KR200253995Y1 - Apparatus for displaying electric power information using wattmeter - Google Patents

Abstract

The present invention provides a power information display device using a power meter to easily check the power consumption and additional information from the power supply provider measured by the power meter using the power line communication through a separate power information display terminal. .

To this end, the present invention is a power measurement device having an electronic wattmeter connected to a power supply operator through a power line to measure the amount of power consumed at a consumer, and is connected to the electronic wattmeter for serial communication and measured from the electronic wattmeter. It is possible to check the data of the power consumption received from the power line modem and the power line modem for transmitting the data of the used power consumption to the power supply provider indoors by power line communication, and to the power supply company via the power line. Characterized in that the power information display means for displaying.

Description

Apparatus for displaying electric power information using wattmeter}

The present invention relates to a power information display device using a wattmeter, and more particularly, using a wattmeter to visually check power usage information provided from a wattmeter and additional information provided by a power supply company through separate display means. A power information display apparatus.

As is well known, the electric power provided to the general electric power customer is measured by the electric power usage installed on each customer's power meter, and the measured power consumption can be numerically displayed. Electronic meters that can display power usage by a mechanical inductive meter or liquid crystal display (LCD) are mainly used.

However, such a mechanical inductive meter is able to display the total cumulative power consumption, and not only does the user of the electric power of the customer not be able to accurately check the monthly power usage, but also most of the meter Since it is installed in a remote corner or outside of a living space, there is an inconvenience to check the power consumption by moving to a location where the meter is installed in order to check the power consumption.

In addition, even in the case of an electronic meter equipped with a liquid crystal display device, the total power consumption can be displayed in a cumulative manner. Not only is it difficult to check the power usage, but also it is impossible to check the desired data on the power usage by arbitrary operation of the power user.

On the other hand, recently, a trend of developing and applying a power meter remote meter reading system for receiving and reading data about the power consumption of each electric power meter measured electronically through an electronic electricity meter remotely using a predetermined communication method is applied. In this case, in the case of the remote meter reading system of the amount of electricity, the meter reading staff of the electricity supplier does not need to visit each customer to read the current amount of electricity displayed on the electricity meter.

However, in the case of the remote meter reading system of the amount of power, it is still difficult for the power user to check the power usage on a monthly basis, because it is possible to accumulate and measure the amount of power used by each of the power consumers as a whole, (A) In order to improve the service, it is necessary to inform the power users of various kinds of additional information such as preliminary information such as a power outage plan, guide information on power management, or guide information on power rates, The disadvantage is that it is difficult to transmit information.

In addition, in recent years, due to the application of the progressive charge rate system for over-use of power, the power user needs to check the power consumption of the corresponding power customer more closely. Since no alarm function is provided to notify the overuse state of the device, there is a problem that it acts as a main factor in neglecting inefficient power use.

Moreover, the establishment of a competitive system in the electric power business necessitates the provision of various additional information related to electric power supply, reflecting the trend of privatization of electric power supply companies and the distribution of electric power distribution and sales operators exponentially. Conventional electronic meters and remote metering systems have the problem of not being able to meet such requirements.

Accordingly, the present invention has been made in view of the above-described conventional situation, and an object thereof is to provide a power consumption of electric power measured by a power meter and additional information from a power supply operator through a separate power information display terminal using power line communication. It is an object of the present invention to provide a power information display apparatus using a wattmeter.

Another object of the present invention is to display the power information using the electricity meter to easily check the power consumption and electricity bill information and additional information provided by the electricity supplier by the serial communication between the electricity meter and the separate display terminal To provide a device.

Another object of the present invention is to use the electricity meter and the power information using the electricity meter to easily check the power consumption and electricity price information and additional information provided by the electricity supplier by using the wireless communication between the separate display terminal It is to provide a display device.

Still another object of the present invention is to provide a power information display apparatus using a watt-hour meter that can warn the excessive use of power through a separate display terminal when power usage exceeding a predetermined reference power amount is measured from the watt-hour meter. .

1 is a view showing the configuration of a power information display device through power book communication according to an embodiment of the present invention,

2 is a view showing in detail the configuration of the power information display means shown in FIG.

3 is a view showing an example in which the power information display means is installed in accordance with a preferred embodiment of the present invention,

4 is a flowchart illustrating an operation of a power information display apparatus using a power meter according to an embodiment of the present invention;

5 is a view showing the configuration of a power information display apparatus through serial communication according to another embodiment of the present invention;

6 is a view showing in detail the configuration of the power information display means shown in FIG.

