JP7149020B2 - Distribution board - Google Patents

Description

TECHNICAL FIELD The present invention relates to a distribution board used in a house or the like.

A general distribution board is composed of a main switch (a main branch circuit breaker in Patent Document 1) housed in the body and a plurality of branch switches (a branch circuit breaker in Patent Document 1). there is A cover is provided on the front side of the body, and the cover is formed with a window hole for exposing the boss portion where the operation lever, which is the operation portion of the main switch and branch switch, is arranged. (For example, Patent Document 1).

In such a general distribution board, when an abnormality such as an overcurrent or a short circuit is detected in a main switch or branch switch, the operation lever (in Patent Document 2, the operation handle) tilts or stands up to close the circuit. A trip operation to cut off is performed. In this way, since the circuit is cut off by mechanical operation, for example, when a failure occurs, it is necessary to replace the main switch or the branch switch. In general, a branch switch is set to have a smaller rated capacity (rated voltage, rated current, etc.) than a trunk switch. Also, for example, multiple load devices (eg, microwave ovens, dryers, etc.) that use large currents may be connected to a single branch switch. Due to this situation, the branch switch has a higher number of tripping operations and connection/disconnection operations due to user operation, etc., compared to the main switch, and its replacement frequency is higher than that of the main switch. Tend.

Patent Literature 2 discloses a distribution board in which a branch switch (in Patent Literature 2, a branch breaker) can be easily replaced. In this device, the branch switch is detachably mounted on the breaker mounting plate, and the electric power measuring instrument and the signal output end of the branch switch are wired through a gap formed on the back side of this mounting plate. . As a result, the wiring does not become an obstacle when replacing the branch switch that needs to be replaced due to a failure or the like.

Further, Patent Document 3 discloses a plurality of branch switches (branch breakers in Patent Document 3) arranged in the longitudinal direction on both sides of the base in the short direction, and a main switch held on the base. A distribution board is disclosed with a display unit disposed on a bar. The display unit has a plurality of LEDs arranged adjacent to corresponding branch breakers. In the distribution board of Patent Document 3, the LED of the display unit lights up or blinks in accordance with a comparison between a preset current threshold value and a current value detected by a current sensor.

JP-A-2002-78120 JP 2009-207237 A Japanese Patent Application Laid-Open No. 2008-136280

However, the conventional distribution boards disclosed in Patent Documents 1 to 3 have a problem that the size of the distribution board increases depending on the number of main switches and branch switches. That is, for example, as the number of branch switches increases with the increase in the number of load devices used indoors, there is a problem that the size of the distribution board needs to be increased. If the number of branch switches to be added exceeds the number of branch switches specified based on the size of the existing distribution board when adding branch switches to an existing house, etc., the distribution board must be added ( addition) or replace with a distribution board that is larger than the existing distribution board.

Furthermore, since the conventional branch switch is of a thermal electromagnetic type including, for example, a bimetal as a constituent part, it generates heat due to the applied current. In order to mitigate the effects of this heat generation, in other words, to secure the cooling effect, it is necessary to secure the placement intervals of the branch switches and secure the surrounding space. It's not easy.

In addition, as described above, the branch switch needs to be replaced, for example, at predetermined intervals, and the frequency of replacement is higher than that of the main switch. Since the distribution board is often installed in a relatively dark and high position such as the entrance or the ceiling of the toilet, there is a problem that the replacement work of the branch switch is troublesome.

To address these issues, it is conceivable to replace both the main switch and the branch switch with electrically controlled units such as relays (for example, latch relays and semiconductor relays). Compared to the main switches and branch switches used in existing distribution boards, these units generate less heat due to current flow, and the size of the elements that make up each unit can be reduced. Therefore, even when the number of branch switches increases, the trunk switches and the branch switches can be accommodated in a case of a fixed size.

However, if a relay is used for the main switch and the branch switch, for example, if the driving part of the relay breaks while the energized state is maintained, the energized state will be maintained unless the relay is removed. A fault may occur in which current continues to flow in the Considering that a voltage of about 100 V to 200 V, for example, is applied to the distribution board, and a current of about 20 A to 100 A, for example, flows, such a configuration that has the possibility of continuing the energized state is not preferable.

In addition, in the conventional distribution board, when a main switch or a branch switch is interrupted due to an overcurrent or an earth leakage, there is a problem that it is unclear which branch switch has interrupted and what the cause is. For example, Patent Document 3 discloses a technique for displaying the usage status of a branch switch by lighting a light-emitting diode, but does not disclose a method for notifying the cause of an interruption when the branch switch is interrupted. In addition, since the distribution board is often installed in a relatively dark and high position such as the entrance or the ceiling of the toilet, the display method disclosed in Patent Document 3 increases the number of branch switches. In this case, there is a problem that it is difficult to distinguish the blocked branch switch. In particular, when a power outage occurs and the surroundings are dark, there is a problem that it is difficult to determine which branch switch has been cut off.

The present invention has been made to solve the above problems, and its main purpose is to provide a distribution board with improved convenience while ensuring the safety of the distribution board.

The distribution board according to the present invention includes a main switch that disconnects electrical connection by a trip operation when there is an abnormality in the energized state, and a branch switch that disconnects electrical connection by controlling a relay based on a branch energization signal. It is configured by connecting the

That is, in the first aspect of the present invention, the distribution board includes a master switch and a plurality of branch switches connected to the output side of the master switch. Furthermore, the distribution board includes a branch energization detection unit that detects whether or not there is an abnormality in the energization state of the branch switch and outputs a branch energization signal. When there is an abnormality in the energized state of the main switch, the main switch cuts off the electric circuit of the main switch by a trip operation, and the branch switch receives the branch energization signal and the branch energization. It has a switching unit for electrically controlling opening and closing of the electric circuit of the branch switch based on a signal. Moreover, it is provided with a communication section for transmitting the detection result of the branch energization detection section to the outside.

According to this aspect, the trunk switch interrupts the electric circuit by the trip operation, that is, the electric circuit is interrupted by mechanical means. can do. On the other hand, the branch switch opens and closes (connects/disconnects) the electric circuit by electrical control of the switching unit based on the branch energization signal. In general, such an electrically controlled switching unit has a longer life and can be made smaller than a device that cuts off an electric circuit by mechanical means. Therefore, the distribution board according to the present disclosure has a longer service life and can be made smaller than when the distribution board is configured entirely by mechanical means. Furthermore, the switching unit by electrical control can suppress heat generation as compared with a device that cuts off the electric circuit by mechanical means. Therefore, it is not necessary to secure a space between each branch switch and a surrounding space for securing a cooling effect, and the distribution board can be miniaturized. In addition, the switching unit by electrical control can be mounted on a board such as a printed circuit board, for example. It is possible to facilitate the work of installing a distribution board and the work of replacing parts in such as.

According to a second aspect of the present invention, in the distribution board according to the first aspect, a touch panel that displays the state of the branching switch and receives an operation by a user on the display portion thereof; and a control unit for outputting a switching control signal for on/off-controlling the connection of the electrical circuit of the switch to the switching unit. The switching unit controls opening/closing of the electric circuit connection of the branch switch based on at least one of the branch energization signal and the switching control signal.

According to this aspect, there is provided a touch panel that enables on/off control of the connection of the electric circuit of the branch switch in response to the user's operation. It is possible to add information to the touch panel, display multiple pieces of information in an overlapping manner, and change the layout of the display. It can be displayed in an easy-to-understand manner. Furthermore, it is also possible to display information other than the distribution board on the touch panel. Specifically, for example, the distribution board according to this aspect is installed in a kitchen or the like, and in normal times, instead of displaying information about the distribution board, information such as television or the Internet is displayed, or the user on the Internet Search by (search for recipes, etc.), etc. can be made possible.

Further, the distribution board according to the second aspect includes a housing in which the main switch and the plurality of branch switches are accommodated, the touch panel is disposed so as to be operable from the surface of the housing, and the main switch has an operation lever configured to be able to turn on and off the connection of the electric circuit of the main switch, the operation lever is arranged on the left side of the touch panel so as to be exposed to the outside of the housing, It may be configured so that it can be operated from outside the body.

According to this aspect, the operation lever of the main switch is exposed on the left surface of the housing so as to be operable. In general, a distribution board is often provided in a relatively dark and high position such as the ceiling of an entrance or a toilet, and therefore the space in the left-right direction of the housing is often limited. In this aspect, a space for the area of the touch panel is formed on the right side of the operation lever. This makes it easier for the user to operate the operation lever with the right hand, which requires tilting or standing operation.

