JPH03245730A - Distribution board - Google Patents

Abstract

PURPOSE:To enhance safety of an electric apparatus by controlling to break a breaker by a power controller when a detection signal reaches a predetermined condition for a set current value. CONSTITUTION:A current flowing to a master breaker 5 is detected by a current detector 10, and input to a power controller 11. The controller 11 converts a detection signal to a digital signal in an A/D converter 32, and inputs it to a calculating processor 30. The processor 30 compares the digital signal with a set current value. As a result of comparison, when the signal is the set value or larger and continued for predetermined time, data regarding a branch or a load to be broken is updated and a break signal is output. When the branches A-D specified in advance are broken, the load 12a is broken this time. After the branches A-D and the loads 12a, 12b are all broken, the breaker 5 is broken.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a distribution panel device including a main breaker and a plurality of branch breakers corresponding to a plurality of branches.

(Prior Art) Conventionally, a distribution panel device including a main breaker and a plurality of branch breakers connected to the main breaker and each corresponding to a branch is already well known.

In this type of distribution board device, in response to an overcurrent in each branch, a corresponding branch breaker operates to interrupt the branch in terms of an electrical circuit. Furthermore, when the total current value of each branch becomes excessive, the master breaker operates to cut off all branches in terms of electrical circuits.

(Problem to be Solved by the Invention) However, as described above, when the main breaker operates to cut off all branches, that is, all loads, it is difficult for the user to suddenly stop all electrical appliances. This was extremely inconvenient in some cases. for example,
If a lighting load is suddenly turned off at night, it can cause anxiety and confusion. Further, depending on the electrical equipment, if the electrical equipment is suddenly stopped during use, the load may be irreparably damaged or the electrical equipment itself may malfunction.

The present invention was made to solve these problems, and it improves user convenience by preventing as much as possible the main breaker from tripping and suddenly stopping the power supply to the load side of all branches. In addition to improving the safety of electrical equipment,
Further, it is an object of the present invention to provide a distribution board device that can perform extremely fine power control.

a current detection device that detects the current flowing through the circuit; a cutoff device that is installed on the output side of the selected breaker and is capable of cutting off the power supply to the corresponding branch; a detection signal of the current detection device and a preset cutoff current of the main breaker; A power control device is installed that cuts off the selected branch and load based on comparison with a current value smaller than the current value. A terminal device is provided for controlling power supply to the terminal device, and the power control device controls the cutoff device to cut off when the detection signal reaches a predetermined condition for the set current value. The configuration is characterized in that the control signal is sent to the power supply line.

(Function) According to the present invention, when the current value of each branch exceeds a predetermined value, the branch breaker corresponding to this branch performs a breaking operation in the same manner as the conventional one. The total current value of each branch is detected by the current detection device and input to the power control device. The power control device is set with a current value smaller than the cutoff current value of the main breaker, and when the detection signal reaches a predetermined condition with respect to the set current value, the selected specific branch or load is cut off. . Therefore, the current value flowing through the main breaker can be suppressed within the set value, and the main breaker can be prevented from operating to cut off the entire load. Furthermore, since it is possible to select in advance which branch or load to cut off, inconvenience to the user can be minimized by selecting the load connected to that branch or by selecting the load to be cut off.

For branch and load shedding, for example, after one branch or load is shut off, when a set value is exceeded again, the next branch or load is shut off.

The order of disconnecting the branches or loads to be disconnected is set in advance.

Note that when a branch or load is cut off and the detection signal falls below a set value, the cut off branch or load may be automatically restored.

In this case, when the detection signal is lower than the set current value for a certain period of time or more, it can be reset or
By restoring the current when the current value has dropped to a certain level, it is possible to prevent the frequent repetition of disconnecting the branch or load that was restored when the current exceeded the set current value.

