KR101474848B1 - Lifetime estimating and management device of surge protector - Google Patents

Abstract

The present invention relates to a device capable of predicting and managing the lifetime of a surge protector which can: predict the lifetime by measuring a leakage current; acquire, display and store various kinds of data about surge inflow; and execute control and management by product accordingly at a remote place. The device includes: a surge protection unit; a monitoring unit which includes an AC/DC converter for converting 24V AC power outputted from the AC/AC converter of the surge protection unit to DC 5V, a DC input unit for outputting a 48V DC voltage through a rectifier, a DC/DC converter for converting the output voltage of the DC input unit (230) to 5V DC and outputting the 5V DC, a leakage current detection unit for detecting the current flowing on the ground line using a current detection sensor, a surge current detection unit for inputting the amount of the detected surge current detected by each current detection sensor, a surge count detection unit for counting the count of the surges detected by the current detection sensor regardless of the amount, an interrupt generation unit for generating a surge interrupting signal if a surge is detected by the current detection sensor, an LCD unit for performing display according to the output command from a control unit, a failure detection unit for determining the existence of a failure of a surge preventing element and inputting the result to the control unit, and the control unit for detecting the leakage current inputted from the leakage current detection unit and predicting the lifetime of the surge protection unit according to the amount of the detected leakage current; and a communication unit which communicates with the monitoring unit and executes control and management at a remote place.

Description

TECHNICAL FIELD [0001] The present invention relates to a device for predicting and managing the life of a surge protector,

The present invention relates to a multifunctional surge protector, and more particularly, to a multifunction surge protector that estimates a life time by measuring a leakage current, simultaneously acquires various types of data according to surge inflow, displays and stores the same, To a device capable of predicting and managing the life of a surge protector capable of comprehensive management.

The conventional surge protector is a device for preventing a load burnout due to a surge voltage caused by lightning or the like. In the conventional surge protector, the surge protection elements including the varistor are deteriorated by the surge inflow of several times, It can be supplied to the electronic device in a state where it can not be used, thereby causing damage to the electronic device.

In the case of such a surge protector, the lifetime of the surge protector is determined by the number of times of lightning or the surge or the size of the lightning surge. In the prior art, however, the life of the surge protector is unknown.

Accordingly, Korean Patent No. 10-1182596 discloses a surge protector lifetime display device and method for allowing a user to know when a surge protector is to be replaced.

This technology can check the amount of leakage current to the ground, check if the surge protector is properly installed on the ground wire, and check the date of surge protector leakage current, surge frequency, surge input capacity, So that it is possible to obtain statistical data by time.

However, such a conventional technique does not disclose remote control for the management and control of such a surge protector, and it is not systematic.

Patent Registration No. 10-1182596, Registration Patent No. 10-1013198

SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and an object of the present invention is to provide a method and apparatus for measuring leakage current to predict life, at the same time to acquire various types of data according to surge inflow, And to provide a device capable of predicting and managing the life span of a surge protector enabling control and comprehensive management.

According to an aspect of the present invention, there is provided a surge suppression device comprising: a current sensing sensor interposed in a power supply line for sensing a current flowing in a power supply; a surge suppression element suppressing a surge signal interposed between the neutral line and each line, A surge protection means including an AC / AC converter for down converting the input 220V AC power to AC 24V; An AC / DC converter for converting a 24V AC power from the AC / AC converter of the surge protection means into a DC voltage of 5V and supplying the DC voltage to a drive voltage of each circuit unit, a DC input unit for outputting a DC 48V voltage through a rectifier, A DC / DC converter that converts the output voltage of the input unit 230 to 5 V DC and supplies the output voltage to the driving voltage of each circuit unit, a leakage current sensing unit that senses a current flowing on the ground line through the current sensing sensor, A surge current detector for converting the magnitude of the surge current detected by each current sensor into a voltage and inputting the voltage to the controller; and a controller for counting the number of times, regardless of the size of the surge detected by the current sensor, A surge frequency detector for detecting a surge from the current sensor and inputting a corresponding surge interrupt signal to the controller, A leakage detection unit for detecting a leakage current inputted from the leakage current detection unit and for detecting the presence or absence of a failure of the surge suppression element; And a control unit (290) for predicting the life of the surge protection means according to the amount of the detected leakage current; And communication means for communicating with the monitoring means and performing remote control and management.

