KR20110029355A - The remote electricity safety management system installed in digital cabinet panel - Google Patents

Abstract

PURPOSE: A remote electricity safety management system installed in a digital cabinet panel is provided to store information of leakage current, the on/off state of a circuit breaker, and overcurrent and transfer it to an upper server. CONSTITUTION: A remote electricity safety management system installed in a digital cabinet panel comprises: a voltage/current sensing module(200) receiving a detection signal from a current transformer and a zero phase current transformer and outputting it; a digital control module converting an output signal from the voltage/current sensing module into a digital to detect the voltage/current state and the on/off state of a main circuit breaker and a branch circuit breaker; a senor module(600) detecting the conditions of the digital cabinet panel; a gateway module(500) storing the output data from the digital control module and the sensing data from the sensor module and transmitting them to an upper server.

Description

The remote electricity safety management system installed in digital cabinet panel

The present invention is applied to a controller such as a digital distribution panel or switchgear, and has a data storage function and a data transmission function to an upper server for various events such as ON / OFF state of a contact of a leakage current, a breaker, and an overcurrent, and at the same time, electrical safety The present invention relates to a digital distribution panel remote management system that detects harmful environmental elements as a sensor module and transmits them to a server through RF network communication.

Typically, the main causes of electrical fires are short circuits, overcurrents, arcs and leakage currents. As a continuous effort to reduce the occurrence of electrical fires, individual equipment such as breakers can be used to prevent fire accidents in power distribution boards and switchboards by preventing power supply in the event of short circuit, over current, or short circuit.

When a circuit breaker is installed in a conventional distribution panel or a distribution panel, a micro switch is mounted inside to transmit a breaker state.

1 shows a three-phase wiring circuit breaker equipped with a micro switch for detecting a power supply state installed in a conventional distribution panel. Referring to FIG. 1, the circuit breaker includes a micro switch.

More specifically, the conventional circuit breaker for three-phase circuit breaker is operated by turning on / off the contact of the micro switch using the mechanism inside the circuit breaker using the micro switch.

In addition, the circuit breaker is configured by adding a remote monitoring function so that the administrator can monitor the operation state as an external signal. In other words, the micro switch generates an alarm signal indicating that a trip occurred due to an abnormal state, and sends an alarm signal to an external manager to notify that the breaker is tripped.

However, in the case of the circuit breaker equipped with the micro switch 10, it is not easy to mount the micro switch in a narrow space, the cost is increased due to the increase in the number of installation of the circuit breaker, and the contact loss due to the friction in the driving direction of the mechanism part is feared. It is becoming.

In addition, the micro-switch 10 is virtually difficult to install in a small circuit breaker such as a single-phase earth leakage breaker, so that there is no distribution panel having a function of accurately detecting the state of the earth leakage breaker.

In addition, unlike a circuit breaker, a switchboard equipped with a line switch for transmitting a signal to the outside by installing a micro switch for each earth leakage breaker installed in a plurality of switchboards is also a problem in terms of price and difficulty in equipment. It has a problem that is virtually impossible.

In addition, there is still a shortage of distribution panels equipped with a remote system for remotely monitoring the arc and leakage current, overcurrent, overvoltage, and on / off state of the breaker through the manager at all times.

In a controller of a conventional distribution panel or switchboard system, measurement of AC voltage is required for power monitoring or measurement. Here, the controller of the distribution panel or switchboard system is composed of a circuit insulated from the primary AC side for reasons of stability.

However, if the AC voltage measuring circuit or the sensing circuit of the primary side is configured in the non-isolated form in the system controller, the controller of the insulated configuration is again in the non-isolated form for reasons of stability with the AC power supply side.

Representative examples of the conventional method for detecting an isolated AC voltage is to insulate using a low frequency transformer and to obtain a voltage value by dropping the voltage, or to divide the magnitude of an expensive dedicated semiconductor integrated circuit or an AC voltage to a low voltage. The method of reading from each processor is used. However, due to the bulky circuit size, low density, and heavy weight, it is contrary to the recent trend of the semiconductor and electronics industry.

In the prior art, the AC voltage sensing circuit has been used in various ways, but in general, the AC voltage terminal and the DC voltage terminal are not electrically insulated.

In other words, when the AC voltage sensing circuit uses a high-priced dedicated semiconductor integrated circuit or a method of dividing the magnitude of the AC voltage into low voltages and reading them from each processor, the output signal of the dedicated semiconductor integrated circuit and the driving of each processor are used. The power supply is commonly connected to the commercial power supply side, which is the primary side, and ground. In order to read these voltage signals and use them as alarms or control signals in secondary systems such as digital devices and controllers, the ground of the secondary system must also be common, which insulates the primary and the secondary, the ground of the system. This does not have the problem.

