JP3031684B2 - Switchboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention automatically cuts off and conducts electricity to a branch circuit corresponding to a specific branch breaker, and changes the current flowing through the master breaker to the value of the main breaker. The present invention relates to a distribution board that controls a current to be less than a breaking current value.

(Prior Art) A conventional distribution board installed in a general home or the like is provided with a main breaker and a plurality of branch breakers respectively connected to branch circuits of the main breaker. Each main circuit breaker has a structure that protects all branch circuits from overcurrent, short circuit, earth leakage, electric shock and overvoltage.

Also, for example, as described in Japanese Patent Application Laid-Open No. 54-149847, the main current is monitored, and when a set current value is exceeded, a predetermined specific load is cut off to prevent a total power failure. Such a distribution board is known.

(Problems to be Solved by the Invention) In the above-mentioned conventional home distribution board, when the main breaker detects overcurrent, short circuit, earth leakage, electric shock and overvoltage of all branch circuits, the main breaker operates and all branch circuits are operated. There is a problem that the power supply is cut off, resulting in a total power failure. In particular, a recovery operation must be performed in the dark at night, and all loads that cause inconvenience due to current cutoff, such as a refrigerator, are also cut off.

Also, those described in JP-A-54-149847,
It merely shuts off a specific load and does not consider specific convenience.

Therefore, when the current value flowing through the main breaker exceeds a predetermined level, the branch circuit is cut off by a cut-off device provided on the output side of a specific branch breaker, and when the current value flowing through the main breaker falls below a predetermined level, the cut-off device By making the branch circuit conductive, a distribution board having a control unit that controls the current value flowing through the main breaker to a value less than the cutoff current value of the main breaker was considered.For example, the branch circuit was cut off by the control unit. There is a problem that the user goes out without noticing that there is a stopped load, the branch circuit is conducted after the user goes out, the load operates, and wasteful power is consumed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a branch circuit corresponding to a specific branch breaker cut off or turned on to automatically control a current value flowing through a main breaker to a value lower than a cutoff current value of the main breaker. As a result, it is possible to prevent a total power failure due to the shutoff of the main breaker, and to simultaneously shut off a specific branch circuit that is in a conductive state irrespective of the current value flowing through the main breaker, and It is an object of the present invention to provide a distribution board capable of conducting the branch circuits collectively.

(Means for Solving the Problems) A distribution board according to the present invention comprises: a main breaker; a plurality of branch breakers provided corresponding to a plurality of branch circuits and respectively connected to the main breaker; a current value flowing through the main breaker A plurality of cut-off devices provided at the output side of a plurality of specific branch breakers and capable of breaking a corresponding branch circuit; when a current value detected by the current detector exceeds a predetermined level The main circuit breaker performs a breaking operation of the plurality of breaking devices according to a preset order, and conducts the plurality of breaking devices according to a preset sequence when the current value detected by the current value detector falls below a predetermined level. And a control unit for controlling a current value flowing through the main circuit breaker to a value less than a breaking current value of the main breaker. And a batch conduction operation unit for conducting all the blocking devices in the blocking state collectively.

(Operation) In the distribution board of the present invention, when a current value flowing through the main breaker detected by the current detector exceeds a predetermined level (for example, a current value smaller than a breaking current value of the main breaker), a plurality of specific branch breakers are provided. By automatically performing the breaking operation of the plurality of breaking devices provided in the branch circuit corresponding to the main circuit breaker in accordance with a preset order, the current value flowing through the main breaker is automatically controlled to be less than the breaking current value of the main breaker. Prevent all blackouts due to interruption. Further, when the value of the current flowing through the main breaker detected by the current value detector falls below a predetermined level, the plurality of shutoff devices are turned on in accordance with a preset order and are returned.

In addition, regardless of the detection of the current detector, all the shut-off devices in the conducting state are cut off collectively by the collective shut-off operation unit, and all the shut-off devices in the cut-off state are collectively turned on by the collective conduction operation unit. I do. Therefore, for example, if the shut-off device is shut off when going out, the shut-off device automatically shut off by the control unit automatically returns in the absence and does not wastefully consume power. Becomes possible.

