JPH0993784A - Power saving and overload avoidance apparatus and power saving and overload avoidance method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent closing of a main breaker when a current exceedes the rated current by selecting branching breakers having a remote opening/closing function for opening a necessary number of breakers selected in accordance with the lower priority set by the particular expression to open the selected breakers. SOLUTION: A remote opening/closing signal generator executes calculation in the arithmetic means and calculates, when a value Is of excessive current exists (Is<0), the number of the opening branching breakers 2, 2,... having the remote opening/closing function N=Is/k using the constant k depending on the value of excessive current. In this timing, a necessary number of opening branching breakers having the remote opening/closing function 2, 2... are selected from those having a predetermined lower priority among those in the closed condition to cut off the current thereof. Thereby, closing the main circuit breaker when a current is exceeding the rated current can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is set on the basis of a contract current with an electric power company by setting a priority order for flowing electricity and cutting a branch breaker of a circuit having a low order only by mounting on an indoor wiring. If the main breaker does not accidentally fall down even if the power that exceeds the rated current is used, and if the overload condition is resolved,
BACKGROUND OF THE INVENTION 1. Field of the Invention The branch breaker relates to a power saving and overload avoiding device that can automatically return to use electricity without waste and a power saving and overload avoiding method using the same.

[0002]

2. Description of the Related Art In recent years, electric appliances such as televisions, microwave ovens, washing machines, refrigerators and air conditioners, word processors, copying machines,
With the development and popularization of various electric devices such as computers, personal computers, telephones, and faxes, the use of electric power is increasing year by year in general households, companies, factories, etc. Is often used, and the main breaker is often dropped to ensure safety.

In such a case, there are some devices that have little effect even if a temporary power failure occurs, but in the case of a word processor, a personal computer, a computer, etc., if the electricity is cut off, the data information up to that point will be lost, resulting in great damage. Some equipment may suffer. Therefore, if a large contract current or rated current is contracted with an electric power company, the amount of waste of electricity used will increase, and the contract electricity charge will also become high.

Conventionally, the indoor wiring provided below the main breaker connected to the service line is provided with an indoor trunk line and a plurality of branch circuits branching from the indoor trunk line, and a plurality of branch circuits are also provided in the branch circuit. A small branch breaker is installed to shut off the branch circuit when an overload condition occurs in each branch circuit.However, if the full load current of the main breaker is exceeded, shut off the main breaker. There was no specific implementation of the device or method for avoiding it.

[0005]

Generally, even when a small branch breaker is used for indoor wiring, in order to use electricity efficiently and ensure safety, a plurality of branch breakers may be used in accordance with the rated current of the main breaker contract. The sum of the rated currents of is set to be larger. For example, if the basic contract has a rated current of 50A and there are three branch circuit breakers, the rated current of each branch breaker is 20A x
It is usually set to 3. Thus, even if the load of each branch circuit is within the rated current range, if the total load of the three branch breakers exceeds the rated current, the main breaker shuts off and no current flows in all branch circuits. . As a result, if there is a device that is troubled by an unplanned power failure, it is anxious because unexpected damage may occur. The present invention is intended to obtain power saving and energy saving effects while eliminating such a sudden break of the main breaker and anxiety accompanying it.

That is, according to the present invention, a current detector capable of measuring a full load current is attached to indoor wiring provided below the main breaker, and a plurality of branch breakers or remote control relays are attached to a plurality of branch circuits. A controller is connected in advance, and the controller calculates and calculates the current excess and the current excess from the full load current value measured by the current detector by the controller, and in the former case, the priority order of flowing electricity is decided and the rank is low. Sends a signal to turn off the circuit breaker or remote control relay, and in the latter case, sends a signal to turn on the power to turn off the branch breaker or remote control relay of the circuit with a higher priority. This allows you to inadvertently use power that exceeds the rated current that is set based on the current contracted with the utility. It was as not to down breaker falls. Moreover, the present invention is a power-saving and overload avoidance device that can automatically use the branch breaker or the remote control relay automatically when the overload condition of the main breaker is resolved, so that electricity can be used effectively without waste. It is intended to embody a power saving and overload avoidance method using the.

[0007]

[Means for Solving the Problems] Means for solving the above technical problems are configured as follows.