Therefore, in general, a digital device or a controller is electrically insulated from an AC voltage terminal, and a conventional non-isolated AC voltage sensing circuit has many difficulties in handling by a user. There is a problem that the operation is not easy.

Existing low voltage distribution panel and distribution panel were passive type, but recently, electronic controllers are combined to measure the quality of power and quantity of electricity and develop digital transmission.

However, the existing low-voltage distribution panel or switchgear panel lacks the important function of measuring and transmitting the hazards necessary for electrical safety. Therefore, it is difficult to analyze the cause of fire that was actually caused when the distribution panel or switchgear was damaged by electric fire. It was difficult to find a proper preparation for it.

Therefore, there is a problem that the existing distribution panel or switchgear system is insufficient to be applied to the U-City system, which is a trend of pursuing convenience and safety of life by combining with IT technology.

In order to solve the above problems, the present invention is applied to a controller of a digital distribution board and has a data storage function and a data transmission function to a higher server for various events such as leakage current, ON / OFF state of a contact point of a breaker, and overcurrent. It aims at presenting distribution board remote management system.

In addition, in order to solve the above problems, an object of the present invention is to provide a digital distribution panel remote management system that can detect harmful environmental factors that threaten electrical safety as a sensor module and transmit them to the upper server through network communication.

In addition, an object of the present invention is to provide a remote management system of a digital distribution panel or a distribution panel equipped with SMPS configured to sense the magnitude of the AC voltage as an isolated DC voltage signal.

In order to achieve the above object, the present invention provides a remote electrical safety management system equipped with a main circuit breaker and a branch circuit breaker and is installed in a digital distribution panel in which an alternating current is input through a power line, wherein the branch circuit breaker is connected to the power line. A voltage / current sensing module for receiving and outputting a signal detected through a power line, a built-in current transformer, and an image current transformer; A digital control module for digitally converting a signal output from the voltage / current sensing module to detect a voltage / current state and an ON / OFF state of the main circuit breaker and the branch circuit breaker and output detection data; A sensor module for detecting a surrounding environment of the digital distribution panel and outputting sensing data through a wireless network; A gateway module for storing the detection data output from the digital control module and the sensing data output from the sensor module and transmitting the detected data to a remote server; And a SMPS for supplying the digital control module and the gateway module by converting an AC current of the power line into a DC current and supplying the remote electrical safety management system installed in the digital distribution panel.

The voltage / current sensing module includes: a sensing resistor for converting an AC current signal sensed by the current transformer or an image current transformer into an AC voltage signal; An amplifier for amplifying the AC voltage signal converted by the sensing resistor; A power supply side photocoupler connected to the power supply terminal line of the branch circuit breaker and receiving power from the power supply side and receiving a signal output from a terminal of a transistor that is turned on when the diode emits light to sense a power supply state on the power supply side; And a load side photocoupler connected to the load side terminal line of the branch circuit breaker and receiving power from the load side to receive a signal and a signal output from a terminal of a transistor that is turned on when the diode emits light to sense a power state of the load side. It may be configured to include.

The digital control module includes a signal processing module for detecting a state of an AC voltage signal amplified by the amplifier; An effective value converter for converting an AC voltage signal processed through the signal processing module into an effective value of direct current; An AD converter for converting the rms value of the direct current converted by the rms value converter into a digital signal; A power input / output terminal for receiving signals output from the power supply side photocoupler and the load side photocoupler; A control unit for sensing a power state of a power side and a load side from a signal received at the power input / output terminal and processing a digital signal; A digital input / output unit to which the AD converter and the digital signal converted by the controller are input; And a microprocessor controlling the branch circuit breaker while compensating and determining the digital signal received through the digital input / output unit.

The digital input / output unit outputs a digital forced trip signal according to a current and voltage state determined by the microprocessor, and the forced trip signal is analog-converted through the control unit and output through the power input / output terminal to penetrate the image current transformer. It can be configured to.

The SMPS includes: a peak voltage detector configured to generate a signal by converting a highest value from an AC voltage inputted by full-wave rectification and input into a DC value so that the magnitude of the AC voltage is sensed and outputted in the form of a DC voltage; A triangular wave oscillator for oscillating a triangular wave whose magnitude is compared with a DC value of the peak voltage detector; A comparator unit for generating a square wave while performing a switching operation by comparing the magnitude of the DC value of the peak voltage detector with the magnitude of the triangular wave; An insulation and signal transmission unit including a photocoupler which is turned on when the square wave is generated in the comparator unit and transmits the square wave to the secondary side; And a smoothing and adjusting unit converting the square wave signal transmitted through the insulation and signal transmitting unit into a DC value.

The triangular wave oscillator may include a zener diode for adjusting the magnitude of the waveform of the triangular wave.

