Methods, programs, and systems for selecting power meters.

Abstract

To provide a selection method for a power measurement device, a program and a selection system for the power measurement device which can easily select an appropriate configuration of the power measurement device.SOLUTION: A selection system for a power measurement device comprises a first information terminal in which a program for making one or more computers execute a power measurement device selection method is installed, and a second information terminal which is connectable through communication with the first information terminal. The power measurement device selection method using a computer (for example, the first information terminal): receives input of information on rated current, voltage and a type of a phase wire system for each of a plurality of breakers installed in a board, on the basis of the information on the board in which the power measurement device is installed (S01); receives the input of instructions for selecting two or more breakers of a measurement object in which power is measured by the power measurement device among the plurality of breakers (S02); and selects a configuration of the power measurement device installed in the board, on the basis of the information and instructions received at a step S01 and a step S02 (S03).SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a method for selecting a power meter, a program, and a power meter selection system.

Background Art

[0002] Conventionally, when introducing a system power meter, it has been difficult to select an appropriate power meter and accessories according to the circuit and environment to be measured, and users may accidentally purchase unnecessary products and accessories. Therefore, a method for easily selecting an appropriate configuration of a power meter has been demanded.

[0003] For example, Patent Document 1 discloses a selection system that can easily select an appropriate product that meets the required specifications for a product composed of drive parts used in an electric moving body with a simple operation.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention provides a method for selecting a power meter and a program that can easily select an appropriate configuration of a power meter.

Means for Solving the Problems

[0006] A method for selecting a power measuring instrument according to one aspect of the present invention is a method for selecting a power measuring instrument using a computer, wherein the computer receives input of information on the rated current, voltage, and phase type of each of a plurality of circuit breakers installed in the panel, based on information on the panel in which the power measuring instrument is installed, receives input of an instruction to select two or more circuit breakers from the plurality of circuit breakers whose power will be measured by the power measuring instrument, and selects the configuration of the power measuring instrument to be installed in the panel based on the information and the instruction.

[0007] A program according to one aspect of the present invention is a program for causing one or more processors to execute the method for selecting the power measuring instrument.

[0008] A power measuring instrument selection system according to one aspect of the present invention comprises an input receiving unit and a selection unit, wherein the input receiving unit receives input of information on the rated current, voltage, and phase type of each of a plurality of circuit breakers installed in the panel based on information on the panel in which the power measuring instrument is installed, receives input of an instruction to select two or more circuit breakers from the plurality of circuit breakers whose power will be measured by the power measuring instrument, and the selection unit selects the configuration of the power measuring instrument to be installed in the panel based on the information and the instruction. [Effects of the Invention]

[0009] The present invention provides a method and program for selecting a power measuring instrument, which allows for easy selection of an appropriate configuration for the power measuring instrument. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a block diagram showing an example of the functional configuration of a power measuring instrument selection system according to an embodiment. [Figure 2] Figure 2 is a flowchart showing an example of the operation of the power meter selection system according to the embodiment. [Figure 3] Figure 3 shows an example of the information on the board. [Figure 4]Figure 4 shows an example of an input screen. [Figure 5] Figure 5 shows an example of a display screen that shows the calculation result of the number of measurement units. [Figure 6] Figure 6 shows an example of a display screen that shows the recalculated number of measurement units. [Figure 7] Figure 7 is a diagram illustrating a heterogeneous system measurement unit. [Figure 8] Figure 8 shows an example of a display screen that shows the selection of current transformer (CT) ratings and the calculation results for the number of units. [Figure 9] Figure 9 shows the type of phase system and voltage of the circuit, and the number of current transformers (CTs) required to measure the current of the circuit. [Figure 10] Figure 10 shows an example of a display screen that shows the selection results for the configuration of a power meter. [Modes for carrying out the invention]

[0011] The embodiments will be described in detail below with reference to the drawings. Note that the embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection configurations of components, steps, and the order of steps shown in the following embodiments are examples only and are not intended to limit the present invention. Furthermore, components in the following embodiments that are not described in an independent claim will be described as optional components.

