JP2968017B2 - 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, a branch breaker corresponding to an overcurrent of each branch is operated to electrically disconnect the branch from the main breaker, and when the total current of each branch becomes excessive, the main breaker is operated. Operate 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, a load such as a refrigerator requires a few tens of minutes to restart when an instantaneous power supply is stopped, which adversely affects refrigerated food. Some loads such as audio and air conditioners can be operated and controlled by a timer and a telephone control. However, if power is not supplied to these loads, the desired operation cannot be controlled in some cases. Therefore, as a distribution board for avoiding such a problem, for example, as described in JP-A-55-117433, a current value of a main breaker is detected, and a specific branch is detected based on the detected current value. There is known a distribution board for performing control for disconnecting a power supply. This switchboard detects the total current flowing through the distribution line,
This detection signal is transmitted to two peak cut sensors. When the total current exceeds the upper limit level of the first peak cut sensor, the first branch is cut off by a signal from this peak cut sensor. Then, when the total current further increases and exceeds the upper limit level of the second peak cut sensor, the second branch is separated in the same manner. According to this switchboard, it is possible to prevent the main breaker from shutting off and stopping power supply to the load side of all branches as much as possible, which may cause confusion to the user or cause a secondary accident. Can be prevented.

[Problems to be solved by the invention]

However, in the above distribution board, it is necessary to provide a peak cut sensor corresponding to each branch or load to be cut off when a predetermined current flows through the main breaker. For this reason, a peak cut sensor must be appropriately installed according to the number of branches to be separated. Further, it is necessary to set a current value for separating the branch for each peak cut sensor, and setting the peak cut sensor is very troublesome. Furthermore, the above distribution board cannot be recognized by the user that a predetermined branch or load has been disconnected based on the flow of a predetermined current through the main breaker. However, there is a possibility that the user may be confused as to whether the failure is due to a failure or the like. The present invention makes it possible to easily perform a setting for disconnecting a predetermined branch or load, and to easily recognize whether the branch or load is disconnected, thereby improving the convenience of the user. The purpose is to provide.

[Means for Solving the Problems]

The distribution board of the present invention is provided with a main breaker, a detecting device for detecting a current value flowing through the main breaker, a bus connected to the output side of the main breaker, and a bus provided corresponding to each branch. When a detection signal from the plurality of branch breakers and a detection device exceeds a predetermined current value smaller than a cutoff current value of the main breaker, a predetermined branch or load is cut off, thereby setting a current value flowing through the main breaker to a predetermined value. A power control device that keeps the power control value within a value, a main breaker, a detection device, a bus, a box housing a plurality of branch breakers and a power control device, wherein the power control device interrupts a predetermined branch or load. Set current value input section that can arbitrarily set the current value of the main breaker to be set, and set current value display section that displays the current value set by the set current value input section. A use current value display unit for displaying a current value to be displayed, and a cut operation display unit for displaying a state where a predetermined branch or load is interrupted by the power control device. It is arranged so that it can be operated and viewed from the front of the box in a state of being stored in the box. In the present invention, exceeding the predetermined current value includes a case where the current value is equal to or more than the predetermined current value. Further, when the current value of each branch exceeds the breaker itself at a predetermined value (fixed value), the corresponding branch breaker is cut off in the same manner as the conventional one. 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. If a predetermined value is exceeded after one branch is separated, the next branch is separated. That is, a plurality of branches set to be separated in advance are allowed. Furthermore, when the total current value exceeds a predetermined value, disconnection may be performed not in branch units but in load units. On the one hand, a current value smaller than the breaking current value of the main breaker is arbitrarily set on the one hand by the set current value input unit, and on the other hand, a breaking order of the predetermined branch or load is arbitrarily set by the breaking order input unit. be able to. According to the present invention, the current value of the main breaker to cut off a predetermined branch or load can be collectively set by the set current value input unit, so that it is necessary to set the current value for each branch or load. Absent. In addition, a cut operation display unit that displays a state where a predetermined branch or load is cut off by the power control device can easily recognize that the branch or load is disconnected, and furthermore, a set current value display. By comparing the value displayed in the section with the value displayed in the used current value display section, it is possible to predict whether the branch or the load will be disconnected, and to stop the least necessary load at that time. Thereby, it becomes possible to prevent the power control device from operating. Since the input unit and the display unit are arranged so as to be operable and visible from the front of the box while being housed in the box, the convenience of handling is improved.

