KR200472188Y1 - leakage current detecting apparatus - Google Patents

Abstract

The present invention relates to a leakage current detection device,
Leakage occurs at each line that supplies power to each streetlight from a data collector so that the streetlight information of each streetlight can be collected and stored in memory while requiring streetlight information according to the normality of each streetlight. It detects the current and transmits the current value to the administrator through wired / wireless communication so that it is not blocked when a short circuit occurs. It is made up.

Description

Leakage current detecting apparatus

The present invention relates to a leakage current detection device, and in detail, a data collector for collecting the streetlight information of each transmitted streetlight and requesting the transmission of the streetlight information according to the normal status of each streetlight and storing the information in a memory collector. Detects leakage current from each line supplying power to each streetlight and transmits the current value to the administrator through wired / wireless communication so that when leakage occurs, The present invention relates to a leakage current detection device capable of finding the cause and preventing an accident due to a short circuit.

Generally, electricity is a clean energy that is easy to use and manage, which is an essential energy source in modern society.

However, electricity is a major source of fire in urban areas, and the cause of such electric fires is leakage current.

Electrical apparatuses and electrical facilities have been installed for a long time by detecting leakage currents and interrupting the current according to the leakage current.

In the general circuit of electrical equipment, it is stipulated to protect general wiring circuit through leakage circuit breaker when leakage current is 30mA or more, and to protect power wiring circuit through leakage circuit breaker when leakage current is more than 50mA in power circuit.

In general, the shut-off circuits cut off electricity only by the leakage current, so that it is not possible to manage the electric interrupting by the accurate leakage current judgment.

That is, in order to prevent a fire hazard due to a short circuit, a short-circuiting alarm is installed to monitor the short-circuit state of the electric wire by installing a current transformer (hereinafter referred to as "ZCT") in the electric line of the individual unit structure Respectively.

Conventional earth leakage alarm checks the strength of the current sensed by the video current transformer to display the position of the earth leakage line on the output display and output the alarm signal to check the earth leakage state of the structure, but this is frequently caused by the system malfunction In addition, since the electric leakage of the electric line for the structure of the electric leakage structure is not displayed on the output display of the system, there are many problems such as the need to recover after checking the electric leakage of the electric line.

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Therefore, in recent years, the above problems can be solved by incorporating a single-chip microprocessor inside the system to indicate the leakage state detected in each video current transformer and the operation state of the system by simple external switch operation. The risk of large-scale accidents existed by failing to check the occurrence of repeated short circuits due to structural defects in the electric lines. Also, the speed of accident handling could be reduced by failing to immediately transmit the leaked data detected by the system to the management system. In addition, there were various closures such as the prevention of safety accidents.

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Thus, Patent Application No. 10-2004-0086509 (security and remote control / fault detection system) of October 28, 2004 has been proposed,

This network communication network connects a plurality of unspecified communication lines to allow mutual data communication related to remote control / fault detection such as security; A power supply unit for supplying an external commercial AC power or battery power to each component of the repeater; and a control unit for controlling the control signal for automatic flashing, such as security, transmitted from the control center computer to be relayed to each terminal in a jurisdiction area, The control center computer is controlled to relay surveillance data on the operation status of the security lamp transmitted from the terminal to the control center computer. When a failure occurs in the communication state with the control center computer, based on the sunrise and sunset time previously provided from the control center computer A control unit for counting the time to transmit a control signal for automatic flashing or the like to each terminal in a jurisdiction area, and a security manager for a function setting of the repeater, security for frequency selection for communication with each terminal located in a jurisdiction area, A key input unit for outputting an operation signal to the control unit, A memory for storing a driving program related to the driving of the repeater, and a controller for controlling the operation of the control center computer at the same time or separately from the control center computer through the network communication network, A data communication unit for receiving the control signal for automatic flashing and outputting the control signal to the control unit and transmitting monitoring data on the operation state of the security lamp transmitted from each terminal in the jurisdiction area to the control center computer under the control of the control unit, According to the control of the control unit, a control signal for security flicker or the like is converted into an RF signal and transmitted to each terminal in a jurisdiction area, and monitoring data on the operation state of a security light transmitted in an RF signal from each terminal in a jurisdiction area is received And outputting the RF signal to the control unit; And a timer for operating in accordance with the control of the control unit and outputting current time information to the control unit when a failure occurs in the communication state with the control center computer. The remote control / failure detecting unit Relay control signals for automatic blinking, such as simultaneous or separate security, transmitted from a control center for controlling remote control / failure detection such as security through the network communication network, to each terminal in a jurisdiction area through wireless communication with a plurality of terminals A plurality of relays for relaying surveillance data on the operation status of security lamps transmitted from each terminal to the control center through the network communication network;

