 61 determines, for example, whether or not there is an abnormality in the consumer equipment E1 by comparing the value included in the inspection information with the threshold value. The threshold value is recorded in the memory of the computer system constituting the processing unit 6. For example, when the amount of electric leakage detected by the zero-phase current transformer 30 is equal to or greater than the electric leakage amount threshold value, the determination unit 61 determines that an abnormality called electric leakage has occurred in the trunk line. Further, the determination unit 61 determines that, for example, when the temperature detected by the temperature sensor 45 is equal to or higher than the temperature threshold value, a high temperature abnormality has occurred at the installation position of the temperature sensor 45. Further, in the determination unit 61, for example, the leakage amount detected by the zero-phase current transformer 30 is less than the leakage amount threshold value, and the integrated value of the leakage amount detected by the zero-phase current transformer 30 in a predetermined period is predetermined. If it exceeds the value, it is judged that an abnormality called electric leakage (particularly minute electric leakage) has occurred in the trunk line. Further, the determination unit 61 acquires, for example, the current waveforms of the currents measured by the main current sensor CT1 and the plurality of current sensors CT2, and when the current waveform includes a predetermined arc, the wiring is abnormal (short-circuited or short-circuited). It is judged that a half-break, etc.) has occurred. Further, the determination unit 61 determines, for example, the presence or absence of an abnormality such as a power failure based on the measured value of the main voltage detected by the voltage sensor.

Further, determining whether or not there is an abnormality in the consumer equipment E1 includes determining whether or not there is an abnormality in the system power supply PS1 that affects the abnormality in the consumer equipment E1. The determination unit 61 may determine whether or not there is an abnormality in the system power supply PS1 by acquiring inspection information regarding an abnormality such as a power failure of the system power supply PS1 from a device or the like that monitors the system power supply PS1.

The communication unit 7 outputs the determination result of the determination unit 61 as a part of the inspection information. That is, the communication unit 7 outputs the inspection information including the determination result of the determination unit 61 to the external device 93 via the repeater 91. Further, the processing unit 6 records the determination result of the determination unit 61 one by one. The communication unit 7 outputs the determination result recorded in the processing unit 6.

The inspection information includes information on the inside of the cabinet 10 of the distribution board 1 and cabinet 10 of the distribution board 1 in addition to the information on the amount of leakage detected by the zero-phase current transformer 30. Includes off-board information, which is information detected outside of. An example of the information in the panel is information about the temperature detected by the temperature sensor 45 arranged in the vicinity of the main breaker 3 or the branch breaker 2, the operation information of the lightning arrester 43, the main current sensor CT1 and the plurality of current sensors CT2. Information on the current, information on the amount of electric power obtained by the measuring unit 41, and the like. An example of the off-board information is information on the temperature detected by the temperature sensor 45 arranged inside the outlet 82.

According to the leakage amount detection system X1 of the present embodiment described above, the operator performing maintenance and inspection measures the same information as the inspection information by acquiring the inspection information output from the communication unit 7. In addition, the time and effort required for the inspection work of the consumer equipment E1 can be reduced as compared with the case of acquiring by visual inspection or the like. Further, since it is not necessary for the worker to go to the installation location of the distribution board 1 or the like in order to acquire the inspection information, the labor of the inspection work of the consumer equipment E1 can be reduced. In addition, the business operator performing maintenance and inspection can acquire inspection information with high accuracy regardless of the proficiency level of inspection work for each worker.

Further, the distribution board 1 and the outlet 82 may be installed in the house, but even if the resident is absent and the worker cannot enter the house, the business operator performing the maintenance and inspection Inspection information can be obtained from the communication unit 7. Therefore, the possibility that the inspection work of the consumer equipment E1 can be executed increases.

