JP3131902B2 - Switchboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION

The present invention relates to a distribution board provided with a plurality of branch breakers and a main breaker common to each branch breaker.

[Prior art]

Conventionally, as a distribution board, for the overcurrent of each branch, the corresponding branch breaker is activated to electrically disconnect this branch from the main breaker, and the current for relaxing each branch is excessive It is known that sometimes a master breaker is activated to electrically disconnect all branches from the power supply. However, shutting off all branches to which the load is connected, as in the above distribution board,
It was very inconvenient. For example, loads such as refrigerators require a few tens of minutes to restart when power is momentarily stopped, which adversely affects refrigerated food.
In addition, timers are used for loads such as audio and air conditioners,
Some of the operation can be controlled by telephone control, but the operation cannot be controlled as desired unless power is supplied to these loads. Recently, in order to solve such a problem, a distribution board has been developed which can prevent a main breaker from shutting off and stopping power supply to a load side of all branches as much as possible. The distribution board includes a detection device for detecting a current value flowing through the main breaker, and a predetermined branch or load when the detected current value exceeds an arbitrary set current value smaller than a breaking current value of the main breaker. And a power control device for performing cutoff control. The power control device includes a set current value display unit for facilitating the setting of the set current value, and a detection unit for facilitating the setting of the set current value and predicting that the power control will be performed. A current value display unit is provided on one side. Then, by the control performed by the power control device, the value of the current flowing through the main breaker can be suppressed within the set current value.

[Problems to be solved by the invention]

By the way, in designing the above distribution board, in order to keep the development and manufacturing costs as low as possible, a box (housing) with the same or the same basic configuration as a normal distribution board without a power control device is used. Is often done. In this case, a space for arranging the power control device is provided by reducing the number of branch breakers to be mounted. However, since the space for arranging the power control device is provided later, it is not easily limited. Then, depending on the position of the power control device in the box, the display section of the current value or the like is located at the upper and lower corners of the box and is hidden by the edges of the box or the electric wires along the edges, and from afar. It may be difficult to see. In particular, the detection current value display section has a use to be visually recognized in order to predict that power control will be performed. Therefore, it is necessary that the detection current value display section can be visually recognized even from a distant place relatively far from the distribution board. An object of the present invention is to provide a distribution board that can solve the above-described problems.

[Means for Solving the Problems]

