WO2016114613A1 - Power supply state automatic recording system, and recording method using same - Google Patents

Abstract

The present invention relates to a power supply state automatic recording system, and a recording method using the same. More specifically, the purpose of the present invention is to provide a power supply state automatic recording system and a recording method using the same, the system having a power supply black-box function of being able to check, in real time through a power supply state automatic recording device, the number of blackouts, the number of short circuits, the number of surges, the leakage current, and the used current, thereby providing use state information to thus analyze said matters and analyze, in real time using a network, the cause of a short circuit or current leakage and a blackout, and whether or not power supply is stably supplied, so that power supply can be stably supplied. The present invention relates to a power supply state automatic recording system consisting of: a short circuit breaker connected to a power supply input terminal; a power supply state automatic recording device; and load equipment connected to a power supply output terminal, wherein the power supply state automatic recording device comprises: a short circuit detection circuit which detects, through a zero current transformer (ZCT), a short circuit occurring in a power supply line; a leakage current measurement and surge current measurement circuit which measures, through the zero current transformer, the amount of current leaking from the power supply line, and comprises a surge current measurement circuit for detecting lightning or a momentary overcurrent and overvoltage; a used current measurement and surge voltage measurement circuit which measures, through a current transformer (CT), the amount of current used in the power supply line, and comprises a surge voltage measurement circuit for detecting lightning or a momentary overcurrent and overvoltage; a transformer and DC power supply circuit which steps down the voltage at a predetermined rate and outputs the same as DC power; an auxiliary power supply which, if a short circuit breaker operates due to a short circuit or a surge and thus power supply is cut off, delivers auxiliary power through an auxiliary power supply terminal; a microprocessor which receives mode information through a mode selection switch, stores, in a non-volatile memory, and then displays, in a number display device, the number of blackouts, the number of short circuits, and the number of surges added up by detecting the number of blackouts, short circuits and surges of power supply supplied to the power supply line, stores, in the non-volatile memory, and displays, in the number display device, the leakage current and the used current so that the leakage current and the used current can be respectively checked, in real time, through the zero current transformer and the current transformer; and a central center which manages, in a remote location, the number of blackouts, the number of short circuits, the number of surges, the leakage current and the used current.

Description

Automatic power state recording system and recording method using same

The present invention relates to an automatic power state recording system and a recording method using the same, and more particularly, a power black box capable of real-time checking of power failure count, leakage count, surge count, leakage current, and operating current through an automatic power state recording apparatus. It is equipped with the function, whether the power is being supplied stably, the state of leakage or current leakage and power outage mode mode window provides a power state automatic recording system for real-time analysis in the field or remotely over a network, and a recording method using the same. The purpose is to.

In general, most devices or devices used in many industrial fields use electricity as a power source, and devices or devices using such power as a power source must be supplied with electricity stably to operate normally.

Various devices or devices have been developed and used to supply power to the load stably, and one of these is an electric leakage breaker.

A conventional earth leakage breaker is a means to prevent electric shock by detecting a certain leakage current (typically 30mA) .If the sum of the currents is not zero, an earth leakage occurs by measuring the difference between the current going into the power line and the incoming current. Cut off the current as judged.

The earth leakage breaker compares the current transformer (ZCT) that detects leakage current generated from the power line and the current rate detected by the image current transformer, and when the compared value is more than the set value, it is regarded as leakage of current and operates the trip driver. A large current flows under the control of the current measuring unit and the leakage current measuring unit, so that the breaker operates the circuit breaker to cut off the power when the current leaks.

That is, the earth leakage breaker simply detects a change in the input / output current (change in magnetic flux) of the current transformer by the current flowing through the power line to determine whether it leaks, and surge current or noise due to lightning strikes the power line. When the image current transformer reacts, the leakage current measurement unit recognizes the change in current caused by the noise as a leakage current, and operates the trip driving unit to cut off the power to cut off the power supplied to the load device.

On the other hand, conventional patents include a malfunction prevention circuit breaker using a Korean Patent No. 1403972 PWM method, a Korean Patent No. 152839 automatic recovery type circuit breaker, and a Korean Patent Registration No. 1089719 an earth leakage circuit breaker automatic recovery device.