Embodiment The configuration of an embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a distribution panel housing formed of a steel plate and having a front opening, and formed at both ends of the distribution panel housing 1 with a steel plate opening and closing a front opening. Door to 2,3
Is rotatably mounted on the shaft, and the door plate 3 on the other side of the door plate 2 on one side
Are formed so that the front edges are joined and locked when both door plates 2 and 3 are closed. The other door plate 3 has a display and operation opening 4 formed therein.

As shown in FIG. 1, FIG. 3 and FIG. 4, a rated current due to overcurrent, short circuit, short circuit, electric shock and overvoltage of all branch circuits such as an earth leakage breaker is provided in the distribution board housing 1. A main breaker 5 that cuts off when a current exceeding the value flows, and a plurality of (for example, 18) branch breakers 6 ₁ , 6 ₂ , 6 ₃ , 6 ₄ , 6 ₅ , which are connected to the main breaker 5, respectively. 6 ₆ , 6 ₇ , 6
₈ , 6 ₉ , 6 ₁₀ , 6 ₁₁ , 6 ₁₂ , 6 ₁₃ , 6 ₁₄ , 6 ₁₅ , 6 ₁₆ , 6 ₁₇ , 6 ₁₈ (hereinafter 6 ₁
Abbreviated and displayed so on 6 _18), a current detector 7 for detecting a current flowing through the main breaker 5, a selected one of the plurality of branch circuits corresponding to a plurality of branch breakers ₆₁ through ₁₈ and a shut-off device 8 constituted by disconnectable relay device at least one of the connected branch circuits specific example, branch breakers ₆₁ through _4, the power transformer 9 for driving the shut-off device 8 When the current detector 7 detects a current value of a predetermined level, the breaker 8 is operated to reduce the current value flowing through the main breaker 5 to a set current value smaller than the breaking current value (rated breaking current value) of the main breaker 5. And a control unit 10 for controlling the operation.

The main breaker mounting base plate 1 is attached to two support bars 11 and 12 having a substantially U-shaped cross section which are mounted on the inner bottom surface of the distribution board housing 1.
The upper and lower portions are fixed, and the main breaker 5 is mounted on the front surface of the main breaker mounting base plate 13. The branch breaker group mounting bases are attached to the support bars 11, 12 adjacent to the other side of the main breaker mounting base plate 13. upper and lower portions of the plate 14 is fixed, a plurality of branch breakers ₆₁ through ₁₈ above and below the branch breakers groups mount plate 14 is attached in parallel to the two rows. This is the intermediate portion of the branch breakers groups mount plate 14 recessed step 15 is formed, the recessed step 15 is the bus bar 16 on the front side to the branching bus bar 17 and 18 up and down the rear breaker ₆₁ through ₁₈ mounted in parallel is located between the total branch breakers ₆₁ through ₁₈ on the bus bar 16 of the front
There are connected, the rear branch breakers ₆₁ disposed on the upper side on the upper side of the bus bar 17, 6 _3, 6 _5, 6 _7, 6 _9, ... 6 ₁₇ is connected, distribution below the rear lower bus bar Installed branch breakers 6 ₁ , 6 ₂ , 6 ₄ , 6 ₆ ,
6 _8, 6 _10, ...... 6 ₁₈ is connected.

Further, the upper and lower portions of the breaker mounting base plate 19 are fixed to the support bars 11, 12 adjacent to the other side of the branch breaker group mounting base plate 14,
The breaking device 8 is mounted on the upper part of the mounting plate 19, and the power transformer 9 is mounted on the lower side.

Further, the support rail is located on the other side of the shut-off device mounting base plate 19.
Upper and lower parts of the control unit case mounting base plate 20 are fixed to 11, 12
The control unit case 21 is mounted on the control unit case mounting base plate 20.

Then, the main breaker 5 by respective mount plates 13 and 14, branch breakers ₆₁ through _18, blocking device 8, the power transformer 9 and the control unit casing 21 is adapted to the front position is aligned.