[0012] Please note that each figure is a schematic diagram and not necessarily a strictly accurate representation. Furthermore, in each figure, substantially identical components are denoted by the same reference numerals, and redundant explanations may be omitted or simplified.

[0013] (Embodiment) [1. Structure] First, the configuration of the power meter selection system in the embodiment will be described. FIG. 1 is a block diagram showing an example of the functional configuration of the power meter selection system in the embodiment.

[0014] The power meter selection system of the present disclosure includes at least an input reception unit that receives an input by a user, and a selection unit that selects the configuration of a power meter installed on a panel. In the power meter selection system, the input reception unit receives, based on information about the panel on which the power meter is installed, input of information on the rated current, voltage, and type of phase line of each of a plurality of breakers installed on the panel, and receives input of an instruction to select two or more measurement target breakers among the plurality of breakers whose power is measured by the power meter. The selection unit selects the configuration of the power meter installed on the panel based on the above information and instruction.

[0015] In the present embodiment, as shown in FIG. 1, the power meter selection system 100 includes, for example, a first information terminal 10 in which a program for causing one or more computers to execute the power meter selection method according to the present embodiment is installed, and a second information terminal 20 that can be connected to the first information terminal 10 via communication. Note that the example in FIG. 1 is merely an example and is not limited thereto. For example, the power meter selection system 100 may not include the second information terminal 20.

[0016] [1-1. First Information Terminal 10] The first information terminal 10 is, for example, an information terminal such as a computer or a tablet terminal used by a user. The user of the first information terminal 10 is, for example, an employee of a company that manufactures and sells power meters. The first information terminal 10 includes, for example, a communication unit 11, an information processing unit 12, a storage unit 13, an input reception unit 14, and a display unit 15.

[0017] [Communication Unit 11] The communication unit 11 is a communication circuit (communication module) for communicating with the second information terminal 20. The communication unit 11 may include a communication circuit (communication module) for communicating via a local communication network, or may include a communication circuit (communication module) for communicating via a wide-area communication network, or may include both of these communication circuits. The communication unit 11 is, for example, a wireless communication circuit that performs wireless communication, but may also be a wired communication circuit that performs wired communication. Note that the communication standard of the communication performed by the communication unit 11 is not particularly limited.

[0018] For example, the communication unit 11 receives information and instructions input by the user of the second information terminal 20 and outputs them to the information processing unit 12. The information may be, for example, information about the panel where the power meter is installed, or may be information about the rated current, voltage, and type of phase wire of each of a plurality of circuit breakers installed on the panel. The instruction is, for example, an instruction to select two or more circuit breakers to be measured for power by the power meter among a plurality of circuit breakers.

[0019] [Information Processing Unit 12] The information processing unit 12 performs various information processes related to the first information terminal 10. More specifically, for example, the information processing unit 12 acquires information and instructions input by the user and performs various information processes related to the selection of the configuration of the power meter installed on the panel. For example, the information processing unit 12 selects the configuration of the power meter installed on the panel based on the information about the panel where the power meter is installed.

[0020] Specifically, the information processing unit 12 includes a calculation unit 12a and a selection unit 12b. The functions of the calculation unit 12a and the selection unit 12b are realized by a processor or microcomputer constituting the information processing unit 12 executing a computer program stored in the storage unit 13.

[0021] The calculation unit 12a calculates the number of measurement units constituting the current measuring instrument based on the type of phase and voltage from the information received as input. More specifically, for example, in calculating the number of measurement units, the calculation unit 12a calculates the number of main units and the number of auxiliary units. Furthermore, for example, if the calculation unit 12a receives an instruction from the input receiving unit 14 to use a heterogeneous system measurement unit having main units capable of measuring the power of multiple breakers with different phase types as the configuration of the power measuring instrument, it decreases the calculated number of main units by one and increases the number of auxiliary units by one. Furthermore, for example, the calculation unit 12a further calculates the number of two or more current transformers (CTs) constituting the power measuring instrument based on the type of phase and voltage from the information received as input.

