KR20100132316A - Apparatus and method for controling power quality with a blackbox, and apparatus for analyzing consumption of electric power by load - Google Patents

Abstract

PURPOSE: An electricity quality control device, a method thereof, and a power usage analysis device thereof are provided to handle power quality by informing a manager of the sensed information in real time. CONSTITUTION: A sensor(100,102,104,106,108) senses the state of a power line. A sensing part(110,112,114,116,118) generates sensing information by collecting information from the sensor. An inner temperature sensor senses self inner temperature compared to the sensing information. A data recorder(180) stores the sensing information. A controller(150) disconnects power inputted to a load according to the sensing information. The controller protects saved information by supplying a disconnection command which disconnects the sensing information and power. A switch part disconnects at least one connection between the data recorder and the load according to the disconnection command.

Description

Power quality management device and method with black box, and power usage analysis device by load {APPARATUS AND METHOD FOR CONTROLING POWER QUALITY WITH A BLACKBOX, AND APPARATUS FOR ANALYZING CONSUMPTION OF ELECTRIC POWER BY LOAD}

The present invention relates to a power quality management apparatus and method having a black box function, and an apparatus for analyzing power usage by load, and more specifically, by detecting an arc, an overcurrent, and an overvoltage, and recording them in a separate record storage. Power quality control device and method with black box function for cause analysis and fire prevention, and device for analyzing power usage by measuring power used in individual electric products.

Electrical fires frequently occur due to overload, arcing, overcurrent, short circuit, and power line temperature rise. In order to prevent such a fire, a circuit breaker (MCCB), an earth leakage breaker (ELB), and an arc fault circuit breaker (AFCI) are generally installed.

In other words, the circuit breaker (MCCB) is used to prevent an electrical accident caused by an overcurrent or a short circuit current, and an earth leakage breaker (ELB) is used to prevent an electric fire or an electric shock that may be caused by leakage of current outside a predetermined path. In order to protect the user by detecting the circuit and cutting off the power.

In addition, an arc fault circuit breaker (AFCI) is used to prevent fire resulting from an arc type fault. Arc-type failures can be caused, for example, by aging, breakdown of insulation and wiring, mechanical and electrical stress due to overuse or overcurrent, connection defects, inadequate power line imprinting in complex work environments, and stripping of power line coverings. It is very diverse such as short circuit.

The arc here is a continuous luminescent discharge that electrically penetrates through the insulating medium, usually accompanied by a partial sublimation of the electrode, which generally separates the cathode and anode by air, and the center of the arc The temperature is attracting attention as the main cause of the electric fire is about 5,000 ~ 15,000 ℃.

However, such a conventional circuit breaker is a certain time elapses until the blocking operation is performed, it is possible to further include the risk of fire during the elapsed time. For example, in the case of a general circuit breaker, when a predetermined time passes through the bimetal in the circuit breaker, the switch is cut off due to the thermal characteristics of the bimetal.

Therefore, it is more difficult to identify the cause of the fire after a fire occurs in the situation where the use of electricity is increasing in electronic products, wiring, and the like today.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems posed in the related art, and an object thereof is to provide an apparatus and a method for managing a power quality for effectively detecting a cause of a fire and recording sensing information accordingly.

In addition, another object of the present invention is to provide a power quality management apparatus and method for quickly shutting off electricity in the event of a fire, and reporting the detection information on the cause of the fire to the administrator in real time.

In addition, another object of the present invention is to provide a power quality management apparatus and method for safely storing without losing the sensed information on the cause of the fire when a fire occurs.

In addition, another object of the present invention is to provide an apparatus for notifying a user of power consumption of a household appliance such as a refrigerator, a TV, and the like in real time.

In order to solve the problems posed above, the present invention, the sensor for detecting the state of the power line, the sensor unit for collecting the information detected from the sensor to generate the detection information when the alarm limit value compared to the alarm limit stored in the self and And an internal temperature sensor unit for detecting its own internal temperature compared to the sensing information, a recording storage unit for storing the sensing information, and a command to cut off power input to the load in response to the occurrence of the sensing information. The control unit protects the stored information by receiving a cut-off command to cut off the detected information and power input to the recording storage unit when the detected internal temperature is higher than the preset reference temperature. Switch means for disconnecting at least one of the record storage and the load side; Provide power quality control equipment with a black-box functionality.