The distribution board also includes a main energization detector that detects the energization state of the main switch and outputs a main energization signal. When at least one of an energized state of the branch switch based on the branch energized signal and an energized state of the main switch based on the main energized signal is in an energized abnormal state, the control unit detects the energized abnormal state. may be displayed on the touch panel.

According to this aspect, the user can, in addition to the information of the on/off-controlled switches (main switches and branch switches may be collectively referred to simply as switches; the same shall apply hereinafter), A switch in an abnormal state can be grasped instantly and clearly. Further, for example, the control unit reads information on the content of the abnormality in the energization state in addition to whether or not there is an abnormality in the energization state as the energization abnormality state received from the branch energization signal, thereby determining the type of the abnormality. can be displayed. Such a display allows the user to grasp the next necessary action, work, and the like. Specifically, for example, it is possible to instantly grasp whether the abnormality is something that the resident can solve by himself, or whether it is an abnormality that needs to be reported to a qualified person such as an electric power company or an electrician.

Further, in the distribution board, the touch panel may display the information indicating the switch in the abnormal energization state in such a manner that the information indicating the switch in the abnormal energization state is emphasized more prominently than the other information.

By emphasizing and displaying the abnormal energization state more conspicuously than other information as in the present mode, the switch in the abnormal energization state can be more easily, instantaneously and clearly grasped. As a result, the user can more easily and instantaneously comprehend the next necessary action, work, and the like. By displaying such a display, the user can grasp the next necessary action, work, etc., and perform the restoration work of the switch. It should be noted that the concept of emphasizing and displaying the information more conspicuously than other information includes completely omitting other information and emphasizing and displaying the abnormality notification information on the display unit so as to be conspicuous.

In addition, in the distribution board, a housing in which the main switch and the plurality of branch switches are housed is provided integrally with the housing, and the inside and outside of the housing are configured to be electrically connectable. It may be characterized by comprising a load-side connector connected to the load-side wiring of each branch switch inside the body.

According to this aspect, the load-side wiring of each branch switch is connected to the load-side connector, that is, it is configured to be connectable to an external load device via the load-side connector. As a result, for example, when constructing a new distribution board, in the conventional distribution board, it was necessary to connect the wiring of the load device to each branch switch, whereas in this aspect, Installation can be performed by connecting the load device side connector connected to the wiring of the load device to the load side connector provided integrally with the housing of the distribution board. This improves the ease of construction work. Furthermore, for example, if there is a failure of the branch switch or a change in the wiring of the connected equipment, it is possible to change the wiring to the connector on the load device side without changing the wiring in the distribution board, It is possible to change the connection with the switch.

In addition, in the distribution board, a housing in which the main switch and the plurality of branch switches are housed is provided integrally with the housing, and the inside and outside of the housing are configured to be electrically connectable. A power supply side connector connected to the input side of the main switch inside the body, and a battery connected to the power supply side connector and supplying power to at least one of the control unit and the touch panel when the main switch is cut off. It may be characterized by comprising

According to this aspect, the battery is connected to the power connector. That is, it is connected to the external power supply via the power supply side connector without going through the main switch. The battery will be charged if power is supplied from the As a result, for example, the control unit and the touch panel can be operated even during a power failure or when the master switch is shut off for a long period of time (for example, a long period of absence, moving, etc.).

According to the present invention, a main switch is provided that cuts off the electric circuit by tripping when there is an abnormality in the energized state, and the opening and closing of the electric circuit of the branch switch is realized by electrical control, thereby ensuring safety and dividing the electric circuit. The convenience of the electric board can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view of the distribution board which concerns on embodiment, (a) is the perspective view seen from the diagonally upper right side, (b) is the perspective view seen from the diagonally lower right side. It is the perspective view which removed the cover of the distribution board which concerns on embodiment, and was seen from the diagonal upper right. It is the figure which showed the circuit structural example of the distribution board which concerns on embodiment. FIG. 4 is a diagram for explaining connections between branch relays and branch relay connections; It is a flowchart which shows the initial energization diagnosis flow of a trunk switch. It is a flowchart of ON diagnosis of a master switch. It is a flowchart of ON diagnosis of a master switch. It is a flowchart of ON diagnosis of a branch relay. FIG. 11 is a flowchart of ON diagnosis of a branch relay when the branch relay is turned ON/OFF; It is a flowchart of the normal time diagnosis of the trunk switch. It is a flowchart of the normal time diagnosis of the trunk switch. It is a flowchart of the normal time diagnosis of the trunk switch. FIG. 10 is a flow diagram of normal-time diagnosis of a branch relay; FIG. 10 is a flowchart of peak cut processing; It is the figure which showed the example of a display of the touch panel in a steady state. It is the figure which showed an example of the initial display screen of a touch panel. It is the figure which showed the example of a display of a touch panel in the abnormal state of a master switch. It is the figure which showed the example of a display of the touch panel in the abnormal state of a branch relay. It is the figure which showed the other circuit structural example of the electricity distribution board which concerns on embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. The following description of preferred embodiments is merely exemplary in nature and is not intended to limit the invention, its scope or its uses. Also, in order to facilitate understanding of the invention, descriptions of substantially the same or similar items may be omitted.

(Structure of distribution board)
FIG. 1 is a perspective view of the distribution board according to the embodiment, FIG. 2 is a perspective view of the distribution board with the cover removed and viewed obliquely from the upper right side, and FIG. 3 shows a circuit configuration example of the distribution board. It is a diagram.

As shown in FIGS. 1 to 3, the distribution board 100 includes a main switch 110 that receives power from an external power source, and a main current measuring unit 121 and a main abnormality detecting unit 122, which will be described later. It comprises a plurality of branch switches 130 connected to the load device side of the main switch 110 via a branch relay connection 123 and a rectangular box-shaped housing 101 that houses them. The branch switch 130 has a branch relay 131 as a switching unit. In this embodiment, branch relay 131 is described as a latch relay.

Note that the branch relay 131 is not limited to a latch relay, and may be, for example, another relay such as a semiconductor relay (see "Other Embodiments" described later and FIG. 19). Further, as the switching unit, for example, switching means other than relays, such as switching means of a contactless power supply system, may be used to switch between opening and closing of the electric circuit. In the present disclosure, a relay is a concept including a contact relay, a non-contact relay, and a hybrid relay that combines a contact relay and a non-contact relay.

The housing 101 is provided with a main switch 110, a branch relay 131, and the like, and has a rectangular box-like box 101a with an open front surface, and a cover 101b that covers the opening of the box 101a. The box 101a is attached to a wall surface or the like with screws, hooks (not shown), or the like. Also, the box 101a and the cover 101b are screwed with screws (not shown), for example, on the side surfaces in the longitudinal direction (horizontal direction in FIG. 1).

It should be noted that the place where the screws are fixed may be screwed from the front side of the cover 101b, for example. Alternatively, a fitting portion (not shown) may be provided on the box 101a and the cover 101b, and the box 101a and the cover 101b may be fixed by fitting the fitting portion. In the description of the present embodiment, "front" refers to the cover 101b side, and "rear" refers to the box 101a side.

A touch panel 200 is provided on the front surface of the cover 101b, extending from the right end to the left side of the middle of the cover 101b between the upper end and the lower end. A home button 104 for returning the touch panel 200 to the initial display state is provided in the vertical middle portion on the left side of the touch panel 200 on the front surface of the cover 101b.

A rectangular through-hole 102a extending in the front-rear direction is provided in the left-hand side of the home button 104, in the vertical middle portion thereof. ing. As a result, when the cover 101b is attached to the box 101a, the main projecting portion 112 of the main switch 110 and an operation lever 113, which will be described later, are exposed to the outside of the cover 101b. Similarly, a portion of the cover 101b near the lower end on the left side of the touch panel 200 has a battery display portion 161, a microphone 162, and a speaker 163, which will be described later, which are slightly larger than these in order to expose them to the outside. Rectangular through holes 102b, 102c, and 102d are provided to penetrate in the front-rear direction. A power button 103 for turning on/off the touch panel 200 is provided at the right end of the lower surface of the cover 101b.

As shown in FIG. 2, on both sides in the longitudinal direction of the upper surface of the box 101a, a power-side connector 151 and a load-side connector 156 integrally protrude upward from the box 101a. The power-side connector 151 has a plurality of connection terminals that can be electrically connected inside and outside the housing 101, and is configured to be connectable to a connector 301a of a connection cable 301 connected to an external power supply. A connection terminal of the power-side connector 151 is connected to an input terminal of the master switch 110 inside the housing 101 . With such a configuration, the master switch 110 is connected to an external power source via the power connector 151 and the connection cable 301 .