However, since the ground fault circuit breaker is integrated, the existing ground fault circuit breaker needs to be removed and a new installation is required. Therefore, waste is generated when the ground fault circuit breaker is disposed, and there is a problem that causes pollution to the environment.

In addition, since the user cannot directly check the power supply status in real time, no action can be taken in advance, and cumulative power state information is not stored, and thus a long-term stable power supply plan cannot be established.

In addition, when the earth leakage breaker is cut off, in order to determine the cause of the power failure, the earth leakage breaker has no choice but to be exposed to a very dangerous situation for electrical safety.

<Preceding technical literature>

(Patent Document 1) Korean Registered Patent No. 1403972

(Patent Document 2) Korean Registered Patent No. 1452839

(Patent Document 3) Korean Registered Patent No. 1089719

The present invention has been made to solve the above problems, the present invention provides the power supply status information supplied to the load connected to the power line in real time through the network, such as the number of power failure, leakage, surge, leakage current, and By providing information on the use status of the power consisting of the current, it automatically records the power status by analyzing them remotely or at the site to check whether the power is being supplied stably, and by analyzing the leakage or current leakage and the reason of power failure. It is an object to provide an apparatus and method.

 In addition, the present invention is an automatic power state recording device and method that allows the automatic recording of the power state through the auxiliary power source even when the power is turned off by the power breaker, so that the power state can be analyzed by analyzing these records to take appropriate measures. The purpose is to provide.

In order to solve the above problems, the present invention provides a power state automatic recording system comprising an earth leakage breaker connected to a power input terminal and an automatic power state recording device and a load device connected to a power output terminal. A ground fault detection circuit for detecting a ground fault occurring in a line through an image current transformer (ZCT); Leakage current measurement and surge current measuring circuit including a surge current measuring circuit for measuring the amount of current leaking from the power line through the image current transformer, and detects lightning strikes, instantaneous overcurrent, overvoltage; A current measuring and surge voltage measuring circuit including a surge voltage measuring circuit for measuring an amount of current used in a power line through a current transformer CT and detecting lightning, instantaneous overcurrent, and overvoltage; A transformer and a DC power supply circuit for stepping down a voltage at a predetermined ratio and outputting the DC power; An auxiliary power source that transfers auxiliary power through an auxiliary power terminal when the power is interrupted by an electric leakage or surge; Mode information is input through the mode selection switch, and the total number of interruptions, leaks, and surges is stored in the nonvolatile memory after detecting the power failure, leakage, and surge count of the power supplied to the power line. A microprocessor configured to display and store the leakage current through the image current transformer and the current used through the current transformer in a nonvolatile memory and display the number of times on a display device; And a central center for remotely managing the number of interruptions, the number of leaks, the number of surges, the leakage current, and the current used.

The microprocessor of the present invention receives a preset reference set value, and when the power failure count, leakage count, surge count, leakage current, and the use current exceeds the reference set value, the communication to control to transmit to the remote center in real time Protocol modules; An alarm warning module for generating an alarm warning when the number of power failures, the number of leakages, the number of surges, the leakage current, and the use current exceeds the reference set value compared to the reference set value; A counting module for counting the number of interruptions, the number of leaks, and the number of surges by detecting a power outage, a short circuit, and the number of surges of the power supplied to the power line; And a mode selection module configured to receive mode information selected through the mode selection switch.

The auxiliary power supply of the present invention is characterized by maintaining the automatic recording of the power state even when the power is turned off by the power circuit breaker, thereby analyzing the records to check the power state and taking appropriate measures.

The communication device of the present invention is characterized by including a wired serial communication, short-range wireless communication (Zigbee), and long-range wireless communication (CDMA) functions to enable remote monitoring via wired / wireless.

According to an aspect of the present invention, there is provided a method for automatically recording a power state, the method comprising: receiving mode information of one of a power failure count, an electric leakage count, a surge count, a leakage current, and a use current through a mode selection switch; Detecting, by the microprocessor, whether the power supplied to the power line is cut off, and storing the number of interruptions, the number of leaks, and the number of surges in the nonvolatile memory and displaying the counts on the count display device; Storing the leakage current through the current transformer and the current used by the current transformer in a nonvolatile memory so that the microprocessor can check in real time; And transmitting a power failure count, an electric leakage count, a surge count, a leakage current, and a use current through the communication device to a central center of a remote site in real time if the preset reference set value is exceeded.