The first invention for which a patent is sought is followed by a main breaker (main switch and overcurrent breaker) connected to the service line, followed by an indoor trunk line and a plurality of branch circuits branching from the indoor trunk line. In the indoor wiring in which the loaders can be connected to the branch circuits respectively, it can be installed at the base of the indoor trunk line, and the total load current flowing through the installed indoor trunk line can be measured. A current detector that converts the load current value to an AC voltage signal and sends it to the controller, and a branch breaker that can be attached to the base of each of the multiple branch circuits that have branched, and that has a transmission path and a remote switch function. Allows the main breaker to input and set a preset rated current value based on the contract current with the electric power company, and attaches it to each of multiple branch circuits The condition setting part that allows the priority order to be input and set to the branch breaker with remote switch function and the measured value of the full load current measured by the current detector connected to the current detector to be the AC voltage signal. As a DC voltage signal and then a digital signal, and a measured value Iz of the full load current converted by the measured signal converter and a rated current value It preset. Are compared (It-Iz = Is),
Connected to the computing unit that computes whether the current is exceeded (Is <0) or excess current (Is> 0) and the branch breakers with remote switch capability, and the OFF signal or the close signal to open them. If the current is exceeded as a result of calculation by the calculation unit, the
For s <0), the number (N = Is / k) of the branch breakers with remote switch function to be opened is calculated according to the magnitude of the current excess, and a plurality of closed breaker (ON) states are calculated at that time. Of the remote switchgear capable branch breakers, select and specify the required number N of remote switchgear capable branch breakers calculated from the previously set low priority branch breaker, and send an OFF signal to open them. Opened N number of branch breakers with remote switch capability selected almost at the same time (OF
F) so as not to cut off the current, and when there is a surplus current (Is> 0) as a result of the calculation by the calculation unit, a plurality of remote switches that are in the open (OFF) state at that time. Remote switch that closes the branch breakers with capability that are closed in descending order of priority, selects and specifies the branch breakers with capability, sends an ON signal to close them, and selects the selected remote switch A power-saving and overload avoidance device, characterized in that a controller comprising a remote switching signal generator configured to close a functioning branch breaker and return to an energized state is combined.

A second invention to be granted a patent is that a main breaker (a main switch and an overcurrent breaker) connected to a service line is followed by a poorly wired indoor trunk line, and a plurality of branches branched from the indoor trunk line. The branch circuit is wired, and a small branch breaker is connected to each of the plurality of branch circuits as needed, and in the indoor wiring that can be connected to the loader, it can be attached to the base of the inner trunk line, It can measure the total load current flowing through the installed indoor trunk line, converts the measured total load current value into an AC voltage signal and sends it to the controller, and the branch breaker installed in each branched branch circuit. A remote control relay that can be installed unsuccessfully and can turn on / off (ON / OFF) the flow of current to the branch circuit, and a main breaker A condition that allows the preset rated current value to be input and set based on the contract current with the electric power company, and the priority order to be set and input to the remote control relays installed in each of the multiple branch circuits. Measurement that connects to the setting unit and the current detector, receives the measured value of the full load current measured by the current detector as an AC voltage signal, converts this to a DC voltage signal, and then converts it to a digital signal The signal converter and the measured value Iz of the full load current converted by the measured signal converter are compared with the preset value It of the rated current It (It-
Iz = Is), and a calculation unit for calculating whether the current is exceeded (Is <0) or the current is surplus (Is> 0).
When the remote control relays are connected to each other so that an OFF signal for cutting them or an ON signal for inputting them can be sent, and a current is exceeded as a result of calculation by the calculation unit (I
For s <0), the number of remote control relays to be cut off (N = Is / k) is calculated according to the magnitude of excess current, and among the plurality of remote control relays that are in the input (ON) state at that time. Select and specify the required number of remote control relays that cut the required number N calculated from the ones with the lowest priority set earlier, send an OFF signal to cut them, and turn off the selected N number of remote control relays almost at the same time. Current is cut off, and if there is a surplus current (Is> 0) as a result of calculation by the calculation unit, the remote control relays that are in the cut-off state at that time are first A remote switching signal that selects and specifies the remote control relays to be input in order from the one with the set highest priority, sends an ON signal to input to them, and inputs the selected remote control relays to return to the energized state. A controller composed of a raw part, a power-saving and overload avoidance device is characterized in that combination.

A third invention for which a patent is sought is a) a main breaker (a main switch and a main switch) which is provided with the power saving and overload avoidance device described in the first invention or the second invention, and which is connected to a lead wire of indoor wiring. A current detector is attached to the indoor trunk line that is wired below (overcurrent breaker), and a branch breaker with a remote switch function or a remote control relay is attached to each of the multiple branch circuits branching from the indoor trunk line. By connecting a controller to the detector and the branch breaker with remote switch function or remote control relay, the power saving and overload avoidance device is installed in the indoor wiring.