According to the present invention, the lifetime prediction of the control unit of the monitoring means determines that the lifetime is 100% (steady state) if no leakage current flows, 75% when the leakage current is 2mA, 50% when the leakage current is 4mA, Is 25% for 6 mA and 8 mA for leakage current, it is judged as defective or immediate replacement.

According to the present invention, the items displayed on the LCD unit of the monitoring means include a life display (graph) of a surge protector, a leakage current amount display, a surge inflow display, a surge inflow date display, a surge inflow path display, A surge input size display, a surge input data display, an AC input voltage display, and a product unique number display.

According to another aspect of the present invention, the monitoring means may include an AC voltage detector for detecting an AC power output from the AC / AC converter and inputting the detected AC power to the controller, and a display for indicating whether the input AC power is normal, And an LED display unit for performing an LED output.

According to the present invention, the communication means can perform a TCP / IP communication between a serial converter for performing a serial communication signal conversion between the control unit of the monitoring means and the communication control unit, and an internal client apparatus (PC) And a communication control unit for controlling the communication unit.

According to another aspect of the present invention, the monitoring unit further includes a signal detector for detecting an output analog signal of the associated peripheral devices, converting the detected analog signal into a digital signal, and transmitting the digital signal to the controller.

As described above, according to the present invention, the leakage current is measured to estimate the lifetime, and at the same time, various types of data corresponding to surge inflow are acquired, displayed and stored, and control .

Therefore, the surge protector of the present invention provides a merit that it is possible to replace the pre-product instead of the post-process according to the product failure by predicting the replacement time by remotely detecting the surge related information and the remaining life of the product.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an apparatus for predicting and managing the life span of a surge protector according to the present invention;
2 is a detailed circuit block diagram of the monitoring means according to the present invention,
3 is a detailed circuit block diagram of the communication means according to the present invention;
FIG. 4 is a flowchart illustrating an overall operation of a device capable of predicting and managing the life span of the surge protector according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

FIG. 1 is a block diagram of an apparatus for predicting and managing the life span of a surge protector according to the present invention.

As shown in the figure, the apparatus for predicting and managing the life of the surge protector of the present invention includes surge protection means 100, monitoring means 200, and communication means 300.

The surge protection means 100 is interposed in a three-phase or single-phase power supply line,

Current sensors 111 to 115 for sensing the currents flowing through the neutral line N, the ground line G and the three-phase lines T, S and R, respectively, Surge suppression elements 121 to 124 for suppressing surge signals introduced into the AC / AC converter 130, and an AC / AC converter 130 for downconverting the input 220 V AC power to AC 24V.

The AC / AC converter 130 protects the AC / DC converter 210 of the surveillance means 200, which will be described later, with a surge protection function when a surge is introduced. However, the AC / AC converter 130 performs a dual protection function with an insulation type XFMR do.

In the case of a single phase, the power supply line is composed of a neutral line N, a ground line G and a single-phase line H.

2, the monitoring means 200 includes an AC / DC converter 210, an AC voltage detection unit 220, a DC input unit 230, a DC / DC converter 231, a leakage current detection unit 240, An interruption generation unit 253, an LCD unit 260, a signal detection unit 270, a failure detection unit 280, and a control unit 290. The current detection unit 251, the surge number detection unit 252, the interruption generation unit 253,

The AC / DC converter 210 converts the 24V AC power output from the AC / AC converter 130 of the surge protection means 100 to DC 5V and supplies the DC voltage to the driving voltage of each circuit unit.

The AC voltage detector 220 detects AC power output from the AC / AC converter 130 and inputs the detected AC power to the controller 290.

The DC input unit 230 generates and outputs DC 48V as a DC voltage output through the rectifier. The DC / DC converter 231 converts the 48V DC voltage output from the DC input unit 230 to 5V DC And supplies it to the drive voltage of each circuit part.

The AC / DC converter 210 and the DC input unit 230 are configured to be able to receive the AC power 220V and the DC 48V at the same time. When the AC 220V of the power source is turned off, the DC power source 230 DC converter 231 by AC 220V at the time of DC 48V cut-off of the DC power supply unit 230. The AC / DC converter 210 ) (DC 5V) of the driving voltage.

Accordingly, the AC voltage detector 220 detects the AC power from the AC / AC converter 130 and displays the corresponding indicator when the input AC power is normal, broken, or turned off. ) To perform LED output.

The leakage current sensing unit 240 senses a current flowing on the ground line G through the current sensing sensor 112 and inputs the sensed current to the control unit 290.