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Controls the turn on / off of the security light based on the control signal for automatic flashing, and transmits the monitoring data on the operation status of the security light and ballast, the supply and power failure of the external power source, whether the short circuit occurs to the repeater, and the short circuit If this occurs, the operation of the internal circuit is cut off so that external power is not supplied to the internal circuit and security.When a failure occurs in the communication state with the repeater, the sunrise and sunset time previously provided from the control center computer through the repeater A control unit for controlling the lighting and turning off of the security light by counting time, and a key input unit for outputting a control signal of a repair person, such as security for setting the function of the terminal and selecting a frequency for communication with the repeater, to the control unit; , LED, display panel, etc., the terminal under the control of the controller Receiving a control signal for the automatic flashing of the security light from the repeater and the display unit for displaying the operating state of the security light and outputs to the control unit, and transmits the monitoring data for the operating state of the security light to the repeater under the control of the control unit An RF communication unit, an earth leakage blocking unit which cuts off the external commercial AC power to prevent the external commercial AC power from being supplied to the terminal and the security lamp, and a power supply control for turning on and off the security lamp under the control of the controller; When a short circuit occurs, the operation of the internal circuit is cut off according to the control of the controller, and when the short circuit is released, the circuit breaker normally performs the lighting and extinction control of the security light by automatically recovering the circuit and the protection of the internal circuit element. For the surge voltage included in the external commercial AC power supply The surge absorber detects the amount of power used by the control unit and the control unit, and detects the amount of power used by the terminal and the security unit and outputs the power amount to the control unit. Including a timer for outputting the current leakage information to the control unit when a failure occurs in the communication state with the relay detecting unit and the repeater to output the control unit to output the current time information to the control unit, simultaneous or separate Receives control signals for automatic flashing of security lamps from the repeater to turn on and off the security lamps, and monitors data on the operation status of the security lamps and ballasts, the supply and interruption of external power sources, and the occurrence of a short circuit. Transmission, and if a short circuit occurs, So that source is not supplied to boandeung, and lighting of the boandeung by a timer built in if a failure occurs in the state of communication with the repeater, a plurality of terminals to perform the light-off;

Generation of control signals for automatic flashing such as simultaneous or individual security, according to a predetermined sunset, sunrise time or administrator's operation, and control of transmission to the plurality of repeaters, and transmission from the plurality of repeaters through the network communication network Real-time monitoring is performed based on monitoring data such as security lights and ballasts' operation status, external power supply and power failure status, and whether there is a short-circuit. Control to transmit to the mobile communication terminal of the person in charge of the security such as responsible for the security, and to control the accumulation and storage of information on the operation status, failure history, maintenance, etc. for each security, and remote control such as security according to the operation of the administrator Input key signals according to various programs and setting status change for fault detection Receiving key input unit for receiving and outputting to the control unit, a plurality of terminal information installed with each security, a plurality of repeater information, security installed in each jurisdiction area to relay data communication between each terminal and control center in the area And a mobile communication terminal information held by a repair person, such as security, and a database for accumulating and storing information on operation status, failure history, and maintenance for each security lamp in real time according to the control of the controller, and control of the controller. Process the transmission of control signals for automatic flashing, such as simultaneous or individual security, to the plurality of repeaters via the network communication network, and the operation states of the security lights and ballasts from the plurality of repeaters through the network communication network, Monitor data on supply, power failure, leakage, etc. A data communication unit for outputting to the control unit, a display unit for displaying a monitoring state for each security lamp on the screen under the control of the control unit, and generating a message about an error occurrence such as security for emergency recovery under the control of the control unit; In addition, a message transmission processing unit for transmitting the generated message to the mobile communication terminal of the repair person in charge of the corresponding area through the network communication network, a plurality of terminal information that is installed with each security, is installed in a certain jurisdiction Real-time monitoring is performed based on the monitoring data for the operation state of each security light transmitted from the plurality of terminals through the plurality of repeaters, and if an error occurs in the security result as a result of the real-time monitoring, a message about an error occurrence is generated. Movement of repair person in charge such as security And transmitted to the new terminal, the accumulated information about each boandeung by working status, faults, maintenance on the database, which stores the control center computer; And

And a plurality of mobile communication terminals for receiving a message regarding an error occurrence of a specific area security lamp from the control center computer and displaying the message on the screen.