The comparator maintains the output of TTL High when the DC value of the peak voltage detector is greater than the size of the triangular wave of the triangular wave oscillator. The output is TTL when the DC value of the peak voltage detector is smaller than the size of the triangle wave of the triangular wave oscillator. The square wave may be generated by a pulse width modulation method to maintain Low, and the magnitude of the signal transmitted to the secondary side may vary according to the magnitude of the primary AC voltage.

The insulation and signal transmission unit includes a diode that is turned on when a square wave is generated in the comparator unit and a transistor that is turned on when a base voltage is applied from the diode, so that the Vcc_S voltage of the secondary side is applied while the transistor is turned on. Can be.

The smoothing and adjusting unit may include a smoothing circuit for converting the DC value through a duty ratio of the pulse width of the square wave transmitted to the secondary side, and an adjusting circuit including a variable resistor for adjusting the magnitude of the converted DC value. .

The gateway module may include: a data storage configured to store detection data output from the digital control module and sensing data output from the sensor module; And a processor controlling a flow of detection data output from the digital control module and sensing data output from the sensor module and transmission to a remote server.

The sensor module may include a heat sensor, a smoke sensor, a submersion sensor, a vibration sensor, and an outlet contact failure detection sensor, and may be configured to transmit a detection signal to the gateway module through a Zigbee wireless communication method.

The outlet contact failure detection sensor may include a voltage detector configured to detect a voltage of the outlet; An amplifier for amplifying the signal waveform output from the voltage detector; A reference voltage generator for generating a reference voltage for the voltage state of the contact failure of the voltage detector; A comparator for comparing the output signal of the amplifier and the output signal of the reference voltage generator to determine an increased voltage amount; And a communicator configured to digitize the increased voltage determined by the comparator and transmit the digitized voltage to the gateway module.

The following effects can be achieved with the remote management system installed in the digital distribution panel according to the present invention.

First, through the voltage / current sensing module and the digital control module of the digital distribution panel of the present invention, by extracting and digitizing the signal for overcurrent, leakage current, overvoltage, the state of the circuit breaker, and transmits to the remote server while storing through the gateway module It is possible to prevent electrical fires by taking prompt measures for electrical equipments that have signs of electrical fires.In addition, by storing all extracted data in the data storage of the gateway module, it is objective to prevent arc, overcurrent, overvoltage, leakage current, etc. It is effective to obtain scientific data, analyze the cause of electric fire and take appropriate measures based on it.

Secondly, in the SMPS configured in the digital distribution panel of the present invention, by detecting the magnitude of the AC voltage as an electrically insulated DC voltage, it is easy for a user to handle the digital controller of the digital distribution panel electrically insulated from the AC voltage terminal. Various circuit configurations are possible.

Third, the centralized method can be managed by storing the harmful electrical safety environment elements detected through the sensor module of the remote management system installed in the digital distribution system according to the present invention through the gateway module and transmitting them to the remote server. There is.

Hereinafter, a remote electricity management system installed in a digital distribution panel according to the present invention will be described in detail with reference to the accompanying drawings.

The digital switchboard or switchboard means a switchboard or switchboard having a user interface and a communication function by applying digital technology to signals detected by existing analog relays or breakers.

2 is a block diagram of a remote electrical safety management system installed in a digital distribution panel according to the present invention.

As shown, the remote electrical safety management system according to the present invention includes a main circuit breaker (not shown), a branch circuit breaker 100, and a voltage / current sensing module 200 for sensing voltage and current in a power line in the branch circuit breaker. Digital control module 300 for digitally converting the signal output from the voltage / current sensing module to detect the voltage, current, and the state of the main circuit breaker and the branch circuit breaker, and output detection data to detect the surrounding environment of the digital distribution panel. The sensor module 600 for outputting sensing data through a wireless network, the gateway module 500 for transmitting the detection data output from the digital control module and the sensing data output from the sensor module to a remote server, and the digital module. It comprises a SMPS (400) for supplying power by converting the AC current into a DC current to the control module and the gateway module.

The branch circuit breaker 100 includes a current transformer CT 120 for detecting an overcurrent and an image current transformer ZCT 140 for detecting a leakage current and an arc. More specifically, the branch circuit breaker is equipped with a current transformer 120 to penetrate the power lines of each phase (R, S, T, N), and is equipped with an image current transformer 140 through which power lines of all phases pass.

However, only one power line is illustrated in the schematic diagram, not all of the R, S, T, and N phases.

The voltage / current sensing module 200 includes a sensing resistor 210 for converting an AC current signal into an AC voltage signal for each detection sensor such as the current transformer 120 or the image current transformer 140. In other words, the AC signal of the current transformer 120 or the image current transformer 140 is converted into a voltage through the sensing resistor 210.

The AC voltage signal converted by the sensing resistor 210 is amplified by the amplifier 220 since the value of the sensing resistor 210 is generally very small and thus becomes an AC voltage signal having a very small value. Preferably, the signal is amplified using a differential amplifier which needs to be sufficiently amplified for RMS conversion and has a very large input impedance.