[0022] The selection unit 12b selects the configuration of the power measuring instrument to be installed in the panel, for example, based on the information and instructions received by the input receiving unit 14. The selection unit 12b selects the ratings of two or more current transformers (CTs) that make up the power measuring instrument, for example, based on the rated current from the information received by the input receiving unit 14. Alternatively, for example, after the configuration of the current measuring instrument has been selected, if the input receiving unit 14 receives an instruction to change the breaker to be measured, the selection unit 12b may change the breaker to be measured according to that instruction.

[0023] [Storage section 13] The memory unit 13 is a storage device that stores control programs and other data executed by the information processing unit 12. The memory unit 13 is implemented by, for example, an HDD (Hard Disk Drive), but may also be implemented by semiconductor memory.

[0024] [Input reception unit 14] The input receiving unit 14 is an input interface that receives operation input from a user using the first information terminal 10. Specifically, the input receiving unit 14 is implemented by a touch panel display or the like. For example, if the input receiving unit 14 is equipped with a touch panel display, the touch panel display functions as both the display unit 15 and the input receiving unit 14. Note that the input receiving unit 14 is not limited to a touch panel display; it may also be a keyboard, a pointing device (e.g., a stylus or mouse), or a hardware button. Furthermore, if the input receiving unit 14 accepts voice input, it may be a microphone.

[0025] [Display section 15] The display unit 15 displays information to be presented to the user. For example, this information is the result of selecting the configuration of the power measuring instrument. The display unit 15 is implemented by a display panel such as a liquid crystal panel or an organic EL (Electro-Luminescence) panel.

[0026] [1-2. Second Information Terminal 20] The second information terminal 20 is an information terminal, such as a computer or tablet, that can be connected to the first information terminal 10 via communication and is used by the user. The user of the second information terminal 20 is, for example, a purchaser of a power meter.

[0027] For example, the second information terminal 20 transmits information and instructions entered by the user to the first information terminal 10. This information may be, for example, information about the panel on which the power meter is installed, or information about the rated current, voltage, and phase type of each of the multiple circuit breakers installed on the panel. The instructions may be, for example, instructions to select two or more circuit breakers from among the multiple circuit breakers whose power will be measured by the power meter. Alternatively, the second information terminal 20 may obtain the selection result of the power meter configuration transmitted from the first information terminal 10 and present it to the user.

[0028] Furthermore, if the first information terminal 10 is, for example, a server device, the second information terminal 20 may be used by an employee of a company that manufactures and sells power measuring instruments, or by a purchaser of a power measuring instrument.

[0029] [2. Operation] Next, the operation of the power meter selection system in the embodiment will be described. Figure 2 is a flowchart showing an example of the operation of the power meter selection system 100 in the embodiment.

[0030] The input receiving unit 14 of the first information terminal 10 receives input information on the rated current, voltage, and phase type of each of the multiple circuit breakers installed in the panel, based on the information of the panel in which the power measuring instrument is installed (S01).

[0031] Next, the input receiving unit 14 receives an input of an instruction to select two or more circuit breakers from among the multiple circuit breakers whose power is measured by the power measuring instrument (S02).

[0032] Next, the selection unit 12b selects the configuration of the power measuring instrument to be installed in the panel based on the information and instructions received by the input receiving unit 14 in steps S01 and S02 (S03).

[0033] Next, the display unit 15 presents the configuration to the user by displaying the configuration of the power measuring instrument selected by the selection unit 12b in step S03 (S04).