However, according to the conventional remote control / failure detection system such as the above-mentioned security system, when the security lamp is managed, it is checked when a failure occurs and information about the failure is informed. However, It is not possible to inform the user in advance that the power supply is interrupted due to a short circuit.

The present invention is to solve the conventional problems as described above, while requesting to transmit the street light information according to the normal status of each street light, so as to collect the stored street light information of each of the transmitted street light so that you can check in the state A data collector detects leakage current from each line supplying power to each street light and transmits the current value to the administrator through wired / wireless communication to prevent the leakage when leakage occurs. It is an object of the present invention to provide a leakage current detection device that can detect the cause and prevent an accident caused by a short circuit if it proceeds.

Leakage current detection device of the present invention for achieving the above object,

When AC 220V power is supplied from the distribution panel to the power supply unit to the data collector installed near the distribution panel that supplies power to a number of street lamps, it is supplied stably with the operating power of DC 5V and DC 12V.

The microprocessor, which sends streetlight information according to the normality of all streetlights connected to the left and right through multiple power lines, sends an information transmission command to each streetlight with an address or checks the streetlight information transmitted from each streetlight. To control,

Under the control of the microprocessor to store the digital signal of the transmitted address and street light information in the memory,

When the administrator turns on the confirmation key of the key input unit, the display driving unit displays the street light information stored in the memory on the display unit by letter and number, by controlling the microprocessor that recognizes the key input unit. ,

Transmitting the first wireless data input / output unit under the control of the microprocessor to read the street light information stored in the memory from the second wireless data input / output unit of the portable PC such as a laptop connected by wireless communication,

Leakage current detection unit of the video current transformer that takes the current flowing through each power line as an input to detect the leakage current,

When a leakage current is detected from the leakage current detection unit, the leakage current value detection unit calculates a leakage current value from the detected leakage current and transmits the leakage current value to the microprocessor together with the information of the power line where the leakage current has occurred.

Under the control of the microprocessor, the signal conversion unit converts the information of the power line and the leakage current value of the leakage current generated into a transmission signal,

In the CDMA module receiving the transmission signal converted by the signal conversion unit to be transmitted to the wireless single-shot of the manager,

Modulating the digital signal of the information transmission command and the address transmitted through the output of the microprocessor in the PLC transmitter;

Amplifying by the first amplifier of the PLC transmitter of the modulated digital signal modulated by the modulator,

In the power amplifier of the PLC transmitter receiving the modulated digital signal amplified by the first amplifying unit to amplify again with respect to the current and voltage of the modulated digital signal,

And outputting the modulated digital signal amplified by the power amplifying unit to a power line while performing a breakdown voltage processing by the first transmission coupling transformer of the PLC transmitting unit.

In response to the information transfer command of the data collector, the plurality of street lamps transmit their digital signals of their address and street light information sequentially to the microprocessor through a power line through internal street light control units.

The receiving coupling transformer of the PLC receiver coupled to the power line is configured to induce the modulated digital signal by the LC tuning frequency including the transformer.

Amplifying the modulated digital signal in the second amplifier of the PLC receiver to correct the reception sensitivity,

In the BPF of the PLC receiving unit receiving the modulated digital signal amplified by the second amplifying unit passes only the signal of the digital frequency band and blocks other signals,

Amplifying the modulated digital signal passing through the BPF again in the third amplifier of the PLC receiver to improve the reception intensity,

The demodulation unit of the PLC receiving unit receiving the modulated digital signal amplified by the third amplifying unit restores the original digital signal to the input terminal of the microprocessor.

In the leakage current detecting apparatus according to the present invention, by outputting an information transmission command through power line communication to each street lamp, the street lamp control unit of each street lamp to check whether the lamp lamp and the line failure,

Regardless of whether a failure occurs as a result of the self-check of the street lamp controller, the street lamp controller transmits street lamp information according to whether the street lamp is normally operated to the data collector through power line communication.