The distribution board of the present invention includes a main breaker, a detection device for detecting a current value flowing through the main breaker, a bus connected to an output side of the main breaker, and a bus provided corresponding to each branch. A plurality of connected branch breakers,
A set current value input unit that can arbitrarily set a current value smaller than the breaking current value of the main breaker, a set current value display unit that displays this set current value, and a detected current value that displays the detected current value detected by the detection device A power control device having a display unit, wherein when a detected current value exceeds a set current value, a predetermined branch or load is cut off to suppress a current value flowing through the main breaker to within the set current value; In a power distribution panel including a breaker, a detection device, a bus bar, a plurality of branch breakers, and a box housing the power control device, the detected current value display section of the power control device is disposed substantially at the center in the vertical direction of the power control device. A plurality of light-emitting elements are arranged in the horizontal direction so as to light up sequentially from one end, and the number of light-emitting elements that light up with an increase in the detected current value increases. Constant current value display unit is characterized by a structure different from that of the detected current value display section not intended to aligning the light emitting element. In the present invention, the meaning of exceeding the predetermined current value includes the case where the current value is higher than the predetermined current value. According to the present invention, when the current value of each branch exceeds a predetermined value (fixed value) predetermined for the breaker itself, the corresponding branch breaker is cut off as in the conventional case.
When the total current value of each branch exceeds a predetermined value, a preset branch is electrically opened. Therefore, the total current value can be suppressed within a predetermined value. Further, since it is possible to know which branch is to be disconnected, by selecting a load connected to the branch, inconvenience to the user can be minimized. If a predetermined value is exceeded after one branch is separated, the next branch is separated. In this case, there are a plurality of branches that are set to be separated in advance. Further, when the total current value exceeds a predetermined value, disconnection may be performed not in branch units but in load units. When the power control device is set to an arbitrary current value by the set current value input unit, the power control device displays the set current value on the set current value display unit. At the same time, when the detection signal is sent from the detection device, the detected current value is displayed on the set current value display unit and the detected current value display unit provided side by side. In addition, in the distribution board of the present invention, in particular, the detected current value display section of the power control device is provided substantially at the center in the vertical direction of the power control device, and a plurality of light-emitting elements are turned on in order from one end so as to turn on sequentially. The number of light-emitting elements that light up with an increase in the detected current value increases.The set current value display section is not an arrangement of the light-emitting elements but a detected current value display section. Since the configuration is different from that described above, the following operation is provided. That is, it is difficult to mistake the set current value display section for the detected current value display section. In addition, the detected current value display section is not required to be viewed close to the set current value display section as compared with the set current value display section. However, according to the above configuration, the power control device can be disposed at any position in the distribution board. The detected current value display part is no longer located at the upper and lower corners of the box of the distribution board, so it is not hidden by the edge of the box or the electric wire arranged along this edge, and It becomes easy to see even from.
Therefore, the degree of freedom in the arrangement position of the power control device in the distribution board is increased, and it becomes easy to use a common power control device in a plurality of different distribution boards.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. Reference numeral 1 denotes a box. In this embodiment, an elongated main body 2 having an open upper surface, and one end of each main body 2 rotatably supported at both ends in the longitudinal direction of the main body 2 to close the opening 2a It consists of possible doors 3a and 3b. A window 4 is formed in the door 3b, and an opening / closing knob 3c is provided at a boundary with the door 3a. Further doors 3a, 3b
The magnet 3d is accommodated on the back surface of the device and is attracted to the opening 2a. Reference numeral 5 denotes a main breaker, which is disposed at the right end of the box 1 as shown in FIG. Reference numeral 6 denotes a bus bar composed of a bus bar.
Is provided substantially at the center of the box 1. The bus 6 and the main breaker 5 are connected to an electric wire 7
Connected at As shown in FIG. 1, a plurality of branch breakers 8a to 8n are arranged in a row in a row above and below the bus 6, respectively. And these branch breakers