[0034] The following will explain each step in more detail with reference to the diagrams. Below, we will describe an example in which a user of the first information terminal 10 (for example, an employee of a power meter manufacturer) obtains the information necessary for selecting a power meter from a user of the second information terminal 20 (for example, a purchaser of a power meter) and selects a power meter to be installed in the control panel.

[0035] For example, a user of the first information terminal 10 obtains data of a panel drawing (also called a panel diagram) or panel information (not shown in Figure 2) of the panel where the power measuring instrument is installed from a user of the second information terminal 20. The obtained panel diagram data or panel information is stored in the storage unit 13. Figure 3 shows an example of panel information. As shown in Figure 3, the panel information includes, for example, the circuit number, phase system, voltage, number of poles of the breaker, the rated current of the breaker, and the name of the load.

[0036] When a user of the first information terminal 10 launches the power meter selection application, the display unit 15 displays an input screen. Figure 4 shows an example of the input screen. For example, when a user of the first information terminal 10 clicks the "Measurement Unit" tab under "Calculate Number of Units," the display unit 15 displays an input screen for entering the information necessary to calculate the number of measurement units. The user may, for example, manually enter the panel information into the cells displayed on the input screen, or they may click the "Load File" button displayed on the input screen to load the panel diagram data into the information processing unit 12, thereby automatically entering the panel information from the panel diagram data. As a result, the input reception unit 14 receives input of the rated current, voltage, and phase type information for each of the multiple breakers (S01).

[0037] Next, when the user of the first information terminal 10 selects two or more circuit breakers to be measured, the input receiving unit 14 receives an instruction to select two or more circuit breakers to be measured (S02). In the example in Figure 4, when the user enters ○ in the cell to be measured, the input receiving unit 14 receives an instruction to select the circuit breaker corresponding to the circuit number in which ○ was entered as the target of measurement. On the other hand, when the user enters × in the cell to be measured, the input receiving unit 14 receives an instruction not to select the circuit breaker corresponding to the circuit number in which × was entered as the target of measurement. Note that the input receiving unit 14 may also be configured to only receive instructions to select circuit breakers to be measured.

[0038] Next, as shown in Figure 4, when the user clicks the "Calculate" button, the input reception unit 14 receives an instruction to calculate the number of measurement units. The calculation unit 12a calculates the number of measurement units according to the instruction. Figure 5 shows an example of a display screen that shows the calculation result of the number of measurement units.

[0039] A power meter consists of at least one measuring unit and two or more current transformers (CTs) for measuring the current of two or more circuit breakers to be measured, and can measure the power of circuits corresponding to multiple circuit breakers. The measuring unit includes a main unit with a communication function for communicating with an external terminal, and an auxiliary unit that does not have a communication function for communicating with an external terminal and is added to the main unit. For example, if the number of circuit breakers to be measured exceeds the number of circuits that can be measured by one measuring unit (so-called main unit), the number of measurable circuits can be increased by adding an expansion unit (so-called auxiliary unit). If the phase-wire type and voltage of multiple circuit breakers to be measured (more specifically, the circuits corresponding to the circuit breakers to be measured) are the same, the power of those circuits can be measured with a single measuring unit.

[0040] For example, if a single measurement unit can measure up to four circuits, as shown in Figure 5, the circuit breakers corresponding to circuits 2 through 8 can be measured by adding two auxiliary units. The circuit breaker corresponding to circuit 1 has the same phase type as the circuit breakers 2 through 8, but the voltage is different, so it is measured by one measurement unit (in this case, the main unit). Also, the circuit breakers corresponding to circuits 9 through 12 have the same phase type and voltage, so they are measured by one measurement unit (in this case, the three-phase three-wire main unit). The main unit has the function of managing the data measured by the main unit and auxiliary units. For example, in the example in Figure 5, the data measured by the single-phase three-wire measurement unit (main unit + two auxiliary units) is output to an external terminal via communication from the single-phase three-wire main unit, and the data measured by the three-phase three-wire measurement unit is output to an external terminal via communication from the three-phase three-wire main unit. Note that the maximum number of circuits that can be measured by a single measurement unit is not limited to the above example and may be set appropriately according to the design.