7 is a view showing the configuration of a power information display device through wireless communication according to another embodiment of the present invention;

8 is a block diagram showing the detailed configuration of the power information display means shown in FIG.

<Description of the symbols for the main parts of the drawings>

2,30,60: electricity supplier, 4,32,62: electronic electricity meter,

6: power line modem, 8, 34, 66: blocking means,

10: power outlet, 12, 36, 68: power information display means,

14: high pass filter, 16: PLC modem,

18, 42, 74: key input, 20, 44, 76: microcontroller,

22, 46, 78: display unit, 24, 48, 80: relay output unit,

26, 50, 82: alarm generator.

According to an embodiment of the present invention to achieve the above object, in the power meter measuring device having an electronic wattmeter connected to the power supply operator through the power line to measure the power consumption consumed by the customer, serial communication with the electronic wattmeter is possible A power line modem which transmits data of the power consumption measured from the electronic electricity meter indoors by power line communication, and transmits the power consumption data to the power supply provider via a power line, and received from the power line modem indoors of a power consumer. Provided is a power information display apparatus using a power meter composed of power information display means for displaying the data of the received power usage.

According to another example of the present invention in order to achieve the above another object, in the power meter measuring device having an electronic wattmeter connected to the power supply operator through the power line to measure the power consumption consumed by the customer, Provided is a power information display apparatus using a power meter connected to the electronic electricity meter so as to enable serial communication, the power information display means configured to display data of power consumption measured from the electronic electricity meter so as to be identified.

Hereinafter, an embodiment of the present invention configured as described above will be described in detail with reference to the accompanying drawings.

That is, FIG. 1 is a view showing the configuration of a power information display apparatus using a power meter according to an embodiment of the present invention.

As shown in FIG. 1, the power information display device according to an embodiment of the present invention is connected to a power supply operator 2 through a power line and an electronic electricity meter 4 having a power line modem 6, and shuts off. Means 8, a power outlet 10, and power information display means 12;

In the figure, the electronic electricity meter 4 is to measure the amount of power supplied from the power supplier 2 to the power consumer side and to generate it as electronic power usage data.

The power line modem 6 is embedded in the electronic wattmeter 4, receives data of power consumption measured by the electronic wattmeter 4, and receives the power supply operator 2 through the electronic wattmeter 4. Receives and demodulates a variety of customer information included in the power signal supplied from the electronic signal, and modulates the information of the amount of power measured from the electronic wattmeter 4 to provide the power supply service provider 2 as a power line communication signal. do.

In addition, the shut-off means 8 is installed indoors of the corresponding power consumer, to prevent a short-circuit situation or an overheating situation caused by an unstable state of, for example, an AC 220V power signal supplied from the power supply company 2. In order to cut off in advance, an electric leakage circuit breaker 8a which cuts off power supplied indoors and an electric current which cuts off power by detecting an overcurrent generated for loads of various electric appliances when detecting an electric leakage state of the power signal It is comprised including the breaker 8b.

In addition, the power information display means 12 is connected to a power outlet 10 branched from a power line connected to the blocking means 8, and transmits a power line communication signal from the power line modem 6 to the power outlet 10; It is to visually display the data of the power usage received through the power line communication signal and the various customer information provided from the power supply provider, which is based on the user's selective input operation. In addition, it is possible to display by dividing the unit into monthly, quarterly unit, and to convert each electric power consumption into electric charge by applying a preset charge calculation algorithm.

Here, when the power information display means 12 sets a predetermined target power value according to a user's selective input operation, when the power consumption measured by the electronic wattmeter 4 exceeds the target power value. It is intended to alert the user to an overuse state of power.

Meanwhile, as shown in FIG. 2, the power information display means 12 includes a high pass filter 14 and a PLC modem 16, a key input unit 18, a microcontroller 20, a display unit 22, The relay output part 24, the alarm generating part 26, and the speaker 28 are comprised.

In FIG. 2, the high pass filter 14 filters only the high frequency components from the power line signal inputted from the power line modem 6 through the power line, and the PLC modem 16 transmits each transmission / reception by a protocol for power line communication. The received signal is modulated / demodulated.

The key input unit 18 has a unit selection input for checking power usage on a daily, monthly and quarterly basis, and a plurality of function keys for function input for setting a target power value of the power usage.