8a to 8n are electrically connected to the bus 6, respectively. The structure of the distribution board described so far is relatively common. In addition, reference numeral 10 denotes a current detecting device for detecting a value of a current flowing through the main breaker 5. In this embodiment, a zero-phase current transformer is used. The detection signal of the current detection device 10 is input to the power control device 11. The power control device 10 compares the detection signal with a preset current value, and when the detection signal exceeds the preset current value, electrically switches a specific branch or a specific load preset. Is to be cut off. Note that a specific branch or load may be electrically disconnected when the detection signal is equal to or greater than the set current value. That is, in this embodiment,
The four branches and the two loads can be separated, and the branch breakers 8a to 8d correspond to the four branches.
The two loads are, for example, air conditioners 12a and 12b. The air conditioners 12a and 12b are each a branch breaker.
Connected to 8e, 8f. Assuming that the four branches are separated, in the present embodiment, the branch breakers 8a to 8d are respectively provided.
In response to the above, on / off control units 13a to 13d including four remote control relays are provided to the right of the branch breaker groups 8a to 8n. Reference numeral 14 denotes a power transformer for operating the on / off control units 13a to 13d. In addition, the above two air conditioners 12
In this embodiment, a power line superimposed signal is used to separate a and 12b. For this purpose, on / off control units 15a and 15b each including a reception control device are provided corresponding to each of the air conditioners 12a and 12b. . As described above, as the reception control devices 15a and 15b, each time the power line superimposition signal of the self-address is received, the power supply to the air conditioners 12a and 12b is turned on and off. It can be used. The terminal may be capable of arbitrarily controlling power supply to a load from 0 to 100%. Next, the configuration of the power control device 11 will be described in detail with reference to FIG. The power control device 11 is structurally structured such that wiring boards 20 and 25 on which electronic components are mounted are laminated in two layers, and housed in a metal case 22, and arranged on the right end of the box 1. Has been established. The wiring board 20 is provided with a panel P on which an operation unit and a display unit described later are provided. The case 22 is provided with a panel so that the operation unit and the display unit can be operated or confirmed from outside. P
Is disposed so as to face the window 4 of the door 3a of the box 1. As shown in FIG. 6, the operation unit includes a use current changeover switch 230, a ten-key switch 231, and a branch breaker 8a that are switched according to a power contract capacity with a power company.
-On switch 23 for turning on / off control units 13a to 13f corresponding to the air conditioners 12a and 12b together with the air conditioners 12a and 12b.
2.Batch-off switch 233 to turn off all at once, switch-off / stop-off / return-time setting switch 234, current setting switch 2
35, a return switch 236. The functions of these switches 231 to 236 will be described later. The display unit is a set current value display unit 1 composed of a digital display, a rank display unit 2 also composed of a digital display, a detected current value display unit 3 that displays a level of a used current in which a plurality of light emitting LEDs are arranged in a line, Similarly, it has a cut operation display section 4 for lighting a blocked circuit number in which a plurality of light emitting LEDs are arranged in a line. Here, the detection current value display unit 3 is configured by arranging a plurality of light emitting elements in a horizontal direction so as to sequentially turn on one end from one end at a substantially central portion in the vertical direction of the power control device 11, The number of light-emitting elements that are turned on increases as the current value increases. The functions of these display units 1 to 244 will be clarified in the following description. Note that the display portion can be formed using a display device such as a light-emitting diode or a liquid crystal that can express a level or a value. FIG. 7 functionally shows the configuration of the power control device 11. Numeral 30 denotes an arithmetic processing unit for inputting information from the operation unit, outputting a display command to the display unit, and transmitting and receiving signals to and from the memory 31. 32 outputs the detection signal from the current detection device 10 to A /
It is an A / D converter that performs D conversion, and inputs the digital signal to the arithmetic processing device 30. 33 is the timing means, 34
Is a backup power supply for the memory. D is a power line superimposed signal output unit that outputs a signal for controlling the on / off control units 13e to 13f to a power supply line, and R is an on / off control unit 13a to 1
This is a relay signal output unit that outputs a signal for controlling 3d.
Each of the above parts may be integrally formed by a CPU or the like. The main breaker 5, the branch breakers 8a to 8n,
The off-control units 13a to 13d group and the power control device 11 are individually attached to a receiving stand (not shown), and the bases 44 on two rails vertically arranged in FIG. Installed on 45. The bases 44 and 45 have, for example, a locking hole 42 and are locked on a locking plate 43 provided on the bottom surface of the main body 2, and then are fixed to the bottom surface of the main body 2 of the box body 1 by means such as screws 46. Removably attached. 47 is a window hole for exposing the operation parts of the main breaker 5 and the branch breakers 8a to 8n.
48, a front panel having 48. Next, the operation of the present embodiment will be described with reference to FIGS. First, for assembling, the box 1 is mounted such that it is exposed or embedded in a wall surface (not shown) or the like. On the other hand, the respective mounting bases are mounted on the bases 44 and 45, and the main breaker 5, the branch breakers 8a to 8n, the on / off control units 13a to 13d, and the power control device 11 are mounted on these mounting bases. Further, the power transformer 14 is attached to the base 44. The bases 44, 45 on which the required parts have been attached in this manner are attached to the box 1,