The data collector stores the street light information transmitted from each street light in the memory together with the address and outputs the memory as needed.

In the above data collector, it is possible to efficiently manage street lamps and lines by allowing wired and wireless transmission in the state of storing leakage current values and leakage current generated in all power lines except the range controlled by the street lamp control unit. It has the effect of making it possible.

1 is a schematic view showing a state of use of the present invention.
2 is a block diagram of a leakage current detection device of the present invention.

Hereinafter, with reference to the accompanying drawings illustrating a preferred embodiment of the present invention.

1 and 2 show the configuration of the leakage current detection apparatus according to the present invention,

The data collector collects street lamp information based on the failure and checks whether there is a failure of the street lamp and the line of each street lamp, and stores the leakage current and the leakage current of the line along with the street lamp information. Allows wired and wireless transmission to efficiently manage street lights,

When AC 220V power is supplied from the distribution panel A to the data collector B installed near the distribution panel A which supplies power to a plurality of street lights, the power supply unit 1 stably supplies the operating power of DC 5V and DC 12V. Wow,

Each of the street lamps 30 to 30n transmits the street lamp information according to whether all of the street lamps 30 to 30n connected to the left and right sides are normal through the plurality of power lines 100, 100a, 100b, and 100c. A microprocessor (2) for controlling an internal operation while sending an information transmission command with an address or checking street light information transmitted from each street light,

A memory 3 for storing a digital signal of an address and street light information transmitted under the control of the microprocessor 2;

When the manager turns on the confirmation key of the key input unit 4, the streetlight information stored in the memory 3 is received by the control of the microprocessor 2 that recognizes the key input unit 4. A display driver (5) for displaying information according to the number of the fault and the type of the fault in letters and numbers,

The first wireless data input / output unit 7 as long as it transmits to the second wireless data input / output unit 41 of the portable PC 40 such as a laptop connected by wireless communication so as to read the street light information stored in the memory 3. )Wow,

A leakage current detection unit 8 of the video current transformers ZCT1, ZCT2, ZCT3, and ZCT4 which detect leakage current by inputting current flowing through the respective power lines 100 to 100c,

When the leakage current is detected from the leakage current detection unit 8, the leakage current value is calculated from the detected leakage current, and the leakage current transmitted to the microprocessor 2 together with the information of the power lines 100 to 100c in which the leakage current is generated. A current value detector 9,

A signal converter 10 for converting the information of the power lines 100 to 100c and the information of the leakage current value in which leakage current is generated by the control of the microprocessor 2 into a transmission signal;

A CDMA module 11 which receives the transmission signal converted by the signal conversion unit 10 and transmits the transmission signal to the manager's wireless single transmitter 60;

A modulator 21 of the PLC transmitter 20 for modulating a digital signal of an information transfer command and an address transmitted through the output terminal TX of the microprocessor 2,

A first amplifier 22 of the PLC transmitter 20 for amplifying the modulated digital signal modulated by the modulator 21,

A power amplifier 23 of the PLC transmitter 20 which amplifies again the current and voltage of the modulated digital signal amplified by the first amplifier 22;

A first transmission coupling transformer 24 of the PLC transmitter 20 for outputting the modulated digital signal amplified by the power amplifier 23 to the power lines 100 to 100c while performing breakdown voltage processing;

The address of the street lamp for outputting information through the internal street lamp control unit 31 and the digital signal of the street lamp information are sequentially transmitted to the microprocessor 2 through the power lines 100 to 100c by the information transmission command. A plurality of street lights 30 to 30n to transmit,

A reception coupling transformer section 51 of the PLC receiver section 50 which modulates the digital signal from the power line 100 by the transformer coupled to the power lines 100 to 100c and the LC tuning frequency;

A second amplifier 52 of the PLC receiver 50 for amplifying the modulation digital signal for correction of reception sensitivity;

A band-pass filter (BPF) 53 of the PLC receiver 50 which passes only signals in the digital frequency band of the modulated digital signal amplified by the second amplifier 52 and blocks other signals;

A third amplifier 54 of the PLC receiver 50 for amplifying again the modulated digital signal passing through the BPF 53 to improve reception intensity;

The demodulation unit 55 of the PLC receiving unit 50 which restores the modulated digital signal amplified by the third amplification unit 54 to the original digital signal and transmits it to the input terminal RX of the microprocessor 2. It is made up.