Of course, the record storage unit is surrounded by an insulation case and a nonvolatile memory is used to store the sensing information.

In addition, it is also possible to configure a real-time clock unit for generating a time so that the time at which the sensing information is generated is stored at the same time.

In addition, the power quality management apparatus may further include communication means for transmitting the sensing information to the external management server.

According to another aspect of the present invention, there is provided a power quality management method, which comprises the steps of a sensor detecting a state of a power line, the sensing unit collects information detected by the sensor and compares it with an alarm limit stored in itself. Generating detection information when the alarm threshold value is higher than the threshold value, detecting the internal temperature of the internal temperature sensor unit compared with the sensing information, storing the sensing information by the recording storage unit, and controlling the controller toward the load according to generation of the sensing information. Command to cut off the power input, and receives the internal temperature sensed by the internal temperature sensor unit, and if it is higher than the preset reference temperature, the sensing information input to the record storage unit and the cut-off command to cut off the power are stored. Protecting the recording means and the switch means according to the blocking command to record storage and load And be of a step to block the at least one connection.

In addition, the method may further include blocking power flowing into the load according to the sensing information.

The method may further include generating and storing a time such that the time at which the sensing information is generated is also stored at the same time.

The method may further include transmitting sensing information to an external management server.

Here, the sensor is at least one of the current sensor, the voltage sensor, the temperature sensor, the detection unit detects at least one or more of the arc (arc), overcurrent, leakage current, input voltage, temperature.

In addition, at this time, the external management server may be configured with a display server such as a monitor and a database server storing the sensing information so that the user can see the sensing information.

According to another aspect of the present invention, there is provided an apparatus for analyzing power usage per load. The power usage analyzer includes a power supply for supplying power to a load, a current detector for sensing a current passing through the power supply to generate a current value, and a voltage for sensing a voltage across the power supply to generate a voltage value. The sensing unit, a control unit for receiving the current value from the current sensing unit and the voltage value from the voltage sensing unit and multiplying the current value and the voltage value to calculate the power usage used by the load, and an output means for outputting the power usage .

At this time, the output means may be a display unit for displaying the amount of power consumption, or a communication unit for transmitting the amount of power consumption to the outside.

Here, the communication unit may transmit the power consumption to the outside using a wired or wireless communication method.

In addition, the power connection may be detachably connected between the load and the power outlet, and the load may be a home appliance such as a television, a washing machine, a TV, or the like.

According to the present invention, by effectively recording the effective detection of the cause of the fire and the resulting detection information in the recording storage unit, it is effective to perform the cause analysis after the fire occurrence.

In addition, another effect of the present invention, in the event of an electrical fire due to overload, arc, overcurrent, short circuit, power line temperature rise, etc., the electricity is cut off quickly, and the detected information that may cause the fire occurs in real time manager It is possible to manage the power quality by reporting to the.

In addition, another effect of the present invention is to record the history of information that may cause a fire in the recording storage unit, thereby safely storing the detected information on the cause of the fire without losing it.

In addition, another effect of the present invention is to provide an apparatus for notifying a user of power consumption of a household appliance such as a refrigerator, a washing machine, a TV, and the like in real time.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a system block diagram of a power quality management apparatus using a recording storage unit according to an embodiment of the present invention. The system block diagram includes sensors 100, 102, 104, 106, 108, sensors 110, 112, 114, 116, 118, switch controller 120, real time clock 130, and temperature sensor ( 140, the control unit 150, the communication unit 160, the record cutoff switch unit 170, the record storage unit 180, and the management server 190 are configured. These components are described as follows.

The arc detector 110 detects a current sensed by the first current sensor 100 and transmits it to the controller 150. In this case, a current transformer (CT) is usually used, which is illustrated in FIG. 2A. That is, FIG. 2A is a general circuit diagram using a CT (Current Transfomer) for arc detection of FIG. 1. This will be described later with reference to FIGS. 2A and 2B. In the case of arc detection, unlike an overcurrent, an overcurrent having an instantaneous pulse form (harmonics) is detected.