In addition, the voltage / current sensing module 200 includes a power supply side port for sensing a power supply state of a power supply terminal terminal line and a load terminal terminal line of the branch circuit breaker to determine the power supply state of the main circuit breaker and the branch circuit breaker 100. Couplers 230 and PC1 and load side photocouplers 240 and PC2 are mounted, respectively.

The power supply side photocoupler 230 is connected to the power supply terminal line of the branch circuit breaker diode 230a which emits light when the voltage is applied, and the transistor 230b which is conductive when the diode voltage is applied when the diode 230a emits light. It is composed.

The digital control module 300 receives a signal output from the connector terminal or the emitter terminal of the transistor 230b to sense the power state of the power supply side.

In addition, the load-side photocoupler 240 is also connected to the load-side terminal line of the branch circuit breaker to receive power and to emit light, and to the transistor 240b to which the base voltage is applied when the diode 240a emits light. The digital control module 300 receives a signal output from the connector terminal or the emitter terminal of the transistor 240b to sense the power state of the load side.

The power supply side photocoupler 230 forms a resistor 250 that acts as a pull-up resistor in series with the line between the power supply terminal terminal line and the diode 230a to be supplied with power to keep the input signal level constant.

In other words, the voltage applied to the diode 230a at the power supply terminal line is kept constant through the resistor 250 serving as a pull-up resistor, thereby maintaining a constant voltage applied at the power supply side. It prevents photocoupler malfunction and circuit breakdown that can occur when voltage is applied.

Similarly, the load side photocoupler 240 has a resistor 260 which acts as a pull-up resistor in series between the load-side terminal line and the diode 240a to which power is supplied to maintain the input signal level constant. Through a resistor 260 serving as a pull-up resistor, the voltage applied to the diode 240a at the load-side terminal line is kept constant to prevent malfunction of the photocoupler and circuit breakdown.

The signal is output through the emitter terminal or the collector terminal of each of the transistors 230b and 240b of the power supply side and the load side photocouplers 230 and 240 of the voltage / current sensing module 200 to output the digital control module 300. It is configured to be transmitted to the digital control module 300 through a power input and output terminal 310 formed with a plurality of pins.

3 is a diagram illustrating a data state of a power supply of a branch circuit breaker according to an exemplary embodiment of the present invention. Data relating to the case where the output terminals of the transistors 230b and 240b are set as the connector terminals.

In other words, the figure shows data detected through the digital control module 300 when a signal is output through the connector terminals of the transistors 230b and 240b of the power supply side and the load side photocouplers 230 and 240, respectively. .

First, when power is normally supplied to the branch circuit breaker 100 of the distribution panel, that is, when the power state is high signal from both the power supply terminal and the load terminal, both the photocouplers 230 and 240 operate and each transistor 230b. When the output signal is detected at the connector terminal of 240b), both low signals are detected.

For reference, when the output is detected at the connector stage due to the characteristics of the photocoupler, a low signal is output when the photocoupler is on, and a high signal is output when the photocoupler is off.

Accordingly, the digital control module 300 may recognize that normal power is supplied to both the load side and the power side through the detection data.

Next, when the branch circuit breaker trips and the contact of the branch circuit breaker is opened or the wiring state of the load side is bad, a low signal is output from the power supply side photocoupler 230, and the load side photocoupler 240 receives a high signal. Will come out.

Accordingly, the digital control module 300 may recognize that the branch breaker 100 trips through the detection data and that the contact is open or there is a bad wiring on the load side.

Next, when the power supply of the branch circuit breaker 100 is interrupted or when the entire wiring supply line is defective, such as when the main circuit breaker (not shown) of the distribution panel is operated, the power supply is supplied to both the power supply side and the load side of the branch circuit breaker 100. It is not fed.

In this case, a high signal is output from the power supply side photocoupler 230, and a high signal is also output from the load side photocoupler 240.

Therefore, the digital control module 300 may recognize that the contact is open while the main circuit breaker of the distribution panel is tripped through the detection signal, or that the overall wiring state of the distribution panel is defective.

However, in view of the characteristics of the photocoupler, it is preferable that the output terminal of the transistors 230b and 240b of the photocouplers 230 and 240 on the power supply side and the load side is selected as an emitter terminal so that power is supplied to the power supply side and the load side. Outputting a signal and configuring to output a Low signal when there is no power will make it easier for the remote administrator to visualize the status of the distribution board.