However, in addition to automatic recovery as described above, the present invention also provides -
This also includes those in which a branch or load that has been disconnected is not restored until it is operated. In addition, in the present invention, the detection signal reaching a predetermined condition with respect to the set current value means, for example, that the time when the detection signal exceeds the set current value is 0.5 seconds to
This is a case where it lasts for several seconds. 1. The branch or load may be cut off immediately if the current exceeds the set value. Since such conditions can change depending on the accuracy of the current pressure detection device, usage conditions, etc., it is only necessary to set them accordingly. Furthermore, in the present invention, the detection signal exceeding the set current value may or may not include the time when the detection signal becomes equal to the set current value. This is just a design issue.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 14. Reference numeral 1 designates a box body, and in this embodiment, it has an elongated main body 2 with an open top surface, and one end of each of the main body 2 is rotatably supported at both ends of the main body 2 in the longitudinal direction, so that the opening can be closed. It consists of a door body 3as3b. In addition,
An opening 4 is formed in the door 3b. 5 is a main breaker, which is disposed inside the box body. In this embodiment, it is arranged at the right end of the box 1 (FIG. 1). A bus bar 6 is provided approximately at the center of the box 1 from the side surface of the main breaker 5 to the middle of the box 1. This bus bar 6 and the main breaker 5 are
It is connected by electric wire 7. Moreover, a plurality of branch breakers 8as...8 are provided above and below the bus bar 6 (FIG. 1).
n are arranged in a horizontal row. These branch breakers 8as...8n are electrically connected to the bus bar 6, respectively. The structure of the distribution board described so far is relatively common.

Next, reference numeral 10 denotes a current pressure detection device, which detects the value of the current flowing through the main breaker 5. In this embodiment, a current transformer is used. This pressure detection signal from the current detection device 10 is input to the power control device 11 . This power control device 11 compares the detection signal with a preset current value, and if the detection signal exceeds the preset current value for a predetermined period of time, the power control device 11 selects a preselected specific branch or a specific load. This is to block the That is, in this embodiment, four branches and two loads can be interrupted, branch breakers 4a to 4d correspond to these four branches, and the two loads 12a112b are, for example, air conditioners. In this embodiment, four remote control relays are used as the cutoff devices 13a to 13d to cut off the four branches, respectively, to the branch breaker group 8.
It is provided to the right of a to 8n. Since no power is supplied from the branch breakers 8a to 8b to the load side via the cutoff devices 138 to 13d, a special terminal block 14 is provided to simplify wiring. Hereinafter, the four branches that can be shut off will be referred to as branches A to D. Reference numeral 15 denotes a power transformer for operating the cut-off devices 13a to 13d, which are remote control relays. In addition, the two loads 12a, 12
Terminals 16a, 16b are provided near each load 12a, 12b in order to cut off the load 12a, 12b. This terminal device 16a,
16b receives the power line superimposed signal and connects the loads 12a, 12
This controls the power supply to b.

Further, the loads 12a and 12b are provided with receivers 17a and 17b that cut off the power supply to the loads 12a and 12b every time they receive the pulse. Such a terminal device 16
As a and 16b, for example, as shown in FIG. 10, a device that outputs a pulse when receiving a self-addressed power line superimposed signal, which is already used in a telecontrol system, etc. can be used. In addition, the receiving section 1
As 7a and 17b, for example, a known terminal called HA terminal as shown in FIG. 10 can be used as is. In this case, in addition to the control signal line 18, a monitoring signal line 19 is provided, and the loads 12a, 1
By monitoring the status of 2b and sending this information back to the power control device 11, it is possible to prevent things that should be cut off from being activated or things that should be turned off from being turned off. The terminal devices 16a and 16b may not only serve as loads 12a and 12b, but may also control the amount of power supplied by phase control or the like. In addition, the terminal devices 16a and 16b are connected to the loads 12a and 12b.
It may be stored inside.

In this case, it is also possible to provide the terminal devices 16a and 16b with the function of the receiving section and to form an integrated structure.

Next, the configuration of the power control device 11 will be explained in detail. Structurally, this power control device 11 is constructed by laminating two wiring boards 20 and 21 on which electronic components are mounted, and is housed in a metal case 22. Figure 1). Further, the wiring board 20
is provided with an operating section 23 and a display section 24 (details of which will be described later), and the case 22 has an opening so that the operating section 23 and display section 24 can be operated or viewed from the outside. 25 is formed. Furthermore, the operating section 23 and the display section 24 are arranged so as to oppose the window 4 of the door 3a of the box 1. The setting section 23 and the display section 24 also include, for example, translucent holes 26 for switches, etc., which will be described later in the setting section.
A display panel 27 having a required number of . . . and provided with a required display is provided. As shown in FIG. 7, the operation section 23 includes a numeric keypad switch 231, a -slide-on switch 232, a -slide-off switch 233, a ranking setting switch 234, a setting switch 235, and a return switch 23.
It is composed of 6 etc. These switches 231-23
Function No. 6 will be described later. These switches 231 to 236 are loosely fitted into the holes 26 of the display panel 27.