(Modification example 1)
Hereinafter, the leakage amount detection system X1 according to the first modification will be described with reference to FIG. The same components as those in the embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the embodiment, the inspection information output from the communication unit 7 includes information on the temperature of the configuration of the consumer equipment E1 and the result of the automatic test of the leakage detection in the zero-phase current transformer 30. In this modification 1, the inspection information output from the communication unit 7 includes loosening of the screw terminal of the consumer equipment E1, discoloration of a specific part of the consumer equipment E1, and a specific space of the consumer equipment E1 (customer equipment). It also contains more information about odors in a specific space on the E1 site). That is, the inspection information output from the communication unit 7 is the temperature of the configuration of the consumer equipment E1, the result of the automatic test of the leakage detection in the zero-phase current transformer 30, the loosening of the screw terminal of the consumer equipment E1, and the consumer equipment. It may include information about discoloration of a specific part of E1 and at least one of odors in a specific space of consumer equipment E1. Hereinafter, a more detailed description will be given.

A screw terminal 124 (see FIG. 3) is used as each of the three connection terminals to which the drop wire 200 is directly connected. In addition to this, the screw terminals include, for example, the power supply terminal 441 (primary side terminal or secondary side terminal) of the interconnection breaker 44 (see FIG. 3), the primary side terminal 31, the secondary side terminal 32 of the main circuit breaker 3, and the secondary side terminal 32. It can be used as a primary side terminal and a secondary side terminal of the branch breaker 2.

The inspection information output from the communication unit 7 includes information regarding looseness of the screw terminals of the consumer equipment E1. In addition, the processing unit 6 records information on looseness of the screw terminals of the consumer equipment E1 one by one. The communication unit 7 outputs the information recorded in the processing unit 6.

The presence or absence of looseness of the screw terminal is detected, for example, by measuring the electric resistance value between two electric circuits connected via the screw terminal. The electric resistance value is obtained based on the measured values of the current flowing between the two electric circuits and the voltage applied between the two electric circuits. When the screw terminal is loose, the electric resistance value becomes larger than when the screw terminal is tightly tightened.

When the measured electric resistance value is larger than the predetermined value, the determination unit 61 of the processing unit 6 determines that the consumer equipment E1 has an abnormality such as loosening of the screw terminal.

Further, the inspection information output from the communication unit 7 includes information on discoloration of a specific portion of the consumer equipment E1 and information on the odor of the consumer equipment E1 in the specific space. In addition, the processing unit 6 records information on discoloration of a specific portion of the consumer equipment E1 and information on the odor of the consumer equipment E1 in the specific space one by one. The communication unit 7 outputs the information recorded in the processing unit 6.

The specific portion for which the presence or absence of discoloration is detected is, for example, a connection portion between electric wires or a resin molded product covering the connection portion. The specific space in which the odor is detected is, for example, a space in which an electric circuit and a connection portion between the electric wires are arranged. The connection portion between the electric wires and the resin molded product covering the connection portion may be discolored or smelled due to a temperature rise caused by poor contact between the electric wires and the electric wires. The connection portion between the electric circuit and the electric circuit is, for example, a terminal (for example, a screw terminal 124, a primary side terminal 31 and a secondary side terminal 32 of the main circuit breaker 3, and a primary side terminal and a secondary side terminal of the branch breaker 2) and the like. It is a blade holder of the outlet 82 and the like.

The presence or absence of discoloration is confirmed by, for example, a camera installed in advance. The processing unit 6 determines, for example, by performing image processing on an image taken by the camera, whether or not the object captured by the camera is discolored as compared with the normal time. The communication unit 7 outputs the determination result of the presence or absence of discoloration as a part of the inspection information.

Alternatively, the communication unit 7 may output an image taken by the camera as a part of the inspection information. The presence or absence of discoloration may be determined by the external device 93 receiving the inspection information analyzing the image taken by the camera, or the discoloration may be determined by a person visually checking the image displayed on the display of the external device 93. The presence or absence of is may be determined.

Odor detection is performed by, for example, an odor sensor. The odor is detected by the odor sensor, for example, by detecting a substance contained in the odor. The communication unit 7 outputs the detection result of the odor sensor as a part of the inspection information.