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, which in this embodiment is an elongated main body 2 having an open upper surface, and one end of each main body 2 is rotatably supported at both ends in the longitudinal direction of the main body 2.
It comprises doors 3a and 3b capable of closing 2a. In addition,
A window 4 is formed in the door 3b, and an opening / closing knob 3c is provided at a boundary with the door 3a. Door 3 again
A magnet 3d is attached to the back of a, 3b and the opening 2a
Is adsorbed. 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 buspers, which is provided substantially at the center of the box 1 from the side surface of the main breaker 5 to the middle of the box 1. The bus 6 and the main breaker 5 are connected by an electric wire 7. As shown in FIG. 1, a plurality of branch breakers 8a to 8b
8n are arranged in a row. The branch breakers 8a to 8n are electrically connected to the bus 6 respectively. The structure of the distribution board described so far is
It is relatively common. Next, 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 current detection device 10 compares the detection signal with a preset current value, and when the detection signal exceeds the preset current value, electrically switches a predetermined specific branch or a specific load. 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 the present embodiment, four branches and two loads can be separated, and the branch breakers 8a to 8d correspond to the four branches. As the two loads, for example, the air conditioner 12a , 12b. Air conditioner 12
a and 12b are connected to branch breakers 8e and 8f, respectively. In the present embodiment, it is assumed that the four branches are separated from each other. The off control units 13a to 13d are provided on the right side 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 this embodiment, a power line superimposed signal is used to separate the two air conditioners 12a and 12b. For this purpose, an on / off control unit 15a which is a reception control device corresponding to each of the air conditioners 12a and 12b is used. , 15b. As described above, as the reception control devices 15a and 15b, the power supply to the air conditioners 12a and 12b is turned on and off every time the power line superimposition signal of the own address is received, and the HA already known in the telecontrol system is used.
Terminals with terminals can be used as they are. 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. This power control device 11 is structurally structured such that wiring boards 20 and 21 on which electronic components are mounted are laminated in two layers, housed in a metal case 22, and arranged on the right end of the box 1. Has been established. Further, the wiring board 20 is provided with a panel P on which an operation unit 23 and a display unit 24 described later are disposed, and the operation unit 23 and the display unit 24 can be operated or visually recognized from the outside in the case 22. like,
The panel 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 23 corresponds to a used current changeover switch 230, a numeric key switch 231, the branch breakers 8a to 8d, and the air conditioners 12a and 12b, which are switched according to a power contract capacity with a power company. A batch ON switch 232 for turning on the ON / OFF control units 13a to 13f collectively, a batch OFF switch 233 for batch OFF, a cutoff order / cutoff inhibition / return time setting switch 234, a current value setting switch 235, and a return switch 236. It is configured. The functions of these switches 231 to 236 will be described later. Further, the display unit 24 includes a set current value display unit 241 formed of a digital display, a rank display unit 242 also formed of a digital display, and a used current value display unit 243 for displaying a level of a used current in which a plurality of light emitting LEDs are arranged in a line. And a cut operation display section 244 for lighting a blocked circuit number in which a plurality of light emitting LEDs are arranged in a line. These display units 241
The functions of .about.244 will be clarified in the following description.
Note that the display unit 24 can be formed using a display device capable of expressing a level or a value such as a light emitting diode and a liquid crystal. FIG. 7 functionally shows the configuration of the power control device 11. As shown in FIG. Reference numeral 30 denotes an arithmetic processing unit for inputting information from the operation unit 23, outputting a display command to the display unit 24, and transmitting and receiving signals to and from the memory 31. Reference numeral 32 denotes an A / D converter for A / D converting a detection signal from the current detection device 10, and inputs the digital signal to the arithmetic processing device 30. Reference numeral 33 denotes a time measuring means, and reference numeral 34 denotes 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 a relay signal output unit that outputs a signal for controlling the on / off control units 13a to 13d. 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 on / off control units 13a to 13d, and the power control device 11 are individually mounted on mounting bases (not shown), and are vertically arranged in FIG. Two rail-shaped bases 44, 45
Mounted on These bases 44, 45 have, for example, locking holes 42, and are locked on locking pieces 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 1 by means such as screws 46. Removably attached. 47 is the main breaker 5
And a front panel having window holes 48 and 49 for exposing operation parts of the branch breakers 8a to 8n. 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, each mounting base is 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. Further, the power transformer 14 is attached to the base 44. The bases 44, 45 on which the required parts are mounted in this manner are mounted on the box 1, and electrical wiring is performed, whereby the assembly is completed. In the above assembling, the required parts are mounted on the mounting bases and then mounted on the bases 44 and 45, or the base 4
4, 45 may be attached, and it is not limited to the above order. Next, referring to FIGS. 9 to 11, a description will be given of various display procedures required before use. The display control is performed by the power control device 11. As shown in FIG. 9, first, when power is supplied by turning on the power, the arithmetic processing unit 30
Starts the monitoring process (step 702) from the reset state (step 701). In the monitoring process, data detected by the power 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 23 are pressed, the respective setting modes are set. In the case of the current value setting switch 235, when the current value is set by the numeric key switch 231 and the setting switch 234 is pressed (step 703), the set current value is read (step 704), and it is determined whether the current value is appropriate. (Step 705) 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 section 241 in the monitoring mode. The data detected by the detection device is displayed on the used current value display unit 243. (Step 707). The operation unit 23