As described above for the understanding of the present invention, the causes of fire may be caused, for example, by aging, insulation and wiring breakdown, mechanical and electrical stress due to overuse or overcurrent, connection defects and excessive mechanical damage to insulation and wiring. And so on. This arc-coupling is low current and high impedance and generates a current with a root mean square (RMS) below the thermal threshold of the circuit breaker, making the cable disconnect device unresponsive to faults. As a result, fires often occur.

Meanwhile, the first current sensor 100 used here is connected to the neutral conductive power line LINE (N) or the hotline LINE (H), and is a CT type current sensor which is generally used. Such a current sensor is usually obtained by winding a secondary coil around a core wound with a oriented silicon steel sheet in a ring shape, and passing the detected current line (first lane) through the center hole of the ring to obtain an output of the number of turns of the through current. Has a structure. Therefore, ideally, i (out) of the output current is as follows. Of course, this is for the understanding of the present invention and not limited thereto.

[Equation 1]

i (out) = i / n

Here, n is the number of secondary coils.

The overcurrent detector 112 detects a current equal to or greater than a rated current by using a current transformer (CT) as described above, and transmits the current to the controller 150. Of course, for this purpose, the first current sensor 100 connected to the neutral conductive power line LINE (N) is configured. On the other hand, although the power line is shown as two single-phase wires in FIG. 1, the power line is not limited thereto. For example, power lines such as single-phase four-wire or three-phase three-wire may be used.

Therefore, the overcurrent detector 112 rectifies and averages the signal output from the first current sensor 100 to DC to sense the current magnitude. If a current flow is detected by more than a certain amount of current, it is considered an overcurrent, indicating that the current situation of the power line is sufficient to trigger a fire.

The leakage current detector 114 detects a leakage current by using a zero phase current transformer (ZPCT) and transfers the leakage current to the controller 150. Of course, for this purpose, the second current sensor 102 connected to the phase power line LINE (H) and the neutral conductive power line LINE (N) is configured. An example of implementing this is shown in FIG. 3. That is, FIG. 3 is a circuit diagram for detecting a current equal to or higher than a rated leakage current using an image current transformer, similar to the arc detector 110 described above. This will be described later.

The input voltage detector 116 detects an input voltage using a power transformer (PT) and transfers it to the controller 150. Of course, for this purpose, the voltage sensor 104 connected to the phase power line LINE (H) and the neutral conductive power line LINE (N) is configured. Accordingly, the input voltage detector 116 detects the signal by DC rectifying the signal generated from the voltage sensor 104.

Normally, under normal conditions, a voltage corresponding to the rated AC voltage and a rated DC output corresponding to N: 1 are produced. However, in the event of overvoltage or undervoltage, DC voltage is generated which is different from the rated DC output value by a certain voltage or more. Using the generated DC voltage, the input voltage detector 116 determines this as an overvoltage or a low voltage, and transmits the determined result to the controller 150.

The temperature detector 118 detects the temperature of the power line by using a temperature sensor, and serves to transmit the temperature to the controller 150. Of course, for this purpose, the temperature sensor 106 is connected to one of the power lines, the phase power line LINE (H) or the neutral conductive power line LINE (N), or both lines.

Normally, temperature sensors use the property that the resistance of a metal wire or semiconductor changes with temperature. Therefore, the analog output from the temperature sensor is analog-to-digital converted through an analog-digital converter (ADC) device (not shown) to output a digital value corresponding to the temperature. Through this, it is possible to determine whether overheating of the power line occurs by using whether or not the temperature of the power line is above a certain value.

The switch controller 120 receives a command from the controller 150 to control the AC switch unit 108 configured in front of the load 109. That is, when there is an abnormality in the power line according to the information detected by the sensing units 110 to 118, the controller 150 cuts off the power transmitted to the load 109. To this end, the switch controller 120 may be configured by using a thyristor, a relay, a solid state relay (SSR), a magnetic switch (MS), or the like.

The AC switch unit 108 serves to cut off power transmitted to the load 109 by the switch control unit 150.