The present invention made as described above can be easily connected to the earth leakage breaker and load equipment to reduce the cost, as well as the user directly checks the power supply status in real time, or connected to the smart phone or the central center network There is an effect that can be conveniently checked through.

In addition, the present invention displays the number of power outage, leakage, surge, leakage current, use current, etc. by mode so that the current leakage current amount and usage can be checked without a leakage ammeter or ammeter, and the site of accident occurrence or network Through the remote site, you can check the number of times and the amount of current, and by using the accumulated statistical data for a long time, you can prevent accidents such as fires caused by a short circuit in advance, and immediately check whether the power supply is stable and take action in advance. It is possible to supply more stable power to the load.

In addition, the present invention has the effect of improving the reliability of the product by checking the power status by analyzing these records by checking the power state automatic recording through the auxiliary power even when the power is turned off by the power breaker. .

In addition, the present invention has an effect that can easily determine the cause of the power failure without operating the earth leakage breaker for electrical safety when the auxiliary battery or portable auxiliary power contact or insert coupling to the auxiliary power terminal.

In addition, even if the present invention further includes an auxiliary power supply for transmitting auxiliary power inside the automatic power state recording device, the auxiliary power can be used for a long time by transferring the auxiliary power only when the auxiliary power connection button is pressed.

1 is a view showing a central center and mobile terminals networked with a power state automatic recording device to show the overall configuration of the power state automatic recording system according to the present invention.

FIG. 2 is a view showing in detail the appearance of the automatic power state recording apparatus of FIG. 1.

3 and 4 are diagrams showing the detailed configuration of the automatic power state recording apparatus according to the present invention.

5 is a diagram illustrating a detailed configuration of the microprocessor and the nonvolatile memory of FIGS. 3 and 4.

6 is a view showing an operation sequence according to the automatic power state recording method according to the present invention.

The present invention provides a power state automatic recording system comprising an earth leakage breaker connected to a power input terminal and an automatic power state recording device and a load device connected to a power output terminal. An earth leakage detection circuit for detecting through an image current transformer (ZCT); Leakage current measurement and surge current measuring circuit including a surge current measuring circuit for measuring the amount of current leaking from the power line through the image current transformer, and detects lightning strikes, instantaneous overcurrent, overvoltage; A current measuring and surge voltage measuring circuit including a surge voltage measuring circuit for measuring an amount of current used in a power line through a current transformer CT and detecting lightning, instantaneous overcurrent, and overvoltage; A transformer and a DC power supply circuit for stepping down a voltage at a predetermined ratio and outputting the DC power; An auxiliary power source that transfers auxiliary power through an auxiliary power terminal when the power is interrupted by an electric leakage or surge; Mode information is input through the mode selection switch, and the total number of interruptions, leaks, and surges is stored in the nonvolatile memory after detecting the power failure, leakage, and surge count of the power supplied to the power line. A microprocessor configured to display and store the leakage current through the image current transformer and the current used through the current transformer in a nonvolatile memory and display the number of times on a display device; And a central center for remotely managing the number of interruptions, the number of leaks, the number of surges, the leakage current, and the current used.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiment of the present invention may be modified in various forms, the scope of the invention should not be construed as limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. It should be noted that the same / similar components in each of the drawings may be illustrated with the same reference numerals. In addition, detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention are omitted.

As shown in FIG. 1, the automatic power state recording system according to the present invention includes an earth leakage breaker 10 connected to a power input terminal, a power state automatic recording device 20, and a load device 30 connected to a power output terminal. The central state 40 and the mobile terminals connected to the network so that the power state automatic recording device 20 can check the number of power failures, leakages, surges, leakage currents, and currents detected by the communication device. 41, 42) or the like.

The automatic power state recording device 20 shown in FIG. 2 includes a power input terminal 21, a number display window 22, a mode display window 23, a mode selection switch 24, an auxiliary power terminal 25, and a power output terminal. It consists of 26.

The earth leakage breaker 10 is connected to the power input terminal 21 shown in FIG. 2, the load equipment 30 is connected to the power output terminal 26, and the number display window 22 is an automatic power state recording device 20. ) Is a number window that displays the number of power outages, leakages, surges, leakage currents, and currents detected by the control panel. The mode display window 23 is a window showing information that a user wants to display through the mode selection switch 24. .