When the electrical wiring is performed, the assembly is completed. In addition, in the above assembly, after mounting the required parts on each mounting base,
The bases 44 and 45 may be attached to the boxes 44 and 45, or the bases 44 and 45 may be attached to the box 1 in advance. The order is not limited to the above order. Next, referring to FIG. 9 to FIG. 11, procedures of various necessary settings prior to use will be described. Display control for setting work
This is performed by the power control device 11 described above. As shown in FIG.
First, when power is supplied by turning on the power, the arithmetic processing unit 30 starts monitoring processing (step 702) from the reset state (step 701). In the monitoring process, data detected by the current detection device is read into the arithmetic processing unit 30 through the A / D conversion unit 32. Next, when the order / return time setting switch 234 and the current value setting switch 235 of the operation unit are pressed, the respective setting modes are set. When the current setting switch 235 is pressed, the numeric key switch 231
When the current value is set by pressing the current value setting switch 235 again (step 703), the set current value is read (step 704), and it is determined whether the current value is appropriate (step 7).
05) If the data is appropriate, the data in the memory 31 is updated (step 706), and the display data is also updated so that the updated data is always displayed on the set current value display unit 1 in the monitoring mode. Is displayed on the detected current value display unit 3. (Step 707). When the order / return time setting switch 234 and the current value setting switch 235 of the operation unit are not pressed,
The latest updated data is displayed on the set current value display unit 1 and the data detected by the current detection device is displayed on the detected current value display unit 3. Next, referring to FIG.
The procedure for setting the return time will be described. These processes are performed by the arithmetic processing unit 30. First, each of the setting modes of the current value setting, the cutoff order, the cutoff inhibition, and the return time may be selected by a separate switch, but in this embodiment, when the current value setting switch 235 is pressed, the arithmetic processing unit 30 The current value setting mode is entered, and the cutoff order / cutoff inhibition / return time setting switch 234 is suppressed, so that the arithmetic processing unit 30 enters the cutoff order / interruption prohibition / return time setting mode (step 80).
1). The return switch 236 is pressed (step 804).
Then, the newly set data is updated in the memory 31 by the arithmetic processing unit 30 (step 808), and the arithmetic processing unit 30 enters the monitoring mode in which the above-described monitoring processing is performed (step 808).
809). If the return switch 236 is not pressed (step 8
04), the state is changed (step 810). First, in the current value setting mode, when the set current value is input by the ten-key switch 231 and the return switch 236 is pressed (step 804), the set current value is evaluated (step 805). If the input data exceeds the allowable value, such as when the data exceeds the current value interrupted by the master breaker, for example, 100 amperes or is set to 0, it is determined that an error has occurred (step 806). Then, an error display such as blinking the corresponding display section is performed (step 807). In this case, when the current value setting switch 235 is pressed again, the setting can be changed (step 810). By the way, when the input data is within the allowable value, the newly set data is updated in the memory 31 by the arithmetic processing unit 30 (step 808), and the arithmetic processing unit 30 performs the above-described monitoring processing. Enter monitoring mode (step
809). Next, the cut-off order / cut-off prohibition / return time setting switch 23
When 4 is pressed (step 801), the mode becomes the setting mode (snap 810) of the cutoff order, the cutoff prohibition, and the return time. First, the circuit number 01 of the on / off control unit 13a is displayed on the circuit number display unit 0. . Here, the circuit numbers 01 in the ON / OFF control units 13a to 13d, 15a, and 15b are ranked using the numeric keypad 231 and the cutoff order / cutoff inhibition / return time setting switch 234 is pressed. The specific input value of the cutoff order is 01, 02, 03, 04, 06 from the higher priority order.
Is input, the interruption control is set not to be performed even if the current value of the current detection device 10 exceeds the set value. That is, in the present embodiment, 00 is the cut-off prohibition setting unit. The next circuit number is displayed by pressing the cut-off order / cut-off prohibition / return time setting switch 234 each time. You can move on to the next setting. Now, since the on / off control unit has six circuits,
When the cut-off order / cut-off prohibition / return time setting switch 234 is pressed seven times, the on / off control unit 13 is again displayed on the circuit number display unit 0.
The circuit number 01 of a is displayed. At this time, it is the return time setting mode. Here, when the return time, for example, 09 is pressed by the ten keys 231, the return time is input to the arithmetic processing unit 30 as 9 minutes. Shutdown order / Shutdown prohibition / Return time setting switch 23