B) By inputting and setting a rated current value, which is set on the basis of the contract current with the electric power company, in the condition setting section of the controller, the main breaker is converted into an AC voltage signal and then converted into a DC voltage signal. Converted to a voltage, converted to a digital signal and stored as the rated current value It, and set the priority order to the branch breaker with remote switch function or remote operation relay attached to each of the multiple branch circuits. Keep it.

C) Using the current detector, measure the total load current of the indoor wiring, and transmit the measured total load current value as an AC voltage signal.

D) The measurement signal converter of the controller receives the transmitted AC voltage signal of the measured full load current, converts the AC voltage signal into a DC voltage signal, and further converts it into a digital signal to obtain the full load current. The measured value is Iz.

E) In the arithmetic unit of the controller, the measured value Iz of the full load current and the numerical value It of the rated current input and stored in advance are compared and calculated (It-Iz = Is) to determine whether the current is exceeded (Is). <0) or whether there is excess current (Is> 0) is calculated.

F) In the remote switching signal generator of the controller, if the result of the calculation by the calculator indicates that the current exceeds the current (Is <0), the current excess value Is is set to a predetermined constant K.
(N = Is / k) to calculate the number of branch breakers with remote switch capability or the number of remote control relays to be cut (N), and at that time the switch is in the closed or input (ON) state. OFF signal to open or cut the remote control relays that cuts the required number N calculated from the ones with the lowest priority set among the plurality of branch breakers with remote switch capability or the remote control relays to cut. To send.

G) In the remote switching signal generator of the controller, if there is a surplus current (Is> 0) as a result of the calculation by the calculator, a plurality of remote switches that are in the open or closed state at that time. Select a branch breaker with switch capability or a remote control relay that closes or inputs (turns on) in order from the one with the highest priority set earlier, and select them. An ON signal for closing or inputting is transmitted.

H) When the OFF signal for opening or closing transmitted in the step f) is received, the current is opened and closed by opening or closing the selected N number of the branch breakers with remote switch capability or the remote operation relays almost at the same time. Make it shut off.

I) The branch breaker with the remote switch function or the remote operation relay selected in the step g) is closed or input to restore the energized state. The power saving and overload avoidance method includes steps a) to i).

[0018]

EXAMPLES The present invention will be described in detail below based on examples. FIG. 1 is an explanatory diagram showing a basic configuration and an embodiment of the first invention, FIG. 2 is an explanatory diagram showing a basic configuration and an implementation outline of the second invention, and FIG. 3 is a power saving and overload avoidance device according to the present invention. 4 is a block diagram showing the configuration of FIG. 4, FIG. 4 is a flowchart showing the operation of the present invention, and FIG. 5 is a flowchart showing the step configuration of the third invention. FIG.
FIG. 4 is an electrical internal circuit diagram of a breaker with a remote opening / closing function.

First, the first invention will be described in detail based on embodiments. As shown in FIG. 1, the basic configuration of the power saving and overload avoidance device according to the first aspect of the present invention is to secure or interrupt the flow of current to the current detector 1 that measures the full load current and the branch circuit 5b. Branch breaker with remote opening and closing function 2,
2, ..., The measured value information of the full load current obtained from the current detector 1 is organized to calculate whether the current exceeds the current or excess current, and when the current exceeds, the priority order is determined. Branch breaker with remote opening / closing function
It is composed of a controller 3 that issues a command to shut off the required number from ..., and conversely, in the case of excess current, issues a command to recover from the branch breaker with remote switching function 2, 2, ... of the branch circuit with high priority. Has been done.

That is, the current detector 1 as a component is a sensor, the branch breakers 2, 2, ... With remote switching function are operating devices, and the controller 3 is the control of the branch breakers 2, 2 ,. It has a role as a device. Moreover, the power saving and overload avoiding device can realize its action and effect by being mounted on the indoor wiring 5 provided below the main breaker 4 and implemented.