The real time clock unit 130 is a device that delivers time information for accurately recording the time when the alarm occurred on the power line.

The controller 150 receives information on power line abnormalities from the sensing units 110 to 118, monitors the current state of the power line through the information, generates an alarm when an abnormality occurs, and causes a fire caused by such power line abnormalities. Stores the fire history information to analyze the record storage unit 180.

In addition, the controller 150 controls the switch controller 120 and the recording cutoff switch unit 170 when an alarm occurs according to an excessive risk situation due to a fire, etc., and transfers it to the load 109 or the recording storage unit 180. Shut off the power supply. That is, when a fire occurs, the controller 150 performs a function of turning off the recording cutoff switch unit 170 so that abnormal power is supplied to the recording storage unit 180 so that the memory in the recording storage unit 180 is not damaged. do. 5 is a flowchart illustrating a process of storing and turning off the fire history information.

In addition, the manager transmits the situation information detected by the sensing units 110 to 118 to the management server 190 so that the administrator can grasp the situation of the power line from time to time.

To this end, the control unit 150 uses a microprocessor to execute an algorithm for storing the fire history information, power down, and transmitting the detection information of the power line to the management server 190 and the microprocessor to implement the algorithm. It consists of an internal memory for storing information and data.

The internal temperature sensor unit 140 controls the controller 150 and the record storage unit 180 to protect the recorder 180 in the case of danger of memory destruction in the record storage unit 180 due to an accident such as a fire due to an abnormality on the power line. It serves to provide the controller 150 with temperature information for blocking the data bus.

The communication unit 160 transmits data and signals related to alarm and fire history to the management server 190 or receives a command from the management server 190. Of course, for this purpose, the communication unit 160 may use wired communication such as wired LAN or RS-485, and may use wireless communication such as Bluetooth, wireless LAN, wibree, infrared communication, or the like.

The management server 190 serves to allow a user to view the current state on the power line based on information transmitted from the controller 150 in real time or when a fire occurs. To this end, the management server 190 may be configured with a monitor (not shown), a database server (not shown), and the like.

The record storage unit 180 stores information on the fire history. Therefore, it is connected to or disconnected from the control unit 150 through the recording cutoff switch unit 170 to safely store information stored from the abnormal power source even in the event of a fire. For this purpose, the recording storage section has the configuration shown in FIG. This will be described later in the corresponding drawings.

FIG. 2A is a circuit diagram using a CT (Current Transfomer) for arc detection of FIG. 1. As described above, the arc detection unit 110 is connected to the first current sensor 100 to convert the current of the power line detected by the first current sensor 100 into a digital process, which is illustrated in FIG. 1. The control unit 150 transmits. To this end, the arc detector 110 is configured with an analog-to-digital converter (ADC) operating at a sampling frequency corresponding to at least 2.5 times the minimum commercial power supply frequency.

Therefore, there is a process of extracting the signal through the ADC and then extracting the frequency data through the fast fourier transform (FFT). After that, compare the magnitude of harmonics generated during arc generation to the harmonics generated in the normal state (usually 3F1, 5F1, 7F1, etc.) (see Fig. 2b). A diagram showing this is shown in Figure 2b.

FIG. 2B is a graph showing power measurements in a steady state and power detection values in the occurrence of an arc according to the circuit diagram of FIG. 2A. That is, the power measurement value 210 of the steady state and the power detection value 220 of the arcing state are respectively shown in a graph. Referring to FIG. 2B, 3F1, 5F1, 7F1, and 9F1 do not exceed the threshold in the power measurement 210 in the steady state, but 3F1, 5F1, 7F1, 9F1 are the thresholds in the power measurement 220 when an arc occurs. You can see that it goes beyond.

3 is a circuit diagram using a CT for detecting the leakage current of FIG. As described above, the leakage current detector 112 detects the signal by DC rectifying the signal generated from the second current sensor 102. For this rectification, a bridge diode circuit 300 is configured in the leakage current detector 112. It can also be detected using an ADC.