The microcontroller 20 stores data on the amount of power used by the electronic electricity meter 4 received through the PLC modem 16 in internal memory means (not shown), and stores the data of the stored amount of used power. According to the user's operation of the key input unit 18, display and control can be performed on a daily basis, monthly basis, and quarterly basis, and the target power value and the used power amount set by the key input unit 18 are, for example, Compared by the same predetermined unit of time, the alarm is used to control the excess state of the power consumption.

In addition, the microcontroller 20 performs display control for displaying on the display unit 22 customer information received from the power supply company 2 received through the PLC modem 16.

Here, the microcontroller 20 may store and store the power usage received from the electronic watt-hour meter 4 in an internal memory means at regular intervals such as, for example, 12 months, and the power usage measured in units of a predetermined period is While controlling to be displayed converted into an electric charge, on the basis of the data of the amount of power accumulated in the internal memory means according to the user setting through the key input unit 18, as well as the total cumulative power of the current month, as well as the previous month It is also possible to check the total cumulative power amount of and to check the amount of power used for a certain period of time set by the user.

In the figure, the display unit 22 selectively displays the electric power consumption measured by the electronic watt-hour meter 4 on a daily basis, monthly basis or quarterly basis according to the display control of the microcontroller 20, It is for performing a display for alarming a state exceeding a target power amount set by the key input unit 18, and is made of a thin display element such as an LCD.

The relay output unit 24 controls the relay contact point when the power usage amount measured by the electronic wattmeter 4 under the control of the microcontroller 20 exceeds a preset target power amount within a predetermined period such as, for example, monthly unit. This connection generates an on / off control signal for automatically turning on / off a specific external load device (such as an air conditioner).

The alarm generator 26 generates a voice alarm signal for alarming a state in which the power consumption exceeds a target power value according to the alarm control of the microcontroller 20 and outputs a voice through the speaker 28. .

Here, it is preferable that the alarm generator 26 can generate a voice alarm sound of a different tone (that is, a different melody sound) in stages according to a state in which the power consumption of the corresponding customer exceeds the target power value.

On the other hand, the power information display means 12, as shown in Figure 3, the power plug 12a is integrally arranged to be connected to the power line modem unit on the rear side of the outlet terminal of the power outlet 10 ( When the power plug 12a is inserted into the outlet terminal 10a, the main body of the power information display means 12 is fixedly disposed on the indoor power outlet 10. As it becomes a form, it is possible for the power user to check the power usage from time to time.

In addition, the power information display means 12 withdraws the power plug from the main body of the power information display means 12 through a power cable so that it can be inserted into the outlet terminal 10a of the power outlet 10. For example, the main body of the electric power information display means 12 can be fixedly arranged on the wall surface of the indoor power desired by the electric power user through a separate fixing means.

Next, the operation of the present invention made as described above will be described in detail with reference to the flowchart of FIG. 4.

First, the microcontroller 20 is information on the power consumption of the corresponding power consumer measured by the electronic watt-hour meter 4 in the state in which the meter reading date of the power consumption is input by a user operation of the key input unit 18 (step S10). Is received by the power line modem unit consisting of the high pass filter 14 and the power line communication circuit unit 16 by power line communication through the power line modem 6, and the information of the amount of power is stored in the internal memory cumulatively ( Step S11).

In this state, the microcontroller 20 converts the power consumption measured and accumulated in the electronic power meter 4 into power rates according to a preset fee calculation algorithm (step S12).

Next, the microcontroller 20 determines whether or not the accumulated power consumption exceeds the target power preset by the key input unit 18 (step S13).

As a result of the determination, when it is determined that the amount of power measured and accumulated by the electronic watt-hour meter 4 exceeds a target power, the microcontroller 20 controls the alarm generator 26 to control the alarm through the speaker 28. The alarm sound indicating that the amount of power used is exceeded, so that the voice is outputted, so that the alarm tone of the different tones is differentially generated in the alarm generator 26 according to the degree of the power consumption exceeding the target power. (Step S14).

Next, when the microcontroller 20 determines whether the meter reading date input in the step S10 has passed and judges that the meter reading date has passed (YES in step S15), the microcontroller 20 and the power line communication circuit unit 16 are high. Through the pass filter 14, the meter reading information is transmitted to the power line modem 6 as a result of the meter reading, and the meter reading information is transmitted to the power supply provider by remote communication between the power line modem 6 and the power supply provider. Is transmitted (step S16).

Next, another embodiment of the present invention will be described in detail with reference to the accompanying drawings.

That is, FIG. 5 is a diagram illustrating a configuration of a power information display apparatus using a power meter according to another embodiment of the present invention.