Leakage current detection device of the present invention configured as described above,

When AC 220V power is supplied from power distribution board (A) to power supply unit (1) to the data collector (B) installed close to the distribution board (A) that supplies power to a number of street lights, Ensure stable supply to operating power.

The microprocessor 2 which transmits street light information according to the normality of all the street lights 30 to 30n connected to the left and the right through the plurality of power lines 100 to 100c, respectively, corresponds to each of the street lights 30 to 30n. In order to control the internal operation while sending an information transmission command with an address or checking streetlight information transmitted from each of the streetlights 30 to 30n.

Under the control of the microprocessor 2, the digital signal of the address and street light information transmitted from each street light 30 to 30n is stored in the memory 3 so that the information can be read by wire or wireless when necessary. Make sure

When the administrator turns on the confirmation key of the key input unit 4, the display driving unit 5 displays street light information stored in the memory 3 by the control of the microprocessor 2 that recognizes the key input unit 4. The information according to the number and the type of failure is displayed in letters and numbers so that the data collector B can be visually checked at the site where the data collector B is installed.

From the first wireless data input / output unit 7 under the control of the microprocessor 2 to the second wireless data input / output unit 41 of the portable PC 40 such as a notebook connected by wireless communication, the memory ( 3) Send the streetlight information stored in the file so that it can be read or downloaded.

In addition, the data analyzer detects a short-circuit state due to a leakage current by the internal street light control unit 31 in each of the street lamps 30 to 30n, but each line of power lines 100 supplying a source of power to the street light. Image current transformers (ACT1) (ZCT2) (ZCT3) (ZCT4) which cannot detect any leakage current generated at ˜ (100c) and input current flowing through the respective power lines 100 to 100c in the data analyzer. The leakage current detector 8 detects the leakage current.

When a leakage current is detected from the leakage current detection unit 8, the leakage current value detection unit 9 calculates a leakage current value from the detected leakage current together with the information of the power lines 100 to 100c in which the leakage current has occurred. Transfer to the microprocessor (2).

The signal conversion unit 10 converts the information of the power lines 100 to 100c and the leakage current value in which the leakage current has been generated by the control of the microprocessor 2 into a transmission signal, thereby enabling wireless transmission. .

Since the CDMA module 11 receiving the transmission signal converted by the signal conversion unit 10 is transmitted to the wireless single device 60 of the manager, the leakage caused by the leakage current may lead to a fire, Regardless of how big or small, managers can dig accurately and take action quickly.

Meanwhile, the modulator 21 of the PLC transmitter 20 modulates the digital signal of the information transfer command and the address transmitted through the output terminal TX of the microprocessor 2.

The first amplifier 22 of the PLC transmitter 20 receiving the modulated digital signal modulated by the modulator 21 amplifies the modulated digital signal.

The power amplification unit 23 of the PLC transmitter 20 receiving the modulated digital signal amplified by the first amplifying unit 22 amplifies again the current and voltage of the modulated digital signal so that the signal in transmission Prevents distortion or weakness.

The modulated digital signal amplified by the power amplifier 23 is outputted to the power lines 100 to 100c while performing a breakdown voltage processing by the first transmission coupling transformer 24 of the PLC transmitter 20.

In response to the information transfer command of the data collector B, the street lights 30 and 30n output the information through the street lamp control unit 31 and the digital signal of the street light information sequentially. Transfer to the microprocessor (2) through (100) ~ (100c).

The reception coupling transformer 51 of the PLC receiver 50 coupled to the power lines 100 to 100c causes the digital signal to be modulated by the LC tuning frequency including the transformer.

The second amplifying unit 52 of the PLC receiving unit 50 amplifies the modulated digital signal to correct the reception sensitivity.

The BPF 53 of the PLC receiver 50 receiving the modulated digital signal amplified by the second amplifier 52 passes only signals in the digital frequency band and blocks other signals.

The modulated digital signal passing through the BPF 53 is amplified again by the third amplifier 54 of the PLC receiver 50 so that the reception strength is improved.