When the determination unit 61 of the processing unit 6 detects discoloration of a specific portion of the consumer equipment E1, it determines that an abnormality such as a temperature rise has occurred in the consumer equipment E1. When the odor sensor detects a specific odor, the determination unit 61 determines that an abnormality such as a temperature rise has occurred in the consumer equipment E1.

The transmission of the inspection information from the configuration for detecting the inspection information (camera, odor sensor, etc.) to the communication unit 7 is performed, for example, via wireless communication, power line carrier communication, or a communication line provided separately from the power line. It is done by wired communication.

(Modification 2)
Hereinafter, the leakage amount detection system X1 according to the second modification will be described. The same components as those in the embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the embodiment, the determination unit 61 is included in the processing unit 6 of the main breaker 3. On the other hand, the determination unit 61 of the present modification 2 is arranged outside the cabinet 10 of the distribution board 1. The determination unit 61 is included in, for example, the repeater 91 or the external device 93. That is, the determination unit 61 included in the repeater 91 or the external device 93 determines whether or not there is an abnormality in the consumer equipment E1 based on the inspection information output from the communication unit 7.

(Modification example 3)
Hereinafter, the leakage amount detection system X1 according to the third modification will be described. The same components as those in the embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The earth leakage amount detection system X1 of the present modification 3 further includes a repeater 91 in addition to the configuration of the earth leakage amount detection system X1 of the embodiment. The function of the repeater 91 is the same as that of the embodiment. That is, the repeater 91 relays the communication between the communication unit 7 of the main breaker 3 and the external device 93. The repeater 91 may have at least a function of relaying the communication of inspection information from the communication unit 7 to the external device 93.

The repeater 91 is built in, for example, the housing of the main breaker 3. However, the repeater 91 may be attached to the housing of the main breaker 3 from the outside of the housing of the main breaker 3. Further, the repeater 91 may be provided separately from the main breaker 3. For example, the repeater 91 may be arranged outside the main breaker 3 and inside the cabinet 10 of the distribution board 1.

(Other variants of the embodiment)
Hereinafter, other modifications of the embodiment will be listed. The following modifications may be realized in appropriate combinations. Further, the following modified examples may be realized in combination with the above-mentioned modified examples as appropriate.

The same function as the leakage amount detection system X1 may be embodied by the leakage amount detection method. As shown in FIG. 4, the leakage amount detection method according to one aspect includes a detection step ST1 and a notification step ST3. In the detection step ST1, the amount of electric leakage is detected between the branch breaker 2 and the responsible demarcation point 102 of the consumer equipment E1 in which the branch breaker 2 is installed. In the notification step ST3, inspection information including information on the amount of leakage detected in the detection step ST1 is output.

More specifically, the leakage amount detection method further includes determination step ST2, for example, as shown in FIG. After the detection step ST1, in the determination step ST2, the determination unit 61 determines whether or not the current date and time matches the preset date and time. When the determination unit 61 determines that the current date and time matches the set date and time (determination step ST2: YES), the communication unit 7 outputs inspection information including information on the amount of leakage detected in the detection step ST1 (notification step ST3). ).

The communication unit 7 may have a function of outputting inspection information irregularly. The communication unit 7 may output inspection information only when a predetermined condition that can be satisfied irregularly is satisfied, for example. The predetermined condition is, for example, that the determination unit 61 determines that the consumer equipment E1 has an abnormality based on the inspection information.

Further, the communication unit 7 may have a function of periodically outputting inspection information and a function of outputting inspection information when the above-mentioned predetermined conditions are satisfied. That is, the communication unit 7 may have a function of periodically outputting inspection information and a function of irregularly outputting inspection information.

In addition, conditions for output from the communication unit 7 may be set for each information included in the inspection information. For example, the communication unit 7 may output information on the amount of leakage detected by the zero-phase current transformer 30 every year, and may output the temperature measured by the temperature sensor 45 every month.

Further, the communication unit 7 may output inspection information in real time. That is, the communication unit 7 may output the inspection information every time a relatively short period (for example, 1 second, 10 seconds, or 1 minute) elapses.