[0041] Figure 6 shows an example of a display screen showing the recalculated number of measurement units. For example, if the panel information entered in step S02 of Figure 3 includes the phase diagrams of different single-phase and three-phase systems, the user can choose whether or not to use a measurement unit capable of measuring different systems (a so-called different-system measurement unit). A measurement unit capable of measuring different systems can measure both single-phase and three-phase circuits with a single measurement unit.

[0042] For example, if a different-system measurement unit is not used, the user clicks the "Confirm" button to finalize the calculation result of the number of measurement units. If a different-system measurement unit is used, for example, the user clicks the "Change" button to change the calculation result. When the input reception unit 14 receives an instruction to change the calculation result, the display unit 15 displays a selection tool that allows the user to choose whether or not to use a different-system measurement unit. When the user clicks "Yes" on the selection tool, the input reception unit 14 accepts the input of an instruction to use the different-system measurement unit as part of the power measuring instrument configuration. The calculation unit 12a recalculates the number of measurement units, decreases the calculated number of main units by one, and increases the number of auxiliary units by one. At this time, the display unit 15 may display the recalculation result.

[0043] Here, we will explain the cases in which heterogeneous system measurement units are used and those in which they are not. Figure 7 is a diagram illustrating heterogeneous system measurement units. Figure 7(a) shows an example in which heterogeneous system measurement units are installed in one panel, and Figure 7(b) shows an example in which single-phase and three-phase measurement units are installed in separate panels. A lighting panel is a panel that measures the power of a single-phase circuit, and a power panel is a panel that measures the power of a three-phase circuit.

[0044] For example, as shown in Figure 7(a), if the distance between the lighting panel and the power panel is relatively short (e.g., within 1 meter), an auxiliary unit for three-phase three-wire systems may be placed in the power panel and the voltage and CT lines may be routed to the lighting panel. Alternatively, an auxiliary unit for three-phase three-wire systems may be placed in the lighting panel and the auxiliary unit for three-phase three-wire systems may be connected to a main unit for single-phase three-wire systems. This is called a heterogeneous system measurement unit. A heterogeneous system measurement unit has a main unit capable of measuring the power of circuits corresponding to multiple breakers with different phase-wire types. By using a heterogeneous system measurement unit, both single-phase and three-phase circuits can be measured with a single measurement unit, and furthermore, the main unit for single-phase three-wire systems can manage the measurement data and output the measurement data to an external terminal. In addition, since only one main unit is required, it is more cost-effective than using two main units.

[0045] Furthermore, as shown in Figure 7(b), if the distance between the lighting panel and the power panel is relatively large (for example, several meters or more), the main unit for single-phase three-wire systems is placed in the lighting panel, and the main unit for three-phase three-wire systems is placed in the power panel. By placing the main units separately in the lighting panel and the power panel in this way, the measurement lines (voltage lines and CT lines) do not need to cross between these panels, making it easier to install the power measuring instrument.

[0046] Figure 8 shows an example of a display screen that shows the selection of current transformer (CT) ratings and the calculation of the number of CTs. In selecting the CT ratings, the selection unit 12b selects a CT with the smallest rating among multiple ratings (specifically, CT ratings) that are equal to or greater than the breaker's rated current.

[0047] For example, as shown in Figure 8, when a user of the first information terminal 10 clicks the "CT" tab under "Selection / Quantity," the display unit 15 displays a screen for selecting the rating (more specifically, the rated current) of the CTs and calculating the number of CTs. Next, when a user of the first information terminal 10 clicks the "Calculate" button, the input reception unit 14 receives instructions for selecting the rating of the CTs and calculating the number of CTs. Next, the selection unit 12b selects the rating of the CTs for current measurement based on the breaker rated current of each circuit. For example, if the breaker rated current is 30A and 50A, the CT rating is 50A, and the CT standard (e.g., product number) is CT50A. Also, for example, if the breaker rated current is 100A, the CT rating is 100A, and the CT standard (product number) is CT100A. Also, for example, if the breaker rated current is 225A, the CT rating is 250A, and the CT standard (product number) is CT250A.