As shown in FIG. 5, the power information display device according to another embodiment of the present invention is connected to a power supply provider 30 through a conventional wired information communication network such as an internet communication network, and has a serial communication unit 33. An electronic electricity meter 32, a shutoff means 34, and a power information display means 36 are provided.

In the figure, the electronic electricity meter 32 measures the amount of power supplied from the power supply provider 30 to the power consumer, generates it as electronic power consumption data, and measures the power consumption measurement information. Remote meter reading is to be transmitted to the power supply provider 30 side.

Here, the electronic electricity meter 32 is connected to the power information display means 36 through a serial cable of the serial communication unit 33, such as RS-232C or RS-485, the power of the power customer Usage information is transmitted to the power information display means 36 via serial communication.

The shut-off means 34 is installed indoors of the corresponding power consumer, and it is possible to prevent leakage or overheating caused by an unstable state of, for example, an AC 220V power signal supplied from the power supply company 30. In order to cut off, when detecting a short-circuit state of the power signal, a circuit breaker (34a) to cut off the power supplied indoors, and a thermal breaker to cut off the power by detecting the over-current generated to the load of various heating equipment ( 34b).

In addition, the power information display means 36 receives the data of the power consumption measured from the electronic electricity meter 32 through serial communication with the electronic electricity meter 32, the power supply through the electronic electricity meter 32 Various customer information included in the power signal supplied from the operator 30 is received and displayed visually.

In addition, the power information display means 36 can display the power consumption divided into daily unit, monthly unit, quarterly unit according to a user's selective input operation, and each power consumption is set in advance for a charge calculation algorithm. By applying this, it can be displayed in terms of electric charge.

Here, when the power information display means 36 sets a predetermined target power value according to a user's selective input operation, the power consumption measured by the electronic wattmeter 32 exceeds the target power value. It is intended to alert the user to an overuse state of power.

Meanwhile, as shown in FIG. 6, the power information display means 36 includes a communication port 38, a serial communication unit 40, a key input unit 42, a microcontroller 44, a display unit 46, and a relay. The output part 48, the alarm generating part 50, and the speaker 52 are comprised.

The communication port 38 is connected to the electronic wattmeter 32 via a serial cable of a serial communication method, and the serial communication unit 40 is connected to the electronic wattmeter 32 according to a protocol for serial communication. Data processing for exchanging power usage data and various customer information is performed.

The key input unit 42 includes a unit selection input for checking power usage on a daily, monthly and quarterly basis, and a plurality of function keys for inputting a function for setting a target power value of the power usage.

The microcontroller 44 stores data on power usage from the electronic electricity meter 32 received through the serial communication unit 40 in an internal memory means (not shown), and stores the data of the stored power usage. According to the user's operation of the key input unit 42, display control can be performed on a daily basis, monthly basis, and quarterly basis, and the target power value and the used power amount set by the key input unit 42 are, for example, Compared by the same predetermined unit of time, the alarm is used to control the excess state of the power consumption.

In addition, the microcontroller 44 performs display control for displaying on the display unit 46 customer information received from the power supplier 30 received through the electronic electricity meter 32.

In the same figure, the display unit 46 selectively displays the electric power consumption measured by the electronic watt-hour meter 32 on a daily basis, monthly basis, or quarterly basis according to the display control of the microcontroller 44, It is for performing a display for alarming a state exceeding a target power amount set by the key input unit 42, and is made of a thin display element such as an LCD.

The relay output unit 48 controls the relay contact point when the power consumption measured by the electronic wattmeter 32 under the control of the microcontroller 44 exceeds a preset target power amount within a predetermined period such as, for example, monthly unit. This connection generates an on / off control signal for automatically turning on / off a specific external load device.

The alarm generator 50 generates a voice alarm signal for alarming a state in which the power consumption exceeds a target power value according to the alarm control of the microcontroller 44 and outputs a voice through the speaker 52. .

In another embodiment of the present invention made as described above through the corresponding electronic power meter 32 through the power information display means 36 connected to the electronic power meter 32 and serial communication without installing a separate power line modem The measured indoor power usage is displayed, and the power usage can be visually and audibly alerted when the power usage exceeds a specific target power value.

Next, another embodiment of the present invention will be described in detail with reference to the accompanying drawings.

That is, FIG. 7 is a diagram illustrating a configuration of a power information display device through wireless communication according to another embodiment of the present invention.

As shown in FIG. 7, the power information display device according to another embodiment of the present invention is connected to a power supply company 60 through a conventional wired information communication network such as an internet communication network, and has a wireless communication unit 64. The electronic power meter 62, the blocking means 66, and the power information display means 68 are constituted.