The trunk switch 110 includes a rectangular box-shaped trunk base portion 111, a rectangular box-shaped trunk projection portion 112 integrally protruding from the front side of the trunk base portion 111, and a through hole formed in the trunk projection portion 112. An operation lever 113 protrudes forward from the window and is configured to be capable of ON/OFF control of the connection/disconnection of the electrical circuit of the main switch 110 in response to the user's standing/tilting operation. Further, the master switch 110 includes a circuit breaking mechanism (not shown) configured to open and close the electrical circuit of the master switch 110 by a trip operation. The electric circuit breaking mechanism is composed of an electromagnetic instantaneous tripping device, a bimetal type time-delayed tripping device, a trip coil, etc., and the load device of the main switch 110 such as overcurrent, short-circuit current, earth leakage, overvoltage, etc. It is a mechanism that mechanically automatically cuts off the electric circuit of the master switch 110 (hereinafter also referred to as trip operation) when there is an abnormality in the energization state on the side.

The trunk energization detection unit 120 includes a trunk current measurement unit 121 and a trunk abnormality detection unit 122, detects the presence or absence of an abnormality in the energization state of the trunk switch 110, and generates a trunk energization signal D1 indicating the detection result. to output The main current measuring unit 121 is for detecting a short circuit and overcurrent, and specifically measures the current flowing through the electric circuit (for example, Japanese Patent Application Laid-Open No. 2000-299934, Japanese Patent Application Laid-Open No. 2008-131765 ), and outputs the measurement result as the main current signal D11. The main abnormality detection unit 122 is for detecting overvoltage and electric leakage. 2009-081928), and the result of the measurement is output as the main abnormality signal D12. In the present disclosure, the main energization signal D1 refers to both or either of the main current signal D11 and the main abnormality signal D12.

As shown in FIGS. 3 and 4 , the branch relay connection unit 123 is connected to the load device side of the main energization detection unit 120 , and is supplied from an external power supply via the main switch 110 and the main energization detection unit 120 . The supplied electric power is branched and output to each branch relay 131 . Specifically, the branch relay connection portion 123 is a rectangular body extending in the longitudinal direction of the box 101a in the vertical middle of the right side of the box 101a. The terminal insertion openings 123a are arranged in the longitudinal direction of the branch relay connection portion 123 at a predetermined pitch. The terminal insertion openings 123a correspond to the N-pole terminal insertion openings 123b arranged at a predetermined pitch in the longitudinal direction of the box 101a on the front side of the branch relay connection portion 123, and the respective N-pole terminal insertion openings 123b. As shown, on the rear side of the branch relay connection portion 123, the L-pole terminal insertion openings 123c are formed side by side at a predetermined pitch in the longitudinal direction of the box 101a.

The plurality of branch relays 131 are arranged side by side in the longitudinal direction of the box 101a on both sides of the branch relay connection portion 123 in the vertical direction. Each branch relay 131 includes two primary N-pole terminals 131b and two primary L-pole terminals 131c projecting from one side surface thereof. And the primary side L pole terminal 131 c is connected to the branch relay connection section 123 by inserting it into the N pole terminal insertion opening 123 b and the L pole terminal insertion opening 123 c of the branch relay connection section 123 .

As shown in FIGS. 2 and 3, a branch energization detector 140 is arranged on the load device side of each branch relay 131, and the load device side wiring of each branch energization detector 140 is connected to a load side connector. 156. The load-side connector 156 is configured to be connectable to a connector 302a of a connection cable 302 connected to external load devices A, B, and C. As shown in FIG.

The branch energization detection unit 140 includes a branch current measurement unit 141 and a branch abnormality detection unit 142, detects whether there is an abnormality in the energization state of the branch switch 130, and outputs a branch energization signal D2 indicating the detection result. to output The branch current measurement unit 141 is for detecting short-circuit current and overcurrent, and specifically measures the current flowing through the electric circuit (for example, Japanese Patent Application Laid-Open No. 2000-299934, Japanese Patent Application Laid-Open No. 2008-131765 See publication), and outputs the measurement result as a branch current signal D21. The branch abnormality detection unit 142 is for detecting tracking and electric leakage. , Japanese Unexamined Patent Application Publication No. 2009-081928), and outputs the measurement result as a branch abnormality signal D22. In the present disclosure, the branch energization signal D2 refers to both or one of the branch current signal D21 and the branch abnormality signal D22.

The distribution board 100 is connected to the power supply side connector 151 in the box 101a, detects that the power supply to the main switch 110 is interrupted due to a power failure or the like, and outputs a power failure detection signal D3 based on the detection result. a battery 153 connected to an external power supply via a power supply side connector 151 and a power failure detection unit 152; a signal processing unit 154 as a control unit; a battery display unit 161 indicating that the It has

The battery 153 is connected to the signal processing unit 154, the panel input/output unit 165, and the touch panel 200, and the signal processing unit 154, the panel input/output unit 165, and the touch panel 200 are supplied with power from an external power supply via the battery 153. receive. As a result, the user can check the display of the touch panel 200 and perform operations even during a power outage, for example. The signal processing unit 154 is also connected to the load device side of the trunk energization detection unit 120, and may be supplied with power via the trunk switch 110 and the trunk energization detection unit 120 during normal operation.

The battery 153 is connected to an external power source via the power connector 151 and the power failure detector 152 as described above, that is, connected to the input side of the main switch 110 . With such a configuration, the battery 153 is charged as long as power is supplied from an external power source even when the main switch 110 is shut off. For example, even when the master switch 110 is shut off for a long period of time (e.g., long-term absence, moving, etc.), before the operation lever 113 of the master switch 110 is turned "ON", the operation by the touch panel 200 or the touch panel 200 can be implemented. Note that the battery 153 may be connected to only one of the signal processing unit 154 and the touch panel 200, or may be connected to other blocks such as the microphone 162 and the speaker 163 to provide an emergency power source for these. may be used as

The signal processing unit 154 has a function of controlling each block in the distribution board 100 . For example, the signal processing unit 154 monitors the state of charge of the battery 153 and performs charge control such as stopping charging when the battery 153 is fully charged. A display control signal is output to the battery display unit 161 when the remaining battery level is restored. The battery display unit 161 is configured using, for example, a magnetic reversal display element, and receives a signal from the signal processing unit 154 to switch display. With such a configuration, the battery display unit 161 can continue to display that the remaining amount of the battery 153 is less than the threshold even after the signal from the signal processing unit 154 stops.

Further, for example, the signal processing unit 154 receives the main energization signal D1 of the main energization detection unit 120, the branch energization signal D2 of the branch energization detection unit 140, and the power failure detection signal D3 of the power failure detection unit 152, and receives the main energization signal D1, Based on the branch energization signal D2 and the power failure detection signal D3, the display content of the touch panel 200 is controlled via the panel input/output unit 165, the notification of alarm information and the like from the speaker 163 is controlled, and the communication unit 164 is controlled. and send detection results via Further, the signal processing unit 154 performs ON/OFF control of the connection of the electric circuit of the branch switch 130 based on the operation input information from the touch panel 200, the voice input information from the microphone 162, and the branch energization signal D2 of the branch energization detection unit 140. That is, it outputs a switching control signal CS1 for ON/OFF-controlling the branch relay 131 to the branch relay 131, thereby controlling the switching of the electric circuit of the branch switch 130 (branch relay 131). In the following description, signal processing unit 154 controls screen display and the like of touch panel 200 via panel input/output unit 165 and receives operation information of touch panel 200 via panel input/output unit 165. , the description of passing through the panel input/output unit 165 may be omitted.

(Diagnosis of energization status of distribution board)
Next, a flow for diagnosing the energization state of the distribution board 100 (for example, a flow for diagnosing whether there is an abnormality such as a short circuit, overcurrent, leakage, overvoltage, or tracking) will be described in detail with reference to the drawings.