Therefore, in the normal state, since the current flowing through the two lines of the upper conductive line (LINE (H)) and the neutral conductive line (LINE (N)) corresponding to the AC line flows through the load, they have the same magnitude and the direction is opposite. The sum of the total current flowing through the second current sensor 102 becomes zero. However, when a leakage current occurs through one of the phase power line LINE (H) and the neutral conductive power line LINE (N), the sum of the currents is greater than or equal to a certain magnitude. If more than a certain amount of signal is detected, it is regarded as leakage current, which may cause a fire in the power line, indicating an alarm condition.

FIG. 4 is a block diagram of a recording storage unit that stores detection information of a cause of a fire in FIG. 1. The recording storage unit 180 includes a circuit board unit 400 and a memory unit 410 connected to the circuit board unit. Of course, as described above, the circuit board unit 400 is connected to the write cutoff switch unit 170. Accordingly, the write cutoff switch unit 170 may be turned off by the controller 150 of FIG. 1 when a fire occurs to block abnormal noise and abnormal operation flowing into the circuit board 400.

Since the recording device unit 180 must safely store data for analyzing the cause of the fire after the fire occurs, the recording device unit 180 is surrounded by the fire protection insulation case 305. As a material of the insulation case, gypsum, carbon, polyurethane, or the like may be used.

The memory unit 410 may be a non-volatile memory such as a hard disk drive, a flash memory, a ferro-electric RAM (FRAM), a phase-change RAM (PRAM), a magnetic RAM (MRAM), or the like.

Next, FIG. 5 is a flowchart illustrating a process of storing detection history information on a cause of a fire according to an embodiment of the present disclosure. Referring to Figures 1 to 4 described above, it will be described the detection history information process causing the fire as follows.

Alarm limits are set in advance in the sensing units 110 to 118 of FIG. 1 (step S500). That is, as described above, each of the detection unit 110 to 118 determines that the current state of the power line is abnormal when the current, temperature, voltage, etc. detected from the corresponding sensors 100 to 106 exceed the reference value. Therefore, the alarm threshold, which is a reference value, is set in advance in the detection unit.

Of course, instead of setting the alarm limit value in the detection unit 110, instead of setting it in the control unit 150, it is also possible to determine whether the current, temperature, voltage, etc. transmitted from the detection unit 110 exceeds the limit. Do. This may vary depending on how you design the configuration. Thereafter, steps S510 to S550 are repeatedly performed.

The sensing units 110 to 118 of FIG. 1 detect the current power line state from the power line, that is, the top power line LINE (H) and the neutral conductive power line LINE (N) (step S510). In other words, the arc detector 110 determines whether an arc is generated, the overcurrent detector 112 determines whether an overcurrent occurs, the leak current detector 114 determines whether a leakage current occurs, and the input voltage detector 116 detects an overvoltage. Or, whether a low voltage is generated, the temperature detector 118 detects whether the temperature of the power line exceeds a predetermined value.

The detectors 110 to 118 compare the detected information with a preset alarm comparison value (step S540). That is, sensing information such as detected current, temperature, voltage and the like is compared with a set alarm comparison value.

As a result of the comparison, if the sensed information is larger than the preset threshold, the controller 150 of FIG. 1 stores the sensed information in the record storage unit 180 and also transmits the sensed information to the management server 190 (step S530). That is, it saves data when an alarm occurs. Of course, at this time, the time data from the real time clock unit 130 of FIG. 1 is also stored.

As a result of the comparison of step S540, when the sensing information is greater than the preset threshold, the controller 150 of FIG. 1 detects the internal temperature detected by the internal temperature sensor unit 140 and the preset reference temperature (which is a preset temperature in the controller). (Step S540). In other words, the internal temperature sensor unit 140 measures the internal temperature of the power quality management device (consisting of components excluding the management server 190, the load 109, etc. in FIG. 1). Of course, the preset reference temperature is stored in the controller 150 for such a comparison.