Each time 4 is pressed, the next circuit number is displayed, so that the switch to the next setting can be made by pressing the cut-off order / cut-off prohibition / return time setting switch 234 each time one return time setting is completed. In this case, if 00 is input, it is set so that the return control is not performed. Then, after a series of settings (interruption order / interruption prohibition / return time) is completed, the reset switch 236 is pressed (step 812) to read the interruption order / interruption prohibition / return time (step 813).
It is determined whether the data is appropriate (step 814). If the data is appropriate, the data is stored in the memory 31 (step 815).
Move to monitoring mode (Snap 816). At the time of the above-mentioned shut-down order, shut-off prohibition, and reset time setting,
The data such as the order of interruption, the inhibition of interruption, and the return time entered by the ten-key switch 231 are displayed on the order display unit 2 for each circuit number, so that the operator can set while confirming. If the input data is incorrect in the setting of the cutoff order, the cutoff prohibition, and the return time (step 814), it is determined that an error has occurred, and an error display such as blinking the corresponding display unit is performed (step 814). Step 817). With reference to FIG. 11, the processing of the arithmetic processing unit 30 in the load use, that is, in the monitoring mode will be described. In the monitoring mode, the current flowing through the main breaker 5 is always detected by the current detecting device 10 and is input to the power control device 11 (step 901). In the power control device 11, the A / D conversion device 32 converts the detection signal into a digital signal and inputs the digital signal to the arithmetic processing device 30. In the arithmetic processing unit 30, when the batch ON switch 232 and the batch OFF switch 233 are not pressed (step 902).
Then, the digital signal is compared with the set current value (snap 903). As a result of the comparison, when the detection signal is equal to or more than the set current value (step 904) and continues for a predetermined time, for example, two seconds (step 905), the data on the branch or load to be cut off is updated (step 90).
6) After confirming that there is update data on the branch or load to be cut off and updating the data (step 907), a cutoff signal is output to the branch or load to be cut off (on / off control unit in the embodiment) ( Step 908). further,
If the detection signal is equal to or greater than the set current value (or if the detected signal value is equal to or greater than the set current value), the same processing is performed, and the next branch or load is interrupted ((step
900) to (step 908)). After all of the branches to be interrupted or the branches and loads whose loads have been specified have been interrupted (step 909), there is no longer anything to be interrupted, so the process returns to the monitoring mode. This logic (step 907) is for judging whether there is any data other than the cut-off prohibition data 00. In rare cases, after all of the specified branches and loads are cut off, when the detection signal exceeds the set current value, the branch breaker is cut off as in the case of the conventional ionization. As described above, when the detection signal is lower than the set current value (step 904), all the specified branches and loads are shut off (step 911), and the detection signal is set to a predetermined time, for example, 1
Minutes (step 912), the load, air conditioner 1
2a is automatically returned (step 913). Further, when the detection signal falls below the set current value and the set recovery time, for example, one minute has elapsed (step 913), the air conditioner 12b is automatically reset (step 914). In this embodiment, logic (step 912) is provided,
Only the on / off control units 15a and 15b are set to automatically return, and the on / off control units 13a to 13d are set not to automatically return. The logic (step 912) is
Specifically, it is determined whether the return time is set to 00, and the air conditioners 12a and 12b are set to 01 and the air conditioner is set to 01.
Other than 12a and 12b, it is set to 00, but of course it is also possible to automatically return to a branch.
However, considering that it is not clear which load is connected to the branch or that a heat-generating device may be connected, it is considered safer not to automatically restore the branch. In the present embodiment, whether or not to automatically return is processed on the data. However, the on / off control unit that does not want to automatically return may be set to a state in which an automatic return signal cannot be output in a circuit in advance. Next, batch ON / OFF control will be described. In the flow (step 909), the interrupted branch or load counts a preset time, for example, 5 seconds (step 921) when the collective on switch 232 (collective off switch 233) is operated (step 902). ), When the time is up, the set time starts to be counted again (step 922), and then the data on the memory 31 is updated to the data on the branch or load to output the on (off) signal (step 923), and the on ( After confirming that there is update data on a branch or load to be turned off (step 924), an on (off) signal for turning on (off) the on / off control unit before the update is output (step 924).
925), this process is repeated, and after all of the specified branches and loads are turned on (off) (step 924), the process returns to the monitoring mode because there is no more to turn on (off). This logic (step 924) corresponds to the on-off prohibition data 0
0 is ignored and is simply a judgment as to whether there is an on / off control unit to be turned on (off). In this embodiment, the set current value display unit 241 and the circuit number display unit 2
Although 40 is provided in an overlapping manner, the current value setting mode and the setting mode requiring other circuit numbers are separated, so that there is no problem of double display. Each setting is
All values can be easily set because it is performed using the numeric keypad. The present invention is not limited to the above embodiment,
Various deformations are allowed.