<Initial energization diagnosis of main switch>
FIG. 5 is a diagram showing a diagnosis flow when the main switch 110 is turned "ON", that is, when the operation lever 113 of the main switch 110 is turned "ON". In this embodiment, the rated current of the trunk switch 110 is assumed to be 60A, for example, and the rated current of the branch relay 131 is assumed to be 20A, for example. It should be noted that this rated current is an example value for facilitating understanding of the invention, and is not intended to limit the technical scope of the invention. In the following description, specific numerical values such as rated current value, rated voltage value, duration time, etc. are exemplified values for easy understanding of the invention, and are intended to limit the technical scope of the invention. not a thing

First, when the operation lever 113 of the trunk switch 110 is turned "ON", the flow advances from step SM11 to step SM12, and the signal processing section 154 starts "ON diagnosis of the trunk switch", which will be described later. Then, if there is no abnormality in the diagnosis result of the "main switch ON diagnosis", the flow proceeds from step SM13 to step SM14, and the signal processing unit 154 causes the touch panel 200 to display a normal screen. At this time, the signal processing unit 154 sets the brightness of the display on the touch panel 200 to brightness 1 (steady display) (SM15), and ends the process.

FIG. 15 is a diagram showing a display example of touch panel 200 in a steady state. FIG. 15(a) shows a display example of displaying the energized state (ON/OFF state) of each branch switch 130 in a normal state using an image diagram similar to the operation lever of a conventional distribution board. 15(b) displays the ON state and the OFF state in different colors, and uses the difference in color to display the energized state (ON/OFF state) of each branch switch 130 during normal operation. A display example is shown. The display of the energized state (ON/OFF state) is not limited to the display method shown in FIGS. 15(a) and 15(b). Any other display method may be used as long as it is a method.

In addition, as shown in FIG. 16 , the touch panel 200 may display other than the ON/OFF states of the main switch 110 and the branch relay 131 of the distribution board 100 . By enabling such display switching, the user can enjoy television, the Internet, photos, videos, etc., except when there is an abnormality or when setting the ON/OFF state of the main switch 110 or the branch relay 131, for example. You can also search for information such as maps and weather. Switching to the display screen in FIG. 16 is performed, for example, when the home button 104 is pressed. As a result, the touch panel 200 can be effectively used during times other than when there is an abnormality or when setting. Placing such a distribution board in a living room, kitchen, etc. enables the effective use of the distribution board as an information terminal in daily life, and at the time of an abnormality, the user can easily check the abnormal state. It is possible to enable the recovery work of the main switch and the branch switch.

<ON diagnosis of main switch>
FIG. 6 is a flow chart showing the details of the "main switch ON diagnosis" in step SM12 of FIG.

First, the signal processing unit 154 confirms the energized state of the main switch 110 based on the main current signal D11 from the main main current measuring unit 121 (SM210).

When the main switch 110 is not energized (“no power” in SM210), the signal processing unit 154 detects the power failure detection signal D3 from the power failure detection unit 152, the primary side (from the external power supply to the main switch 110). ) is checked (SM211).

When energization of the primary side is not confirmed (“not energized” in SM211), the signal processing unit 154 causes the touch panel 200 to display “power failure state” (SM212), and the brightness is set to be higher than the constant display brightness of 1. Bright brightness is set to 2 (SM213), and the processing of "ON diagnosis of main switch" and "initial energization diagnosis of main switch" is completed.

On the other hand, when energization of the primary side is confirmed (“energized” in SM211), signal processing unit 154 causes touch panel 200 to display “main abnormal state” (SM214), and changes the brightness of touch panel 200 to brightness. It is set to 2 (SM215), and the processing of "ON diagnosis of main switch" and "initial energization diagnosis of main switch" is terminated. At this time, the signal processing unit 154 is supplied with power via the trunk switch 110 and the trunk energization detection unit 120 . In each of the subsequent flow charts as well, the signal processing unit 154 is supplied with power via the trunk switch 110 and the trunk energization detection unit 120 unless otherwise specified. Note that the signal processing unit 154 may always receive power from the battery 153 . Also, step SM214 and step SM215 may be processed simultaneously.

Next, the case where the main switch 110 is energized in step SM210 (“energized” in SM210) will be described. FIG. 7 shows a flow chart in the case where step SM210 indicates "Energized." ” will be carried out in parallel. Each diagnosis will be described in detail below with reference to the drawings.

－Short Circuit/Overcurrent Diagnosis－
First, the "short-circuit/overcurrent diagnosis" of the trunk switch 110 will be described in detail.

Based on the main current signal D11 from the main current measuring unit 121, the signal processing unit 154 determines whether or not the energizing current of the main switch 110 is equal to or higher than a predetermined threshold value (for example, 360 A, which is described as a constant value in the drawing). Determine (SM221). If the energized current of main switch 110 is less than the predetermined threshold value ("NO" in SM221), the flow proceeds to "branch relay ON diagnosis", which will be described later.

On the other hand, when the energized current of the main switch 110 is equal to or greater than the predetermined threshold value (“YES” in SM221), the signal processing unit 154 determines whether the energized current of the main switch 110 is in the overcurrent region. , whether or not the current indicated by the master current signal D11 is less than a predetermined threshold value (for example, 1200 A) (SM222).

When the energization current of the master switch 110 is in the overcurrent region, that is, when the energization current value indicated by the master current signal D11 is less than a predetermined threshold value (“YES” in SM222), the signal processing unit 154 The touch panel 200 is caused to display "main overcurrent cutoff" (SM225), and the brightness of the touch panel 200 is set to brightness 2 (SM226).

FIG. 17(a) shows an example of the display of the above-mentioned "main trunk overcurrent cutoff" on the touch panel 200. The touch panel 200 displays, for example, "Because an overcurrent has occurred in the main trunk switch, the main switch is turned off." completed.” is displayed, and the brightness of the touch panel 200 is set to brightness 2. After that, when the user (including an operator, etc.; hereinafter the same) presses the confirm button on the touch panel 200, the signal processing unit 154 switches the display of the touch panel 200, for example, as shown in FIG. An image diagram similar to the operation lever of a conventional distribution board displaying the ON/OFF states of the master switch 110 and the branch relay 131 is displayed, and the image diagram is superimposed to indicate that the master switch 110 has been cut off due to overcurrent. is displayed (refer to the left-down hatched portion on the left side of FIG. 17(b)). At this time, the brightness of the touch panel is kept at brightness 2. Note that step SM225 and step SM226 may be processed at the same time. Also in the following diagnosis, the display of abnormality notification information and the setting of brightness may be processed at the same time.

By displaying on the touch panel 200 that the main switch 110 has been cut off due to overcurrent, the user can easily and clearly confirm the cause of the break of the main switch 110. - 特許庁As a result, the user can grasp necessary actions, work, and the like. Further, by enlarging the indication that the main switch 110 is overcurrent and increasing its brightness, the user can more easily and clearly confirm the cause of the interruption of the main switch 110. can do. In the above example, after the enlarged display as shown in FIG. 17(a), the abnormal state is displayed in response to the user's operation, superimposed on the image diagram of the operation lever as shown in FIG. 17(b). However, the screen may be switched without the user's operation, for example, after a certain period of time has elapsed. Alternatively, the enlarged display of FIG. 17(a) may be eliminated and only the display of FIG. 17(b) may be performed. In addition, only the abnormal display portion, that is, the left downward diagonal line portion on the left side of FIG. good. Also, by repeatedly switching between the display of FIG. 17A and the display of FIG.

Returning to FIG. 7 again, after completing the setting in step SM226, the signal processing unit 154 terminates the processing of "ON diagnosis of main switch" and "initial energization diagnosis of main switch". That is, even if the "leakage diagnosis" and "overvoltage diagnosis" of the main switch 110 that are executing parallel processing are in the middle of the processing, the diagnosis processing is forcibly terminated.

On the other hand, when the current value indicated by the master current signal D11 is equal to or greater than the predetermined threshold value (“NO” in SM222), the signal processing unit 154 causes the touch panel 200 to display “main short-circuit cut off”. (SM223), and sets the brightness of the touch panel 200 to brightness 2 (SM224). An example of display on the touch panel 200 is the same as in the above-described cutoff due to overcurrent (see FIGS. 17A and 17B). After completing the setting in step SM224, the signal processing unit 154 terminates the processing of "ON diagnosis of main switch" and "initial energization diagnosis of main switch". That is, even if the "leakage diagnosis" and "overvoltage diagnosis" of the main switch 110 that are executing parallel processing are in the middle of the processing, the diagnosis processing is forcibly terminated.

- Leakage Diagnosis -
Next, the "leakage diagnosis" of the trunk switch 110 will be described.

Based on the trunk abnormality signal D12 from the trunk abnormality detection unit 122, the signal processing unit 154 determines whether or not the leakage current of the trunk switch 110 is equal to or greater than a predetermined threshold value (for example, 30 mA, which is described as a constant value in the drawing). Determine (SM231). If the leakage current of main switch 110 is less than the predetermined threshold value ("NO" in SM231), the flow proceeds to "branch relay ON diagnosis", which will be described later.