The digital control module 300 includes a power supply input and output terminal 310 for receiving a signal output from the power supply side photocoupler and a load side photocoupler, and a power signal of the power supply side and the load side from a signal received at the power supply input and output terminal. A control unit 320 for processing, a signal processing module 330 for detecting the quality of the AC voltage signal amplified by the amplifier, an effective value converter for converting the AC voltage signal processed through the signal processing module into an effective value of direct current 340, an AD converter 350 for converting the rms value of the direct current converted by the rms converter into a digital signal, a digital I / O 360 to which the AD converter and the digital signal converted by the controller are input, and the digital I / O A microprocessor 370 is included to control the branch circuit breaker while compensating and determining the digital signal received through the device.

The signal processing module 330 processes signals such as power factor (PF), harmonic distortion factor (THD), harmonic analysis, power amount, and the like. If the size becomes larger than the rating, it is judged that an overload has occurred.

At this time, the digital input / output unit 360 outputs a digital forced trip signal according to the current and voltage state determined by the microprocessor 370, and the forced trip signal is analog-converted through the controller 320. Output through # 5 of the power input and output terminal 310 is configured to penetrate the image current transformer 140, and forcibly trips the branch circuit breaker (100).

Although it is shown that the forced trip signal penetrates the image transformer 140, in addition to this method, a built-in MCB (Magnetic Circuit Breaker) function is provided in the branch circuit breaker to send and receive signals to the branch circuit breaker and the on / off branch circuit breaker. It may be configured to do so.

4 is a block diagram of an SMPS configured with an isolated AC voltage sensing circuit using a photocoupler in a remote electrical safety management system according to the present invention.

Referring to FIG. 4, the SMPS 400 includes a peak voltage detector 410, a comparator 420, a triangular wave oscillator 430, an insulation and signal transmitter 440, and a smoothing and adjusting unit 450. .

The peak voltage detection unit 410 reads an effective value of the magnitude of the AC voltage or reads a peak voltage value. If the peak voltage value is expressed as Vpk and the rms value is expressed as Vrms, the relationship is as follows. If the rms value is changed, the peak voltage value is changed proportionally. If the peak voltage value is read, the rms value is known.

Therefore, since the peak voltage varies linearly with the effective value of the AC voltage, the linearity of the oscillator generating the oscillation wave compared with the peak voltage should be considered.

Since the peak voltage value acquired from the primary AC power supply is a direct current (DC) value, a high frequency transformer or an optical element is used through switching, which is a general method for insulation.The signal is transmitted from the primary side to the insulated secondary side through switching. To this end, a comparison signal is required in which the switching interval can be changed constantly according to the magnitude of the DC value. For this reason, the triangular wave oscillator 430 is configured in the present invention.

In other words, since the output waveform of the standardized triangular wave signal has a linear slope during rising and falling, the width of the switching section is constantly changed in accordance with the change of the DC value acquired from the primary AC power supply. Therefore, a timer IC having an oscillation circuit excellent in linearity would be desirable.

The output of the triangular wave oscillator 430 is transmitted to a comparator 420 which performs a switching operation in comparison with the magnitude of the peak voltage in the peak voltage detector 410.

The comparator 420 compares the peak voltage detected by the AC power, which is the primary commercial power, through the peak voltage detecting unit 410 with the magnitude of the triangular wave generated by the triangular wave oscillator 430 to insulate and transmit the signal. It generates a square wave for the operation of the unit 440.

The insulation and signal transmission unit 440 may include an optical device such as a photocoupler, and transmits the signal of the primary side to the secondary side in an insulated state. At this time, since the width of the square wave increases as the magnitude of the commercial AC voltage increases, the size of the secondary side of the photocoupler increases accordingly.

The square wave signal transmitted to the secondary side through the photocoupler, which is the optical element, is converted into a DC value through an internal rectifying circuit of the smoothing and adjusting unit 450, and applies a DC voltage to the secondary system.

FIG. 5 is a circuit diagram of an insulating SMPS using a photocoupler according to the present invention, and the operation principle of the present invention will be described in more detail with reference to FIG. 5.

The peak voltage detection unit 410 is configured in the SMPS 400 that detects the magnitude of the AC voltage of the primary commercial power of the present invention and outputs the DC voltage to the secondary.

The peak voltage detection unit 400 includes two comparators IC1, IC2, a resistor, and a switching diode D1. When the primary side commercial power supplies the AC voltage AC_IN, which is full-wave rectified, it is applied to + PIN of IC1. The voltage divided by R3 and R5 is input, and this voltage is input to + PIN of the comparator 430 IC3 via IC2 serving as a buffer.

At this time, the signal generated by converting the highest value from the AC voltage inputted by the primary commercial power is full-wave rectified and input to the + PIN of the comparator 430 IC3.

IC4 of the triangular wave oscillator 430 oscillates a triangular wave using a timer IC, and the frequencies of the triangular wave oscillated are determined by R9 and C3. The triangular wave generated as described above is input to -PIN of comparator IC3 of the comparator 430 and is compared with an output voltage input to + PIN.