A plurality of repeaters 91 may be provided. That is, the communication between the communication unit 7 and the external device 93 may be relayed by the plurality of repeaters 91. For example, a first repeater and a second repeater are provided, the first repeater relays the communication between the communication unit 7 and the second repeater, and the second repeater is the first repeater. Communication between the repeater and the external device 93 may be relayed.

The communication unit 7 may communicate with the external device 93 without going through the repeater 91.

The repeater 91 acquires information from at least a part of the configuration (temperature sensor 45, lightning arrester 43, etc.) of the consumer equipment E1 without going through the communication unit 7, and outputs the information to the external device 93 or the communication unit 7. May be good. The transmission of inspection information from each configuration of the consumer equipment E1 to the repeater 91 is performed, for example, by wireless communication, power line carrier communication, or wired communication via a communication line provided separately from the power line.

The main breaker 3 may have a function of automatically returning after performing an operation of shutting off the electric circuit in the automatic test of leakage detection. The automatic return means that the main breaker 3 is automatically energized (turned on) after the main breaker 3 is shut off. For example, the main circuit breaker 3 may enable the function of automatically recovering when a signal that triggers an automatic test is input, and disable the function of automatically recovering in other cases.

The operation of shutting off the electric circuit in the automatic test of leakage detection is not limited to that performed by the main breaker 3. That is, the operation of cutting off the electric circuit may be an operation of cutting off the main line (leading line 200, connecting line 201 or conductive bar 202), or an operation of cutting off the branch circuit (circuit 8) provided with the branch breaker 2. It may be.

The drive switch 55 is not limited to the semiconductor switching element. The drive switch 55 may be a mechanical switching element. Further, the drive switch 55 may be turned on and off by operating the actuator provided in the main breaker 3 in response to the command signal from the processing unit 6.

The leakage amount detection system X1 is provided in the branch breaker 2, and the leakage amount of the branch circuit (circuit 8) may be detected by the zero-phase current transformer 30 (leakage amount detection unit). Further, as the branch breaker 2, an earth leakage breaker provided with an earth leakage amount detection system X1 may be adopted.

The communication unit 7 may output inspection information in response to a command signal from the outside of the main breaker 3 (for example, a command signal transmitted from the external device 93 and input to the main breaker 3 via the communication unit 7). ..

In addition to the inspection information, the communication unit 7 may output information regarding at least one of the measured value of the water meter and the measured value of the gas meter.

The determination unit 61 of the embodiment determines that an abnormality called an electric leakage has occurred in the trunk line, for example, when the amount of electric leakage detected by the zero-phase current transformer 30 is equal to or greater than the electric leakage amount threshold value. Here, the earth leakage amount detection system X1 may include a setting unit for setting the earth leakage amount threshold value. For example, when the command signal transmitted from the external device 93 contains information for designating the leakage amount threshold value, the setting unit sets the leakage amount threshold value from the current leakage amount threshold value, and the leakage amount specified by the command signal. Update to the quantity threshold.

The external device 93 may be a mobile terminal such as a smartphone or a tablet terminal.

The external device 93 may notify the user of information regarding the inspection information received from the communication unit 7. The external device 93 may, for example, notify the resident (user) of the house in which the distribution board 1 is installed of the information regarding the inspection information received from the communication unit 7 by an image or a voice. As a result, the resident can know, for example, whether or not there is an electric leakage at home. Further, the communication unit 7 or the repeater 91 may notify the user of information regarding the inspection information.

(Summary)
From the embodiments described above, the following aspects are disclosed.

The leakage amount detection system (X1) according to the first aspect includes a leakage amount detection unit (zero-phase current transformer (30)) and a communication unit (7). The earth leakage amount detection unit detects the earth leakage amount between the branch breaker (2) and the responsibility demarcation point (102). The responsible demarcation point (102) is, more specifically, the responsible demarcation point (102) of the consumer equipment (E1) in which the branch breaker (2) is installed. The communication unit (7) outputs inspection information. The inspection information includes information on the amount of leakage detected by the leakage amount detection unit.