On the other hand, when the ground leakage current of main switch 110 is equal to or greater than the predetermined threshold ("YES" in SM231), signal processing unit 154 determines that the period during which the ground leakage current of main switch 110 is greater than or equal to the predetermined threshold is a certain period of time. (For example, 0.1 seconds) or more is determined (SM232).

When the period in which the ground leakage current of the master switch 110 is equal to or greater than the predetermined threshold continues for a certain period of time or more ("YES" in SM232), the signal processing unit 154 causes the touch panel 200 to display "main ground leakage cutoff". (SM233), the brightness of the touch panel 200 is set to brightness 2 (SM234). The display example of the touch panel 200 is the same as in the case of "short circuit/overcurrent cutoff" described above (see FIGS. 17A and 17B). After completing the setting in step SM234, the signal processing unit 154 terminates the processing of "ON diagnosis of main switch" and "initial energization diagnosis of main switch". That is, even if the "short-circuit/overcurrent diagnosis" and "overvoltage diagnosis" of the main switch 110 that are executing parallel processing are in progress, the diagnosis processing is forcibly terminated.

On the other hand, when the period during which the leakage current of the master switch 110 is equal to or greater than the predetermined threshold is less than a certain period of time, that is, when the leakage current of the master switch 110 becomes less than the predetermined threshold within a certain period of time (in SM232 "NO"), the flow advances to "branch relay ON diagnosis", which will be described later.

- over voltage diagnosis -
Next, the "overvoltage diagnosis" of the trunk switch 110 will be described.

The signal processing unit 154 determines whether or not the voltage of the main switch 110 is equal to or higher than a predetermined threshold value (for example, 135 V, indicated as a constant value in the figure) based on the main abnormality signal D12 from the main abnormality detection unit 122. (SM241). If the voltage of the trunk switch 110 is less than the predetermined threshold value ("NO" in SM241), the flow proceeds to "branch relay ON diagnosis", which will be described later.

On the other hand, when the voltage of the main switch 110 is equal to or higher than the predetermined threshold ("YES" in SM241), the signal processing unit 154 determines that the period during which the voltage of the main switch 110 is equal to or higher than the predetermined threshold is a certain period of time (for example, , 1 second) or longer (SM242).

If the voltage of the trunk switch 110 is equal to or higher than the predetermined threshold value and continues for a certain period of time or longer ("YES" in SM242), the signal processing unit 154 causes the touch panel 200 to display "main trunk overvoltage cutoff" ( SM243), and sets the brightness of the touch panel 200 to brightness 2 (SM244). The display example of the touch panel 200 is the same as in the case of "short circuit/overcurrent cutoff" described above (see FIGS. 17A and 17B). After completing the setting in step SM244, the signal processing unit 154 terminates the processing of "ON diagnosis of main switch" and "initial energization diagnosis of main switch". That is, even if the "short-circuit/overcurrent diagnosis" and "earth leakage diagnosis" of the main switch 110 that are executing parallel processing are in the middle of the processing, those diagnosis processes are forcibly terminated.

On the other hand, if the period during which the voltage of the trunk switch 110 is equal to or higher than the predetermined threshold is less than a certain period of time, that is, if the voltage of the trunk switch 110 becomes less than the predetermined threshold within a certain period of time (“NO” in SM242). ”), the flow advances to “Branch relay ON diagnosis”, which will be described later.

As described above, in the "main switch ON diagnosis", if there is no abnormality such as a short circuit, overcurrent, earth leakage, overvoltage, or tracking, the flow proceeds to "branch relay ON diagnosis". Specifically, when there are N branch switches 130 (branch relays 131) connected to the branch relay connection unit 123 (N is an integer equal to or greater than 2), each of the N branch relays 131 is ON diagnosis of the branch relay" is executed in parallel (SS21 to SS2N). FIG. 8 is a flow chart showing the details of the "branch relay ON diagnosis" in steps SS21 to SS2N in FIG. ) is shown. The diagnosis flow is the same for other branch relays 131 (referred to as second to Nth branch relays for convenience of explanation).

<ON diagnosis of branch relay>
First, the signal processing unit 154 checks the energization state of the first branch relay 131 based on the branch current signal D21 from the branch current measurement unit 141 (SS510). When the first branch relay 131 is not energized ("No energization" in SS510), the signal processing unit 154 causes the touch panel 200 to display "OFF display of the first branch relay" (SS511). Specifically, for example, when the first branch relay 131 is a branch relay for "toilet", the display of the branch relay corresponding to "toilet" is switched to "OFF" display (see FIG. 15). At this time, signal processing unit 154 does not change the brightness of touch panel 200 . After the display setting in step SS511, the flow advances to step SM13 (diagnostic result no abnormality).

On the other hand, in step SS510, when the first branch relay 131 is energized ("energized" in SS510), the first branch relay 131 "short-circuit/overcurrent diagnosis", "leakage diagnosis" and "tracking diagnosis" are carried out in parallel. Each diagnosis will be described in detail below with reference to the drawings.

－Short Circuit/Overcurrent Diagnosis－
First, the "short-circuit/overcurrent diagnosis" of the first branch relay 131 will be described in detail.

Based on the branch current signal D21 from the branch current measuring unit 141, the signal processing unit 154 determines whether or not the energizing current of the first branch relay 131 is equal to or higher than a predetermined threshold value (for example, 120 A, which is described as a constant value in the figure). is determined (SS521). When the energized current of the first branch relay 131 is less than the predetermined threshold value ("NO" at SS521), the signal processing unit 154 causes the touch panel 200 to display "ON display of the first branch relay" (SS550). Specifically, for example, if the first branch relay 131 is the "kitchen" branch relay, the display of the branch relay corresponding to the "kitchen" is switched to the "ON" display (see FIG. 15). At this time, signal processing unit 154 does not change the brightness of touch panel 200 . After the display setting in step SS550, the flow advances to step SM13 (diagnostic result no abnormality).

On the other hand, if the energized current of the first branch relay 131 is equal to or greater than the predetermined threshold value ("YES" in SS521), the signal processing unit 154 determines whether the energized current of the first branch relay 131 is in the overcurrent region. That is, it is determined whether or not the current indicated by the branch current signal D21 is less than a predetermined threshold (for example, 400 A) (SS522).

When the energization current of the first branch relay 131 is in the overcurrent region, that is, when the energization current value indicated by the branch current signal D21 is less than a predetermined threshold ("YES" at SS522), the signal processing unit 154 , the first branch relay 131 is controlled to "OFF" by the open/close control signal CS1 (SS526). Then, the signal processing unit 154 causes the touch panel 200 to display "first branch relay overcurrent cutoff" (SS527), and sets the brightness of the touch panel 200 to brightness 2 (SS528). FIG. 18(a) shows a display example of the above-mentioned "1st branch relay overcurrent cutoff" on the touch panel 200. In FIG. FIG. 18(a) shows an example in which the first branch relay 131 is a "toilet" branch relay. On the touch panel 200, for example, an enlarged image diagram of the operation lever of the branch relay corresponding to the toilet is displayed. , the brightness of the touch panel 200 is set to brightness 2 . After that, when the user presses the confirmation button on the touch panel 200, the signal processing unit 154 switches the display on the touch panel 200, for example, as shown in FIG. 18B, the ON/OFF state of the branch relay 131 is displayed. In addition to displaying an image diagram similar to that of the control lever of the conventional distribution board, this image diagram is superimposed to indicate that the "toilet" branch relay has been cut off due to overcurrent. At this time, the brightness of the touch panel is kept at brightness 2.

By displaying on the touch panel 200 that the first branch relay 131 has been cut off due to overcurrent, the user can easily know that the first branch relay 131 among the N branch relays 131 has been cut off. In addition, it is possible to confirm clearly, and it is possible to easily and clearly confirm the cause of interruption. As a result, the user can grasp necessary actions, work, and the like. Specifically, for example, if the user is a resident of a house, it is possible to instantly determine whether the abnormality is something that can be resolved by the user himself, or whether it is an abnormality that needs to be reported to a qualified person such as an electric power company or an electrician. can grasp.

In addition, by enlarging the indication that the first branch relay 131 is overcurrent and increasing its brightness, the user can easily and clearly understand that the first branch relay 131 has been cut off and the cause thereof. can be verified. As shown in FIG. 18(a), when the operation lever is enlarged, the actual leakage current value (for example, 10 mA) may be displayed together with the display of "overcurrent" which is the cause of the interruption. good.