The indoor wiring 5 follows the main breaker 4 connected to the service line H, and the indoor trunk line 5a and a plurality of branch circuits 5b, 5b, 5 branching off from the indoor trunk line 5a.
., and the branch circuits 5b, 5b, 5b, ...
Load devices 6 (61, 62, 63, ... 6n) respectively.
It is a wiring that can be connected. The indoor wiring 5 is wiring indoors below the service entrance of a place where electricity is used, such as a general household, a factory, and an office. The indoor electric circuit is often touched by humans, and if used incorrectly, there is a risk of causing various electric shocks and fires. Therefore, it is stipulated that the working voltage of the indoor electric circuit must be low. Normally, except for special cases, the AC voltage is specified as 150V or less,
Specifically, 100 V is used for indoor wiring for general households, and 200 V is used for factories.

The main breaker 4 has a rated current (for example, 20 in a general household) in advance based on a contract current with an electric power company.
A to 50 A) can be set, and energization is cut off when an overload exceeding the rated current occurs. When the rated current of the indoor wiring 5 is set to a large value, the branch circuit 5a is branched into 15A, 20A, etc. for each branch circuit 5a to prevent an accident such as electric shock or fire by lowering the working voltage of indoor dew condensation. It is stipulated that a small branch breaker Z or the like be attached to each 5a.

The current detector 1 is attached to the base of the indoor trunk line 5a, measures the total load current flowing through the indoor trunk line 5a, and converts the measured total load current value into an AC voltage signal. It has a function of transmitting to the controller 3. The current detector 1 in the illustrated example used an existing current sensor that is commercially available. This commercially available current sensor is configured to convert the detected full load current into an AC voltage value and transmit the AC voltage value.

The branch breakers 2, 2, ... With the electric circuit securing and remote opening / closing functions of the present invention are each a plurality of branched branch circuits 5.
It is attached to the base parts of b, 5b, .... In the illustrated example, a commercially available remote control breaker is used as the branch breakers 2, 2, ... With the remote opening / closing function. The remote control breaker is composed of the electrical internal circuit shown in FIG. The controller 3 is connected to the switch parts (ON and OFF parts) of the electric internal circuit by a two-wire system, and can be opened / closed by an operation command signal from the controller 3.

The branch breakers 2, 2, ... Of the present invention
Is operated by a remote operation command signal (OFF signal or ON signal) of the controller 3. The operation purpose instructed by the controller 3 is resolved when the current overload occurs in the full load current by substituting the branch breakers with remote switching function 2, 2, ... In addition to avoiding the operation of 4, the branch breaker with a remote switching function of high priority 2, when the excess current occurs in the full load current,
It is designed to automatically recover from 2, ...

That is, even if overload does not occur in each branch circuit 5b, 5b, ... If the full load current is exceeded, the branch breakers with remote switching function 2, 2 ,. When there is an excess in the full load current due to the interruption, the branch breakers with remote switching function 2, 2, ... Having a high priority order are automatically restored for adjustment. Therefore, the technical idea is basically different from the one in which the main breaker 4 and the small branch breaker Z are provided in the indoor wiring for the sake of safety, and a mechanism for completely different operation is added. Is. In the case of indoor wiring in which both the main breaker 4 and the small branch breaker Z are provided for safety and security, it is desirable to adopt the mode of the second invention shown in FIG.

Next, the controller 3 will be described. As shown in FIG. 2, the controller 3 includes a condition setting unit 7, a measurement signal conversion unit 8, a calculation unit 9, and a remote opening / closing signal generation unit 10.

The condition setting section 7 includes a main breaker 4
A preset rated current Iz based on the contract current with the electric power company can be input and set, and a branch breaker with a remote switching function attached to each of the plurality of branch circuits 5b, 5b, 5b, ... It is configured so that the priorities can be input and set to 2, 2, .... In the illustrated embodiment, the input setting information is stored as a digitized numerical value It. The measurement signal converter 8 of the controller 3 is connected to the current detector 1,
The measured value of the full load current measured by the current detector 1 is received as an AC voltage signal and converted into a DC voltage (R
In addition to MS conversion), it is also converted into a digital signal (A / D)
(Conversion) to obtain the measured value Iz.

The calculation unit 9 compares the measured value Iz of the full load current converted by the measured signal converter 8 with the preset value It of the rated current (It-Iz = Is).
Then, it is calculated whether the current exceeds the current (Is <0) or the current exceeds the current (Is> 0). In the embodiment shown in FIG. 3, since the CPU of the microcomputer is used as the arithmetic unit 9, preprocessing is performed by the I / O board so that the information signal can be input, and the arithmetic operation is performed by the CPU.

The remote opening / closing signal generator 10 is connected to each of the branch breakers 2, 2, ... With remote opening / closing function and can send an OFF signal for opening them or an ON signal for closing them. It is a thing.