As a result of comparison, if the internal temperature is higher than the preset reference temperature, it may be regarded as a state in which damage to the product may occur due to fire, and thus, the management server 190 and the record storage unit 180 of FIG. And the recording cutoff switch unit 170 is turned off to cut off power and information exchange which flow to the recording storage unit 180. Therefore, since the recording storage unit 180 is wrapped in a heat insulating material, data including the final sensing information is safely stored in the recording storage unit 180 until the recording cutoff switch unit 170 is turned off. That is, since abnormal power and information flow flowing into the recording storage unit 180 are blocked, and error data due to a malfunction of the controller 150 is also blocked, accurate data about the sensing information is safely stored in the recording storage unit 180. Are kept.

That is, in the case of a general circuit breaker, when the overcurrent flows through the bimetal in the circuit breaker for a predetermined time, the delay time is generated because the switch operates by the thermal characteristic of the bimetal. Therefore, during this delay time, the data in the recording storage unit 180 exposed more of the risk of fire. However, according to the present invention according to Figs. 1 to 5, it is possible to store data for cause analysis when a fire occurs without such a delay time.

Next, as another embodiment of the present invention, an apparatus for analyzing real-time power usage of individual household appliances such as a refrigerator, a washing machine, a TV, and the like will be described. A diagram showing a system block diagram of such an apparatus is shown in FIG. 6.

The power usage analysis device 620 includes a current sensor 100, a current detector 612, a voltage sensor 104, a voltage detector 616, a controller 150, a communicator 160, and the like. Since these components perform the functions described with reference to FIG. 1 described above, description thereof will be omitted for clear understanding of other embodiments of the present invention. Of course, the functionality performed may be slightly different from that described in FIG. 1, but since this is only a design problem, the functionality may be similar.

The power usage analysis device 620 further includes a power plug 601 for connecting to an AC power outlet 600 installed on a wall of a building, and a load outlet 602 for connecting to a load 109. That is, the power usage analysis device 620 is inserted between the AC power outlet 600 and the load 109 to detect power flowing into the load 109 from the AC power outlet 600. Therefore, the power plug 601 and the load outlet 602 serve as a power connection part when explained in an easy-to-understand manner. Hereinafter, it is assumed that the power connection portion is composed of a power plug 601 and a load outlet 602.

In addition, as described above, the load 109 may be a household appliance such as a refrigerator, a washing machine, a TV, a computer, etc., but the present invention is not limited thereto. Of course, the load 109 may be one household appliance individually, but may be several household appliances. For example, suppose that a multicode is connected.

Now, let's explain how the power usage analysis device 620 operates.

When the power plug 601 of the power usage analysis device 620 is connected to the AC power outlet 600, and the load 109 is connected to the load outlet 602, the current sensor 100 and the voltage sensor 104. Sense current and voltage, respectively. The sensed current is generated as the current value sensed by the current detector 612, and the sensed voltage is generated as the voltage value sensed by the voltage detector 616.

Of course, in the present invention, for the sake of clarity, the current sensor 100 and the voltage sensor 104 are configured separately from the current detector 612 and the voltage detector 616, but the current detector 612 is a current sensor. 100, the voltage detector 616 may include a voltage sensor 104.

The controller 150 receives the detected current value from the current detector 612, receives the detected voltage value from the voltage detector 616, multiplies the current value by the voltage value, and uses the load 109. Calculate power usage. That is, the controller 150 calculates the amount of power used by the load 109 using the following equation.

[Equation 2]

Here, I is a current value sensed by the current detector 612 and V is a voltage value sensed by the voltage detector 616.

The calculated power consumption is transmitted to the second communication unit 610 provided in the management server 160 of FIG. 1 through the communication unit 160. Thus, as stated above, the power usage of the load 109 can be displayed in real time via the management server 160. Therefore, it is possible to track the power usage remotely.

Of course, it is also possible to configure a display unit (not shown) instead of the communication unit 160 to display the calculated power consumption. That is, the display unit is directly connected to the controller 150 to display the calculated power consumption in real time. As the display unit, an organic light emitting diode (OLED), a liquid crystal display (LCD), or the like may be used.

Although the present invention has been described above with reference to a preferred embodiment, it is clear that the present invention may use various changes, modifications, and equivalents, and may be applied in the same manner by appropriately modifying the above embodiment. Therefore, the protection scope of the present invention will be defined by the claims.