After completing the setting in step SS528, the signal processing unit 154 ends the “branch relay ON diagnosis” of the first branch relay 131. FIG. That is, even if the "earth leakage diagnosis" and "tracking diagnosis" of the "branch relay ON diagnosis" related to the first branch relay 131 that is executing parallel processing are in the middle of processing, those diagnosis processes are forcibly terminated. do. On the other hand, the "main switch ON diagnosis", "main switch initial energization diagnosis", and "branch relay ON diagnosis" relating to the second to Nth branch relays 131 continue.

On the other hand, when the energized current value indicated by the branch current signal D21 is equal to or greater than the predetermined threshold value ("NO" at SS522), the signal processing unit 154 turns the first branch relay 131 "OFF" by the open/close control signal CS1. control (SS523). Then, the signal processing unit 154 causes the touch panel 200 to display "First branch relay short-circuited" (SS524), and sets the brightness of the touch panel 200 to brightness 2 (SS525). An example of display on the touch panel 200 is the same as in the above-described cutoff due to overcurrent (see FIGS. 18A and 18B). After completing the setting in step SS525 , the signal processing unit 154 ends the “branch relay ON diagnosis” of the first branch relay 131 .

- Leakage Diagnosis -
Next, "leakage diagnosis" of the first branch relay 131 will be described.

Based on the branch abnormality signal D22 from the branch abnormality detection section 142, the signal processing section 154 determines whether or not the leakage current of the first branch relay 131 is equal to or higher than a predetermined threshold value (for example, 15 mA, which is described as a constant value in the figure). is determined (SS531). When the leakage current of the first branch relay 131 is less than the predetermined threshold ("NO" at SS531), the signal processing unit 154 causes the touch panel 200 to display "ON display of the first branch relay" (SS550).

On the other hand, when the leakage current of the first branch relay 131 is equal to or greater than the predetermined threshold ("YES" in SS531), the signal processing unit 154 determines that the period during which the leakage current of the first branch relay 131 is equal to or greater than the predetermined threshold is It is determined whether or not it continues for a certain period of time (for example, 0.1 seconds) (SS532). If the period during which the leakage current of the first branch relay 131 is equal to or greater than the predetermined threshold is less than the certain period of time ("NO" in SS532), the signal processing unit 154 causes the touch panel 200 to display "ON display of the first branch relay". (SS550).

When the period in which the leakage current of the first branch relay 131 is equal to or greater than the predetermined threshold continues for a certain period of time or more ("YES" in SS532), the signal processing unit 154 turns the first branch relay 131 "OFF" by the open/close control signal CS1. "Control (SS533). Then, signal processing unit 154 causes touch panel 200 to display “first branch relay earth leakage cut off” (SS534), and sets the brightness of touch panel 200 to brightness 2 (SS535). A display example of the touch panel 200 is the same as the above-described "short-circuit/overcurrent diagnosis" of the first branch relay 131 (see FIGS. 18A and 18B). After completing the setting in step SS535 , the signal processing unit 154 ends the “branch relay ON diagnosis” of the first branch relay 131 . The processing after the “ON diagnosis of the branch relay” is the same as the “short-circuit/overcurrent diagnosis” of the first branch relay 131 described above.

－Tracking Diagnosis－
Next, "tracking diagnosis" of the first branch relay 131 will be described. Tracking diagnosis is for detecting the presence or absence of tracking, and a specific circuit configuration, diagnosis method, and the like are disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-103657.

First, the signal processing unit 154 determines whether tracking occurs in the first branch relay 131 based on the branch abnormality signal D22 from the branch abnormality detection unit 142 (SS541). If tracking has not occurred in the first branch relay 131 ("NO" at SS541), the signal processing unit 154 causes the touch panel 200 to display "ON display of the first branch relay" (SS550).

On the other hand, when tracking occurs in the first branch relay 131 ("YES" at SS541), the signal processing unit 154 turns the first branch relay 131 "OFF" using the open/close control signal CS1 (SS542). Then, signal processing unit 154 causes touch panel 200 to display "1st branch relay tracking cutoff" (SS543), and sets the brightness of touch panel 200 to brightness 2 (SS544). A display example of the touch panel 200 is the same as the above-described "short-circuit/overcurrent diagnosis" of the first branch relay 131 (see FIGS. 18A and 18B). After completing the setting in step SS544 , the signal processing unit 154 ends the “branch relay ON diagnosis” of the first branch relay 131 . The processing after the “ON diagnosis of the branch relay” is the same as the “short-circuit/overcurrent diagnosis” of the first branch relay 131 described above.

The "branch relay ON diagnosis" of each branch relay 131 is performed each time each branch relay is turned ON. Specifically, for example, when the user turns ON the branch relay via the touch panel 200, "branch relay ON diagnosis" is executed. FIG. 9A is a diagram showing a flow of "branch relay ON diagnosis" when the branch relay is turned ON.

As shown in FIG. 9A, when the first branch relay 131 is turned ON (SS11), the signal processing unit 154 performs "branch relay ON diagnosis" (SS21) for the first branch relay 131. . A specific flow is the same as the "branch relay ON diagnosis" shown in FIG. Then, if no abnormality is confirmed in this "branch relay ON diagnosis" (SS21), the flow proceeds to step SSD1, and the signal processing unit 154 causes the touch panel 200 to display "first branch relay ON display". , terminate the process. On the other hand, if there is an abnormality as a result of the "branch relay ON diagnosis", the content of the abnormality is displayed on the touch panel 200 based on the flow of FIG. Even when the second to Nth branch relays 131 are turned ON (SS12 to SS1N), as in the case of the first branch relay 131, the "branch relay ON diagnosis" (SS22 to SS2N) is performed and an abnormality is detected. is not confirmed, "branch relay ON display" is displayed for the branch relay 131 that has been turned ON (SSD1), and then the process ends. At this time, signal processing unit 154 does not change the brightness of touch panel 200 . On the other hand, if there is an abnormality as a result of the "branch relay ON diagnosis", the content of the abnormality is displayed on the touch panel 200 based on the flow of FIG.

FIG. 9(b) is a diagram showing a flow when the branch relay is turned off. As shown in FIG. 9B, when the first branch relay 131 is turned OFF (SS31), the signal processing unit 154 controls the first branch relay 131 to "OFF" by the open/close control signal CS1 (SS41). . Then, the signal processing unit 154 causes the touch panel 200 to display "OFF display of the first branch relay" (SSD2), and ends the process. At this time, signal processing unit 154 does not change the brightness of touch panel 200 . Even when the second to N-th branch relays 131 are turned OFF (SS32 to SS3N), the signal processing unit 154, similarly to the case of the first branch relay 131, outputs the branch relays turned OFF by the open/close control signal CS1. 131 is controlled to "OFF" (SS42 to SS4N). Then, the signal processing unit 154 causes the touch panel 200 to display "branch relay OFF display" for the branch relay 131 that has been turned OFF (SSD2), and ends the process. At this time, signal processing unit 154 does not change the brightness of touch panel 200 .

<Electricity Diagnosis at Regular Time>
10 to 13 show a diagnosis flow for steady-state diagnosis of the main switch 110 and the branch switch 130 (branch relay 131) (for example, diagnosis of abnormalities such as short circuit, overcurrent, leakage, overvoltage, tracking, etc.). It is a diagram. The normal diagnosis is a diagnosis related to normal operation of the main switch 110 and the branch relay 131, and is a diagnosis that is always performed after the main switch 110 is turned ON. As shown in FIGS. 10 to 13, in the steady-state diagnosis, each diagnosis (energization diagnosis, short circuit diagnosis, overcurrent diagnosis, leakage diagnosis, overvoltage diagnosis) of the master switch 110 and the first to Nth branch relays 131 Each diagnosis is performed in parallel.

-Energization diagnosis of main switchgear-
As shown in FIG. 10, when the “steady-state energization diagnosis” is started in step SM300, in the distribution board 100, the energization state of the master switch 110 is determined based on the master current signal D11 from the master current measuring unit 121. Confirmed (SM310). In step SM310, if the main switch 110 is energized (“energized” in SM310), the flow returns to step SM310 to confirm the energized state of the main switch 110. FIG. In other words, the determination of step SM310 is continued in the distribution board 100 during the period of "energized" in step SM310.