[0048] Figure 9 shows the type of phase and voltage of a circuit and the number of current transformers (CTs) required to measure the current of that circuit. The calculation unit 12a calculates the number of CTs required to measure the current of each circuit based on the type of phase and voltage of each circuit (see Figure 9). As shown in Figure 9, if the circuit to be measured is single-phase two-wire or single-phase three-wire with one voltage (e.g., 100V or 200V), one CT is required to measure the current of that circuit. If the circuit to be measured is single-phase three-wire with two voltages (100V and 200V), two CTs are required to measure the current of that circuit. If the circuit to be measured is three-phase three-wire, two CTs are required to measure the current of that circuit.

[0049] Next, the display unit 15 displays the ratings of the selected CTs and the number of CTs for each rating.

[0050] Figure 10 shows an example of a display screen showing the selection results for the configuration of a power meter. When the user of the first information terminal 10 clicks the "Power Meter Configuration" tab under "Result Output," the display unit 15 displays the selection results for the configuration of the power meter. At this time, if a different type of power system measurement unit is used, this may also be indicated.

[0051] When the user of the first information terminal 10 clicks the "Print" button, the selection results are printed. Alternatively, when the user of the first information terminal 10 clicks the "Save" button, the selection results data is saved. The first information terminal 10 may also send the selection results data to the second information terminal 20.

[0052] [3. Effects, etc.] As described above, the power measuring instrument selection method according to the embodiment is a power measuring instrument selection method using a computer (for example, the first information terminal 10), wherein the computer receives input information on the rated current, voltage, and phase type of each of the multiple circuit breakers installed in the panel based on the information of the panel in which the power measuring instrument will be installed (S01), receives input instructions to select two or more circuit breakers from the multiple circuit breakers whose power will be measured by the power measuring instrument (S02), and selects the configuration of the power measuring instrument to be installed in the panel based on the information and instructions received in steps S01 and S02 (S03).

[0053] This method of selecting power meters allows for easy selection of the appropriate configuration of power meters to be installed in the control panel, based on the information provided in the panel and the selection instructions for the circuit breaker to be measured.

[0054] For example, in the power measuring instrument selection method according to the embodiment, the computer (for example, the first information terminal 10) calculates the number of measuring units constituting the power measuring instrument based on the type of phase system and voltage from the information received as input.

[0055] This method of selecting power meters allows for the appropriate calculation of the number of measurement units based on the phase type and voltage of each of the multiple circuit breakers installed in the panel. Therefore, this method of selecting power meters can reduce the chances of unnecessary measurement units being mistakenly purchased.

[0056] For example, in the power measuring instrument selection method according to the embodiment, the power measuring instrument consists of at least one measuring unit and two or more current transformers for measuring the current of two or more breakers to be measured, and a computer (e.g., first information terminal 10) selects the ratings of each of the two or more current transformers constituting the power measuring instrument based on the rated current from the information received as input.

[0057] This method of selecting power meters allows for the selection of appropriate ratings for each of the two or more current transformers (CTs) that make up the power meter, based on the rated current of each of the multiple circuit breakers installed in the panel. Therefore, this method of selecting power meters can reduce the chances of unnecessary CTs being mistakenly purchased.

[0058] For example, in the power measuring instrument selection method according to the embodiment, the computer (e.g., the first information terminal 10) further calculates the number of two or more current transformers based on the type of phase system and voltage from the information received as input.