Further, bus bars 16, 17 and 18 are connected to the main breaker 5 respectively at the wire 30 fitted with a current detector 7, the power transformer 9 is connected to the branch breakers 6 ₁₈ adjacent the blocking device to the power transformer 9 8 Are connected to the respective relay devices 22, 23, 24, 25.

Further, a terminal block 26 is mounted on an upper portion of the blocking device mounting base plate 19.

Next, as shown in FIGS. 1 and 5, the control unit case 21 is provided with a window hole 27 on the front surface.
Ten operation panels 28 are provided.

The control unit 10 controls a current value flowing through the main breaker 5 to be less than a set value, and is formed by mounting control electronic components 31 and the like on wiring boards 32 and 33. The control unit case 21 is provided so as to cover the electronic component 31.
Therefore, even if the door plate 3 is pushed from the front side, the electronic component 31 is protected. The wiring board 32 is provided with a setting operation unit 33 and a display unit 34 facing the operation panel 28. As shown in FIG. 6, the setting operation unit 33 of the operation panel 28 includes a ten-key switch operation button 35, a return switch operation button 36, a setting switch operation button 37, a rank switch operation button 38, and a collective shutoff operation unit. It is formed of a cutoff switch operation button 39, a collective conduction switch operation button 40 as a collective conduction operation section, and a setting detection switch operation button 41. Further, the display unit 34 is formed of a light emitting diode, and a set current value display unit 42,
It has a circuit display section 43 and a rank display section 44, and further has a working current value display section 45 in which light emitting diodes are juxtaposed horizontally in the lower side, and a light emitting diode below this working current value display section 45. And a shut-off circuit display section 46 formed side by side in the horizontal direction.

Then, as shown in FIG. 7, the control unit 10 has an arithmetic processing unit 47 constituted by a CPU.
A setting operation unit input unit 48 for inputting a setting signal from the setting operation unit 33, and an A / D converter 49 connected to the current detector 7
, A memory 50, a timing unit 51 such as a transmitter, and a display unit 34
And the relay output unit 5 connected to the relay devices 22, 23, 24, 25
2. A power line carrier output unit 53, a current value input unit 54, and a power supply input unit 55 are connected to each other, and a backup power supply battery 56 is connected to the memory 50.

 Next, the electrical connection configuration will be described with reference to FIG.

A power transformer 9, the power input unit 55 of the control unit 10 is connected to a branch breaker 6 ₁₈ which is close adjacent, the power transformer 9 is connected to the relay device 22, 23, 24, 25.

In addition, the current detector 7 receives a current value of the control unit 10 by an electric wire (not shown) wired in a space formed between each of the mounting base plates 13 and 14 and the inner bottom surface of the distribution board housing 1. It is connected to the unit 54.

Further, the relay devices 22, 23, 24, and 25 are connected to a relay output unit 52 of the control unit 10.

Then, among the plurality of branch breakers ₆₁ through _18, when the current detector 7 branch circuit connected particular chosen example, branch breakers ₆₁ through ₄ detects the current value of a predetermined level, when the relay device 22, 23, 24, 25 is such that blocking each distribution board housing coupled to the branch breakers ₆₁ through ₄ electric wire (not shown) and the mount plate 13 and 14 Wires are formed in the space formed between the inner bottom surface of the body 1 and connected to the relay devices 22, 23, 24 and 25, respectively.

Further, among the plurality of branch breakers ₆₁ through _18, specific load which is selected, for example, in the case to allow blocking the branch breakers 6 _5, 6 ₆ connected to an air conditioner, branch breakers
6 _5, 6 each terminal equipment enters a cutoff _{device 6} receives a control signal from the control unit 10 connected to the branch circuit to control the specific load which is selected 60 (Home Auto Mei Deployment System ... HA
System: Connected to the Japan Electrical Manufacturers' Association). The terminal device 60 is installed near the load or attached to the load. The terminal device 60 includes an interface (IFU) serving as a receiving unit for receiving a control signal from the control unit 10 and a control monitor connected to a specific load. The interface (IFU) and the control monitor unit are connected by a control signal line and a monitor line. And each of these terminal devices 60
Interface (IFU) is connected to the power line carrier output unit 53 of the control unit 10 via its own power line that connects the power supply to the control unit 10, and the control signal from the control unit 10 is transmitted to the terminal device 60 as a power line carrier control signal. Transmitted. The automatic return of the load connected to the branch breakers 6 _5, 6 ₆ can be performed by the signal from the control unit 10 connects the terminal equipment 60 to the branch breakers 6 _5, 6 _6.