【The invention's effect】

In the power distribution board of the present invention, the detected current value display unit of the power control device is provided at a substantially central portion in the vertical direction of the power control device, and a plurality of light emitting elements are arranged in a lateral direction so as to light up sequentially from one end. The number of light-emitting elements that light up as the detected current value increases increases, and the set current value display section does not align the light-emitting elements and is different from the detected current value display section. Therefore, the following effects are obtained. That is, it is difficult to mistake the set current value display section for the detected current value display section. In addition, the detected current value display section is not required to be viewed close to the set current value display section as compared with the set current value display section. However, according to the above configuration, the power control device can be disposed at any position in the distribution board. The detected current value display part is no longer located at the upper and lower corners of the box of the distribution board, so it is not hidden by the edge of the box or the electric wire arranged along this edge, and It becomes easy to see even from. Therefore, the degree of freedom in the arrangement position of the power control device in the distribution board is increased, and it becomes easy to use a common power control device in a plurality of different distribution boards.

[Brief description of the drawings]

FIG. 1 is a front view showing an open state of an embodiment of a distribution board according to the present invention, with a part thereof being omitted.

FIG. 2 is a front view of the embodiment.

FIG. 3 is a partially omitted cross-sectional view along the line AA of FIG. 2;

FIG. 4 is a partially omitted cross-sectional view along the line BB of FIG. 2;

FIG. 5 is a partially omitted cross-sectional view showing the power control unit of the embodiment.

FIG. 6 is a front view of the power control device of the embodiment.

FIG. 7 is a block diagram illustrating a functional configuration of a power control unit according to the embodiment;

FIG. 8 is a system block diagram showing a simplified use state of the embodiment.

FIG. 9 is a flowchart showing an operation processing procedure of the embodiment.

FIG. 10 is another flowchart.

FIG. 11 is still another flowchart.

[Explanation of symbols]

1 ... box body, 5 ... main breaker, 8a-8n ... branch breaker, 10 ... detection device, 11 ... power control device, 243 ... detected current value display section.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-240852 (JP, A) JP-A-56-115134 (JP, A) JP-A-62-100121 (JP, A) JP-A Sho 52- 97246 (JP, A) JP-A-62-290317 (JP, A) JP-A-62-230317 (JP, A) JP-A-2004-20038 (JP, U) JP-A-59-86618 (JP, U)

Claims (1)

(57) [Claims] 1. A main breaker, a detecting device for detecting a current value flowing through the main breaker, a bus connected to an output side of the main breaker, and a bus provided corresponding to each branch and connected to the bus. A plurality of branch breakers, a set current value input section capable of arbitrarily setting a current value smaller than a breaking current value of the main breaker, a set current value display section for displaying the set current value, and a detection current detected by the detection device It has a detected current value display unit that displays the value, and when the detected current value exceeds the set current value, cuts off a predetermined branch or load, so that the current value flowing to the main breaker falls within the set current value. In a distribution board equipped with a power control device to be suppressed and a main breaker, a detection device, a bus bar, a plurality of branch breakers, and a box housing the power control device, the detected current value of the power control device The indicating unit is provided at a substantially central portion in the vertical direction of the power control device, and is configured by arranging a plurality of light emitting elements in a lateral direction so as to sequentially turn on from one end, and turns on as the detected current value increases. A distribution board characterized in that the number of light emitting elements is increased, and the set current value display section is different from the detected current value display section in that the light emitting elements are not arranged.