On the other hand, when the main switch 110 is not energized (“no power” in SM310), the distribution board 100 detects the power failure detection signal D3 from the power failure detection unit 152 based on the power failure detection signal D3 from the primary side (external power supply to the main switch). 110) is confirmed (SM211). Thereafter, the diagnosis flow from steps SM211 to SM215 is the same as the "initial energization diagnosis of main switchgear".

－Short-circuit diagnosis of trunk switch－
Next, short-circuit diagnosis of the trunk switch 110 will be described in detail.

As shown in FIG. 11, the signal processing unit 154 determines whether or not a short-circuit current is detected based on the main current signal D11 from the main current measuring unit 121. It is determined whether or not it is equal to or higher than a threshold value (for example, 5 kA, which is described as short-circuit current detection in the drawing) (SM411). If the short-circuit current of main switch 110 is less than the predetermined threshold value (“NO” in SM411), the flow returns to the determination of step SM411, and signal processing unit 154 determines whether the energized current of main switch 110 is greater than or equal to the predetermined threshold value. determine whether or not In other words, the signal processing unit 154 continues the determination in step SM411 during the period of "NO" in SM411, that is, during the period during which no short-circuit current is detected.

On the other hand, if the energization current value indicated by the main trunk current signal D11 is equal to or greater than the predetermined threshold value ("YES" in SM411), the subsequent flow will be step SM223 and step SM224 of "initial energization diagnosis of main trunk switch". (See FIG. 7).

－Overcurrent Diagnosis of Main Switchgear－
Next, the overcurrent diagnosis of the trunk switch 110 will be described in detail.

As shown in FIG. 11, based on the main current signal D11 from the main current measuring unit 121, the signal processing unit 154 determines that the energized current of the main switch 110 is a predetermined threshold value (for example, 75 A corresponding to 125% of the rated current). , a fixed value in the figure) or more (SM421). If the energized current of the main switch 110 is less than the predetermined threshold ("NO" in SM421), the flow returns to step SM421 to determine whether or not the energized current of the main switch 110 is equal to or greater than the predetermined threshold. In other words, the signal processing unit 154 continues the determination of step SM421 during the period of "NO" in SM421, that is, during the period during which no overcurrent is detected.

On the other hand, when the current value indicated by the master current signal D11 is equal to or greater than the predetermined threshold value ("YES" in SM421), when the peak cut function described later is "OFF" ("NO" in SM422), The signal processing unit 154 determines whether or not the period in which the energization current of the master switch 110 is equal to or greater than a predetermined threshold continues for a certain period of time or longer (SM423). In the present embodiment, the energization current equal to or higher than the predetermined threshold continues for a period of time or longer means, for example, that the energization current of 75 A or more corresponding to 125% of the rated current continues for 2 hours or more, and the rated current 120A or more, which corresponds to 200% of the current, continues for 6 minutes or more.

In step SM423, if the period in which the energization current of the master switch 110 is equal to or greater than the predetermined threshold continues for a certain period of time or longer ("YES" in SM423), the subsequent flow is the step of "initial energization diagnosis of the master switch". Same as SM225 and step SM226 (see FIG. 7). On the other hand, if the period in which the energization current of the master switch 110 is equal to or greater than the predetermined threshold does not continue for a certain period of time or more (“NO” in SM423), the flow returns to the determination in step SM421.

Further, when the energizing current value indicated by the master current signal D11 is equal to or greater than a predetermined threshold value ("YES" in SM421), when the peak cut function is "ON" ("YES" in SM422), the signal processing unit 154 determines whether or not peak cut operation is set by the user (SM427). If the peak cut operation is set ("YES" in SM427), the flow advances to peak cut processing in step SM428, which will be described later. On the other hand, if the peak cut operation is not set (“NO” in SM427), the flow proceeds to step SM423. In the present disclosure, the peak cut function means that when the energized current of the main switch 110 exceeds a predetermined current, the signal processing unit 154 cuts off the branch relay 131 provided in advance, and the main switch 110 cuts off. It is a function to prevent The predetermined current may be a current determined at the time of shipment from the factory, or may be a current determined in advance by the user. Also, it may be variable. In addition, regarding the order in which the branch relays 131 are cut off, predetermined priorities may be set for the branch relays 131 and cut off based thereon. The predetermined current may be determined in advance within a current range in which overcurrent does not occur.

FIG. 14(a) is a diagram showing a flow of peak cut operation setting by the user.

As shown in FIG. 14A, for example, when the user performs an operation to start peak cut setting on the touch panel 200, the flow proceeds from step SP11 to step SP12, and the signal processing unit 154 detects the peak cut current value settings. Specifically, for example, the signal processing unit 154 displays on the touch panel 200 a display prompting the input of the peak cut current value, and receives the setting operation of the peak current value from the user. After receiving the setting operation, the signal processing unit 154 determines whether or not the set current value is equal to or less than the trunk rated current (SP13). When the set current value is equal to or less than the trunk rated current, the flow proceeds to step SP15, and the signal processing unit 154 sets the cutoff priority of the branch relay 131. FIG. Specifically, for example, the signal processing unit 154 displays on the touch panel 200 a display prompting the input of M pieces (integers of M>0 and M≦N) of cutoff priorities of the branch relays 131, and the setting by the user is performed. be manipulated. After receiving the setting operation, the signal processing unit 154 performs a setting operation such as storing the setting value (SP16), and after completing the setting, ends the processing.

FIG. 14B is a diagram showing the flow of peak cut processing in step SM428. In this embodiment, the priority set in step SP15 is two (M=2). Assume that the second-ranked branch relay is the R-th branch relay 131 (an integer of 0<R≦N and R≠Q).

As shown in FIG. 14(b), the signal processing unit 154 reads the current value of the main switch 110 based on the main current signal D11 from the main main current measuring unit 121 (SP21), and the read current value (hereinafter simply referred to as read current value) is equal to or greater than the set current value (SP22). If the read current value is less than the set current value ("NO" at SP21), the flow returns to the determination of step SP21, and the signal processing unit 154 determines whether the read current value is greater than or equal to the set current value.

On the other hand, if the read current value is equal to or greater than the set current value ("YES" in SP21), the signal processing unit 154 selects the Q branch relay 131 with the highest priority based on the priority set in step SP15. "OFF" control is performed (SP23), and "branch relay OFF display" is performed for the Q-th branch relay 131 that has been turned OFF (SP24), and the flow proceeds to step SP25. At step SP25, the signal processing unit 154 reads again the current value of the master switch 110 and determines whether the read current value is equal to or greater than the set current value.

If the read current value is greater than or equal to the set current value ("YES" in SP25), the signal processing section 154 terminates the peak cut processing, and the flow returns to SM421.

On the other hand, if the read current value is less than the set current value ("NO" at SP25), the flow returns to step SP23 via steps SP26 and SP27, and the signal processing unit 154 follows the priority order set at step SP15. Based on this, the R-th branch relay 131 having the second priority is controlled to be turned OFF, and the R-th branch relay 131 that has been turned OFF is displayed as a branch relay OFF (SP24), and the flow proceeds to step SP25. proceed to

In this way, the signal processing unit 154 repeats the flow from step SP23 to step SP27 until the read current value becomes equal to or greater than the set current value, or until M becomes "0". After that, the peak cut processing ends (the flow returns to SM421).

－Earth leakage diagnosis of master switchgear－
Next, the earth leakage diagnosis of the trunk switch 110 will be described.

As shown in FIG. 12, this "earth leakage diagnosis of the main switch" differs from the "initial energization diagnosis of the main switch" (see FIG. 7) in that if the determination result of step SM231 is "NO", And when the determination result of step SM232 is "NO", the flow returns to the determination of step SM231.

－Overvoltage diagnosis of master switchgear－
Next, the "overvoltage diagnosis" of the trunk switch 110 will be described.

As shown in FIG. 12, this "overvoltage diagnosis" is different from the "main switch initial energization diagnosis" (see FIG. 7) in the case of "NO" in step SM241 and the case of "NO" in step SM242. , the flow returns to the determination of step SM241.

- Power supply diagnosis for branch relays -
Next, energization diagnosis of the branch relay 131 will be described. Here, as the energization diagnosis of the branch relay 131, the energization diagnosis of the first branch relay 131 will be described, but the 2nd to Nth branch relays 131 are also subjected to the same energization diagnosis in parallel. The same applies to "branch relay short-circuit diagnosis", "branch relay overcurrent diagnosis", "branch relay leakage diagnosis", and "branch relay tracking diagnosis".