[0059] This method of selecting power meters allows for the selection of appropriate ratings for each of the two or more current transformers (CTs) that make up the power meter, based on the phase and voltage of each of the multiple circuit breakers installed in the panel. Therefore, this method of selecting power meters can reduce the chances of unnecessary CTs being mistakenly purchased.

[0060] For example, in the power meter selection method according to the embodiment, after the configuration of the power meter has been selected, the computer (for example, the first information terminal 10) receives an input of an instruction to change the selected breaker to be measured, and changes the breaker to be measured according to the instruction.

[0061] This method of selecting power meters allows for the selection of an appropriate configuration based on the changed information, even after the configuration of the power meter has been selected, by changing the circuit breaker being measured.

[0062] For example, in the power measuring instrument selection method according to the embodiment, the measuring unit includes a main unit having a communication function for communicating with an external terminal, and an auxiliary unit that does not have a communication function for communicating with an external terminal and is added to the main unit, and the computer (for example, the first information terminal 10) calculates the number of main units and the number of auxiliary units in calculating the number of measuring units.

[0063] This method of selecting power meters allows for the appropriate calculation of the number of main units and auxiliary units based on the phase type and voltage of each of the multiple circuit breakers installed in the panel. Therefore, this method of selecting power meters can reduce the chances of purchasing unnecessary measurement units by mistake.

[0064] For example, in the power measuring instrument selection method according to the embodiment, when the computer (for example, the first information terminal 10) receives an input instruction to use a heterogeneous system measurement unit having a main unit capable of measuring the power of multiple breakers with different phase-wire types as the configuration of the power measuring instrument, it reduces the calculated number of main units by one and increases the number of accessory units by one.

[0065] This method of selecting power meters allows users to choose whether or not to use different-system measurement units depending on the installation configuration of the panels at the site (e.g., the distance between the lighting panel and the power panel). Therefore, this method of selecting power meters allows users to easily select the appropriate configuration of power meters according to their requirements.

[0066] Furthermore, the program according to the embodiment is a program that causes one or more processors to execute one of the above methods for selecting a power measuring instrument.

[0067] By running such a program on one or more processors, it is possible to easily select the appropriate configuration of power measuring instruments installed in the panel based on the panel information and the selection instructions for the circuit breaker to be measured.

[0068] Furthermore, the power measuring instrument selection system 100 according to the embodiment comprises an input receiving unit 14 and a selection unit 12b. The input receiving unit 14 receives input information on the rated current, voltage, and phase type of each of the multiple circuit breakers installed in the panel based on information on the panel in which the power measuring instrument is installed, and receives input instructions to select two or more circuit breakers from the multiple circuit breakers whose power will be measured by the power measuring instrument. The selection unit 12b selects the configuration of the power measuring instrument to be installed in the panel based on the information and instructions received by the input receiving unit 14.

[0069] Such a power meter selection system 100 can easily select the appropriate configuration of power meters to be installed in a panel based on the panel information and the selection instructions for the circuit breaker to be measured.

[0070] (Other embodiments) Although embodiments have been described above, the present invention is not limited to the embodiments described above.

[0071] Furthermore, although the power meter selection system in the above embodiment was implemented by multiple devices, it may also be implemented by a single device. When the power meter selection system is implemented by multiple devices, the components of the system may be distributed among the multiple devices in any way.

[0072] Furthermore, the method of communication between devices in the above embodiment is not particularly limited. In addition, a relay device (not shown) may be involved in the communication between devices.

[0073] Furthermore, in the above embodiment, the processing performed by a specific processing unit may be performed by another processing unit. Also, the order of multiple processing units may be changed, or multiple processing units may be executed in parallel.

[0074] Furthermore, in the above embodiment, each component may be realized by executing a software program suitable for each component. Each component may also be realized by a program execution unit such as a CPU or processor reading and executing a software program recorded on a recording medium such as a hard disk or semiconductor memory.

[0075] Furthermore, each component may be implemented by hardware. For example, each component may be a circuit (or integrated circuit). These circuits may form a single circuit as a whole, or they may be separate circuits. Also, each of these circuits may be a general-purpose circuit or a dedicated circuit.