Further, the main breaker 5, branch breakers ₆₁ through _18, blocking device 8, and the operation unit 61 of the master breaker 5 in front of the power transformer 9, a window for projecting the operating portion 62 of the branch breakers ₆₁ through ₁₈ Panel 63 is mounted.

 Next, the operation of this embodiment will be described.

The description will be made according to the current value setting flowchart shown in FIG.

For example, by operating the setting switch operation button 37 of the setting operation unit 33 of the control unit 10 and then operating the ten-key switch operation button 35, for example, a set current value smaller than the breaking current value of the main breaker 5 within the range of 1A to 99A. Is input (step 1). With this current value setting operation, the setting input value is read from the setting operation unit input unit 48 of the control unit 10 (step 2), and by operating the return switch operation button 36, the setting input value is calculated.
(Step 3), the system mode is updated to the subsequent system mode (step 4), and the set current value is displayed on the set current value display section 42 of the display section 34 (step 5). Then, the data in the memory 50 is updated (step 6). In this state, the process is circulated again to the current value setting operation step (step 1). In this state, the used current value display section 45 switches the display unit according to the set current value, and the maximum display value is displayed.
Set to 50A or 100A. If the current value is set outside the range, for example, if the current value is outside the range of 1 A to 99 A, an error process is performed, and the used current value display section 45 blinks.

Next, a description will be given with reference to the reading flowchart shown in FIG.

When the current detector 7 detects the set current value,
The off order of the connected branch circuit branch breakers ₆₁ through ₄ are blocked is determined whether or not being set (step 10),
If the order is not being set and the return switch operation button 36 is operated (step 11), the set data is evaluated whether the set current value is within the rated range, for example, within the range of 1A to 99A ( In step 12), when it is determined that the set current value is out of the range (step 13), an error display mode is set (step 14).

If it is determined that the set current value is within the range (step 13), the newly set data is stored and set in the memory 50 (step 15), and the mode shifts to the normal mode (step 16). When the branch circuit shutoff order is not being set and the return switch operation button 36 is not operated (step
11), and waits for current value setting (step 17). And
These operations are repeated.

When it is determined that the branching sequence of the branch circuit is being set (step 10) and the order switch operation button 38 is operated,
When "01" is displayed on the circuit display section 43 and "01" is displayed on the order display section 44, and the ten-key switch operation button 35 is operated, it is evaluated whether or not the order setting data is appropriate (step 19). If the number is set twice or more, or if the middle rank is missing, it is processed as an error (step 20),
The error display mode is set, and the used current value display section 45 blinks (step 21).

In addition, ranking setting data is evaluated as appropriate (step
19), and treat it as not an error (step 20)
The newly set order data is stored and set in the memory 50 (step 22). Then, the process returns to the normal mode (step 23).

Next, when the order switch operation button 38 is operated again, the next branch circuit number “02” is displayed on the circuit display section 43 and the currently set order is displayed on the order display section 44.

By repeating this operation (steps 18 to 22), the cutoff order is set. If the return switch operation button 36 is not operated during the repetition of this operation, the order setting waits (step 23).

Incidentally, in this order setting, blocking sequence of the particular load which is selected, that is connected to the branch breakers 6 _5, 6 ₆ load ranking is fixed to "05", "06" can not rank changes. Further, the branch breakers 6 _5, 6 of ₆ automatic return delay time of the load connected to the setting performed by the operation of the rank "05", "06", and inputs.

By operating the order switch operation button 38, the cutoff order of each branch circuit can be confirmed on the display of the circuit display unit 43 and the order display unit 44.

Further, the branch circuit or the load whose order is set to “00” is not interrupted.