In the remote switching signal generator 10, when the current is exceeded as a result of the calculation by the calculator 9 (Is <0).
, The number of branch breakers 2, 2, ... with remote switching function to open depending on the size of the excess current (N = Is /
k) is calculated, and the required number N of the branch breakers with remote switching functions 2, 2, ... Which are in the closed (ON) state at that time are opened in the required number N. Select the branch breakers 2, 2, ... With remote opening / closing function, send an OFF signal to open them, and open (OFF) the selected N number of branch breakers with remote opening / closing function 2, 2. Then, the current is cut off. Here, k is a constant calculated from the breaking characteristic of the main breaker 4.

Further, in the remote switching signal generating section 10, when there is a surplus current as a result of the calculation by the calculating section 9 (Is>
In 0), the remote opening / closing is performed in such a manner that the branch breakers with remote opening / closing functions 2, 2, ... Select the branch breakers with function 2, 2, ... to send an ON signal to close them, and close the selected branch breakers with remote opening function 2, 2, ... to turn ON.
It is configured to return to the state.

Next, the second invention will be described in detail based on embodiments. As shown in FIG. 2, the basic configuration of the power saving and overload avoidance device according to the second aspect of the invention is to secure a current flow to the current detector 1 that measures the full load current and the branch circuits 5b, 5b, .... Remote control relay 2'that shuts off or shuts off,
2 ', ..., and the measured value Iz information of the full load current obtained from the current detector 1 are arranged and whether the current exceeds the current (Is <
0) or excess current (Is> 0) is calculated, and in the case of excess current (Is <0), priorities are determined and remote control relays 2 ′, 2 ′, ... Outputs an OFF signal that cuts the required number from the
In the case of 0), input from the remote control relays 2 ', 2', ...
It is composed of a controller 3 which outputs an N signal.

That is, the component current detector 1 is a sensor, the remote control relays 2 ', 2', ... Are operating devices, and the controller 3 is a remote control relay 2 ', 2' ,.
Has a role as a control device. Moreover, the power saving and overload avoiding device can realize its action and effect by being mounted on the indoor wiring 5 provided below the main breaker 4 and implemented.

Indoor wiring suitable for mounting the second invention 5
Follows the main breaker 4 connected to the service line H, and poorly wires the indoor trunk line 5a and a plurality of branch circuits 5b, 5b, 5b, ... Branching from the indoor trunk line 5a, and the branch circuits 5b, 5b, .. are connected to small branch breakers Z, Z, .., and load devices 61, 62, 63, ..

The current detector 1 of the second invention is the same as that of the first invention. The remote control relays 2 ', 2', ... Can be attached to the branched branch circuits 5b, 5b, .. (If the small branch breakers Z, Z, .. Therefore, the branch circuits 5b, 5b, ...
It enables / disables (ON / OFF) the flow of current to / from. In the illustrated embodiment, commercially available remote control relays and products called control relays were used, but they were sufficient. However, these remote control relays 2 ', in order to correspond to the existing distribution board when mounting on the indoor wiring,
2 ′, ... Are installed below the small branch breakers Z, Z, ..., and current is turned on / off before the small branch breakers Z, Z ,. As a result, it has been found that the remote control relays 2 ′, 2 ′, ... Can exhibit the same operational effects as the branch breakers 2, 2 ,. Moreover, the remote control relays 2 ', 2', ... Are more compact than the branch breaker and the sound during operation is quieter.

Even in the indoor wiring where the small branch breakers Z, Z, ... Are not provided, instead of the branch breakers 2, 2 ...
Of course, it is possible to use ...

The configuration and operation of the controller 3 of the second invention are also the same as those of the first invention, so a detailed description thereof will be omitted here.

A third invention is a power saving and overload avoiding method which is performed by using the power saving and overload avoiding device described in the first invention or the second invention. FIG. 4 shows the steps of the power saving and overload avoidance method in order. Less than,
Each step will be described.

A) The power saving and overload avoidance device described in the first invention or the second invention is prepared, and the current is supplied to the indoor trunk line 5a laid below the main breaker 4 connected to the service line H of the indoor wiring 5. The detector 1 is attached to the plurality of branch circuits 5b, 5b, ... Branching from the indoor trunk line 5a,
Remote branching breakers 2, 2 ... Or remote control relays 2 ', 2', ... are attached respectively, and the current detector 1 and the remote breaker branching breakers 2, 2, ... Or remote control relays 2 ', 2 are attached. By connecting the controller 3 to the ', ..., The power saving and overload avoidance device is attached to the indoor wiring 5.