When the switch 234 or the current value setting switch 235 is not pressed, the latest update data is displayed on the set current value display section 241 and the data detected by the current detection device is displayed. It is displayed on the unit 243. In addition, the cut operation display unit 244 includes a plurality of (for example,
6) display lamps. These lamps are designed to light up when the corresponding branch or load is interrupted by the power control. It should be noted that the method of displaying the interruption may be performed by blinking a lamp. Next, referring to FIG. 10, a description will be given of a procedure for setting a current value, a breaking order, a blocking prohibition, and a return time. These processes are performed by the arithmetic processing unit 30. First, set the current value,
Each setting mode of the cutoff prohibition and the return time may be selected by a separate switch, but in the present embodiment, when the current value setting switch 235 is pressed, the arithmetic processing unit 3
0 is the current value setting mode, and when the cutoff order / cutoff inhibition / return time setting switch 234 is pressed, the arithmetic processing unit 30
Enters the cutoff order / cutoff inhibition / return time setting mode (step 801). When the return switch 236 is pressed (step 804), the newly set data is stored in the arithmetic processing unit 3
The value is updated in the memory 31 by 0 (step 808), and the arithmetic processing unit 30 enters a monitoring mode in which the above-described monitoring processing is performed (step 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 cut off by the main breaker, for example, 100 amps 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). If the input data is within the allowable range, 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. The monitoring mode is performed (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 display section 240 displays the circuit number 01 of the on / off control section 13a. . 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 0 from the highest priority
If you enter 1, 02, 03, 04, 06 or, for example, 00,
Even if the current value of the current detection device 10 exceeds the set value, the cutoff control is set so as not to be performed. 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. Whenever one order setting is completed, press the cut-off order / cut-off prohibition / return time setting switch 234. You can move on to the next setting. Now, since the on / off control unit has six circuits,
When the switch 234 for setting the cutoff order / disabling prohibition / return time is pressed seven times, the circuit number display section 240 displays the on / off control section 1 again.
The circuit number 01 of 3a is displayed. At this time, it is the return time setting mode. Here, if 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 09 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 cutoff order / cutoff inhibition / 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). A determination is made as to whether or not it is appropriate (step 814), and if this is appropriate, it is stored in the memory 31 (step 815), and the mode shifts to the monitoring mode (step 816). When setting the above-mentioned shutdown order, shutdown prohibition, and reset time,
Data such as the breaking order, breaking prohibition, and reset time entered by the numeric key switch 231 are displayed in the ranking display for each circuit number.
Displayed at 242, 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, a description will be given of the processing of the arithmetic processing unit 30 in the load use, that is, the monitoring mode. In the monitoring mode state, the current flowing through the main breaker 5 is always detected by the current detector 10 and is input to the power controller 11 (step 901). In the power control device 11, the A / D converter 32 converts the detection signal into a digital signal and inputs the digital signal to the arithmetic processing device 30. When the batch ON switch 232 and the batch OFF switch 233 are not pressed in the processing unit 30 (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 larger than the set current value (step 904) and continues for a predetermined time, for example, 2 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 this 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 to interrupt the next branch or load (steps 900 to 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 block prohibition data 00. In rare cases, after all of the predetermined branch and load 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 distribution board. As described above, the detection signal falls below the set current value (step 904), and all the set branches and loads are cut off (step 91).
1) and continue for a predetermined time, for example, one minute (step 91)
2), the load, that is, the air conditioner 12a is automatically returned (step 913). Further, when the detection signal falls below the set current value and the set return time, for example, one minute has elapsed (step 913), the air conditioner 12b is automatically reset (step 91).
Four). In the present embodiment, the logic (step 912) is provided and the automatic return is performed by the on / off control units 15a and 15b.
The ON / OFF control units 13a to 13d are set so as not to be automatically reset. Logic (step 912)
Is to determine whether the return interval is set to 00. Specifically, the air conditioners 12a and 12b are set to 01, and other air conditioners are set to 00 except for the air conditioners 12a and 12b. Of course, it is possible to automatically return the 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 that it is preferable from the viewpoint of safety not to automatically restore the branch. In the present embodiment, whether or not to automatically return is processed on data. However, the on / off control unit that wants to perform automatic recovery 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 cut-off branch or load is counted for a preset time, for example, 5 seconds (921) when the collective on switch 232 (collective off switch 233) is operated (Step 902). When the time is up, start counting the set time again (step
922) Then, the memory 31 data is updated to the data related to the branch or the load to output the on (off) signal (step 923), and it is confirmed that the update data related to the branch or the load to be turned on (off) exists. Later (step 92
4), an on (off) signal for turning on (off) the on / off control unit before updating is output (step 925), and this process is repeated, and all the specified branches and loads are turned on (off). After that (step 924), there is no longer anything to turn on (off), so the process returns to the monitoring mode. This logic (step 924) is to determine whether there is an on / off control unit to be turned on (off) because the on / off prohibition data 00 is ignored. In the present embodiment, the set current value display section and the circuit number display section are provided so as to overlap with each other. However, since the current value setting mode and the other setting mode requiring a circuit number are separated, the display may be duplicated. Does not occur. Further, since each setting is performed using the numeric keypad, any value can be easily set. The present invention is not limited to the above embodiment, but allows various modifications.