The display section 24 also includes a set current value display section 241, a ranking display section 242, a used current display section 243, and a cut operation display section 2.
44. These display sections 241-2
The 440 function will also become clear from the description that follows. The set current value display section 241 and the ranking display section 2
42 is located on the lower surface side of the display panel, and the current usage display section 243 and the cut operation display section 244 are loosely fitted into the hole 26 of the display panel 27. Note that the display section 24
can be formed using a light-emitting device, liquid crystal, or the like.

You can input information from the operation section 23, or input information from the display section 2.
4 and sends and receives signals to and from the memory 31. 32 is an A/D converter for A/D converting the detection signal from the current detection device 10.
It is a D converter and inputs its digital signal to the arithmetic processing device 30. 33 is a clock means, and 34 is a backup power source for the memory. Further, 35 is a circuit breaker control signal output section, 36 is a power line superimposed signal output section, and 37 is a display command output section. Furthermore, in this embodiment, the branches A-D and the loads 12a, 12b
It has the function of turning on or off all at once.
It also includes a batch-on input section 38 for inputting information about the slide-on switch 232, and a batch-off input section 39 for inputting information about the slide-off switch 233.

The above-mentioned main breaker 5, branch breakers 83 to sn groups, disconnection devices 13a to 13d groups, terminal block 14, and power transformer 15
, the power control device 11 is individually mounted on the bases 40 to 40.
43, and is attached to two rail-shaped bases 44 and 45 arranged vertically in parallel in FIG. These bases 44, 45 are removably attached to the bottom surface of the main body 2 of the box 1 by means such as screws 46, for example. Reference numeral 47 denotes a front panel having window holes 48 and 49 that expose the operation parts of the main breaker 5 and the branch breakers 8a to 8n. Although not shown, the front panel 47 is attached to the bases 44 and 45 using a stand, screws, and the like.

/D /Z Next, the operation of the present invention will be explained with reference to body diagrams G to N. First, regarding assembly, place the box 1 on the wall (
Not shown. ), etc., or embed it. On the other hand, each mounting base 40 to 43 is attached to the base 44.45, and a main breaker 5 and a branch breaker 88 to 8ns remote control relay 13 are attached to each of these mounting bases 40 to 43, respectively.
a to 13d, the terminal block 14, the power transformer 15, and the power control device 11 are attached. The bases 44 and 45, on which the necessary parts have been attached in this manner, are attached to the box 1, electrical wiring is carried out, and the front panel 47 is attached to complete the assembly. In addition, in the above assembly, each mounting base 4
It is also possible to attach the necessary parts to the base 44.45 after attaching the necessary parts to the parts 0 to 43, or to attach the base 44.45 to the box 1 in advance, and the order is not limited to the above order. .

Next, various settings are made prior to use.

This setting is performed by the power control device 11 described above.

10 Clarify. FIG. 4 shows a simplified basic setting processing procedure. When power is supplied, the arithmetic processing unit 30
is reset and begins processing.

Therefore, when the current value, the branches A-D to be cut off, the cutoff order of the loads 12ax12b, etc. are set using the numeric keypad switch 231 of the operation unit 23, these data are read and the data in the memory 31 is updated, and the display data is also updated. Then, this updated data is displayed on the set current value display section 241 or the like.

It goes without saying that the set current value and the cutoff order can be changed freely within a preset range.

1 The first temple map shows the details of the setting process. To set the order of branches A-D and loads 12a, 12b to be cut off, press the order switch 235 and use the numeric key switch 231 to set the order of the corresponding branches A-D or loads 12a, 12b.
12b and presses the return switch 236.

In this case, the last digit of the set current value display section 241 is used to display the circuit number. When the return switch 236 is pressed, the arithmetic processing unit 30 reads the set order, and
If this is appropriate, it is stored in the memory 31.

When setting the order, the order and circuit number input using the numeric keypad switch 231 are displayed in the last digit of the order display section 242 and the set current display section 241, so that the operator can set the order while confirming the order. In setting the ranking, if the input data exceeds a permissible value, it is determined that an error has occurred, and an error display such as scrolling or flashing the relevant display section is performed.

The current value setting is performed on the condition that the ranking is not being set and the return switch 236 is pressed. After pressing the current setting switch 235, press the numeric keypad switch 23.
1, input the current value and press the return switch 236.
This data is read and stored in the memory 31 as appropriate. In setting this current value as well, the current value input using the numeric keypad switch 231 is displayed on the current value display section 241, so the operator can set it without confirming it.

If the input data exceeds the allowable value, it is determined that it is an error and the same error message as above is displayed.