The surge current detection unit 251 converts the magnitude of the surge current detected from each of the current sensors 111 to 115 that sense the current flowing through the power line to a voltage and inputs the voltage to the controller 290, The detection unit 252 counts the number of times irrespective of the size of the surge detected from the current sensors 111 to 115 and inputs the counted number to the control unit 290. The interruption generation unit 253 generates the interruption signal 115), a surge interrupt signal corresponding to the surge is input to the controller 290.

The LCD unit 260 performs various types of display according to the output control of the controller 290.

The items displayed on the LCD unit include, for example, a lifespan (graph) display of a surge protector, a leakage current amount display, a surge inflow frequency display, a surge inflow date display, a surge inflow path display, a surge inflow time display, Input data display, AC input voltage display, product unique number display, and the like, but are not limited thereto.

The signal detector 270 detects an analog signal of the connected peripheral devices, processes the digital signal, and transmits the digital signal to the controller 290.

The peripheral device may be, for example, an automatic circuit breaker type circuit breaker.

The failure detector 280 is connected to the surge suppressors 121 to 124 to determine whether there is a failure, and inputs the failure to the controller 290.

The controller 290 detects a leakage current inputted from the leakage current detector 240 and estimates the life of the surge protector 100 according to the detected leakage current.

If the leakage current does not flow, the lifetime is determined to be 100% (steady state). If the leakage current is 2 mA, the leakage current is 4 mA, the leak current is 6 mA, It is judged as defective or immediate replacement.

However, it is not necessarily limited to the leakage current value.

The control unit 290 also receives data detected and stored at the request of the communication means 300, that is, life prediction data of the surge protector, leakage current amount, number of surge inflows, surge inflow date, surge inflow path, surge inflow time, Size, surge input data, AC input voltage, and product unique number data.

This is to allow the surge protection means 100 to remotely manage and control the individual surge protectors included therein.

3, the communication means 300 includes a serial converter 310, a communication control unit 320, and a client device 330. [

The serial converter 310 is a serial communication (RS-232) signal conversion device between the control unit 290 of the monitoring means 200 and the communication control unit 320. The communication control unit 320 is an internal client device ) 330, or a control server 400 at a remote location.

Therefore, the surge protecting device of the present invention can be remotely managed and controlled through the client device 330 or the control server 400.

The overall operation of the life predicting and managing device of the surge protector thus constructed will be described with reference to the flowchart in Fig.

First, when the 220V power (AC) is applied, the AC 22V voltage reduced from the AC / AC converter 130 of the surge protection means 100 is supplied to the AC / DC converter 210 of the monitoring means 200 through DC 5V And supplies the driving voltage to each part including the control unit 290.

At the same time, the DC 48V voltage generated through the DC input unit 230 is also converted to DC 5V by the DC / DC converter 231 to provide a driving voltage to each circuit unit.

At this time, the AC voltage detector 220 detects an AC power source output from the AC / AC converter 130, and outputs an LED to the LED display unit 221 so that a display corresponding to the normal state of the input AC power source is identified. (S11)

At this time, the controller 290 confirms the product number (unique ID) stored in the memory (step S12)

If there is a pre-stored product number, the current time information is set. If there is no stored product number, a product number is generated and stored (S13 to S15)

When the setting according to the initial power input is completed, the controller 290 reads various detection values.

First, a leakage current value flowing through a power supply line is detected through a current detection sensor 112 and a leakage current detection unit 240. The AC voltage detection unit 220 detects an AC power output from the AC / AC converter 130 And the failure detection unit 280 detects the failure of the surge suppression elements 121 to 124.

The interrupt generator 253 is triggered only when a surge signal is input from each of the current sensors 111 to 115 to detect a value input from each of the current sensors 111 to 115, 251, and detects the number of surges through the surge frequency detector 252. In operation S17,

Also, the controller 290 detects a value input from the signal detector 270 (step S18)

When such information and data are detected, the controller 290 analyzes the bibliographic information, measures lifetime according to the leakage current, analyzes the information of the peripheral device, and stores the information and data (S19)

The LCD unit 260 displays and outputs the analyzed information.

Therefore, the LCD unit 260 is provided with the life prediction data of the surge protector, the leakage current amount, the number of surge inflow, the surge inflow date, the surge inflow path, the surge inflow time, the surge inflow size, Etc. are displayed.

Particularly, the life prediction data is displayed as a graph indicating a remaining life (percentage) or a numerical form display (S20)

At this time, the display output of the LCD unit 260 may be output only when a surge occurs. This is a function for reducing power consumption.