6 is an operation state diagram of a comparator configured in the SMPS according to the present invention, as shown in the comparator 420, the DC value of the peak voltage detector 410 is greater than the magnitude of the triangular wave of the triangular wave oscillator 430. If the output is large, the output maintains TTL High. If the DC value of the peak voltage detector 410 is smaller than the magnitude of the triangular wave of the triangular wave oscillator 430, the square wave is output by the pulse width modulation method to maintain the output TTL Low. Create

Therefore, the magnitude of the signal transmitted to the secondary side is changed according to the magnitude of the primary side AC voltage, and the triangular wave oscillator 430 includes a zener diode ZD1 for adjusting the magnitude of the waveform of the triangular wave. It also determines the magnitude of the waveform.

The zener diode ZD1 is configured to conduct when the voltage above the threshold voltage is applied at Vcc_P to apply a base voltage to the transistor Q1 so that power is input to IC4 while switching the transistor to generate an oscillation wave at IC4. .

When the DC value of the peak voltage detector 100 is greater than the signal of the triangular wave of the triangular wave oscillator 130, a square wave is generated and the diode of the primary side of the photocoupler included in the insulation and signal transfer unit 140 is conductive. The signal is insulated to the secondary side of the photocoupler.

The voltage signal transmitted to the secondary side is controlled to switch the transistor Q2 to conduct, and smoothes the voltage applied to the smoothing and adjusting unit 450 by Vcc_S using a smoothing circuit composed of a diode D3 and a capacitor C4. DC voltage is obtained.

At this time, it is also possible to adjust the desired voltage by using the adjusting circuit composed of the voltage divider resistors R17, R18, and VR1 in the smoothing and adjusting unit 450.

When the Vcc voltage on the secondary side is Vcc_S and the duty ratio of the pulse width of the square wave is D, the DC value through the smoothing and adjusting unit 450 is expressed as follows.

Here, assuming the parallel and parallel resistance values of the R17, R18, and VR1 resistors, RL and R12 are represented by RH, and the charge and discharge loss of C4 is assumed to be '0'. It can be expressed as

If the forward voltage drop of diode D3 is assumed to be Vf, the equation is modified as follows.

In addition, the value of this Vdc can easily output the desired voltage value by adjusting the variable resistor VR1.

As a result, the magnitude of the AC voltage is detected through the peak voltage detector 410 of the SMPS 400 according to the present invention, and the square wave signal is generated by comparing and modulating the triangular wave oscillated by the triangular wave oscillator 430 to generate a square wave. By converting to a DC voltage value by smoothing the magnitude of the DC voltage it can be seen the magnitude of the AC voltage.

At this time, the DC voltage changes at the same rate as the change of the AC voltage value, and when using a commercial AC power supply, the AC voltage value can be detected as an electrically insulated signal. There is an effect that can be usefully used in the equipment and controller.

The gateway module 500 includes a data storage 520 for storing detection data output from the digital control module and sensing data output from the sensor module 600, and detection data output from the digital control module 300. It is configured to include a processor 540 for controlling the flow of the sensing data output from the sensor module 600 and the transmission to the remote server.

In other words, the gateway module 500 stores the signal for the detection data of the digital control module 300 and transmits the signal to the remote server, and also transmits the information from the sensor module 600 to the remote server to remotely manage the hazard environment. Make sure you can watch.

That is, the gateway module 500 may transmit the current distribution panel status information to the remote server. However, the gateway module 500 records the past status information by time and date in the data storage 520 and stores it by itself to analyze the cause of the accident. It can be configured to utilize. The data storage 520 functions as a kind of black box in the distribution panel, and may be configured by embedding an SD RAM.

In addition, it provides a network connection method of RS485 and TCP / IP to flexibly cope with the installation location and environment, and is configured to wirelessly manage the sensing data of the sensor module 600 based on the Zigbee network protocol.

The sensor module 600 includes a heat sensor 610, smoke sensor 620, immersion sensor 630, vibration sensor 640, outlet (outlet) contact failure detection sensor 650, each It is configured to transmit the detection signal from the sensor to the gateway module 500 in a Zigbee wireless communication method.

The heat sensor 610 detects a fire by detecting a temperature in the air, the smoke sensor 620 detects a fire by detecting smoke in the air, the immersion sensor 630 is a flooding in the place where the distribution panel is installed It is configured to detect a state and prevent an accident caused by a short circuit.

In addition, the vibration sensor 640 to detect the vibration caused by the earthquake or the collapse of the building to prevent a short circuit accident or fire.

7A and 7B are state diagrams of outlets connected to plugs, and FIG. 8 is an operational configuration diagram of an outlet contact failure detection sensor configured in a sensor module mounted on a digital distribution panel according to the present invention.

As shown in Figures 7a, 7b, the outlet of the present invention is configured with a connection for various power supply, the plug is connected to the connection.