B) By inputting and setting the rated current value It set in the condition setting unit 7 of the controller 3 in the main breaker 4 based on the contract current with the electric power company, this is converted into an AC voltage signal. After that, this is converted into a DC voltage (RMS conversion), and further converted into a digital signal (A /
D conversion) and store it as the value It of the rated current, and the branch breakers 2, 2, ... With remote opening / closing function or the remote control relays 2 ', 2'which are attached to each of the plurality of branch circuits 5b, 5b ,. Priority is set to.

C) Indoor wiring 5 using the current detector 1
Is measured and the measured value of the total load current is transmitted as an AC voltage signal.

D) The measurement signal converter 8 of the controller receives the transmitted AC voltage signal of the measured value of the full load current and converts it to a DC voltage (RMS conversion).
Then, it is further converted into a digital signal (A / D conversion) to obtain the measured value Iz of the full load current.

E) In the arithmetic unit 9 of the controller, the calculated numerical value Iz of the full load current and the numerical value It of the rated current input and stored in advance are compared and calculated (It-Iz = Is).
Then, it is calculated whether the current exceeds the current (Is <0) or the current exceeds the current (Is> 0).

F) Remote opening / closing signal generator 1 of the controller
At 0, if the current is exceeded as a result of calculation by the calculation unit 9 (Is <0), the current excess value Is is divided by a predetermined constant K (N = Is / k) to provide a remote opening / closing function. The number of branch breakers 2, 2, ... Or the number (N) of remote control relays 2 ', 2', ... to be cut off is calculated, and a plurality of remote opening / closing functions that are closed or input (ON) at that time. .. or remote control relays 2 ', 2', ... which cut the required number N calculated from the ones having the lowest priority among the remote control relays 2 ', 2' ,.
O for selecting 2 ', ... and opening or cutting them
Send an FF signal.

G) In the remote switching signal generator 10 of the controller, if there is a surplus of current (Is> 0) as a result of the calculation by the calculator 9, a plurality of open / closed states are present at that time. Remote breaker with remote opening / closing function 2, or remote operation relays 2 ', 2', ... with remote opening / closing function that closes or inputs (turns ON) in order from the highest priority The branch breakers 2 and 2 or the remote control relays 2 ′, 2 ′, ... Are selected and an ON signal for closing or inputting them is transmitted.

H) Upon receiving the OFF signal for opening or closing transmitted in the step f), the N selected number of branch breakers with remote opening / closing functions 2 are almost simultaneously received.
2, ... or remote control relays 2 ', 2', ... are opened or cut to cut off the current.

I) Close or input the branch breakers 2, 2, ... With remote opening / closing function or the remote control relays 2 ', 2', ... Selected in the step g) so as to return to the ON state. Eggplant

The third invention is a power saving and overload avoiding method including the steps a) to i).

[0050]

[Effect] The invention of the present application determines the priority order of flowing electricity by simply mounting it on the indoor wiring and shuts off the branch breaker of the circuit with the lower rank, thereby setting the rating based on the contract current with the electric power company. Prevents the main breaker from accidentally dropping even if the power that exceeds the current is used, and when the overload condition is resolved, the branch breaker is automatically restored to use electricity well without waste. A power saving and overload avoiding device that can be used and a power saving and overload avoiding method using the same.

The first invention and the second invention are power saving and overload avoidance devices, in which a plurality of current detectors capable of measuring full load current are attached to indoor wiring provided under the main breaker. Attach multiple branch breakers with remote switching function or remote control relays to the branch circuit, connect a controller to both, and exceed the current from the full load current value measured by the current detector by the controller,
In the former case, the excess current is calculated and calculated. In the former case, the priority order for passing electricity is determined, and the OFF signal for opening (turning off) the branch breaker or the remote control relay of the branch circuit with the lower order is output. In the latter case, Decides the priority of turning off electricity and outputs a signal for closing (inputting) a branch breaker or a remote control relay of a high-ranking branch circuit,
This prevents the main breaker from accidentally dropping even when using power that exceeds the rated current that is set based on the current contracted with the power company.
When the overload state is resolved, the branch breaker is automatically restored so that electricity can be used effectively without waste and is a power saving and overload avoidance device. That is, the device of the present invention has the following advantages. The basic contract current with the electric power company can be set to the required minimum. Even if the total load current becomes overloaded, the main breaker does not drop, and the priority can be set for the branch circuit to be cut off, so that unexpected failures can be minimized. Electricity can be used efficiently and effectively within the range of basic contract current, resulting in power saving and energy saving effects.