In the figure, the electronic electricity meter 62 measures the amount of power supplied from the power supplier 60 to the power consumer, generates it as electronic power usage data, and measures the power usage measurement information. Remote meter reading is to be transmitted to the power supply provider 60 side.

The electronic electricity meter 62 is configured such that the wireless communication unit 64 can exchange information through the same wireless communication frequency band as the power information display means 68, thereby wirelessly communicating the power consumption measurement information of the corresponding power consumer. Through the power information display means 68 is transmitted.

The shut-off means 66 is installed indoors of the corresponding power consumer, and it is possible to prevent leakage or overheating caused by an unstable state of, for example, an AC 220V power signal supplied from the power supply company 60. In order to cut off, when detecting a short-circuit state of the power signal, an earth leakage breaker (66a) to cut off the power supplied to the indoor, and an electric heat breaker that cuts off the power by detecting the over-current generated to the load of the various heating equipment ( 66b).

In addition, the power information display means 68 receives the data of the power consumption measured from the electronic electricity meter 62 through wireless communication with the electronic electricity meter 62, the power supply through the electronic electricity meter 62 Various customer information included in the power signal supplied from the operator 60 is received and displayed visually.

In addition, the power information display means 68 can display the power consumption divided into daily, monthly and quarterly units according to a user's selective input operation, and each power consumption is set in advance by a charge calculation algorithm. By applying this, it can be displayed in terms of electric charge.

Here, when the power information display means 68 sets a predetermined target power value according to a user's selective input operation, when the power consumption measured by the electronic wattmeter 62 exceeds the target power value. It is intended to alert the user to an overuse state of power.

As shown in FIG. 8, the power information display unit 68 includes a wireless transceiver 70, a modulator 72, a key input unit 74, a microcontroller 76, a display unit 78, and a relay output. A unit 80, an alarm generating unit 82, and a speaker 84.

The wireless transmission / reception unit 70 receives a wireless information signal of power usage and customer information transmitted from the wireless communication unit 64 of the electronic electricity meter 62, and wirelessly transmits an information signal from the microcontroller 76. Will be sent.

The demodulation unit 72 demodulates a radio information signal for the modulated power usage and customer information received through the radio transceiver 70, and wirelessly transmits the information signal from the microcontroller 76. Modulated and transmitable.

The key input unit 74 includes a unit selection input for checking power usage on a daily basis, monthly basis, and quarterly basis, and a plurality of function keys for inputting a function for setting a target power value of the power consumption.

The micro-controller 76 stores data on power usage from the electronic electricity meter 62 received through the wireless transceiver 70 and the demodulator 72 in internal memory means (not shown). The stored power consumption data is displayed and controlled to be checked on a daily basis, monthly basis, and quarterly basis according to a user's operation of the key input unit 74, and the target power value and the amount of power set by the key input unit 74 are checked. The value of is compared by a predetermined period such as a month, for example, to control the excess state of power usage.

In addition, the micro-controller 76 performs display control for displaying the customer information from the power supplier 60 received through the electronic electricity meter 62 on the display unit 78.

The display unit 78 selectively displays the electric power consumption measured by the electronic electricity meter 62 on a daily basis, monthly basis, or quarterly basis according to the display control of the microcontroller 76, and the amount of power used is the key input unit ( It is for performing a display for alarming a state exceeding a target power amount set by 74), and is made of a thin display element such as an LCD.

The relay output unit 80 controls the relay contact point when the power consumption measured by the electronic wattmeter 62 under the control of the microcontroller 76 exceeds a predetermined target power amount within a predetermined period such as, for example, monthly unit. The connection generates an on / off control signal for automatically turning on / off a specific external load device.

The alarm generator 82 generates a voice alarm signal for alarming a state where the power consumption exceeds a target power value according to the alarm control of the microcontroller 76 and outputs a voice through the speaker 84. .

The present invention having the above-described embodiments can be modified and implemented without departing from the technical gist of the invention without departing from the embodiments.

As described above, according to the present invention, the information on the indoor power consumption measured by the electronic electricity meter can be visually and audibly confirmed by power line communication, serial communication, or wireless communication with a separate power information display means. By generating an alarm to easily determine whether the power usage exceeds a predetermined target power, the power user of each consumer can easily grasp the indoor power usage.

In addition, the meter reading staff of the electricity supplier can easily grasp the power consumption of each consumer without visiting the customer, and the electricity supplier can quickly and accurately convey the customer information to be notified to each consumer. Will have an effect.