That is, the information displayed on the mode display window 23 is sequentially changed according to the number of times the user presses the mode selection switch 24, and when a certain number of times is pressed or continuously pressed for a predetermined time (for example, 3 seconds). It can also act as a reset button.

As shown in FIGS. 3A and 3B, the automatic power state recording device 20 according to the present invention includes a power state automatic recording device 20 connected between the power input terminal 101 and the power output terminal 105. Zero current transformer (ZCT) 102z and 103z and current transformer 104, leakage current measurement and surge current measurement circuit 112, and current measurement, respectively, connected to the wires. The surge voltage measuring circuit 113 is connected, and the transformer and DC power supply circuit 114 and the auxiliary power supply 115 are further connected to provide power.

The circuit of the ground fault detection circuit 111 of FIGS. 3A and 3B is configured by a converter including an amplifier and a comparator to detect a ground fault generated in a power line through an image current transformer (ZCT) and compare currents detected by the current transformer. to be.

The leakage current measurement and surge current measurement circuit 112 of FIGS. 3A and 3 includes a surge current measurement circuit for measuring an amount of current leaking from a power line through an image current transformer, and detecting lightning, instantaneous overcurrent, and overvoltage. Circuit.

3A and 3B, the surge current measuring circuit 113 measures the amount of current used in the power supply line through a current transformer CT, and detects a lightning voltage, an instantaneous overcurrent, and an overvoltage. It is a circuit that includes.

Details of the above circuits are described in detail in an earth leakage circuit breaker which prevents a malfunction due to the surge of Korean Patent No. 1402046 and a Korean Patent No. 1039351, filed and registered by the present inventor.

The transformer and DC power supply circuit 114 of Figs. 3A and 3B is a device and a circuit for stepping down a voltage at a predetermined ratio and outputting the DC power.

The auxiliary power supply terminal 25 of FIG. 3A allows the portable auxiliary power supply to be electrically coupled to deliver the auxiliary power to the automatic power state recording device 20 even when the power is interrupted due to a short circuit or surge. As a terminal, for example, when a temporary battery including a 9V battery connection terminal is carried and brought into contact with or inserted into the auxiliary power supply terminal 25, the display function of the automatic power state recording device is restored, and the number display device shows the current number of interruptions and short circuits. By displaying the number of times, the number of surges, and the like to determine the cause of the power interruption in advance without taking the earth leakage breaker for electrical safety, and take appropriate measures, it is possible to operate the power supply stably.

In the auxiliary power supply 115 of FIG. 3B, the auxiliary power supply and auxiliary power connection buttons for transmitting auxiliary power to the inside of the housing of the automatic power state recording device 20 when the power is interrupted due to a short circuit or a surge are operated. 27) can be added.

When the auxiliary power connection button 27 is pressed here, auxiliary power is supplied and power state information is displayed on the number display window.

Therefore, the auxiliary power can be used for a long time by transferring auxiliary power only when the auxiliary power connection button 27 formed on the exterior of the automatic power state recording device 20 is pressed.

In other words, even if the earth leakage breaker is operated due to a short circuit or surge, the auxiliary power is delivered through the auxiliary power terminal to check the automatic record of the power status. Can be prevented in advance.

Therefore, the power state automatic recording device 20 acting as a black box is connected by arbitrarily connecting power such as an external battery to supply power to the display device when the commercial power is cut off so that information stored in the memory can be displayed. Can be supplied.

The communication device 140 of FIGS. 3A and 3B is a device for transmitting the number of power failures, the number of leakages, the number of surges, the leakage current, and the use current to a central center 40 at a remote location, so that remote monitoring can be performed via wired / wireless communication. Wired serial communication, near field communication (Zigbee), and long distance wireless communication (CDMA) functions.

The microprocessor 121 of FIGS. 3A and 3B receives the mode information of the mode selection switch, detects the power failure, the leakage, and the number of surges of the power supplied to the power line, and compares the total number of interruptions, leakages, and surges. The data is stored in the volatile memory and then displayed on the number display device 131.

Specifically, the microprocessor 121 of FIGS. 3A and 3 determines the number of power failures as the power is cut off for 40 ms or more, and when the power is cut off, the internal DC power of the automatic power state recording device 20 is gradually lowered. It is immediately stored in nonvolatile memory and automatically counts when there is a power outage when power is restored.