The third invention is a power saving and overload avoidance method. This method first installs the device in the indoor wiring, and prioritizes the branch breaker or the remote control relay when the rated current of the main breaker and the opening and closing of the main breaker. Just by attaching the switch, if an overload condition occurs, the required number of branch breakers or remote control relays will be automatically shut off from the one with the lowest priority, and if the overload condition is resolved, it will be automatically The branch breaker or remote control relay can be restored from the one with the lowest priority. In this way, it is very convenient to operate only at the initial setting, and after that, you can save power and avoid overload by only regular maintenance.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a basic configuration and an outline of implementation of a first invention.

FIG. 2 is an explanatory diagram showing an outline of implementation of the basic configuration of the second invention.

FIG. 3 is a blob diagram showing a configuration of a power saving and overload avoidance device according to the present invention.

FIG. 4 is a flowchart showing the operation of the present invention.

FIG. 5 is a flowchart showing a step configuration of a third invention.

FIG. 6 is an electrical internal circuit diagram of a branch breaker having a remote opening / closing function.

[Explanation of symbols]

 1 ... current detector 2 ... branch breaker with remote switching function 2 '... remote control relay 3 ... controller 4 ... main breaker 5 ... indoor wiring 5a ... indoor trunk line 5b ... branch circuit 6 ... load device (61, 62, ... 6n) 7 ... Condition setting part 8 ... Measurement signal conversion part 9 ... Calculation part 10 ... Remote switching signal generation part Iz ... Measured value of full load current It ... Numerical value of rated current Is <0 ... Excess current Is> 0 ... Extra current H ... Service line Z ... Small branch breaker

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenichi Yamaguchi 237 Yamagishi Miyawaki, Kamiyama City, Yamagata Prefecture Rebun Engineering Co., Ltd.

Claims (3)