Claims (13)

In the power measurement device having an electronic electricity meter connected to the power supply operator via a power line to measure the amount of power consumed at the consumer, A power line modem which transmits data of power consumption measured from the electronic electricity meter indoors by power line communication, and also transmits data to the power supply company via a power line; A power information display device using a power meter, characterized in that it comprises a power information display means for displaying the data of the power usage received from the power line modem in the indoor of the power consumer. According to claim 1, The power line modem receives the customer information transmitted through the power line from the power supply provider and transmits indoors through the power line, And the power information display means is configured to display the customer information from the power line modem so as to be identifiable. According to claim 1, wherein the power information display means has a power plug coupled to the outlet terminal of the power outlet connected via the power line modem and the power line, characterized in that the power plug has a main body integrally coupled to the rear. Power information display device using a power meter. The power supply information display means according to claim 1, wherein the power information display means has a power plug coupled to an outlet terminal of a power outlet connected through the power line modem and a power line, the power plug being drawn out through a power cable and fixed to a wall of an indoor Power information display device using a power meter, characterized in that it has a main body is fixedly arranged through. 2. The apparatus of claim 1, wherein the power information display means comprises: a power line modem unit for communicating with the power line modem via a power line, and a key input unit for performing selective key input for checking power usage on a predetermined period basis. A microcontroller configured to perform a control for displaying and outputting the power consumption from the electronic electricity meter in a predetermined period unit according to a key input of the key input unit, a display unit for visually displaying the power consumption under the control of the microcontroller; And an alarm generator for generating a voice alarm for notifying a power usage state through the speaker. 6. The apparatus of claim 5, wherein the key input unit of the power information display means sets a target power value of power consumption, And the micro-controller controls the alarm to be generated through the alarm generator when the amount of power measured from the electronic electricity meter exceeds a target power value. 6. The power information display apparatus according to claim 5, wherein the microcontroller of the power information display means controls the display unit to convert the power consumption of a predetermined period unit into an amount of an electric charge so as to be displayed through the display unit. In the electric power measuring device having an electronic watt-hour meter connected to the power supply operator through the information communication network to measure the power consumption consumed by the customer, A serial communication unit provided in the electronic electricity meter and configured to transmit data of power consumption measured by the electronic electricity meter by wired serial communication; Power using the electricity meter, characterized in that connected to the serial communication unit of the electronic electricity meter to enable serial communication in the indoors of the power consumer, the power information display means for displaying the data of the power consumption measured from the electronic electricity meter so as to be identified. Information display. 10. The apparatus of claim 8, wherein the power information display means comprises: a serial communication unit for exchanging information by serial communication with the electronic electricity meter, a key input unit for performing selective key input for checking power usage on a predetermined period basis; A microcontroller configured to perform a control for displaying and outputting the power consumption from the electronic electricity meter in a predetermined period unit according to a key input of the key input unit, a display unit for visually displaying the power consumption under the control of the microcontroller; Power information display device using a power meter, characterized in that it comprises a warning generating unit for generating a voice alarm for notifying the use state of power through the speaker. 10. The apparatus of claim 9, wherein the key input unit of the power information display means sets a target power value of power consumption, And the micro-controller controls the alarm to be generated through the alarm generator when the amount of power measured from the electronic electricity meter exceeds a target power value. In the electric power measuring device having an electronic watt-hour meter connected to the power supply operator through the information communication network to measure the power consumption consumed by the customer, A wireless communication unit provided in the electronic electricity meter and configured to wirelessly transmit data of power consumption measured by the electronic electricity meter; And power information display means for receiving and displaying the power consumption data measured by the electronic electricity meter in a wireless remote communication with the wireless communication unit. 12. The apparatus of claim 11, wherein the power information display means comprises a wireless communication unit for exchanging information by wireless telecommunication with the wireless communication unit of the electronic watt-hour meter, and a selective key input for checking power consumption in a predetermined period unit. A microcontroller configured to perform a control for displaying and outputting the power consumption from the electronic electricity meter in a predetermined period unit according to a key input of the key input unit, and visually displaying the power consumption by the control of the microcontroller. And an alarm generating unit for generating a voice alarm for notifying a state of use of the power through the speaker. The method of claim 12, wherein the key input unit of the power information display means sets a target power value of the power consumption, And the micro-controller controls the alarm to be generated through the alarm generator when the amount of power measured from the electronic electricity meter exceeds a target power value.