That is, the power input to the outlet is outputted as a plug, and in this structure, the contact resistance is caused due to the loosening between the connection part A of the outlet and the connection part B of the plug. Therefore, due to this, a voltage difference is generated and contact failure occurs.

The outlet contact failure detection sensor 650 detects such a degree of contact failure. As the contact failure occurs and the contact resistance component increases, the voltage of the outlet increases, so that the increase of the voltage becomes more than a predetermined value. In this case, since the risk of fire occurs due to outlet melting due to heat generation, the outlet contact failure detection sensor 650 continuously detects a difference in the input / output voltage of the outlet.

The outlet contact failure detection sensor includes a voltage detector 651 for detecting a voltage of an outlet, an amplifier 652 for amplifying a signal waveform output from the voltage detector, and a reference voltage for a voltage state of a contact failure of the voltage detector. The generated reference voltage generator 654 compares the output signal of the amplifier and the output signal of the reference voltage generator to determine an increased voltage amount, and the increased voltage amount determined by the comparison unit. It is configured to include a communication unit 656 to digitize the transmission to the gateway module 500.

Preferably, the temperature detection unit for detecting the contact resistance due to the temperature change by sensing the temperature of the connection of the outlet may be further added. The temperature detector may include a temperature sensor and generate a signal to prevent a fire caused by contact resistance when the temperature is higher than a predetermined reference value.

First, when a minute voltage is generated due to poor contact or oxidation of an outlet, the voltage detector 651 recognizes a minute signal waveform of a secondary side of a transformer using a transformer. The detected signal is amplified to a predetermined size through the amplifier 652 and input to the comparator 653.

At this time, the comparator 653 receives the signal amplified by the amplifier 652 and the reference signal generated by the reference voltage generator 654 to output the increased voltage change amount.

The output voltage is digitized and transmitted to the gateway module 500 through the output terminal 655 and the communication unit 656.

If it is not easy to individually install each sensor of the sensor module 600, if you need to install in one place can be integrated to operate to have a single ID, easy to install in the environment or to install at the optimum position for each sensor In case of selecting location individually for the purpose, it can be installed and operated to have individual ID.

ZigBee stands for "wireless short-range standard communication technology with low power, low cost, and ease of use, and standardizes higher protocols and applications based on the PHY layer and MAC layer of the IEEE802.15.4 standard. The network can be suitably applied to a remote electrical safety management system installed in a digital distribution panel such as the present invention which is rare in frequency of use.

In the detailed description of the present invention, specific embodiments have been described. However, it will be apparent to those skilled in the art that various modifications can be made without departing from the scope of the present invention.

1 is a block diagram of a three-phase wiring circuit breaker equipped with a micro switch for detecting a power supply state installed in a conventional distribution panel.

2 is a block diagram of a remote electrical safety management system installed in a digital distribution panel according to the present invention.

3 is a diagram in which the power state of the branch circuit breaker installed in the digital distribution panel according to the present invention is data.

4 is a block diagram of an insulated SMPS using a photocoupler in a remote electrical safety management system according to the present invention.

5 is a circuit diagram of an insulating SMPS using a photocoupler according to the present invention.

6 is an operational state diagram of the comparator unit configured in the SMPS according to the present invention.

7A and 7B are state diagrams of outlets connected to plugs.

8 is an operational configuration of the outlet contact failure detection sensor configured in the sensor module mounted on the digital distribution panel according to the present invention.

* Description of Symbols for Major Parts of Drawings *

100: branch breaker 120: current transformer

140: current transformer 200: voltage / current sensing module

210: sensing resistance 220: amplifier

230: power supply side photocoupler (PC1) 240: load side photocoupler (PC2)

300: digital control module 310: power input and output terminal

320: control unit 330: signal processing module

340: RMS converter 350: AD converter

360: digital input / output 370: microprocessor

400: SMPS 410: peak voltage detection unit

420: comparator 430: triangular wave oscillator

440: insulation and signal transmission unit 450: smoothing and adjusting unit

500: gateway module 520: data storage

600: sensor module 610: thermal sensor

620: smoke sensor 630: immersion sensor

640: vibration sensor 650: outlet contact detection sensor

651: voltage detector 652: amplifier

653: communication unit 654: reference voltage generating unit

655: output terminal 656: communication unit

Claims (12)