According to the above configuration, it is possible to reduce the labor of inspection work of the consumer equipment (E1).

Further, in the leakage amount detection system (X1) according to the second aspect, in the first aspect, the leakage amount detection unit (zero-phase current transformer (30)) is the cabinet (10) of the distribution board (1). It is placed inside the.

According to the above configuration, the installation space of the leakage amount detection unit (zero-phase current transformer (30)) can be easily secured.

Further, in the leakage amount detection system (X1) according to the third aspect, in the first or second aspect, the leakage amount detection unit (zero-phase current transformer (30)) is a leakage breaker (main breaker (3)). Be prepared for.

According to the above configuration, it is easier to install the earth leakage detection system (X1) as compared with the case where the earth leakage detection system (X1) is provided separately from the earth leakage breaker.

Further, in the leakage amount detection system (X1) according to the fourth aspect, the inspection information is detected by the leakage amount detection unit (zero-phase current transformer (30)) in any one of the first to third aspects. Includes information about the integrated value of the leakage amount.

According to the above configuration, the communication unit (7) can output more information as inspection information.

Further, the leakage amount detection system (X1) according to the fifth aspect further includes a determination unit (61) in any one of the first to fourth aspects. The determination unit (61) determines whether or not there is an abnormality in the consumer equipment (E1) based on the inspection information.

According to the above configuration, the leakage amount detection system (X1) and the system using the leakage amount detection system (X1) can operate according to the presence or absence of abnormality in the consumer equipment (E1).

Further, in the leakage amount detection system (X1) according to the sixth aspect, in the fifth aspect, the determination unit (61) is arranged outside the cabinet (10) of the distribution board (1).

According to the above configuration, since it is not necessary to provide a space for installing the determination unit (61) inside the cabinet (10), as compared with the case where the determination unit (61) is installed inside the cabinet (10). , The configuration in the cabinet (10) can be arranged with a margin.

Further, the leakage amount detection system (X1) according to the seventh aspect further includes a repeater (91) in any one of the first to sixth aspects. The repeater (91) relays the communication of inspection information from the communication unit (7) to the external device (93).

According to the above configuration, communication can be stabilized as compared with the case where the repeater (91) is not provided.

Further, in the leakage amount detection system (X1) according to the eighth aspect, in any one of the first to seventh aspects, the communication unit (7) has a function of actively outputting inspection information.

According to the above configuration, the communication volume of the communication unit (7) can be reduced as compared with the case where the communication unit (7) requires an external command signal or the like to output inspection information.

Further, in the leakage amount detection system (X1) according to the ninth aspect, the inspection information is detected by the leakage amount detection unit (zero-phase current transformer (30)) in any one of the first to eighth aspects. Includes in-board information in addition to information on the amount of leakage. The information in the panel is information detected inside the cabinet (10) of the distribution board (1).

According to the above configuration, the communication unit (7) can output more information as inspection information.

Further, in the leakage amount detection system (X1) according to the tenth aspect, the inspection information is detected by the leakage amount detection unit (zero-phase current transformer (30)) in any one of the first to ninth aspects. Includes off-board information in addition to information on the amount of leakage. The off-board information is information detected outside the cabinet (10) of the distribution board (1).

According to the above configuration, the communication unit (7) can output more information as inspection information.

Further, in the earth leakage detection system (X1) according to the eleventh aspect, in any one of the first to tenth aspects, the inspection information is the temperature of the configuration of the consumer equipment (E1) and the earth leakage detection unit (leakage amount detection unit). As a result of the automatic test of leakage detection in the zero-phase current transformer (30)), the screw terminal (124) of the consumer equipment (E1) is loosened, the discoloration of a specific part of the consumer equipment (E1), and the consumer equipment. Contains information about at least one of the odors in the particular space of (E1).

According to the above configuration, the communication unit (7) can output more information as inspection information.