The demodulator 55 of the PLC receiver 50 receiving the modulated digital signal amplified by the third amplifier 54 restores the original digital signal to the input terminal RX of the microprocessor 2. By transmitting it, it is possible to collect and manage streetlight information of all streetlights 30 to 30n.

In the above described and illustrated with respect to the preferred embodiment of the present invention, the present invention is not limited to the above-described embodiment, it is common in the field to which the present invention belongs without departing from the spirit of the present invention claimed in the claims. Various modifications may be made by those skilled in the art, and such modifications are intended to fall within the scope of the appended claims.

1: power unit 2: microprocessor
3: memory 6: display
7, 41: wireless data input / output section 8: leakage current detection section
9: leakage current value detection unit 10: signal conversion unit
11: CDMA module 20: PLC transmitter
30 to 30n: street light 40: portable PC
50: PLC receiver 60: wireless terminal
100-100c: power line

Claims (1)

When AC 220V power is supplied from the distribution panel A to the data collector B installed near the distribution panel A which supplies power to a plurality of street lights, the power supply unit 1 stably supplies the operating power of DC 5V and DC 12V. Wow,
Information transmission instruction to each street light 30 to 30n to send street light information according to whether all of the street lights 30 to 30n connected through the plurality of power lines 100, 100a, 100b and 100c are normal. A microprocessor (2) for controlling an internal operation while sending a message with an address or checking street light information transmitted from each street light,
A memory 3 for storing a digital signal of an address and street light information transmitted under the control of the microprocessor 2;
When the manager turns on the confirmation key of the key input unit 4, the streetlight information stored in the memory 3 is received by the control of the microprocessor 2 that recognizes the key input unit 4. A display driver (5) for displaying information according to the number of the fault and the type of the fault in letters and numbers,
A first wireless data input / output unit 7 as long as it transmits to the second wireless data input / output unit 41 of the portable PC 40 connected by wireless communication so as to read street light information stored in the memory 3;
A leakage current detection unit 8 of the video current transformers ZCT1, ZCT2, ZCT3, and ZCT4 which detect leakage current by inputting current flowing through the respective power lines 100 to 100c,
When a leakage current is detected from the leakage current detection unit 10, the leakage current value is calculated from the detected leakage current, and the leakage current transmitted to the microprocessor 2 together with the information of the power lines 100 to 100c in which the leakage current has been generated. A current value detector 9,
A signal converter 10 for converting the information of the power lines 100 to 100c and the information of the leakage current value in which leakage current is generated by the control of the microprocessor 2 into a transmission signal;
A CDMA module 11 which receives the transmission signal converted by the signal conversion unit 10 and transmits the transmission signal to the manager's wireless single transmitter 60;
A modulator 21 of the PLC transmitter 20 for modulating a digital signal of an information transfer command and an address transmitted through the output terminal TX of the microprocessor 2,
A first amplifier 22 of the PLC transmitter 20 for amplifying the modulated digital signal modulated by the modulator 21,
A power amplifier 23 of the PLC transmitter 20 which amplifies again the current and voltage of the modulated digital signal amplified by the first amplifier 22;
A first transmission coupling transformer 24 of the PLC transmitter 20 for outputting the modulated digital signal amplified by the power amplifier 23 to the power lines 100 to 100c while performing breakdown voltage processing;
The address of the street lamp for outputting information through the internal street lamp control unit 31 and the digital signal of the street lamp information are sequentially transmitted to the microprocessor 2 through the power lines 100 to 100c by the information transmission command. A plurality of street lights 30 to 30n to transmit,
The reception coupling transformer unit 51 of the PLC receiver unit 50 which induces the modulated digital signal from the power lines 100 to 100c by the transformer coupled to the power lines 100 to 100c and the LC tuning frequency. ,
A second amplifier 52 of the PLC receiver 50 for amplifying the modulation digital signal for correction of reception sensitivity;
A BPF 53 of the PLC receiver 50 which passes only signals in the digital frequency band of the modulated digital signal amplified by the second amplifier 52 and blocks other signals;
A third amplifier 54 of the PLC receiver 50 for amplifying again the modulated digital signal passing through the BPF 53 to improve reception intensity;
The demodulation unit 55 of the PLC receiving unit 50 which restores the modulated digital signal amplified by the third amplification unit 54 to the original digital signal and transmits it to the input terminal RX of the microprocessor 2. Leakage current detection device characterized in that the configuration.

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