If a failure of the surge protection unit 100 occurs in the analysis step S19, the surge protection unit is declared defective and the corresponding display lamp is turned on through the LED display unit 221. (Steps S21 and S22)

If there is no communication command, the process returns to step S12. If the communication command is received, the corresponding data is transmitted to the serial converter 310 of the communication unit 300 ) (S23 and S24)

The serial converter 310 converts the data and transmits the converted data to the communication control unit 320. The communication control unit 320 transmits the data and information provided from the monitoring unit 200 to the client device 330 or the control server 320, (Step S25), and transmits the reply information according to the data reception to the monitoring unit 200. In step S25,

Therefore, the surge protector of the present invention provides a merit that it is possible to replace the pre-product instead of the post-process according to the product failure by predicting the replacement time by remotely detecting the surge related information and the remaining life of the product.

100: Surge protection means 111 to 115: Current sensing element
121 to 124: Surge suppression element 130: AC / AC converter
200: Monitoring means 210: AC / DC converter
220: AC voltage detection unit 221: LED display unit
230: DC input unit 231: DC / DC converter unit
240: Leakage current detection unit 251: Surge current detection unit
252: Surge frequency detector 253: Interrupt generator
260: LCD unit 270: signal detection unit
280: Fault detecting unit 290:
300: communication means 310: serial converter
320: Communication controller 330: Client device
400: control server

Claims (6)

Current detecting sensors 111 to 115 for detecting currents flowing in the power supply, respectively, which are interposed in the power supply line, surge suppressing elements 121 to 124 for suppressing surge signals interposed between the neutral lines and the respective lines, A surge protector (100) including an AC / AC converter (130) down-converting the input 220V AC power to AC 24V;
An AC / DC converter 210 for converting a 24V AC power source output from the AC / AC converter 130 of the surge protection means 100 into a DC 5V and supplying the DC 5V as a driving voltage for each circuit unit, A DC / DC converter 231 for converting an output voltage of the DC input unit 230 to 5 V DC and supplying the output voltage to the driving voltage of each circuit unit, A leakage current sensing unit 240 for sensing a current flowing on the ground line G through the current sensing unit 111 and a current sensing unit for sensing current flowing through the power line, A surge current detection unit 251 for converting the current detected by the current sensing sensors 111 to 115 to a control unit 290 and counting the number of surges irrespective of the size of the surge detected by the current sensors 111 to 115, (252), and when a surge is detected from the current sensors (111 to 115) An LCD unit 260 for performing display in accordance with an output command of the controller 290, and a surge suppressor 223 for outputting a surge interrupt signal to the surge suppressor 223, The leakage current detector 240 detects a leakage current and inputs the detected leakage current to the controller 290. The leakage current detector 240 detects a leakage current, Monitoring means (200) including a control unit (290) for predicting the service life of the means (100); And
And communication means (300) for communicating with the monitoring means (200) and performing remote control and management of the surge protector (200).
The method according to claim 1,
If the leakage current does not flow, the lifetime of the controller 290 of the monitoring unit 200 is determined to be 100% (steady state) if the leakage current does not flow, 75% if the leakage current is 2 mA, 50% Is judged to be defective or an immediate replacement if the leakage current is 6 mA and 25% and the leakage current is 8 mA, respectively.
The method according to claim 1,
Items displayed on the LCD unit 260 of the monitoring means 200 include a display of the lifespan (graph) of the surge protector, a display of the leakage current amount, a display of the number of surge inflows, a surge inflow date display, a surge inflow path display, A surge input size display, a surge input data display, an AC input voltage display, and a product unique number display.
The method according to claim 1,
The monitoring means 200 includes an AC voltage detector 220 for detecting the AC power output from the AC / AC converter 130 and inputting the detected AC power to the controller 290, OFF), the LED display unit (221) performs an LED output so as to identify a display thereof.
The method according to claim 1,
The communication means 300 includes a serial converter 310 for performing a serial communication (RS-232) signal conversion between the control unit 290 of the monitoring means 200 and the communication control unit 320, (330) or a remote control server (400) so as to enable TCP / IP communication with the control server (330) or the remote control server (400).
The method according to claim 1,
Further comprising a signal detector (270) for detecting an output analog signal of the peripheral devices connected to the monitoring means (200), converting the output analog signal into a digital signal, and transmitting the digital signal to the controller (290) Which can predict and manage.

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