Next, a monitoring flowchart will be described with reference to FIG.

The current value flowing through the main breaker 5 is detected by the current detector 7, and the current detector 7 is connected to the current value input unit 54 of the control unit 10.
And the current value flowing through the main breaker 5 is calculated (step 30). Regardless detected current value of the current detector 7, the batch-off switch operation button 39 is operated (step 31), for interrupting operation of the first order branch breakers ₆₁ connected to the example relay device 22. Then, the timer signal from the timer 51 is counted from the interruption operation, and when a set time, for example, 0.5 seconds has elapsed (step 3).
3), to cut off operating the second rank of branch breakers 6 ₂ to the connected eg relay device 23. In this way, when the batch cutoff switch operation button 39 is operated, the cutoff control signal is sequentially updated until the final-order branch circuit or the load is cut off, and the relay devices 23, 24 and 25 cut off (step 34, 35, 36), further continues after a lapse of the set delay time, the signal from the power line output unit 53 is output cut-off signal to the terminal device 60 is connected to the branch breakers 6 ₅ and with load is cut off, it is subsequently shut off the load connected to the branch breakers 6 ₆ in the course of setting the delay time.

Also, when the specific branch circuit or load is interrupted and the batch conduction switch operation button 40 is operated (step 31) regardless of the current value detected by the current detector 7, the first-order branch breaker is operated. 6 for example relay device connected to ₁
Conduction operation of 22 is performed. Then, counts the timing signal from the timer 51 from the time the connection operation, the set time, for example after a lapse of 0.5 seconds (step 33), the second order branch breakers 6 ₂
For example, the relay device 23 connected to the terminal is electrically operated. When the batch conduction switch operation button 40 is operated in this way, the conduction control signal is sequentially updated until the final-order branch circuit or the load is conducted, and the relay devices 23, Conduct conduction between 24 and 25 (Step 3
4,35,36), and if the set delay time continues,
Signal from the power line carrier output unit 53 is outputted conduction signal to the terminal device 60, together with the connected load is electrically connected to the branch breakers 6 _5, are connected to the branch breakers 6 ₆ subsequently in the course of setting the delay time load Is conducted. Then, such a conduction operation ends (step 35).

If the batch cutoff switch operation button 39 or the batch conduction switch operation button 40 is not operated (step 31),
Detects the current value flowing through the main breaker 5 (step
37) When it is detected that the peak value of the current value exceeds the set current value set in the memory 50 (step 3).
8), the first order of the branch breakers ₆₁ connected to the example relay device 22 to shut off operation, time counting means from the time of the breaking operation
After counting the time signal from the controller 51, a set time, for example, 2 seconds has elapsed (step 39), the cutoff control is sequentially performed according to the set order until the branch circuit or the load of the last order is cut off until the current value becomes less than the set current value. The signals are updated, and the relay devices 23, 24, and 25 of the branch circuits are sequentially cut off in accordance with the set order (steps 40, 41, and 42). When the set delay time elapses, the signal from the power line carrier output unit 53 is output to the terminal device. 60 interrupting signal is output to the connected load is sequentially cut off to the branch breakers 6 _5, 6 _6. During the interruption of the branch circuit and the load (step 37), if the current value flowing through the main breaker 5 is lower than the set voltage (step 38), if the interruption operation is not being performed (step 43), a return flow is performed and the interruption operation is being performed. When the set delay time has elapsed (step
44), branch breakers 6 _5, and the load connected to 6 ₆ has been interrupted (step 45), power carrier output unit 53 of the control unit 10
Control signal is transmitted by the power line, and the load is automatically returned in sequence automatically after the elapse of the set delay time (step
46). Also, branch breakers 6 _5, 6 and ₆ to the connected load is not blocked (step 45), the return flow.

Further, the return conduction of the interrupted branch circuit is performed by operating the collective conduction switch operation button 40 and further inputting a circuit number by the ten-key switch operation button 35, thereby returning conduction.

As described above, the control signal output from the power line carrier output unit 53 of the control unit 10 is superimposed on the power line connected to the control unit 10 up to the terminal device 60, and the load can be remotely controlled. Wiring can be omitted.