[0076] Furthermore, general or specific embodiments of the present invention may be implemented as a system, apparatus, method, integrated circuit, computer program, or recording medium such as a computer-readable CD-ROM. Alternatively, they may be implemented as any combination of a system, apparatus, method, integrated circuit, computer program, and recording medium.

[0077] For example, the present invention may be implemented as a computer or a power meter selection system equivalent to the above embodiment. Alternatively, the present invention may be implemented as a method for selecting a power meter executed by a computer, such as a power meter selection system, or as a program for causing a computer to execute such a power meter selection method. The present invention may also be implemented as a computer-readable, non-temporary recording medium on which such a program is recorded.

[0078] Furthermore, the present invention also includes forms obtained by applying various modifications to each embodiment that a person skilled in the art could conceive, or forms realized by arbitrarily combining the components and functions of each embodiment without departing from the spirit of the present invention. [Explanation of symbols]

[0079] 10. First Information Terminal 12a Calculation part 12b Selection section 14 Input Reception Section 100 Power Measuring Instrument Selection System

Claims

1. A method for selecting power measuring instruments using a computer, The aforementioned computer, Based on the first information, which is information about the panel on which the power measuring instrument is installed, the system receives input of the second information, which is information about the rated current, voltage, and phase type of each of the multiple circuit breakers installed in the panel. The system receives an input to select two or more circuit breakers from the aforementioned plurality of circuit breakers whose power is measured by the power measuring instrument. Based on the second information and the instructions, the configuration of the power measuring instrument to be installed in the panel is selected. Methods for selecting power measuring instruments.

2. The aforementioned computer, Based on the type of phase and voltage from the second information received as input, the number of measurement units constituting the power measuring instrument is calculated. A method for selecting a power measuring instrument according to claim 1.

3. The power measuring instrument comprises at least one measuring unit and two or more current transformers for measuring the current of two or more breakers to be measured. The aforementioned computer, Based on the rated current from the second information received as input, the ratings of each of the two or more current transformers constituting the power measuring instrument are selected. A method for selecting a power measuring instrument according to claim 2.

4. The aforementioned computer, Furthermore, based on the type of phase and voltage among the second information received as input, the number of the two or more current transformers is calculated. A method for selecting a power measuring instrument according to claim 3.

5. The aforementioned computer, After the configuration of the power measuring instrument has been selected, if an instruction is received to change the selected breaker to be measured, the breaker to be measured is changed according to the instruction. A method for selecting a power measuring instrument according to claim 1.

6. The measurement unit includes a main unit having a communication function for communicating with an external terminal, and an auxiliary unit that does not have a communication function for communicating with the external terminal and is added to the main unit. The computer calculates the number of main units and the number of accessory units in calculating the number of measurement units. A method for selecting a power measuring instrument according to claim 2.

7. The aforementioned computer, Furthermore, when an instruction is received to use a heterogeneous system measurement unit, which has a main unit capable of measuring the power of multiple breakers with different phase-wire types, as the configuration of the power measuring instrument, the calculated number of main units is reduced by one, and the number of accessory units is increased by one. A method for selecting a power measuring instrument according to claim 6.

8. To cause one or more processors to execute the power measuring instrument selection method described in any one of claims 1 to 6. program.

9. It comprises an input reception unit and a selection unit. The aforementioned input receiving unit is Based on the first information, which is information about the panel on which the power measuring instrument is installed, the system receives input of the second information, which is information about the rated current, voltage, and phase type of each of the multiple circuit breakers installed in the panel. The system receives an input to select two or more circuit breakers from the aforementioned plurality of circuit breakers whose power is measured by the power measuring instrument. The selection unit selects the configuration of the power measuring instrument to be installed in the panel based on the second information and the instructions. A system for selecting power measuring instruments.

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