In the remote electrical safety management system installed in the digital distribution board equipped with the main circuit breaker and branch circuit breaker and the AC current is input through the power line, A voltage / current sensing module configured to receive and output a signal detected through the power line, the built-in current transformer, and the image current transformer in the branch circuit breaker to which the power line is connected; A digital control module for digitally converting a signal output from the voltage / current sensing module to detect a voltage / current state and an ON / OFF state of the main circuit breaker and the branch circuit breaker and output detection data; A sensor module for detecting a surrounding environment of the digital distribution panel and outputting sensing data through a wireless network; A gateway module for storing the detection data output from the digital control module and the sensing data output from the sensor module and transmitting the detected data to a remote server; And And a SMPS for converting and supplying an AC current of the power line to a DC current to the digital control module and the gateway module. According to claim 1, wherein the voltage / current sensing module, A sensing resistor for converting the AC current signal sensed by the current transformer or the image current transformer into an AC voltage signal; An amplifier for amplifying the AC voltage signal converted by the sensing resistor; A power supply side photocoupler connected to the power supply terminal line of the branch circuit breaker and receiving power from the power supply side and receiving a signal output from a terminal of a transistor that is turned on when the diode emits light to sense a power supply state on the power supply side; And A load side photocoupler connected to the load side terminal line of the branch circuit breaker and receiving power from the load side and receiving a signal output from a terminal of a transistor which is turned on when the diode emits light to sense a power state of the load side; Remote electrical safety management system installed in a digital distribution panel, characterized in that the configuration. The method of claim 2, wherein the digital control module, A signal processing module detecting a state of an AC voltage signal amplified by the amplifier; An effective value converter for converting an AC voltage signal processed through the signal processing module into an effective value of direct current; An AD converter for converting the rms value of the direct current converted by the rms value converter into a digital signal; A power input / output terminal for receiving signals output from the power supply side photocoupler and the load side photocoupler; A control unit for sensing a power state of a power side and a load side from a signal received at the power input / output terminal and processing a digital signal; A digital input / output unit to which the AD converter and the digital signal converted by the controller are input; And And a microprocessor for controlling the branch circuit breaker while compensating and determining the digital signal received through the digital input / output unit. The method of claim 3, wherein The digital input / output unit outputs a digital forced trip signal according to a current and voltage state determined by the microprocessor, The forced trip signal is analog-converted through the control unit and is output through the power input and output terminals to be configured to penetrate the image current transformer. The method of claim 1, The SMPS detects the magnitude of the AC voltage and outputs it in the form of DC voltage. A peak voltage detector configured to generate a signal by converting the highest value from the AC voltage inputted by the primary commercial power to full-wave rectification into a DC value; A triangular wave oscillator for oscillating a triangular wave whose magnitude is compared with a DC value of the peak voltage detector; A comparator unit for generating a square wave while performing a switching operation by comparing the magnitude of the DC value with the magnitude of the triangular wave; An insulation and signal transmission unit including a photocoupler which is turned on when the square wave is generated in the comparator unit and transmits the square wave to the secondary side; And And a smoothing and adjusting unit converting the square wave signal transmitted through the insulation and signal transmitting unit into a DC value. The method of claim 5, The triangular wave oscillator includes a zener diode configured to adjust the magnitude of the waveform of the triangular wave, wherein the remote electrical safety management system installed in the digital distribution panel. The method of claim 5, The comparator maintains the output of TTL High when the DC value of the peak voltage detector is greater than the size of the triangular wave of the triangular wave oscillator. The output is TTL when the DC value of the peak voltage detector is smaller than the size of the triangle wave of the triangular wave oscillator. A remote electrical safety management system installed in a digital distribution panel, characterized in that the square wave is generated by a pulse width modulation method to maintain a low, and the magnitude of the signal transmitted to the secondary side is changed according to the magnitude of the primary side AC voltage. The method of claim 5, The insulation and signal transmission unit includes a diode that is turned on when a square wave is generated in the comparator unit and a transistor that is turned on when a base voltage is applied from the diode. Remote electrical safety management system equipped with a digital distribution panel. The method of claim 5, The smoothing and adjusting unit includes a smoothing circuit for converting the DC value through the duty ratio of the pulse width of the square wave transmitted to the secondary side, and an adjusting circuit including a variable resistor for adjusting the magnitude of the converted DC value. Remote electrical safety management system installed in digital distribution board. The method of claim 1, wherein the gateway module, A data storage configured to store detection data output from the digital control module and sensing data output from the sensor module; And And a processor for controlling the flow of the detection data output from the digital control module and the sensing data output from the sensor module and the transmission to a remote server. The method of claim 1, wherein the sensor module, Remote electrical safety installed in the digital distribution panel, comprising a heat sensor, smoke sensor, submersion sensor, vibration sensor, outlet contact failure detection sensor configured to transmit the detection signal to the gateway module by Zigbee wireless communication method Management system. The method of claim 11, The outlet contact failure detection sensor may include a voltage detector configured to detect a voltage of the outlet; An amplifier for amplifying the signal waveform output from the voltage detector; A reference voltage generator configured to generate a reference voltage for the voltage state of the contact failure of the voltage detector; A comparator for comparing the output signal of the amplifier and the output signal of the reference voltage generator to determine an increased voltage amount; And And a communication unit for digitizing the increased voltage determined by the comparison unit and transmitting the digitized voltage to the gateway module.

Images