[Claims] 1. A main breaker (main switch and overcurrent breaker) connected to a service line is followed by an indoor trunk line and a plurality of branch circuits branching off from the indoor trunk line. In the indoor wiring that can connect the load equipment, it can be installed at the base of the indoor trunk line, the total load current flowing through the installed indoor trunk line can be measured, and the measured total load current value is converted into an AC voltage signal. A current detector that sends a signal to the controller, a branch breaker (branch switch and overcurrent breaker) that can be attached to the base of each branch circuit and has a function to secure the transmission path and a remote switching function, and a main breaker In addition to being able to input and set a preset rated current value based on the contract current with the electric power company, it can be attached to each of multiple branch circuits. A condition setting part that can set priority input to the branch breaker with remote switching function and the measured value of full load current measured by the current detector connected to the current detector, and the AC voltage signal Received as
A measurement signal conversion unit that converts this into a DC voltage signal and then a digital signal is compared with the measured value Iz of the full load current converted by the measurement signal conversion unit and the preset value It of the rated current It (It). -Iz = Is), and a calculation unit for calculating whether the current exceeds (Is <0) or surplus current (Is> 0) and each branch breaker with remote switching function are connected. OFF to open
A signal or a closing ON signal can be sent, and if there is a current excess (Is <0) as a result of computation by the computing unit, a remote opening / closing function that opens depending on the magnitude of the current excess is provided. Number of branch breakers (N = Is /
k) is calculated, and the required number N of the branch breakers with a remote switching function that are in the closed (ON) state at that time are opened, and the required number N is calculated from the one with the lowest priority. Select and specify the functioning branch breakers, send an OFF signal to open them, and open (OFF) the selected N number of branching breakers with remote switching function to cut off the electric current, and also calculate If there is an excess current as a result of calculation by the section (Is> 0)
, A branch breaker with a remote opening / closing function is selected from the branch breakers with a remote opening / closing function that are in the open (OFF) state at that time, and the branch breaker with a remote opening / closing function is selected and specified in order from the one with the highest priority. ON to close them
A power-saving feature characterized by combining a controller that is configured to send a signal, close a selected branch breaker with a remote switching function, and restore the power to an energized state. And an overload avoidance device. 2. A main breaker (main switch and overcurrent breaker) connected to a service line is provided, and an indoor trunk line is poorly wired, and a plurality of branch circuits branching from the indoor trunk line are wired, Small branch breakers are connected to the branch circuits as necessary, and in the indoor wiring that can connect load equipment, it can be installed at the base of the indoor trunk line and the total load current flowing in the installed indoor trunk line can be It can be measured and can be attached to the current detector that converts the measured full load current value into an AC voltage signal and sends it to the controller and the branch breaker attached to each branched circuit. Based on the contract current with the electric power company, the remote control relay that can turn on / off (ON / OFF) the current flow of the And a current setting unit, in which a preset rated current value can be input and set, and a priority order can be input and set to remote control relays attached to each of a plurality of branch circuits. Connected to, receive the measured value of the full load current measured by the current detector as an AC voltage signal, convert it to a DC voltage signal and then convert it to a digital signal, and a measurement signal converter The measured value Iz of the full load current converted by the unit and the value It of the rated current which is input and set in advance are compared (It-Iz = Is) to determine whether the current exceeds the current (Is <0) or the excess current. Is there (Is>
0) is connected to each of the remote control relays and the OFF signal to turn them off or the ON signal to be input is made to be able to be sent, and when the current is exceeded as a result of the calculation by the calculation unit. (Is <0), depending on the magnitude of excess current, the number of remote control relays to be cut off (N = Is
/ K) is calculated, and a remote control relay that cuts the required number N, calculated from the one with the lowest priority set earlier, is selected from the multiple remote control relays that are in the input (ON) state at that time. When an OFF signal for disconnecting them is specified and the selected N number of remote control relays are cut off at the same time to cut off the current, and when there is an excess current as a result of calculation by the calculation unit ( Is> 0),
From the multiple remote control relays that are turned off at that point, select and specify the remote control relays to be input in order from the one with the highest priority set earlier, send the ON signal to input to them, and select Power saving and overload avoidance device, characterized in that it is combined with a controller comprising a remote opening / closing signal generating section for inputting the remote control relay to restore the energized state. 3. A) The power-saving and overload avoidance device according to claim 1 or 2 is prepared, and wiring is provided below a main breaker (main switch and overcurrent breaker) connected to a lead wire of indoor wiring. A current detector is attached to the indoor trunk line, and multiple branch circuits branching from the indoor trunk line are
A branch breaker with a remote switching function or a remote control relay is installed, respectively, and a controller is connected to the current detector and the branch breaker with a remote switch function or a remote control relay to attach the power saving and overload avoidance device to indoor wiring. To do. b) By inputting and setting the rated current value set based on the contract current with the electric power company in the condition setting section of the controller, this is converted into an AC voltage signal and then converted into a DC voltage. Then, it is further converted into a digital signal and stored as the value It of the rated current, and the priority order is input and set to the branch breaker with a remote switch function or the remote operation relay attached to each of the plurality of branch circuits. c) Using the current detector, measure the total load current of the indoor wiring, and send the measured total load current value as an AC voltage signal. d) In the measurement signal converter of the controller, receiving the transmitted AC voltage signal of the measured full load current value,
This is converted into a DC voltage signal, and further converted into a digital signal to obtain the measured value Iz of the full load current. e) In the arithmetic unit of the controller, the measured value Iz of the full load current and the numerical value It of the rated current input and stored in advance are compared and calculated (It-Iz = Is) to determine whether the current is exceeded (Is <0). Or is there extra current (Is>
0) is calculated. f) In the remote switching signal generator of the controller, when the current is exceeded as a result of calculation by the calculator (Is <0)
Is calculated by dividing the current excess value Is by a predetermined constant K (N =
Is / k) to calculate the number of branch breakers with remote switch capability or the number (N) of remote control relays to be cut, and a plurality of remote switches that are in the closed or input (ON) state at that time. A remote operation relay which cuts the required number N calculated from the previously set one having a lower priority is selected from the branch breakers with function or the remote operation relays to be cut, and the OFF signal for opening or cutting them is transmitted. g) In the remote switching signal generator of the controller,
When there is an excess current as a result of the calculation by the calculation unit (Is>
0) indicates that a plurality of remote switchgear-capable branch breakers or remote control relays that are open or closed at that point are closed or input (ON state) in order from the one with the highest priority. Select a branch breaker with a remote switch function or a remote control relay, and send an ON signal to close or input them. h) When receiving the OFF signal for opening or closing, which is transmitted in step f), the current is interrupted by opening or closing the selected N number of branch switch breakers with function of remote switch or the remote control relay almost simultaneously. Eggplant i) Closing or inputting the selected branch breaker with the remote switch function or the remote operation relay transmitted in the step g) to restore the energized state. A power saving and overload avoidance method including steps a) to i) above.