In addition, the microprocessor 121 of FIG. 3A and FIG. 3 detects that there is a short circuit in the ground fault detection circuit 111 by operating the ground fault breaker by the occurrence of a short circuit, and when the leakage current is 15 mA or more, the ground fault breaker is safe. The controller automatically cuts off the power supply and immediately stores the leakage current in nonvolatile memory.

In addition, the microprocessor 121 of FIGS. 3A and 3B determines the number of surges as a state in which a surge voltage and a current due to lightning are drawn on a power line, and in the case of a surge voltage, a surge inside the power state automatic recording device 20. The protection element (varistor) discharges, and the discharge current is sensed by the current transformer, and in the case of the surge current is controlled to detect by the image current transformer.

Accordingly, the microprocessor 121 of FIGS. 3A and 3B stores the leakage current through the current transformer and the current used through the current transformer in a nonvolatile memory, and receives a predetermined reference set value, such as a power failure count, an electric leak count, When the number of surges, the leakage current, and the use current exceed the reference set value, it may be controlled to transmit the remote center to the remote center 40 in real time.

Therefore, the automatic power state recording device 20 according to the present invention configured as described above wastes electricity by detecting leakage current at a place where leakage current may occur under the control of the microprocessor, and preventing leakage of current in advance. Of course, it is also possible to prevent a fire caused by a short circuit in a humid place.

To this end, the microprocessor illustrated in FIG. 4 includes a communication protocol module 1211, a count calculation module 1212, a mode selection module 1213, and the like.

The communication protocol module 1211 of FIG. 4 receives a preset reference set value, when the power failure count, the leakage count, the surge count, the leakage current, and the use current exceed the reference set value, to the remote center center 40 in real time. Modules for controlling transmission, include, for example, wired serial communications, near field communications (Zigbee), and long range wireless communications (CDMA) protocols.

The number estimating module 1212 of FIG. 4 is a module for detecting the number of interruptions, the number of leaks, and the number of surges by detecting the number of interruptions, leaks, and surges of the power supplied to the power line.

The mode selection module 1213 of FIG. 4 is a module that receives mode information selected through a mode selection switch.

For example, when the mode selection switch 24 is sequentially pressed in the mode selection module 1213, the lamp is turned on by the number of power failures when the lamp is turned on, and the number of power failures is displayed through the number display window 22. When the light is turned on, the number of leaks is displayed through the number display window 22, the third is the number of surges, the lamp is turned on, and the number of surges is displayed through the number display window 22, and the fourth is the lamp with the leakage current. The current is displayed through the number display window 22, and the fifth time, the lamp is turned on to the used current, and the used current is sequentially displayed through the number display window 22.

In addition, the alarm warning module 1214 of FIG. 4 is a module that generates an alarm warning when the number of interruptions, the number of leaks, the number of surges, the leakage current, and the use current exceeds the reference set value.

The information generated by the modules 1211, 1212, 1213, and 1214 may be stored in the nonvolatile memory 122, and the information stored in the memory may be backed up to another storage means. Ordinary USB memory and the like can be used.

Hereinafter, an automatic power state recording method for implementing the present invention will be described in detail.

As shown in FIG. 5, the earth leakage breaker 10 is connected to the power input terminal of the automatic power state recording device 20 according to the present invention, and the load equipment 30 is connected to the power output terminal.

Then, the mode selection switch receives one mode information of power failure count, leakage count, surge count, leakage current, and use current (S101).

In this case, when the number of interruptions, the number of leaks, and the number of surges is selected, the result of the counting according to the number is displayed (S111, S112, S113, S121).

That is, the microprocessor continuously detects whether the power supplied to the power line is cut off and displays the number of power failures, leakages, and surges stored in the nonvolatile memory on the number display device.

In addition, when the leakage current and the use current are selected, the microprocessor stores and displays the leakage current through the current transformer and the current through the current transformer in a nonvolatile memory for real-time confirmation (S114, S115, S131, and S132).

Subsequently, when the number of interruptions, the number of leaks, the number of surges, the leakage current, and the use current exceed a preset reference setting value through the communication device (S123, S133), the mobile terminal or the center including the remote smart phone in real time. The wireless alarm alert is transmitted to the center (S141).