【The invention's effect】

According to the present invention, it is not necessary to set the current value for each branch or load, since the current value of the main breaker to cut off a predetermined branch or load can be collectively set by the set current value input unit. . In addition, the cut operation display unit that displays a state in which a predetermined branch or load is cut off by the power control device can easily recognize that the branch or load is disconnected, and the electric device is stopped. It can be seen that the power control device works due to excessive use of electric power, not the equipment failure, and the branch is interrupted. Further, by comparing the value displayed on the set current value display section with the value displayed on the used current value display section, it is possible to predict whether the branch or the load will be disconnected, and the power control device operates to branch the load. By turning off the power of any unnecessary device before the power is turned off, the power can be turned off regardless of the set branch order. The input section and the display section are stored in the box so as to be operable and visible from the front of the box, so that necessary information regarding shutoff can be obtained and the handling convenience is improved.

[Brief description of the drawings]

FIG. 1 is a partially omitted front view showing an open state of an embodiment of a distribution board of the present invention.

FIG. 2 is a front view of the same.

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

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

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

FIG. 6 is a front view of the panel.

FIG. 7 is a block diagram showing a functional configuration of the power control unit.

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

FIG. 9 is a block diagram showing an operation processing procedure.

FIG. 10 is a block diagram showing an operation processing procedure.

FIG. 11 is a block diagram showing an operation processing procedure.

[Explanation of symbols]

 1 ... Box body, 5 ... Main breaker 8a-8n ... Branch breaker, 10 ... Detection device 11 ... Power control device, 241 ... Set current value display section 243 ... Used current value display section, 244 ... … Cut operation display

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-55-117433 (JP, A) JP-A-62-114423 (JP, A) JP-A-62-100121 (JP, A) JP-A 57-117 20117 (JP, A) JP-A-59-172911 (JP, A) JP-A-49-59028 (JP, U) JP-A 1-20038 (JP, U) JP-A 53-128521 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) H02J 3/00-5/00 H02B 1/40

Claims (1)

(57) [Claims] 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 plurality of buses provided corresponding to each branch and connected to the bus. A branch breaker; when a detection signal from the detecting device exceeds a predetermined current value smaller than a cutoff current value of the main breaker, a predetermined branch or load is cut off, so that a current value flowing to the main breaker falls within a predetermined value. A power control device to be suppressed; a main body including a main breaker, a detection device, a bus, a plurality of branch breakers, and a power control device; and the main power control device to cut off a predetermined branch or load. A set current value input section that can set the current value of the breaker arbitrarily, a set current value display section that displays the current value set by the set current value input section, A use current value display section for displaying a flowing current value, and a cut operation display section for displaying a state in which a predetermined branch or load is interrupted by the power control device, wherein each input section and each display section are A distribution board characterized in that it is arranged so as to be operable and visible from the front of the box while being housed in the box.