The configuration other than the first aspect is not an essential configuration for the leakage amount detection system (X1) and can be omitted as appropriate.

Further, the automatic maintenance and inspection system (repeater (91), external device (93)) according to the twelfth aspect is a communication unit of the leakage amount detection system (X1) according to any one of the first to eleventh aspects. Receive inspection information from (7).

According to the above configuration, it is possible to reduce the labor of inspection work of the consumer equipment (E1).

Further, the leakage amount detection method according to the thirteenth aspect includes a detection step (ST1) and a notification step (ST3). In the detection step (ST1), the amount of leakage is detected between the branch breaker (2) and the demarcation point of responsibility (102). The responsible demarcation point (102) is, more specifically, the responsible demarcation point (102) of the consumer equipment (E1) in which the branch breaker (2) is installed. In the notification step (ST3), inspection information is output. The inspection information includes information on the amount of leakage detected in the detection step (ST1).

According to the above configuration, it is possible to reduce the labor of inspection work of the consumer equipment (E1).

Not limited to the above aspect, various configurations (including modified examples) of the leakage amount detection system (X1) according to the embodiment can be realized by the leakage amount detection method.

1 Distribution board 10 Cabinet 2 Branch breaker 3 Main breaker (leakage breaker)
30 Zero-phase current transformer (leakage amount detector)
61 Judgment unit 7 Communication unit 91 Repeater (automatic maintenance and inspection system)
93 External device (automatic maintenance and inspection system)
102 Responsibility demarcation point 124 Thread terminal E1 Consumer equipment ST1 Detection step ST3 Notification step X1 Leakage detection system

Claims (13)

An earth leakage detection unit that detects the amount of leakage between the branch breaker and the demarcation point of responsibility of the consumer equipment in which the branch breaker is installed,
A communication unit that outputs inspection information including information on the leakage amount detected by the leakage amount detection unit is provided.
Leakage detection system. The leakage amount detection unit is arranged inside the cabinet of the distribution board.
The leakage amount detection system according to claim 1. The earth leakage amount detection unit is provided in the earth leakage breaker.
The leakage amount detection system according to claim 1 or 2. The inspection information includes information on an integrated value of the leakage amount detected by the leakage amount detection unit.
The leakage amount detection system according to any one of claims 1 to 3. Further provided with a determination unit for determining whether or not there is an abnormality in the consumer equipment based on the inspection information.
The leakage amount detection system according to any one of claims 1 to 4. The determination unit is arranged outside the cabinet of the distribution board.
The leakage amount detection system according to claim 5. A repeater for relaying the communication of the inspection information from the communication unit to the external device is further provided.
The leakage amount detection system according to any one of claims 1 to 6. The communication unit has a function of actively outputting the inspection information.
The leakage amount detection system according to any one of claims 1 to 7. The inspection information includes information on the inside of the cabinet, which is information detected inside the cabinet of the distribution board, in addition to the information on the amount of leakage detected by the leakage amount detection unit.
The leakage amount detection system according to any one of claims 1 to 8. The inspection information includes, in addition to the information regarding the leakage amount detected by the leakage amount detection unit, the outside information which is the information detected outside the cabinet of the distribution board.
The leakage amount detection system according to any one of claims 1 to 9. The inspection information includes the temperature of the configuration of the consumer equipment, the result of an automatic test of leakage detection in the leakage amount detection unit, loosening of the screw terminal of the consumer equipment, discoloration of a specific part of the consumer equipment, and Contains information about at least one of the odors in a particular space of the consumer equipment.
The leakage amount detection system according to any one of claims 1 to 10. The inspection information is received from the communication unit of the leakage amount detection system according to any one of claims 1 to 11.
Automatic maintenance and inspection system. A detection step for detecting the amount of leakage between the branch breaker and the demarcation point of responsibility of the consumer equipment in which the branch breaker is installed, and
A notification step for outputting inspection information including information on the amount of leakage detected in the detection step is provided.
Leakage detection method.

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