As shown in FIG. 13, the signal processing unit 154 checks the energized state of the first branch relay 131 based on the branch current signal D21 from the branch current measurement unit 141 (SS610). When the first branch relay 131 is not energized ("not energized" at SS610), the signal processing unit 154 causes the touch panel 200 to display "OFF display of the first branch relay" (SS612), and diagnoses the first branch relay 131. exit. On the other hand, when the first branch relay 131 is energized (“energized” at SS610), the “short circuit diagnosis”, “overcurrent diagnosis”, “leakage diagnosis” and “tracking diagnosis” of the first branch relay 131 are performed. carried out in parallel. Each diagnosis will be described in detail below with reference to the drawings.

－Short circuit diagnosis of branch relay－
Next, short circuit diagnosis of the first branch relay 131 will be described in detail.

As shown in FIG. 13, the signal processing unit 154 determines whether or not a short circuit current is detected based on the branch current signal D21 from the branch current measuring unit 141. (SS611). If the energized current of the first branch relay 131 is less than the predetermined threshold ("NO" at SS611), the flow returns to step SS611 to determine whether or not the energized current of the first branch relay 131 is equal to or greater than the predetermined threshold. do. In other words, the signal processing unit 154 continues the determination of step SS611 during the period of "NO" in SS611, that is, during the period during which no short-circuit current is detected.

On the other hand, if the energized current value indicated by the branch current signal D21 is equal to or greater than the predetermined threshold value ("YES" at SS611), the subsequent flow will proceed to step SS523 of "branch relay ON diagnosis" (see FIG. 8). to SS525.

- Branch relay overcurrent diagnosis -
Next, the overcurrent diagnosis of the first branch relay 131 will be described in detail.

As shown in FIG. 13, based on the branch current signal D21 from the branch current measurement unit 141, the signal processing unit 154 determines that the current flowing through the first branch relay 131 is a predetermined threshold value (for example, equivalent to 125% of the rated current). 25A, which is described as a constant value in the figure) or more (SS621). If the energized current of the first branch relay 131 is less than the predetermined threshold ("NO" at SS621), the flow returns to step SS621 to determine whether or not the energized current of the first branch relay 131 is equal to or greater than the predetermined threshold. do. In other words, the signal processing unit 154 continues the determination of step SS621 during the period of "NO" in SS621, that is, during the period during which no overcurrent is detected.

On the other hand, if the energization current value indicated by the branch current signal D21 is equal to or greater than the predetermined threshold ("YES" in SS621), the signal processing unit 154 determines that the energization current of the first branch relay 131 is equal to or greater than the predetermined threshold. It is determined whether or not a certain period continues for a certain period of time or longer (SS622). In the present embodiment, the energization current equal to or greater than the predetermined threshold continues for a certain period of time or longer means, for example, that the energization current of 25 A or more corresponding to 125% of the rated current continues for 2 hours or more, and the rated current 40A or more corresponding to 200% of the continuous current for 2 minutes or more.

In step SS622, if the period in which the energization current of the first branch relay 131 is equal to or greater than the predetermined threshold continues for a certain period of time or longer ("YES" in SS622), the subsequent flow is "branch relay ON diagnosis" (FIG. 8). ) are the same as steps SS526 to SS528. On the other hand, if the period in which the current flowing through the first branch relay 131 is equal to or greater than the predetermined threshold does not continue for a certain period of time or more ("NO" in SS622), the flow returns to the determination in step SS621.

－Earth leakage diagnosis of branch relay－
Next, the leakage diagnosis of the first branch relay 131 will be described in detail.

As shown in FIG. 13, this "branch relay earth leakage diagnosis" differs from the "branch relay ON diagnosis" (see FIG. 8) in that the determination result of step SS531 is "NO" and that step SS532 is "NO", the flow returns to the determination of step SS531.

－Tracking diagnosis of branch relay－
Next, tracking diagnosis of the first branch relay 131 will be described in detail.

As shown in FIG. 13, this "tracking diagnosis" differs from the "branch relay ON diagnosis" (see FIG. 8) in that if "NO" is determined in step SS541, the flow returns to the determination of step SS541. is.

(Other embodiments)
FIG. 19 shows an example in which a semiconductor relay is used as the branch relay 131, and the branch relay 131 and the branch energization detector 140 (the branch current measurement unit 141 and the branch abnormality detection unit 142) are mounted on the printed circuit board 166. . In this configuration, the load-side wiring of each branch abnormality detection section 142 is connected to a connector 167 integrally provided on a printed circuit board 166 . The connector 167 and the load side connector 156 are connected by a cable 168 or the like, for example. With such a configuration, the size of the distribution board 100 can be further reduced. 19, the connector 167 may be omitted and the printed circuit board 166 may be extended so that the printed circuit board 166 is directly connected to the load side connector 156. FIG. Further, in addition to the branch relay 131 and the branch energization detection unit 140, for example, the signal processing unit 154, the communication unit 164, the panel input/output unit 165, and the like may be mounted on the printed circuit board 166.

Further, as shown in FIG. 19, the distribution board 100 is arranged between the main switch 110 and the input side of the power failure detection unit 152 and the power supply side connector 151, and is controlled by the signal processing unit 154. A switching unit 169 configured to enable ON/OFF control of connection/disconnection of an electric circuit connecting an external power supply, the main switch 110 and the power failure detection unit 152 may be further provided. When a predetermined external trigger is received, the signal processing unit 154 turns off the switching unit 169 to cut off the electric circuit connecting the external power source with the main switch 110 and the power failure detection unit 152. The board 100 is disconnected from an external power supply (for example, commercial power supply). The above predetermined trigger is, for example, a trigger received when a commercial power supply fails. As a result, for example, when the distribution board 100 is connected to another power supply such as a private power generator, when the commercial power supply fails, the privately generated power is prevented from flowing backward to the commercial power supply side. can. That is, the isolated operation of the distribution board 100 can be prevented. Note that the switching unit 169 may be arranged between the wiring connecting the main switch 110 and the power supply side connector 151 and the input side of the power failure detecting unit 152 (not shown). Even when the switching unit 169 is arranged in this way, it is possible to prevent reverse power flow during a power failure and to prevent the distribution board 100 from operating alone.

In the above-described embodiment, the display example on the touch panel 200 when the trunk switch 110 is cut off is shown in FIG. 17A, and the display example on the touch panel 200 when the branch relay 131 is cut off is shown in FIG. a), but is not limited to this. For example, it may be displayed as shown in FIG. 18(a) when the trunk switch 110 is cut off, or may be displayed as shown in FIG. 17(a) when the branch relay 131 is cut off.

In the above-described embodiment, an example in which the distribution board 100 includes the branch switch 130 and the branch energization detection unit 140 has been described. The functions of unit 140 may be included. Also, the functions of the signal processing unit 154, the communication unit 164, and the panel input/output unit 165 may be integrated to provide one control unit that includes these functions.

Since the distribution board according to the present disclosure ensures safety and high convenience, it is useful as a distribution board that is used indoors and outdoors for residential use, store use, and the like.

REFERENCE SIGNS LIST 100 distribution board 101 housing 110 main switch 113 operation lever 120 main energization detector 130 branch switch 131 branch relay (switching unit)
140 branch energization detection unit 151 power supply side connector 153 battery 154 signal processing unit (control unit)
156 Load side connector 200 Touch panel D1 Main energization signal D2 Branch energization signal CS1 Open/close control signal

Claims (2)

A distribution board comprising a main switch and a plurality of branch switches connected to the output side of the main switch,
A branch energization detection unit that detects the presence or absence of an abnormality in the energization state of the branch switch and outputs a branch energization signal; and a control unit that outputs
The main switch cuts off the electric circuit of the main switch by a trip operation that mechanically automatically cuts off when there is an abnormality in the energized state of the main switch, and also cuts off the electric circuit in response to the switching operation of the user. It is a switch that can be opened and closed,
The branch switch receives the opening/closing control signal, cuts off the electric circuit of the branch switch when there is an abnormality in the energization state of the branch switch, and can open/close the electric circuit in response to a user's opening/closing operation. a switch,
A distribution board, comprising: a communication unit that transmits a detection result of the branch energization detection unit to the outside. In the distribution board according to claim 1,
The control unit further comprises a touch panel that displays the state of the branch switch and receives a user's operation on the display part thereof,
outputting a switching control signal for on/off-controlling the connection of the electrical circuit of the branch switch to the branch switch based on the operation on the touch panel;
A distribution board, wherein the branch switch controls opening/closing of an electric circuit of the branch switch based on at least one of the branch energization signal and the switching control signal corresponding to the operation of the touch panel.

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