As described above, the current detector 7 detects a current value of a predetermined level flowing through the main breaker 5, a load connected to a particular branch breakers ₆₁ through ₄ and branch breakers 6 _5, 6 ₆ automatically By shutting down, it is possible to prevent a total power failure caused by shutting down the main breaker 5.

Moreover, regardless of the detection of the current detector 7, along with a load connected to a particular branch breakers ₆₁ through ₄ and branch breakers 6 _5, 6 ₆ can block collectively by batch-off switch operation button 39, once a load connected to a particular branch breakers ₆₁ through ₄ and branch breakers 6 _5, 6 _6, which is blocked by the conductive switch operation button 40 can be simultaneously conductive. Therefore, for example, if the load is automatically cut off when going out, the load automatically cut off by the control of the control unit 10 automatically returns when there is no absence and wasteful power is not consumed. Can return to mode.

The control unit 10 is formed by mounting the display unit 34 and control electronic components and the like on the wiring boards 32 and 33, and has a window hole at a portion facing the setting operation unit 33 and the display unit 34.
The control unit 10 is protected by the control unit case 21 because it is housed in the control unit case 21 having the control panel case 21 and is mounted in the distribution board housing 1.
Are easily opposed.

Further, this distribution board can be basically handled in the same manner as a conventional distribution board, so that installation work and operation become easy. Further, the main breaker 5, branch breakers ₆₁ through _18, may be compatible with the same as those of the prior art, it can be made easy.

(Effects of the Invention) According to the distribution board of the present invention, the current detector controls the plurality of branch circuits provided in the branch circuits corresponding to the plurality of specific branch breakers in accordance with the current value flowing through the main breaker. The breaking operation of the shut-off device is performed according to a preset order, or the conducting operation is performed according to a preset order, and the current value flowing through the main breaker is automatically controlled to be less than the breaking current value of the main breaker. A total power failure due to interruption can be prevented, and regardless of the detection of the current detector, all the interrupting devices that are in the conductive state can be collectively shut off by the collective shutoff operation unit, and all of the devices that are in the cutoff state by the collective conduction operation unit For example, if the shut-off devices that were automatically shut off by the control unit are automatically absent when not present, the It is possible to prevent waste of power and to return to the normal state by conducting the electric current collectively when returning home.

[Brief description of the drawings]

FIG. 1 is a front view of a power distribution panel showing an embodiment of the present invention with a door plate opened, FIG. 2 is a front view of the same with the door plate closed, and FIG. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 1, FIG. 5 is a cross-sectional view of the control unit case, FIG. 6 is a front view of the control unit operation panel, FIG.
Fig. 8 is a block diagram of the same control unit, Fig. 8 is a circuit explanatory diagram of the same, Fig. 9 is a current value setting flowchart of the same, Fig. 10 is a reading flowchart of the same, and Fig. 11 is a monitoring flowchart of the same. 5 Main breaker, 6 _{1 to} 6 ₁₈ Branch breaker, 7
... current detector, 8 ... interrupting device, 10 ... control unit, 39 ...
Batch cut-off switch operation button as batch cut-off operation part, 40 ...
... Batch conduction switch operation button as a batch conduction operation unit.

Claims (1)

(57) [Claims] A main breaker; a plurality of branch breakers provided corresponding to the plurality of branch circuits, each of which is connected to the main breaker; and a current detector for detecting a current value flowing through the main breaker; A plurality of shut-off devices provided on the output side of the branch breaker and capable of shutting off a corresponding branch circuit; and shutting down the plurality of shut-off devices in a predetermined order when a current value detected by a current detector exceeds a predetermined level. When the current value detected by the current value detector falls below a predetermined level, the plurality of cutoff devices are turned on in accordance with a preset order, and the current value flowing to the main breaker is less than the cutoff current value of the main breaker. And a control unit that controls all the shut-off devices that are in a conductive state regardless of the detection of the current detector. Distribution board, characterized in that it comprises a collective conducting operation section for conducting collectively all the blocking devices in the cutoff state.