In use, the current detection device 10 detects the current flowing through the main breaker 5 and inputs this to the power control device 11 . The power control device 11 is an A/D converter 32
converts the detection signal into a digital signal and inputs it to the arithmetic processing unit 30. In the arithmetic processing unit 30, when the -induction switch 232 and the slide-off switch 233 are not pressed, this digital signal is compared with the set current value. As a result of the comparison, the detection signal is higher than the set current value,
And when it continues for a predetermined period of time, for example, 0.5 seconds,
Updates data regarding the branch or load to be cut off and outputs a cutoff signal. It also outputs a display command indicating the cut off branch or load to the cut operation display section 244. In this embodiment, the order of interruption is branched ASB, C, D, load 12a,
12b (corresponds to the order of circuits 1 to 6 in Figure 7)
, First, branch A is cut off. Further, if the detection signal is equal to or higher than the set current value (or when it subsequently becomes equal to or higher than the set current value), the same process is performed and the next branch B is cut off. When the pre-specified branch A-D is completely cut off, a power line superimposed signal is output, and the terminal device 16
The load 12a is cut off via a. And branch A-D
And after all the loads 12a, 12b are cut off,
Since there is nothing to cut off anymore, when the detection signal exceeds the set current value from now on, the master breaker 5 operates to cut off as in the conventional distribution board. However, if the total capacity of branches or loads set in advance for interruption is appropriately selected, it will be understood that it is extremely rare for the main breaker 5 to disconnect.

As mentioned above, the identified branches A-D, loads 12a, 1
When the detection signal falls below the set current value while all of the load 12b is cut off and continues for a predetermined period of time, for example, one minute, the load 12a, that is, the air conditioner, is automatically restarted. ruQa
, outputs a power line superimposed signal for ON control to the terminal device 16a. Further, when the detection signal becomes lower than the set current value and continues for a predetermined period of time, for example, one minute, the load 12b, that is, the air conditioner, is automatically reset. In this embodiment, only the loads 12a and 12b are automatically restored, and the branches are set not to be automatically restored. Of course, it is also possible to automatically return to a branch. However, considering that it is unclear which load will be connected to the branch, or that a heat-generating device may be connected, it is thought that it is better for safety not to automatically restore the branch.

Note that the present invention is not limited to the above-mentioned embodiments, but allows various modifications. For example, the disconnection device may be constructed using a relay other than a remote control relay or a semiconductor switch such as a SIRISK.

[Effects of the Invention] As described above, the present invention can interrupt a specific branch or load before the current flowing through the main breaker reaches the interrupting current of the main breaker. Therefore, unlike traditional distribution boards, it may suddenly cut off the entire load and confuse users.
This can prevent important loads from being undesirably cut off and causing secondary accidents. Furthermore, not only branches but also loads can be selectively shut off, making it possible to perform extremely fine power control. Since this load control uses power lines, no special wiring is required and it can be provided at low cost.

Additionally, since it can basically be handled in the same way as a conventional distribution board, installation does not require complicated construction or operation.

Furthermore, since conventional main breakers, busbars, branch breakers, etc. can be used as they are, parts are interchangeable, and from this point of view, it can be provided at low cost.

[Brief explanation of drawings]

1 to 1 schematic drawings show one embodiment of the present invention. FIG. 1 is a front view with the door open, FIG. 2 is a front view with the front panel attached, and FIG. Figure 3 is a front view with the door closed, Figure 4 is a sectional view taken along the and a block diagram schematically illustrating electrical connections. 1...Box body, 5...Main breaker, 8a-8n...
・Branch breaker, 10...Current detection device, 11...
Power control device, 13a to 13d...Cutoff device, 16a
116b...terminal device

Claims (1)

[Claims] (1) A main breaker; A busbar connected to this main breaker; A plurality of branch breakers provided corresponding to a plurality of branches and connected to the busbar; A branch breaker selected from the plurality of branch breakers. a cutoff device that is installed on the output side of a specific branch breaker and can cut off the power supply to the corresponding branch by being controlled; a terminal device that controls the power supply to the corresponding load; a current detection device that detects a current value flowing through the main breaker; a current value that is set to a smaller current value than the breaking current value of the main breaker; When a detection signal is input and the detection signal reaches a predetermined condition for the set current value, the main breaker a power control device that suppresses a current value flowing through the circuit within the set value; the main breaker, the busbar, and the plurality of branch breakers;
A distribution board device comprising: a box housing a cutoff device, a current detection device, and a power control device;