The present invention described above can be easily installed in the earth leakage breaker 10 and the load equipment 30 by the power input terminal 101 and the power output terminal 105, as well as reducing the cost required, in real time The user can directly check the power supply state through the number of display windows 22 and the mode display window 23, or can conveniently check the PC 43 through the smart phone 41 or the central center 40 connected to the network. .

In addition, the present invention displays the number of power failures, the number of leaks, the number of surges, the leakage current, the use current and the like through the number display window 22 and the mode display window 23 by mode, each time even in the field or remote locations through the network And the amount of current can be checked, and statistical data accumulated over a long period of time prevents accidents such as a fire caused by a short circuit in advance, and can immediately check whether the power supply is stable and take preliminary measures. Can supply stable power.

In addition, when the auxiliary battery or the portable auxiliary power source 115 is contacted or inserted into the auxiliary power terminal 25, the present invention facilitates the cause of the power failure without operating the ground fault breaker 10 for electrical safety. There is an effect that can be identified.

In addition, although the present invention further includes an auxiliary power supply 115 for transmitting auxiliary power to the inside of the automatic power state recording device 20, the auxiliary power supply for a long time by transferring auxiliary power only when the auxiliary power connection button 27 is pressed. 115) can be used.

Claims (5)

In the power state automatic recording system consisting of an earth leakage breaker connected to the power input terminal, a power state automatic recording device and a load device connected to the power output terminal, Power state automatic logger, A ground fault detection circuit for detecting a ground fault occurring at a power line through an image current transformer (ZCT); Leakage current measurement and surge current measuring circuit including a surge current measuring circuit for measuring the amount of current leaking from the power line through the image current transformer, and detects lightning strikes, instantaneous overcurrent, overvoltage; A current measuring and surge voltage measuring circuit including a surge voltage measuring circuit for measuring an amount of current used in a power line through a current transformer CT and detecting lightning, instantaneous overcurrent, and overvoltage; A transformer and a DC power supply circuit for stepping down a voltage at a predetermined ratio and outputting the DC power; Mode information is input through the mode selection switch, and the total number of interruptions, leaks, and surges is stored in the nonvolatile memory after detecting the power failure, leakage, and surge count of the power supplied to the power line. A microprocessor configured to display and store the leakage current through the image current transformer and the current used through the current transformer in a nonvolatile memory so as to be checked in real time and display the number of times on a display device; And Power status automatic recording system including ;; a central center for remotely managing the number of power failure, leakage, surge, leakage current, and current. The method of claim 1, And an auxiliary power terminal electrically coupled to a terminal of an auxiliary power supply for transmitting auxiliary power, when the power is interrupted by an electric leakage or surge. The method of claim 1, When the power is interrupted due to a short circuit or surge, the power is cut off, and further includes an auxiliary power supply to the power state auto recorder in the inner housing of the power state auto recorder, and when the auxiliary power connection button is pressed Auxiliary power is supplied to the power state automatic recording system, characterized in that the power state information is displayed on the frequency display window. The method of claim 1, The microprocessor, A communication protocol module including a communication protocol for receiving a preset reference set value, and transmitting wirelessly to a central center of a remote site in real time when the number of power failure, the number of leakage, the number of surges, the leakage current, and the use current exceed the reference set value; An alarm warning module for generating an alarm warning when the number of power failures, the number of leakages, the number of surges, the leakage current, and the use current exceeds the reference set value compared to the reference set value; A counting module for counting the number of interruptions, the number of leaks, and the number of surges by detecting a power outage, a short circuit, and the number of surges of the power supplied to the power line; And And a mode selection module for receiving mode information selected through the mode selection switch. In the automatic power state recording method, Receiving mode information of one of a power failure count, an electric leakage count, a surge count, a leakage current, and a use current through a mode selection switch; Detecting, by the microprocessor, whether the power supplied to the power line is cut off, and storing the number of interruptions, the number of leaks, and the number of surges in the nonvolatile memory and displaying the counts on the count display device; Storing the leakage current through the current transformer and the current used by the current transformer in a nonvolatile memory so that the microprocessor can check in real time; And When the power failure count, the leakage count, the surge count, the leakage current, and the use current exceed the preset reference values through the communication device, generating an alarm warning and transmitting the alarm to the central center of the remote site in real time; Automatic power state recording method comprising a.

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