1 is a system block diagram of a power quality management apparatus using a record storage unit according to an embodiment of the present invention.

FIG. 2A is a circuit diagram using a CT (Current Transfomer) for arc detection of FIG. 1.

FIG. 2B is a graph showing power measurements in a steady state and power detection values in the occurrence of an arc according to the circuit diagram of FIG. 2A.

3 is a circuit diagram using a CT for detecting the leakage current of FIG.

FIG. 4 is a block diagram of a recording storage unit that stores detection information of a cause of a fire in FIG. 1.

5 is a flowchart illustrating a process of storing detection history information on a cause of a fire according to an embodiment of the present invention.

6 is a system block diagram of an apparatus for analyzing power usage by load, which analyzes power usage by load according to another embodiment of the present invention in real time.

**** Description of the main signs in the drawings ****

109: load 104: voltage sensor

616: voltage detection unit 100: current sensor

612: current sensing unit 150: control unit

160: communication unit 600: power outlet (AC Consent)

601: AC plug 602: outlet for load (AC Consent)

610: second communication unit

Claims (12)

A sensor for detecting the state of the power line, A detection unit which collects the information detected by the sensor and generates detection information when the alarm limit value is higher than the alarm limit value stored in the sensor; An internal temperature sensor unit for detecting an internal temperature of the sensor compared with the sensing information; A record storage unit for storing the sensed information; Instructs the power input to the load to be cut off according to the generation of the sensing information, and receives the internal temperature sensed by the internal temperature sensor unit and is higher than the preset reference temperature, the sensing inputted to the recording storage unit. A control unit which protects the stored information by giving a blocking command to block information and power; Switch means for disconnecting at least one of the connection between the recording storage unit and the load side according to the blocking command; Power quality management device with a black box function comprising a. The method of claim 1, The sensor is at least one of a current sensor, a voltage sensor, a temperature sensor, the detector detects at least one of arc, overcurrent, leakage current, input voltage, temperature, The recording storage unit is surrounded by a heat insulating material case and a power quality management device having a black box function consisting of a non-volatile memory for securely storing and storing the sensed information. The method of claim 1, And a real time clock unit configured to generate a time for storing and generating a time so that the time at which the sensing information is generated is stored at the same time. The method of claim 1, And a communication means for transmitting the sensed information to an external management server. The sensor detecting the state of the power line, Generating detection information when the detection unit collects the information detected by the sensor and compares it with the alarm limit stored in the sensor, if the alarm limit is greater than or equal to the alarm limit; Sensing an internal temperature of the internal temperature sensor unit compared with the sensing information; Storing, by a record storage unit, the sensing information; The control unit instructs to cut off the power input to the load according to the generation of the detection information, and receives the internal temperature sensed by the internal temperature sensor unit and is higher than the preset reference temperature is input to the record storage unit Protecting the stored information by making a blocking command to block the sensed information and power; Switching means for disconnecting at least one of the recording storage unit and the load side according to the blocking command; Power quality management method with a black box function comprising a. The method of claim 5, The sensor is at least one of a current sensor, a voltage sensor, a temperature sensor, The sensing unit has a black box function for detecting at least one of the arc (arc), overcurrent, leakage current, input voltage, temperature. The method of claim 5, And generating and storing a time so that the time at which the sensed information is generated is stored at the same time. The method of claim 5, And transmitting the detected information to an external management server. A power connection for supplying power to the load, A current sensing unit configured to sense a current passing through the power connection unit and generate a current value; A voltage detector configured to detect a voltage applied to the power connection unit and generate a voltage value; A control unit which receives the current value from the current sensing unit and the voltage value from the current sensing unit and calculates the power consumption used by the load by multiplying the current value and the voltage value; Output means for outputting the power usage amount Load-specific power usage analysis device comprising a. The method of claim 9, And the output means is a display unit for displaying the power consumption amount or a communication unit for transmitting the power consumption amount to the outside. The method of claim 2, The communication unit power usage analysis device for each load for transmitting the power consumption to the outside by wire or wireless. The method of claim 1, The power connection unit is a power usage analysis device for each load is detachably connected between the load and the power outlet.

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